Auxiliary limiting assembly for nuclear power plant manual regulating valve handle and nuclear power plant manual regulating valve

Abstract

The utility model discloses a nuclear power plant manual regulating valve handle auxiliary limiting assembly and a nuclear power plant manual regulating valve. The nuclear power plant manual regulating valve comprises a valve body, and a nuclear power plant manual regulating valve handle and a scale plate which are connected with each other are arranged on the valve body; the device further comprises a nuclear power plant manual regulating valve handle auxiliary limiting assembly. A limiting plate of the nuclear power plant manual regulating valve handle auxiliary limiting assembly is installed on one side of a valve flange of a valve body, a second plate body of the limiting plate is located below a nuclear power plant manual regulating valve handle, and a limiting hole of the second plate body is opposite to a long-strip-shaped hole of the nuclear power plant manual regulating valve handle. The limiting pin is used for connecting the long-strip-shaped hole and the limiting hole to assist in fixing the nuclear power plant manual adjusting valve handle. The nuclear power plant manual regulating valve handle auxiliary limiting assembly can supplement failure of a single barrier designed by a field manufacturer, and the opening degree of a nuclear power plant manual regulating valve is effectively kept. The nuclear power plant manual regulating valve handle auxiliary limiting assembly is easy to use and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to an auxiliary limiting component of a handle of a manual regulating valve of a nuclear power plant and a manual regulating valve of the nuclear power plant. Background Art

[0002] The original design of the manual control valve's straight handle is prone to automatic changes in opening due to insecure fixing or improper tightening. This can be caused by a short lever arm during equipment manufacturing, deformation or flattening of the toothed washer at the butterfly bolt's locking area, or insufficient tightening force. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a manual regulating valve handle auxiliary limiting component for a nuclear power plant and a manual regulating valve for a nuclear power plant.

[0004] The technical solution adopted by the utility model to solve its technical problems is: constructing an auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant, including a limit plate and a limit pin, wherein the limit plate is L-shaped, and the limit plate includes a first plate body and a second plate body connected to each other, the first plate body is used to be connected to the valve flange of the manual regulating valve of the nuclear power plant, the second plate body has a first surface and a second surface opposite to each other, the second plate body is provided with a plurality of limit holes, the limit holes pass through the first surface and the second surface, the limit holes are spaced apart along the length direction of the second plate body, and the limit pin is used to connect the long strip hole of the handle of the manual regulating valve in the nuclear power plant and the limit hole.

[0005] In some embodiments, the limiting hole is a circular hole.

[0006] In some embodiments, the diameter of the limiting hole is 8 mm.

[0007] In some embodiments, the spacing between any two adjacent limiting holes is 2 mm.

[0008] In some embodiments, at least two connection holes are provided on the first plate body at intervals, the connection holes are long strip holes, the length direction of the connection holes is the same as the length direction of the first plate body, and the connection holes are connected to the valve flange via fasteners.

[0009] In some embodiments, the limiting pin comprises a D-shaped limiting pin.

[0010] In some embodiments, the specification of the D-shaped limit pin is M6*70mm.

[0011] In some embodiments, the limiting plate is an integrated structure.

[0012] In some embodiments, the limiting plate is made of metal material.

[0013] The present application also discloses a manual regulating valve for a nuclear power plant, comprising a valve body, on which a manual regulating valve handle and a scale plate are connected to each other; the manual regulating valve for a nuclear power plant further comprises the auxiliary limit assembly for the manual regulating valve handle of a nuclear power plant as described in any of the above embodiments;

[0014] The limit plate of the auxiliary limit assembly of the manual regulating valve handle of the nuclear power plant is installed on one side of the valve flange of the valve body, and the second plate body of the limit plate is located below the manual regulating valve handle of the nuclear power plant. The limit hole of the second plate body is arranged opposite to the long strip hole of the manual regulating valve handle of the nuclear power plant. The limit pin of the auxiliary limit assembly of the manual regulating valve handle of the nuclear power plant is used to connect the long strip hole and the limit hole to assist in fixing the manual regulating valve handle of the nuclear power plant.

[0015] The implementation of the utility model has the following beneficial effects: the auxiliary limit assembly of the manual regulating valve handle of the nuclear power plant can supplement the failure of a single barrier designed by the on-site manufacturer, effectively maintaining the opening of the manual regulating valve of the nuclear power plant. The auxiliary limit assembly of the manual regulating valve handle of the nuclear power plant is simple to use and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of a manual regulating valve for a nuclear power plant in some embodiments of the present utility model;

[0018] Figure 2 This is one of the structural diagrams of the limiting plate in some embodiments of the present utility model;

[0019] Figure 3 This is the second structural diagram of the limiting plate in some embodiments of the present invention;

[0020] Figure 4 This is the third structural diagram of the limiting plate in some embodiments of the present invention. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0022] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0024] See Figures 1 to 4 The present invention illustrates a manual regulating valve 10 for a nuclear power plant, comprising a valve body 11, a manual regulating valve handle 13 and a scale plate 14 connected to each other. The scale plate 14 has an arcuate groove 141 formed therein. The middle portion of the manual regulating valve handle 13 is secured relative to the arcuate groove 141 via a butterfly bolt 15. The manual regulating valve 10 also includes an auxiliary limiter assembly 20 for the manual regulating valve handle.

[0025] The limit plate 21 of the auxiliary limit assembly 20 of the manual regulating valve handle of the nuclear power plant is installed on one side of the valve flange 12 of the valve body 11, and the second plate body 212 of the limit plate 21 is located below the manual regulating valve handle 13 of the nuclear power plant. The limit hole 2121 of the second plate body 212 is arranged opposite to the long hole 131 of the manual regulating valve handle 13 of the nuclear power plant. The limit pin 22 of the auxiliary limit assembly 20 of the manual regulating valve handle of the nuclear power plant is used to connect the long hole 131 and the limit hole 2121 to assist in fixing the manual regulating valve handle 13 of the nuclear power plant.

[0026] In some embodiments, the manual regulating valve handle auxiliary limit assembly 20 of the nuclear power plant includes a limit plate 21 and a limit pin 22. The limit plate 21 is L-shaped and includes a first plate body 211 and a second plate body 212 connected to each other. The first plate body 211 and the second plate body 212 are both roughly rectangular plate structures. The length of the first plate body 211 and the second plate body 212 is approximately 280 mm, the width is approximately 55 mm, and the thickness is approximately 2 mm. The limit plate 21 is an integral structure. The limit plate 21 is made of a metal material, which includes but is not limited to stainless steel, aluminum, or aluminum alloy.

[0027] The first plate body 211 is used to connect with the valve flange 12 of the manual regulating valve 10 of the nuclear power plant. The second plate body 212 has a first surface and a second surface opposite to each other. The second plate body 212 is provided with a plurality of limiting holes 2121. The limiting holes 2121 pass through the first surface and the second surface. The limiting holes 2121 are arranged at intervals along the length direction of the second plate body 212. The limiting pin 22 is used to connect the long strip hole 131 of the handle 13 of the manual regulating valve of the nuclear power plant and the limiting hole 2121.

[0028] In some embodiments, the limiting holes 2121 are circular holes. Preferably, the line connecting the axes of all the limiting holes 2121 can be the same line.

[0029] In some embodiments, the width of the elongated hole 131 is approximately 8 mm, the diameter of the limiting hole 2121 is 8 mm, and the spacing between two adjacent limiting holes 2121 is 2 mm, which can enable the manual regulating valve 10 of the nuclear power plant to be adjusted to an opening of approximately 0° to 90°.

[0030] In some embodiments, the first plate 211 is provided with at least two spaced-apart connection holes 2111. Each connection hole 2111 is an elongated, rectangular hole whose length is aligned with the length of the first plate 211. The connection holes 2111 are connected to the valve flange 12 via fasteners, including but not limited to fastening bolts. The connection holes 2111 allow for fine-tuning of the position. To prevent the manual regulating valve 10 from being actuated during on-site installation, the tail of the manual regulating valve handle 13 can be locked at any desired angle.

[0031] In some embodiments, the stop pin 22 comprises a D-shaped stop pin. The D-shaped stop pin is easy to connect and operate, and the wire ring of the D-shaped stop pin can effectively prevent the D-shaped stop pin from slipping and preventing foreign objects from falling. Preferably, the specification of the D-shaped stop pin is M6*70mm.

[0032] Preferably, the setting parameters of the limit plate 21 can also refer to Figures 2 to 4 The parameters of the limiting plate 21 may be adjusted according to actual needs, which will not be described in detail here.

[0033] As can be understood, the auxiliary limiter assembly 20 for the manual regulating valve handle of a nuclear power plant can complement the single barrier failure designed by the on-site manufacturer, effectively maintaining the opening of the manual regulating valve of a nuclear power plant. When adjusting the angle of the manual regulating valve of a nuclear power plant, it can meet any angle adjustment requirements, assist in positioning at any angle, and prevent failure caused by opening changes. It can be used in confined spaces and can adjust the locking clearance value by blind finger operation. It is easy to operate. The auxiliary limiter assembly 20 for the manual regulating valve handle of a nuclear power plant is simple to use and operate. It is not easy to drop and cause foreign matter to be trapped. The auxiliary limiter assembly 20 for the manual regulating valve handle of a nuclear power plant is cost-effective and easy to replicate.

[0034] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A manual regulating valve handle auxiliary limit assembly for a nuclear power plant, characterized in that: The invention comprises a limiting plate (21) and a limiting pin (22), wherein the limiting plate (21) is L-shaped, and comprises a first plate body (211) and a second plate body (212) connected to each other, wherein the first plate body (211) is used to be connected to a valve flange (12) of a manual regulating valve of a nuclear power plant, and the second plate body (212) has a first surface and a second surface opposite to each other, and the second plate body (212) is provided with a plurality of limiting holes (2121), wherein the limiting holes (2121) pass through the first surface and the second surface, and the limiting holes (2121) are arranged at intervals along the length direction of the second plate body (212), and the limiting pin (22) is used to connect the long strip hole (131) of the handle (13) of the manual regulating valve of the nuclear power plant with the limiting hole (2121).

2. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 1, characterized in that: The limiting hole (2121) is a circular hole.

3. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 2, characterized in that: The diameter of the limiting hole (2121) is 8 mm.

4. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 2, characterized in that: The spacing between two adjacent limiting holes (2121) is 2 mm.

5. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 1, characterized in that: At least two connection holes (2111) are provided on the first plate body (211) at intervals. The connection holes (2111) are long strip holes. The length direction of the connection holes (2111) is the same as the length direction of the first plate body (211). The connection holes (2111) are connected to the valve flange (12) via fasteners.

6. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 1, characterized in that: The limiting pin (22) comprises a D-shaped limiting pin.

7. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 6, characterized in that: The specification of the D-type limit pin is M6*70mm.

8. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 1, characterized in that: The limiting plate (21) is an integrated structure.

9. The auxiliary limit assembly for the handle of a manual regulating valve in a nuclear power plant according to claim 1, characterized in that: The limiting plate (21) is made of metal material.

10. A manual regulating valve for a nuclear power plant, characterized in that: The invention comprises a valve body (11), wherein the valve body (11) is provided with a nuclear power plant manual regulating valve handle (13) and a scale plate (14) which are connected to each other; the nuclear power plant manual regulating valve further comprises the nuclear power plant manual regulating valve handle auxiliary limit assembly according to any one of claims 1 to 9; The limiting plate (21) of the auxiliary limiting assembly of the manual regulating valve handle of the nuclear power plant is installed on one side of the valve flange (12) of the valve body (11), and the second plate body (212) of the limiting plate (21) is located below the manual regulating valve handle (13) of the nuclear power plant, the limiting hole (2121) of the second plate body (212) and the elongated hole (131) of the manual regulating valve handle (13) of the nuclear power plant are arranged relative to each other, and the limiting pin (22) of the auxiliary limiting assembly of the manual regulating valve handle of the nuclear power plant is used to connect the elongated hole (131) and the limiting hole (2121) to assist in fixing the manual regulating valve handle (13) of the nuclear power plant.

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