583 results about "Pneumatic actuator" patented technology

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.

The invention provides a wearable tactile feedback adjusting device used for simulating material surface texture characteristics in real time in a mixed reality environment. The invention relates to a method. The device comprises a U-shaped pneumatic actuator surrounding the fingertip of a user, a fingerstall support for accommodating the fingertip of the user, a resonance actuator located on the fingerstall support and capable of generating vibrotactile feedback to enhance the perceived roughness when the user touches the surface of an object, and a pneumatic control system that can generate a pneumatic drive command to reduce roughness perception when touching the surface of the object. Notably, the fingertip and the finger pulp of the user can still directly touch the surface of the object and cannot be blocked by the U-shaped pneumatic actuator, so that the real texture simulation experience is realized.

The present disclosure relates to systems, devices, and methods for automated fluid transfer. In an embodiment, the present disclosure relates to a system for fluid transfer between a fluid device and a cartridge for cell processing. The system comprises a first portion comprising an instrument head coupled to a gantry, the instrument head comprising a pneumatic actuator, a peristaltic pump, and a gripping feature for receiving the fluid device. The peristaltic pump may be configured to engage compressible fluidic tubing of a fluid pump module of the fluid device to transfer the fluid between the fluid device and the cartridge. The system further comprises a second portion comprising a docking station for receiving the cartridge. In some variations, movement of the pneumatic actuator relative to the fluid pump module causes occlusion of the compressible fluidic tubing of the fluid pump module by the peristaltic pump.

The invention relates to a surge protector withstand voltage test system and method, and belongs to the technical field of surge protectors, the system comprises a test tool, the test tool comprises a tool body, a pneumatic execution component and a PCB function board, the tool body is made of bakelite, metal handles are arranged on the two sides of the tool body, and a detachable cover plate is fixed to the bottom of the tool body through hinges and lock catches; a wiring groove is formed in the inner side of the cover plate; the pneumatic execution component comprises a double-piston cylinder, a slide rail, a clamp assembly and an elastic conductive elastic needle; the double-piston cylinder drives the clamp assembly to linearly move along the X direction through the slide rail so as to clamp the surge protector to be tested; the elastic conductive elastic needle is fixed on the clamp assembly, the head of the elastic conductive elastic needle is in elastic contact with an exposed contact of the tested surge protector, and the tail of the elastic conductive elastic needle is connected to the PCB function board through a wire; the PCB function board comprises a high voltage constant current source circuit, a multipath relay switching circuit and an MCU control module.

The invention discloses a pneumatic stop valve, belongs to the technical field of valves, and solves the problems that when the pneumatic stop valve acts once per minute at the temperature of 380 DEG C, a valve rod is oxidized and collapsed due to high-temperature filler, the valve rod is abraded by catalyst particles, the valve rod is slightly bent by 0.08 mm due to the pressure difference of 0.5 MPa, sealing and hiding of the valve rod are invalid, and closing lags. Comprising a valve body, a support installed on the valve body through a valve cover, a corrugated pipe fixedly connected into the support, a pneumatic actuator fixedly connected to the upper end of the support and a valve rod, the valve rod is connected into the corrugated pipe in a sliding mode, and the upper end of the valve rod is in transmission connection with the movable end of the pneumatic actuator. All the structures keep efficient sealing, the displacement direction of all the structures is limited, meanwhile, the displacement and strain data of the valve rod are monitored, the bending amount is calculated through multi-source data fusion for position compensation, and meanwhile the pneumatic execution module is controlled to complete S-curve optimized valve opening and closing actions.

The invention discloses a modified thermoplastic solid-solution anticorrosive coating, a preparation method thereof and application of the modified thermoplastic solid-solution anticorrosive coating on the surface of a pneumatic actuator, and belongs to the field of industrial equipment surface protection materials. Two novel modifiers are designed to construct a multi-protection system. Wherein the layered double hydroxide-silane covalent grafting modifier takes magnesium-aluminum layered double hydroxide as a matrix, and after covalent modification by a silane coupling agent, the matrix is compounded with a quinoline derivative in an intercalation manner, so that the interface bonding and barrier properties are improved; according to the polyaniline-graphene covalent grafting modifier, few layers of graphene and polyaniline are copolymerized and then grafted with a polyurethane prepolymer, so that the toughness and the conductive corrosion resistance of a coating are enhanced. The coating is prepared by taking polyethersulfone as a matrix, compounding the modifier, nano silicon dioxide and other components, mixing, dissolving, dispersing at a high speed and ultrasonically defoaming. The coating has the advantages of high interface adhesion, strong corrosion resistance, dynamic fatigue resistance, environmental protection, no solvent and the like, and is suitable for surface protection of key components such as a pneumatic actuator shell.

The improved pneumatic actuator comprises a first shell and a second shell which are detachably assembled together, and an inner cavity is formed after the first shell and the second shell are assembled; the air tap is arranged on the first shell and partially extends into the inner cavity; the device further comprises a driving rod, the driving rod extends into the inner cavity from one side of the second shell, the part, located in the inner cavity, of the driving rod is provided with a piston, the side, facing the second shell, of the piston is provided with a spring, and at least one end of the spring is arranged on an adjusting gasket. A diaphragm is arranged on the side, facing the first shell, of the piston, a sealed air cavity is formed between the diaphragm and the first shell, and the inner end of the air nozzle is communicated to the air cavity. According to the improved pneumatic actuator, the main shell is of a two-half type detachable assembly structure, the main shell can be conveniently disassembled to replace and adjust the internal structure, springs with different elastic coefficients can be conveniently replaced, and therefore the improved pneumatic actuator can be better matched with different operation target working conditions of a supercharger.

A valve assembly for a pneumatic system of a vehicle, in particular a commercial vehicle, including: an outlet valve assembly for venting the pneumatic system, a control device for operating the valve assembly in order to admit and release air to and from a pneumatic actuator, wherein the control device is configured to output, to the outlet valve assembly, a switching signal for switching the outlet valve assembly, and, via the switching signal, the outlet valve assembly can be switched to a noise-reducing first venting mode or a quick-venting second venting mode.

The invention discloses an air supply method and an air supply system for a pulsating type ventricular assist device. The air supply method comprises the following steps: setting working parameters of the pulsatile ventricular assist device; the stroke range of the piston in the air pump is determined according to the working parameters; obtaining a piston position piecewise function based on the stroke range; the piston is driven to be at the working zero point, the air pump communicates with the pre-inflation equipment through the pre-inflation pipeline, the air pump is inflated through the pre-inflation equipment, and air pump pressure initialization is completed; and the pre-inflation equipment is disconnected, the air pump is communicated with the pneumatic execution part through the air supply pipeline, a piston in the air pump reciprocates according to the determined piston position piecewise function, the pressure in the air pump is periodically changed, and the pneumatic execution part is periodically and intermittently driven to work according to the sequence of inflation, high-pressure keeping, deflation and low-pressure keeping. The problem of air supply of a balloon, an extracorporeal membrane cavity and the like of an existing pulsatile ventricular assist device is solved.

The utility model relates to a buffer device of an actuating mechanism. The buffer device comprises a pneumatic actuator, a buffer block, an energy accumulator, a buffer shell, a buffer piston and a buffer spring, the pneumatic actuator comprises an actuator shell, an actuator upper cover, an actuator piston and an actuator push rod; the actuator piston can axially slide along the inner wall of the actuator shell; a plurality of actuator guide shafts are arranged between the actuator upper cover and the actuator piston; the actuator piston is fixedly connected with the actuator push rod; the buffer block is fixed to the lower end of the actuator shell, and a closed air storage space is formed between the buffer block and the actuator piston. The buffer block is provided with an exhaust port which can be controlled to be opened and closed; the actuator push rod penetrates through the buffer block and is in sliding fit with the buffer block; the buffer shell limits the maximum stroke of downward movement of the actuator piston. The buffer piston is annular and is arranged between the actuator push rod and the buffer shell in a sleeved mode, the upper portion of the buffer piston abuts against the actuator piston, the lower portion of the buffer piston is communicated with an oil discharge channel embedded in the buffer block, and the oil discharge channel is communicated with the hydraulic energy accumulator.

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 utility model discloses a quick exhaust gas circuit structure which comprises a pneumatic actuator, the pneumatic actuator is connected with a one-way valve, a pneumatic control valve and a shut-off valve, a second electromagnetic valve is arranged on the one-way valve, the one-way valve is connected with a three-way valve, and the three-way valve and the pneumatic control valve are both connected with a first electromagnetic valve and a filtering pressure reducing valve. When the air cylinder needs to be fed with air, the first electromagnetic valve is powered on, the air source passes through the first electromagnetic valve, the air control valve is controlled to be communicated with an air path, and the air source enters the filtering pressure-reducing valve to be subjected to pressure reduction, the first electromagnetic valve and the air control valve are in a closed state, and an interface 1 and an interface 2 in the three-way valve are used for ventilation, so that air cannot be fed at the moment; the first electromagnetic valve is powered on, and the air source passes through the first electromagnetic valve to control the air control valve to be communicated with the air path; an air source enters from the pneumatic control valve, the second electromagnetic valve is not powered on, and the one-way valve cannot flow back. The quick exhaust gas circuit structure is used for a single-action cylinder, realizes emergency opening and closing, and accelerates the exhaust time of the cylinder.

A positioner for a pneumatic actuator for actuating a control instrument, such as a control valve, of a process plant, may include an electropneumatic converter, such as a current-pressure converter; a circuit board which carries supply electronics for the electropneumatic converter a casing which comprises at least one electronics compartment in which at least one electronic component of the positioner, in particular the supply electronics, is accommodated, and a converter compartment, in which the electropneumatic converter is accommodated. The electronics compartment and the converter compartment may be spatially separated from one another. The converter compartment may be delimited at least partially by the circuit board.

The invention discloses a double-acting shifting fork type pneumatic actuator, and relates to the technical field of actuators. Comprising a box body and a rotating shaft, the rotating shaft is provided with a shifting fork with a sliding groove, the buffering assembly comprises a hollow buffering ring located between the rotating shaft and the shifting fork, and the buffering ring is fixedly connected with the shifting fork and is slidably connected with a pushing ring through a plurality of guide rods. The lubricating assembly comprises lubricating boxes located on the two sides of the sliding groove and provided with a plurality of extrusion holes, and extrusion boxes communicated with the extrusion holes and an adjusting assembly are arranged in the lubricating boxes. The adjusting ring is connected with the buffering ring in a sliding mode and fixedly connected with the guide rod, the extrusion box communicates with the buffering ring through a guide pipe, and vibration and abrasion of a shifting fork groove and a sliding block are reduced through impact force of multi-stage buffering fluid and lubrication.

The invention relates to a bidirectional sealing pneumatic butterfly valve which is mainly composed of a valve body, a valve rod, a butterfly plate, a valve seat, an air source, a pneumatic actuator and the like. A first air bag assembly is arranged in the butterfly plate, a second air bag assembly is arranged in the valve seat, the valve body is provided with an air connector communicated with an air source and the second air bag assembly, and the two air bag assemblies are communicated when the butterfly plate is closed. The air bag assembly is filled with high-pressure air provided by the air source, and bidirectional sealing of the butterfly plate and the valve seat is achieved. Meanwhile, cleaning paddles are arranged on the two sides of the butterfly plate, and fluid drives the butterfly plate to rotate to clean attachments on the butterfly plate when the valve is opened. The butterfly valve prevents frictional wear between the butterfly plate and the valve seat through air bag sealing, improves the sealing effect and prolongs the service life; the performance of the butterfly plate is guaranteed by cleaning paddles; the sealing performance can be recovered quickly, the structure is simple, installation and maintenance are convenient, practicability and economical efficiency are high, and the device is suitable for industrial pipeline system flow control and cut-off.

The invention relates to the technical field of vibration suppression, and discloses a multi-physics field cooperative control intelligent vibration suppression method and system, and the method comprises the following steps: S1, building a multi-physics field digital twinborn model based on a finite element analysis method, the multi-physical field at least comprises a coupling relationship among a pneumatic field, an electromagnetic field and a structural field, and the modeling of the fluid-structure interaction effect is included; and S2, based on the digital twin model, an improved particle swarm optimization algorithm is adopted to generate a control weight distribution scheme, and the control weight distribution scheme is used for dynamically adjusting the output proportion of a pneumatic actuator and an electromagnetic actuator. According to the method, the multi-physical field digital twinborn model containing the coupling relation of the pneumatic field, the electromagnetic field and the structural field and taking into account the fluid-solid coupling effect is established, so that the problem that the control precision is limited due to the fact that a single physical field control strategy is mostly adopted in a traditional vibration suppression method is solved.

The invention belongs to the technical field of valves, and discloses a single-action pneumatic actuator control system which comprises a gas supply gas circuit, a pneumatic pilot valve, a first electromagnetic valve, a pilot loop and a delayed discharge loop. And the delayed discharge loop is configured to discharge the air pressure in the control air cavity, and after a preset time, the air pressure is gradually reduced to be below a set value so as to cut off the pneumatic pilot valve. During power failure in a whole platform range, the time-delay discharge loop can enable the whole control system to automatically switch into a pure pneumatic time-delay mode, so that the situation that the BDV immediately enters an open state due to power loss of the first electromagnetic valve is avoided, and the environmental adaptability and long-term operation reliability of the control system under extremely severe environments such as an ocean platform and flammable and explosive environments are remarkably improved; the safety performance is improved.

A vacuum system comprises at least a pneumatic positioning device comprising a mount configured to hold an effecting element and a pneumatic actuator connected to the mount. A control valve is connected to the pneumatic actuator and to a fluid supply. A fluid sensor measures the pressure of the pneumatic actuator. A method includes applying a controlling signal to the control valve to vary the pressure of the pneumatic actuator and move the mount from a starting position to an end position, monitoring the pressure of the pneumatic actuator by the fluid sensor, determining when the mount arrives at the end position, and deriving the controlling parameters based on processing a set of observed parameters, wherein the set of observed parameters comprises at least the controlling signal, the varying pressure, and arrival information of the mount at the end position.

The utility model relates to the technical field of pneumatic control systems, in particular to a single-action pneumatic PST system, which comprises a pneumatic actuating mechanism, a cam valve and an explosion-proof junction box, a valve position transponder is arranged at the front end of the pneumatic actuating mechanism, one end of the cam valve is communicated with a filtering pressure reducing valve, one end of the filtering pressure reducing valve is communicated with a safety valve, and the other end of the filtering pressure reducing valve is communicated with an explosion-proof junction box. And one end of the explosion-proof junction box is connected with a first electromagnetic valve and a second electromagnetic valve respectively. According to the improved single-action pneumatic PST system, the first electromagnetic valve, the hand-operated direction valve and the second electromagnetic valve are adopted, and when the single-action pneumatic PST system is used, flexible control can be conducted when the single-action pneumatic PST system faces complex working conditions and different operation requirements; the explosion-proof junction box and the energy accumulator are adopted, when the single-action pneumatic PST system is used, the electrical safety of the system in a dangerous environment can be guaranteed, meanwhile, the pressure of the system can be kept within a relatively stable range, and the stability of the system during use is improved.

Systems and method describe an actuator control system for controlling an intelligent actuated nose bridge on a pair of wearable glasses. The actuator control system receives a set of measurement data corresponding to a length of the nose bridge, generates a predicted set of measurement data for the length of the nose bridge, transmits the predicted set of measurement data to pneumatic actuators coupled to the nose bridge, captures a first set of images of the nose bridge, generates an augmented set of measurement data for the nose bridge, generates an adjusted set of measurement data based on the predicted set of measurement data and the augmented set of measurement data, and transmits the adjusted set of measurement data to the pneumatic actuators coupled to the nose bridge.

The invention discloses a health degree estimation method for a pneumatic actuator. According to the invention, system identification is carried out at a stable working point and a discrete state space model is obtained. And comprehensively considering disturbance and excitation signals and the health condition of the actuator, and constructing a discrete state space expression form suitable for the augmented Kalman filter. The health information is modeled as an unknown input disturbance variable and is taken as part of a state variable. And an augmented Kalman filter is adopted to carry out combined prediction on the system state quantity and the unknown input interference quantity. And maintaining the acquired control input sequence and the unknown input disturbance variable sequence output by the filter by adopting a sliding window mechanism, and obtaining an estimated value of a health matrix of the pneumatic actuator by adopting a least square method for a data sequence in a window. And finally, performing feature extraction and analysis on the health matrix estimation value to realize real-time evaluation and dynamic tracking of the health state of the pneumatic actuator. According to the method, accurate, stable and real-time health degree information can still be provided under the condition that the pneumatic actuator has faults, disturbance or model mismatch, and powerful technical support is provided for fault-tolerant control and predictive maintenance of a complex system.

The pneumatic actuator assembling device for the turbocharger comprises a check ring tool used for installing a shaft check ring, the check ring tool can be screwed on an actuator base through threads and pressed inwards, so that an installation groove in an actuator shaft is exposed, the shaft check ring is installed, and operation is convenient; the device further comprises an actuator upper cover assembly tool used for installing an actuator upper cover. The utility model provides a pneumatic actuator assembling device for a turbocharger, which is specially used for assembling a retainer ring for a shaft of a pneumatic actuator and an upper cover of the actuator, is convenient to operate, and can well improve the assembling efficiency, save manpower and time and improve the competitiveness of enterprise products.

A robot includes a pneumatic actuator unit with a bistable flexible device that improves the force and energy output capability of the robot. The flexible device is selectively configurable for setting the actuator unit in a contracted state or an extended state based on a fluid pressure within the actuator unit. The robot locomotes within a pipe structure by selectively inflating and deflating each respective actuator unit according to a periodic pressure command cycle.

The invention discloses a slow-start pneumatic switch valve device for trichlorosilane feeding, and belongs to the technical field of material preparation process valves. Comprising a switch valve and a pneumatic actuator, linear motion of a piston rod is converted into rotation fine adjustment through a swing arm rotation compensation mechanism, a solid / microgroove sealing ring and a sliding cavity wall are always kept on a theoretical contact line, abrasion microgaps are automatically compensated, zero-clearance sliding in the whole life cycle is achieved, and manual clearance adjustment is avoided; the solid sealing ring adopts surface-surface contact, so that the unit pressure is reduced by more than 50%, and the wear rate is obviously reduced; the omega-shaped groove of the microgroove sealing ring converts solid particles (10-50 microns Si) into groove edge elastic sealing, and the wear rate is reduced by 40% again; a sealing surface is provided with a uniform oil film, the dynamic and static friction coefficient difference is reduced, crawling / jumping in a 0-20% opening low-speed stage is eliminated, true slow starting is achieved, the water hammer effect during trichlorosilane feeding is avoided, the sealing surface is provided with the uniform oil film, the dynamic and static friction coefficient difference is reduced, and crawling / jumping in the 0-20% opening low-speed stage is eliminated.

Systems and methods herein describe an actuator control system for controlling intelligent actuated temple tips of a pair of eyeglasses. The actuator control system receives a set of measurements corresponding to a length of eyeglass temple tips on a pair of eyeglasses, receives, from a user of the pair of eyeglasses, user feedback corresponding to a position of the eyeglass temple tips, generating a predicted set of measurements for the length of the eyeglass temple tips using a machine learning model, and transmits the predicted set of measurements to pneumatic actuators coupled to the eyeglass temple tips.

A method of monitoring a device that includes a soft pneumatic actuator and a gas pump, the soft pneumatic actuator configured to actuate, assist and / or resist a movement of a body part. The method includes measuring the pressure of a fluid in the internal chamber of the soft pneumatic actuator. The pressure measurement or measurements is / are used to estimate anyone or any combination of: the volume of the internal chamber; the three-dimensional position, shape, and / or displacement of the soft pneumatic actuator; and the force delivered by the soft pneumatic actuator.

The utility model provides a kind of pneumatic ultralow temperature ball valve and automatic LNG loading sled, it is related to cryogenic valve technical field, including valve main body and pneumatic actuator, the valve main body includes valve body, valve stem, valve cover, ball and drip tray, wherein: the valve cover is connected with the valve body, the ball is arranged in the valve body and can rotate under the drive of the valve stem, the valve stem is arranged in the through channel formed by valve cover and the valve body, one end extends into the valve body and is connected with the ball for controlling medium on-off, the other end is connected with the pneumatic actuator to realize driving;The valve cover is lengthened neck structure and the length of the valve cover is less than 250mm;The drip tray includes three groups, three groups of drip tray are sequentially fixed along the axial direction of the valve cover.The utility model has the beneficial effect of shortening the length of lengthened neck while ensuring the anti-condensation effect, so that the pneumatic ultralow temperature ball valve can adapt to specific working conditions.

The invention discloses a motion monitoring clothing system integrating nano sensing and edge intelligence, which comprises three innovative modules: 1, a nano sensing network: adopting MXene / fibroin composite nano cobweb structure sensors (response sensitivity reaches 2.5 kPa), arranging the sensors in a clothing joint area in a bionic muscle texture manner, and capturing micro strain (0.1-15%) and three-dimensional attitude in real time; 2, a self-adaptive learning engine: carrying a lightweight graph convolutional neural network (GCN), generalizing motion data of athletes in a certain winter sports event into a general model through transfer learning, and realizing that the motion recognition accuracy is greater than or equal to 98.7%; the dynamic feedback system is used for generating tactile prompts through a micro-pneumatic actuator array and correcting dangerous postures. The system breaks through the rigid limitation of traditional exercise monitoring equipment, the stretch rate exceeds 180%, the exercise injury rate can be reduced by 42% according to actual measurement of a professional speed team, and the system has been applied to the fields of competitive training, rehabilitation medicine and the like.

The utility model provides a flow control device with a rotatable pneumatic actuator, which is applied to the technical field of semiconductors, a push rod penetrates through a switching column in a lifting and sliding manner, so that one end of the push rod is arranged in a main body part of a valve cover, the gas actuator further comprises an upper cover and a lower cover which are matched to form a cavity, and the lower cover is provided with a first vent hole communicated with the cavity. The upper cover is provided with a second vent hole communicated with the cavity; the adapter column penetrates through the bottom of the lower cover, and the lower cover is rotatably connected with the adapter column; a clamping block is arranged on the switching column and abuts against the bottom inside the lower cover, and the bottom outside the lower cover abuts against the top of the main body part, so that the lower cover is limited between the clamping block and the main body part, the pneumatic actuator can rotate after the flow control device is installed, the adaptability of the interface of the pneumatic actuator in the non-fixed direction can be improved, and the flow control device is more stable. And the adaptability to a narrow space can be improved.

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.