Movable air tightness test device

Abstract

A movable air tightness test device comprises a rack and an air supply pipeline fixed on the rack. The rack comprises a transverse plate and a panel erected at the upper end of the transverse plate, vertical auxiliary plates are fixed to the four corners of the bottom of the transverse plate respectively, and rollers are fixed to the bottom of each auxiliary plate; the gas supply pipeline is fixed on one side of the panel and comprises a gas supply main pipe and at least two gas supply branch pipes; one end of the air supply main pipe is connected with an air source, the other end of the air supply main pipe is connected with an air pipe connector, and a main overflow check valve and a pneumatic triple piece are sequentially arranged on the air supply main pipe in the air flowing direction. One end of the air supply branch pipe is connected with the air pipe joint, the other end of the air supply branch pipe is connected with the hose, and the air supply branch pipe is sequentially provided with the overflow check valve and the barometer in the air flowing direction; the other end of the hose is inserted into the pipe joint. The device can be flexibly applied to multi-point and multi-type airtightness detection tests of mechanical products under specific pressure and specific time.

Description

Technical Field

[0001] The utility model relates to an airtightness test tool, in particular to a movable airtightness test device for mechanical products. Background Art

[0002] In the machinery industry, there are many mechanical products that work in harsh environments and conditions. They must not release pressure under specific pressure and time conditions, so that they have a clamping function. Some mechanical products are used in oil and gas lubrication equipment. During use, there must be no air or oil leakage to avoid fire. When such mechanical products are used on the machine, each product must be tested for air leakage or pressure relief. There are many kinds of air tightness testing instruments for mechanical products, but most of them are fixed in position and inconvenient to move, not convenient and flexible to use, or limited in space, and low in work efficiency. It takes a lot of manpower, material resources and time to conduct air tightness testing. Summary of the invention

[0003] The purpose of the invention of the utility model is to solve the deficiencies of the above-mentioned prior art, thereby providing a movable air tightness testing device that can be flexibly used to perform multi-point and multi-type air tightness detection tests on mechanical products under specific pressure and specific time.

[0004] The technical solution of the utility model is: a movable air tightness test device, comprising a frame and an air supply pipeline fixed on the frame;

[0005] The frame includes a horizontal plate and a panel standing on the upper end of the horizontal plate, vertical auxiliary plates are respectively fixed at the four corners of the bottom of the horizontal plate, and a roller is fixed at the bottom of each auxiliary plate;

[0006] The gas supply pipeline is fixed on one side of the panel, and the gas supply pipeline includes a gas supply main pipe and at least two gas supply branches;

[0007] One end of the gas supply main pipe is connected to the gas source, and the other end is connected to the gas pipe joint. A total overflow check valve and a pneumatic triplet are arranged in sequence on the gas supply main pipe along the gas flow direction;

[0008] One end of the gas supply branch pipe is connected to the gas pipe joint, and the other end is connected to the hose. The gas supply branch pipe is provided with a overflow check valve and a pressure gauge in sequence along the gas flow direction;

[0009] The other end of the hose is inserted into the pipe joint.

[0010] The pipe joint is fixed on the piece to be tested.

[0011] A plurality of reinforcing plates are arranged between the two side surfaces of the panel and the transverse plate.

[0012] A through hole is provided at the bottom of the auxiliary plate, one end of the connecting shaft is fixed in the center hole of the roller, and the other end of the connecting shaft is provided with a radial through hole. After the other end of the connecting shaft passes through the through hole, a fastener is installed in the radial through hole to fix it.

[0013] The roller is equipped with a foot brake.

[0014] The panel is provided with three gas supply branches.

[0015] An alarm device is also installed on one side of the pressure gauge of the branch pipe.

[0016] The advantages of the utility model are: the test device is cleverly designed, easy to operate, and convenient to clamp. It can be moved to any place at any time and locked to perform pressure test on mechanical products. It can also perform single or multiple simulated working condition tests on multiple mechanical products at the same time, with high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a left view of the utility model;

[0019] In the figure: 1, foundation, 2, roller, 3, foot brake, 4, cross plate, 5, reinforcement plate, 6, panel, 7, main check valve, 8, pneumatic triplex, 9, air pipe joint, 10, sub-check valve, 11, pressure gauge, 12, alarm device, 13, hose, 14, test piece a, 15, pipe joint, 16 test piece b, 17, auxiliary plate, 17-1, through hole, 18, fastener. DETAILED DESCRIPTION

[0020] Figure 1 , Figure 2 In the figure, the frame is welded by a panel 6, an auxiliary plate 17, a reinforcing plate 5, and a cross plate 4; the four rollers 2 are symmetrical in pairs, respectively installed in the through holes 17-1 of the auxiliary plate 17, and locked with fasteners 18; the four rollers 2 can rotate flexibly, support and drive the frame to move to the required position on the foundation 1, and lock it to the appropriate position with a foot brake 3; the air supply pipeline is fixed on one side of the panel 6, one end of the air supply main pipe is connected to the air source, and the other end is connected to one end of the four-way joint, and the other three ports of the four-way joint are respectively connected to a gas supply branch pipe, and a total overflow check valve 7 and a pneumatic triplet 8 are sequentially arranged on the gas supply main pipe along the gas flow direction, and a sub-overflow check valve 10, a pressure gauge 11 and an alarm device 12 are sequentially arranged on the gas supply branch pipe along the gas flow direction, and a hose 13 and a corresponding pipe joint 15 are respectively used to connect and clamp the test piece a14 and the test piece b16 with the two branch pipes.

[0021] Figure 1In the embodiment, three different types of test pieces can be tested at the same time. By connecting more joints, multiple different types of test pieces can be tested simultaneously as needed, such as test piece a14 and test piece b16. The same type of test piece b16 can be assembled and tested simultaneously under simulated working conditions. When the test pressure exceeds the pressure range, the alarm device 12 will alarm; when the test time reaches the set time, the alarm device 12 will prompt. This is a prior art and will not be described in detail in this embodiment.

[0022] During operation, compressed air is input into the main check valve 7, filtered for moisture and impurities through the pneumatic triplet 8, and enters the four-way joint 9. The four-way joint 9 simultaneously outputs the compressed air to three parallel sub-check valves 10, and then passes through the pressure gauge 11, the alarm device 12, the hose 13 and the pipe joint 15 to connect to the test piece b16 or the test piece a14.

[0023] Test steps:

[0024] 1. Push the movable air tightness test device to the working position and lock the foot brake 3;

[0025] 2. Press Figure 1 Connect the test piece b16 to the sealing test device through the pipe joint 15. Adjust the pressure gauge 11 to the pressure range required by the test, generally 2.5MPa~3MPa;

[0026] 3. Set the alarm device 12;

[0027] 4. Open the main overflow check valve 7 and input compressed air;

[0028] 5. Use bubble water to check whether there is gas discharged from the sealing joint of test piece b16 or test piece a14;

[0029] 6. If there is no gas discharge, close the overflow check valve 10 to form a pressure-maintaining space;

[0030] 7. The timer starts timing. Within the specified time, usually 5 to 10 minutes, observe whether the pressure value of the barometer 11 is always within the valid range;

[0031] 8. If there is no abnormal change in the pressure value of the pressure gauge 11 within the specified time, loosen the pipe joint 15 to complete the pressure holding test;

[0032] 9. Judgment: The pressure holding test of test piece b16 or test piece a14 passed.

[0033] In the above test steps: in step 7, if the pressure value of the barometer 11 changes abnormally and the alarm device 12 sounds, it is determined that the pressure holding test of the test piece b16 or the test piece a14 fails. It is necessary to find out the cause and perform the above test again until the test meets the requirements.

[0034] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable air tightness test device, characterized in that: It includes a rack machine and an air supply pipeline fixed on the rack; The frame comprises a horizontal plate (4) and a panel (6) standing on the upper end of the horizontal plate (4); vertical auxiliary plates (17) are respectively fixed at the four corners of the bottom of the horizontal plate (4); and a roller (2) is fixed at the bottom of each auxiliary plate (17); The gas supply pipeline is fixed on one side of the panel (6), and the gas supply pipeline comprises a gas supply main pipe and at least two gas supply branch pipes; One end of the gas supply main pipe is connected to the gas source, and the other end is connected to the gas pipe joint (9). A total overflow check valve (7) and a pneumatic triplet (8) are arranged in sequence on the gas supply main pipe along the gas flow direction; One end of the gas supply branch pipe is connected to the gas pipe joint (9), and the other end is connected to the hose (13); a overflow check valve (10) and a pressure gauge (11) are sequentially arranged on the gas supply branch pipe along the gas flow direction; The other end of the hose (13) is inserted into the pipe joint (15).

2. A portable air tightness test device according to claim 1, characterized in that: The pipe joint (15) is fixed on the piece to be tested.

3. A portable air tightness test device according to claim 1, characterized in that: A plurality of reinforcing plates (5) are provided between the two side surfaces of the panel (6) and the transverse plate (4).

4. A portable air tightness test device according to claim 1, characterized in that: The bottom of the auxiliary plate (17) is provided with a through hole (17-1), one end of the connecting shaft is fixed in the center hole of the roller (2), the other end of the connecting shaft is provided with a radial through hole, and after the other end of the connecting shaft passes through the through hole (17-1), a fastener (18) is installed in the radial through hole to fix it.

5. A portable air tightness test device according to claim 1 or 4, characterized in that: The roller (2) is provided with a foot brake.

6. The portable air tightness test device according to claim 1, characterized in that: The panel (6) is provided with three gas supply branches.

7. The portable air tightness test device according to claim 1, characterized in that: An alarm device (12) is also provided on one side of the air pressure gauge (11) without a branch pipe.

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