810 results about "Pneumatic valve" patented technology

The invention provides an organic waste gas treatment device based on zeolite molecular sieve adsorption and desorption treatment. The organic waste gas treatment device comprises an efficient pretreatment unit, a composite zeolite molecular sieve adsorption tower group, a plasma-assisted microwave-hot air regeneration unit, a multi-mode tail gas treatment unit, a digital twin intelligent regulation and control system and a modular expansion interface. By integrating the high-precision VOCs analyzer, the self-adaptive airflow controller, the infrared spectrometer, the multi-channel heat recoverer, the high-performance edge computing server and the intelligent pneumatic valve system, the optimized processing method realizes accurate execution of a formula, the VOCs removal rate is remarkably increased, and carbon loss and energy consumption are reduced. The method has the remarkable advantages in the aspects of VOCs removal rate, zeolite regeneration efficiency, energy consumption control and operation cost, meanwhile, through deep intelligent regulation and multi-mode treatment, the efficient, stable and low-cost VOCs treatment requirements under complex working conditions are met, and an innovative solution is provided for industrial waste gas treatment.

The utility model discloses a polyester reverse esterification kettle on-line adding device which comprises a first esterification kettle and a second esterification kettle, a batching pipeline is arranged between the first esterification kettle and the second esterification kettle, and a three-monomer on-line injection system is arranged on one side of the batching pipeline. A second static mixer, a dynamic mixer and a pneumatic valve are sequentially arranged on the batching pipeline between the three-monomer on-line injection system and the second esterification kettle, and materials prepared by the three-monomer preparation system are injected into a connecting pipeline through the three-monomer on-line injection system; and then the mixture enters the second static mixer and the dynamic mixer to be mixed and then is injected into the second esterification kettle through the pneumatic valve. The transformation from production of extinction products to production of cationic products can be quickly realized in the five-kettle process, so that the productivity and the quality of the products are ensured, and benefits are created for enterprises to be maximized.

The invention relates to the technical field of pressure valves, and provides a high-back-pressure pneumatic valve for a semiconductor chemical system and an assembling method of the high-back-pressure pneumatic valve. The high-back-pressure pneumatic valve comprises an air cylinder assembly, a diaphragm and a valve seat. The cylinder assembly is provided with a cylinder upper cover and a cylinder body which are connected through a rotary lock catch structure, and the piston is assembled on the cylinder body. The diaphragm is provided with a sealing diaphragm part and a valve element integrally arranged in the center, the sealing diaphragm part is provided with a pressure-bearing protrusion and a sealing hook, and the pressure-bearing protrusion provides a back pressure counteracting area accounting for 25%-50% of the flexible area of the diaphragm. A valve port and a flow channel are formed in the valve seat, a mounting hole aligned with the valve port is formed in the valve seat, a sealing clamping groove is formed in the mounting hole, and the sealing clamping groove and the sealing hook are matched to form a sealing interface. The valve element table body is arranged at the valve port and driven by the air cylinder assembly to seal or break away from the valve port. According to the invention, high-back-pressure fluid impact can be effectively balanced, and the assembly efficiency and the maintenance convenience are greatly improved.

The invention discloses a fault monitoring sealing ball valve, belongs to the technical field of ball valves, and solves the problems that a self-adaptive compensation mechanism of an intelligent valve positioner can cover the degradation process of mechanical wear of a pneumatic sealing ball valve quietly during long-term operation, and finally sudden control instability is caused due to the fact that nonlinear wear exceeds a compensation limit. Comprising a valve body, a pneumatic actuator arranged on the valve body, a valve rod which is in transmission connection with an output shaft of the pneumatic actuator and located in the valve body, a valve ball fixedly connected with the valve rod and a fault prediction circuit. The fault prediction circuit comprises a multi-dimensional physical sensing array module, a high-speed synchronous acquisition and preprocessing module, a core signal processing and fusion analysis module, an artificial intelligence coprocessor module and a predictive maintenance decision and life cycle management module. Multi-dimensional signals are collected in real time, valve health is evaluated after fusion analysis, and early warning and maintenance decisions are output.

A pneumatic valve comprises an actuator with a movable closing element being disposed in a housing; the closing element with a tappet penetrating an actuator opening between an air chamber formed in the housing and an actuator chamber, and a plate, with a sealing element, for closing the supply opening, thereon, on that end of said tappet protruding into the air chamber, and an elastic element pressing the plate toward the actuator opening in an activated state; the actuator element configured to move, in a non-energized state, the activating element to press the tappet against a supply opening, and in an energized state to move the activating element so as not to exert force on the tappet so that the plate is pressed in the direction of the actuator opening by the elastic element. A sealing collar disposed about the tappet seals the air chamber from the actuator chamber.

The utility model discloses a salt lake lithium extraction adsorbent scrubbing system which comprises a scrubbing tower and an adsorption tower, and a sunken water distributor is arranged at the bottom end in the scrubbing tower; the middle position of the bottom of the concave water distributor penetrates through the bottom of the scrubbing tower and is connected with a runner opening; a water replenishing opening is formed in the middle of the bottom of the scrubbing tower; two feed ports are formed in the positions, close to the water inlet, of one side of the scrubbing tower, and a water outlet is formed in the position, close to the top, of one side of the scrubbing tower; the flow channel port is sequentially connected with a pneumatic valve j, a diaphragm pump B and an adsorption column through a pipeline; according to the system, crushed resin particles and impurities are effectively removed by cleaning an adsorbent, so that the adsorption performance and the flowability of a resin bed layer are recovered, and it is ensured that the resin bed layer is always in the optimal working state. In the process of scrubbing the adsorbent, the adsorbent does not need to be manually carried except for necessary adsorption tower pipeline connection operation, so that the scrubbing efficiency is remarkably improved.

A method is for operating a compressed air system in a vehicle. The compressed air system has pneumatically operated actuators, switchable pneumatic valves and devices for supplying and preparing compressed air, which are connected to one another via a pneumatic line system. The devices for supplying compressed air include a compressed air source and a compressed air store, and in the line system a pressure sensor is provided for measuring the pressure. An algorithm is programmed such that depending on the difference between the pressure in the compressed air store and the pressure in the line system, pneumatic valves are actuated to connect the compressed air store to the line system only after pressure equalization between the pressure in the compressed air store and the pressure in the line system. During pressure equalization, compressed air from the source and / or the actuators or devices is introduced into the line system.

The invention provides a pneumatic driving part and a pneumatic valve, and relates to the technical field of valve control. The pneumatic driving piece comprises a front cover, a rear cover, a cavity and a piston piece; the first end of the cavity is connected with the front cover, the second end of the cavity is connected with the rear cover, the piston piece is arranged in the cavity, and the cavity is divided into a first inner cavity corresponding to the front cover and a second inner cavity corresponding to the rear cover based on a piston head of the piston piece; the piston piece is used for moving based on the pressure difference between the first inner cavity and the second inner cavity; the front cover is provided with a first one-way sealing piece, and the first one-way sealing piece is used for buffering the moving tail end, moving in the first direction, of the piston piece. The rear cover is provided with a second one-way sealing piece, and the second one-way sealing piece is used for buffering the moving tail end, moving in the second direction, of the piston piece. The first direction is the direction from the rear cover to the front cover, and the second direction is the direction from the front cover to the rear cover. And the movement tail ends of the piston piece in different directions can be buffered, and impact caused by inertia is effectively reduced.

The invention relates to the technical field of electro-pneumatic valve state monitoring, in particular to a state monitoring and alarming method for an electro-pneumatic valve. The method comprises the steps of formulating a knowledge graph updating simulation schematic diagram, and updating association states of various state characteristics and fault types under different time nodes in real time; and predicting the fault type of the current electro-pneumatic valve according to the state characteristics acquired in real time and the updated mapping knowledge domain. According to the method, the knowledge graph updating simulation schematic diagram is formulated, the association state of each state feature and the fault type under different time nodes is updated in real time, the fault matching quantity and the change rate are used as association degree evaluation items of each state feature and the fault type, the relationship between each state feature and the fault type is accurately described, and the fault diagnosis accuracy is improved. A stable knowledge graph is established, the alarm degree is divided according to the predicted fault type and the dynamic association and grade of the current fault type and the state characteristics, early warning is performed according to the alarm degree, and the early warning effect is improved.

The invention discloses a dust removal and safety guarantee integrated system for coal mine underground drilling. Comprising a mining multi-parameter sensor, an electromagnetic pneumatic valve controller, a cyclone dust collector, a dry bag-type dust collector, a gas drainage pipeline, a dust extraction pipeline, a hole sealing dust extraction cover, a compressed air conveying pipe, an electromagnetic pneumatic valve, a front-stage air ejector, a rear-stage air ejector and an air extraction air ejector. The hole sealing dust extraction cover captures drilling dust, the drilling dust enters the cyclone dust collector through the dust extraction pipeline to separate large particles, and air outlet of the drilling dust is divided into two ways: the first way is connected with the gas drainage pipeline through the air extraction air ejector to convey harmful gas, and the second way is connected with the dry bag-type dust collector to filter fine particles. The mining multi-parameter sensor monitors the concentration, the pressure difference, the temperature and the humidity of CH4, CO and CO2, the electromagnetic pneumatic valve controller dynamically switches gas circuits based on data, dust collection, gas drainage, water isolation and fire prevention and control are achieved, the drilling operation safety and the environment quality are remarkably improved, and the device is suitable for a high-gas mine.

The automatic material changing device comprises at least two material barrels provided with pneumatic valves, a connecting plate, a rack, an air cylinder, a collecting barrel and an industrial personal computer, the connecting plate is connected to the rack in a sliding mode and located below a feeding mechanism, the material barrels are installed on the connecting plate, and the air cylinder is installed on the connecting plate. The collecting barrel is installed on the connecting plate and located below the connecting plate, the air cylinder is arranged on the rack to drive the connecting plate to slide, and the industrial personal computer is in communication connection with the air cylinder and the pneumatic valve. The device has the beneficial effects that residual raw materials are used up, and waste of the raw materials is reduced; the equipment is automatically driven to replace the color masterbatch, so that the production efficiency is improved, and the influence of shutdown and startup lifting speed on the product quality is improved; and the manual operation cost is reduced.

The invention relates to a flushing device for preventing crystallization of a liquid supply pipeline and a control method thereof, and belongs to the technical field of semiconductor wafer processing equipment.The flushing device comprises a four-way connector, a flushing water supply pump, an LM machine table, a rough polishing mixing barrel and a KOH barrel are arranged on the periphery of the four-way connector, and a flushing water inlet pipe is arranged between the flushing water supply pump and the four-way connector; a pneumatic valve II is arranged on the flushing water inlet pipe, a machine table liquid supply pipe is arranged between the LM machine table and the four-way connector, a rough polishing liquid supply pipe is arranged between the rough polishing mixing barrel and the four-way connector, a pneumatic valve III is arranged on the rough polishing liquid supply pipe, a KOH pipe is arranged between the KOH barrel and the four-way connector, and a pneumatic valve I is arranged on the KOH pipe. By means of the four-way connector and the four valves, switching of various complex functions is achieved, and the structure is compact. And not only is back flushing achieved, but also an innovative cross-pipeline circulating flushing and comprehensive cleaning mode is achieved, and different types of crystals and pollution can be effectively handled. Liquid is flushed back to an original barrel through back flushing, a KOH solution is repeatedly utilized through a circulating flushing mode, and waste of chemicals and water is reduced.

The invention provides a multi-melting-machine collaborative vacuumizing control system and control method, and belongs to the technical field of quartz crucible manufacturing, the multi-melting-machine collaborative vacuumizing control system comprises a main controller, a main vacuumizing assembly, a plurality of branch vacuumizing assemblies and a plurality of melting machines; the main vacuumizing assembly is connected with the multiple branch vacuumizing assemblies through the vacuum main pipeline, and the multiple branch vacuumizing assemblies are connected with the multiple melting machines in a one-to-one correspondence mode through the melting machine connecting vacuum pipes. The main vacuumizing assembly comprises a vacuum pump, a first pneumatic valve, a first proportional electromagnetic valve, a vacuum tank and a vacuum main valve which are connected in sequence; the branch vacuumizing assembly comprises a vacuum proportion regulating valve, a buffer tank and a vacuumizing valve which are connected in sequence; a vacuum tank is arranged, and the vacuum pressure in the vacuum tank is kept constant by controlling a first pneumatic valve and a first proportional electromagnetic valve; the buffer tanks are arranged on the branches, and the vacuum pressure in the buffer tanks is controlled by the vacuum proportioning valves to be kept constant, so that a stable vacuum system is formed in the melting process of the quartz crucible.

The invention relates to the technical field of automobile noise reduction, in particular to an active noise reduction composite silencer which comprises a containing shell, a plurality of partition plates are arranged in the containing shell and divide an inner cavity of the containing shell into a pressure relief cavity, a head noise reduction cavity, an expansion cavity, a tail noise reduction cavity and a cavity, an air inlet pipe is connected to the containing shell, and the front partition plate and the rear partition plate are removed. And a first-stage noise reduction mechanism and a second-stage noise reduction mechanism are arranged in the head noise reduction cavity and the tail noise reduction cavity correspondingly, a high-pressure pneumatic valve is further arranged in the head noise reduction cavity, a first exhaust pipe and a second exhaust pipe are arranged in the containing shell, and perforated passive noise reduction mechanisms are arranged on the first exhaust pipe and the second exhaust pipe. The first-stage noise reduction mechanism plays a leading role in low-frequency noise reduction, and the second-stage noise reduction mechanism plays a leading role in high-frequency noise reduction, so that in the actual driving process, waste gas noise generated in different driving states of an automobile can be dynamically adapted through the first-stage noise reduction mechanism and the second-stage noise reduction mechanism.

The present application discloses a hoisting tool and a fixture thereof. The fixture comprises a support frame, a clamping mechanism, a pneumatically controlled self-locking mechanism, and a pneumatic valve assembly. The clamping mechanism is arranged on the support frame and is movably arranged relative to the support frame at least in a first direction, such that a clamping space of the clamping mechanism has an adjustable size in the first direction. The pneumatically controlled self-locking mechanism is connected to the clamping mechanism and can communicate with a gas source. Moreover, the pneumatically controlled self-locking mechanism is configured to, in response to an air pressure effect acting on the pneumatically controlled self-locking mechanism, drive the clamping mechanism to move in the first direction so as to adjust the size of the clamping space, and, after the air pressure effect is relieved, lock the clamping mechanism. The pneumatic valve assembly is configured to selectively conduct a gas path between the gas source and the pneumatically controlled self-locking mechanism such that air pressure acts on the pneumatically controlled self-locking mechanism, or block the gas path between the gas source and the pneumatically controlled self-locking mechanism so as to relieve the air pressure acting on the pneumatically controlled self-locking mechanism. According to the present application, the present state is maintained after the gas source is disconnected, thus reducing the risk of a battery falling off from the fixture, and improving the safety during battery hoisting.

The utility model relates to the technical field of valve performance test, and discloses a pneumatic valve flow test system, which comprises a multi-path gas source supply unit comprising a gas source supply assembly, a main pipeline and a shunting assembly which are sequentially connected in series, and the shunting assembly distributes gas of the main pipeline to at least two parallel test branches, each test branch is provided with an independent branch pressure reducing valve; the multi-range flow testing unit comprises gas mass flow meters which are respectively arranged on the testing branches, and the measuring ranges of the gas mass flow meters are different; the multi-size interface pipeline unit comprises quick connectors which are respectively arranged at the tail ends of the test branches and are used for being connected with a valve to be tested, and the sizes of the quick connectors are different; the actuator is connected with the to-be-tested valve and used for receiving the control signal and adjusting the opening degree of the valve; and the data acquisition and processing unit is electrically connected with the gas mass flow meter and the actuator. The pneumatic valve flow test system meets the rapid detection requirements of valves of different specifications.

The invention discloses an automatic cleaning system for industrial television coking materials of a substrate glass kiln, and belongs to the technical field of coking material cleaning. The device comprises a high-temperature-resistant extension protective sleeve, a multi-layer annular space gas barrier module, a central vortex gas cleaning module, a self-sealing pneumatic valve, a clean gas supply system and an intelligent control system. The gas barrier module is integrated on the inner wall of the protective sleeve and can form laminar flow and oblique composite gas flow on the surface of the optical window to actively isolate pollutants; the vortex cleaning module is coaxially arranged in front of the window, and high-speed rotating airflow is generated through a plurality of tangential nozzles to clean coking materials; the self-sealing valve seals the window in a non-cleaning state; the intelligent control system automatically controls the cleaning process according to temperature and image signals. According to the invention, continuous protection, automatic cleaning and intelligent regulation and control of the industrial television window are realized, and the reliability and safety of kiln monitoring are obviously improved.

A pneumatic valve features a housing with an air chamber including a supply opening for compressed air, a connecting opening to an air cushion, and a discharge opening. An actuator with a movable closing element, comprising a plunger and a plate with a first sealing element, is positioned within the housing. The actuator includes a circuit board, an actuating element with an actuating portion and a bending portion, and a shape memory actuator element. In a non-energized state, the actuator element positions the actuating element to press the plunger against the supply opening, while in an energized state, it allows the first sealing element to close the discharge opening via an elastic element. A second sealing element closes the supply opening in a non-energized state and opens it under positive pressure when energized. A third sealing element, elastically connected to the second, closes the supply opening under non-positive pressure conditions.

The invention discloses an intelligent anti-impact control method for a mining remote water seal system. The method aims to solve the problem of water hammer impact caused by quick opening of a valve during remote quick water injection. The method comprises the steps that after a remote water injection instruction is received, a pneumatic valve is controlled to be opened; in the valve opening process, real-time pressure data in the water supply pipeline are obtained; and based on the real-time pressure data, the opening process of the pneumatic valve is intelligently adjusted so as to restrain pressure impact in the pipeline. The method is characterized in that the opening rate of the valve is nonlinearly adjusted according to the pressure safety margin ratio among the real-time pressure, the set maximum safety pressure threshold value and the target steady-state working pressure through a self-adaptive rate feed-forward control model. According to the invention, active suppression can be realized at the initial stage of water hammer impact formation, the pressure peak value is limited within a safety threshold value, and safe, rapid and self-adaptive anti-impact water injection control is realized.

A system including a pumping cassette having a first side including number of valve wells and second side having a fluid bus. Each side may be covered by a flexible membrane. A control surface having a number of valve well control stations actuatable with respect to the flexible membrane covering the first side of the cassette to open and close the valve wells when the cassette is mated against the control surface may be included. A pressure distribution assembly having a positive and negative pressure source and a number of pneumatic valves may be included. A controller configured to selectively actuate the number of pneumatic valves to apply pressure against the valve well control stations in a valve pumping sequence until a volume displaced through the fluid bus of the pumping cassette from a source to a destination is within a range of a target volume may be included.

The invention relates to the technical field of pneumatic valve fault positioning, in particular to a pneumatic valve air leakage positioning system based on multi-parameter fusion and vibration recognition, and the system comprises a data processing module which carries out the denoising of an operation parameter according to an environment noise parameter, and obtains a first operation parameter; the dynamic valve adjusting module sets a judgment threshold value based on the gas type and historical fault data of the pneumatic valve application; the fault judgment module obtains a fault judgment result according to the first operation parameter and a judgment threshold value; and the positioning module obtains a positioning result according to the fault judgment result and the acquisition position of the corresponding operation parameter. Through multi-parameter fusion and vibration identification, real-time monitoring of the operation state of the pneumatic valve is realized. Environment noise is de-noised, so that the detection precision and the anti-interference capability are improved; a threshold value is dynamically set in combination with gas types and historical data, and the self-adaptability is enhanced; and the position of a gas leakage point can be quickly determined through the fault judging and positioning module.

A hydraulic retarder pneumatic control system based on an electromagnetic valve comprises an air source and an oil pool shell, the air source is sequentially connected with a pilot valve and a first inlet of a pneumatic valve in series, and the air source is further communicated with a second inlet of the pneumatic valve; an outlet of the pneumatic valve is connected in series with at least two parallel solenoid valves, outlets of the solenoid valves are connected in series with a quick discharge valve, and a first outlet of the quick discharge valve is communicated with the oil pool shell. Through reasonable arrangement of component structures and design of a pilot valve, no back pressure resistance exists during starting, the reversing resistance is small, and the system response time is greatly prolonged; and meanwhile, the electromagnetic valve is located behind the pneumatic valve, so that the starting backpressure is small, the starting power is small, quick response of work of the retarder is integrally achieved, the work response time is shortened, the cost is reduced, the overall stability of the system is improved, and the service life is prolonged.

The invention relates to the technical field of equipment control, in particular to an automatic control system and method for a pneumatic control valve, and the method comprises the steps that a displacement sensing module collects a valve element displacement signal through a magnetostrictive sensor and carries out Kalman filtering processing; the signal conditioning module fuses displacement and pressure data by adopting a fuzzy logic rule; the intelligent conversion module performs state identification by using a support vector machine algorithm; the communication gateway module realizes data protocol encapsulation and transmission; the state diagnosis module performs fault diagnosis based on a hidden Markov model; the digital twin module realizes simulation prediction through multi-domain physical modeling; the optimization decision module adopts a particle swarm optimization algorithm to generate a control instruction; and the closed-loop execution module drives the execution mechanism and feeds back displacement data. The problem that an existing pneumatic valve is insufficient in control precision due to lack of displacement feedback is solved, and real-time monitoring and high-precision closed-loop control over the position of the valve are achieved.

A pump head for a pneumatic system is provided. The pump head including a head portion and an adapter with a main bore designed to receive a valve, the main bore providing alignment for the valve. The adapter is sealingly and removably coupled to the head portion. The pump also includes a plurality of holes in the adapter component circumscribing the main bore, each hole containing a spherical element biased inward by a biasing member. The spherical elements are configured to engage with a complementary groove on the valve to lock the valve in place. The pump head further includes an inflation pin coaxial with the main bore and sealingly fixed to the adapter. At least a portion of the plug is configured to be received into the inflation pin when the valve is received by the adapter.

A vacuum lifting arrangement having a lifting tube and a suction foot for engaging with an object to be lifted, is disclosed, said vacuum lifting arrangement having a pneumatic valve fluidly connected to ambient air, wherein, during operation of the vacuum lifting arrangement, when an object is not engaged with the suction foot, an air-flow from the suction foot into the lifting tube is prevented by the valve which is in a closed position, and, upon generation in the suction foot of a pressure lower than the surrounding pressure, e.g. due to engagement with an object to be lifted, the valve will be in an open position, allowing an-air flow from the suction foot into the lifting tube. A lifting tube comprising a pneumatic valve for use in the lifting arrangement is also disclosed.

The invention relates to a comprehensive hydrogen supply system based on a 45MPa compressor and a control method.The hydrogen supply system comprises a hydrogen long pipe trailer, the hydrogen compressor, a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank, a high-pressure hydrogen storage tank and a hydrogen adding machine, and the hydrogen compressor is connected with the hydrogen long pipe trailer through a hydrogen discharging pipeline; the hydrogen discharging pipeline is provided with a first hydrogen discharging pneumatic valve and a second hydrogen discharging pneumatic valve, the second hydrogen discharging pneumatic valve is connected with a third hydrogen discharging pneumatic valve in parallel, the third hydrogen discharging pneumatic valve is connected with a pressure regulating valve in series, and the hydrogen compressor is correspondingly connected with a low-pressure hydrogen storage tank, a medium-pressure hydrogen storage tank and a high-pressure hydrogen storage tank through a low-pressure hydrogen storage pipeline, a medium-pressure hydrogen storage pipeline and a high-pressure hydrogen storage pipeline. The hydrogenation machine is correspondingly connected with the low-pressure hydrogen storage pipeline, the medium-pressure hydrogen storage pipeline and the high-pressure hydrogen storage pipeline through the low-pressure hydrogenation pipeline, the medium-pressure hydrogenation pipeline and the high-pressure hydrogenation pipeline, the hydrogenation machine is connected with a hydrogenation gun through a hydrogenation hose, and the hydrogen storage system has the advantages of being simple in structure, high in functionality and good in adaptability; the control method has the advantages of being simple in process, stable and reliable.

The utility model discloses a pneumatic valve with a bottom-mounted air path accessory. The pneumatic valve comprises a valve main body, a pneumatic actuating mechanism, a mounting plate, a pipeline and the air path accessory, the pneumatic actuating mechanism is mounted on the upper side of the valve body; the upper end of the mounting plate is locked between the pneumatic actuating mechanism and the valve body, the lower end of the mounting plate extends to the position below the valve body and is provided with the gas circuit accessory, a plurality of connecting pieces are vertically arranged on the side face of the mounting plate, and a pipeline is connected to the pneumatic actuating mechanism through the gas circuit accessory and the connecting pieces. According to the pneumatic valve with the bottom-mounted gas circuit accessory, the gas circuit accessory is mounted on the lower side of the valve body through the mounting plate, and mounting and overhauling of the gas circuit accessory are facilitated.

The utility model relates to a pilot-operated type pressure balance pneumatic valve which comprises a valve body, a valve cover and a valve rod, and a valve seat is installed at the position of a valve shoulder of the valve body. The valve body is connected with the valve cover through a bolt; a through hole is formed in the center of the valve deck, the valve rod moves up and down along the through hole in the valve deck, and a sleeve is arranged on the upper portion of the valve seat and fixed in the valve body through the valve deck. A valve clack is arranged in the sleeve and moves up and down in the sleeve; a pilot valve core is arranged in the valve clack; a pressure balance disc is arranged on the top of the pilot valve element. The thrust requirements of the valve in the opening, closing, opening process, closing process and semi-opening state are greatly reduced, the opening process and the closing process only need to overcome friction of all parts and can be achieved without overcoming medium pressure, and meanwhile the medium auxiliary sealing effect in the full-closing state of the valve is reserved; while the good sealing performance is met, the opening and closing thrust of the valve is reduced, the operability of the valve is improved, and the requirement for an actuator is reduced.

The utility model provides an anti-impact unpowered membrane water purification system and relates to the technical field of water treatment. The utility model provides a water purification system. The water purification system comprises an ejector (1), a membrane pool (2) and a water production tank (3) which are sequentially communicated, the jet device (1) is communicated with a water distributor (21) of the membrane tank (2) and is used for introducing air into water to be treated to form a gas-solid-liquid mixed solution; power is not needed as a power source, and operation cost is low; electric or pneumatic valve control is not needed, the probability of part damage is reduced, rural discontinuous water use is utilized, water production can be automatically switched to emptying when the water use peak is low, operation and maintenance are simpler, and the service life is longer; large-bubble scouring is realized without air supply of an additional fan, and the surface of the membrane is effectively scoured; the composition is simple and the cost is low; and a three-way valve and a medicine storage box can be arranged to realize unpowered medicine washing.

The utility model discloses a pneumatic valve and a water supply valve, which belong to the field of valves, are used for solving the problem that the opening and closing of the existing valve are delayed, and comprise a valve seat, a liquid path joint, a gas path joint, a piston, a valve rod and an elastic piece, the liquid path joint is provided with a hydraulic channel; the gas circuit connector is provided with a piston cavity, a valve rod cavity, a gas pressure channel and an auxiliary channel. The piston is arranged in the piston cavity in a sliding mode and divides the piston cavity into a first cavity and a second cavity, the first cavity is communicated with the hydraulic channel, and the second cavity is communicated with the valve rod cavity and the auxiliary channel; the valve rod is movably arranged in the valve rod cavity, one end of the valve rod faces the piston, and a plug is arranged at the other end of the valve rod. The elastic piece is arranged between the gas circuit connector and the valve rod and used for driving the valve rod to move in the direction of closing the opening; an airtight piece is arranged between the valve rod and the cavity wall of the valve rod cavity so as to separate the valve rod cavity and the second cavity, and the auxiliary channel is connected with a vacuumizing device.