CN219159534U

CN219159534U - High side valve prevents interior hourglass structure

Info

Publication number: CN219159534U
Application number: CN202222851891.4U
Authority: CN
Inventors: 陈翔; 贾刚; 曹茂昌
Original assignee: Datang Binchang Power Generation Co ltd; Datang Shaanxi Power Generation Co Ltd
Current assignee: Datang Binchang Power Generation Co ltd; Datang Shaanxi Power Generation Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-06-09
Anticipated expiration: 2032-10-28

Abstract

The utility model provides an inner leakage preventing structure of a high side valve, which belongs to the technical field of valves and comprises a valve seat and a corner body, wherein the valve seat is embedded in the inner part of the corner body, and the inner leakage preventing structure is arranged in the inner part of the valve seat, wherein: the inner leakage prevention structure comprises a valve clack, a bolt, a nut and a valve rod, wherein the valve clack is embedded in the inner wall of the valve seat, the bolt is fixedly arranged at one end of the valve rod, the nut is in threaded connection with the outer wall of the bolt, and one end of the valve rod penetrates through the inner wall of the valve seat. Through preventing interior hourglass structure, can avoid after the maintenance to open in succession and stop 2 times machine back valves and begin interior hourglass, high side temperature reduction water regulating valve interior hourglass after, the maximum temperature reaches 385 ℃, seriously influences the safe operation of unit, seriously influences unit steam consumption efficiency, and high side temperature reduction water regulating valve interior hourglass avoids producing a large amount of incident.

Description

High side valve prevents interior hourglass structure

Technical Field

The utility model belongs to the technical field of valves, and particularly relates to an internal leakage preventing structure of a high side valve.

Background

The valve (valve) is a control component in the fluid conveying system and has the functions of stopping, adjusting, guiding, preventing countercurrent, stabilizing pressure, diverting or overflow pressure relief and the like.

When the leakage of the high side valve is large, a large amount of steam does not do work but directly enters the reheat steam system, so that a large amount of energy is lost, and the economy of the unit is reduced. When the leakage amount in the high-side temperature-reducing water regulating valve is large, the exhaust temperature of the high-pressure cylinder is reduced, the coal consumption is increased, and meanwhile, the water inlet risk of the steam turbine during warming up is increased; and the water supplementing amount of the condensed water is increased, the unit cannot reliably run, the high side valve joint surface is repaired by commission each time of overhaul, the repairing process comprises surfacing, turning, nitriding and furnace returning, and the internal leakage phenomenon occurs again when the low side valve is continuously started and stopped for not more than 2 times. The high-side temperature-reducing water electric valve and the regulating valve are subjected to external commission repair treatment every time when being subjected to small repair, the use effect is relatively poor after the treatment, and the internal leakage phenomenon is caused again after the starting and stopping of the valve for not more than 2 times.

Disclosure of Invention

The utility model aims to provide a high side valve inner leakage prevention structure, which aims to solve the problems of the background technology.

A high side valve inner leakage preventing structure, which comprises,

the valve seat and the corner body are embedded in the corner body;

prevent interior hourglass structure locates the inside department of disk seat, wherein: the anti-internal leakage structure comprises a valve clack, a bolt, a nut and a valve rod, wherein the valve clack is embedded in the inner wall of the valve seat, the bolt is fixedly arranged at one end of the valve rod, the nut is in threaded connection with the outer wall of the bolt, and one end of the valve rod penetrates through the inner wall of the valve seat.

Further, the inner wall of the valve seat is provided with a limiting screw in a penetrating mode, and one end of the limiting screw is sleeved with a backstop gasket.

Further, graphite gaskets are sleeved on the outer wall of the bottom end of the limiting screw.

Furthermore, an elastic filler chamber is arranged on the inner wall of the valve seat.

Further, one end outer wall of the valve seat is sleeved with a graphite ring, and the graphite ring is embedded in the corner body.

Further, a packing washer is embedded in the top end of the valve seat, and valve rod packing is embedded in the top end of the valve seat.

Compared with the prior art, the utility model has the beneficial effects that:

in this scheme, through preventing interior hourglass structure, can avoid after the maintenance to open in succession and stop 2 times machine back valve begin interior hourglass, high side temperature reduction water regulating valve interior hourglass after, the maximum temperature reaches 385 ℃, seriously influences the safe operation of unit, seriously influences unit steam consumption efficiency, leaks in the high side temperature reduction water regulating valve, avoids producing a large amount of incident.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view in partial cross-section of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

fig. 3 is a perspective view of the present utility model.

In the figure: 1. a valve seat; 2. a graphite gasket; 3. a limit screw; 4. a valve flap; 5. a plug pin; 6. a nut; 7. a valve stem; 8. a backstop pad; 9. a spring packing chamber; 10. a graphite ring; 11. a packing washer; 12. valve rod filler; 101. and (5) a corner body.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the mechanical connection and the electrical connection can be adopted; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-3, the technical scheme provided by the present embodiment is as follows:

a high side valve inner leakage preventing structure, which comprises,

the valve seat 1 and the corner body 101, the valve seat 1 is embedded in the corner body 101;

prevent interior hourglass structure locates the inside department of disk seat 1, wherein: the inner leakage prevention structure comprises a valve clack 4, a bolt 5, a nut 6 and a valve rod 7, wherein the valve clack 4 is embedded in the inner wall of the valve seat 1, the bolt 5 is fixedly arranged at one end of the valve rod 7, the nut 6 is in threaded connection with the outer wall of the bolt 5, and one end of the valve rod 7 penetrates through the inner wall of the valve seat 1.

In the specific embodiment of the utility model, through the internal leakage prevention structure, the internal leakage of the valve after the valve is continuously started and stopped for 2 times after maintenance can be avoided, the highest temperature reaches 385 ℃ after the internal leakage of the high-side temperature-reducing water regulating valve, the safe operation of a unit is seriously influenced, the steam consumption efficiency of the unit is seriously influenced, and a large number of safety accidents are avoided.

Specifically, the inner wall of the valve seat 1 is provided with a limiting screw 3 in a penetrating manner, and one end of the limiting screw 3 is sleeved with a retaining washer 8.

In the embodiment of the present utility model, by restricting the screw 3, the ease and stability of installation of the

valve seats

1 and 1 can be ensured.

Specifically, the bottom outer wall cover of restriction screw 3 is equipped with graphite gasket 2.

In the specific embodiment of the present utility model, the stable connection of the limiting screw 3 can be ensured by the graphite gasket 2.

Specifically, the inner wall of the valve seat 1 is provided with a spring packing chamber 9.

In the embodiment of the present utility model, by the spring packing chamber 9, a high precision movement of the valve stem 7 of the valve seat 1 can be ensured.

Specifically, a graphite ring 10 is sleeved on the outer wall of one end of the valve seat 1, and the graphite ring 10 is embedded in the corner 101.

In the embodiment of the present utility model, sealability can be ensured by the graphite ring 10.

Specifically, a packing washer 11 is embedded in the top end of the valve seat 1, and a valve rod packing 12 is embedded in the top end of the valve seat 1.

In the specific embodiment of the present utility model, the tightness of the valve stem 7 can be ensured by the packing washer 11 and the valve stem packing 12.

The working process of the high side valve inner leakage prevention structure provided by the utility model is as follows:

through preventing interior hourglass structure, can avoid after the maintenance to open in succession and stop 2 times machine back valves and begin interior hourglass, high side temperature reduction water regulating valve interior hourglass after, the maximum temperature reaches 385 ℃, seriously influences the safe operation of unit, seriously influences unit steam consumption efficiency, and high side temperature reduction water regulating valve interior hourglass avoids producing a large amount of incident, combines valve clack 4 and valve rod 7, can realize stable sealing, avoids because excessive wear, the interior hourglass phenomenon that leads to.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A high side valve internal leakage preventing structure is characterized by comprising,

the valve seat (1) and the corner body (101), wherein the valve seat (1) is embedded in the corner body (101);

prevent interior hourglass structure locates the inside department of disk seat (1), wherein: the anti-internal leakage structure comprises a valve clack (4), a bolt (5), a nut (6) and a valve rod (7), wherein the valve clack (4) is embedded in the inner wall of the valve seat (1), the bolt (5) is fixedly arranged at one end of the valve rod (7), the nut (6) is in threaded connection with the outer wall of the bolt (5), and one end of the valve rod (7) penetrates through the inner wall of the valve seat (1).

2. The high side valve inner leakage prevention structure according to claim 1, wherein the inner wall of the valve seat (1) is provided with a limiting screw (3) in a penetrating manner, and one end of the limiting screw (3) is sleeved with a backstop gasket (8).

3. The high side valve inner leakage preventing structure according to claim 2, wherein the graphite gasket (2) is sleeved on the outer wall of the bottom end of the limiting screw (3).

4. A high by-pass valve inner leakage prevention structure according to claim 3, characterized in that the inner wall of the valve seat (1) is provided with a spring packing chamber (9).

5. The high side valve inner leakage preventing structure according to claim 4, wherein a graphite ring (10) is sleeved on the outer wall of one end of the valve seat (1), and the graphite ring (10) is embedded in the corner body (101).

6. The high side valve inner leakage preventing structure according to claim 5, wherein a packing washer (11) is embedded in the top end of the valve seat (1), and a valve rod packing (12) is embedded in the top end of the valve seat (1).