Auxiliary device for measuring valve stroke of nuclear power plant

By designing a valve stroke measurement auxiliary device for nuclear power plants and combining connecting supports and limiters with a depth vernier caliper, the accuracy and safety issues of valve stroke measurement are solved, and efficient and accurate valve stroke measurement is achieved.

CN223412967UActive Publication Date: 2025-10-03TAISHAN NUCLEAR POWER JOINT VENTURE CO LTD
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Patent Information

Application Number
CN202423045343.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-10-03
Estimated Expiration
2034-12-10

AI Technical Summary

Technical Problem

In the prior art, when a needle-type vernier caliper is used to measure the valve stroke of a nuclear power plant, the measured data is prone to deviation and is difficult to observe, and the placement of the needle-type vernier caliper is unstable.

Method used

An auxiliary device for measuring the valve stroke of a nuclear power plant is designed, which includes a connecting support and a limiter. The connecting support is fixed to the valve stem through a threaded connection. The limiter is used to prevent the valve from closing abnormally. The device is combined with a depth vernier caliper for measurement.

Benefits of technology

The accuracy of valve stroke measurement and the convenience of observation are improved, and damage to operators and sealing surfaces caused by abnormal valve closing is prevented.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a nuclear power plant valve stroke measurement auxiliary device, which comprises a connecting support piece and a limiting piece, the connecting support piece comprises a rod-shaped main body, the axial first end of the rod-shaped main body is provided with a thread part used for being connected with the upper end of a valve rod of a nuclear power plant valve, and the axial second end of the rod-shaped main body is provided with a columnar part; the diameter of the columnar part is greater than that of the rod-shaped main body; the limiting piece is used for being arranged between a valve rod and a columnar part of the nuclear power plant valve and comprises a table body, the table body is provided with an upper surface and a lower surface which are opposite, the table body is provided with a through groove penetrating through the upper surface and the lower surface, and the through groove extends and penetrates to the circumferential side face of the table body. By applying the nuclear power plant valve stroke measurement auxiliary device, a depth vernier caliper can be configured for stroke measurement, measurement data are easier to observe, and the measurement accuracy is high.
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Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a valve stroke measurement auxiliary device for a nuclear power plant. Background Art

[0002] The related technology for measuring the valve stroke of a nuclear power plant is to use a needle-type vernier caliper to pass through the valve cover and enter the interior of the valve cover. The bottom of the needle-type vernier caliper abuts the top of the valve stem inside the valve cover. The valve stem then moves and the measurement is performed. Due to the small size of the needle-type vernier caliper, it is difficult for staff to observe the data. When the needle-type vernier caliper is not placed stably, the measurement data is prone to deviation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a valve stroke measurement auxiliary device for a nuclear power plant.

[0004] The technical solution adopted by the utility model to solve the technical problem is as follows: constructing a nuclear power plant valve stroke measurement auxiliary device, including a connecting support member and a limit member, the connecting support member including a rod-shaped body, the axial first end of the rod-shaped body is provided with a threaded portion for connecting to the upper end of the valve stem of the nuclear power plant valve, the axial second end of the rod-shaped body is provided with a columnar portion, the diameter of the columnar portion is larger than the diameter of the rod-shaped body;

[0005] The limit member is used to be arranged between the valve stem of the nuclear power plant valve and the columnar portion. The limit member includes a platform body, which has a relative upper surface and a lower surface. The platform body is provided with a through groove passing through the upper surface and the lower surface, and the through groove extends through the circumferential side of the platform body.

[0006] In some embodiments, the axial length of the threaded portion is 20 mm.

[0007] In some embodiments, the axial length of the columnar portion is 10 mm.

[0008] In some embodiments, the columnar portion is cylindrical, and the diameter of the columnar portion is 16 mm.

[0009] In some embodiments, the rod-shaped body has a diameter of 9 mm.

[0010] In some embodiments, the platform includes a first main body and a second main body, the second main body is arranged on the upper end surface of the first main body, and the first main body and the second main body are coaxially arranged, and the through groove passes through part of the structure of the first main body and the second main body.

[0011] In some embodiments, the diameter of the second body portion is smaller than the diameter of the first body portion.

[0012] In some embodiments, the axial thickness of the first main body portion is 10 mm, and the axial thickness of the second main body portion is 5 mm.

[0013] In some embodiments, the connecting support member is an integral structure, and the limiting member is an integral structure.

[0014] In some embodiments, the connecting support and the limiting member are both made of brass.

[0015] The implementation of the utility model has the following beneficial effects: the nuclear power plant valve stroke measurement auxiliary device includes a connecting support and a limit member, the connecting support includes a rod-shaped main body, the axial first end of the rod-shaped main body is provided with a threaded portion for connecting to the upper end of the valve stem of the nuclear power plant valve, the axial second end of the rod-shaped main body is provided with a columnar portion, the diameter of the columnar portion is larger than the diameter of the rod-shaped main body; the limit member is used to be arranged between the valve stem and the columnar portion of the nuclear power plant valve, the limit member includes a platform, the platform has relative upper and lower surfaces, the platform is provided with a through groove penetrating the upper and lower surfaces, and the through groove extends through the circumferential side of the platform.

[0016] The connecting support member passes through a through hole at the top of the bonnet of the nuclear power plant valve. The threaded portion of the connecting support member is threadedly connected to the threaded hole at the top of the valve stem of the nuclear power plant valve. A depth vernier caliper is placed on the upper surface of the bonnet of the nuclear power plant valve, and the measuring base of the depth vernier caliper is placed on the upper surface of the columnar portion of the connecting support member. When the nuclear power plant valve is measured, the movement of the valve stem drives the connecting support member to move in the height direction, at which time the depth vernier caliper can perform measurements and observations. The through groove of the limiter can be fixed between the rod-shaped body of the bonnet upper surface and the columnar portion of the nuclear power plant valve. The limiter can be used to prevent the nuclear power plant valve from abnormally closing and injuring the operator and damaging the sealing surface during the measurement and adjustment process.

[0017] The valve stroke measurement auxiliary device for nuclear power plants can be configured with a depth vernier caliper for stroke measurement, making it easier to observe measurement data and achieving higher measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 This is a structural diagram of a connecting support member of a nuclear power plant valve stroke measurement auxiliary device in some embodiments of the present utility model;

[0020] Figure 2 This is a schematic diagram of the dimensions of the connecting support member of the nuclear power plant valve stroke measurement auxiliary device in some embodiments of the present utility model;

[0021] Figure 3 It is a schematic diagram of the dimensions of the connecting support member of the nuclear power plant valve stroke measurement auxiliary device in other embodiments of the utility model;

[0022] Figure 4 It is a schematic diagram of the dimensions of the connecting support member of the nuclear power plant valve stroke measurement auxiliary device in other embodiments of the utility model;

[0023] Figure 5 This is one of the structural schematic diagrams of the limiter of the nuclear power plant valve stroke measurement auxiliary device in other embodiments of the present utility model;

[0024] Figure 6 This is the second structural schematic diagram of the limiter of the nuclear power plant valve stroke measurement auxiliary device in other embodiments of the present utility model;

[0025] Figure 7 This is one of the dimension diagrams of the limiter of the valve stroke measurement auxiliary device in a nuclear power plant in other embodiments of the present utility model;

[0026] Figure 8 This is the second schematic diagram of the dimensions of the limiter of the auxiliary device for measuring the stroke of a valve in a nuclear power plant in other embodiments of the present invention;

[0027] Figure 9 It is a schematic diagram of the application of the limiter of the nuclear power plant valve stroke measurement auxiliary device in other embodiments of the utility model. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] See Figures 1 to 9 The present invention illustrates a nuclear power plant valve stroke measurement auxiliary device, comprising a connecting support member 10 and a stop member 20. The connecting support member 10 includes a rod-shaped body 11, which may be a round rod. A threaded portion 12 is provided at a first axial end of the rod-shaped body 11 for connection to the upper end of a valve stem of a nuclear power plant valve. A columnar portion 13 is provided at a second axial end of the rod-shaped body 11. The rod-shaped body 11, the threaded portion 12, and the columnar portion 13 are coaxially arranged. The diameter of the columnar portion 13 is greater than that of the rod-shaped body 11. Such nuclear power plant valves include, but are not limited to, nuclear power plant solenoid valves, such as a DMS6 solenoid valve for nuclear power plants.

[0032] The limit member 20 is used to be arranged between the valve stem of the nuclear power plant valve and the columnar portion 13. The limit member 20 includes a platform 21, which has an upper surface and a lower surface relative to each other. The platform 21 is provided with a through groove 22 passing through the upper surface and the lower surface. The through groove 22 extends through the circumferential side of the platform 21.

[0033] In some embodiments, the axial length of the threaded portion 12 is 20 mm, and the thread specification is M8×1.25.

[0034] In some embodiments, the axial length of the columnar portion 13 is 10 mm.

[0035] In some embodiments, the columnar portion 13 is cylindrical, and the diameter of the columnar portion 13 is 16 mm.

[0036] In some embodiments, the rod-shaped body 11 has a diameter of 9 mm.

[0037] Of course, the structural dimensions of the connecting support 10 can refer to Figures 2 to 4 The implementation is not specifically limited here.

[0038] like Figures 5 to 8 As shown, in some embodiments, the platform 21 includes a first main body 211 and a second main body 212. The second main body 212 is provided on the upper end surface of the first main body 211. The first main body 211 and the second main body 212 are coaxially arranged. The through slot 22 passes through the first main body 211 and the second main body 212. Both the first main body 211 and the second main body 212 can be flat cylindrical structures.

[0039] In some embodiments, the diameter of the second body portion 212 is smaller than that of the first body portion 211. For example, the diameter of the first body portion 211 may be 50 mm, and the diameter of the second body portion 212 may be 30 mm. The first body portion 211 can provide sufficient support, and the second body portion 212 can create a certain operating space between the upper surface of the first body portion 211 and the lower surface of the columnar portion 13.

[0040] In some embodiments, the axial thickness of the first main body portion 211 is 10 mm, and the axial thickness of the second main body portion 212 is 5 mm.

[0041] In some embodiments, the connecting support member 10 is an integral structure, and the limiting member 20 is an integral structure.

[0042] In some embodiments, the connecting support 10 and the limiting member 20 are both made of brass. Brass is softer than the structural material of nuclear power plant valves and will not cause damage to the nuclear power plant valves.

[0043] In some embodiments, the nuclear power plant valve stroke measurement auxiliary device may also include a depth vernier caliper 300, which can be placed on the top of the valve cover 100 of the nuclear power plant valve, and the measuring base 301 of the depth vernier caliper 300 can abut against the upper surface of the columnar portion 13 of the connecting support 10.

[0044] like Figure 9As shown, the nuclear power plant valve stroke measurement auxiliary device is used as follows: the connecting support 10 passes through the through hole on the top of the valve cover 100 of the nuclear power plant valve, and the threaded portion 12 of the connecting support 10 is threadedly connected to the top threaded hole of the valve stem 200 of the nuclear power plant valve. The depth vernier caliper 300 is placed on the upper surface of the valve cover 100 of the nuclear power plant valve, and the measuring base 301 of the depth vernier caliper 300 is placed on the upper surface of the columnar portion 13 of the connecting support 10. When the nuclear power plant valve is measured, the movement of the valve stem 200 will drive the connecting support 10 to move in the height direction. At this time, the depth vernier caliper 300 can be used for measurement and observation.

[0045] Furthermore, the through groove 22 of the limit member 20 can clamp the rod-shaped body 11 between the upper surface of the valve cover 100 of the nuclear power plant valve and the columnar portion 13. The limit member 20 can be used to prevent the nuclear power plant valve from closing abnormally and injuring the operator and damaging the sealing surface during the process of measuring and adjusting the stroke.

[0046] Understandably, the application of the nuclear power plant valve stroke measurement auxiliary device can be configured with a depth vernier caliper 300 for stroke measurement, and the measurement data is easier to observe and the measurement accuracy is higher.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0048] 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 valve stroke measurement auxiliary device for a nuclear power plant, characterized in that: The invention comprises a connecting support member (10) and a limiting member (20), wherein the connecting support member (10) comprises a rod-shaped body (11), a threaded portion (12) for connecting to the upper end of a valve stem of a nuclear power plant valve is provided at a first axial end of the rod-shaped body (11), and a columnar portion (13) is provided at a second axial end of the rod-shaped body (11), wherein the diameter of the columnar portion (13) is larger than the diameter of the rod-shaped body (11); The limiting member (20) is used to be arranged between the valve stem of the nuclear power plant valve and the columnar portion (13), and the limiting member (20) includes a platform (21), the platform (21) has an upper surface and a lower surface relative to each other, and the platform (21) is provided with a through groove (22) passing through the upper surface and the lower surface, and the through groove (22) extends through the circumferential side of the platform (21).

2. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 1, characterized in that: The axial length of the threaded portion (12) is 20 mm.

3. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 1, characterized in that: The axial length of the columnar portion (13) is 10 mm.

4. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 3, characterized in that: The columnar portion (13) is cylindrical, and the diameter of the columnar portion (13) is 16 mm.

5. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 1, characterized in that: The diameter of the rod-shaped body (11) is 9 mm.

6. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 1, characterized in that: The platform (21) comprises a first main body (211) and a second main body (212); the second main body (212) is arranged on the upper end surface of the first main body (211), and the first main body (211) and the second main body (212) are coaxially arranged; the through groove (22) passes through a portion of the structure of the first main body (211) and the second main body (212).

7. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 6, characterized in that: The diameter of the second main body portion (212) is smaller than the diameter of the first main body portion (211).

8. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 6, characterized in that: The axial thickness of the first main body portion (211) is 10 mm, and the axial thickness of the second main body portion (212) is 5 mm.

9. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 1, characterized in that: The connecting support member (10) is an integral structure, and the limiting member (20) is an integral structure.

10. The valve stroke measurement auxiliary device for a nuclear power plant according to claim 1, characterized in that: The connecting support member (10) and the limiting member (20) are both made of brass.