CN219493038U

CN219493038U - Valve port pad sealing structure of gas flow regulating valve

Info

Publication number: CN219493038U
Application number: CN202320025568.3U
Authority: CN
Inventors: 何文清; 兰建强; 彭小树; 段燕清; 卢新友; 代贤超; 贾源; 董翔
Original assignee: Leshan Chuantian Gas Equipment Co ltd
Current assignee: Leshan Chuantian Gas Equipment Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-08-08
Anticipated expiration: 2033-01-06

Abstract

The utility model discloses a valve port gasket sealing structure of a gas flow regulating valve, which relates to the technical field of flow control of a natural gas pipe network and comprises a valve body, a valve seat, a valve port gasket, a cage-shaped sleeve and a valve port; the valve body is internally provided with a fluid flow channel, the fluid flow channel comprises an inlet section fluid flow channel and an outlet section fluid flow channel, the valve seat and the cage-shaped sleeve are fixedly arranged between the inlet section fluid flow channel and the outlet section fluid flow channel, and a fluid flow path is formed by gas fluid through the inlet section fluid flow channel, the cage-shaped sleeve and the outlet section fluid flow channel; the valve port pad is fixedly arranged on the valve seat, the valve port is slidably assembled in the cage-shaped sleeve, and a sealing surface of the valve port is provided with a plurality of non-smooth sealing bulges; when the valve port moves towards the valve seat, the non-smooth sealing bulge and the valve port pad are propped against each other to form a seal. The non-smooth sealing bulge strengthens the sealing effect of the valve port pad of the flow regulating valve, and greatly improves the safety of the flow regulating valve.

Description

Valve port pad sealing structure of gas flow regulating valve

Technical Field

The utility model relates to the technical field of natural gas pipe network flow control, in particular to a valve port gasket sealing structure of a gas flow regulating valve.

Background

The flow regulating valve generally consists of an executing mechanism and a valve body, and changes the fluid flow by power operation through receiving a control signal output by a regulating control unit. In natural gas network flow control, the flow regulating valve plays a very important role, and is one of the forms of the final control element widely used.

In many systems, the flow control valve is subject to more severe operating conditions, such as temperature, pressure, corrosion and contamination than other components, however, when it is controlling the gas flow, difficult challenges are faced, which must perform satisfactorily and with minimal maintenance, which places greater demands on the structure of the flow control valve.

In a flow regulating valve, the sealing performance of a valve port pad and a valve port is the most critical ring, and plays a critical role on the overall performance of the valve port pad and the valve port. However, because the flow regulating valve has severe working conditions, the valve port pad is generally made of rubber, and when the valve port and the valve port pad are opened in a small flow condition, impurities such as dust and the like in the air can scour the valve port pad at a certain flow rate to damage the valve port pad. When the valve port pad is washed out and damaged, the valve port pad is easy to cause sealing to be not tight and pressure is in series under the closing state. Under such conditions, the service life of the traditional valve port gasket sealing structure is greatly reduced, and the service performance of the regulating valve is seriously affected due to the fact that the valve port gasket is not tightly sealed and the pressure is in series, so that serious potential safety hazards exist.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a valve port gasket sealing structure of a gas flow regulating valve, so as to solve the problems that the use performance of the regulating valve is seriously affected by the pressure of the valve port gasket due to the fact that the valve port gasket is not tightly sealed, serious potential safety hazards exist, the service life is greatly reduced and the like. According to the utility model, the sealing surface of the valve port is provided with a plurality of non-smooth sealing bulges, so that the sealing effect of the valve port gasket of the flow regulating valve is enhanced compared with that of the conventional valve port gasket, and the safety of the flow regulating valve is greatly improved; meanwhile, the service life and the maintenance period of the equipment are longer, and the purpose of eliminating potential safety hazards is achieved.

In order to achieve the above purpose, the present utility model adopts the technical scheme that:

a valve port pad sealing structure of a gas flow regulating valve comprises a valve body, a valve seat, a valve port pad, a cage-shaped sleeve and a valve port;

the valve body is internally provided with a fluid flow channel, the fluid flow channel comprises an inlet section fluid flow channel and an outlet section fluid flow channel, the valve seat and the cage-shaped sleeve are fixedly arranged between the inlet section fluid flow channel and the outlet section fluid flow channel, and a fluid flow path is formed by gas fluid through the inlet section fluid flow channel, the cage-shaped sleeve and the outlet section fluid flow channel;

the valve port pad is fixedly arranged on the valve seat, the valve port is slidably assembled in the cage-shaped sleeve, and a sealing surface of the valve port is provided with a plurality of non-smooth sealing bulges; when the valve port moves towards the valve seat, the non-smooth sealing bulge and the valve port pad are propped against each other to form a seal, and meanwhile, the valve port seals the cage-shaped sleeve to close the fluid flow path.

Further, the valve port is provided with a pressure balance hole which is communicated with the internal cavity and the fluid flow channel of the inlet section.

Further, the non-smooth sealing protrusion is a V-shaped groove.

Further, the valve seat is abutted against the cage-shaped sleeve, the valve port pad is fixedly arranged between the valve seat and the cage-shaped sleeve and extends towards the inner end of the cage-shaped sleeve, and the non-smooth sealing protrusion is abutted against the extending section of the valve port pad to form sealing.

Further, the fluid flow channel is horizontally arranged in the valve body and comprises a flow cavity with a large inner diameter and a small inner diameter, the cage-shaped sleeve is horizontally arranged in the large flow cavity, the outlet section fluid flow channel is formed between the outer wall of the cage-shaped sleeve and the inner wall of the large flow cavity, and the inlet section fluid flow channel is formed by the small flow cavity.

Further, the cage sleeve is provided with a plurality of through holes for communicating the inside and the outside of the cage sleeve.

Further, the valve port pad is made of rubber.

The utility model has the beneficial effects that:

the valve port pad sealing structure of the gas flow regulating valve provided by the utility model has the advantages that the sealing surface of the valve port is provided with the plurality of non-smooth sealing bulges, the contact area between the valve port and the valve port pad is reduced by the non-smooth sealing bulges, namely, the sealing specific pressure of the valve port and the valve port pad is improved, the valve port and the valve port pad are tightly sealed under the original same sealing force, and the valve port is reliably sealed when the valve port pad is closed even under the condition of slight damage, so that the downstream safe gas consumption is ensured.

According to the valve port gasket sealing structure of the gas flow regulating valve, the sealing surface of the valve port is provided with the plurality of non-smooth sealing bulges, so that the valve port gasket sealing effect of the flow regulating valve is enhanced compared with that of a conventional valve port gasket sealing structure, and the safety of the flow regulating valve is greatly improved; meanwhile, the service life and the maintenance period of the equipment are longer, and the purpose of eliminating potential safety hazards is achieved.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present utility model;

reference numerals:

1. a valve body; 2. a valve seat; 3. a valve port pad; 4. a cage sleeve; 5. a valve port; 6. an inducer fluid flow path; 7. an outlet section fluid flow passage; 8. a non-smooth sealing protrusion; 9. and a pressure balance hole.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model.

Example 1

The valve port pad sealing structure of the gas flow regulating valve, as shown in figures 1 and 2, comprises a valve body 1, a valve seat 2, a valve port pad 3, a cage-shaped sleeve 4 and a valve port 5;

the valve body 1 is internally provided with a fluid flow channel, the fluid flow channel comprises an inlet section fluid flow channel 6 and an outlet section fluid flow channel 7, the valve seat 2 and the cage type sleeve 4 are fixedly arranged between the inlet section fluid flow channel 6 and the outlet section fluid flow channel 7, and a fluid flow path is formed by fuel gas fluid through the inlet section fluid flow channel 6, the cage type sleeve 4 and the outlet section fluid flow channel 7;

the valve port pad 3 is fixedly arranged on the valve seat 2, the valve port 5 is slidably assembled in the cage-shaped sleeve 4, and a sealing surface of the valve port 5 is provided with a plurality of non-smooth sealing bulges 8; when the valve port 5 moves towards the valve seat 2, the non-smooth sealing bulge 8 and the valve port pad 3 are propped against each other to form a seal, and meanwhile, the valve port 5 closes the cage-shaped sleeve 4 to close a fluid flow path.

As shown in fig. 1, the gas fluid enters the inlet section fluid flow channel 6 from the left side, and when the valve is in an open state, the gas flows through the channels at the valve port 5 and the valve port pad 3, flows into the outlet section fluid flow channel 7 through the cage 4, and is conveyed downstream. If the valve port 5 moves rightwards, the opening is larger, the valve flow is increased, and otherwise, the valve flow is reduced; when the valve is in a closed state, the valve port 5 is in close contact with the valve port pad 3, and upstream air flow of the valve is blocked.

In the prior art, when the flow regulating valve regulates the flow, the flow can be large or small, and when the valve port 5 and the valve port pad 3 are small in opening under the working condition of small flow, if dust and other impurities are contained in air, the valve port pad 3 can be flushed at a certain flow velocity, the valve port pad 3 is damaged, and the sealing is not tight under the closing state, so that the pressure is in series.

The sealing part of the conventional valve port 5 and the valve port gasket 3 is of a planar smooth structure, the embodiment adopts an improved valve port sealing surface structure for preventing the condition of poor sealing, a plurality of non-smooth sealing bulges 8 are processed on the planar sealing surface, the contact area of the valve port 5 and the valve port gasket 3 is reduced, namely the sealing specific pressure of the sealing part is improved, the sealing of the valve port 5 and the valve port gasket 3 is tighter under the original same sealing force, and the sealing reliability of the valve during closing can be ensured even under the condition that the valve port gasket 3 is slightly damaged, so that the downstream safe gas consumption is ensured.

Example 2

The present embodiment is further described on the basis of embodiment 1, and as shown in fig. 1, a pressure balance hole 9 is formed in the valve port 5 to communicate the internal cavity thereof with the inlet fluid flow channel 6. The pressure balance hole 9 enables the pressures at the left end and the right end of the valve port 5 to be consistent and are both inlet pressures, so that the valve port 5 can slide only by small acting force in the adjusting process.

As shown in fig. 2, the non-smooth sealing protrusion 8 is a V-shaped groove, and the V-shaped groove reduces the contact area between the valve port 5 and the valve port pad 3, namely improves the sealing specific pressure at the contact area, and the valve port 5 and the valve port pad 3 are sealed more tightly under the action of the same sealing force.

As shown in fig. 1, this embodiment provides a specific form of valve seat 2, valve port pad 3 and cage 4 structure: the valve seat 2 is propped against the cage-shaped sleeve 4, the valve port pad 3 is fixedly arranged between the valve seat 2 and the cage-shaped sleeve 4 and extends towards the inner end of the cage-shaped sleeve 4, and the non-smooth sealing bulge 8 is propped against the extending section of the valve port pad 3 to form a seal.

As shown in fig. 1, the fluid flow channel is horizontally arranged in the valve body 1, and comprises a flow cavity with a large inner diameter and a small inner diameter, the cage-shaped sleeve 4 is horizontally arranged in the large flow cavity, an outlet section fluid flow channel 7 is formed between the outer wall of the cage-shaped sleeve 4 and the inner wall of the large flow cavity, and the small flow cavity forms an inlet section fluid flow channel 6. By providing a large and small flow cavity in the above form, the installation of the valve seat 2, the valve port pad 3, the cage 4 and the valve port 5, and the formation of a fluid flow channel and a fluid flow path are facilitated.

As shown in fig. 1, the cage-shaped sleeve 4 is provided with a plurality of through holes for communicating the inside and the outside of the cage-shaped sleeve for the circulation of gas fluid. The valve port pad 3 is made of rubber.

For a better understanding of the present utility model, the following is a complete description of the principles of the utility model:

when the valve is in an open state, gas flows through the channels at the valve port 5 and the valve port pad 3, flows into the outlet section fluid flow channel 7 through the cage 4, and is conveyed downstream.

When the valve needs to be closed, the valve port 5 moves towards the valve seat 2, the non-smooth sealing bulge 8 and the valve port pad 3 are propped against to form a seal, and meanwhile, the valve port 5 closes the cage-shaped sleeve 4 to close a fluid flow path. The non-smooth sealing bulge 8 (V-shaped groove) reduces the contact area of the valve port 5 and the valve port pad 3, namely, the sealing specific pressure at the contact area is improved, and the valve port 5 and the valve port pad 3 are tightly sealed under the original same sealing force.

In the use process of the valve, the pressure balance hole 9 enables the pressures at the left end and the right end of the valve port 5 to be consistent and are both inlet pressures, so that the valve port 5 can slide only by small acting force in the adjustment process.

While the embodiments of the present utility model have been described in detail, the present utility model is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims

1. The valve port gasket sealing structure of the gas flow regulating valve is characterized by comprising a valve body (1), a valve seat (2), a valve port gasket (3), a cage-shaped sleeve (4) and a valve port (5);

the gas valve is characterized in that a fluid flow channel is arranged in the valve body (1), the fluid flow channel comprises an inlet section fluid flow channel (6) and an outlet section fluid flow channel (7), the valve seat (2) and the cage-shaped sleeve (4) are fixedly arranged between the inlet section fluid flow channel (6) and the outlet section fluid flow channel (7), and a fluid flow path is formed by gas fluid through the inlet section fluid flow channel (6), the cage-shaped sleeve (4) and the outlet section fluid flow channel (7);

the valve port gasket (3) is fixedly arranged on the valve seat (2), the valve port (5) is slidably assembled in the cage-shaped sleeve (4), and a plurality of non-smooth sealing bulges (8) are arranged on the sealing surface of the valve port (5); when the valve port (5) moves towards the valve seat (2), the non-smooth sealing bulge (8) and the valve port pad (3) are propped against to form a seal, and meanwhile, the valve port (5) seals the cage sleeve (4) to close the fluid flow path.

2. The valve port gasket seal of claim 1, wherein the valve port (5) is provided with a pressure balancing hole (9) communicating the internal cavity thereof with the inlet section fluid flow passage (6).

3. The valve port gasket seal of claim 1, wherein the non-smooth sealing protrusion (8) is a V-groove.

4. The valve port gasket seal of claim 1 wherein the valve seat (2) abuts against the cage (4), the valve port gasket (3) being fixedly mounted between the valve seat (2) and the cage (4) and extending toward the inner end of the cage (4), the non-smooth sealing protrusion (8) abutting against the extension of the valve port gasket (3) to form a seal.

5. The valve port gasket seal of claim 1, wherein the fluid flow channel is horizontally opened in the valve body (1), and comprises a flow cavity with a large inner diameter and a small inner diameter, the cage-shaped sleeve (4) is horizontally installed in the large flow cavity, the outlet section fluid flow channel (7) is formed between the outer wall of the cage-shaped sleeve (4) and the inner wall of the large flow cavity, and the inlet section fluid flow channel (6) is formed by the small flow cavity.

6. The valve port gasket seal of claim 1 wherein said cage (4) has a plurality of through holes communicating the inside and outside thereof.

7. The valve port gasket seal of claim 1, wherein the valve port gasket (3) is a rubber material.