CN213808889U

CN213808889U - High-frequency cut-off valve

Info

Publication number: CN213808889U
Application number: CN202022975132.XU
Authority: CN
Inventors: 左群; 文建均
Original assignee: Chongqing Jiakaijie Instrumentation Co ltd
Current assignee: Chongqing Jiakaijie Instrumentation Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-27
Anticipated expiration: 2030-12-08

Abstract

The utility model provides a high frequency trip valve, including tee bend valve body, valve rod, case and power component, the case sets up the valve rod lower extreme, power component sets up the last passageway opening part of tee bend valve body, power component does the valve rod provides the power of up-and-down motion, the case is used as the left side passageway and the switch that the right passageway of tee bend valve body communicates each other or cuts off, power component with from the bottom up has set gradually first seal structure and second between the valve rod and has said seal structure, first seal structure includes first general stopper circle, beryllium bronze ring, the general stopper circle of second and the first dust ring that from the bottom up set gradually, second says that the seal structure includes second dust ring, the general stopper circle of third and the last seal pressure plate that from the bottom up set gradually. The utility model discloses a synthesize and utilize multiple seal structure, improved the life-span of this valve greatly.

Description

High-frequency cut-off valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to high frequency trip valve.

Background

As shown in figure 1, the three-way valve body 1 is provided with a left channel, a right channel and an upper channel, the upper channel is provided with a power assembly, the power assembly drives a valve rod 3 to move up and down, the end part of the valve rod 3 is provided with a valve core 2, and the valve core 2 is arranged at the joint of the left channel and the right channel. The valve rod 3 drives the valve core 2 to move upwards, and the left channel is communicated with the right channel; when the valve core 2 moves downwards, the left channel and the right channel are cut off, so that the power assembly can cut off the left channel and the right channel at high frequency under the control of the control element.

However, since the valve rod 3 moves up and down with high frequency, after a period of operation, it is found that the abrasion of the sealing device between the valve rod 3 and the stationary part at the upper part of the channel of the three-way valve body 1 is large, resulting in a large amount of leakage of the medium in the right channel from the sealing device, so that the service life of the existing valve is low. Therefore, in order to improve the service life of the valve, it is necessary to improve the sealing structure and improve the service life of the valve.

SUMMERY OF THE UTILITY MODEL

The problem that the sealing device between the static part on valve rod and tee bend valve body upper portion to the valve rod that prior art exists the great a large amount of seepage of medium that leads to of channel wearing and tearing, the utility model provides a high frequency trip valve with new seal structure.

According to the utility model discloses an embodiment, high frequency trip valve, including tee bend valve body, valve rod, case and power component, the case sets up the valve rod lower extreme, power component sets up the last passageway opening part of tee bend valve body, power component does the valve rod provides the power of up-and-down motion, the case is used as the left side passageway and the right side passageway of tee bend valve body communicate each other or the switch that cuts off, power component with from the bottom up has set gradually first seal structure and second between the valve rod and has said seal structure, first seal structure includes first general stopper circle, beryllium bronze ring, the general stopper circle of second and the first dust ring that from the bottom up set gradually, second says that seal structure includes second dust ring, the general stopper circle of third and the last seal pressure plate that from the bottom up set gradually.

The beneficial effect that above technical scheme produced is:

through setting up the first seal structure including first general stopper ring, beryllium bronze ring, the general stopper ring of second and first dust ring to and including the second seal structure of the general stopper ring of second, third and last seal plate, synthesize and use multiple seal structure, improved the life-span of this valve greatly. Through tests conducted at present, the valve rod moves 150 thousands of times without leaking bubbles.

The utility model discloses still include following further technical scheme:

furthermore, an O-shaped sealing ring is arranged between the beryllium bronze ring and the valve rod.

Further, still be provided with first gasket between general stopper ring of second and the first dust ring, still be provided with the second gasket between general stopper ring of third and the second dust ring.

Preferably, the opening of the first stopper ring faces downwards, and the opening of the second stopper ring faces upwards.

Preferably, the opening of the third stopper ring faces upward.

Generally, the power assembly comprises a lower end cover, a support, an upper plate and a cylinder, wherein the lower end cover is arranged at an opening of an upper channel of the three-way valve body, the support is arranged on the lower end cover, the upper plate is arranged at the upper end of the support, and the cylinder is supported and arranged on the upper plate.

Typically, the first seal is disposed between the lower end cap and the valve stem, and the second seal is disposed between the upper plate and the valve stem.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

Fig. 1 is a front view of a high-frequency cutoff valve provided in an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

fig. 3 is an enlarged schematic view of B in fig. 1.

Reference numerals:

1. a three-way valve body; 2. a valve core; 3. a valve stem; 4. a lower end cover; 5. a support; 6. an upper plate; 7. a cylinder; 8. a first stopper ring; 9. an O-shaped sealing ring; 10. a beryllium bronze ring; 11. a second plunger ring; 12. a first gasket; 13. a first dust ring; 14. a second dust ring; 15. a second gasket; 16. a third universal plug ring; 17. and an upper sealing pressure plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Like figure 1, high frequency trip valve, including tee bend valve body 1, valve rod 3, case 2 and power component, tee bend valve body 1 is provided with passageway, left side passageway and right side passageway, three passageway intercommunication. The power component is arranged at the opening of the upper channel of the three-way valve body 1, the upper end of the valve rod 3 is connected with the power component, the power component provides power for the valve rod 3 to move up and down, the valve core 2 is arranged at the lower end of the valve rod 3, and the valve core 2 is used as a switch for mutually communicating or cutting off the left channel and the right channel of the three-way valve body 1. When the valve core 2 moves downwards to block the throat between the left channel and the right channel, the left channel and the right channel are disconnected, and a medium cannot flow into the right channel from the left channel; when the spool 2 moves upward away from the throat between the left and right passages, the left and right passages communicate and the medium can flow from the left passage into the right passage.

As shown in fig. 1, the power assembly comprises a lower end cover 4, a support 5, an upper plate 6 and a cylinder 7, wherein the lower end cover 4 is fixed at an opening of an upper channel of the three-way valve body 1 through a bolt, the support 5 is fixedly arranged on the lower end cover 4, the upper end of the support 5 is connected with the upper plate 6, and the cylinder 7 is supported and arranged on the upper plate 6. A first sealing structure and a second sealing structure are sequentially arranged between the power assembly and the valve rod 3 from bottom to top. The first sealing structure is arranged between the lower end cover 4 and the valve rod 3, and the second sealing structure is arranged between the upper plate 6 and the valve rod 3.

As shown in fig. 2, the first sealing structure includes a first plunger ring 8, a beryllium bronze ring 10, a second plunger ring 11, a first gasket 12 and a first dust ring 13, which are arranged in sequence from bottom to top, and an O-ring 9 is arranged between the beryllium bronze ring 10 and the valve rod 3.

As shown in fig. 3, the second sealing structure includes a second dust ring 14, a second gasket 15, a third plunger ring 16 and an upper sealing pressure plate 17, which are arranged in sequence from bottom to top.

Preferably, the opening of the first jamming ring 8 is downward, the opening of the second jamming ring 11 is upward, and the opening of the third jamming ring 16 is upward. According to experimental data, the combined mode of the three universal piston rings has better sealing effect and longer service life.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. High frequency trip valve, including tee bend valve body (1), valve rod (3), case (2) and power component, case (2) set up valve rod (3) lower extreme, power component sets up the last passageway opening part of tee bend valve body (1), power component does valve rod (3) provide the power of up-and-down motion, case (2) are used as the switch that left side passageway and the right side passageway of tee bend valve body (1) communicate each other or cut off, its characterized in that:

power component with from the bottom up has set gradually first seal structure and second way seal structure between valve rod (3), first seal structure includes first general stopper circle (8), beryllium bronze ring (10), the general stopper circle of second (11) and first dust ring (13) that from the bottom up set gradually, second way seal structure includes second dust ring (14), the general stopper circle of third (16) and top seal clamp plate (17) that from the bottom up set gradually.

2. The high-frequency cut-off valve according to claim 1, wherein an O-shaped sealing ring (9) is further arranged between the beryllium bronze ring (10) and the valve rod (3).

3. The high frequency trip valve according to claim 2, characterized in that a first gasket (12) is further provided between the second wiper ring (11) and the first wiper ring (13), and a second gasket (15) is further provided between the third wiper ring (16) and the second wiper ring (14).

4. The high frequency cutoff valve according to claim 1, characterized in that the opening of the first flooding ring (8) is downward and the opening of the second flooding ring (11) is upward.

5. The high frequency cutoff valve according to claim 4, characterized in that the third flooding gasket (16) opens upward.

6. The high-frequency cut-off valve according to claim 1, wherein the power assembly comprises a lower end cover (4), a support (5), an upper plate (6) and a cylinder (7), the lower end cover (4) is arranged at an upper channel opening of the three-way valve body (1), the support (5) is arranged on the lower end cover (4), the upper plate (6) is arranged at the upper end of the support (5), and the cylinder (7) is supported and arranged on the upper plate (6).

7. The high frequency cutoff valve according to claim 6, wherein the first sealing structure is provided between the lower end cap (4) and the valve stem (3), and the second sealing structure is provided between the upper plate (6) and the valve stem (3).