98results about How to "Fill the gap in the industry" patented technology

The invention provides a passenger flow estimation system under the condition of urban rail road network emergency. A multi-factor influence impedance calculating method and an effective path calculating method are designed, so that a road network inter-OD multipath distribution ratio is acquired by a system; the passenger flow is loaded according to the distribution ratio; the full state of the passenger flow is acquired through the deduction of the passenger flow in the road network according to a historical passenger flow distribution law at the corresponding period; the influenced passenger flow is selected according to the information about the emergency; after the influenced passenger flow is processed according to a redistribution rule, a passenger flow index is counted and recorded, so that a final calculating result is acquired. According to the invention, the rail transit road network emergency processing capability is increased and the safety of the rail transit is ensured, so that the service level and quality of Chinese urban rail transit are greatly increased and the passenger flow estimation system is a beneficial measure for the life of people.

The invention provides a passenger flow estimation method for an urban rail road network. By designing a multi-factor affected impedance calculation method and an effective path calculation method, a multi-path distribution ratio between OD (origin-destination) of the road network is obtained, and the passenger flow is loaded according to the ratio. By combining the historical corresponding period passenger flow distribution rule, the total state of the passenger flow is obtained by the deduction of the passenger flow in the road network. By accurately estimating the passenger flow volume of the road network, the safety of urban rail transit is ensured, so that the service level and quality of Chinese urban public transport are substantially improved, and the passenger flow estimation method is a useful measure in favor of people's livelihood.

The invention relates to a molecular biology identification method for dry sea cucumbers, which comprises the following steps: extracting genome DNA of dry sea cucumbers by a high salt method; amplifying CO I genetic fragments by using a degenerate primer PCR; carrying out agarose gel electrophoresis detection on enzyme-digested products; and determining the result by the quantity and the length of electrophoretic bands. The method is used for identifying different varieties of sea cucumbers, has the characteristics of high accuracy and speed as well as convenience and is more accurate and reliable when compared with the traditional morphological identification.

The invention provides a device applied to tying of an inner bag of a bilayer packaging bag. The device comprises racks positioned on the left and right sides of and above a flow line, a ribbon tying device (1), four bag opening pulling-down devices (2) and bag clamping exhausting devices (3), the ribbon tying device (1), the bag opening pulling-down devices (2) and the bag clamping exhausting devices (3) are arranged on the racks, the bag opening pulling-down devices (2) are arranged on the racks on the two sides in a two-two symmetry manner, each the bag clamping exhausting device (3) is arranged between the two bag opening pulling-down devices (2) on a same side, and the ribbon tying device (1) is connected with the rack above, positioned in the middle of the two racks on the two sides and positioned above the bag opening pulling-down devices (2) and the bag clamping exhausting devices (3). A process integrating bag clamping, pulling-down of an outer bag, exhausting, bag opening contracting and tying is provided creatively, tying of the inner bag of the bilayer packaging bag is fully automatic, so that an industrial blank of tying the inner bag of the bilayer packaging bag is filled in and efficiency in tying the inner bag of the bilayer packaging bag is improved greatly.

The invention relates to a combustion working condition real-time monitoring system for a gas-fired boiler. The combustion working condition real-time monitoring system comprises a data acquisition system, a gas-fired boiler efficiency real-time calculation system, a user message receiving system, a boiler operation real-time working condition adjustment device and a user message feedback and improvement system, wherein the data acquisition system is used for measuring real-time working condition data of the water supplying temperature, the steam temperature, the fuel gas pressure, the steam pressure, the fuel gas flow and the steam flow of the gas-fired boiler; the gas-fired boiler efficiency real-time calculation system is convenient for performing comprehensive analysis and calculation on various acquired data; and the user message receiving system, the boiler operation real-time working condition adjustment device and the user message feedback and improvement system are convenient for a user to receive data through a remote data transmission system, get real-time boiler operation working conditions, adjust according to the working conditions and improve the boiler operation working conditions continuously. Real-time monitoring, timely adjustment and continuous improvement for the working conditions are integrated organically, so that the gas-fired boiler finally operates at a high-efficient optimized working condition state; the conception is novel; the scheme is reasonable, scientific and energy-saving; and high practicability is provided.

The invention relates to a slewing bearing wearing extent on-line measurement and lubricating grease automatic filling-up method. The method comprises the steps of utilizing the change of a lubricating grease insulating property to judge the change of metal particle content in a lubricating grease, and judging the wear condition of a slewing bearing raceway, so as to indirectly judge the generation and development of the damage of the raceway and be used for optimizing a lubrication condition of a slewing bearing, determining filling-up quantity and filling-up frequency of the lubricating grease according to the wear condition, and realizing the required lubrication of a self-adapting working condition. The method provided by the invention avoids the problem of separation of a wearing extent value of a micrometric displacement measuring method, the problem of self abrasion of a contact-type micrometric displacement transducer, and the problem of insufficient non-contact type micrometric displacement range and poor accuracy, can realize on-line measurement, avoids the problems that the regular fixed point filling-up has the problems of excessive pouring grease or shortage and the like, optimizes the lubrication condition of the slewing bearing, effectively improves the load-carrying capability of the slewing bearing, prolongs the service life, and fills up an industry blank; and the purposes can be realized just by general instrument and equipment such as electric control grease pouring pumps, insulation meters and measuring heads.

The invention provides a device and a method for determining system pressure drop change in a cigarette burning period in real time. The device comprises a cigarette clamp, a three-way control valve, a pressure sensor, a signal processing module, a controller, a cigarette suction system and a synchronous trigger device used for capturing a suction signal, wherein an outlet of the cigarette clamp is connected with a first port of the three-way control valve through a first hose, and an input end of the pressure sensor is connected with a third port of the three-way control valve through a second hose. The device can be used for realizing the real-time monitoring for the change condition of the pressure drop in the cigarette burning period, determining the pressure drop value in the system in the cigarette burning period, monitoring the change condition in the suction burning process and realizing the dynamic detection for the burning condition in the cigarette suction process, and meanwhile, the device can meet the requirements of monitoring and measuring for the pressure drop change condition in the suction system under different cigarette suction parameters and different smoke capturing modes. The device and method are wide in application scope.

The invention relates to detection on the mechanical performance of building members, and particularly provides an autoclaved aerated concrete block masonry performance detection method. The method comprises the following steps: 1) laying a masonry and maintaining, then laying down the masonry, and transferring to a loaded platform of detection equipment; putting the masonry flat, supporting one end with a round steel tube, and supporting the other end with angular steel, wherein the corners of the angular steel are contacted with the lower surface of the masonry; 2) then applying load to the surface of the masonry with a jack from top to bottom at the application speed of 0.03-0.3N / mm<2> per minute, wherein the application speed is controlled according to collapse of a test piece in 3min-5min; and 3) recording the collapse load value and the collapse feature, and calculating and processing test data to obtain a test result. The autoclaved aerated concrete block masonry performance detection method is suitable for performance detection of blocks or masonry. The method has the effects of being convenient to detect and implement, and beneficial to improvement of detection standardization and detection precision.

An embodiment of the invention discloses a main / backup NAS (Network attached storage) switching method and a main / backup NAS switching device, wherein the main / backup NAS switching method comprises the following steps of building a flexible link for a main NAS on a host on which the main NAS and a backup NAS are mounted, so as to perform the data reading-writing processing on the main NAS through the flexible link; checking preset check items and judging whether the main NAS is available or not according to the checked result; performing the switching processing if the main NAS is invariable, wherein the switching processing comprises the step of deleting the flexible link for the main NAS and building a flexible link for the backup NAS on the host. By employment of the switching method and device, the switching between the main NAS and the backup NAS is quickly and effectively realized by means of building and deleting the flexible link, and the problems of complicated operations and high cost in the existing physical layer switching scheme are solved. Moreover, according to the main / backup NAS switching method and the main / backup NAS switching device, the switching processing can be performed timely under the conditions of reading-writing anomaly and network anomaly, and the automatic linkage switching of multiple shared units can also be realized.

The invention discloses a formulating method and accurate application of a microbial fertilizer dynamic inoculant formula, and belongs to the field of personalized customization of micro-ecological fertilizer. The active composite microbial inoculant formula is optimized and formulated by performing biological information analysis on the original microbial flora of a soil sample; natural plants are fermented by the inoculant formula, the plant components are continuously fermented and heated under the action of the active composite microbial inoculant subjected to personalized construction, the plant components are completely decomposed and composted while harmful pathogens are killed, and high-quality biological fertilizer is obtained; the microbial fertilizer dynamic inoculant formula solves the traditional single production process, further optimizes and virtuously circulates resources, is completely and accurately applied to the field of modern agriculture, fills the gap of the industry, greatly accords with the situation of China and has a wide application prospect.

The invention belongs to the field of operation quality assessment and monitor configuration of PON optical network and specifically relates to a method for accurately regulating and controlling business optical signal power of a PON network. During an operation process of the optical network, an optical network device accurately calculates transmit-receive light power values of related business wavelength of each optical node in optical network topology for a certain moment, the transmit-receive light power values of related business wavelength of each optical node at the very moment are gathered through optical network business, the received optimal power of the related business wavelength of any optical node is subtracted by the measured receive light power value of the related business wavelength at the moment, the obtained difference is a regulation and control value of the emission power of related business wavelength of the optical node optical network equipment corresponding to the optical node in the optical network topology, and related equipment is accurately regulated and controlled. The method realizes on-line accurate regulation and control of various business optical signal power of an optical network, ensures optimal work state of the network, and greatly improves the operation and management quality of the optical network.

The invention discloses a preparation method of an active compound microbial agent and a derivative microecological product thereof and application of healthcare food, healthcare products or drug having functions of lowering blood lipid and assisting in weight reduction in lowering blood lipid and preventing and treating related diseases like obesity and cardiovascular and cerebrovascular diseases. Active compound microbial strains are all from various natural strains of healthy people. According to a biological information analysis and management platform, an active compound microbial strainformula is optimized and improved to obtain the high-quality active compound microbial agent and a derivative thereof; harm caused by adding chemical reagents is avoided; the active compound microbialagent has efficacy of retaining diverse symbiotic flora functions of intestinal tract and regulating flora balance and fat metabolism; the problem of conventional unitary production processes is solved, a new path is provided fir high-value production of micro-ecological products, industrial blank is filled, and the active compound microbial agent has good application prospect; scientific conclusions closely related to diseases like gastrointestinal micro-ecological disorder and obesity and cardiovascular and cerebrovascular diseases are applied and improved.

The invention relates to an MMC converting system and a fault-tolerant control method thereof. The converting system comprises m*n MMC converting units which form an m*n-order matrix, wherein each MMC converting unit is one matrix unit in the matrix, the matrix units in the same column are connected sequentially, and the matrix units in the same line are connected sequentially; at least one full-bridge sub-module is arranged on each bridge arm in each MMC converting unit. The MMC converting system is divided into three layers for fault-tolerant control, the first-layer control is matrix unit fault-tolerant control, the second-layer control is matrix line fault-tolerant control, and the third-layer control is matrix column fault-tolerant control; by means of the fault-tolerant control on three levels including the matrix units, the matrix lines and the matrix columns, cross-redundant fault-tolerant control of the flexible converting system is realized, the industrial blank is filled up, the reliability of the high-voltage high-capacity flexible converting system is improved greatly, and industrial promotion is facilitated.

The present invention discloses a multi-intelligent terminal communication connection control method and a multi-intelligent terminal communication connection control system, and belongs to the communication technology field. A plurality of parallel session users comprises a first parallel session user and at least one second parallel session user, the first parallel session user comprises a first chairman and a plurality of first participation users, and each second parallel session user comprises a second chairman and a plurality of second participation users. The method comprises the steps of establishing the connection of the first chairman and the plurality of first participation users; establishing the connection of the second chairman and the plurality of second participation users; realizing the data information transmission of the first parallel session user and the second parallel session user via the data interaction between the first chairman and the second chairman. Therefore, the communication connection, such as the video conference, etc., among the intelligent terminals, such as a plurality of intelligent mobile phones, etc., is realized, the usage experience of users is improved, the method and the system are especially suitable for the business travelers to carry out the business transaction at any time and at any place via the intelligent terminals, and the working efficiency and life quality are improved.

The invention relates to a local indentator for a fiber towel. The local indentator comprises a heating plate, a pattern plate disposed below the heating plate and tightly adhered to the heating plate, a fixed plate disposed below the heating plate and used for disposing the fiber towel, a supercharging device disposed above the heating plate and used for driving the heating plate to drop, and a temperature controller. An electrical heating element and a temperature sensor are disposed in the heating plate. The electrical heating element is electrically connected to the temperature controller. The temperature sensor and the temperature controller are electrically connected. The invention also provides a manufacturing method of indentation in a specific position of the fiber towel by utilization of the local indentator. According to the manufacturing method, the local indentation can be formed selectively in the specific position of the single fiber towel and pictorial trademarks, telephones, and the like can be printed on the fiber towel. The local indentator and the manufacturing method overcome limitation that the indentation of the fiber towel at present must be whole-area indentation. The local indentation can be formed selectively in the specific position of a single finished-product fiber towel. The local indentator and the manufacturing method are mainly used for indentation on catering moist wipes.

The invention discloses an aluminum electrolysis cell integral lining furnace building 3D detection device and method. The device comprises a fixing frame, and the fixing frame is erected right abovean electrolysis cell; a movable frame is arranged on rails on two main beams of the fixing frame, a moving device is arranged on rails on two main beams of the movable frame, and the movable frame andthe moving device are respectively provided with an automatic positioning system; a 3D camera and a furnace building device are arranged on the moving device; and the 3D camera and the furnace building device can be driven by the movable frame and the moving device to move at will in the X direction and the Y direction. Compared with the prior art, by adopting the technical scheme, the furnace building quality can be efficiently monitored in real time, the furnace building operation is guided, and the industry blank is filled.

The invention relates to a method and system for synchronously playing multiple paths of medical images on the same time axis, and belongs to the field of medical video playback. On the basis of a time service module, continuous video data information fragments are collected from multiple paths of video output devices and / or medical image output devices respectively; the acquisition time information of each video data information segment of each path is added to the video data information segment; and collection time information corresponding to the backtracking playing time information is matched according to the backtracking playing time information input by a playback user, and a corresponding video data information fragment is determined in each path of video file for playing. According to the invention, when the video information is collected, the collected information is loaded into the video information segment, so that the video information segment is convenient to call according to the set time in the later period and align at the time points of different paths of videos during playing.

The invention discloses a detection method for a silk grafting rate. The detection method is characterized by comprising the following steps: (1) subjecting to-be-detected grafted silk to thermogravimetric analysis so as to obtain a DTC curve, carrying out peak-differentiating and imitating on the DTC curve, respectively calculating peak areas when a peak position is in a temperature range of 275 to 295 DEG G and of 320 to 330 DEG C and respectively marking the peak areas as S1 and S2; and (2) calculating the grafting rate of the to-be-detected grafted silk according to the formula prescribed in a formula 2, i.e., (grafting rate)% = S1 / S2 * 100%. The detection method provided by the invention reveals the corresponding relationship between the grafting rate and thermogravimetric DTC performance through thermogravimetric analysis and peak-differentiating and imitating and mathematic analysis of the DTC curve; as for silk application and consumers, the detection method facilitates product quality detection, component discrimination and cost accounting, thereby filling in a blank in the industry.

The invention relates to a multi-speed tail-drying-type mixed fertilizer granulation production process and special production equipment thereof. The special production equipment comprises a batching system, a crusher, a rotor drum granulator, a disc granulator, a primary drying drum, a primary cooling drum, a primary screening machine, a secondary drying drum, a secondary cooling drum, a secondary screening machine, a coating machine and a finished product warehouse, wherein the batching system, the crusher, the rotor drum granulator, the disc granulator, the primary drying drum, the primary cooling drum, the primary screening machine, the secondary drying drum, the secondary cooling drum, the secondary screening machine, the coating machine and the finished product warehouse are sequentially connected. The multi-speed tail-drying-type mixed fertilizer granulation production process and the special production equipment thereof provided by the invention have the advantages that the fertilizer particle granulation rate is high, the appearance is good, the water content is low, the roundness is high, the strength is high, no hardening occurs, the yield is high, organic fertilizers, inorganic fertilizers and organic and inorganic mixed fertilizers can be produced, the negative effect of the conventional process is solved, the industrial blank is filled and the popularization and application are greatly facilitated.

A worm gear transmission structure and a worm gear reducer, including a worm gear and a worm, wherein the worm gear includes a toothed plate and a worm shaft arranged coaxially, the worm includes helical teeth and a worm shaft, the toothed plate and the helical teeth mesh with each other, and the worm includes a barrel Shaped gear bar, the helical teeth are arranged on the outer periphery of the gear bar, and the worm shaft runs through the gear bar and is arranged coaxially with the gear bar; the radial position between the gear bar and the worm shaft is fixed, and at the same time, the gear bar slides and translates along the axial direction of the worm shaft. The worm shaft can be used for a long time because it is a non-wearing part, and the gear rod as a wearing part can be replaced at any time according to the usage situation, and the standardization and serialization of products can also be realized according to requirements. Since the toothed rod can slide and translate freely on the worm shaft, it can eliminate the poor meshing state of the fixed point caused by the error of the tooth profile. In addition, the present invention can be applied to the installation and use environment where the worm is in a non-horizontal state, which fills the gap in the industry.

The invention provides a precise measurement method for the free bending forming size of a pipe plane, and the method is characterized in that the method comprises the steps: scanning a plane bent pipe, generating a point cloud picture, and generating a solid model after fitting; projecting a straight-line section part A before the bending starting point and a straight-line section part B after bending is stopped to obtain a contour line of the straight-line section part A and the straight-line section part B; making ten equidistant vertical lines to pass through the contour lines, connecting the vertical lines with intersection points of the two contour lines, taking midpoints of all line segments for straight line fitting, and obtaining central axes LA and LB; establishing a new coordinate system X1Y1Z1; calculating to obtain a conversion matrix M of a new coordinate system and an old coordinate system, projecting LB to X1O1Z1 after data point conversion to obtain a rotation angle theta around an X1 axis, and converting to obtain a new data point; and outputting an X1O1Z1 front view to obtain the contour line of the whole pipe fitting. The measuring method provided by the invention can obtain the central axis of the plane bent pipe in actual machining, and the bending radius and the bending angle of the bent pipe are obtained through the central axis, so that the accuracy of measuring the important size of the bent pipe is improved, and the industry blank is filled.

The utility model discloses an aeolian sand and loess hopper vibration type discharging device, and belongs to hopper vibration type discharging devices. The vibration type discharging device comprises a receiving hopper, a vibration grate net, a vibration pull rod, a spring bracket, a spring, a mounting plate, a vibrating device, a vibration motor base and a vibration motor; the mounting plate orthe vibration motor base is connected to the upper end of the vibration pull rod, the vibration motor is connected to the vibration motor base, and the mounting plate is used for fixing the vibrationtype discharging device; the lower end of the vibration pull rod is connected with the vibration grate net, and the middle position of the bottom surface of the vibration grate net is connected withthe vibrating device; the inner wall of the upper end of the receiving hopper is connected with the spring bracket; and the vibration pull rod below the mounting plate is sleeved with the spring, thelower end of the spring is located on the spring support, and the vibration pull rod can slide in the spring. The utility model has the advantages of simple structure, less parts, greatly reduced failure rate and convenience in disassembly and maintenance. And real-time start and stop and frequency adjustment can be controlled on site and remotely. The vibration grate net is used for filtering impurities in the materials; and the vibrating device is used for treating the corners of the discharging opening.

The invention discloses a polyurethane rubber plate conveying device capable of realizing automatic compensation after abrasion. The polyurethane rubber plate conveying device comprises a strip-shapedhollow frame body, and strip-shaped through holes are formed in the end plates on the two sides of the width direction of the strip-shaped hollow frame body respectively; a feeding driving shaft is arranged in an inner cavity of the strip-shaped hollow frame body in the length direction, and an automatic compensation mechanism is arranged on the outer end wall of one side of the strip-shaped hollow frame body in the length direction; and the automatic compensation mechanism comprises a coupler, a torque sensor and a motor, screw holes are formed in the bottom ends of the two sides of the strip-shaped hollow frame body in the length direction respectively, and a compression bolt is screwed into each screw hole.

The invention belongs to the field of liquid ammonia detection and relates to an on-site fast efficient full-automatic detection system of liquid ammonia residues. The system comprises an analyzer cabinet and is characterized in that the analyzer cabinet has a fully enclosed structure, the analyzer cabinet is provided with a cleaning water inlet and outlet, a sampling pipe port and a man-machine interaction system, an analysis system, a cleaning system and a corresponding electronic control part are arranged in the analyzer cabinet, the electronic control part is connected to the man-machine interaction system, and the analysis system comprises a volume metering sampling and fast volatilization unit and a residue automatic quantitative measurement unit. The system is safe in operation, has no pollution, is portable, is easy to use, solves the problem that artificial analysis has poor accuracy and reproducibility of analysis and guarantees personal safety of the operator.

The invention discloses an internal mixing and compounding technology for improving the fluidity of a rubber material. The internal mixing and compounding technology is characterized in that based on a rubber material fluidity analysis meter, fluidity data of the rubber material is measured in real time, and technological parameters in a rubber material internal mixing process are adjusted, thereby improving the product quality. The rubber material fluidity analysis meter detects the fluidity of the rubber material specifically, and has the advantages that the rubber material fluidity analysis meter is close to production, is wide in application and detects quickly. The rubber material fluidity analysis meter is extremely suitable for control and monitoring of the size stability of semi-finished products, fills a gap in the industry, provides great help for the quality control of tires, and plays an important role in improving the quality of the tires and stabilizing process control.

The invention discloses a device for measuring change of pressure drop in burning period of cigarette in real time and a method thereof. The device comprises a cigarette clamping device, a tubular pressure probe, a pressure testing system, a tubular joint, a cigarette suction system and a data processing system, wherein the cigarette suction system is provided with a suction pipe, and the suctionpipe is in sealed connection with the cigarette clamping device; the input end of the data processing system is connected with the output end of the pressure testing system; the inner diameter of thetubular pressure probe is 0.5 to 1.0mm, and the outer diameter of the tubular pressure probe is 0.6 to 1.1mm. One set of device and method for measuring the change of pressure drop in burning period of cigarette is built. The device has the advantages that the device is connected with the cigarette suction system, the change of pressure drop in the burning process of the cigarette can be monitoredin real time, and the burning condition in the cigarette suction process can be dynamically detected; the important study meaning is realized, and the industry blank is filled.

The invention belongs to the technical field of information security, and discloses a data security calculation method and system, computer equipment, a storage medium and a terminal.The data security calculation method comprises the steps of performing a trust calculation model based on a block chain; proposing a plaintext calculation trusted space of distributed multimode trust based on the block chain; determining a real-time verifiable contract execution mechanism based on the hardware chip. The data security computing system comprises a data management module, a data processing module and an intelligent interaction module. According to the data security computing system provided by the invention, the data ownership is guaranteed through one-key data right confirmation and chain traceability; a barrier of data from a source to use is broken through by simplifying a data circulation process; through distributed encryption storage, privacy data is easily controlled; the data value is mined through secure multi-party calculation, and the data calculation process is ensured not to be leaked; the consensus of the calculation result is credible, and the on-chain result can be verified; and interaction between the hardware equipment and the physical world is controlled through an intelligent contract preset instruction.

The invention discloses a device used for measuring the burning speed of cigarettes and the application of the device. The device comprises a control system (1), an image collection system (2) and a data processing system (3). The image collection system is a camera. The control system is connected with a linear-type smoking machine, receives smoking signals of the smoking machine and controls the camera to collect images of cigarette burning. The data processing system records and processes the collected image signals and outputs the result. According to the device used for measuring the burning speed of cigarettes and the application of the device, the smoking process is continuously recorded through the camera installed on the smoking machine, and image intelligent identification and data processing technologies are adopted to determine the burning speed of the cigarettes. Due to the fact that the device is connected with the smoking machine, dynamic detection of burning conditions in the cigarette smoking process is achieved, the smoldering speed of the cigarettes can be measured, and the absorption burning speed of the cigarettes can also be measured. The device is accurate in measuring result, high in measuring accuracy, high in working efficiency and capable of being applicable to measurement of the burning speed of the cigarettes of various sizes and specifications.

The invention discloses a vehicle-mounted folding retractable type down-the-hole drill. The Vehicle-mounted folding retractable type down-the-hole drill comprises a vehicle body, a folding arm mountedon the vehicle body, a high-wind-pressure air compressor mounted on the vehicle body, a hydraulic main pump device, a traction engine and a vehicle-mounted host. The front end of the folding arm is provided with a plurality of sets of fully-automatic drill head systems. The fully-automatic drill head systems and the front end of the folding arm are connected through two hydraulic worm deceleration slewing bearings capable of rotating by 360 degrees. The vehicle-mounted host is internally provided with a PLC system. The PLC system controls opening and closing of the high-wind-pressure air compressor and controls the drill head systems and the folding arm to automatically find hole positions, automatically adjust angles, automatically drill and automatically change drill pipes. According tothe vehicle-mounted folding retractable type down-the-hole drill, the down-the-hole drill is moved through the vehicle body and convenient to move and convenient to operate and use by workers, the full automatic drill head system working area in enlarged, and the moving frequency of the down-the-hole drill is decreased, so that the working efficiency is improved.

The invention discloses a method for recycling esterification acid wastewater produced in ethyl cyanoacetate production, and relates to the technical field of ethyl cyanoacetate production. The method comprises the following steps: (1) adding sodium hydroxide into wastewater, totally transforming sulfuric acid and acidic salt in the wastewater into sodium sulfate, performing ammonia removal treatment to release ammonia gas, and absorbing the ammonia gas with water to obtain ammonia water; (2) decolorizing the ammonia-removed wastewater to obtain a light-colored transparent solution; (3) cooling the decolorized wastewater to be below 0 DEG C, and filtering to obtain a sodium sulfate crystalline solid; (4) dehydrating and concentrating filtrate, and filtering to obtain a sodium chloride solid, wherein residual mother liquor is an ethyl cyanoacetate solution which is recycled for production. The method is simple, and has high adaptability and a good treatment effect; by adopting the method, components in the wastewater can be transformed, and a high-purity byproduct can be separated and purified or recycled, so that recycling is realized, secondary pollution is avoided, industrial problems are solved, and the industrial blank is filled up.