CN115451179A

CN115451179A - Pneumatic locking mechanism of manual valve

Info

Publication number: CN115451179A
Application number: CN202211095824.2A
Authority: CN
Inventors: 陈海; 李益景; 楼云浩; 史百贤
Original assignee: ZHEJIANG SUPCON FLUID TECHNOLOGY CO LTD
Current assignee: ZHEJIANG SUPCON FLUID TECHNOLOGY CO LTD
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2022-12-09

Abstract

The invention provides a pneumatic locking mechanism of a manual valve, which comprises a manual device and a locking device, wherein the manual device comprises a shaft sleeve and a handle, the shaft sleeve is coaxially connected with a valve rod of the manual valve, the handle is connected with one end, far away from the valve rod, of the shaft sleeve, and the shaft sleeve is provided with a limiting groove on the outer wall parallel to the valve rod; the locking device comprises an air cylinder and a lock rod, one end of the lock rod is connected with the output end of the air cylinder, and the other end of the lock rod is matched with the limiting groove. According to the locking mechanism of the pneumatic valve, the locking of the valve is realized through the matching of the cylinder, the lock rod and the shaft sleeve, and the valve can be remotely locked.

Description

Pneumatic locking mechanism of manual valve

Technical Field

The invention relates to the technical field of valve locking mechanisms, in particular to a pneumatic locking mechanism of a manual valve.

Background

The manual valve is a control component in a pipeline fluid conveying system and is used for changing the passage section and the medium flowing direction. The valve may be actuated as desired under the influence of pressure, temperature or other form of sensor signal, or may simply open or close independently of the sensor signal. The valve is driven or automatic to make the opening and closing part move up and down, slide, swing or rotate, so that the flow passage area is changed to realize its control function. For the manual valve, the locking mechanism is matched to limit the opening and closing position of the valve in the operation process. However, the existing locking mechanism is limited only by machinery, real-time monitoring and displaying of the opening and closing position state of the valve cannot be achieved, remote control cannot be achieved, when the limitation needs to be relieved, the whole structure needs to be manually disassembled, operation burden is increased, and operation time is prolonged.

Therefore, the invention provides a pneumatic locking mechanism of a manual valve, which aims to improve the locking mechanism of the manual valve, solve the problems that the valve cannot be remotely controlled and the opening and closing position state of the valve cannot be monitored, and avoid safety accidents caused by misoperation of field personnel.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide a pneumatic locking mechanism of a manual valve.

The pneumatic locking mechanism of the manual valve comprises a manual device and a locking device, wherein the manual device comprises a shaft sleeve and a handle, the shaft sleeve is coaxially connected with a valve rod of the manual valve, the handle is connected with one end, far away from the valve rod, of the shaft sleeve, and a limiting groove is formed in the outer wall, parallel to the valve rod, of the shaft sleeve; the locking device comprises an air cylinder and a lock rod, one end of the lock rod is connected with the output end of the air cylinder, and the other end of the lock rod is matched with the limiting groove.

Preferably, the number of the limiting grooves is four, and the limiting grooves are uniformly distributed along the circumferential direction of the shaft sleeve.

Preferably, the part of the shaft sleeve connected with the handle is a square shaft.

Preferably, a handle pressing sleeve is further arranged on one side, away from the valve rod, of the handle, and the handle pressing sleeve is tightly pressed with the handle through a pressing bolt.

Preferably, the manual device further comprises a mounting bracket, the mounting bracket is connected with the manual valve, and one end of the shaft sleeve, which is far away from the valve rod, penetrates through the mounting bracket.

Furthermore, the locking device further comprises an inner bushing, and the inner bushing is sleeved on the lock rod.

Further, the locking device further comprises a solenoid valve, an inlet of the solenoid valve is connected with an external air source, and an outlet of the solenoid valve is connected with the air cylinder.

Preferably, the cylinder is of a straight stroke magnetic ventilation extension and air loss retraction type.

Preferably, the locking device further comprises a magnetic sensor configured to magnetically sense with the cylinder.

Preferably, the box body is combined by the box cover and the installation box, and the locking device is arranged in the box body.

Compared with the prior art, the invention has the following beneficial effects:

the pneumatic locking mechanism of the manual valve provided by the invention realizes the locking of the valve through the matching of the cylinder, the lock rod and the shaft sleeve, and can remotely lock the valve. The opening and closing position state of the valve can be confirmed through the feedback signal of the explosion-proof magnetic sensor, and misoperation of field personnel caused by unclear opening and closing states of the valve is prevented through remote locking of the valve, so that safety accidents are avoided.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the pneumatic latching mechanism of the manual valve according to the embodiment of the present invention;

fig. 2 is an exploded view of the pneumatic latching mechanism of the manual valve according to the embodiment of the present invention.

Wherein,

1-locking device, 2-manual device, 3-valve, 11-installation box, 12-locking rod, 13-installation plate, 141-joint, 142-air source pipe, 15-air cylinder, 16-electromagnetic valve, 17-magnetic sensor, 18-box cover, 19-inner bushing, 21-installation support, 22-limit bolt, 23-shaft sleeve, 24-handle, 25-handle pressing sleeve and 26-pressing bolt.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.

The invention provides a pneumatic locking mechanism of a manual valve, as shown in fig. 1, the pneumatic locking mechanism of the embodiment is used for the manual valve 3, the pneumatic locking mechanism comprises a locking device 1 and a manual device 2, the manual device 2 is connected with a valve rod of the valve 3, the valve 3 is opened and closed through the manual device 2, the locking device 1 is matched with the manual device 2, the locking device 2 can be locked and limited, the state of the manual device 2 can be indicated, and the opening and closing position of the valve 3 can be monitored.

As shown in fig. 2, the manual device 2 of the present embodiment includes a mounting bracket 21, a shaft sleeve 23, a handle 24, a handle pressing sleeve 25, and a pressing bolt 26, wherein one end of the shaft sleeve 23 is coaxially connected to the valve rod of the valve 3, and the handle 24 is annularly connected to the other end of the shaft sleeve 23. In operation, by grasping the handle 24, a force is applied to the handle 24 to rotate the sleeve 23, which in turn rotates the stem of the valve 3.

The sleeve 23 is stepped along the longitudinal direction, which is the axial direction of the sleeve 23. The shaft sleeve 23 is close to the valve 3 and is provided with a limiting groove on the outer wall parallel to the axial direction of the valve rod, and the part of the shaft sleeve 23 connected with the handle 24 is a square shaft, so that the horizontal or vertical installation of the handle 24 can be realized. The end part of the shaft sleeve 23 far away from the valve 3 is provided with a threaded hole along the axial direction, a compression bolt 26 is meshed in the threaded hole, and a handle pressing sleeve 25 is compressed on the handle 24 through the compression bolt 26, so that the handle 24 cannot fall off from the shaft sleeve 23 when rotating a valve rod of the valve 3. After the valve 3 is opened or closed, the pressing bolt 26 is screwed off, so that the handle pressing sleeve 25 and the handle 24 can be taken off from the shaft sleeve 23, and misoperation is prevented.

The mounting bracket 21 is mounted on a valve body of the valve 3 through a bolt, one end, far away from the valve 3, of the shaft sleeve 23 penetrates through the mounting bracket 21, the handle 24, the handle pressing sleeve 25 and the pressing bolt 26 are arranged on the outer side of the mounting bracket 21, and when the shaft sleeve 23 is rotated through the handle 24, the mounting bracket 21 can support the handle 24. Still be equipped with limit bolt 22 on the installing support 21, limit bolt 22 can carry on spacingly to handle 24's rotation, avoids the pivoted angle too big.

The locking device 1 comprises a cylinder 15, an electromagnetic valve 16, a magnetic sensor 17, a lock rod 12 and an inner bushing 19, wherein the inlet of the electromagnetic valve 16 is connected with an external gas source to introduce external gas; the air cylinder 15 is provided with a joint 141 and an air source pipe 142, and the air cylinder 15 is connected with an outlet of the electromagnetic valve 16 through the joint 141 and the air source pipe 142; the output end of the cylinder 15 is connected with one end of the lock rod 12, and the other end of the lock rod 12 is matched with the limiting groove on the shaft sleeve 23 to lock the shaft sleeve 23.

In this embodiment, the limiting groove of the shaft sleeve 23 is in a four-key groove form, and the four key grooves are uniformly distributed along the circumferential direction of the shaft sleeve 23, so that the valve 3 can be switched between the closed state and the open state only by rotating 90 degrees through the matching of the lock rod 12 and the key grooves. The inner bushing 19 is sleeved on the lock rod 12 and fixedly arranged on the mounting bracket 21, and the inner bushing 19 can support and axially position the lock rod 12, so that the lock rod 12 is prevented from being deformed by stress and the telescopic path is prevented from deviating. The inner liner 19 may be mounted on the mounting bracket 21 by bolts.

The cylinder 15 is a straight-stroke magnetic-ventilation extending and air-loss retracting cylinder, so that the cylinder 15 can drive the lock rod 12 to extend out to lock the valve 3 under the condition of air break and power failure, the leakage of a flow channel medium is prevented, and the safety is guaranteed. The electromagnetic valve 16 is a two-position three-way normally closed explosion-proof electromagnetic valve, and the central control chamber controls the electromagnetic valve 16 to switch gas paths by power-on or power-off to complete the on-off control of the valve 3. The electromagnetic valve 16 is of an explosion-proof type, so that the structure safety is guaranteed.

The magnetic sensor 17 performs magnetic induction with the air cylinder 15 to monitor the state of the valve 3 in real time without additionally adding components such as a feedback rod, and the like, so that the installation space and the energy consumption are saved. The magnetic inductor 17 adopts miniature explosion-proof magnetism.

The pneumatic locking mechanism of the embodiment further comprises a mounting box 11 and a box cover 18, the mounting box 11 and the box cover 18 are combined into a closed box body and are mounted on one side of the mounting bracket 21 through bolts, the locking device 1 is arranged in the mounting box 11, and the air cylinder 15 is connected with the mounting box 11 through a mounting plate 13. In this embodiment, the installation box 11 is L-shaped, so as to avoid interference with the flange surface of the valve 3 and the pipeline while ensuring the installation of the locking device 1. By integrating the locking device 1 in the installation housing 11, the components can be protected from the environment.

The pneumatic locking mechanism of the present embodiment operates as follows: the central control chamber control electromagnetic valve 16 is connected with a power supply to switch a gas circuit, gas of an external gas source enters the cylinder 15 through the electromagnetic valve 16, a gas pressure compression spring in the cylinder 15 drives an internal piston to move to drive the lock rod 12 to retract and to be separated from the shaft sleeve 23, the lock rod 12 retracts to a set position, the magnetic sensor 17 senses and gives an unlocking feedback signal, the handle 24 drives the valve rod of the valve 3 to rotate by rotating the shaft sleeve 23 anticlockwise, and the valve 3 is opened; when valve 3 is required to be closed, handle 24 rotates clockwise to drive valve 3 to close, and the central control chamber cuts off the power of solenoid valve 16, and solenoid valve 16 cuts off the power supply and switches the gas circuit, discharges the gas in cylinder 15 through the gas vent, and the inside spring drive piston motion of cylinder 15, locking lever 12 stretch out, gets into axle sleeve 23 keyway, pins axle sleeve 23 to handle 24 can't rotate valve 3, and magnetic sensor 17 gives out the pinning feedback signal of valve 3 after sensing simultaneously.

The pneumatic locking mechanism of the embodiment not only can remotely lock the valve, but also can confirm the opening and closing position state of the valve through the feedback signal of the magnetic sensor. The pneumatic locking mechanism of the manual valve is particularly suitable for pneumatic locking of a triethyl aluminum feeding manual valve.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The pneumatic locking mechanism of the manual valve is characterized by comprising a manual device and a locking device, wherein the manual device comprises a shaft sleeve and a handle, the shaft sleeve is coaxially connected with a valve rod of the manual valve, the handle is connected with one end, far away from the valve rod, of the shaft sleeve, and a limiting groove is formed in the outer wall, parallel to the valve rod, of the shaft sleeve; the locking device comprises an air cylinder and a lock rod, one end of the lock rod is connected with the output end of the air cylinder, and the other end of the lock rod is matched with the limiting groove.

2. The pneumatic locking mechanism of a manual valve according to claim 1, wherein the number of the limiting grooves is four, and the limiting grooves are uniformly distributed along the circumferential direction of the shaft sleeve.

3. A pneumatically operated latch mechanism as claimed in claim 2, wherein the portion of said sleeve connected to said handle is a square shaft.

4. A pneumatically operated latch mechanism as claimed in claim 3, wherein a handle pressing sleeve is provided on the side of said handle remote from said valve stem, said handle pressing sleeve being pressed against said handle by a pressing bolt.

5. The manual valve pneumatic locking mechanism of claim 1, wherein the manual device further comprises a mounting bracket, the mounting bracket is connected with the manual valve, and one end of the shaft sleeve, which is far away from the valve rod, penetrates through the mounting bracket.

6. A pneumatic latch mechanism for a manual valve according to claim 1, wherein the latch means further comprises an inner sleeve, the inner sleeve being fitted over the locking bar.

7. A pneumatic latch mechanism according to claim 6, wherein the latch means further comprises a solenoid valve, the inlet of the solenoid valve being connected to an external air supply and the outlet of the solenoid valve being connected to the cylinder.

8. A pneumatically operated latch mechanism according to claim 7 wherein said cylinder is of the straight stroke magnetically vented extend and retract type.

9. A pneumatic latch mechanism for a manual valve according to claim 8, wherein the latch means further comprises a magnetic sensor configured to magnetically interact with the cylinder.

10. A pneumatic latch mechanism for a manual valve according to claim 1, further comprising a mounting box and a box cover, wherein the box cover and the mounting box are combined into a box body, and the latch means is disposed in the box body.