CN219452986U - Adjusting device for adjusting screw of safety valve - Google Patents

Abstract

The utility model discloses a safety valve adjusting screw adjusting device which comprises a columnar main body, wherein a connecting part is arranged at the first axial end of the columnar main body, a boss part is arranged at the second axial end of the columnar main body, and the cross section of the boss part is inscribed in a regular pentagon. The adjusting screw adjusting device for the safety valve can be suitable for an adjusting screw of a REGO safety valve, can adjust the adjusting screw, enables the safety valve to normally operate, and can effectively reduce the operation cost of a nuclear power plant.

Description

Adjusting device for adjusting screw of safety valve

Technical Field

The utility model relates to the technical field of nuclear power safety valve overhaul, in particular to a safety valve adjusting screw adjusting device.

Background

The safety valve is used as a valve for maintaining the pressure of the pipeline and protecting the pipeline when the pipeline is overpressured, and can be subjected to pressure setting test and tightness test in a certain time period according to outline requirements due to the important function of the safety valve in the system, and if the test is unqualified, the safety valve can be disassembled for maintenance.

As shown in fig. 1 and 2, the SGZ system safety valve of the Yangjiang nuclear power plant includes a reg safety valve, an adjusting screw 10 of the reg safety valve is made of copper material, an inner ring part 11 of the adjusting screw 10 is of a specific shape, no proper adjusting tool is provided, and when the safety valve has a constant value deviation, the safety valve cannot be adjusted, so that the safety valve is scrapped, and a new valve must be purchased to ensure the field use.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a safety valve adjusting screw adjusting device.

The technical scheme adopted for solving the technical problems is as follows: the adjusting device comprises a columnar main body, wherein a connecting part is arranged at the first axial end of the columnar main body, a boss part is arranged at the second axial end of the columnar main body, and the cross section of the boss part is inscribed with a regular pentagon.

In some embodiments, the boss portion has a thickness radius of 5.6mm;

the height of the boss part is 5mm.

In some embodiments, the connection is an outer hex connection.

In some embodiments, the dimension of the line between the opposing sidewalls of the connection is 14mm.

In some embodiments, the adjacent sidewalls of the connection form an angle of 108 °.

In some embodiments, the height of the connection is 10mm.

In some embodiments, the relief valve adjustment screw adjustment device is provided with a through slot that passes through the connecting portion to the boss portion.

In some embodiments, the through slot has an inner diameter of 3mm.

In some embodiments, the columnar body is circular in cross-section with a radius of 8.5mm.

In some embodiments, the columnar body has a height of 15mm.

The implementation of the utility model has the following beneficial effects: the adjusting screw adjusting device for the safety valve can be suitable for an adjusting screw of a REGO safety valve, can adjust the adjusting screw, enables the safety valve to normally operate, and can effectively reduce the operation cost of a nuclear power plant.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present utility model and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:

FIG. 1 is a schematic structural view of a type of safety valve;

FIG. 2 is a simplified schematic illustration of an adjustment screw of the safety valve shown in FIG. 1;

FIG. 3 is a schematic illustration of the structure of a relief valve adjustment screw adjustment device in some embodiments of the present utility model;

FIG. 4 is a bottom view of a relief valve adjustment screw adjustment device in some embodiments of the present utility model;

fig. 5 and 6 are schematic illustrations of the specifications of the relief valve adjustment screw adjustment device in some embodiments of the present utility model.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

Referring to fig. 3 to 6, the present utility model shows a safety valve adjusting screw adjusting device, which includes a cylindrical main body 21, a connecting portion 22 is disposed at a first axial end of the cylindrical main body 21, a boss portion 23 is disposed at a second axial end of the cylindrical main body 21, and a cross-sectional shape (or a projection shape) of the boss portion 23 is inscribed in a regular pentagon. Preferably, the thickness radius of the boss portion 23 is 5.6mm, and the height of the boss portion 23 is 5mm.

The columnar body 21 is substantially cylindrical, and the columnar body 21 has a circular cross section and a radius of 8.5mm.

Preferably, the height of the columnar body 21 is 15mm, however, in other embodiments, the height of the columnar body 21 may be 16mm, 17mm, 18mm, 19mm or 20mm, and the height may be appropriately adjusted according to practical needs, which is not particularly limited herein.

In some embodiments, the connection 22 is an outer hex connection. Preferably, the connecting portion 22 has a dimension of 14mm relative to the line between the two side walls.

In some embodiments, the adjacent sidewalls of the connecting portion 22 form an angle of 108 °.

In some embodiments, the height of the connection 22 is 10mm.

In some embodiments, the relief valve adjusting screw adjusting device is provided with a through groove 211 penetrating the connecting portion 22 to the boss portion 23, so that the valve stem of the relief valve can be inserted into the through groove 211 when the relief valve adjusting screw adjusting device is used.

In some embodiments, the inner diameter of the through slot 211 is 3mm.

In some embodiments, the relief valve adjustment screw adjustment device is of unitary construction, preferably made of a metallic material such as stainless steel.

The SGZ system safety valve can carry out periodic check work every year, and disassembly maintenance is needed when the check is unqualified. When the special tool is lacking, part of the valve is difficult to disassemble or can not be disassembled, maintenance work is difficult to carry out, the cause of defects can not be ascertained, and the defects of the same type can be generated again after the whole valve spare part is replaced. Part of defects can be eliminated only by adjusting the adjusting screw, but the adjusting screw is lack of tools and inconvenient to adjust, and in the adjusting process, the adjusting screw is easy to damage, scraps enter the valve to damage the sealing surface, and only the whole valve can be replaced, so that the maintenance cost is greatly improved.

The use of the adjusting screw adjusting device of the safety valve solves the problem of difficult disassembly of the valve, and realizes the breakthrough of the special disassembly tool of the valve from zero to some. The adjusting device of the adjusting screw of the safety valve is provided with a boss part 23 matched with the groove structure on the adjusting screw, so that the setting value of the spring can be quickly and conveniently adjusted. Meanwhile, the use of the safety valve adjusting screw adjusting device also reduces the requirements on strength and skill of overhaul workers, avoids the damage to the adjusting screw due to the lack of qualified tools, and reduces the cost loss.

It can be appreciated that the safety valve adjusting screw adjusting device can be applied to an adjusting screw of a REGO safety valve, and can adjust the adjusting screw, so that the safety valve can normally operate, and the operating cost of a nuclear power plant can be effectively reduced.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The utility model provides a relief valve adjusting screw adjusting device, its characterized in that includes column main part (21), the axial first end of column main part (21) is equipped with connecting portion (22), the axial second end of column main part (21) is equipped with boss portion (23), the cross sectional shape of boss portion (23) is inscribed regular pentagon.

2. A relief valve adjustment screw adjustment device according to claim 1, characterized in that the thickness radius of the boss portion (23) is 5.6mm;

the height of the boss part (23) is 5mm.

3. The safety valve adjusting screw adjusting device according to claim 1, wherein the connecting portion (22) is an outer hexagonal joint.

4. A safety valve adjusting screw adjusting device according to claim 3, characterized in that the dimension of the line between the opposite side walls of the connecting portion (22) is 14mm.

5. The relief valve adjustment screw adjustment device according to claim 4, characterized in that the adjacent side walls of the connection portion (22) form an angle of 108 °.

6. The relief valve adjustment screw adjustment device according to claim 4, characterized in that the height of the connection portion (22) is 10mm.

7. The relief valve adjusting screw adjusting device according to any one of claims 1 to 6, characterized in that the relief valve adjusting screw adjusting device is provided with a through groove (211) penetrating the connecting portion (22) to the boss portion (23).

8. The safety valve adjusting screw adjusting device according to claim 7, wherein the inner diameter of the through groove (211) is 3mm.

9. A safety valve adjusting screw adjusting device according to any one of claims 1 to 6, wherein the cylindrical body (21) is circular in cross section with a radius of 8.5mm.

10. The relief valve adjustment screw adjustment device according to any one of claims 1-6, wherein the height of the cylindrical body is 15mm.