A fixture for testing leakage in automotive valve bodies

Abstract

This utility model relates to the field of automotive valve body leakage testing technology, specifically a fixture for automotive valve body leakage testing, including a water tank. A detection mechanism is rotatably mounted on the water tank, and a long rod is fixed to the end of the detection mechanism. A sealing mechanism is fixed to the long rod, and the sealing mechanism includes a base plate and a rotating rod. The end of the long rod is bolted to the base plate, and a stop block is fixed to the base plate. A washer is engaged on the stop block. A rotating rod is rotatably mounted on the base plate, and a sliding rod is threaded onto the rotating rod. A locking rod is fixedly mounted on the sliding rod, and a stop rod abuts against the locking rod. Two support blocks are symmetrically fixed to the stop block, and the stop rod is rotatably connected to the support blocks. The top of the stop rod abuts against the washer. The linkage structure of the rotating rod, sliding rod, and stop rod allows the stop rod to apply uniform and adjustable pressure to the washer, ensuring that the washer fits tightly against the valve body end, avoiding the sealing failure caused by the washer easily lifting or shifting in traditional fixtures.

Description

Technical Field

[0001] This utility model relates to a fixture, specifically a fixture for testing automotive valve body leakage, and belongs to the field of automotive valve body leakage testing technology. Background Technology

[0002] The valve body is a key component in many automotive systems used to control fluids. By altering the oil and gas passages within the valve body, it achieves precise control over the flow direction, flow rate, and pressure of fluids, ensuring the stable operation of various automotive systems. During a leak test on the valve body, it is immersed in liquid and pressurized with gas. If there is a leak, bubbles will emerge.

[0003] In existing fixtures, the gaskets used to seal the valve body end are usually placed directly on the contact surface and fixed by simple mechanical compression. This can easily lead to uneven force on the gaskets. During the test, due to factors such as valve body installation misalignment and inflation pressure fluctuations, the gaskets may lift, shift, or partially detach from the sealing surface, causing the test gas to leak from the interface gap, resulting in false leaks and affecting the test results. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for testing automotive valve body leakage in order to solve the above-mentioned problems. The linkage structure of the rotating rod, sliding rod, and push rod allows the push rod to apply uniform and adjustable pressure to the gasket, ensuring that the gasket fits tightly against the end of the valve body and avoiding the sealing failure caused by the gasket easily lifting or shifting in traditional fixtures.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a fixture for testing automotive valve body leakage includes a water tank, a detection mechanism rotatably mounted on the water tank, a long rod fixed to the end of the detection mechanism, a sealing mechanism fixed to the long rod, the sealing mechanism including a base plate and a rotating rod, the base plate being fixedly mounted to the end of the long rod by bolts, a stop block being fixedly connected to the base plate, a washer being engaged on the stop block, a rotating rod rotatably connected to the base plate, a sliding rod being threadedly connected to the rotating rod, a locking rod being fixedly mounted on the sliding rod, a stop rod abutting against the locking rod, two support blocks being symmetrically fixedly connected to the stop block, the stop rod being rotatably connected to the support blocks, and the top end of the stop rod abutting against the washer.

[0006] Preferably, the end of the abutment block away from the bottom plate is provided with a slot, and a washer is engaged in the slot. The part where the washer engages with the abutment block is rectangular in structure.

[0007] Preferably, the sealing mechanism further includes a groove, and the end of the abutment near the slide bar is provided with a groove, which is inclined.

[0008] Preferably, the locking rod is located in the slide groove, and the diameter of the locking rod is equal to the width of the slide groove.

[0009] Preferably, the end of the rotating rod away from the abutment block is configured with a regular hexagonal structure, and the sliding rod is slidably connected to the base plate.

[0010] Preferably, the detection mechanism includes a rotating shaft and a bracket. The rotating shaft is rotatably installed inside the water tank, and two brackets are fixedly connected to the rotating shaft. A support plate is fixedly connected to the end of each bracket, and the support plate is connected to a fixed plate via a connecting rod.

[0011] Preferably, the detection mechanism further includes a hydraulic rod, which is fixedly installed between the support plate and the fixing plate, and the telescopic end of the hydraulic rod is fixedly connected to a clamping plate.

[0012] Preferably, the fixing plate is fixedly connected to the long rod by bolts, and the long rod passes through the inner wall of the fixing plate and the base plate.

[0013] The beneficial effects of this utility model are as follows: Through the linkage structure of the rotating rod, sliding rod, and abutment rod, and utilizing the principles of threaded transmission and lever, the abutment rod applies uniform and adjustable pressure to the washer, ensuring that the washer fits tightly against the end of the valve body. This avoids the sealing failure caused by the washer easily lifting or shifting in traditional fixtures, thus reducing false leakage during testing from the root cause. The rotating rod end is equipped with a regular hexagonal structure, which can be quickly rotated with a tool to drive the sliding rod and abutment rod to automatically press the washer, eliminating the need for repeated manual adjustments and shortening the clamping time. The sliding fit between the sliding rod and the base plate ensures smooth transmission and reduces the difficulty of operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the long rod and the base plate of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the hydraulic rod and the clamping plate of this utility model;

[0017] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 5 This is a schematic diagram of the connection structure between the abutment and the support block of this utility model;

[0019] Figure 6 This is a schematic diagram of the connection structure between the abutment and the washer of this utility model.

[0020] In the diagram: 1. Water tank; 2. Detection mechanism; 201. Rotating shaft; 202. Bracket; 203. Support plate; 204. Connecting rod; 205. Fixing plate; 206. Hydraulic rod; 207. Clamping plate; 3. Long rod; 4. Sealing mechanism; 401. Base plate; 402. Rotating rod; 403. Sliding rod; 404. Clamping rod; 405. Abutting rod; 406. Slide groove; 407. Support block; 5. Abutting block; 6. Washer; 7. Slot. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-6 As shown, a fixture for testing automotive valve body leakage includes a water tank 1. A detection mechanism 2 is rotatably mounted on the water tank 1. A long rod 3 is fixed to the end of the detection mechanism 2. A sealing mechanism 4 is fixed to the long rod 3. The sealing mechanism 4 includes a base plate 401 and a rotating rod 402. The base plate 401 is bolted to the end of the long rod 3. A stop block 5 is fixedly connected to the base plate 401. A washer 6 is engaged with the stop block 5. A rotating rod 402 is rotatably connected to the base plate 401. The end of the rotating rod 402 away from the stop block 5 is hexagonal. A sliding rod 403 is threadedly connected to the rotating rod 402. The sliding rod 403 is slidably connected to the base plate 401. A locking rod 404 is fixedly mounted on the sliding rod 403. A stop rod 405 abuts against the locking rod 404. Two support blocks 407 are symmetrically fixedly connected to the abutment block 5. The abutment rod 405 is rotatably connected to the support blocks 407. The top end of the abutment rod 405 abuts against the washer 6. The rotating rod 402 drives the sliding rod 403 to slide along the inner wall of the base plate 401. The locking rod 404 on the sliding rod 403 is embedded in the sliding groove 406 provided in the abutment rod 405, pushing the abutment rod 405 to rotate with the support block 407 as the fulcrum. Its top end applies uniform pressure to the washer 6, so that the washer 6 fits tightly against the end of the valve body and the side wall of the abutment block 5, which not only completes the seal but also ensures that the washer 6 does not warp or have gaps. The end of the abutment rod 405 near the sliding rod 403 is provided with a sliding groove 406. The sliding groove 406 is inclined. The locking rod 404 is located in the sliding groove 406, and the diameter of the locking rod 404 is equal to the width of the sliding groove 406.

[0023] As a technical optimization of this utility model, the end of the abutment 5 away from the base plate 401 is provided with a slot 7, and a washer 6 is engaged in the slot 7. The part where the washer 6 engages with the abutment 5 is rectangular in structure. According to the model of the automobile valve body to be tested, a suitable washer 6 is selected and inserted into the slot 7 at the end of the abutment 5. The rectangular engaging part of the washer 6 and the slot 7 must be completely matched to prevent lateral displacement.

[0024] As a technical optimization of this utility model, the detection mechanism 2 includes a rotating shaft 201 and a bracket 202. The rotating shaft 201 is rotatably installed inside the water tank 1. Two brackets 202 are fixedly connected to the rotating shaft 201. A support plate 203 is fixedly connected to the end of the bracket 202. The rotating shaft 201 drives the bracket 202 and the valve body to be immersed in the water in the water tank 1. Observe whether there are leakage bubbles generated on the surface of the valve body and at the connection. At the same time, record the pressure value, pressure holding time and leakage situation. The support plate 203 is connected to the fixed plate 205 through the connecting rod 204. A hydraulic rod 206 is fixedly installed between the support plate 203 and the fixed plate 205. A clamp 207 is fixedly connected to the telescopic end of the hydraulic rod 206. The fixed plate 205 is fixedly connected to the long rod 3 through bolts. The long rod 3 penetrates the inner wall of the fixed plate 205 and the bottom plate 401.

[0025] In use, firstly, ensure that the water tank 1 has sufficient water to completely submerge the valve body to be tested. Then, select a suitable washer 6 according to the model of the automotive valve body to be tested and insert it into the groove 7 at the end of the abutment block 5. The rectangular engagement part of the washer 6 and the groove 7 must be perfectly matched to prevent lateral displacement. Then, install the long rod 3 on the fixing plate 205 with bolts, ensuring that the long rod 3 penetrates through the fixing plate 205 and the inner wall of the base plate 401 to fix the base plate 401. Finally, use a wrench to rotate the rotating rod 4 installed on the base plate 401. 02. The end of the rotating rod 402 is a regular hexagon, which facilitates the application of force. The rotating rod 402 drives the sliding rod 403, which is threaded to it, to slide along the inner wall of the base plate 401. The locking rod 404 on the sliding rod 403 is embedded in the sliding groove 406 provided in the abutment rod 405, pushing the abutment rod 405 to rotate around the support block 407 as the fulcrum. Its top end applies uniform pressure to the washer 6, so that the washer 6 fits tightly against the end of the valve body and the side wall of the abutment block 5, which not only completes the seal but also ensures that the washer 6 does not lift or have gaps. Align the two ends of the automotive valve body to be tested with the clamping plate 207 and the abutment block 5 respectively. The valve body end is brought into contact with the gasket 6. Then, the hydraulic rod 206 is activated, causing its telescopic end to push the clamp 207 towards the valve body until the clamp 207 tightly clamps the other end of the valve body, ensuring no displacement of the valve body during the test. An air filling device is connected through the internal channel of the clamp 207 to fill the valve body and connecting pipes with air or nitrogen, gradually increasing the system pressure to the specified airtightness test pressure. This pressure is maintained for a period of time according to the test standard. Then, the motor switch installed in the water tank 1 is turned on, causing the motor output shaft to drive the rotating shaft 201 in the water tank. 1. Rotate the shaft 201 to immerse the bracket 202 and valve body in the water tank 1. Observe whether there are any leaking bubbles on the surface and connection of the valve body. At the same time, record the pressure value, holding time and leakage situation. After the test is completed, slowly release the internal pressure of the valve body to normal pressure to avoid damage to the valve body or fixture caused by sudden pressure drop. Control the hydraulic rod 206 to retract and the clamp 207 to release the valve body, so that the tested valve body can be taken out. When the rotating rod 402 is rotated in the opposite direction, the slide rod 403 is reset and the abutment rod 405 releases the washer 6, so that the washer 6 can be disassembled and replaced.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A jig for testing a valve body of an automobile for leakage, comprising a water tank (1), characterized in that: A detection mechanism (2) is rotatably mounted on the water tank (1). A long rod (3) is fixed to the end of the detection mechanism (2). A sealing mechanism (4) is fixed to the long rod (3). The sealing mechanism (4) includes a base plate (401) and a rotating rod (402). The base plate (401) is fixedly mounted to the end of the long rod (3) by bolts. A stop block (5) is fixedly connected to the base plate (401). A washer (6) is engaged on the stop block (5). A rotating rod (402) is rotatably connected to the plate (401). A sliding rod (403) is threaded onto the rotating rod (402). A locking rod (404) is fixedly installed on the sliding rod (403). A stop rod (405) abuts against the locking rod (404). Two support blocks (407) are symmetrically fixedly connected to the stop block (5). The stop rod (405) is rotatably connected to the support block (407). The top end of the stop rod (405) abuts against the washer (6).

2. The tool for testing leakage of a valve body of an automobile according to claim 1, wherein: The abutment (5) is provided with a slot (7) at one end away from the base plate (401), and a washer (6) is engaged in the slot (7). The part where the washer (6) engages with the abutment (5) is rectangular in structure.

3. The tool for testing leakage of a valve body of an automobile according to claim 1, wherein: The sealing mechanism (4) further includes a groove (406), and the end of the abutment (405) near the slide rod (403) is provided with a groove (406), and the groove (406) is inclined.

4. The tool for testing a valve body of a vehicle for leakage as claimed in claim 3 wherein: The locking rod (404) is located in the slide groove (406), and the diameter of the locking rod (404) is equal to the width of the slide groove (406).

5. The tool for testing a valve body of a vehicle for leakage as claimed in claim 1 wherein: The rotating rod (402) is set in a regular hexagonal structure at the end away from the abutment block (5), and the sliding rod (403) is slidably connected to the base plate (401).

6. The fixture for testing automotive valve body leakage according to claim 1, characterized in that: The detection mechanism (2) includes a rotating shaft (201) and a bracket (202). The rotating shaft (201) is rotatably installed inside the water tank (1). Two brackets (202) are fixedly connected to the rotating shaft (201). A support plate (203) is fixedly connected to the end of the bracket (202). The support plate (203) is connected to the fixed plate (205) through a connecting rod (204).

7. The tool for testing a valve body of a vehicle for leakage as claimed in claim 6 wherein: The detection mechanism (2) also includes a hydraulic rod (206), which is fixedly installed between the support plate (203) and the fixing plate (205), and the telescopic end of the hydraulic rod (206) is fixedly connected to a clamp (207).

8. The tool for testing a valve body of a vehicle for leakage as claimed in claim 6 wherein: The fixing plate (205) is fixedly connected to the long rod (3) by bolts, and the long rod (3) penetrates the inner wall of the fixing plate (205) and the base plate (401).

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