CN215568233U

CN215568233U - Valve body structure for closed pressure relief

Info

Publication number: CN215568233U
Application number: CN202120991655.5U
Authority: CN
Inventors: 叶海游; 叶茂; 林微琴; 周谦; 王天贵; 刘海锋; 王西峰
Original assignee: CHINA HUAM DEVELOPMENT TECHNOLOGY CO LTD
Current assignee: CHINA HUAM DEVELOPMENT TECHNOLOGY CO LTD
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2022-01-18
Anticipated expiration: 2031-05-06

Abstract

The utility model provides a seal valve body structure of release, installs in sealed pipeline, installs case, its characterized in that in the valve port department of establishing: the valve comprises an inner valve seat and an outer valve seat, wherein a communicated valve cavity and a piston cavity are arranged in the inner valve seat, the valve cavity is used for installing a valve core, a valve port is positioned at the end part of the valve cavity, a limiting part is fixedly arranged between the piston cavity and the valve cavity, a piston and a disc spring are arranged in the piston cavity, two ends of the piston respectively abut against the disc spring and the limiting part, the disc spring abuts against the end wall of the piston cavity, a pressure relief hole is formed in the side surface of the inner valve seat, the inner end of the pressure relief hole is plugged by the side surface of the piston, an external thread and an external annular groove are respectively arranged on the upper side and the lower side of the pressure relief hole of the inner valve seat, a rubber annular ring is fixedly hooped on the external annular groove, a smooth external cylindrical groove and an internal cylindrical groove with an internal thread are arranged in the outer valve seat, the internal cylindrical groove is in threaded fit with the inner valve seat, the external cylindrical groove is abutted against and sealed by the rubber annular ring, and a low-vacuum negative-pressure cavity can be formed between the internal cylindrical groove and the inner valve seat by rotating and moving the outer valve seat upwards.

Description

Valve body structure for closed pressure relief

Technical Field

The utility model relates to the field of control valves, in particular to a valve body structure for closed pressure relief.

Background

Control valves are often installed in liquid or gas flow pipelines to control flow direction, flow rate, internal pressure, etc., wherein safety valves for relieving overload are installed to ensure more efficient and safe operation of the pipelines.

At present, the safety valve for relieving the overload internal pressure discharges contents in an overflow mode to reduce the internal pressure of a pipeline, but the discharged contents are small in quantity or small in occupied space, and the safety valve is connected with a return pipeline to be too waste.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a valve body structure for closed pressure relief, which comprises:

the utility model provides a seal valve body structure of release, installs in sealed pipeline, installs case, its characterized in that in the valve port department of establishing: comprises an inner valve seat and an outer valve seat, a valve cavity and a piston cavity which are communicated are arranged in the inner valve seat, the valve cavity is used for installing a valve core, the valve port is positioned at the end part of the valve cavity, a limit part is fixedly arranged between the piston cavity and the valve cavity, a piston and a disc spring are arranged in the piston cavity, two ends of the piston respectively abut against the disc spring and the limit part, the disc spring is pressed against the end wall of the piston cavity, the side surface of the inner valve seat is provided with a pressure relief hole, the inner end of the pressure relief hole is sealed by the side surface of the piston, the inner valve seat is respectively provided with an external thread and an outer ring groove above and below the pressure relief hole, the outer ring groove is fixedly hooped with a rubber ring, a smooth outer cylindrical groove and an inner cylindrical groove with internal threads are arranged in the outer valve seat, the inner cylindrical groove is in threaded fit with the inner valve seat, the outer cylindrical groove is propped against and sealed by the rubber ring, a low vacuum negative pressure chamber can be formed between the inner cylindrical groove and the inner valve seat by rotating the outer valve seat to move up.

Preferably, the outer valve seat is connected with a flange plate at the outer end of the outer cylindrical groove through a bolt, the inner valve seat is located on the inner side of the flange plate and is in threaded fit, and the stability of the action of the outer valve seat is improved.

Preferably, the outer valve seat is further provided with a flow guide channel, one end of the flow guide channel is communicated with the pressure relief hole, the other end of the flow guide channel is communicated with the upper end face of the outer valve seat, and the speed of pressure relief to the negative pressure cavity is increased.

Preferably, the side surface of the piston is fixedly covered with an asbestos packing, so that the piston can flexibly act, and meanwhile, the pressure relief hole is well sealed.

Preferably, the outer valve seat is further provided with a drainage port communicated with the inner cylindrical groove, the drainage port is provided with a gate valve for closing, and after the inclined pressing is finished, the content in the negative pressure cavity can be discharged through the drainage port.

Preferably, the valve further comprises a hand wheel, the hand wheel is coaxially fixed with the outer valve seat, and the hand wheel can be used for manually controlling the action of the outer valve seat.

Preferably, the valve seat further comprises a motorized device, wherein the motorized device consists of a motor and a transmission assembly, the transmission assembly is used for the transmission connection of the motor and the outer valve seat, and the motor can control the action of the outer valve seat.

The utility model has the following beneficial effects: the outer valve seat is rotated and moved upwards in advance, a low-vacuum negative pressure cavity is formed between the inner cylindrical groove and the inner valve seat, the outer valve seat and the inner valve seat which are in threaded fit with each other can maintain the state of the negative pressure cavity, when the internal pressure of the pipeline is too large to jack the piston and open the pressure relief hole, the content of the pipeline can be quickly relieved to the negative pressure cavity, and after the internal pressure suddenly drops, the piston returns to seal the pressure relief hole through a disc spring.

Drawings

Fig. 1 is a schematic structural view of embodiment 1.

Fig. 2 is a schematic structural view of embodiment 2.

Fig. 3 is a schematic view of the piston structure of

embodiment

1 or 2.

Fig. 4 is a schematic view of the pressure relief principle of

embodiment

1 or 2.

1. A valve port; 2. a valve core; 3. an inner valve seat; 4. an outer valve seat; 5. a valve cavity; 6. a piston end; 7. a limiting part; 8. a piston; 9. a disc spring; 10. a pressure relief hole; 11. an outer ring groove; 12. a rubber ring; 13. an outer cylindrical groove; 14. an inner cylindrical groove; 15. a negative pressure chamber; 16. a flange plate; 17. a flow guide channel; 18. asbestos packing; 19. A drainage port; 20. a gate valve; 21. a hand wheel; 22. a motor; 23. a transmission assembly; 24. a spring.

Detailed Description

The present invention will be further described with reference to FIGS. 1 to 4 and examples 1 and 2.

Example 1:

the utility model provides a seal valve body structure of release, installs in sealed pipeline, installs case 2, its characterized in that in the 1 department installation valve port of establishing: the valve comprises an inner valve seat 3, an outer valve seat 4 and a hand wheel 21, wherein a communicated valve cavity 5 and a piston 8 cavity are arranged in the inner valve seat 3, the valve cavity 5 is used for installing a valve core 2, a valve port 1 is positioned at the end part of the valve cavity 5, a limiting part 7 is fixedly arranged between the piston 8 cavity and the valve cavity 5, a piston 8 and a disc spring 9 are arranged in the piston 8 cavity, two ends of the piston 8 respectively abut against the disc spring 9 and the limiting part 7, the disc spring 9 abuts against the end wall of the piston 8 cavity, a pressure relief hole 10 is arranged on the side surface of the inner valve seat 3, the inner end of the pressure relief hole 10 is sealed by the side surface of the piston 8, an asbestos packing 18 is fixedly covered on the side surface of the piston 8, the piston 8 can flexibly act, meanwhile, a good sealing effect on the pressure relief hole 10 is achieved, a flow guide channel 17 is also arranged on the outer valve seat 4, one end of the flow guide channel 17 is communicated with the pressure relief hole 10, the other end of the flow guide channel is communicated with the upper end surface of the outer valve seat 4, an external thread and an external ring groove 11 are respectively arranged on the upper part and the upper part of the pressure relief hole 10 of the inner valve seat 3, the fixed hoop of outer annular groove 11 is equipped with rubber ring 12, is equipped with smooth outer cylindrical groove 13 and has internal screw thread inner cylindrical groove 14 in the outer disk seat 4, and inner cylindrical groove 14 and the interior disk seat 3 screw-thread fit, outer cylindrical groove 13 lean on by rubber ring 12 top to seal, can form low vacuum negative pressure chamber 15 between inner cylindrical groove 14 and interior disk seat 3 through rotatory outer disk seat 4 that moves up.

The outer valve seat 4 is connected with a flange 16 at the outer end of the outer cylindrical groove 13 through a bolt, the inner valve seat 3 is positioned on the inner side of the flange 16 and is in threaded fit, the stability of the action of the outer valve seat 4 is improved, the outer valve seat 4 is further provided with a drainage port 19 communicated with the inner cylindrical groove 14, the drainage port 19 is provided with a gate valve 20, and after the inclined pressing is completed, the contents in the negative pressure cavity 15 can be discharged through the drainage port 19.

The hand wheel 21 is coaxially fixed with the outer valve seat 4, and the action of the outer valve seat 4 can be manually controlled through the hand wheel 21.

Example 2:

the utility model provides a seal valve body structure of release, installs in sealed pipeline, installs case 2, its characterized in that in the 1 department installation valve port of establishing: the valve comprises an inner valve seat 3, an outer valve seat 4 and a motor-driven device, wherein a communicated valve cavity 5 and a piston 8 cavity are arranged in the inner valve seat 3, the valve cavity 5 is used for installing a valve core 2, a valve port 1 is positioned at the end part of the valve cavity 5, a limiting part 7 is fixedly arranged between the piston 8 cavity and the valve cavity 5, a piston 8 and a disc spring 9 are arranged in the piston 8 cavity, two ends of the piston 8 respectively abut against the disc spring 9 and the limiting part 7, the disc spring 9 abuts against the end wall of the piston 8 cavity, a pressure relief hole 10 is arranged on the side surface of the inner valve seat 3, the inner end of the pressure relief hole 10 is sealed by the side surface of the piston 8, an asbestos packing 18 is fixedly covered on the side surface of the piston 8, the piston 8 can flexibly act and has a good sealing effect on the pressure relief hole 10, a flow guide channel 17 is also arranged on the outer valve seat 4, one end of the flow guide channel 17 is communicated with the pressure relief hole 10 and the other end thereof is communicated with the upper end surface of the outer valve seat 4, an external thread and an external ring groove 11 are respectively arranged on the upper part and the lower part of the pressure relief hole 10 of the inner valve seat 3, the fixed hoop of outer annular groove 11 is equipped with rubber ring 12, is equipped with smooth outer cylindrical groove 13 and has internal screw thread inner cylindrical groove 14 in the outer disk seat 4, and inner cylindrical groove 14 and the interior disk seat 3 screw-thread fit, outer cylindrical groove 13 lean on by rubber ring 12 top to seal, can form low vacuum negative pressure chamber 15 between inner cylindrical groove 14 and interior disk seat 3 through rotatory outer disk seat 4 that moves up.

The outer valve seat 4 is connected with a flange 16 at the outer end of the outer cylindrical groove 13 through a bolt, the inner valve seat 3 is positioned on the inner side of the flange 16 and is in threaded fit, the stability of the action of the outer valve seat 4 is improved, the outer valve seat 4 is further provided with a drainage port 19 communicated with the inner cylindrical groove 14, the drainage port 19 is provided with a gate valve 20 for sealing, and after the inclined pressing is finished, the contents of the negative pressure cavity 15 can be discharged through the drainage port 19.

The motorized device consists of a motor 22 and a transmission assembly 23, wherein the transmission assembly 23 is used for the transmission connection of the motor 22 and the outer valve seat 4, and the motor 22 can control the action of the outer valve seat 4.

Based on the valve body structure of the

above embodiment

1 or 2, the valve body 5 is provided with the valve core 2 as shown in fig. 4, the valve port 1 is closed by the force of the spring 24, the valve port 1 is opened by the change of the pressure difference, and the principle of pressure relief is described in the following:

normally, the closed pipeline works normally, the valve port 1 is closed by the valve core 2, the piston 8 closes the pressure relief hole 10, the outer valve seat 4 is required to be rotated upwards in advance, a low-vacuum negative pressure cavity 15 is formed between the inner cylindrical groove 14 and the inner valve seat 3, the outer valve seat 4 and the inner valve seat 3 which are mutually in threaded fit can maintain the state of the negative pressure cavity 15, when the internal pressure of the pipeline is too large, as shown in fig. 4, the valve core 2 is jacked open, namely the valve port 1 is opened, the first pressure relief is generated, namely the pipeline is discharged to the valve cavity 5, the pressure relief amount is small, if the internal pressure of the pipeline is not enough to be relieved, the internal pressure of the valve cavity 5 is also lifted, the piston 8 in the cavity of the piston 8 is jacked up, the disc spring 9 is compressed, the piston 8 moves upwards to the pressure relief hole 10 to be opened, namely the pressure relief hole 10 is communicated with the cavity of the piston 8, and the internal pressure of the pipeline is discharged to the negative pressure cavity 15 sequentially towards the cavity of the piston 8, the pressure relief hole 10 and the flow guide channel 17, the inner pressure of the pipeline is reduced sharply, the disc spring 9 returns to enable the piston 8 to close the pressure relief hole 10 again, the spring 24 returns to enable the valve core 2 to close the valve port 1 again to complete secondary pressure relief, after pressure relief is completed, if the content of the negative pressure cavity 15 is excessive, the drain port 19 is opened by operating the gate valve 20, the outer valve seat 4 is rotated downwards to discharge the content of the negative pressure cavity 15, then the drain port 19 is closed, and then the outer valve seat 4 is rotated upwards to form the low-vacuum negative pressure cavity 15 again.

It should be noted that, in the case of an overload internal pressure of a sealed pipeline, the pressure relief can be completed by discharging a certain volume of contents, and the pressure relief can be realized by manufacturing the negative pressure cavity 15, and in the case of a non-extreme load, the single manufactured negative pressure cavity 15 is sufficient to provide multiple automatic pressure relief operations.

It should be understood that the above examples 1 and 2 of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. There is no need or no way to give poor examples of all embodiments. And such obvious changes and modifications which are within the spirit of the utility model are deemed to be covered by the present invention.

Claims

1. The utility model provides a seal valve body structure of release, installs in sealed pipeline, installs case (2) in valve port (1) department of establishing, its characterized in that: the pressure relief valve comprises an inner valve seat (3) and an outer valve seat (4), a communicated valve cavity (5) and a piston (8) cavity are arranged in the inner valve seat (3), the valve cavity (5) is used for installing a valve core (2), a valve port (1) is positioned at the end part of the valve cavity (5), a limiting part (7) is fixedly arranged between the piston (8) cavity and the valve cavity (5), a piston (8) and a disc spring (9) are arranged in the piston (8) cavity, two ends of the piston (8) respectively abut against the disc spring (9) and the limiting part (7), the end wall of the piston (8) cavity abuts against the disc spring (9), a pressure relief hole (10) is arranged on the side surface of the inner valve seat (3), the inner end of the pressure relief hole (10) is blocked by the side surface of the piston (8), an external thread and an external ring groove (11) are respectively arranged above and below the pressure relief hole (10) of the inner valve seat (3), and a rubber ring (12) is fixedly hooped in the external ring groove (11), be equipped with glossy outer cylindrical groove (13) in outer disk seat (4) and have internal screw thread interior cylindrical groove (14), interior cylindrical groove (14) and interior disk seat (3) screw-thread fit, outer cylindrical groove (13) by rubber ring circle (12) top is by sealed, moves up outer disk seat (4) through the rotation and can form low vacuum negative pressure chamber (15) between inner cylindrical groove (14) and interior disk seat (3).

2. A closed pressure relief valve body structure as claimed in claim 1, wherein: the outer valve seat (4) is connected with a flange plate (16) at the outer end of the outer cylindrical groove (13) through bolts, and the inner valve seat (3) is located on the inner side of the flange plate (16) and is in threaded fit.

3. A closed pressure relief valve body structure as claimed in claim 1, wherein: the outer valve seat (4) is further provided with a flow guide channel (17), one end of the flow guide channel (17) is communicated with the pressure relief hole (10), and the other end of the flow guide channel is communicated with the upper end face of the outer valve seat (4).

4. A closed pressure relief valve body structure as claimed in claim 1, wherein: and an asbestos packing (18) is fixedly covered on the side surface of the piston (8).

5. A closed pressure relief valve body structure as claimed in claim 1, wherein: the outer valve seat (4) is further provided with a drainage port (19) communicated with the inner cylindrical groove (14), and the drainage port (19) is provided with a gate valve (20) for sealing.

6. A closed pressure relief valve body structure as claimed in claim 1, wherein: the valve further comprises a hand wheel (21), and the hand wheel (21) is coaxially fixed with the outer valve seat (4).

7. A closed pressure relief valve body structure as claimed in claim 1, wherein: the valve seat further comprises a motorized device, the motorized device consists of a motor (22) and a transmission assembly (23), and the transmission assembly (23) is used for the transmission connection of the motor (22) and the outer valve seat (4).