Hydraulic test device for welding stop valve of nuclear power plant

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By designing the water pressure test device of welding stop valve in nuclear power plant, the combined structure of support frame and joints can achieve rapid clamping and on-site compression of welding stop valves, which solves the problem that welding stop valves cannot directly clamp, improves construction efficiency and saves costs.

CN223166267UActive Publication Date: 2025-07-29GUANGXI FANGCHENGGANG NUCLEAR POWER

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Patent Information

Application Number: CN202422461064.3
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-10-11
Publication Date: 2025-07-29
Estimated Expiration: 2034-10-11

AI Technical Summary

Technical Problem

In the prior art, the welding shut-off valve cannot directly press the clamp or use joints and flange connections, resulting in multiple welding and cutting required at the construction site, which is time-consuming and labor-intensive and affects the performance of the valve.

Method used

A water pressure test device for welding shut-off valve in nuclear power plant is designed, including a support frame, inlet joint, outlet joint, inlet plate, outlet plate and positioning plate. The reliable clamping between the joint and the valve is achieved through the knob operating member, and a hydraulic test is carried out using a pressure pump.

Benefits of technology

It realizes rapid clamping and on-site compression of welding shut-off valves, saves special tool production and management costs, and improves work efficiency.

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Abstract

The utility model discloses a hydraulic test device for a welding stop valve of a nuclear power plant. The hydraulic test device comprises a support frame, an inlet joint, an outlet joint, an inlet plate, an outlet plate, a positioning plate and a pressurizing pump, according to the hydraulic test device for the welding stop valve of the nuclear power plant, the inlet connector and the outlet connector are arranged, so that an interface plane which cannot be directly sealed can be effectively converted into a sealing surface which can be directly clamped, the valve can be quickly clamped, and a hydraulic test is carried out by utilizing a pressurizing pump; the problem that the valve cannot be directly clamped or connected with a pressing tool through a connector and a flange is solved, and the manufacturing cost and the management cost of a special tool for a power plant are saved. Meanwhile, the supporting frame, the inlet plate, the outlet plate and the positioning plate are arranged, the outlet connector can be far away from or close to the stop valve through the knob operation piece, the whole hydraulic test device for the welded stop valve of the nuclear power plant can be conveniently installed on the stop valve, and the stop valve can be pressed on site without moving to a specific pressing workshop.

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Description

Technical Field

[0001] The utility model relates to the field of hydrostatic test of welded globe valves, in particular to a hydrostatic test device for welded globe valves in nuclear power plants. Background Technique

[0002] There are corresponding hydrostatic test devices for valves in nuclear power plants, including manual pump pressure boosting equipment and valve pressure test benches. Among them, manual pump pressure boosting requires the valve to be equipped with or capable of installing a pressure boosting joint; the pressure test bench requires the valve inlet to have threads, the flange can be directly connected, or the inlet and outlet are parallel and there is an available sealing surface for clamping.

[0003] However, for welded globe valves, the connection dimensions are small and some types have bevels. The direct mating force-receiving surface is small and the centering is poor, which cannot ensure sealing. Moreover, there are no direct connection components, so it is impossible to directly clamp or use joints and flanges to connect the pressure boosting tools. The common method for pressure boosting welded valves at the construction site is to weld blanking plates at both ends of the welded valve first, and then conduct strength and tightness tests on the welded valve. After the test is qualified, the blanking plates at both ends of the short pipe are cut off, which is time-consuming and laborious, and multiple welding and cutting operations affect the valve performance. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a hydrostatic test device for welded globe valves in nuclear power plants.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to construct a hydrostatic test device for welded globe valves in nuclear power plants. The welded globe valve in the nuclear power plant includes an intermediate channel and an inlet end and an outlet end located at both ends of the intermediate channel. It includes a support frame, an inlet joint, an outlet joint, an inlet plate, an outlet plate, a positioning plate, and a pressure boosting pump;

[0006] Both ends of the inlet joint are respectively connected to the pressure boosting pump and the inlet end, and are connected to the inlet plate;

[0007] One end of the outlet joint is connected to the outlet end and is connected to the outlet plate;

[0008] The inlet plate and the positioning plate are fixedly connected to the support frame, the outlet plate is movably connected to the support frame, and the outlet plate can move back and forth along the axial direction of the support frame;

[0009] The outlet plate includes a base body, a transition piece connected to the base body, a connecting rod connected to the transition piece, and an operating piece connected to the connecting rod. The connecting rod is movably connected to the positioning plate.

[0010] In some embodiments, the inlet joint includes an inlet connection portion connected to the inlet end, an inlet channel communicating with the intermediate channel, and a pressure boosting connection portion connected to the pressure boosting pump;

[0011] The outer shape of the inlet connection part matches the outer shape of the inlet end.

[0012] In some embodiments, the pressing connection part is a threaded part or a fish scale buckle.

[0013] In some embodiments, a first sealing member is provided on the inlet connection part.

[0014] In some embodiments, the outlet joint includes an outlet connection part connected to the outlet end, an outlet channel communicating with the intermediate channel, and a positioning connection part connected to the outlet plate;

[0015] The outer shape of the outlet connection part matches the outer shape of the outlet end.

[0016] In some embodiments, a second sealing member is provided on the outlet connection part.

[0017] In some embodiments, a plurality of inlet mounting holes connected to the support frame are provided on the inlet plate, a plurality of guide holes movably connected to the support frame are provided on the outlet plate, and a plurality of positioning mounting holes connected to the support frame are provided on the positioning plate;

[0018] In some embodiments, a drainage hole communicating with the outlet channel is provided on the transition piece.

[0019] In some embodiments, the operating member includes a mounting member fixedly connected to the connecting rod and a handle fixedly connected to the mounting member.

[0020] In some embodiments, the connecting rod is threadedly connected to the positioning plate; or

[0021] The connecting rod is connected to the positioning plate through a copper bushing.

[0022] Implementing the present utility model has the following beneficial effects: The hydrostatic test device for the welded stop valve in the nuclear power plant can effectively convert the interface plane that cannot be directly sealed into a directly clampable sealing surface by using the inlet joint and the outlet joint, enabling the valve to be quickly clamped, and using a pressure pump for hydrostatic testing, solving the problem that such valves cannot be directly clamped or using connectors and flange-connected pressure testing tools, saving the production cost and management cost of the special tools in the power plant. At the same time, a support frame, an inlet plate, an outlet plate, and a positioning plate are provided. By rotating the operating member, the outlet joint can be moved away from or closer to the stop valve, facilitating the installation of the hydrostatic test device for the welded stop valve in the nuclear power plant as a whole to the stop valve, enabling the stop valve to be hydrostatically tested in place without moving to a specific hydrostatic testing workshop, and can be directly and conveniently hydrostatically tested at the installation site, improving work efficiency. Description of the Drawings

[0023] To more clearly illustrate the technical solution of the present utility model, the following will further explain the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative work, other related drawings can also be obtained based on these drawings. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the hydrostatic test device for the welded stop valve in a nuclear power plant of the present utility model;

[0025] Figure 2 is a schematic diagram of the structure of the inlet plate of the present utility model;

[0026] Figure 3 is a schematic diagram of the structure of the outlet plate of the present utility model;

[0027] Figure 4 is a schematic diagram of the structure of the positioning plate of the present utility model;

[0028] Figure 5 is a schematic diagram of the structure of the inlet joint of the present utility model;

[0029] Figure 6 is a schematic diagram of the structure of the outlet joint of the present utility model. Detailed implementation manners

[0030] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the following will specifically describe the implementation manners of the present utility model with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, with a specific orientation structure and operation, and are only for the convenience of describing the technical solution, rather than indicating that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0031] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as "above" or "below" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. Terms such as "first", "second", "third", etc. are only for the convenience of describing the technical solution, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such 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.

[0032] Referring to Figures 1 to 6 , it is a hydrostatic test device for a nuclear power plant welded globe valve in some embodiments of the present utility model. The nuclear power plant welded globe valve includes an intermediate passage and an inlet end 11 and an outlet end 12 located at both ends of the intermediate passage. It includes a support frame 2, an inlet joint 3, an outlet joint 4, an inlet plate 5, an outlet plate 6, a positioning plate 7, and a pressure pump 8. Both ends of the inlet joint 3 are respectively connected to the pressure pump 8 and the inlet end 11, and are connected to the inlet plate 5. One end of the outlet joint 4 is connected to the outlet end 12 and is connected to the outlet plate 6. The inlet plate 5 and the positioning plate 7 are fixedly connected to the support frame 2, and the outlet plate 6 is movably connected to the support frame 2. The outlet plate 6 can move back and forth along the axial direction of the support frame 2. The outlet plate 6 includes a base body 61, a transition piece 62 connected to the base body 61, a connecting rod 63 connected to the transition piece 62, and an operating piece 64 connected to the connecting rod 63. The connecting rod 63 is movably connected to the positioning plate 7. Using the hydrostatic test device for the nuclear power plant welded globe valve to conduct a hydrostatic test on the globe valve offline, check the sealing performance of the valve flap and valve seat, check the pressure resistance strength of the globe valve, and ensure the qualified sealing performance before valve installation.

[0033] As Figure 1As shown, before the installation of the nuclear power plant welded stop valve, a sealing hydrostatic test needs to be carried out. An installation space for installing the stop valve is formed between the inlet joint 3 and the outlet joint 4, and the inlet joint 3 and the outlet joint 4 are respectively connected to both ends of the stop valve. The inlet plate 5 and the positioning plate 7 are fixed relative to the support frame 2. The inlet plate 5 is used to connect the inlet joint 3, and the outlet plate 6 is used to connect the outlet joint 4. The outlet joint 4 and the outlet plate 6 can move relative to the support frame 2. By operating the knob 64, the outlet joint 4 can be moved away from or closer to the stop valve to facilitate the installation of the entire nuclear power plant welded stop valve hydrostatic test device with the stop valve.

[0034] The nuclear power plant welded stop valve hydrostatic test device uses the settings of the inlet joint 3 and the outlet joint 4 to effectively convert the interface plane that cannot be directly sealed into a directly clampable sealing surface, enabling the valve to be quickly clamped. A hydrostatic test is carried out using the pressure pump 8, which solves the problem that such valves cannot be directly clamped or the use of connectors and flange-connected pressure testing tools, saving the production cost and management cost of the power plant's special tools. At the same time, the support frame 2, the inlet plate 5, the outlet plate 6, and the positioning plate 7 are provided. By operating the knob 64, the outlet joint 4 can be moved away from or closer to the stop valve to facilitate the installation of the entire nuclear power plant welded stop valve hydrostatic test device with the stop valve, enabling the stop valve to be pressure-tested in place without moving to a specific pressure testing workshop and can be directly and conveniently pressure-tested at the installation site, improving work efficiency.

[0035] As Figure 5 shown, the inlet joint 3 includes an inlet connection portion 31 connected to the inlet end 11, an inlet passage 32 communicating with the intermediate passage, and a pressure connection portion 33 connected to the pressure pump 8. The outer shape of the inlet connection portion 31 matches the outer shape of the inlet end 11. Specifically, the inlet connection portion 31 can be machined according to the model of the stop valve and the interface size of the inlet end 11, while the pressure connection portion 33 is machined corresponding to the interface of the pressure pump 8. The pressure connection portion 33 can be a threaded portion or a fish scale buckle and can be adjusted according to actual needs. A first seal 34 is provided on the inlet connection portion 31, which improves the sealing performance between the inlet joint 3 and the inlet end 11 and ensures the sealing performance under high pressure. The first seal 34 can be an O-ring.

[0036] As Figure 6As shown, the outlet joint 4 includes an outlet connection portion 41 connected to the outlet end 12, an outlet channel 42 communicating with the intermediate channel, and a positioning connection portion 43 connected to the outlet plate 6. The outer shape of the outlet connection portion 41 matches the outer shape of the outlet end 12. The outer shape of the outlet connection portion 41 matches the outer shape of the outlet end 12. Specifically, the outlet connection portion 41 can be machined according to the model of the stop valve and the interface size of the outlet end 12. A second seal 44 is provided on the outlet connection portion 41, which improves the sealing performance between the outlet joint 4 and the outlet end 12 and ensures the sealing performance under high pressure. The second seal 44 can be an O-ring.

[0037] As Figures 1 to 4 As shown, a plurality of inlet mounting holes 51 connected to the support frame 2 are provided on the inlet plate 5, a plurality of guide holes 65 movably connected to the support frame 2 are provided on the outlet plate 6, and a plurality of positioning mounting holes 71 connected to the support frame 2 are provided on the positioning plate 7. The inlet mounting holes 51 and the positioning mounting holes 71 can be bolt holes. The guide holes 65 are through holes, and the side columns of the support frame 2 can pass through the guide holes 65.

[0038] As Figure 3 As shown, a drainage hole 621 communicating with the outlet channel 42 is provided on the transition piece 62. The drainage hole 621 is used to measure the leakage amount during pressure testing and can drain water after the pressure testing is completed. The operating member 64 includes a mounting member 641 fixedly connected to the connecting rod 63 and a handle 642 fixedly connected to the mounting member 641. The mounting member 641 can be a nut, which can be welded to the connecting rod 63. In addition, the connecting rod 63 is threadedly connected to the positioning plate 7; or the connecting rod 63 is connected to the positioning plate 7 through a copper bushing.

[0039] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A hydrostatic test device for a welded globe valve in a nuclear power plant. The welded globe valve in the nuclear power plant includes an intermediate passage and an inlet end (11) and an outlet end (12) located at both ends of the intermediate passage. It is characterized in that, It includes a support frame (2), an inlet joint (3), an outlet joint (4), an inlet plate (5), an outlet plate (6), a positioning plate (7) and a pressure pump (8); Both ends of the inlet joint (3) are respectively connected to the pressure pump (8) and the inlet end (11), and are connected to the inlet plate (5); One end of the outlet joint (4) is connected to the outlet end (12), and is connected to the outlet plate (6); The inlet plate (5) and the positioning plate (7) are fixedly connected to the support frame (2), the outlet plate (6) is movably connected to the support frame (2), and the outlet plate (6) can move back and forth along the axial direction of the support frame (2); The outlet plate (6) includes a base body (61), a transition piece (62) connected to the base body (61), a connecting rod (63) connected to the transition piece (62) and an operating piece (64) connected to the connecting rod (63), and the connecting rod (63) is movably connected to the positioning plate (7).

2. The hydrostatic test device for the welded stop valve of a nuclear power plant according to claim 1, characterized in that, The inlet joint (3) includes an inlet connecting portion (31) connected to the inlet end (11), an inlet channel (32) communicating with the intermediate channel and a pressure connecting portion (33) connected to the pressure pump (8); The outer shape of the inlet connecting portion (31) matches the outer shape of the inlet end (11).

3. The hydrostatic test device for the nuclear power plant welded stop valve according to claim 2, characterized in that, The pressure connecting portion (33) is a threaded portion or a fish scale buckle.

4. The hydrostatic test device for the nuclear power plant welded stop valve according to claim 2, wherein, A first sealing member (34) is provided on the inlet connecting portion (31).

5. The hydrostatic test device for the welded stop valve of a nuclear power plant according to claim 1, characterized in that, The outlet joint (4) includes an outlet connecting portion (41) connected to the outlet end (12), an outlet channel (42) communicating with the intermediate channel and a positioning connecting portion (43) connected to the outlet plate (6); The outer shape of the outlet connecting portion (41) matches the outer shape of the outlet end (12).

6. The hydrostatic test device for the welded stop valve of a nuclear power plant according to claim 5, characterized in that, A second sealing member (44) is provided on the outlet connecting portion (41).

7. The hydrostatic test device for the welded stop valve of a nuclear power plant according to claim 1, characterized in that, A plurality of inlet mounting holes (51) connected to the support frame (2) are provided on the inlet plate (5), a plurality of guide holes (65) movably connected to the support frame (2) are provided on the outlet plate (6), and a plurality of positioning mounting holes (71) connected to the support frame (2) are provided on the positioning plate (7).

8. The hydrostatic test device for the nuclear power plant welded stop valve according to claim 5, characterized in that, A drainage hole (621) communicating with the outlet channel (42) is provided on the transition piece (62).

9. The hydrostatic test device for the welded stop valve of a nuclear power plant according to claim 1, characterized in that, The operating piece (64) includes a mounting piece (641) fixedly connected to the connecting rod (63) and a handle (642) fixedly connected to the mounting piece (641).

10. The hydrostatic test device for the welded stop valve of a nuclear power plant according to claim 1, characterized in that, The connecting rod (63) is threadedly connected to the positioning plate (7); or The connecting rod (63) is connected to the positioning plate (7) through a copper sleeve.