41results about How to "Guaranteed pressure value" patented technology

The invention discloses an operation control method for a multi-split air conditioner. The operation control method for the multi-split air conditioner includes the following steps that when an outdoor unit is started, a compressor is controlled to operate for a first preset time period according to the initial frequency; a first pressure value of refrigerant pressure at the high-pressure side of the air conditioner is detected within the first preset time period; whether frequency increase of the compressor is needed or not is judged according to the first pressure value; and when frequency increase of the compressor is needed, the frequency of the compressor of the outdoor unit is increased, so that the refrigerant pressure at the high-pressure side of the air conditioner is increased before reversing of a four-way valve. The invention further discloses an operation control device for the multi-split air conditioner. By means of the method and device, the reliability of operation of the multi-split air conditioner is improved.

The invention provides an ultrasonic rolling technique. The ultrasonic rolling technique comprises step as follows: an ultrasonic rolling processing device adaptive to a complicated surface is provided and comprises a casing assembly, a hydraulic assembly and an ultrasonic assembly, wherein the ultrasonic assembly is fixed in the casing assembly and connected with the hydraulic assembly, the ultrasonic assembly comprises a transducer, an amplitude-change pole and a tool head, the transducer is connected with an ultrasonic generator, two edge curves of a radial section of the amplitude-change pole are bezier curves, a first end of the amplitude-change pole is connected to a first end of the transducer, and the tool head is detachably connected to a second end of the amplitude-change pole; the ultrasonic rolling processing device is clamped to a machine tool, and the tool head is arranged in the position in slight contact with a to-be-processed surface of a workpiece; the hydraulic assembly is adjusted to output 100-2,000 N static pressure; the ultrasonic assembly is adjusted, and axial amplitude of an output end of the amplitude-change pole is enabled to be 5-30 mu m; meanwhile, a motion trail of the machine tool is set for ultrasonic rolling processing. The ultrasonic rolling technique has the advantages of high efficiency, low energy loss and the like.

The invention provides an ultrasonic roll finishing device adaptable to complex surfaces. The ultrasonic roll finishing device adaptable to complex surfaces comprises a shell assembly, a hydraulic assembly and an ultrasonic assembly. The ultrasonic assembly is fixed in the shell assembly and comprises a transducer, an amplitude transformer and a tool head, wherein the transducer is connected with an ultrasonic generator; the first end of the amplitude transformer is connected to the first end of the transducer, and two edge curves of the radial section of the amplitude transformer are Bezier curves; and the tool head is detachably connected to the second end of the amplitude transformer. By adoption of the ultrasonic roll finishing device adaptable to complex surfaces, the probability of movement failures caused by environment changes or self faults can be lowered and even prevented; and the ultrasonic roll finishing device adaptable to complex surfaces has the advantages of being high in efficiency, small in energy loss, small in size, long in service life, good in heat dissipation performance, high in flexibility, good in universality and low in weight.

The invention provides a novel sprinkling device with a microbubble device for a vegetable greenhouse. The novel sprinkling device includes a water inlet pipe, a pressure box, a connection water pipe, a transition water tank, a spraying pipe, a water pump, spraying nozzles, an air compressor, a pipe head, an air spraying pipe, a pressure gage, a water level meter, an air pipe, a control valve, an oxygen outlet pipe, and an oxygenator; the water inlet pipe is arranged on a left central part of the pressure box; the transition water tank is connected to and arranged on the right side of the pressure box through the connection water pipe; and the spraying pipe is connected to and arranged on the right side of the transition water tank. According to the invention, the pressure box, the air compressor, the air spraying pipe, the pressure gage, the water level meter, the control valve and the oxygenator are arranged on the novel sprinkling device, bubbles can be easily smashed into micro-nano bubbles, the micro-nano bubbles are evenly fused with a sprinkling liquid, the oxygen content of the micro-nano bubbles can be improved, starting and stopping of the air compressor can be intelligently controlled, the pressure value of the pressure box can be kept in a rated range, the planting technique demands of the vegetable greenhouse can be met, and the quality of vegetables can be improved.

The invention discloses an automatic low-pressure protection system for a coke oven gas pipeline and belongs to the technical field of coke oven gas supply in the metallurgy industry. The automatic low-pressure protection system comprises three groups of pressure detection switches arranged on a gas transporting pipeline, wherein each group of pressure detection switches comprises a low-pressure detection switch and a high-pressure detection switch; a nitrogen gas transporting pipeline is connected onto the gas transporting pipeline positioned at a coke oven gas outlet of a coke oven; an electropneumatic valve is arranged on the nitrogen gas transporting pipeline and is connected with the output end of a field PLC (Programmable Logic Controller); and the pressure detection switches are connected with the input end of the field PLC. The automatic low-pressure protection system disclosed by the invention has the benefits that the pressure detection switches are arranged on the gas transporting pipeline so as to realize real-time monitoring of a pressure signal; and the electropneumatic valve is opened and closed and the nitrogen gas transporting pipeline is communicated and closed by the field PLC, and therefore, the pressure value in the nitrogen gas transporting pipeline is enabled to be positioned within safety range and gas back flow accidents are effectively avoided.

The invention discloses an aluminum oxide air compressor linkage air transmission device applied to lithium battery diaphragms and a linkage method thereof and belongs to the technical field of transmission of aluminum oxide. The aluminum oxide air compressor linkage air transmission device comprises an air supply device, a conveying pipeline and a storage bin, wherein the air supply device is connected with the storage bin through the conveying pipeline; a feeding device is arranged on the conveying pipeline; the feeding device comprises a feeding bin; a feeding pipe is arranged at the bottomof the feeding bin; the feeding pipe is communicated with the conveying pipeline; a feeding valve is arranged on the feeding pipe; the air supply device is connected with the controller and comprisesa plurality of air compressors which are connected with one end of a first pipeline; the other end of the first pipeline is communicated with a compressed air tank; a pressure sensor is arranged in the compressed air tank and is connected with a controller; the controller is connected with an alarm; and an air outlet pipe is arranged on the compressed air tank and is communicated with the conveying pipeline.

The invention relates to an accurate shape control method and device used after sterilization of infusion type products and belongs to the technical field of medical equipment. The method comprises the steps as follows: (1) setting temperature and pressure of a sterilization heating stage and a sterilization cooling stage at stages; and (2) corresponding to each stage, setting initial temperatureT initial and final temperature T final, setting initial pressure P initial and final pressure P final, setting temperature change rate delta T and controlling temperature change, wherein the relationbetween the pressure PX and instant temperature TX required in the stage is shown in the description; and detecting actual pressure P actual in a cavity of a sterilizer and enabling P actual to approach PX by a pressure control method. By the aid of the sterilization heating stage and the sterilization cooling stage, the temperature change rate can be controlled accurately, the pressure can be adjusted accurately, pressure inside and outside a product can be kept balanced, and the good shape of the product can be kept.

The invention provides a full-automatic constant-temperature and constant-pressure soil permeameter. The full-automatic constant-temperature and constant-pressure soil permeameter comprises a workingplatform, a boosting water pump, a measuring cylinder, a test sample container, a control platform and a water tank, wherein the water tank is arranged in the working platform; the water tank is connected with the boosting water pump at one side; the test sample container is arranged at the upper end of the working platform; the measuring cylinder is mounted at one side of the test sample container and the control platform is arranged at the other side of the test sample container; a water taking opening is formed in the test sample container; the water taking opening is matched with the measuring cylinder; the control platform is provided with a pressure controller, a temperature controller and a water flowing valve; the test sample container is connected with the boosting water pump through a water inlet pipe. According to the permeameter provided by the invention, the pressure controller is matched with the temperature controller, so that the temperature of water in the water tank and the pressure value of the boosting water pump can be ensured, and a data range of a penetration test is effectively enlarged; meanwhile, the penetration test can be carried out only if temperatureand pressure are directly set after the permeameter is mounted, and the permeameter is convenient to operate.

The invention relates to the technical field of chemical material forming processing, in particular to dicyclopentadiene forming equipment and a joint control system thereof. After a product mold is closed, a vacuum extraction valve is opened, air in a cavity of the forming mold is completely extracted, nitrogen is filled, product feed liquid is injected into the cavity of the forming mold, an exhaust control valve is opened to discharge redundant nitrogen, materials in the cavity of the forming mold are fully filled, the feed liquid enters a gas collecting and overflowing pool, and a feed liquid sensor responds, so that a controller body is controlled to stop material injection, after the material injection is finished, a switch valve on the side edge of an exhaust control pipe is closed; an inflation valve is opened, and an inflation pipe is inflated and pressurized, so that the density quality of the product in curing molding is ensured; and finally, the pressure is maintained for 120 seconds, the mold is opened and the product is taken to improve the curing molding process and ensure the quality of the product, so that the production efficiency is improved.

The invention discloses a natural drug extraction device comprising a fixed baseplate; the right side of the upper end surface of the fixed baseplate is fixedly provided with a sealed pot; a high-pressure extraction space is arranged in the sealed pot; an extrusion feeding device is arranged on a middle position of the upper end surface of the sealed pot; a sealing hole is formed in a center position of the upper end wall of the high-pressure extraction space; the left side of the upper end surface of the fixed baseplate is fixedly connected with a solvent storage tank; a filter plate locatedin a horizontal direction is arranged on a middle position of the high-pressure extraction space; a clearing device moving back and forth is arranged at the front side of the upper end of the filter plate; a drug residue tank is arranged at the lower end of the rear end surface of the sealed pot; and a drug discharging pipe is arranged at the lower side of the right end surface of the sealed pot.When the natural drug extraction device works, a drug is extruded and pushed to smash an organizational structure of the drug in a descending process, so that effective components are conveniently extracted by using a solvent; and the work of clearing drug residues is automatically finished, so that the labor intensity can be lowered, and the labor cost can be reduced.

The invention provides an automobile windscreen wiper. A plurality of runner pipes (3) are arranged in a wiper arm (1) and a wiper blade (2); one end of each runner pipe (3) is connected with an air pump; the other end is branched into two branch pipes; a plurality of grid pipes are vertically and uniformly arranged on the branch pipes; the branch pipes and the plurality of grid pipes are integrally connected to form an isosceles triangle; an end part of each grid pipe is an inverted conical nozzle; the inverted conical nozzle is formed by sequentially connecting an inverted conical surface, acylindrical surface and an arc surface; and a trapezoidal groove is arranged in the wiper blade (2), a top of the trapezoidal groove is connected with the inverted conical nozzle, the inverted conical nozzle is connected with the atmosphere through the trapezoidal groove, a plurality of pressure sensors are arranged on the wiper arm (1), and a telescopic device (4) is arranged between the wiper arm (1) and a driving motor (5) and can control a distance between the wiper arm (1) and a windshield. The windscreen wiper has beneficial effects that after the windscreen wiper senses a hard foreignmatter, the windscreen wiper can automatically or manually leave the windshield and remove the foreign matter, and the foreign matter is prevented from scratching the windshield.

The invention discloses a pediatric negative-pressure gastric lavage device for a pediatric doctor. The pediatric negative-pressure gastric lavage device comprises a gastric lavage head, a gastric tube and a shell. The gastric lavage head is of an elliptical structure and communicated with a gastric tube. The gastric tube comprises an air inlet tube, a liquid inlet tube and a liquid discharge tube. The outer surface of the gastric lavage head is evenly and alternately provided with a liquid inlet, an air inlet and a liquid discharge opening which are communicated with the air inlet tube, the liquid inlet tube and the liquid discharge tube respectively. The other end of the air inlet tube is communicated with an air outlet of a second air pump. According to the pediatric negative-pressure gastric lavage device, by means of the non-water-tank type design, the size of the pediatric negative-pressure gastric lavage device is reduced, and movement is facilitated; by adding a first liquid flow meter, the flowing speed of the discharged liquid can be monitored, the pressure value of the negative pressure in a stomach is ensured, and the injuries of inner organs are avoided; by means of the automatic control, the work difficulty of operators is reduced.

The invention provides a wall-mounted oxygen inhalator. The wall-mounted oxygen inhalator comprises a cup, a float flow meter, an upper connecting piece, a connector and a filtering loop, wherein a lug boss is arranged on the lower end face of the connector; a groove is formed in the lug boss; the bottom of the groove is cone-shaped and an oxygen outlet is formed in the cone-shaped wall; a lug boss is arranged on the upper end of a lower connecting piece and external threads are formed on the lug boss; a first flange and a threaded blind hole are formed at the lower end of the lower connecting piece; internal threads matched with external threads on the lower end of the connector are formed on the upper end of an end cover, and an oxygen pipe connection is formed on the wall of the end cover; external threads are formed on the upper end of an end cap, while a second flange is formed on the lower end of the end cap; a blind hole is formed in the axial direction and an oxygen discharge channel is formed in the lower end of the blind hole. The wall-mounted oxygen inhalator is simple in structure, low in processing technic requirements, compact in structure, and easy to manufacture and assemble.

The invention discloses a pediatric negative-pressure gastric lavage device for a pediatric doctor. The pediatric negative-pressure gastric lavage device comprises a gastric lavage head, a gastric tube and a shell. The gastric lavage head is of an elliptical structure and communicated with a gastric tube. The gastric tube comprises an air inlet tube, a liquid inlet tube and a liquid discharge tube. The outer surface of the gastric lavage head is evenly and alternately provided with a liquid inlet, an air inlet and a liquid discharge opening which are communicated with the air inlet tube, the liquid inlet tube and the liquid discharge tube respectively. The other end of the air inlet tube is communicated with an air outlet of a second air pump. According to the pediatric negative-pressure gastric lavage device, by means of the non-water-tank type design, the size of the pediatric negative-pressure gastric lavage device is reduced, and movement is facilitated; by adding a first liquid flow meter, the flowing speed of the discharged liquid can be monitored, the pressure value of the negative pressure in a stomach is ensured, and the injuries of inner organs are avoided; by means of the automatic control, the work difficulty of operators is reduced.

The invention discloses a wastewater treatment device for a livestock and poultry farm. The wastewater treatment device comprises a fixed plate, a sealed cabinet is fixedly arranged on the right sideof the upper end face of the fixed plate, a wastewater inlet pipe is arranged on the upper end face of the sealed cabinet, a wastewater inlet is formed in the wastewater inlet pipe, a treatment spaceis arranged in the sealed cabinet, a sealing opening is formed in the center of the upper end wall of the treatment space, a medicinal liquor storage cabinet is fixedly connected to the left side of the upper end face of the fixed plate, a horizontal filtering carrier plate is arranged in the center of the treatment space, a sweeping device which moves in the front-and-back direction is arranged on the front side of the upper end of the filtering carrier plate, a waste residue cabinet is arranged at the lower end of the rear end face of the sealed cabinet, and a water outlet pipe is arranged on the lower side of the right end face of the sealed cabinet.

The invention provides a wall-mounted oxygen inhalator. The wall-mounted oxygen inhalator comprises a cup, a float flow meter, an upper connecting piece, a connector and a filtering loop, wherein a lug boss is arranged on the lower end face of the connector; a groove is formed in the lug boss; the bottom of the groove is cone-shaped and an oxygen outlet is formed in the cone-shaped wall; a lug boss is arranged on the upper end of a lower connecting piece and external threads are formed on the lug boss; a first flange and a threaded blind hole are formed at the lower end of the lower connecting piece; internal threads matched with external threads on the lower end of the connector are formed on the upper end of an end cover, and an oxygen pipe connection is formed on the wall of the end cover; external threads are formed on the upper end of an end cap, while a second flange is formed on the lower end of the end cap; a blind hole is formed in the axial direction and an oxygen discharge channel is formed in the lower end of the blind hole. The wall-mounted oxygen inhalator is simple in structure, low in processing technic requirements, compact in structure, and easy to manufacture and assemble.

The invention belongs to the technical field of batteries, and discloses a battery module and a battery pack. The battery pack comprises the battery module. The battery module comprises a module shell, a battery cell assembly, a detection unit and a discharging unit, wherein a containing cavity is formed in the module shell; a discharging channel is formed in the side wall of the module shell in a hollowed-out mode; the discharging channel communicates with the containing cavity and the exterior of the module shell, and a purification unit is arranged in the discharging channel and used for purifying gas penetrating through the discharging channel; the battery cell assembly is mounted in the containing cavity; the detection unit is arranged in the module shell and used for detecting an air pressure value and temperature in the module shell; and the discharging unit is arranged in the module shell and used for guiding gas in the containing cavity into the discharging channel. According to the invention, the discharging unit can guide heat and gas into the discharging channel in time and finally discharge the heat and the gas out of the module shell, and the gas can be purified and filtered by the purification unit when penetrating through the discharging channel, so environment pollution is avoided.

The invention discloses an integrated air valve for a massage appliance, which comprises a valve body, an air intake channel and a plurality of air delivery branches are arranged in the valve body, the air intake channel has a plurality of diversion ports, and the diversion ports and gas delivery branches are connected; the gas transmission branch is provided with a check valve and an exhaust valve; the check valve includes a check port and a disc, and the exhaust valve includes an exhaust port and a movable spool; the movable spool is set On the other side of the valve disc relative to the check port, the movable valve core moves to the position where the exhaust port is opened, and presses against the valve disc to close the check port. The invention discloses an air massage appliance adopting the integrated air valve of the invention, so that the volume of the massage chair is smaller, the air bag massage system is more stable, and the massage effect is better. The invention solves the problem in the prior art that the airbag massage units cannot be exhausted and pressure maintained independently when they share the intake channel, and the air pressure of each airbag massage unit does not affect each other during pressure maintenance.

The invention discloses a technical preparation apparatus for monomers of polymers. The technical preparation apparatus comprises a base; a seal box is fixedly arranged on the right side of the upperend surface of the base, and is internally provided with rotation space; a rotating motor is arranged in the rotation space; the output shaft of the rotating motor is rotatably cooperated and connected with a rotating shaft; the seal box is also internally provided with preparation space; a feeding device is arranged at the central position of the upper end surface of the seal box; a seal openingis arranged at the central position of the upper end wall of the preparation space; a liquid medicine storage cabinet is fixedly connected with the left side of the upper end surface of the base; a horizontally-oriented filter plate is arranged at the central position of the preparation space; the front side of the upper end of the filter plate is provided with a sweeping device that moves forwardand backward; the lower end of the rear end surface of the seal box is provided with a storage cabinet; and the lower side of the right end surface of the seal box is provided with a liquid outlet pipe. During the operation of the technical preparation apparatus in the invention, the structures of raw material particles for monomers are crushed during descending of the raw material particles formonomers under extrusion and pushing, so preparation of effective components in virtue of liquid medicine is facilitated and the cleaning of materials is automatically completed; and thus, labor intensity and labor cost can be reduced.

The disclosed permeameter for silicon steel magnetic performance comprises: an upper / lower yoke with one fixed and another connected with a drive motor, some coils included excitation coil and measuring coil, an excitation power, and a pressure sensor. Compared with Epstein square coil, this invention can save sample material greatly, reduces measurement error, and can bring much economic benefit.

The invention discloses a self-adjustment type nozzle assembly for a full encapsulation mold. The self-adjustment type nozzle assembly comprises a glue spray pipe and an adjusting baffle. The sectionof the glue spray pipe is square, and the glue spray pipe is arranged at the front end of a glue pipe in a sleeving manner. Adjusting grooves and inserting holes are formed in the two opposite end faces of the inner wall of the glue spray pipe, and a connecting rod is fixed between the two side walls of the glue spray pipe. A supporting plate is mounted in the center of the rear end face of the connecting rod and is perpendicular to the connecting rod. Protruding clamp columns are arranged on the two sides of the rear end of the adjusting baffle, and the center of the rear end face of the adjusting baffle extends to form a rod body. A trigger rod is hinged to the end of the rod body. The adjusting baffle is clamped in the inserting holes of the glue spray pipe through the clamp columns onthe two sides, the rod body at the rear end and the trigger rod are located in the glue pipe, and the bottom of the trigger rod abuts against the supporting plate. The adjusting baffle rotates with the clamp columns as the center, and switching of the inclined state and the horizontal state of the adjusting baffle is achieved.

The invention discloses a wall outlet oxygen inhalator, and the wall outlet oxygen inhalator comprises a cup, a buoy flow gauge, an upper connecting element, a connector, a filter ring, a lower connecting element, an end cover and an end cap; the upper end of the lower connecting element is matched with the lower end of the connector; the upper end of the end cover is matched with the lower end of the connector; the outer wall of the upper end of the end cap is provided with an external screw thread, and the lower end thereof is provided with a second flange extended in a radial direction; the end cap is axially provided with a blind hole, and the lower end of the blind hole is provided with an oxygen exhaust passageway; the filter ring is sleeved on the end cap; the blind hole on the end cap is connected with the upper through hole of the lower connecting element; the connector is provided with a pressure relief passageway whose outlet is provided with a pressure relief valve; the lower end of the connector is provided with an axial slot whose bottom is provided with a pressure relief passageway inlet; the slot wall on the corresponding connector is provided with an oxygen pipe port; an elastic element is arranged in the slot and provided with an axial through hole. The wall outlet oxygen inhalator has the advantages of simple structure, being convenient to process and manufacture, the pressure relief passageway is arranged on the connector such that the inhalator has the above university and can be applied to ordinary oxygen inhale or atomization inhalation.

The invention discloses a new material processing and mixing treatment device. The device comprises a reaction tank and a mixing treatment tank, a top cover is arranged at the top of the mixing treatment tank, a connecting air guide pipe is installed between the top of the top cover and the bottom edge side of the reaction tank, a backflow air pipe is installed between the top edge side of the reaction tank and the upper edge side of the mixing treatment tank, a filtering self-power-generating device is installed in the middle of the backflow gas pipe, a mixing device is installed in the mixing treatment tank, a reaction cavity is formed in the reaction tank, a pressure triggering device is arranged at the bottom of the reaction tank, a deposition liquid base plate is arranged below the inner side of the reaction cavity in summer, and a discharge hole is formed in the side of the outer ring in the reaction tank. The invention relates to the technical field of new material processing. The new material processing and mixing treatment device solves the problems that: a stirring device is often uneven in stirring, existing treatment devices cannot rapidly separate lower-layer reactionliquid, and the internal reaction rate is low.

The invention discloses an operation control method for a multi-split air conditioner. The operation control method for the multi-split air conditioner includes the following steps that when an outdoor unit is started, a compressor is controlled to operate for a first preset time period according to the initial frequency; a first pressure value of refrigerant pressure at the high-pressure side of the air conditioner is detected within the first preset time period; whether frequency increase of the compressor is needed or not is judged according to the first pressure value; and when frequency increase of the compressor is needed, the frequency of the compressor of the outdoor unit is increased, so that the refrigerant pressure at the high-pressure side of the air conditioner is increased before reversing of a four-way valve. The invention further discloses an operation control device for the multi-split air conditioner. By means of the method and device, the reliability of operation of the multi-split air conditioner is improved.

The invention discloses a sealer for sealing a grouting wellhead. The sealer comprises an upper cylinder body and a lower cylinder body, wherein the upper cylinder body and the lower cylinder body are each provided with an inner hole and are connected in a rotating mode. The inner hole of the lower cylinder body is internally transversely provided with a supporting plate with an inner hole. The supporting plate is provided with an elastic sealing body with an inner hole. The lower end of the upper cylinder body stretches into the inner hole of the lower cylinder body. The upper cylinder body is provided with a rotating handle and a side supporting pipe. A middle hole of the side supporting pipe is communicated with the inner hole of the lower cylinder body. The side supporting pipe is provided with a pressure gage and an overflow valve. By means of the sealer, the grouting wellhead can be totally sealed, concrete slurry is prevented from flowing backwards through the grouting wellhead in the pressurization grouting process, and waste of the concrete slurry is avoided; it is guaranteed that cement slurry is poured under the pressure required by the process, the packing character of the concrete slurry is improved, related seams are fully filled, and the strength of a grouting layer is improved; the overflow valve is arranged, when the pressure of the concrete slurry in the lower cylinder body exceeds the set value, the overflow valve is opened, redundant slurry is discharged, and the pressure value required by the process is maintained.

The invention provides a low-pressure early-warning protection system for a mining liquid carbon dioxide pipeline. Through adopting the low-pressure early-warning protection system for the mining liquid carbon dioxide pipeline, when the pressure in the carbon dioxide pipeline is lower than a preset pressure value, an intrinsic safety control box generates a control instruction for closing a low-temperature stop valve, the control instruction for closing the low-temperature stop valve is sent to an automatic opening and closing system, and the automatic opening and closing system controls the low-temperature stop valve to be opened or closed through a mining cable, so that real-time monitoring control over the pressure value in the carbon dioxide pipeline is achieved; and when the pressurevalue is lower than the preset pressure value, the low-temperature stop valve can be effectively used for sealing the pipeline, so that the pressure in the pipeline is kept, and the problem that the carbon dioxide pipeline cannot be used for a long time due to the fact that carbon dioxide in the pipeline is converted from a liquid state into a solid state and forms dry ice when the pressure of thepipeline is lower than 1 Mpa is avoided.

The invention discloses a multi-differential-pressure type multiple high-pressure gas cylinder safety protection device. A mechanical shell, a solenoid valve shell and a multi-differential-pressure type structural shell are welded together. The mechanical shell is connected with a high-pressure gas cylinder. A solenoid valve element in the solenoid valve shell is of a wedge-shaped multi-level sealing structure. The multi-differential-pressure type structural shell is of a multi-differential-pressure type structure. According to the multi-differential-pressure type multiple high-pressure gas cylinder safety protection device, electronic control mechanical set is conducted through a solenoid valve and the multiple levels of sealing structures; mechanical set is conducted on the basis of thedifferential pressure principle of a front working cavity and a rear working cavity of a mechanical valve body, dual set protection is achieved, the structure is more stable, safe and reliable; an electromechanical dual protection structure formed by the multi-differential-pressure type structure and the solenoid valve is adopted, autonomous set of a mechanical structure and electronic control setof the solenoid valve are protected; the pressure value of gas in a gas channel is guaranteed to be a stable value; and motion of the mechanical structure is guaranteed.

The invention discloses a sealer for sealing a grouting wellhead. The sealer comprises an upper cylinder body and a lower cylinder body, wherein the upper cylinder body and the lower cylinder body are each provided with an inner hole and are connected in a rotating mode. The inner hole of the lower cylinder body is internally transversely provided with a supporting plate with an inner hole. The supporting plate is provided with an elastic sealing body with an inner hole. The lower end of the upper cylinder body stretches into the inner hole of the lower cylinder body. The upper cylinder body is provided with a rotating handle and a side supporting pipe. A middle hole of the side supporting pipe is communicated with the inner hole of the lower cylinder body. The side supporting pipe is provided with a pressure gage and an overflow valve. By means of the sealer, the grouting wellhead can be totally sealed, concrete slurry is prevented from flowing backwards through the grouting wellhead in the pressurization grouting process, and waste of the concrete slurry is avoided; it is guaranteed that cement slurry is poured under the pressure required by the process, the packing character of the concrete slurry is improved, related seams are fully filled, and the strength of a grouting layer is improved; the overflow valve is arranged, when the pressure of the concrete slurry in the lower cylinder body exceeds the set value, the overflow valve is opened, redundant slurry is discharged, and the pressure value required by the process is maintained.

The invention discloses a buoy releasing and launching device, and particularly relates to an unmanned aerial vehicle pod type buoy releasing and launching device. The device is characterized in that an electromagnetic valve is connected with a launching cylinder fixing base through an upper cover plate, an upper cover is mounted between a first unlocking piece and the upper cover plate, a second unlocking piece and the first unlocking piece are limited through a step, and a pre-pressing spring is installed between the first unlocking piece and the second unlocking piece. When a sonar buoy needs to be launched, gas in the high-pressure gas cylinder controls on-off of the open circuit through the electromagnetic valve, so that a buoy releasing barrel is rapidly filled with the high-pressure gas in the high-pressure gas cylinder, the pressure generated by the high-pressure gas pushes the buoy and an unlocking mechanism, and buoy releasing is achieved. According to the technical scheme, a releasing executing mechanism which is lighter and cleaner is provided, and the problem that an existing high-pressure gas buoy releasing structure is complex, large, heavy, high in failure rate, uncontrollable in speed and the like is solved.

The invention discloses a water treatment method and a device for replenishing water at constant pressure. By using a controller, the pressure value in the constant pressure tank is divided into three intervals, that is, the pressure value in the constant pressure tank is below the first threshold, Between the first threshold and the second threshold and the normal value, after the second pressure gauge detects the pressure in the constant pressure tank, the controller judges that the pressure value detected by the second pressure gauge is below the first threshold, the second Between the first threshold and the second threshold or the normal value; use the water replenishment and constant pressure of the two delivery channels to ensure accurate replenishment of water into the constant pressure tank, and ensure the pressure value in the constant pressure tank at all times, so as to improve the user's confidence Satisfaction with the product.