Double chamber air cylinder airtightness detection device

Abstract

The utility model belongs to airtightness detection device technical field discloses a kind of double-cavity air cylinder airtightness detection device.Effectively solve the problem of low efficiency and low success rate of the airtightness of the middle partition of the double-cavity air cylinder currently detected.It includes fuselage, control unit and compressor, the bottom of fuselage is equipped with sealing inflation tool for sealing the lower end port of air cylinder and inflating air cylinder, the air inlet of sealing inflation tool is connected with the air outlet of compressor, the front side of fuselage is equipped with guide rail along the longitudinal direction of fuselage, the clamping tool for clamping air cylinder is slidably connected on guide rail, clamping tool, sealing inflation tool and compressor are connected with control unit.The utility model is simple to operate, can quickly detect the airtightness of the middle partition of double-cavity air cylinder, compared with the operation of sealing head first and then detecting airtightness in prior art, efficiency, success rate and pass rate are all higher.

Description

Technical Field

[0001] This utility model belongs to the technical field of airtightness testing devices, and particularly relates to an airtightness testing device for a dual-chamber air storage cylinder. Background Technology

[0002] The dual-chamber air reservoir is a key component of the braking system, providing a reliable air supply for vehicle braking and ensuring safe and stable braking during driving. The dual-chamber air reservoir integrates two chambers into a single cylinder, occupying less space and facilitating overall vehicle layout and space optimization, making it particularly suitable for compact vehicle designs. However, the intermediate partition, located inside the cylinder, is difficult to weld, making it prone to gas leakage. Current processes for testing the airtightness of the intermediate partition are cumbersome, inefficient, and have a low success rate. When the airtightness fails, the end cap must be removed before welding the intermediate partition for sealing. Therefore, a device is needed to quickly test the airtightness of the intermediate partition in a dual-chamber air reservoir. Utility Model Content

[0003] The purpose of this invention is to provide a device for testing the air tightness of a dual-chamber air storage cylinder, which effectively solves the problems of low efficiency and low success rate in testing the air tightness of the middle partition of a dual-chamber air storage cylinder.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a dual-chamber airtightness testing device for air storage cylinders, characterized in that it includes a body, a control unit, and a compressor. The bottom of the body is provided with a sealing and filling fixture for sealing the lower end port of the air storage cylinder and filling the air storage cylinder with air. The air inlet of the sealing and filling fixture is connected to the air outlet of the compressor. The front side of the body is provided with a guide rail along the longitudinal direction of the body. A clamping fixture for clamping the air storage cylinder is slidably connected on the guide rail. The clamping fixture, the sealing and filling fixture, and the compressor are all connected to the control unit.

[0005] Furthermore, the sealing and inflation fixture includes a sealing head for sealing the lower end port of the air storage cylinder, a first cylinder for controlling the tensioning and contraction of the sealing head, and a pressure detection device for detecting the pressing pressure of the sealing head and the internal pressure of the air storage cylinder. The air inlet of the sealing and inflation fixture is located on the sealing head, and the pressure detection device and the first cylinder are both connected to the control unit.

[0006] Furthermore, the clamping fixture includes a clamping member and a second cylinder for driving the clamping member to move up and down. The front end of the clamping member is annular, and the rear end of the clamping member is slidably connected to the guide rail. The output shaft of the second cylinder is connected to the top end of the clamping member, and the second cylinder is connected to the control unit.

[0007] Furthermore, the clamping member has a proximity switch at its front end, and the proximity switch is connected to the control unit.

[0008] Furthermore, protective railings are provided on both the left and right sides of the fuselage.

[0009] Furthermore, the dual-chamber airtightness testing device also includes a stainless steel water tank.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are:

[0011] (1) This utility model is simple to operate and can quickly test the air tightness of the middle partition of the double-chamber air storage cylinder. After the air tightness test is qualified, the end cap welding is carried out. Therefore, compared with the existing technology of sealing the end cap first and then testing the air tightness, the efficiency, success rate and qualification rate are all higher.

[0012] (2) By replacing the sealing and inflation tool, this utility model can be used to test the air tightness of the middle partition of a double-chamber air storage cylinder of various specifications (diameter 270mm~310mm, height 400mm~1000mm). Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a structural diagram of the combination of this utility model and a dual-chamber gas storage cylinder.

[0015] Explanation of reference numerals in the attached drawings: Body - 1; Control unit - 2; Air tank - 3; Sealing and inflation fixture - 4; Guide rail - 5; Clamping component - 6; Second cylinder - 7; Guardrail - 8; Stainless steel water tank - 9. Detailed Implementation

[0016] Example 1: A dual-chamber airtightness testing device for an airtight storage cylinder, such as... Figure 1 As shown, the device includes a roughly rectangular body 1, a control unit 2, and a compressor. The bottom of the body 1 is equipped with a sealing and filling fixture 4 for sealing the lower port of the air reservoir 3 and filling the air reservoir 3 with air. The air inlet of the sealing and filling fixture 4 is connected to the air outlet of the compressor. A guide rail 5 is provided along the longitudinal direction of the front side of the body 1. A clamping fixture for clamping the air reservoir 3 is slidably connected to the guide rail 5. The clamping fixture, the sealing and filling fixture 4, and the compressor are all connected to the control unit.

[0017] To improve the applicability of the testing device, in this embodiment, the sealing and inflation fixture 4 can be replaced according to the specifications of the dual-chamber air reservoir to be tested. The sealing and inflation fixture 4 includes a sealing head for sealing the lower end port of the air reservoir 3, a first cylinder for controlling the tensioning and contraction of the sealing head, and a pressure detection device for detecting the pressing pressure of the sealing head and the internal pressure of the air reservoir 3. The air inlet of the sealing and inflation fixture 4 is located on the sealing head, and the pressure detection device and the first cylinder are both connected to the control unit 2. When the lower end port of the dual-chamber air reservoir is placed on the sealing head, the control unit 2 controls the first cylinder to tighten, thereby tightening the sealing head and sealing the lower end port of the air reservoir 3. The pressure applied to the air reservoir 3 after the sealing head is tightened is detected by the pressure detection device. When the air reservoir 3 is pressurized to the set pressure, the pressure detection device monitors whether the pressure inside the air reservoir 3 changes within a certain period of time (3s). If the pressure inside the air reservoir 3 does not change, it indicates that the airtightness of the intermediate partition is qualified.

[0018] In this embodiment, the clamping fixture includes a clamping member 6 and a second cylinder 7 for driving the clamping member 6 to move up and down. The front end of the clamping member 6 is annular, and the rear end of the clamping member 6 is slidably connected to the guide rail 5. The output shaft of the second cylinder 7 is connected to the top end of the clamping member 6, and the second cylinder 7 is connected to the control unit 2. A proximity switch is provided at the front end of the clamping member 6, and the proximity switch is connected to the control unit 2. When the second cylinder 7 pushes the clamping member 6 downward until the proximity switch touches the air storage cylinder 3, the proximity switch transmits a signal to the control unit 2. The control unit 2 then controls the air passage connected to the second cylinder 7 to reduce the air pressure, thereby slowing down the downward movement of the clamping member 6 by the second cylinder 7 until it presses against the air storage cylinder 3.

[0019] In this embodiment, the end caps that come into contact with the gas storage cylinder 3 and the parts of the clamping member 6 that come into contact with the gas storage cylinder 3 are all made of high-hardness polytetrafluoroethylene material, which can better fit the gas storage cylinder 3, prevent the gas storage cylinder 3 from deforming or causing indentations, and prevent scratches on the surface of the gas storage cylinder 3.

[0020] In this embodiment, to prevent personnel from getting too close and causing injury during the testing process, protective railings 8 are installed on both the left and right sides of the machine body 1. Additionally, the dual-chamber air tank air tightness testing device provided in this embodiment also includes a stainless steel water tank 9. After the dual-chamber air tank passes the air tightness test, end caps are welded to both ends of the dual-chamber air tank body. Then, the welded joints of the end caps at both ends of the dual-chamber air tank body are ultrasonically cleaned using the stainless steel water tank 9 to remove oil stains and ensure a smooth finish after welding.

[0021] In this embodiment, the control unit 2 is controlled by a PLC, and corresponding switches or buttons are provided for the clamping, sealing, inflation, deflation, and releasing actions performed by the air tank 3. The machine body 1 adopts a welded structure and undergoes stress-relief annealing; after welding, the internal stress of some components must be eliminated; the stainless steel water tank 9, clamping fixture, sealing and inflation fixture 4, etc., should have sufficient strength.

[0022] The working principle of this utility model is as follows: Figure 2 As shown, (1) Place the lower end of the double-chamber air tank on the end cap, and control the first cylinder to tighten it through the control unit 2, thereby tightening the end cap and sealing the lower end of the air tank 3. (2) Control the second cylinder 7 through the control unit 2 to push the clamping part 6 downward to press the air tank 3. (3) Turn on the compressor through the control unit 2 to pressurize the air tank 3 to the set pressure. The pressure detection device monitors whether the pressure in the air tank 3 changes within a period of time (3s) after the set pressure is reached. If the pressure in the air tank 3 does not change, it means that the airtightness of the intermediate partition is qualified. (4) Control the clamping part 6 to move upward to leave the air tank 3 through the control unit 2. After controlling the end cap to shrink and the air tank 3 to vent, manually remove the air tank 3. (5) Weld the end caps to both ends of the double-chamber air tank body that has passed the airtightness test, and then use the stainless steel water tank 9 to ultrasonically clean the welded end caps at both ends of the double-chamber air tank body.

[0023] This invention is simple to operate and can quickly test the airtightness of the intermediate partition of a double-chamber air storage cylinder. After the airtightness test is passed, the end cap is welded. Therefore, compared with the existing technology of sealing the end cap first and then testing the airtightness, this invention has higher efficiency, success rate, and pass rate. By changing the sealing and inflation tooling, this invention can be applied to the airtightness testing of the intermediate partition of double-chamber air storage cylinders of various specifications (diameter 270mm~310mm, height 400mm~1000mm).

[0024] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A dual-chamber airtightness testing device for an airtight storage cylinder, characterized in that, The device includes a body, a control unit, and a compressor. The bottom of the body is provided with a sealing and filling fixture for sealing the lower end port of the air storage cylinder and filling the air storage cylinder. The air inlet of the sealing and filling fixture is connected to the air outlet of the compressor. The front side of the body is provided with a guide rail along the longitudinal direction of the body. A clamping fixture for clamping the air storage cylinder is slidably connected on the guide rail. The clamping fixture, the sealing and filling fixture, and the compressor are all connected to the control unit.

2. The dual-chamber airtightness testing device for an airtight storage cylinder according to claim 1, characterized in that, The sealing and inflation fixture includes a sealing head for sealing the lower end of the air storage cylinder, a first cylinder for controlling the tensioning and contraction of the sealing head, and a pressure detection device for detecting the pressing pressure of the sealing head and the internal pressure of the air storage cylinder. The air inlet of the sealing and inflation fixture is located on the sealing head, and the pressure detection device and the first cylinder are both connected to the control unit.

3. The dual-chamber airtightness testing device for an airtight storage cylinder according to claim 2, characterized in that, The clamping fixture includes a clamping element and a second cylinder for driving the clamping element to move up and down. The front end of the clamping element is annular, and the rear end of the clamping element is slidably connected to the guide rail. The output shaft of the second cylinder is connected to the top end of the clamping element, and the second cylinder is connected to the control unit.

4. The dual-chamber airtightness testing device for an airtight storage cylinder according to claim 3, characterized in that, The clamping member has a proximity switch at its front end, and the proximity switch is connected to the control unit.

5. The dual-chamber airtightness testing device for a gas storage cylinder according to claim 4, characterized in that, The fuselage is equipped with protective railings on both the left and right sides.

6. The dual-chamber airtightness testing device for an airtight storage cylinder according to claim 5, characterized in that, The dual-chamber airtightness testing device also includes a stainless steel water tank.

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