Clean type efficient multifunctional valve pressure test method

Abstract

The invention discloses a clean type efficient multifunctional valve pressure testing method, and relates to the technical field of clean valve pressure testing. Valves of the same specification, the same size and the same type are installed on a pressure testing table, a jack assembly and a valve flange are connected and pressed tightly, and high-purity nitrogen is supplied to a pressurizing assembly; high-purity nitrogen is fed into a control valve through the control valve to detect whether the flange surface leaks air or not and whether the joint leaks air or not, the control valve is closed after the pressure rises to a certain requirement, whether bubbles exist in each water bottle container or not is observed, and if no bubbles exist in a certain period of time, qualification is indicated; or whether pressure reduction exists in each pressure gauge or not is observed, if no pressure reduction exists in a certain time, the pressure is qualified, a jack assembly is used as sealing surface pressure, a connecting surface with a valve flange adopts a clean PTFE plate, the cleanliness of the valve is ensured in the pressure test process, the pollution risk to the cleanliness in the valve is reduced, and the pressure test table can test the pressure of four valves at the same time; the time is greatly shortened, the working efficiency is improved, and the pressure test construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure testing of clean valves, and specifically to a method for pressure testing clean, highly efficient and multi-functional valves. Background Art

[0002] With the national high-quality development plan, the requirements for the purity and cleanliness of new materials are getting higher and higher, especially for electronic-grade chemicals, ultra-clean polymers, etc. Their production equipment and pipelines need to be resistant to high pressure, corrosion, and polished clean. According to national regulations, valves entering the factory are randomly inspected in proportion (sent to a qualified testing institution for testing). Due to the requirements of high pressure and cleanliness, external testing institutions cannot meet these conditions, and the owner requires the construction party to conduct on-site pressure testing of the valves entering the factory.

[0003] During the traditional valve pressure testing process, it is impossible to ensure the internal cleanliness of the valve, which is likely to cause oil and metal particles inside the valve. Secondly, only single-valve pressure testing can be carried out: for the airtight test, only one side can be tested, and the other side needs to be separately switched for installation and removal once. In addition, when pressurizing each valve, blind plates, bolts need to be installed and removed, resulting in low efficiency. Therefore, according to the actual usage situation, the above-mentioned existing technology is improved. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above and / or problems existing in the prior art, the present invention is proposed.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for pressure testing clean, highly efficient and multi-functional valves, the pressure testing method comprising the following steps:

[0008] S1: Install valves of the same specification, size, and type on the pressure testing bench. The valves are flange valves with dimensions DN15 - DN200, and are connected and tightened to the valve flange using a jack assembly (valve in the closed state);

[0009] S3: Send high-purity nitrogen gas to the pressurization assembly, and through a control valve, send the high-purity nitrogen gas into the control valve to detect whether there is air leakage at the flange surface and whether there is air leakage at the connection. The maximum test pressure is 3 Mpa;

[0010] S4: After the pressure rises to a certain requirement, close the control valve;

[0011] S5: Observe whether there are bubbles in each water bottle container. If there are no bubbles within a certain period of time, it indicates qualification; or observe whether there is pressure reduction in each pressure gauge. If there is no decrease within a certain period of time, it indicates qualification.

[0012] Furthermore: The valve pressure test bench includes a base. The top of the base is connected with support pipes through four corners. And there is a support channel steel connected to the outer wall of the support pipe close to the base. And the top of the support pipe is connected with a top channel steel. And the bottom of the top channel steel is connected with a jack assembly. And the bottom of the jack assembly is connected with the top of the support channel steel. And valve pressure test assemblies are connected to all four sides of the base. And the top of the valve pressure test assembly is connected with a stainless steel pipe. And the stainless steel pipe is communicated with the pressurization assembly through pipe fittings. The bottom of the valve pressure test assembly is connected with a water bottle container through an output hose.

[0013] Furthermore: The pressurization assembly includes a support frame. A pressure booster pump is installed on the support frame. And the air outlet end of the pressure booster pump is connected with an air outlet hose through a distributor. And the outer ends of the air outlet hoses are respectively communicated with the stainless steel pipe.

[0014] Furthermore: The bottom of the valve pressure test assembly is connected with a pressure gauge through an output hose.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] During the pressure test process, the cleanliness of the valve is ensured. The cleanliness should meet the system requirements: particles: ≥0.10um and <0.036 particles / L. Ensure that the valve is not contaminated during the pressure test process, reduce the risk of contamination of the internal cleanliness of the valve. The pressure test bench can simultaneously perform pressure tests on 4 valves, greatly reducing time, increasing work efficiency, improving the efficiency of pressure test construction, being convenient for disassembly and assembly, reducing flange blind plates, and the steps of bolt installation and disassembly.

[0017] Other features and advantages of the present application will be described in the subsequent specification. And, partly, they will be obvious from the specification, or can be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the written specification and the drawings.

[0018] The technical solutions of the present application will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Structural schematic diagram of the present invention;

[0021] Figure 2 Structural schematic diagram of the connection pressure gauge of the present invention.

[0022] In the figure: 100, valve pressure test bench; 101, base; 102, support channel steel; 103, support pipe; 104, top channel steel; 105, jack assembly; 106, valve pressure test assembly; 107, stainless steel pipe; 108, water bottle container; 109, pressure gauge; 200, pressurization assembly; 201, support frame; 202, booster pump; 203, outlet hose. Specific embodiments

[0023] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0024] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0025] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0026] Thirdly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0027] Please refer to Figure 1 and Figure 2 , the present invention provides a technical solution: a clean, efficient and multi-functional valve pressure test method, and its pressure test method includes the following steps:

[0028] S1: Install valves of the same specification, size and type on the pressure test bench 100. The valves are flanged valves with a size of DN15 - DN200, and use the 105 jack assembly to connect and press tightly with the valve flange (valve in the closed state);

[0029] S3: Send high-purity nitrogen gas to the pressurizing assembly 200. Through the control valve, send the high-purity nitrogen gas into the control valve to detect whether the flange surface leaks air and whether there is air leakage at the connection. The maximum test pressure is 3 Mpa.

[0030] S4: After the pressure rises to a certain requirement, close the control valve.

[0031] S5: Observe whether there are bubbles in each 108 water bottle container. If there are no bubbles within a certain time, it indicates qualification; or observe whether there is pressure drop in each 109 pressure gauge. If there is no drop within a certain time, it indicates qualification.

[0032] It should be noted that all pressure test connectors, gas sources, and water sources are subjected to cleaning treatment. After the test is completed, clean the inside of the valve with a clean cloth and seal the valve port with a PVC film. The pressure test staff are equipped with clean gloves, clean cloth, and alcohol.

[0033] Preferably, the pressure test environment is in a clean booth. The four channels of the valve pressure test bench 100 can simultaneously conduct pressure test on valves of the same size. The valve pressure test bench 100 uses two whole 30-mm thick steel plates as the sealing surface, uses the jack assembly 105 as the sealing surface pressure, and uses a clean PTFE plate for the connection surface with the valve flange. The valve pressure test bench 100 includes a base 101. The top of the base 101 is connected with support pipes 103 at the four corners. And support channels 102 are connected to the outer wall of the support pipes 103 close to the base 101. And a top channel 104 is connected to the top of the support pipes 103. And a jack assembly 105 is connected to the bottom of the top channel 104. And the bottom of the jack assembly 105 is connected to the top of the support channel 102. And valve pressure test assemblies 106 are connected to the four sides of the base 101. And stainless steel pipes 107 are connected to the tops of the valve pressure test assemblies 106. And the stainless steel pipes 107 are communicated with the pressurizing assembly 200 through pipe fittings. The bottoms of the valve pressure test assemblies 106 are connected with water bottle containers 108 through output hoses, or the bottoms of the valve pressure test assemblies 106 are connected with pressure gauges 109 through output hoses. Replace the water bottle container 108 with a pressure gauge 109 to conduct simultaneous water and gas tests. The pressurizing assembly 200 includes a support frame 201. A pressurizing pump 202 is installed on the support frame 201. And the air outlet end of the pressurizing pump 200 is connected with an outlet hose 203 through a distributor. And the outer ends of the outlet hoses 203 are respectively communicated with the stainless steel pipes 107.

[0034] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those ordinary technical personnel who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine work of design, manufacturing, and production.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A clean, efficient and multifunctional valve pressure testing method, characterized in that: The pressure test method includes the following steps: S1: Install valves of the same specification, size and type on the pressure test bench (100), and use the jack assembly (105) to connect and press the valve flange (valve closed state); S3: High-purity nitrogen is delivered to the booster assembly (200), and the high-purity nitrogen is delivered to the control valve through the control valve to detect whether the flange surface is leaking and whether there is leakage at the connection; S4: Close the control valve after the pressure rises to a certain requirement; S5: Observe whether there are bubbles in each (108) water bottle container. If there are no bubbles within a certain period of time, it means it is qualified; or observe whether there is a pressure drop in each (109) pressure gauge. If there is no pressure drop within a certain period of time, it means it is qualified.

2. A clean, efficient and multifunctional valve pressure testing method according to claim 1, characterized in that: The valve pressure test bench (100) comprises a base (101), the top of the base (101) is connected to a support tube (103) through four corners, and the outer wall of the support tube (103) close to the base (101) is connected to a support channel steel (102), the top of the support tube (103) is connected to a top channel steel (104), the bottom of the top channel steel (104) is connected to a jack assembly (105), and the bottom of the jack assembly (105) is connected to the top of the support channel steel (102), and the four sides of the base (101) are connected to valve pressure test assemblies (106), and the top of the valve pressure test assembly (106) is connected to a stainless steel pipe (107), and the stainless steel pipe (107) is connected to a booster assembly (200) through a pipe fitting, and the bottom of the valve pressure test assembly (106) is connected to a water bottle container (108) through an output hose.

3. A clean, efficient and multifunctional valve pressure testing method according to claim 2, characterized in that: The boosting assembly (200) comprises a support frame (201), a boosting pump (202) is mounted on the support frame (201), and the air outlet end of the boosting pump (200) is connected to an air outlet hose (203) via a distributor, and the outer ends of the air outlet hose (203) are respectively connected to the stainless steel pipe (107).

4. A clean, efficient and multifunctional valve pressure testing method according to claim 2, characterized in that: The bottom of the valve pressure test assembly (106) is connected to a pressure gauge (109) via an output hose.

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