36results about How to "Good pressure regulation effect" patented technology

The invention provides an optimal configuration of a 10 kV power distribution network parallel reactor and a compensation method of the 10 kV power distribution network parallel reactor. The optimal configuration of the 10 kV power distribution network parallel reactor and the compensation method of the 10 kV power distribution network parallel reactor are used for solving the problem that inductive reactive power optimal allocation of resources of insertion of small hydro to power distribution network and controlling switching of the reactive power compensation. The compensation method of the 10 kV power distribution network parallel reactor comprises the following steps: obtaining a voltage drop reactive decoupling formula by means of a decoupling deduction of the voltage drop formula; ensuring reactive decoupling coefficient according to the line reactance per kilometer and the line voltage reference; ensuring an optimal configured compensation point of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula; ensuring and avoiding the capacity of the 10 kV parallel reactor configuration of the upper limit of the node voltage of a trunk line, and ensuring the capacity of a single unit and the number of configured groups of the 10 kV parallel reactor by a reference of a rule that a voltage regulating effect of reactive compensation equipment of a single group of a transformer substation does not exceed 2.5% of the rated voltage; and monitoring the node voltage of the trunk line including the small hydro in real time, and controlling the switching of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula.

The present invention discloses a day-ahead optimal scheduling method for incremental power distribution network with high permeability distributed photovoltaic. The method comprises following steps:constructing an incremental distribution network day-ahead optimization model according to a incremental distribution network model, the optimization model includes a running cost objective function and constraint conditions: using the constructed incremental distribution network day-ahead optimization model and taking minimization of the objective function as a target to optimize the incrementaldistribution network; the day-ahead optimal scheduling method for incremental distribution network with high permeability distributed photovoltaic has following advantages: comprehensively consideringtechnologies of a photovoltaic converter RPC, a power distribution station SVC, an OLTC tap action and a user side ESS charge and discharge control methods, considering superiority of the distributedphotovoltaic in the incremental distribution network and user side energy storage complementary power supply, establishing a quadratic constrained quadratic QCQP optimization model based on a branchpower flow model BFM. The control method is more comprehensive and can obtain a scheduling plan with a smaller day-ahead running cost and achieve the desired voltage regulation effect.

The invention relates to a method for controlling the small disturbance voltage stability of a microgrid system. The microgrid system controlled by the method comprises a photovoltaic power source, adiesel generator and a DFIG that are connected to one end of a 10kV bus. The control method includes the following steps of: 1) state variable acquisition, including the acquisition of a photovoltaicpower source state variable, the acquisition of a diesel generator state variable, and the acquisition of a DFIG state variable; 2) characteristic value calculation including combining the photovoltaic power source state variable, the diesel generator state variable, and the DFIG state variable to construct a system state space model and to obtain the characteristic value of a system state matrix;3) specific parameter determination including combining the acquired characteristic value and the change trend of a voltage dynamic response curve at a PCC point, and determining the specific parameter affecting the small disturbance voltage stability; and 4) voltage control including improving the specific parameter to improve the small disturbance voltage stability. Compared with the prior art,the method is simple and visual, reduced in cost, and high in control efficiency.

A pressure stabilizer for the molten material extruded out by screw extruder is characterized by that a connecting body with pressure stabilizing hole on its side wall is arranged between the cylinder and head piece of extruder, and a pressure stabilizing part driven by its driver moves in said pressure stabilizing hole to apply or release the pressure to or from the extruded material which flows through the central channel of said connecting body. Its method includes sensing the pressure value of the extruded material, comparing it with its setting, and controlling the movement of said pressure stabilizing part.

The invention relates to a capillary pressure regulator with stable pressure-regulating performance. The capillary pressure regulator is characterized by comprising an upstream shell, a downstream shell, a baffle, a flat support, a T-shaped pressure-regulating component and a pressure-regulating spring, wherein the upstream shell comprises a first cylindrical section, a conical diffusion section and a second cylindrical section which are sequentially and integrally arranged; the downstream shell comprises a third cylindrical section and a fourth cylindrical section which are integrally arranged; the third cylindrical section is connected with the second cylindrical section; a plurality of gas ports are formed in the circumferential direction of the third cylindrical section at intervals; the baffle comprises a first rounded body and a cylindrical structure; the middle of the first rounded body is provided with a through cylindrical structure and an impermeable central hole; a plurality of water inlet holes which are communicated with the central hole are formed in the circumferential direction of the cylindrical structure; the first rounded body is arranged in the second cylindrical section; the cylindrical structure stretches into the conical diffusion section; the flat support is arranged in the second cylindrical section; the middle of the flat support is provided with a round hole of which the diameter is the same as that of the central hole of the baffle; the T-shaped pressure-regulating component comprises a second rounded body and a cylinder; the cylinder penetrates through the round hole on the flat tray and the central hole on the first rounded hole; and the pressure-regulating spring is sleeved on the cylinder of the T-shaped pressure-regulating component.

The embodiment of the invention provides a control method and device of a two-way electromagnetic force control valve for common rail flow control. The method comprises the steps that real-time commonrail oil pressure of a common rail system is obtained; common rail differential pressure is obtained according to the real-time common rail oil pressure of the common rail system and target oil pressure of the common rail system; the duty ratio of a direction signal, a driving signal and a pulse width modulation signal is calculated according to the common rail differential pressure; and the corresponding direction signal, driving signal and pulse width modulation signal are output to a bidirectional current controller according to the electrical level state of the direction signal, the electrical level state of the driving signal and the duty ratio of the pulse width modulation signal, and are used for generating a corresponding driving current in the bidirectional current controller, sothat a sliding valve core of the two-way electromagnetic force control valve is driven by the driving current to slide. The control method and device of the two-way electromagnetic force control valve for the common rail flow control can achieve fast and accurate adjustment of the common rail pressure of the high pressure common rail oil supply system.

The invention relates to a capillary pressure regulator. The capillary pressure regulator is characterized by comprising an upstream flow deflector, a downstream shell, a pressure regulating assembly and a spring, wherein a baffle for dividing interior of the upstream flow deflector into an upper cavity and a lower cavity which are not communicated with each other is arranged inside the upstream flow deflector; a water outlet hole is formed in the upper cavity; an air guiding pipe communicated with atmosphere is arranged on the lower cavity; a plurality of vent holes are also formed in the lower cavity; the downstream shell comprises a first cylinder body and a second cylinder body; the end part of the first cylinder body is connected with a shell connecting end of the upstream flow deflector; a plurality of positioning holes are formed in the side wall of the first cylinder body; the pressure regulating assembly is a cylindrical cavity with one opened side and one closed side; an outwardly-protruding spring installing groove is formed in the inner wall of a closed end; a positioning probe corresponding to the positioning holes is arranged on the outer wall of the closed end; the opened end of the pressure regulating assembly is connected with a pressure regulating assembly connecting end of the upstream flow deflector; a water stopping part is arranged between the opened end of the pressure regulating assembly and the pressure regulating assembly connecting end of the upstream flow deflector; and one end of the spring is pressed against the baffle inside the upstream flow deflector; and the other end of the spring is pressed against the bottom of the spring installing groove of the pressure regulating assembly.

The invention relates to a dynamic voltage-adjustment reactive compensation technology, in particular to a variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method includes the steps of setting a series-parallel connection assembly for a variable electric reactor and a capacitor and connecting the series-parallel connection assembly into a load side inlet; detecting the voltage offset and operation conditions of the outlet end and the power factor of the inlet end of the assembly in real time; dynamically controlling the parameters of the variable electric reactor and the capacitor in series-parallel connection according to the voltage offset and operation conditions of the load side and the power factor on a power grid side, and enabling the voltage on the load side to reach the standard and the power factor on the power grid side to be improved. The variable series-connection reactance dynamic voltage-adjustment reactive compensation device comprises a series-parallel connection unit for the variable electric reactor and the capacitor, a load voltage offset and power grid reactive vacancy detection unit, a dynamic voltage-adjustment and reactive power compensation control unit, a dynamic voltage-adjustment and reactive power compensation execution unit and an element and device protecting unit. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device can be used for controlling low voltage, improving electricity quality, reducing losses, saving energy and improving power supply reliability and electricity utilization rate, and have the advantages of being safe, being environmentally friendly, saving energy and increasing the effect.

The invention relates to the technical field of bulldozers, in particular to an electric-hydraulic cooperative control type speed changing system for a bulldozer. The electric-hydraulic cooperative control type speed changing system for the bulldozer comprises a hydraulic control handle. A button used for controlling a speed gear electromagnetic valve to be powered on or powered off is arranged on the hydraulic control handle, and by powering on or powering off the speed gear electromagnetic valve, pilot oil is made to enter different oil ports of a speed gear control device, a valve element of the speed gear control device moves to the corresponding gear under the effect of oil pressure, and thus speed gear switching is achieved; and a valve element of a direction gear control device is controlled to move to the corresponding position by controlling oil entering the direction gear control device through the hydraulic control handle, and thus direction gear switching is achieved. According to the electric-hydraulic cooperative control type speed changing system for the bulldozer, the advantages of simple structure and good pressure regulating performance of mechanical speed valves and direction valves are reserved, impact in the gear shifting process of the whole bulldozer is reduced through an operating way based on cooperation of electric control and hydraulic control, and the operating comfort is improved; and meanwhile, cost is greatly reduced, and the market competitiveness of products is improved.

Environment-friendly reclaimed rubber extruding equipment belongs to the technical field of rubber equipment and comprises a motor, a reduction gearbox, a feed hopper, a feeding section, a plasticization recovery device, a plurality of gas bleed valves, a waste recovering device, a connecting pipe, a filter, a cooler, a squeezer, a discharging device, a tractor and a base; the motor, the reduction gearbox and the waste recovering device are mounted on the base; the motor is connected with the reduction gearbox; the reduction gearbox is connected with the feeding section; the feed hopper is arranged on the feeding section; the right end of the feeding section is connected with the plasticization recovery device; the gas bleed valves are arranged on the plasticization recovery device; the gas bleed valves are mutually connected through connecting pipes and enter the waste recovering device; the filter is mounted at the right end of the plasticization recovery device; the cooler is mounted at the right end of the filter; the squeezer is mounted at the right end of the cooler; the discharging device is mounted at the right end of the squeezer; the environment-friendly reclaimed rubber extruding equipment adopts a self adjusting and cleaning structure, the pressure adjusting performance is good, products produced are good in toughness, the breakage resisting performance is good, and the environment-friendly reclaimed rubber extruding equipment gains good reputation from customers.

The invention relates to a coordinated control method for multistage reactive voltage in an active distribution network. The control method comprises the steps of grading voltage regulation resources in the active distribution network, executing four stages of voltage regulation in sequence from low to high, judging whether the voltage level of the whole network is qualified after each stage of voltage regulation, and when the voltage level of the whole network is qualified, not performing next stage of voltage regulation, wherein the four stages of voltage regulation are respectively first, second, third and fourth ones of a power system realized by using a distributed photovoltaic power supply, reactive power output of a photovoltaic power station, a traditional VQC (Voltage Quality Control) device and active power output of the photovoltaic power station. Compared with the prior art, the control method sufficiently using the scattered voltage regulation resources in the active distribution network has the advantages of effectively reducing the actions of the VQC device, improving the voltage level of the distribution network and the like.

The invention discloses a self-cleaning pressure regulator which comprises a lever and a valve clack. The valve clack can only be movably arranged on a shell. The middle portion of the lever is hinged to the shell. A long slot is formed in one end of the lever. A hinge pin fixedly connected to the upper end of the valve clack is arranged in the long slot in a matched mode. The other end of the lever is movably connected to a drive rod, and the drive rod is connected to a leather bag. A cavity communicating with a pressure-regulated environment is defined by the lower side face of the leather bag and the shell. A tray is fixedly connected to the upper side face of the leather bag, and a spring is arranged on the tray. The spring is pressed by a regulating plug screw which is screwed to the shell. The valve clack is composed of a valve clack head and a valve rod. The valve rod is composed of a first rod section and a second rod section. The first rod section is formed on the valve clack head integrally, one end of the second rod section is connected with the lever, and the middle of the second rod section is in sliding fit with the shell. The other end of the second rod section and the first rod section are hinged through a spherical joint. The self-cleaning pressure regulator has the beneficial effects that the valve clack of the pressure regulator has the self-cleaning function, the pressure regulation effect is good, and performance is reliable.

The invention relates to a reducing valve in the agriculture water-saving irrigation field and discloses an irrigation multifunctional mass-flow reducing valve. The irrigation multifunctional mass-flow reducing valve comprises a valve body, a support plate, a valve rod, a valve core, a valve cap, a base, an opening-closing valve body, a spring positioning piece, a bolt and a spring. In the working state, when the upstream pressure is instable, under the actions of spring force and water pressure, the valve rod and the valve core can move up and down in the axial direction to regulate the current cross section, then different head losses of localities are caused, and the function of stabilizing the downstream pressure is achieved. According to the irrigation multifunctional mass-flow reducing valve, a throttling port is perpendicular to the water flowing direction, and the pass flow is large; the lowest end of the valve body is provided with the opening-closing valve body, through the adjustment of the opening-closing valve body, the valve core can be closely attached to the wall face of the lower side of the throttling port, and the function of closing the valve is achieved. The irrigation multifunctional mass-flow reducing valve has the advantages that the pass flow is large, the adjusting range is wide, the pressure adjusting effect is good, the assembly is convenient, and the irrigation uniformity can be greatly improved if the irrigation multifunctional mass-flow reducing valve is applied to the agriculture irrigation system; meanwhile, the delicate design of the opening-closing valve body can omit an opening-closing valve body in a pipeline, and the investment is reduced.

The invention relates to a dynamic voltage-adjustment reactive compensation technology, in particular to a variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method includes the steps of setting a series-parallel connection assembly for a variable electric reactor and a capacitor and connecting the series-parallel connection assembly into a load side inlet; detecting the voltage offset and operation conditions of the outlet end and the power factor of the inlet end of the assembly in real time; dynamically controlling the parameters of the variable electric reactor and the capacitor in series-parallel connection according to the voltage offset and operation conditions of the load side and the power factor on a power grid side, and enabling the voltage on the load side to reach the standard and the power factor on the power grid side to be improved. The variable series-connection reactance dynamic voltage-adjustment reactive compensation device comprises a series-parallel connection unit for the variable electric reactor and the capacitor, a load voltage offset and power grid reactive vacancy detection unit, a dynamic voltage-adjustment and reactive power compensation control unit, a dynamic voltage-adjustment and reactive power compensation execution unit and an element and device protecting unit. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device can be used for controlling low voltage, improving electricity quality, reducing losses, saving energy and improving power supply reliability and electricity utilization rate, and have the advantages of being safe, being environmentally friendly, saving energy and increasing the effect.

The invention provides an automatic decompression device of rubber extruding equipment, belonging to the technical field of rubber equipment. The automatic decompression device comprises an extruding machine barrel, a sealing door, a rotating rod, a first memory resilient sheet, a first heating pipe, magnetic nut blocks, a pressure ball, magnetic slide sheets, a screw rod, a shell, stepping motors, a connector, a bottom groove, a draught fan, a chopping machine, a pull rod, an air door, a second memory spring, a second heating pipe, gears, gear blocks, a fixing rod, a fixing seat, a screw rod, adjusting mechanisms, connecting rods, scraping blocks and a spring, wherein a sealing door is arranged at an opening of the lower end of the extruding machine barrel and is connected with one end of the rotating rod; the other end of the rotating rod is connected with the first memory resilient sheet; the first memory resilient sheet is sleeved by the first heating pipe; the shell is arranged under the sealing door and the magnetic nut blocks are arranged on the outer side of the shell; the magnetic slide sheets are arranged on the inner side of the shell; and the magnetic nut blocks are connected with the screw rod. The automatic decompression device adopts a self-adjustable cleaning structure and has good pressure adjusting performance and long service life; and regenerated rubber equipment can work stably.

The invention provides an automatic decompression device of rubber extruding equipment, belonging to the technical field of rubber equipment. The automatic decompression device comprises an extruding machine barrel, a sealing door, a rotating rod, a first memory resilient sheet, a first heating pipe, magnetic nut blocks, a pressure ball, magnetic slide sheets, a screw rod, a shell, stepping motors, a connector, a bottom groove, a draught fan, a chopping machine, a pull rod, an air door, a second memory spring, a second heating pipe, gears, gear blocks, a fixing rod, a fixing seat, a screw rod, adjusting mechanisms, connecting rods, scraping blocks and a spring, wherein a sealing door is arranged at an opening of the lower end of the extruding machine barrel and is connected with one end of the rotating rod; the other end of the rotating rod is connected with the first memory resilient sheet; the first memory resilient sheet is sleeved by the first heating pipe; the shell is arranged under the sealing door and the magnetic nut blocks are arranged on the outer side of the shell; the magnetic slide sheets are arranged on the inner side of the shell; and the magnetic nut blocks are connected with the screw rod. The automatic decompression device adopts a self-adjustable cleaning structure and has good pressure adjusting performance and long service life; and regenerated rubber equipment can work stably.

The invention discloses a calender for PVC film production. The calender comprises a box body, second fixing rods are arranged on the inner walls of the top and the bottom of the box body correspondingly, a first connecting plate is arranged on the outer wall of one side of each second fixing rod, an electric push rod is inserted into the outer wall of the top of each first connecting plate, and asliding block is arranged on the outer wall of one end of each electric push rod; and a sliding groove is formed in the outer wall of one side of each second fixing rod. According to the calender, when people carry out calendering work on a PVC film, the electric push rods can be started, the electric push rods drive first pressing rollers and second pressing rollers to do face-to-face or back-to-back movement so as to adjust the pressure borne by the PVC film, and the calendering degree of the PVC film can be adjusted; and meanwhile, the cross sections of the tops of the first pressing rollers are in arc shapes, the cross sections of the bottoms of the first pressing rollers are linear, the radian of the arc shapes ranges from 1 degree to 5 degrees, and the situation that in the calendering process of the PVC film, the PVC film diffuses from the middle to the two sides, and consequently the middle of the PVC film is thin and the two sides of the PVC film are thick can be avoided.

The invention relates to a reducing valve in the agriculture water-saving irrigation field and discloses an irrigation multifunctional mass-flow reducing valve. The irrigation multifunctional mass-flow reducing valve comprises a valve body, a support plate, a valve rod, a valve core, a valve cap, a base, an opening-closing valve body, a spring positioning piece, a bolt and a spring. In the working state, when the upstream pressure is instable, under the actions of spring force and water pressure, the valve rod and the valve core can move up and down in the axial direction to regulate the current cross section, then different head losses of localities are caused, and the function of stabilizing the downstream pressure is achieved. According to the irrigation multifunctional mass-flow reducing valve, a throttling port is perpendicular to the water flowing direction, and the pass flow is large; the lowest end of the valve body is provided with the opening-closing valve body, through the adjustment of the opening-closing valve body, the valve core can be closely attached to the wall face of the lower side of the throttling port, and the function of closing the valve is achieved. The irrigation multifunctional mass-flow reducing valve has the advantages that the pass flow is large, the adjusting range is wide, the pressure adjusting effect is good, the assembly is convenient, and the irrigation uniformity can be greatly improved if the irrigation multifunctional mass-flow reducing valve is applied to the agriculture irrigation system; meanwhile, the delicate design of the opening-closing valve body can omit an opening-closing valve body in a pipeline, and the investment is reduced.

The invention relates to the technical field of natural gas pipeline conveying equipment, in particular to a natural gas self-standing pressure regulator which can be widely applied to a door station, a distribution station and a pressure regulating metering station of a natural gas supply system. The natural gas self-standing pressure regulator comprises a director, a throttle needle valve and a main pressure regulator body; the main pressure regulator body is arranged on a natural gas pipeline to divide the natural gas pipeline into an inlet pipeline body and an outlet pipeline body; and a connecting pipe is connected among the director, the throttle needle valve, the main pressure regulator body, the inlet pipeline body and the outlet pipeline body. The natural gas self-standing pressure regulator has the advantages of being small in size, light, reliable in performance, convenient to mount, high in sensitivity, good in pressure regulating performance and the like; and due to the fact that air flow does not directly impact a thin film, the thin film is not prone to being damaged and is long in service life.

The invention discloses a pressure adjusting assembly for a natural gas pipeline. The pressure adjusting assembly for the natural gas pipeline comprises a stop valve, a pressure adjustor and a valve port communicating with a front pressure adjusting section and a back pressure adjusting section. A stop valve element of the stop valve is connected with a locking mechanism which is unlocked through gas pressure after pressure adjustment. The stop valve element forms blockage pressure through a stop drive spring. The pressure adjuster is provided with a main valve element driven by a primary self-balancing structure, and the main valve element is only movably arranged on a shell of the pressure adjustor. The lower end of the main valve element is connected with a secondary self-balancing auxiliary valve element assembly. The auxiliary valve element assembly comprises an outer cylinder and an inner cylinder. A leather bag is arranged on the lower end face of the inner cylinder. A T-shaped auxiliary valve element is arranged in the middle of the inner cylinder in a penetrating manner. The upper end of the T-shaped auxiliary valve element abuts against the main valve element in a connected manner. The T-shaped auxiliary valve element forms a secondary self-balancing structure through the leather bag and a compression spring. The pressure adjusting assembly for the natural gas pipeline has the beneficial effects that the pressure adjustor forms the double self-balancing pressure adjusting structures which are mutually superposed; and the stop valve is of a purely mechanical structure, and therefore potential safety hazards caused by sparks are avoided.

The invention provides an optimal configuration of a 10 kV power distribution network parallel reactor and a compensation method of the 10 kV power distribution network parallel reactor. The optimal configuration of the 10 kV power distribution network parallel reactor and the compensation method of the 10 kV power distribution network parallel reactor are used for solving the problem that inductive reactive power optimal allocation of resources of insertion of small hydro to power distribution network and controlling switching of the reactive power compensation. The compensation method of the 10 kV power distribution network parallel reactor comprises the following steps: obtaining a voltage drop reactive decoupling formula by means of a decoupling deduction of the voltage drop formula; ensuring reactive decoupling coefficient according to the line reactance per kilometer and the line voltage reference; ensuring an optimal configured compensation point of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula; ensuring and avoiding the capacity of the 10 kV parallel reactor configuration of the upper limit of the node voltage of a trunk line, and ensuring the capacity of a single unit and the number of configured groups of the 10 kV parallel reactor by a reference of a rule that a voltage regulating effect of reactive compensation equipment of a single group of a transformer substation does not exceed 2.5% of the rated voltage; and monitoring the node voltage of the trunk line including the small hydro in real time, and controlling the switching of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula.

The invention relates to a capillary pressure regulator. The capillary pressure regulator is characterized by comprising an upstream flow deflector, a downstream shell, a pressure regulating assembly and a spring, wherein a baffle for dividing interior of the upstream flow deflector into an upper cavity and a lower cavity which are not communicated with each other is arranged inside the upstream flow deflector; a water outlet hole is formed in the upper cavity; an air guiding pipe communicated with atmosphere is arranged on the lower cavity; a plurality of vent holes are also formed in the lower cavity; the downstream shell comprises a first cylinder body and a second cylinder body; the end part of the first cylinder body is connected with a shell connecting end of the upstream flow deflector; a plurality of positioning holes are formed in the side wall of the first cylinder body; the pressure regulating assembly is a cylindrical cavity with one opened side and one closed side; an outwardly-protruding spring installing groove is formed in the inner wall of a closed end; a positioning probe corresponding to the positioning holes is arranged on the outer wall of the closed end; the opened end of the pressure regulating assembly is connected with a pressure regulating assembly connecting end of the upstream flow deflector; a water stopping part is arranged between the opened end of the pressure regulating assembly and the pressure regulating assembly connecting end of the upstream flow deflector; and one end of the spring is pressed against the baffle inside the upstream flow deflector; and the other end of the spring is pressed against the bottom of the spring installing groove of the pressure regulating assembly.

The invention relates to a capillary pressure regulator with stable pressure-regulating performance. The capillary pressure regulator is characterized by comprising an upstream shell, a downstream shell, a baffle, a flat support, a T-shaped pressure-regulating component and a pressure-regulating spring, wherein the upstream shell comprises a first cylindrical section, a conical diffusion section and a second cylindrical section which are sequentially and integrally arranged; the downstream shell comprises a third cylindrical section and a fourth cylindrical section which are integrally arranged; the third cylindrical section is connected with the second cylindrical section; a plurality of gas ports are formed in the circumferential direction of the third cylindrical section at intervals; the baffle comprises a first rounded body and a cylindrical structure; the middle of the first rounded body is provided with a through cylindrical structure and an impermeable central hole; a plurality of water inlet holes which are communicated with the central hole are formed in the circumferential direction of the cylindrical structure; the first rounded body is arranged in the second cylindrical section; the cylindrical structure stretches into the conical diffusion section; the flat support is arranged in the second cylindrical section; the middle of the flat support is provided with a round hole of which the diameter is the same as that of the central hole of the baffle; the T-shaped pressure-regulating component comprises a second rounded body and a cylinder; the cylinder penetrates through the round hole on the flat tray and the central hole on the first rounded hole; and the pressure-regulating spring is sleeved on the cylinder of the T-shaped pressure-regulating component.

Environmentally friendly reclaimed rubber extrusion equipment belongs to the technical field of rubber equipment, including motors, gearboxes, hoppers, feeding sections, plasticizing recovery devices, vent valves, waste recovery devices, connecting pipes, filters, coolers, extrusion device, discharger, tractor and base; a motor, a reduction box and a waste recovery device are installed on the base, the motor is connected to the reduction box, the reduction box is connected to the feeding section, and the feeding section is equipped with The feeding hopper, the right end of the feeding section is connected to the plasticizing recovery device, and there are multiple air release valves on the plasticizing recovery device. A cooler is installed at the right end of the cooler, an extruder is installed at the right end of the cooler, and a discharger is installed at the right end of the extruder; the device adopts a self-regulating cleaning structure, which has good pressure regulation performance, and at the same time, the produced products have good toughness and fracture resistance Good performance.

The invention discloses an oxygenerator, which includes: a machine body; a cover body, which is arranged on the machine body, and is equipped with a pressure regulating valve installation part and an air inlet hole and an air outlet hole that are communicated with the pressure regulating valve installation part; a pressure regulating valve assembly, which is arranged in the pressure regulating valve installation part. According to the oxygenator of the embodiment involved in the invention, by designing the assembly as part of the oxygenator main body, the volume of the pressure regulating valve can be effectively reduced, energy loss on a gas route is avoided, and the efficiency of the oxygenator is improved. Also, the oxygenator with the structure has the characteristics of convenient pressure regulation, stable gas flow and good pressure regulating effect, prolongs the service life of the pressure regulating valve, improves the quality of the pressure regulating valve, and also improves the quality of the oxygenerator.

The invention relates to a nuclear power island center reheat steam main-flow-control-valve valve element. The nuclear power island center reheat steam main-flow-control-valve valve element comprisesa labyrinth seat, a plurality of labyrinth discs and a labyrinth close cover. A circular groove is formed in the middle of the bottom of the labyrinth seat, the top of the labyrinth close cover extends into the circular groove of the labyrinth seat and is fixedly connected with the labyrinth seat, and a plurality of round holes are evenly formed in the side wall of the labyrinth close cover. Ringprotrusions are arranged at the bottom of the labyrinth close cover, the multiple labyrinth discs are installed on the labyrinth close cover in a sleeving mode, the labyrinth discs are in rotational contact with the labyrinth close cover, the labyrinth discs are supported on the ring protrusions, and the uppermost one of the labyrinth discs is in clearance contact with the labyrinth seat. A plurality of turbine structures are evenly arranged on the labyrinth discs, and the multiple labyrinth discs are stacked to jointly form a labyrinth structure. A sealing surface is arranged on the outer peripheral surface of the labyrinth seat so as to form the sealing surface of the valve element. The design is reasonable, the structure is simple, the rotary labyrinth disc design is adopted, pressure regulating and flow stabilizing are carried out on a medium by using the rotation of the labyrinth discs, and the pressure regulating effect is good.

The invention discloses a pressure adjusting assembly for a natural gas pipeline. The pressure adjusting assembly for the natural gas pipeline comprises a stop valve, a pressure adjustor and a valve port communicating with a front pressure adjusting section and a back pressure adjusting section. A stop valve element of the stop valve is connected with a locking mechanism which is unlocked through gas pressure after pressure adjustment. The stop valve element forms blockage pressure through a stop drive spring. The pressure adjuster is provided with a main valve element driven by a primary self-balancing structure, and the main valve element is only movably arranged on a shell of the pressure adjustor. The lower end of the main valve element is connected with a secondary self-balancing auxiliary valve element assembly. The auxiliary valve element assembly comprises an outer cylinder and an inner cylinder. A leather bag is arranged on the lower end face of the inner cylinder. A T-shaped auxiliary valve element is arranged in the middle of the inner cylinder in a penetrating manner. The upper end of the T-shaped auxiliary valve element abuts against the main valve element in a connected manner. The T-shaped auxiliary valve element forms a secondary self-balancing structure through the leather bag and a compression spring. The pressure adjusting assembly for the natural gas pipeline has the beneficial effects that the pressure adjustor forms the double self-balancing pressure adjusting structures which are mutually superposed; and the stop valve is of a purely mechanical structure, and therefore potential safety hazards caused by sparks are avoided.

The invention relates to the technical field of bulldozers, in particular to an electric-hydraulic cooperative control type speed changing system for a bulldozer. The electric-hydraulic cooperative control type speed changing system for the bulldozer comprises a hydraulic control handle. A button used for controlling a speed gear electromagnetic valve to be powered on or powered off is arranged on the hydraulic control handle, and by powering on or powering off the speed gear electromagnetic valve, pilot oil is made to enter different oil ports of a speed gear control device, a valve element of the speed gear control device moves to the corresponding gear under the effect of oil pressure, and thus speed gear switching is achieved; and a valve element of a direction gear control device is controlled to move to the corresponding position by controlling oil entering the direction gear control device through the hydraulic control handle, and thus direction gear switching is achieved. According to the electric-hydraulic cooperative control type speed changing system for the bulldozer, the advantages of simple structure and good pressure regulating performance of mechanical speed valves and direction valves are reserved, impact in the gear shifting process of the whole bulldozer is reduced through an operating way based on cooperation of electric control and hydraulic control, and the operating comfort is improved; and meanwhile, cost is greatly reduced, and the market competitiveness of products is improved.

The invention relates to a hollow billet inlet pressure adjuster in the field of agricultural water-saving irrigation. The hollow billet inlet pressure adjuster is characterized by comprising an upstream flow guide body, a downstream shell, a pressure adjusting component and a spring. A baffle separating the interior of the upstream flow guide body into an upper cavity and a lower cavity is disposed inside the upstream flow guide body. The peripheral outer wall of the upper cavity is provided with water outlets. An air guide pipe communicating the lower cavity and atmosphere is disposed inside the upper cavity. The middle portion of the upstream flow guide body is connected with the downstream shell. The end of the upstream flow guide body is connected with the pressure adjusting component in a sealed manner. The downstream shell comprises a first cylinder and a second cylinder. U-shaped guide grooves are formed in the peripheral inner wall of the first cylinder. The end of the second cylinder is used as a water outlet end. Guide columns are disposed on the peripheral outer wall of the pressure adjusting component and embedded into the U-shaped guide grooves of the downstream shell. The spring is mounted in the space formed by the upstream flow guide body and the pressure adjusting component. The pressure adjuster mounted on the inlet of hollow billet is low in adjusting starting pressure, wide in adjusting range, good in pressure adjusting pressure, simple in structure, suitable for being popularized widely, and capable of greatly increasing irrigation evenness.

The embodiment of the invention provides a control method and device of a two-way electromagnetic force control valve for common rail flow control. The method comprises the steps that real-time commonrail oil pressure of a common rail system is obtained; common rail differential pressure is obtained according to the real-time common rail oil pressure of the common rail system and target oil pressure of the common rail system; the duty ratio of a direction signal, a driving signal and a pulse width modulation signal is calculated according to the common rail differential pressure; and the corresponding direction signal, driving signal and pulse width modulation signal are output to a bidirectional current controller according to the electrical level state of the direction signal, the electrical level state of the driving signal and the duty ratio of the pulse width modulation signal, and are used for generating a corresponding driving current in the bidirectional current controller, sothat a sliding valve core of the two-way electromagnetic force control valve is driven by the driving current to slide. The control method and device of the two-way electromagnetic force control valve for the common rail flow control can achieve fast and accurate adjustment of the common rail pressure of the high pressure common rail oil supply system.