Automobile exhaust pipe airtightness detection device

Abstract

The utility model discloses an automobile exhaust pipe airtightness detection device comprising a device body, the top of the device body is fixedly connected with symmetrically arranged supporting plates, the outer side wall of one of the supporting plates is fixedly connected with a driving motor, and the output end of the driving motor penetrates through the supporting plate and is fixedly connected with a rotating rod. The outer side wall of the rotating rod is fixedly sleeved with a rotating plate, the rotating plate is connected with a concave support, the concave support is connected with a pushing mechanism, the top of the device body is fixedly connected with a water tank, sealing gaskets can be automatically and tightly pressed to the two ends of an exhaust pipe in the detection process through the pushing mechanism, and therefore the sealing performance is ensured; the exhaust pipe detection device is simple in structure and convenient to operate, errors of manual operation are reduced, redundant moisture is automatically recycled after detection is finished, it is ensured that the detected exhaust pipe is dry and clean, troubles caused by water drops are avoided, important improvement is made in the aspects of operation convenience and follow-up treatment, and the requirements of modern production are met.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing device for automobile exhaust pipes. Background Technology

[0002] Automotive exhaust pipe air tightness testing equipment is used to evaluate the air tightness performance of exhaust pipes after welding to ensure that there will be no leakage during operation. However, existing equipment has some problems.

[0003] First, current exhaust pipe welding airtightness testing equipment cannot effectively seal both ends of the exhaust pipe, which may lead to inaccurate test results and a lack of intuitiveness, making it difficult to directly determine whether the exhaust pipe is completely sealed. Second, these devices cannot continuously and efficiently perform batch testing of exhaust pipes, affecting production efficiency and product quality control. In addition, water droplets often remain on the outer wall of the exhaust pipe after testing, which not only increases the workload of subsequent processing but may also adversely affect the appearance quality and performance. These problems seriously affect the testing process in automobile manufacturing and require more advanced technologies to improve it. Utility Model Content

[0004] The purpose of this invention is to solve the problem of inconvenient replacement of exhaust pipes in the existing technology, and to propose an exhaust pipe airtightness testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An airtightness testing device for automotive exhaust pipes includes a device body. Symmetrically arranged support plates are fixedly connected to the top of the device body. A drive motor is fixedly connected to the outer wall of one of the support plates. The output end of the drive motor passes through the support plate and is fixedly connected to a rotating rod. A rotating plate is fixedly sleeved on the outer wall of the rotating rod. A concave bracket is connected to the rotating plate. A pushing mechanism is connected to the concave bracket. A water tank is fixedly connected to the top of the device body.

[0007] Preferably, the pushing mechanism includes a cylinder fixedly connected to the inner wall of the concave bracket, a push rod fixedly connected to the output end of the cylinder, two symmetrically arranged mounting blocks fixedly connected to the outer wall of the push rod, a transmission rod rotatably connected to the mounting blocks, an adjusting rod rotatably connected to the end of the transmission rod, and both adjusting rods connected to a pneumatic mechanism.

[0008] Preferably, the pneumatic mechanism includes a first air box, a second air box connected to the first air box via an air transmission pipe, a push plate slidably connected to the inner wall of the first air box, the outer wall of the push plate being connected to the adjusting rod, two sliding plates slidably connected to the inner wall of the second air box, the two sliding plates being connected by a telescopic spring, a transmission column passing through the second air box, the end of the transmission column being fixedly connected to the outer wall of one of the sliding plates, the other end of the transmission column being connected to a pressure plate, one of the pressure plates being connected to an air replenishment mechanism, and the other pressure plate being connected to a rotation mechanism.

[0009] Preferably, the air replenishment mechanism includes a high-pressure air station fixedly connected to the outer wall of the pressure plate. The output end of the high-pressure air station is connected to a first vent pipe and an airflow pipe. The first vent pipe is connected to a first abutting cone. The airflow pipe is a telescopic pipe with multiple air outlets located at the bottom of the airflow pipe to facilitate air drying of the exhaust pipe.

[0010] Preferably, the rotating mechanism includes a servo motor, which is fixedly connected to the outer wall of the pressure plate, and the output end of the servo motor is fixedly connected to a second abutting cone.

[0011] Preferably, the length of the water tank is longer than the distance between the two air transmission pipes, so as to facilitate the insertion of the exhaust pipe into the water tank.

[0012] This utility model has the following advantages compared with the prior art:

[0013] 1. By using a pushing mechanism, this utility model can automatically press the sealing gasket tightly onto both ends of the exhaust pipe during the testing process, thereby ensuring the sealing performance. This not only improves the accuracy of the test, but also reduces the error caused by human operation.

[0014] 2. By using a drive motor as a power source, the utility model achieves continuity and high efficiency in the testing process through automated control. The equipment completes the airtightness test of the exhaust pipe, significantly improving work efficiency. By automatically recovering excess moisture after the test, it ensures that the exhaust pipe is dry and clean after the test, avoiding the trouble caused by water droplets. It not only achieves efficient airtightness testing in terms of technology, but also makes important improvements in terms of ease of operation and subsequent processing, meeting the needs of modern production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an automotive exhaust pipe airtightness testing device proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of an automotive exhaust pipe airtightness testing device proposed in this utility model;

[0017] Figure 3This is a schematic diagram of the air pressure mechanism of an automotive exhaust pipe airtightness testing device proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the air replenishment mechanism of an automotive exhaust pipe airtightness testing device proposed in this utility model.

[0019] In the diagram: 1. Device body; 2. Support plate; 3. Water tank; 4. Drive motor; 5. Rotating rod; 6. Rotating plate; 7. Concave bracket; 8. First air box; 9. Second air box; 10. Air transmission pipe; 11. Slide plate; 12. Push plate; 13. Telescopic spring; 14. Transmission column; 15. Pressure plate; 16. Cylinder; 17. Push rod; 18. Transmission rod; 19. Mounting block; 20. Adjusting rod; 21. First contact cone; 22. Servo motor; 23. Airflow pipe; 24. High-pressure air station; 25. Second contact cone. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Reference Figure 1 - Figure 4 A device for testing the air tightness of automotive exhaust pipes includes a device body 1. Symmetrically arranged support plates 2 are fixedly connected to the top of the device body 1. The support plates 2 not only provide structural support but also provide mounting points for other key components. A drive motor 4 is fixedly connected to the outer wall of one of the support plates 2. The output end of the drive motor 4 passes through the support plate 2 and is fixedly connected to a rotating rod 5. The rotating rod 5 is typically made of stainless steel or high-strength alloy material, possessing good corrosion resistance and mechanical strength. A rotating plate 6 is fixedly sleeved on the outer wall of the rotating rod 5. The rotating plate 6 is connected to a concave bracket 7, which is connected to a pushing mechanism. A water tank 3 is fixedly connected to the top of the device body 1 to provide the water source required during the testing process, ensuring more accurate and intuitive results for the exhaust pipe's airtightness testing.

[0023] The pushing mechanism includes a cylinder 16 fixedly connected to the inner wall of the concave bracket 7. A push rod 17 is fixedly connected to the output end of the cylinder 16. Two symmetrically arranged mounting blocks 19 are fixedly connected to the outer wall of the push rod 17. A transmission rod 18 is rotatably connected to the mounting block 19. An adjusting rod 20 is rotatably connected to the end of the transmission rod 18. Both adjusting rods 20 are connected to a pneumatic mechanism. Due to the rotatable connection design between the mounting block 19 and the transmission rod 18, the linear motion of the push rod 17 is converted into the rotational motion of the transmission rod 18. This rotational motion is then transmitted to the pneumatic mechanism through the adjusting rod 20, ultimately realizing the power transmission and adjustment required in the airtightness testing process. Specifically, this structural design can ensure the smoothness of the push rod 17's movement and the accuracy of the transmission, thereby effectively improving the reliability and efficiency of the entire testing equipment.

[0024] The pneumatic mechanism includes a first air box 8, which is connected to a second air box 9 via an air transmission pipe 10. A push plate 12 is slidably connected to the inner wall of the first air box 8, and the outer wall of the push plate 12 is connected to an adjusting rod 20. Two sliding plates 11 are slidably connected to the inner wall of the second air box 9, and the two sliding plates 11 are connected by a telescopic spring 13. The telescopic spring 13 provides the necessary elastic force under the tension or compression state between the sliding plates 11 to ensure that the sliding plates 11 can move stably under different pressure conditions. A transmission column 14 passes through the second air box 9, and the end of the transmission column 14 is fixedly connected to the outer wall of one of the sliding plates 11. The other end of the transmission column 14 is connected to a pressure plate 15, which generates force at the corresponding position to clamp the exhaust pipe. One pressure plate 15 is connected to an air supply mechanism, and the other pressure plate 15 is connected to a rotating mechanism.

[0025] The air replenishment mechanism includes a high-pressure air station 24 fixedly connected to the outer wall of the pressure plate 15. The output end of the high-pressure air station 24 is connected to a first vent pipe and an airflow pipe 23. The first vent pipe is connected to a first abutting cone 21. The airflow pipe 23 is a telescopic pipe with multiple air outlets located at the bottom of the airflow pipe 23. The first abutting cone 21 has air holes and communicates with the first vent pipe to facilitate air drying of the exhaust pipe. The multiple air outlets at the bottom of the airflow pipe 23 can flexibly adapt to exhaust pipes of different lengths and diameters, improving the applicability of the equipment.

[0026] The rotating mechanism includes a servo motor 22, which is fixedly connected to the outer wall of the pressure plate 15. The output end of the servo motor 22 is fixedly connected to a second abutting cone 25. This series of connections and fixing operations ensures the stability and reliability of the rotating mechanism in practical applications.

[0027] The length of the water tank 3 is longer than the distance between the two air transmission pipes 10, which facilitates the insertion of the exhaust pipe into the water tank 3. This design ensures that the car exhaust pipe can be easily placed in the water tank 3 for comprehensive air tightness testing. The design length of the water tank 3 exceeds the distance between the two air transmission pipes 10, which provides ample space for the exhaust pipe to fully expand underwater without being restricted by the boundaries of the water tank 3. The water tank 3 can be made of metal or high-density plastic to ensure its sturdiness and durability.

[0028] The specific working principle of this utility model is as follows:

[0029] In actual operation, when this device is used, the user first puts the exhaust pipe of the car to be tested onto the second contact cone 25, starts the cylinder 16, the cylinder 16 drives the push rod 17 to extend, thereby driving the transmission rod 18 and the adjusting rod 20 to move. Since the adjusting rod 20 is fixedly connected to the push plate 12, the gas in the first air box 8 is transmitted to the second air box 9 through the air transmission pipe 10, thereby pushing the slide plate 11. The telescopic spring 13 plays a buffering role. The slide plate 11 drives the transmission column 14 to move, thereby the transmission column 14 drives the two pressure plates 15 to move relative to each other. The two pressure plates 15 firmly fix the exhaust pipe.

[0030] Fill water tank 3 with tap water, start drive motor 4 to rotate rotating rod 5, which in turn rotates rotating plate 6. Rotating plate 6 rotates concave bracket 7, immersing the exhaust pipe to be tested into water tank 3. Then start high-pressure gas station 24, which generates gas and sends it through first vent pipe and first contact cone 21 into the exhaust pipe to be tested, ensuring that the gas in the exhaust pipe is pressurized. Observe whether there is any leakage in water tank 3. If no leakage is found, it indicates that the exhaust pipe has good airtightness; otherwise, it indicates that there is an airtightness problem, which requires further inspection and repair. Start drive motor 4 to lift the exhaust pipe from water tank 3 to a certain height. The gas generated by high-pressure gas station 24 will be discharged through the vent in airflow pipe 23 to dry the exhaust pipe.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for testing the air tightness of an automotive exhaust pipe, comprising a device body (1), characterized in that, The device body (1) is fixedly connected to a symmetrically arranged support plate (2) on the top. One of the support plates (2) is fixedly connected to a drive motor (4) on the outer wall. The output end of the drive motor (4) passes through the support plate (2) and is fixedly connected to a rotating rod (5). A rotating plate (6) is fixedly sleeved on the outer wall of the rotating rod (5). A concave bracket (7) is connected to the rotating plate (6). A pushing mechanism is connected to the concave bracket (7). A water tank (3) is fixedly connected to the top of the device body (1).

2. The automotive exhaust pipe airtightness testing device according to claim 1, characterized in that, The pushing mechanism includes a cylinder (16) fixedly connected to the inner wall of the concave bracket (7). A push rod (17) is fixedly connected to the output end of the cylinder (16). Two symmetrically arranged mounting blocks (19) are fixedly connected to the outer wall of the push rod (17). A transmission rod (18) is rotatably connected to the mounting block (19). An adjusting rod (20) is rotatably connected to the end of the transmission rod (18). Both adjusting rods (20) are connected to a pneumatic mechanism.

3. The automotive exhaust pipe airtightness testing device according to claim 2, characterized in that, The pneumatic mechanism includes a first air box (8), which is connected to a second air box (9) via an air transmission pipe (10). A push plate (12) is slidably connected to the inner wall of the first air box (8), and the outer wall of the push plate (12) is connected to the adjusting rod (20). Two sliding plates (11) are slidably connected to the inner wall of the second air box (9), and the two sliding plates (11) are connected by a telescopic spring (13). A transmission column (14) passes through the second air box (9), and the end of the transmission column (14) is fixedly connected to the outer wall of one of the sliding plates (11). The other end of the transmission column (14) is connected to a pressure plate (15), one of the pressure plates (15) is connected to an air replenishment mechanism, and the other pressure plate (15) is connected to a rotating mechanism.

4. The automotive exhaust pipe airtightness testing device according to claim 3, characterized in that, The air replenishment mechanism includes a high-pressure air station (24) fixedly connected to the outer wall of the pressure plate (15). The output end of the high-pressure air station (24) is connected to a first ventilation pipe and an airflow pipe (23). The first ventilation pipe is connected to a first abutting cone (21). The airflow pipe (23) is a telescopic pipe. The airflow pipe (23) is provided with multiple air outlets. The air outlets are located at the bottom of the airflow pipe (23) to facilitate air drying of the exhaust pipe.

5. The automotive exhaust pipe airtightness testing device according to claim 3, characterized in that, The rotating mechanism includes a servo motor (22), which is fixedly connected to the outer wall of the pressure plate (15), and the output end of the servo motor (22) is fixedly connected to a second abutting cone (25).

6. The automotive exhaust pipe airtightness testing device according to claim 3, characterized in that, The length of the water tank (3) is longer than the distance between the two air transmission pipes (10), so that the exhaust pipe can be put into the water tank (3).

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