Multi-valve seat pressure test manifold and equipment
By designing a multi-valve seat pressure testing manifold and using threaded connections to achieve parallel pressure testing of multiple valves, the problem of existing equipment being expensive and having limited applicability is solved. This achieves low-cost, high-efficiency valve pressure testing, is applicable to valves of various specifications, and is easy to move.
Patent Information
- Application Number
- CN202520218829.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-12
AI Technical Summary
Existing valve seat pressure testing equipment is expensive, has limited applicability, cannot perform pressure testing on multiple valves simultaneously, and is bulky and inconvenient to move.
Design a multi-valve seat pressure testing manifold, which uses interconnected main and branch manifolds, and connects needle valves, short sections, elbows and high-pressure hoses through threaded connections to achieve parallel pressure testing of multiple valves, and uses monitoring valves to monitor the tightness.
It reduces equipment costs, improves pressure testing efficiency, is suitable for valves of various specifications, has a simple structure that is easy to move, reduces welding costs and time, and enhances the adaptability and reusability of the equipment.
Smart Images
Figure CN223841389U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of valve testing technology, and in particular relates to a multi-valve seat pressure testing manifold and equipment. Background Technology
[0002] Currently, valve seat pressure testing typically uses specialized valve pressure testing equipment. This testing method has the following disadvantages: 1. It is expensive; 2. It has high requirements for valve applicability, and many valves cannot be tested using a pressure testing bench; 3. The testing speed is slow, and a pressure testing bench can only test one valve at a time; 4. It is bulky and inconvenient to move.
[0003] Therefore, there is an urgent need to design a multi-valve seat pressure test manifold to solve the problems mentioned above. Utility Model Content
[0004] To address the technical problems mentioned in the background section regarding the high cost of existing valve pressure testing benches and the fact that a single test bench can only test one valve at a time, a multi-valve seat pressure testing manifold and device are provided to solve these problems.
[0005] To achieve the above objectives, the specific technical solution of this utility model for a multi-valve seat pressure testing manifold and equipment is as follows:
[0006] A multi-valve seat pressure test manifold includes a main pipeline and branch pipelines that are interconnected. The branch pipelines are connected to at least two test pipelines, which are arranged in parallel. Each test pipeline is equipped with a blind flange for matching with a test valve. A threaded hole is assumed to be present in the center of the blind flange. A vent valve is provided between the main pipeline and the branch pipeline.
[0007] Furthermore, the main pipeline, branch manifolds, and test pipelines all include needle valves and short sections, with pipe threads at both ends of the needle valves and short sections.
[0008] Furthermore, the needle valve's pipe thread is set to NPTM, and the short section's pipe thread is set to NPTF.
[0009] Furthermore, the main pipeline also includes a high-pressure hose, with one end of the high-pressure hose being set to NPTM and the other end to NPTF. The high-pressure hose is used to connect to the needle valve.
[0010] Furthermore, the main pipeline also includes a pressure gauge, which is installed on any short section of the main pipeline.
[0011] Furthermore, the branch manifold also includes elbows, which are used to connect the short sections of the branch manifold and the short sections of the test line.
[0012] Furthermore, the elbow includes a connecting part and a bending part, the bending part being bent at 90°, and the connecting part being used to connect the short section of the branch manifold and the short section of the test pipeline.
[0013] Furthermore, the pipe thread of the connection is set to NPTF.
[0014] Furthermore, the test pipeline also includes a monitoring valve, which is connected in parallel with the blind flange to monitor the airtightness of the test pipeline.
[0015] A multi-valve seat pressure testing device uses the aforementioned multi-valve seat pressure testing manifold.
[0016] This utility model of a multi-valve seat pressure testing manifold has the following advantages: its structure is simple and reasonable, requiring no welding, and installation is convenient, saving welding costs and time and eliminating the need for additional safety testing of the connection points; it is highly adaptable, suitable for valve seat pressure testing of any specification of valve, easy to move, and has no requirements for the surrounding environment; all components are selected and manufactured according to standards, ensuring safety and reliability; there is no welding work, and its high reusability reduces the amount of raw materials required; it can simultaneously meet the valve seat pressure testing needs of multiple valves, improving work efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the multi-valve seat pressure test manifold of this utility model;
[0018] Figure 2 This is a schematic diagram of the main pipeline of this utility model;
[0019] Figure 3 This is a schematic diagram of the branch manifold structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the test pipeline of this utility model.
[0021] Explanation of markings in the diagram:
[0022] 1. Needle valve; 2. Three-way valve; 3. Short section; 4. Elbow; 5. High-pressure hose; 6. Pressure gauge; 7. Vent valve; 8. Blind flange; 9. Monitoring valve; 10. Safety valve. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0024] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0025] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a multi-valve seat pressure testing manifold and equipment.
[0026] This embodiment provides a multi-valve seat pressure testing manifold, such as Figure 1 As shown, the multi-valve seat pressure testing manifold includes an interconnected main pipeline and branch pipelines. Each branch pipeline connects to at least two test pipelines, which are arranged in parallel. Each test pipeline is equipped with a blind flange 8 for matching the test valve. A threaded hole is assumed to be present in the center of the blind flange 8. A vent valve 7 is installed between the main pipeline and the branch pipeline. This multi-valve seat pressure testing manifold has a simple and reasonable structure, requires no welding, and is easy to install, saving welding costs and time and eliminating the need for additional safety testing of the connections. It is highly adaptable, suitable for seat pressure testing of valves of any specification, easy to move, and has no environmental requirements. All components are selected and manufactured according to standards, ensuring safety and reliability. The absence of welding operations and high reusability reduce raw material procurement. It can simultaneously meet the seat pressure testing needs of multiple valves, improving efficiency.
[0027] As a preferred embodiment, the aforementioned matching blind plate 8 is consistent with the specifications of the test valve, and an "NPS 1 / 2" NPTF threaded hole is opened in the center of the blind plate 8.
[0028] It should be noted that those skilled in the art will understand that the above-mentioned NPT thread is an American standard 60-degree tapered pipe thread, which is divided into general sealing cylindrical pipe thread and general sealing tapered pipe thread. The mating method is "taper / taper" mating and "cylinder / taper" mating. Furthermore, NPTM is an external thread and NPTF is an internal thread, and the two can be used together.
[0029] Furthermore, the main pipeline, branch manifolds, and test pipelines all include a needle valve 1 and a short section 3, with pipe threads provided at both ends of the needle valve 1 and the short section 3.
[0030] Furthermore, the pipe thread of needle valve 1 is set to NPTM, and the pipe thread of short section 3 is set to NPTF.
[0031] Specifically, in this embodiment, the wall thickness of the above-mentioned short section 3 is XXS, the size is "NPS 1 / 2", the length is 40mm, the size of the needle valve 1 is "NPS 1 / 2", and the pressure is 10000PSIG.
[0032] Furthermore, such as Figure 1 and Figure 2 As shown, the main pipeline also includes a high-pressure hose 5. One end of the high-pressure hose 5 is configured as NPTM and the other end as NPTF. The high-pressure hose 5 is used to connect to the needle valve 1.
[0033] Optionally, the main pipeline also includes a pressure gauge 6, which is installed on any short section 3 of the main pipeline.
[0034] Optionally, the main pipeline also includes a safety valve 10, which is installed on any section 3 of the main pipeline.
[0035] Furthermore, such as Figure 1 and Figure 3 As shown, the branch manifold also includes an elbow 4, which is used to connect the short section 3 of the branch manifold and the short section 3 of the test pipeline.
[0036] Specifically, such as Figures 1-4 The multi-valve seat pressure test manifold also includes a three-way valve 2. The three-way valve 2 can be installed on the main pipeline, branch pipeline, and test pipeline to provide new branches. For example, the pressure gauge 6 mentioned above can be connected to the short section 3 of the main pipeline through the three-way valve 2 to form a parallel structure and serve the purpose of testing pipeline pressure.
[0037] Furthermore, in this embodiment, such as Figures 1-4 As shown, those skilled in the art will understand that:
[0038] The main pipeline, starting from the upstream pump port, consists of the following components from upstream to downstream: high-pressure hose 5; needle valve 1; short section 3; three-way valve 2 and its branch pipe, which connects to short section 3, needle valve 1, and pressure gauge 6 in sequence; short section 3; three-way valve 2 and its branch pipe, which connects to short section 3 and needle valve 1 in sequence; short section 3; three-way valve 2 and its branch pipe, which connects to short section 3, needle valve 1, and safety valve 10 in sequence; short section 3; needle valve 1; short section 3.
[0039] The branch manifold is connected to the short section 3 via a three-way valve 2. The number of three-way valves 2 and short sections 3 can be adjusted by testing the number of valves in parallel as needed. The end of the manifold is an elbow 4.
[0040] The parallel test pipelines are identical in all of them. The components from upstream to downstream are as follows: high-pressure hose 5; short section 3; valve under test and matching blind flange 8; short section 3; needle valve 1; short section 3; three-way valve 2 and branch pipe, which are connected to short section 3 and needle valve 1 in sequence through the branch pipe; short section 3; needle valve 1.
[0041] In a preferred embodiment, the high-pressure hose 5, tee, short section 3, elbow 4 and needle valve 1 are all made of 316 stainless steel.
[0042] Furthermore, the elbow 4 includes a connecting part and a bending part, the bending part being bent at 90°, and the connecting part being used to connect the short section 3 of the branch manifold and the short section 3 of the test pipeline.
[0043] It should be noted that the elbow 4 is not necessary. In this embodiment, the side branch may not be able to reach the test pipeline due to insufficient pressure. Therefore, the elbow 4 is set to improve the flow.
[0044] Furthermore, the pipe thread of the connection is set to NPTF.
[0045] Furthermore, such as Figure 4 As shown, the test pipeline also includes a monitoring valve 9, which is connected in parallel with the blind plate 8 to monitor the airtightness of the test pipeline.
[0046] During valve pressure testing, close the vent valve 7 and keep all other valves open, including the valve under test. Slowly fill the system with water until water overflows from all leak detection valves. Close the valve under test and begin the pressure test. Once the valve test pressure is reached, maintain the pressure while counting the number of water droplets overflowing from the leak detection valves. After the pressure holding time is completed, compare the actual leakage with the leakage standard to determine whether the tested valve is qualified.
[0047] Furthermore, it should be noted that the cost of the multi-valve seat pressure testing manifold in this embodiment is far lower than that of a valve pressure testing bench. For example, the price of an existing high-precision, wide-pressure-range automated valve pressure testing bench can reach 100,000 to 200,000 yuan, while the material cost of this solution is only about 3,000 yuan, and even including installation and labor costs, it is only about 4,000 yuan. Traditional valve pressure testing benches have many limitations on valve specifications, while the multi-valve seat pressure testing manifold in this embodiment is applicable to almost all valves in the petrochemical field. The multi-valve seat pressure testing manifold in this embodiment can complete the pressure testing of multiple valves simultaneously, resulting in higher efficiency. The multi-valve seat pressure testing manifold in this embodiment is flexible in movement and can be used directly at the valve installation site for pressure testing.
[0048] This embodiment also provides a multi-valve seat pressure testing device, which uses the above-mentioned multi-valve seat pressure testing manifold, and its advantages are:
[0049] 1. Using a manifold to pressure test valves requires less space and can be done in restricted areas.
[0050] 2. All manifold connections use threaded connections, which greatly reduces costs;
[0051] 3. Multiple branches are led out through the three-way valve 2 and connected by hoses, allowing multiple valves to be pressure tested simultaneously, improving work efficiency. The flexibility of the hoses also allows for joint pressure testing even if the valves are relatively far apart.
[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A multi-valve seat pressure testing manifold, characterized in that, It includes interconnected main pipelines and branch manifolds, with each branch manifold connecting at least two test pipelines. The at least two test pipelines are arranged in parallel, and each test pipeline is equipped with a blind flange for matching with a test valve. It is assumed that there is a threaded hole in the center of the blind flange, and a vent valve is installed between the main pipeline and the branch manifold.
2. The multi-valve seat pressure test manifold according to claim 1, characterized in that, The main pipeline, branch manifolds, and test pipelines all include needle valves and short sections, with pipe threads at both ends of the needle valves and short sections.
3. The multi-valve seat pressure test manifold according to claim 2, characterized in that, The needle valve has an NPTM thread, while the short section has an NPTF thread.
4. The multi-valve seat pressure test manifold according to any one of claims 2 or 3, characterized in that, The main pipeline also includes a high-pressure hose, with one end of the high-pressure hose having an NPTM thread and the other end having an NPTF thread. The high-pressure hose is used to connect to the needle valve.
5. The multi-valve seat pressure test manifold according to claim 2, characterized in that, The main pipeline also includes a pressure gauge, which is installed on any short section of the main pipeline.
6. The multi-valve seat pressure test manifold according to claim 2, characterized in that, The branch manifold also includes elbows, which are used to connect the short sections of the branch manifold to the short sections of the test line.
7. The multi-valve seat pressure test manifold according to claim 6, characterized in that, The elbow includes a connecting part and a bending part. The bending part is bent at 90°, and the connecting part is used to connect the short section of the branch manifold and the short section of the test pipeline.
8. The multi-valve seat pressure test manifold according to claim 7, characterized in that, The pipe thread of the connection is set to NPTF.
9. The multi-valve seat pressure test manifold according to claim 1, characterized in that, The test pipeline also includes a monitoring valve, which is connected in parallel with the blind flange to monitor the tightness of the test pipeline.
10. A multi-valve seat pressure testing device, characterized in that, The multi-valve seat pressure test manifold as described in any one of claims 1-9 was used.