A butterfly valve plate airtightness testing fixture

Abstract

This utility model discloses a butterfly valve plate airtightness testing fixture, including a support frame. The support frame includes a main support channel steel running the entire length of the main support channel steel, and side support channel steels symmetrically and vertically arranged on both sides of the middle of the main support channel steel. The openings of the main support channel steel and the side support channel steel face upwards. Fixed blocks are fixedly installed in the openings at both ends of the main support channel steel. A movable frame is installed inside the main support channel steel and inside the fixed blocks. The movable frame includes a movable block, the side of which is confined to the inside of the main support channel steel. A support plate is installed on the top of the movable block. The support plate has an upward-opening U-shaped groove in the middle. A long screw rod running along the length of the main support channel steel is rotatably connected inside the fixed blocks. A handwheel is installed at the outer end of the long screw rod, and the inner threaded section of the long screw rod is threadedly connected to the movable block. By completing the valve plate airtightness testing before assembly, production quality is moved forward, effectively reducing subsequent rework and disassembly, and improving overall production efficiency and product qualification rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of butterfly valve plate testing, and specifically relates to a butterfly valve plate airtightness testing fixture. Background Technology

[0002] As a commonly used fluid control device, the airtightness of the butterfly valve plate directly affects its sealing performance and service life. In traditional production processes, the airtightness of the butterfly valve plate is usually tested after the valve is assembled into a complete unit using specialized pressure testing equipment. When airtightness defects are found in the valve plate, not only are high-value components such as the installed stainless steel valve stem and sealing rings scrapped, increasing production costs, but also a large amount of rework and disassembly is required, affecting production efficiency.

[0003] Furthermore, the lack of a process for separately inspecting valve plates before assembly makes it impossible to promptly screen out defective valve plates before assembly, leading to high difficulty and significant waste in subsequent rework. Therefore, there is an urgent need to develop a tooling device capable of independently inspecting the airtightness of butterfly valve plates during the blanking or machining stage, in order to improve inspection efficiency, reduce assembly losses, and achieve early control over the airtightness quality of valve plates. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a tooling for testing the airtightness of a butterfly valve plate.

[0005] The technical solution adopted by this utility model is a butterfly valve plate airtightness testing fixture, including a support frame. The support frame includes a main support channel steel that runs the length of the main support channel steel. Side support channel steels are symmetrically and vertically arranged on both sides of the middle of the main support channel steel. The openings of the main support channel steel and the side support channel steel face upward. Fixed blocks are fixedly installed in the openings at both ends of the main support channel steel. A movable frame is set inside the main support channel steel and inside the fixed blocks. The movable frame includes a movable block. The side of the movable block is restricted to the inside of the main support channel steel. A support plate is set on the top of the movable block. The middle of the support plate has an upward-opening U-shaped groove. A long screw rod arranged along the length of the main support channel steel is rotatably connected inside the fixed block. A handwheel is set at the outer end of the long screw rod. The inner threaded section of the long screw rod is threadedly connected to the movable block. The convex surface of the butterfly valve plate is placed on the support frame with its surface facing downward. The shaft holes on both sides of the butterfly valve plate face the movable frames on both sides. A plug is set in the shaft hole. The rear end of the plug abuts against the inside of the support plate. A connector is set in the center of the plug. The connector is stuck in the U-shaped groove for connecting an air pipe.

[0006] Furthermore, a pressure plate is installed on the butterfly valve plate, which is located directly above the side support channel steel. Both ends of the pressure plate are fixed to the side support channel steel on both sides by a continuous threaded rod and a nut.

[0007] Furthermore, the side of the movable block abuts against the inner side of the main support channel steel.

[0008] Furthermore, reinforcing ribs are symmetrically arranged on both sides behind the support plate on the movable block.

[0009] The butterfly valve plate airtightness testing fixture provided by this utility model has the following advantages compared with the prior art:

[0010] 1. This fixture allows for direct airtightness testing of butterfly valve plates during the blanking or machining stage, identifying leakage defects in advance and preventing problems from being discovered after assembly. This reduces losses from scrapping high-value components such as stainless steel shafts and seals due to defective valve plates. By completing the valve plate airtightness test before assembly, production quality is shifted upstream, effectively reducing subsequent rework and disassembly, and improving overall production efficiency and product qualification rate.

[0011] 2. The tooling has a compact structure, mainly consisting of a support frame, movable frame, plug, pressure plate, and air connection system. Installation and use are simple and quick, facilitating rapid on-site testing. The movable frame and adjustable long screw structure allow for flexible adaptation to butterfly valve plates of different sizes, meeting the common testing needs of multiple product specifications, improving tooling versatility, and saving manufacturing costs and storage space. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the movable frame of this utility model;

[0014] Figure 3 This is a schematic diagram illustrating the use of this utility model.

[0015] In the diagram: 1. Main support channel steel; 2. Side support channel steel; 3. Fixed block; 4. Movable frame; 41. Movable block; 42. Support plate; 43. U-shaped channel; 44. Reinforcing rib plate; 5. Long screw; 6. Handwheel; 7. Plug; 71. Connector; 8. Pressure plate; 9. Continuous screw; 10. Butterfly valve plate. Detailed Implementation

[0016] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed description of a butterfly valve plate airtightness testing fixture of this utility model.

[0017] like Figure 1 and Figure 2As shown, a butterfly valve plate airtightness testing fixture includes a support frame, which includes a main support channel steel 1 running the length of the main support channel steel 1. Side support channel steels 2 are symmetrically and vertically arranged on both sides of the middle of the main support channel steel 1. The openings of the main support channel steel 1 and the side support channel steels 2 face upwards. Fixing blocks 3 are fixedly installed inside the openings at both ends of the main support channel steel 1. A movable frame 4 is installed inside the main support channel steel 1, inside the fixing blocks 3. The movable frame 4 includes a movable block 41, the side of which is confined to the inside of the main support channel steel 1. A support plate 42 is installed on the top of the movable block 41. The middle of the support plate 42 has an upward-opening U-shaped groove 43. The fixture rotatably connects the main support channel steel within the fixing blocks 41. A long screw 5 is arranged along its length. The outer section of the long screw 5 is a smooth section. The fixing block 41 has a through hole, and the smooth section is fitted into the through hole. A limiting sleeve is provided on the smooth section in the direction of the fixing block 41. The limiting sleeve is fixed to the smooth section by a pin. A handwheel 6 is provided at the outer end of the long screw 5. The inner threaded section of the long screw 5 is threadedly connected to the movable block 41. The convex surface of the butterfly valve plate 10 is placed on the support frame with its convex surface facing down. The two shaft holes on both sides of the butterfly valve plate 10 face the two movable frames 4 respectively. A plug 7 is provided in the shaft hole. The rear end of the plug 7 abuts against the inner side of the support plate 42. A connector 71 is provided at the center of the plug 7. The connector 71 is stuck in the U-shaped groove 43 for connecting the air pipe.

[0018] In this embodiment, reinforcing ribs 44 are symmetrically arranged on both sides behind the support plate 42 on the movable block 41. The side of the movable block 41 abuts against the inner side of the main support channel steel 1 to prevent the movable frame 4 from rotating with the long screw 5.

[0019] A pressure plate 8 is provided on the butterfly valve plate 10. The pressure plate 8 is located directly above the side support channel steel 2. Both ends of the pressure plate 8 are fixed to the side support channel steel 2 on both sides by a continuous threaded rod 9 and a nut.

[0020] like Figure 3 As shown, during use, the butterfly valve plate airtightness testing fixture is placed on a flat and stable operating table. The butterfly valve plate 10 to be tested is placed steadily on the support frame with its convex surface facing down, so that the shaft holes at both ends of the butterfly valve plate 10 are aligned with the movable brackets 4 on both sides of the support frame. Plugs 7 are inserted into the shaft holes on both sides of the butterfly valve plate 10, ensuring that the connector 71 at the center of the plug 7 is aligned with the U-shaped groove 43 of the support plate 42. The handwheels 6 at both ends are rotated, driving the long screw 5 to drive the movable block 41 forward until the rear end of the plug 7 is tightly abutted against the inner side of the support plate 42, and the plugs 7 on both sides fit tightly with the shaft holes without any looseness or gaps, ensuring the airtightness of the test.

[0021] Place the pressure plate 8 on the upper surface of the butterfly valve plate 10, aligning the two ends of the pressure plate 8 with the side support channel steel 2 on both sides. Secure the pressure plate 8 to the side support channel steel 2 using the through screw 9 and nut to ensure that the butterfly valve plate 10 remains stable during the testing process.

[0022] Connect the gas supply line to connector 71 on plug 7. Confirm that the gas supply pressure, pressure regulating valve, and test gauge settings meet the testing process requirements. Slowly turn on the gas supply and apply the specified test pressure to the inner cavity of the butterfly valve plate 10. Maintain a stable pressure and observe the pressure gauge reading and whether there is any leakage in the test area. If the pressure gauge reading is stable and there is no leakage during the test, the valve plate is deemed to be airtight. If the pressure gauge reading drops or air bubbles appear in the test area, the valve plate is deemed to have a leakage defect and should be repaired or scrapped.

[0023] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A butterfly valve disc air tightness detection tool, characterized in that, The system includes a support frame, which includes a main support channel steel (1) that runs the length of the main support channel steel (1). Side support channel steels (2) are symmetrically and vertically arranged on both sides of the middle of the main support channel steel (1). The openings of the main support channel steel (1) and the side support channel steels (2) face upwards. Fixing blocks (3) are fixedly installed inside the openings at both ends of the main support channel steel (1). A movable frame (4) is installed inside the main support channel steel (1) on the inside of the fixing blocks (3). The movable frame (4) includes a movable block (41). The side of the movable block (41) is restricted to the inside of the main support channel steel (1). A support plate (42) is installed on the top of the movable block (41). The middle of the support plate (42) is provided with... The U-shaped groove (43) with an upward opening is connected to a long screw (5) that is rotatably connected to the fixed block (41) along the length of the main support channel steel (1). A handwheel (6) is provided at the outer end of the long screw (5). The inner threaded section of the long screw (5) is threaded to the movable block (41). The convex surface of the butterfly valve plate (10) is placed on the support frame with its convex surface facing down. Plugs (7) are provided in the shaft holes on both sides of the butterfly valve plate (10) and face the movable frames on both sides respectively. The rear end of the plug (7) abuts against the inner side of the support plate (42). A connector (71) is provided in the center of the plug (7). The connector (71) is stuck in the U-shaped groove (43) for connecting the air pipe.

2. The butterfly valve disc air tightness detection tooling of claim 1, wherein, A pressure plate (8) is provided on the butterfly valve plate (10). The pressure plate (8) is located directly above the side support channel steel (2). The two ends of the pressure plate (8) are fixed to the side support channel steel (2) on both sides by a continuous screw (9) and a nut.

3. The butterfly valve disc air tightness detection tooling of claim 1, wherein, The side of the movable block (41) abuts against the inside of the main support channel steel (1).

4. The butterfly valve plate air tightness detection tool according to any one of claims 1-3, characterized in that, Reinforcing ribs (44) are symmetrically arranged on both sides behind the support plate (42) on the movable block (41).

Images