Large-diameter valve flange pressure test inspection device

Abstract

The utility model discloses a large-diameter valve flange pressure test inspection device which comprises a valve and an outer hexagonal plug screw, a valve body flange is arranged on the side wall of the valve, a leak detection threaded hole is formed in the side wall of the valve body flange, a channel communicated with the leak detection threaded hole is formed in the end face of the valve body flange, and the outer hexagonal plug screw is arranged in the channel. According to the utility model, the valve body flange is connected with the flange of the downstream pipe, the fastener and the assembly hole site are fastened through standard torsion, and under the condition that the large-diameter valve flange does not work at all, a medium with the same pressure as that of a system is injected into the leak detection threaded hole, so that the leak detection is completed. Therefore, the sealing performance of the connecting part of the valve body flange and the pipeline flange can be quickly checked, the pressure test checking cost is greatly reduced, the structure is simple, the operation is simple and convenient, safety and reliability are realized, the applicability is wide, and the effect is good.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment technology, specifically to a pressure testing device for large-diameter valve flanges. Background Technology

[0002] Large-diameter valve flanges are commonly used in water conservancy, hydropower, pumping stations, and other fields. Pressure testing of large-diameter valve flanges requires starting a water pump and injecting water at a certain pressure into the pipeline to test the valve's sealing performance. This operation is time-consuming, labor-intensive, and costly.

[0003] To address these issues, this application presents a pressure testing device for large-diameter valve flanges. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the problems existing in the use of the above and / or large-diameter valve flange pressure testing device, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a pressure testing device for large-diameter valve flanges. By connecting the valve body flange to the flange of the downstream pipe and using fasteners and assembly holes to tighten with standard torque, a medium with the same pressure as the system is injected into the leak detection threaded hole when the large-diameter valve flange is not working at all. This allows for rapid inspection of the sealing performance of the connection between the valve body flange and the pipe flange. The pressure testing cost is greatly reduced, the structure is simple, the operation is convenient, it is safe and reliable, it has wide applicability, and the effect is good.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] A pressure testing device for large-diameter valve flanges, comprising:

[0009] The valve has a valve body flange on its side wall, a leak detection threaded hole on the side wall of the valve body flange, and a channel communicating with the leak detection threaded hole on the end face of the valve body flange.

[0010] An external hexagonal screw plug, which mates with the inlet of a leak detection threaded hole.

[0011] As a preferred embodiment of the large-diameter valve flange pressure testing device of this utility model, the valve body flange is disposed on the outlet side of the valve, and the side wall of the valve body flange is provided with assembly holes.

[0012] As a preferred embodiment of the large-diameter valve flange pressure testing device of this utility model, the end face of the valve body flange is provided with a first sealing ring and a second sealing ring, and the second sealing ring is located inside the first sealing ring.

[0013] In a preferred embodiment of the large-diameter valve flange pressure testing device of this utility model, the channel is located between the first sealing ring and the second sealing ring.

[0014] As a preferred embodiment of the large-diameter valve flange pressure testing device of this utility model, a copper gasket is provided on the outer periphery of the external hexagonal plug, and the copper gasket is pressed against the inlet of the leak detection threaded hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This large-diameter valve flange pressure testing device connects the valve body flange to the downstream pipe flange and uses fasteners and assembly holes to tighten with standard torque. When the large-diameter valve flange is not working at all, a medium with the same pressure as the system is injected into the leak detection threaded hole, thereby quickly checking the sealing performance of the connection between the valve body flange and the pipe flange. The pressure testing cost is greatly reduced, the structure is simple, the operation is convenient, it is safe and reliable, it has wide applicability, and the effect is good. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of the large-diameter valve flange pressure testing device of this utility model;

[0018] Figure 2 This is a schematic diagram of the valve body flange section of the large-diameter valve flange pressure testing device of this utility model.

[0019] 100. Valve; 110. Valve body flange; 111. Assembly hole; 112. Leak detection threaded hole; 113. Channel; 114. First sealing ring; 115. Second sealing ring; 200. External hexagonal plug; 210. Copper gasket. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure will not be enlarged to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] This utility model provides a pressure testing device for large-diameter valve flanges. It connects the valve body flange to the flange of the downstream pipe and uses fasteners and assembly holes to tighten them with standard torque. When the large-diameter valve flange is not working at all, a medium with the same pressure as the system is injected into the leak detection threaded hole. This allows for a quick check of the sealing performance of the connection between the valve body flange and the pipe flange. The pressure testing cost is greatly reduced. The device has a simple structure, is easy to operate, is safe and reliable, has wide applicability, and is effective.

[0024] Figures 1-2 The diagram shown is a structural schematic of one embodiment of the large-diameter valve flange pressure testing device of this utility model. Please refer to [link / reference]. Figures 1-2 The large-diameter valve flange pressure testing device of this embodiment includes a valve 100 and an external hexagonal plug 200 as its main body.

[0025] Valve 100 is connected to the flange of the downstream pipe via valve body flange 110. It is secured with fasteners and mounting holes 111 using standard torque. With the large-diameter valve 100 flange completely deactivated, a medium at the same pressure as the system is injected into the leak detection threaded hole 112. This allows for a rapid check of the sealing performance of the connection between the valve body flange 110 and the pipe flange, significantly reducing pressure testing costs. The valve is simple in structure, easy to operate, safe and reliable, widely applicable, and effective. Specifically, the valve 100 has a valve body flange 110 on its side wall. The valve body flange 110 has a leak detection threaded hole 112 on its side wall and a channel 113 communicating with the leak detection threaded hole 112 on its end face. In this embodiment, the valve body flange 110 is located on the outlet side of the valve 100. The valve body flange 110 has an assembly hole 111 on its side wall and a first sealing ring 114 and a second sealing ring 115 on its end face. The second sealing ring 115 is located inside the first sealing ring 114 and the channel 113 is located between the first sealing ring 114 and the second sealing ring 115.

[0026] During pressure testing, the external hexagonal plug 200 can be unscrewed to inject medium into the detection screw hole. Specifically, the external hexagonal plug 200 is fitted with the inlet of the leak detection threaded hole 112. In this embodiment, a copper gasket 210 is provided on the outer periphery of the external hexagonal plug 200, and the copper gasket 210 is pressed against the inlet of the leak detection threaded hole 112.

[0027] Combination Figures 1-2 The pressure testing device for large-diameter valve flanges in this embodiment is used as follows: the valve body flange 110 is connected to the flange of the downstream pipe, and fasteners are used to tighten the device with standard torque at the assembly hole 111. With the large-diameter valve 100 flange completely non-operating, a medium with the same pressure as the system is injected into the leak detection threaded hole 112 to quickly check the sealing performance of the connection between the valve body flange 110 and the pipe flange. The pressure testing cost is greatly reduced, the structure is simple, the operation is convenient, it is safe and reliable, it has wide applicability, and the effect is good.

[0028] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pressure testing device for large-diameter valve flanges, characterized in that, include: The valve (100) has a valve body flange (110) on its side wall, and a leak detection threaded hole (112) is provided on the side wall of the valve body flange (110). The end face of the valve body flange (110) is provided with a channel (113) communicating with the leak detection threaded hole (112). External hexagonal plug (200), which engages with the inlet of the leak detection threaded hole (112).

2. The pressure testing device for large-diameter valve flanges according to claim 1, characterized in that, The valve body flange (110) is located on the outlet side of the valve (100), and the side wall of the valve body flange (110) is provided with mounting holes (111).

3. The pressure testing device for large-diameter valve flanges according to claim 2, characterized in that, The valve body flange (110) is provided with a first sealing ring (114) and a second sealing ring (115) on its end face, and the second sealing ring (115) is located inside the first sealing ring (114).

4. The pressure testing device for large-diameter valve flanges according to claim 3, characterized in that, The channel (113) is located between the first sealing ring (114) and the second sealing ring (115).

5. The pressure testing device for large-diameter valve flanges according to claim 4, characterized in that, A copper gasket (210) is provided on the outer periphery of the external hexagonal plug (200), and the copper gasket (210) is pressed against the inlet of the leak detection threaded hole (112).

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