Butterfly valve waterless pressure test equipment

Abstract

The utility model discloses a butterfly valve water-free pressure test device, which belongs to the technical field of water-free pressure test devices and comprises a rack, a tool clamping structure is arranged on the left side of the upper end of the rack, and an operation panel is arranged on the right side of the upper end of the rack. A downward-pressing plugging structure is arranged above the tool clamping structure, a butterfly valve product is placed in the center of the tool clamping structure, and a handle opening structure used for opening the butterfly valve product is arranged on one side of the tool clamping structure. And a test gas circuit structure communicated with the butterfly valve product is arranged in the rack. The butterfly valve waterless pressure test equipment can independently perform airtightness test on the main seal and the shell of a butterfly valve product, is high in test precision, saves labor and tedious procedures, can store test data for production management, and has the advantages of reasonable design, convenience in use, high quality and high efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of waterless pressure testing equipment, and in particular to a butterfly valve waterless pressure testing equipment. Background Technology

[0002] Currently, the airtightness testing of butterfly valves mainly uses a self-made fixture. The lower chamber of the butterfly valve is sealed, and after the valve is closed, both the valve and the fixture are immersed in water. Air is continuously supplied to the valve, and the presence of bubbles is observed; this is the main seal airtightness test. Then, the butterfly valve is opened, both the upper and lower chambers are sealed using the fixture, and then immersed in water. Air is continuously supplied to the valve, and the presence of bubbles is observed again; this is the shell airtightness test. The entire testing process is cumbersome, requiring constant disassembly and reassembly of the sealing fixture, resulting in high labor intensity. Furthermore, the entire testing process relies on manual observation, making it impossible to guarantee product test results and leading to inconsistent product quality. Therefore, this utility model proposes a waterless pressure testing device for butterfly valves. Utility Model Content

[0003] The purpose of this invention is to provide a waterless pressure testing device for butterfly valves to solve the problems mentioned above.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a waterless pressure testing device for a butterfly valve, comprising a frame, a tooling clamping structure on the upper left side of the frame, and an operation panel on the upper right side of the frame; a downward pressure sealing structure is provided above the tooling clamping structure, a butterfly valve is placed at the center of the tooling clamping structure, and a handle opening structure for opening the butterfly valve is provided on one side of the tooling clamping structure; a test air circuit structure communicating with the butterfly valve is provided inside the frame.

[0006] Furthermore, the tooling clamping structure includes a worktable, a lower sealing tool is provided at the upper center of the worktable, grippers are symmetrically arranged on the left and right sides of the lower sealing tool, and a clamping cylinder is provided at the bottom of the grippers.

[0007] Furthermore, the pressure-sealing structure includes an L-shaped bracket, with a pressure cylinder at the upper end of the L-shaped bracket. The telescopic end of the pressure cylinder extends through the L-shaped bracket and is connected to a sealing cylinder. A sealing plate is provided at the lower end of the sealing cylinder, and the telescopic end of the sealing cylinder extends through the sealing plate and is connected to a plug.

[0008] Furthermore, the handle opening structure includes a handle opening fixture connected to the handle of the butterfly valve product, and a handle opening cylinder is provided at the lower end of the handle opening fixture.

[0009] Furthermore, the test gas path structure includes a sealed cavity structure, on one side of the upper end of the sealed cavity structure, a pressure transmitter is installed, the pressure transmitter is connected to a differential pressure transmitter via a pipeline, and the other end of the differential pressure transmitter is connected to the sealed cavity structure via a pipeline; an exhaust structure and a gas source are sequentially connected to the side wall of the sealed cavity structure via pipelines, and an intake solenoid valve is installed on the pipeline between the exhaust structure and the gas source.

[0010] Furthermore, the control panel includes alarm indicator lights, a touch screen, a pressure gauge, and a pressure regulating valve.

[0011] Furthermore, the workbench is equipped with a sealing cylinder that blocks the channels on both sides of the butterfly valve product.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] This utility model's waterless pressure testing equipment for butterfly valves can perform airtightness tests on the main seal and shell of butterfly valve products separately. It has high testing accuracy, saves labor and cumbersome procedures, and can store test data for production management. It has the advantages of reasonable design, convenient use, and high quality and efficiency. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the waterless pressure testing device for the butterfly valve of this utility model;

[0016] Figure 2 This is a schematic diagram of the downward pressure sealing structure;

[0017] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0018] Figure 4 This is a schematic diagram of the tooling clamping structure;

[0019] Figure 5 This is a schematic diagram of the handle opening mechanism;

[0020] Figure 6 This is a schematic diagram of the test gas path structure;

[0021] Figure 7 This is a schematic diagram of the control panel;

[0022] Figure 8 This is a flowchart illustrating the working process of the waterless pressure testing device for the butterfly valve of this utility model.

[0023] Explanation of reference numerals in the attached diagram: 1. Downward sealing structure; 2. Tooling clamping structure; 3. Operation panel; 4. Handle opening structure; 5. Test air circuit structure; 6. Frame; 7. Downward cylinder; 8. Sealing cylinder; 9. Sealing plate; 10. Plug; 11. Clamp; 12. Clamping cylinder; 13. Butterfly valve product; 14. Downward sealing tooling; 15. Handle opening tooling; 16. Handle opening cylinder; 17. Inlet solenoid valve; 18. Exhaust structure; 19. Sealing cavity structure; 20. Pressure transmitter; 21. Differential pressure transmitter; 22. Alarm indicator light; 23. Touch screen; 24. Pressure gauge and pressure regulating valve. Detailed Implementation

[0024] like Figure 1-8 As shown, a waterless pressure testing device for a butterfly valve includes a frame 6. A tooling clamping structure 2 is installed on the upper left side of the frame 6, and an operation panel 3 is installed on the upper right side of the frame 6. A downward pressure sealing structure 1 is installed above the tooling clamping structure 2. A butterfly valve product 13 is placed at the center of the tooling clamping structure 2. A handle opening structure 4 for opening the butterfly valve product 13 is installed on one side of the tooling clamping structure 2. A test air circuit structure 5 connected to the butterfly valve product 13 is installed inside the frame 6.

[0025] like Figure 4 As shown, the tooling clamping structure 2 includes a worktable. A lower sealing tooling 14 is installed at the upper center of the worktable. Clamping jaws 11 are symmetrically installed on the left and right sides of the lower sealing tooling 14. A clamping cylinder 12 is installed at the bottom of each clamping jaw 11. Specifically, each clamping jaw 11 includes a pressing component. A support component is hinged to the middle of the pressing component via a hinge shaft. One end of the pressing component is fixedly connected to the clamping cylinder 12, and the other end is in contact with the butterfly valve product 13. When the clamping cylinder 12 is activated, its telescopic end pushes one end of the pressing component upwards. Under the action of the hinge shaft, the other end moves downwards, thereby pressing the butterfly valve product 13 to achieve the clamping purpose. A sealing cylinder is installed on the worktable to seal the channels on both sides of the butterfly valve product 13, forming a temporary "sealing cavity" to apply pressure for leak detection.

[0026] like Figure 2 , 3 As shown, the downward sealing structure 1 includes an L-shaped bracket. A downward cylinder 7 is installed at the upper end of the L-shaped bracket. The telescopic end of the downward cylinder 7 passes through the L-shaped bracket and is connected to a sealing cylinder 8. A sealing plate 9 is installed at the lower end of the sealing cylinder 8. The telescopic end of the sealing cylinder 8 passes through the sealing plate 9 and is connected to a plug 10.

[0027] like Figure 5As shown, the handle opening structure 4 includes a handle opening fixture 15 connected to the handle of the butterfly valve product 13, and a handle opening cylinder 16 is installed at the lower end of the handle opening fixture 15.

[0028] like Figure 6 As shown, the test gas path structure 5 includes a sealed cavity structure 9. A pressure transmitter 20 is installed on one side of the upper end of the sealed cavity structure 9. The pressure transmitter 20 is connected to a differential pressure transmitter 21 via a pipeline. The other end of the differential pressure transmitter 21 is connected to the sealed cavity structure 19 via a pipeline. An exhaust structure 18 and a gas source are sequentially connected to the side wall of the sealed cavity structure 19 via pipelines. An intake solenoid valve 17 is installed on the pipeline between the exhaust structure 18 and the gas source.

[0029] like Figure 7 As shown, the operation panel 3 includes an alarm indicator light 22, a touch screen 23, a pressure gauge, and a pressure regulating valve 24. The control panel 3 also has functions such as test parameter adjustment, data storage, and alarm recording. This is a direct application of existing technology and will not be elaborated further here.

[0030] The operation process of this utility model is as follows:

[0031] Test the airtightness of the main seal of the butterfly valve:

[0032] First, place the closed butterfly valve product 13 on the lower sealing fixture 14. The lower pressure cylinder 7 drives the sealing cylinder 8 and the sealing plate 9 to press down the upper cavity of the butterfly valve product 13. Then, the fixture clamping structure 2 simultaneously operates to press and seal the sealing plate 9, the butterfly valve product 13 and the lower sealing fixture 14. In this state, the plug 10 is in an unsealed state, and the upper cavity of the butterfly valve product 13 is connected to the atmosphere. The air inlet solenoid valve 17 of the test air circuit structure 5 is opened, and the lower cavity of the butterfly valve product 13 begins to intake air. After the pressure in the lower cavity of the butterfly valve product 13 reaches the specified value, the air inlet solenoid valve 17 is closed. After the air pressure stabilizes, the sealing cylinder seals the high and low pressure cavities. The change in the pressure difference between the high and low pressure cavities is observed to determine whether there is a leak.

[0033] Test the airtightness of the butterfly valve body:

[0034] After the main sealing test is completed, the sealing cylinder 8 drives the plug 10 to seal the upper cavity of the butterfly valve product 13. The handle opening structure 4 slowly opens the handle of the butterfly valve product 13. At this time, the butterfly valve product 13 is in the open state. The air intake solenoid valve 17 of the test air circuit structure 5 is opened to start air intake. After reaching the specified pressure value, the air intake solenoid valve 17 is closed. After the air pressure stabilizes, the sealing cylinder seals the high and low pressure chambers. The pressure difference between the high and low pressure chambers is observed to determine whether there is a leak.

[0035] After the above tests are completed, based on the test results of the main seal and the housing, the corresponding alarm indicator 22 will start to flash and sound, the tooling clamping structure 2 will open, the pressing cylinder 7 will reset, and the test process will end.

[0036] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A waterless pressure testing device for butterfly valves, characterized in that: The device includes a frame (6), a tooling clamping structure (2) is provided on the upper left side of the frame (6), and an operation panel (3) is provided on the upper right side of the frame (6); a pressure sealing structure (1) is provided above the tooling clamping structure (2), a butterfly valve product (13) is placed at the center of the tooling clamping structure (2), and a handle opening structure (4) for opening the butterfly valve product (13) is provided on one side of the tooling clamping structure (2); a test air circuit structure (5) connected to the butterfly valve product (13) is provided inside the frame (6).

2. The butterfly valve waterless pressure testing device according to claim 1, characterized in that: The tooling clamping structure (2) includes a workbench, and a lower sealing tool (14) is provided at the upper center of the workbench. The lower sealing tool (14) is symmetrically provided with jaws (11) on the left and right sides, and a clamping cylinder (12) is provided at the bottom of the jaws (11).

3. The butterfly valve waterless pressure testing device according to claim 1, characterized in that: The pressure sealing structure (1) includes an L-shaped bracket, with a pressure cylinder (7) at the upper end of the L-shaped bracket. The telescopic end of the pressure cylinder (7) extends through the L-shaped bracket and is connected to a sealing cylinder (8). A sealing plate (9) is provided at the lower end of the sealing cylinder (8). The telescopic end of the sealing cylinder (8) extends through the sealing plate (9) and is connected to a plug (10).

4. The butterfly valve waterless pressure testing device according to claim 1, characterized in that: The handle opening structure (4) includes a handle opening fixture (15) connected to the handle of the butterfly valve product (13), and a handle opening cylinder (16) is provided at the lower end of the handle opening fixture (15).

5. The butterfly valve waterless pressure testing device according to claim 1, characterized in that: The test gas path structure (5) includes a sealed cavity structure (19). A pressure transmitter (20) is installed on one side of the upper end of the sealed cavity structure (19). The pressure transmitter (20) is connected to a differential pressure transmitter (21) through a pipeline. The other end of the differential pressure transmitter (21) is connected to the sealed cavity structure (19) through a pipeline. An exhaust structure (18) and a gas source are connected in sequence to the side wall of the sealed cavity structure (19) through a pipeline. An intake solenoid valve (17) is installed on the pipeline between the exhaust structure (18) and the gas source.

6. The butterfly valve waterless pressure testing device according to claim 1, characterized in that: The control panel (3) includes an alarm indicator (22), a touch screen (23), a pressure gauge, and a pressure regulating valve (24).

7. The butterfly valve waterless pressure testing device according to claim 2, characterized in that: The workbench is equipped with a sealing cylinder that blocks the channels on both sides of the butterfly valve product (13).

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