CN215371081U

CN215371081U - Low-power large-flow reversing valve for actuator control

Info

Publication number: CN215371081U
Application number: CN202121743792.3U
Authority: CN
Inventors: 吴伟国; 左俊; 马明
Original assignee: Wuxi Wierxun Fluid Control Technology Co ltd
Current assignee: Wuxi Wierxun Fluid Control Technology Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2021-12-31
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses a low-power large-flow reversing valve for actuator control, which comprises an electromagnetic valve and a pneumatic control valve which are connected with each other, wherein the electromagnetic valve comprises an electromagnetic cavity arranged at the upper part of the electromagnetic valve, a static iron core arranged at the left side in the electromagnetic cavity, a movable iron core arranged at the right side in the electromagnetic cavity, an electromagnetic coil arranged at the periphery of the electromagnetic cavity, an air tap arranged at the right side end of the electromagnetic cavity and a power-on device arranged at the lower part of the electromagnetic valve, and the pneumatic control valve comprises a valve body connected at the left side end of the electromagnetic valve, a piston cavity arranged at the communication part of the valve body and the air tap, a piston arranged in the piston cavity, a valve core connected at the right side end of the piston, and an A hole and a B hole which are arranged at the upper end of the valve body. In a word, the utility model has the advantages of novel structure, convenient use, low power, large control flow and the like.

Description

Low-power large-flow reversing valve for actuator control

Technical Field

The utility model belongs to the technical field of actuator control, and particularly relates to a low-power large-flow reversing valve for actuator control.

Background

The pneumatic actuator is an actuating device for opening and closing or regulating a valve by air pressure, is also called a pneumatic actuating mechanism or a pneumatic device, but is generally called a pneumatic head. Pneumatic actuators are sometimes also equipped with certain auxiliary devices. Commonly used valve positioners and hand wheel mechanisms. The valve positioner is used for improving the performance of the actuator by utilizing a feedback principle, so that the actuator can realize accurate positioning according to a control signal of the controller. The hand wheel mechanism is used for directly operating the control valve to maintain normal production when the control system has no power supply, no air supply, no output of the controller or failure of the actuating mechanism.

The types and configurations of the adjustment mechanisms of the pneumatic actuators are substantially the same, mainly the actuators are different. Therefore, the pneumatic actuator is divided into an actuator and a regulating valve in the description. The pneumatic actuator consists of two parts, namely an actuating mechanism and a regulating valve (regulating mechanism). And generating corresponding thrust to push the regulating valve to act according to the magnitude of the control signal. The regulating valve is a regulating part of the pneumatic actuator, and generates certain displacement or rotation angle under the action of thrust of the actuating mechanism, so that the flow of fluid is directly regulated.

The pneumatic actuator can simply realize rapid linear circulating motion, has a simple structure, is convenient to maintain, and can be used in various severe working environments, such as explosion-proof requirements, dusty or humid working conditions. However, electric drives with servomotors are advantageous in situations where the forces increase rapidly and precise positioning is required. At present, the reversing valve used for controlling the pneumatic actuator in the prior art has higher power, and is particularly used for the reversing valve of the pneumatic actuator for controlling the large flow, so the utility model designs the low-power large-flow reversing valve for controlling the actuator.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a low-power high-flow reversing valve for actuator control.

The technical scheme provided by the utility model is as follows: a low-power large-flow reversing valve for actuator control comprises an electromagnetic valve and a pneumatic control valve which are connected with each other,

the electromagnetic valve comprises an electromagnetic cavity arranged at the upper part of the electromagnetic valve, a static iron core fixedly arranged at the left side in the electromagnetic cavity, a movable iron core sliding at the right side in the electromagnetic cavity, an electromagnetic coil circumferentially arranged at the periphery of the electromagnetic cavity, an air tap arranged at the right side end of the electromagnetic cavity, and a power-on device arranged at the lower part of the electromagnetic valve and connected with the electromagnetic coil,

the pneumatic control valve comprises a valve body connected to the left end of the electromagnetic valve, a piston cavity arranged at the position where the valve body is communicated with the air tap, a piston arranged in the piston cavity, a valve core connected to the right end of the piston, and a hole A and a hole B arranged at the upper end of the valve body, wherein the hole A is connected with a middle cavity of a piston of the actuator, the hole B is connected with two end cavities of the piston of the actuator, and the right end of the valve core is connected with the right end of the valve body through a return spring.

Furthermore, the electromagnetic coil is an explosion-proof coil, so that the explosion-proof performance is strong, and the work is stable and reliable.

Further, the movable iron core left side end is equipped with and is used for pushing away from the movable iron core the spring of quiet iron core, under the circumstances that solenoid is not electrified, the spring will move the iron core and push away to electromagnetic cavity right side end.

Furthermore, move iron core right side end and be equipped with and be used for blockking up the air cock stopper of air cock, when the spring will move iron core and push away to electromagnetism cavity right side end, the air cock stopper blocks up the air cock, avoids compressed gas to get into the piston chamber through the air cock.

Furthermore, the lower end of the piston cavity is provided with an exhaust port for exhausting compressed gas in the piston cavity, and when the air tap is blocked, air in the piston cavity is exhausted through the exhaust port, so that the piston and the valve core move leftwards under the action of the return spring.

Furthermore, piston sealing ring is arranged at the edge of the piston, so that compressed gas is prevented from leaking from the edge of the piston.

The working principle of the utility model is as follows:

the power-off working principle is as follows: when the electrifying device stops electrifying the electromagnetic coil, the electromagnetic force of the electromagnetic coil disappears, the spring at the left side end of the movable iron core pushes the movable iron core to the left side end of the electromagnetic cavity, the air tap plug at the right side end of the movable iron core blocks the air tap at the right side end of the electromagnetic cavity, the exhaust port of the piston cavity is opened at the moment, the compressed gas in the piston cavity is exhausted, the return spring at the right side end of the valve core pushes the valve core and the piston leftwards, the compressed air of the actuator is introduced into the cavities at the two ends of the piston of the actuator through the hole B, the piston of the actuator is enabled to move inwards to the closing position, and meanwhile, the compressed air in the middle cavity of the piston of the actuator is exhausted through the hole A;

the working principle of electricity obtaining: when the electrifying device is recovered to electrify the electromagnetic coil, the electromagnetic coil generates a magnetic field around the static iron core and the movable iron core, the movable iron core overcomes the thrust of the spring and is attracted with the static iron core under the action of magnetic field force, the air nozzle plug at the right side end of the movable iron core is separated from the air nozzle, compressed air is introduced into the piston cavity through the air nozzle and pushes the piston and the valve core to the right, at the moment, the compressed air of the actuator is introduced into the middle cavity of the actuator piston through the hole A, the actuator piston is enabled to move outwards to the opening position, and meanwhile, the compressed air in the cavities at the two ends of the actuator piston is discharged through the hole B.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a low-power large-flow reversing valve for actuator control, which is characterized in that an electromagnetic valve is combined with a pneumatic control valve, an electromagnetic coil which can generate electromagnetic force when being electrified is arranged at the periphery of a movable iron core and a static iron core, compressed air in a piston cavity in the pneumatic control valve is controlled to be introduced under the suction action of the movable iron core and the static iron core in the electromagnetic valve, a piston and a valve core of a pneumatic controller move left and right under the action of a recovery spring to introduce and lead out the compressed air in the piston cavity of an actuator, and the spring on the movable iron core can move the movable iron core to block an air tap under the condition of power failure of the electromagnetic coil. In a word, the utility model has the advantages of novel structure, convenient use, low power, large control flow and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the solenoid valve of the present invention.

The electromagnetic valve comprises a solenoid valve 1, an electromagnetic cavity 11, a static iron core 12, a movable iron core 13, a spring 131, an air nozzle plug 132, an electromagnetic coil 14, an air nozzle 15, an electrifying device 16, a pneumatic control valve 2, a valve body 21, a piston cavity 22, an exhaust port 221, a piston 23, a piston sealing ring 231, a valve core 24, a hole 25-A, a hole 26-B and a return spring 27.

Detailed Description

For the understanding of the technical solutions of the present invention, the following description is further made in conjunction with the accompanying fig. 1-2 and the specific embodiments, which are not to be construed as limiting the scope of the present invention.

Example (b): as shown in fig. 1, a low-power high-flow reversing valve for actuator control comprises a solenoid valve 1 and a pneumatic control valve 2 which are connected with each other,

as shown in fig. 2, the electromagnetic valve 1 includes an electromagnetic cavity 11 disposed at the upper portion of the electromagnetic valve 1, a stationary iron core 12 fixedly disposed at the left side of the electromagnetic cavity 11, a movable iron core 13 slidably disposed at the right side of the electromagnetic cavity 11, an electromagnetic coil 14 circumferentially disposed at the periphery of the electromagnetic cavity 11, an air faucet 15 disposed at the right side end of the electromagnetic cavity 11, and a power-on device 16 disposed at the lower portion of the electromagnetic valve 1 and connected to the electromagnetic coil 14,

the electromagnetic coil 14 is an explosion-proof coil,

the left end of the movable iron core 13 is provided with a spring 131 for pushing the movable iron core 13 away from the static iron core 12, the right end of the movable iron core 13 is provided with an air faucet plug 132 for plugging the air faucet 15,

as shown in fig. 1, the pneumatic control valve 2 comprises a valve body 21 connected to the left end of the solenoid valve 1, a piston cavity 22 arranged at the position where the valve body 21 communicates with the air tap 15, a piston 23 arranged in the piston cavity 22, a valve core 24 connected to the right end of the piston 23, an a hole 25 and a B hole 26 arranged at the upper end of the valve body 21, wherein the a hole 25 is connected with the middle cavity of the piston of the actuator, the B hole 26 is connected with the two end cavities of the piston of the actuator, the right end of the valve core 24 is connected with the right end of the valve body 21 through a return spring 27,

the lower end of the piston cavity 22 is provided with an exhaust port 221 for exhausting compressed gas in the piston cavity 22, the edge of the piston 23 is provided with a piston sealing ring 231,

the electrical components are not specially designated, and common products sold in the market can be selected as long as the use requirements of the utility model can be met.

The working principle of the embodiment is as follows:

the power-off working principle is as follows: when the electrifying device 16 stops electrifying the electromagnetic coil 14, the electromagnetic force of the electromagnetic coil 14 disappears, the spring 131 at the left side end of the movable iron core 13 pushes the movable iron core 13 to the left side end of the electromagnetic cavity 11, the air tap plug 132 at the right side end of the movable iron core 13 plugs the air tap 15 at the right side end of the electromagnetic cavity 11, at this time, the air outlet 221 of the piston cavity 22 is opened, the compressed gas in the piston cavity 22 is discharged, the return spring 27 at the right side end of the valve core 24 pushes the valve core 24 and the piston 23 leftwards, at this time, the compressed air of the actuator is introduced into the cavities at the two ends of the actuator piston through the hole B26, the actuator piston is moved inwards to the closing position, and at the same time, the compressed air in the middle cavity of the actuator piston is discharged through the hole A25;

the working principle of electricity obtaining: when the electrifying device 16 is electrified again, the electromagnetic coil 14 generates a magnetic field around the static iron core 12 and the movable iron core 13, under the action of the magnetic field force, the movable iron core 13 overcomes the thrust of the spring 131 to attract the static iron core 12, the air tap plug 132 at the right side end of the movable iron core 13 is separated from the air tap 15, compressed air is introduced into the piston cavity 22 through the air tap 15 and pushes the piston 23 and the valve core 24 to the right, at the moment, the compressed air of the actuator is introduced into the middle cavity of the actuator piston through the hole A25, so that the actuator piston moves outwards to an opening position, and meanwhile, the compressed air in the cavities at the two ends of the actuator piston is discharged through the hole B26.

Claims

1. A low-power large-flow reversing valve for actuator control comprises an electromagnetic valve (1) and a pneumatic control valve (2) which are connected with each other, and is characterized in that,

the electromagnetic valve (1) comprises an electromagnetic cavity (11) arranged at the upper part of the electromagnetic valve (1), a static iron core (12) fixedly arranged at the left side in the electromagnetic cavity (11), a movable iron core (13) arranged at the right side in the electromagnetic cavity (11) in a sliding manner, an electromagnetic coil (14) circumferentially arranged at the periphery of the electromagnetic cavity (11), an air tap (15) arranged at the right side end of the electromagnetic cavity (11), and a power-on device (16) arranged at the lower part of the electromagnetic valve (1) and connected with the electromagnetic coil (14),

pneumatic control valve (2) is including connecting valve body (21), the setting of solenoid valve (1) left side end is in valve body (21) with piston chamber (22), the setting of air cock (15) intercommunication department are in piston (23) in piston chamber (22), connection are in case (24), the setting of piston (23) right side end are in A hole (25) and B hole (26) of valve body (21) upper end, A hole (25) are connected with executor piston middle chamber, B hole (26) are connected with executor piston both ends chamber, case (24) right-hand member through answer spring (27) with valve body (21) right side end is connected.

2. A low power high flow reversing valve for actuator control according to claim 1, characterized in that the solenoid (14) is a blow-out coil.

3. A low power high flow reversing valve for actuator control according to claim 1, characterized in that the left end of the movable iron core (13) is provided with a spring (131) for pushing the movable iron core (13) away from the static iron core (12).

4. A low power high flow reversing valve for actuator control according to claim 1, characterized in that the right side end of the movable iron core (13) is provided with an air tap plug (132) for plugging the air tap (15).

5. A low power high flow reversing valve for actuator control according to claim 1, characterized in that the lower end of the piston chamber (22) is provided with a gas outlet (221) for discharging compressed gas in the piston chamber (22).

6. A low power high flow reversing valve for actuator control according to claim 1, characterized in that a piston sealing ring (231) is provided at the edge of the piston (23).