498 results about "Pneumatic valve" patented technology

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 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 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 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 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 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 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 invention provides a pneumatic valve device, a pneumatic brake system and a commercial vehicle. The pneumatic valve device comprises a first air pressure port used for receiving air source pressure of a lower pressure value; the second air pressure port is used for transmitting trailer braking pressure; the third air pressure port is used for outputting trailer brake control air pressure; the first air pressure port is connected with the third air pressure port through a working cavity of the relay valve; the fourth air pressure port is used for receiving the air source pressure with the higher pressure value; the control end of the energy supply valve is connected with the first air pressure port, an air inlet of the energy supply valve is connected with the fourth air pressure port, an air outlet of the energy supply valve is connected with the second air pressure port, the energy supply valve is constructed to make the air inlet and the air outlet communicated when the pressure of the control end of the energy supply valve is larger than an opening threshold value, and the opening threshold value is smaller than the first pressure value. The air source pressure with the higher pressure value can be introduced into the trailer braking system, the energy storage capacity of the trailer braking system is improved, the trailer braking response time can be shortened, and the whole vehicle braking efficiency is improved.

This invention relates to an anti-condensation conveying structure and method for a deposition apparatus, comprising: a pipe joint with a pneumatic valve at its top and a main pipe body for conveying gas on both sides of the joint; a protective shell coaxially connected to the main pipe body; a flexible heating element spirally and uniformly wound around the outer surface of the main pipe body; an insulation layer filling the space between the main pipe body and the protective shell; an embedded heating element located at the connection between the pipe joint and the pneumatic valve; and a temperature control module electrically connected to and independently controlling the temperature of the flexible heating element and the embedded heating element. The main objective of this invention is to employ a segmented independent temperature control method, setting different temperature compensation ranges based on the heat dissipation characteristics of the main pipe body and the pneumatic valve, eliminating cooling points in various parts of the conveying structure, avoiding condensation and crystallization of the precursor due to localized overcooling, and ensuring batch repeatability and yield of thin film deposition.

The utility model discloses a sludge filter-pressing dehydration device, and relates to the technical field of sludge dehydration equipment. The sludge compressing and dewatering device comprises a homogenizing tank, a squeezing water tank, a blowback gas storage tank, a vacuum pump, a hot air unit and a double-diaphragm filter press, the homogenizing tank is connected with the double-diaphragm filter press through a filter press feeding pump, the squeezing water tank is connected with the double-diaphragm filter press through a squeezing pipeline, the double-diaphragm filter press is connected with a back flushing pipeline, a three-way pneumatic valve is arranged on the back flushing pipeline, a compressed air pipeline is arranged between a back flushing air storage tank and the three-way pneumatic valve, and the back flushing air storage tank is connected with the double-diaphragm filter press. The vacuum pump is connected with the double-diaphragm filter press through a vacuum pipeline, and the hot air unit is connected with the double-diaphragm filter press through a hot air outlet pipeline. According to the sludge filter-pressing dehydration device provided by the utility model, the hot air unit and the vacuum pump are arranged, and the moisture content of sludge is further reduced by virtue of contact between hot air and a filter-pressed sludge cake after filter pressing of the double-diaphragm filter press.

The utility model discloses a semi-automatic lossless tire changer, and relates to the technical field of tire disassembly and assembly of small and medium-sized automobiles and new energy automobiles. The semi-automatic lossless tire dismounting machine comprises a box body, the box body is connected with a tower-shaped backward-tilting type vertical arm through a rotating shaft, a tire pressing shovel is arranged on the outer side of the box body, a tire pneumatic lifting frame is arranged on the side, away from the tire pressing shovel, of the box body, a control pedal is arranged at the bottom of the outer surface of the box body, and a first left auxiliary arm and a push-pull arm are arranged at the top of the tower-shaped backward-tilting type vertical arm; a supporting seat is fixedly connected to the outer surface of the box body, a main stand column is arranged in the supporting seat, a first hand-pulling pneumatic valve is arranged at the top of the main stand column, a vertical sliding sleeve is arranged on the outer surface of a push-pull arm, a hexagonal rod is arranged in the vertical sliding sleeve, and a pneumatic overturning dismounting head is arranged at the bottom end of the hexagonal rod; the utility model provides a more stable, safer and more humanized structural design, and safe and lossless disassembly and assembly of tires are carried out.

The utility model relates to a valve assembly table which comprises a working table, an air pump, a pneumatic valve, an air cylinder and a mounting seat, the pneumatic valve is provided with an air inlet pipe, a first air outlet pipe and a second air outlet pipe, the air inlet pipe is connected with the air pump, and the air cylinder is provided with a first air cylinder air inlet, a second air cylinder air inlet, a control rod and a piston rod. A first installation block is arranged at the end of the piston rod and provided with a first vent hole, an air outlet branch pipe is arranged on the first air outlet pipe and connected with the first vent hole, the air outlet branch pipe is provided with an air outlet switch, a second installation block is fixed to the installation base, and a second vent hole is formed in the second installation block. One end, far away from the first installation block, of the second ventilation hole is provided with a ventilation pipe, one side, far away from the first installation block, of the second installation block is provided with a water bucket, and the ventilation pipe extends into the water bucket.

The application discloses a negative pressure variable stiffness driver and a driving system. The negative pressure variable stiffness driver comprises a negative pressure source and a driver body. The driver body comprises a sealed soft bag, an elastic framework and a variable stiffness layer. The elastic framework is embedded in the sealed soft bag, and the variable stiffness layer is fixed on the bag wall of the sealed soft bag. The negative pressure variable stiffness driving system comprises a signal acquisition card, a pneumatic valve and the negative pressure variable stiffness driver. When the variable stiffness layer is pumped, the internal negative pressure of the variable stiffness layer is formed, the stiffness of the variable stiffness layer is increased, the stiffness of the driver body is asymmetric, and the driver body is bent towards the opposite direction; when the sealed soft bag is pumped and the internal air pressure of the variable stiffness layer is restored to the atmospheric pressure, the driver body performs a contraction movement. The driver has a high power-to-weight ratio, similar contraction characteristics and compliance to biological muscles, can realize a multi-directional bending function, and can grasp various types of objects. Meanwhile, the movement of the driver can be characterized by the change of the spring inductance to realize a self-sensing function.

The invention belongs to the technical field of high-pressure gas safety testing, and particularly relates to an integrated control device for an anti-ignition test of an oxygen pressure reducer. Comprising a first pneumatic valve, a preheating device, a steel seamless gas cylinder, a temperature sensor, a temperature controller, a digital pressure gauge, a second pneumatic valve, a pressure transmitter, a pressure gauge, an oxygen filling port, a connector, an EX electric valve and a computer, the steel seamless gas cylinder is arranged in the preheating device, and the temperature controller is placed in the preheating device; one end of the first pneumatic valve is a gas inlet end, and the other end of the first pneumatic valve is communicated with the input end of the steel seamless gas cylinder; the output end of the steel seamless gas cylinder is connected with one end of a second pneumatic valve, and the other end of the second pneumatic valve is connected with an oxygenating port of the tested piece; the joint of the tested piece is connected with the EX electric valve; and the first pneumatic valve, the second pneumatic valve, the digital pressure gauge, the pressure transmitter, the EX electric valve, the temperature sensor and the temperature controller are connected with a computer.

The application belongs to the technical field of material conveying and specifically relates to an integrated material proportioning and mixing conveying system based on weight identification, which comprises a mixing line, the mixing line comprises an A material system, a B material system and a mixer, the A material system comprises a raw material cavity, a conveying pump one, a material conveying pipe, a pneumatic valve one, an A1 tank, an A2 tank, an A auxiliary material pipe, a pneumatic valve two, a pneumatic valve three, a conveying pump two, a pneumatic valve four and a circulating pipe, the pneumatic valve one is connected with the raw material cavity through the material conveying pipe, the conveying pump one is arranged in the material conveying pipe, the A1 tank and the A2 tank are both connected with the pipeline of the pneumatic valve one, the pneumatic valve two is connected with the A1 tank and the A2 tank through the A auxiliary material pipe and is connected with the external A auxiliary material pipeline, and the pneumatic valve three is connected with the bottom pipeline of the A1 tank and the A2 tank, and the device solves the problem that the remaining material in the raw material cavity cannot be quickly stirred and dispersed after solidification when the material is proportioned and mixed at present, thereby ensuring the smooth pumping of the pump body.

The utility model discloses a welding positioning device convenient to operate. The welding positioning device comprises a bottom plate; the first positioning mechanism comprises a first support and a pressing and attaching swing block, and the pressing and attaching swing block is rotationally arranged on the side face of the first support through a first air cylinder on the bottom plate; the second positioning mechanism comprises a second support and a pressing plate, the pressing plate is in butt joint with a second air cylinder, and the second air cylinder drives the pressing plate to move towards the second support; the third positioning mechanism comprises a positioning pin and a positioning sleeve piece which are coaxially arranged, the positioning pin is in butt joint with a third air cylinder, the positioning sleeve piece is in butt joint with a connecting plate on a fourth air cylinder, and an inserting opening is formed in the third positioning mechanism; the air pipe fixing frame is arranged on the bottom plate; and the pneumatic valve is arranged on the edge of the bottom plate. The utility model can solve the problem that the existing welding positioning device is difficult to position a large-size workpiece in multiple directions, so that the local part of the workpiece deforms under the action of gravity or extrusion to influence the welding precision.

A safety device including a pneumatic conductor and a pneumatic valve, the pneumatic conductor configured to be connected at a first end of the pneumatic conductor to the pneumatic valve and the pneumatic conductor configured to be connected at a second end to a second valve, wherein the second valve is configured to be pneumatically connected to an air brake system, wherein the pneumatic valve is opened to activate the air brake system and closed to de-activate the air brake system.

The invention relates to an automatic production device system and a production method. The device system comprises at least one raw material storage tank, a reaction device and a control system, an inlet of each raw material storage tank is connected with a raw material pipeline through a first diaphragm pump and a pneumatic valve; an outlet of each raw material storage tank is connected with a reaction device through a first pneumatic control valve; the control system comprises DCS (Distributed Control System) control units configured for the raw material storage tanks; each raw material storage tank is provided with a first weighing module, and the first weighing module is electrically connected with the DCS control unit of the corresponding raw material storage tank; the pneumatic valves and the first pneumatic adjusting valves are electrically connected with the DCS control units of the corresponding raw material storage tanks respectively and independently. According to the invention, automatically-controlled raw material conveying, accurate weighing and sequential feeding can be realized, so that the production precision and the production efficiency are remarkably improved, and the safety in the production process is improved.

The rock mass sample in-situ preparation device comprises a high-pressure water pump, a controller and a cutting device, the cutting device comprises a rock mass drilling rod, a mixing chamber, a grinding material pipe, a pneumatic valve, a flow deflector, a collimator and a nozzle, and the top of the rock mass drilling rod is connected with the high-pressure water pump; the mixing chamber is located at the bottom of the rock drilling rod; the grinding material pipe is located on one side of the rock mass drilling rod, and the bottom of the grinding material pipe communicates with the mixing chamber; the pneumatic valve is arranged at the joint of the bottom of the grinding pipe and the mixing chamber; the flow deflectors are mounted in the mixing chamber, and the diameters of the flow deflectors are gradually reduced from top to bottom; the top of the collimator tube is communicated with a bottom outlet of the mixing chamber; the nozzle is located at the bottom of the collimator tube, and a four-stage acceleration channel is arranged in the nozzle. According to the rock mass sample in-situ preparation device, the working mode can be automatically adjusted under different rock stratum conditions, representative samples can be rapidly and accurately obtained from rock masses, and the rock mass sample in-situ preparation device is suitable for different types of rock masses.

The utility model discloses a pneumatic valve control device based on an air storage tank and an air source amplifier, and relates to the field of pneumatic valve control devices. A traditional pneumatic valve lacks an effective emergency gas supply guarantee mechanism, the valve cannot be closed rapidly, personnel safety and the production environment are greatly threatened, large resistance exists in the gas transmission and control process, and valve opening and closing response is slow. The pneumatic valve comprises an air filtering pressure reducing valve, an electric valve positioner, a first air source amplifier, a second air source amplifier, a pneumatic actuator, a limit switch, an air storage tank, an electromagnetic valve, a first pneumatic valve, a second pneumatic valve and a valve body. According to the device, the air inflow can be adjusted according to system requirements, stability and accuracy of valve action are guaranteed, quick response of the valve action is achieved, when a gas cut-off fault occurs, a standby gas source of the gas storage tank is automatically switched, the valve is driven to be quickly and accurately closed, and safety accidents possibly caused by out-of-control of the valve are effectively prevented.

This utility model belongs to the field of liquid transportation technology, and specifically relates to a quantitative liquid transportation device. It includes a cavity, a driving fluid circulation mechanism, pneumatic valve I, pneumatic valve II, a storage bottle, a nozzle, and a pneumatic valve control module. The cavity is divided into a left cavity and a right cavity by a diaphragm. The left cavity is filled with a delivery fluid, and the right cavity is filled with a driving fluid. The right cavity is connected to the driving fluid circulation mechanism, which changes the volume of the right cavity by increasing or decreasing the amount of driving fluid, thus changing the volume of the left cavity accordingly. The nozzle is connected to the left cavity via an outlet pipe and pneumatic valve I, and is used to quantitatively deliver the delivery fluid. The storage bottle is connected to the left cavity via an inlet pipe and pneumatic valve II. Both pneumatic valves I and II are connected to the pneumatic valve control module, which controls the on / off state of pneumatic valves I and II. This utility model has a simple structure, small size, fast response, precise control, and good fatigue resistance.