EGR cooler leak detection device

Abstract

The utility model discloses an EGR cooler leak detection device, which relates to the cooler leak detection technology field, and comprises a leak detection platform, the bottom of the leak detection platform is fixedly connected with four support columns, stress beams are fixedly connected among the support columns, the back surface of the leak detection platform is fixedly connected with a cylinder frame, the top of the cylinder frame is provided with a clamping sealing mechanism, and the top of the cylinder frame is provided with a clamping sealing mechanism. A clamping concave bin is fixedly connected to the middle of the top of the leak detection platform, a cooler body is movably connected to the clamping concave bin, a support is fixedly connected to the top of the leak detection platform, and a detector is fixedly connected to the top of the support. The utility model has the advantages. The service life of the cooler is prolonged; and the reliability of the cooler is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooler leakage detection, in particular to an EGR cooler leakage detection device. Background Art

[0002] Exhaust gas recirculation (EGR) is a key emissions reduction technology in modern internal combustion engines. By reintroducing a portion of the exhaust gas into the intake system, it lowers the combustion temperature and thus reduces the formation of nitrogen oxides (NOx). The function of the EGR cooler is to cool the recirculated exhaust gas. Cooled exhaust gas can more effectively reduce combustion temperatures, further enhancing NOx reduction. Leaks in the EGR cooler can not only affect emissions reduction effectiveness but can also lead to reduced engine performance and poor fuel economy. EGR coolers typically have a complex internal structure, including multiple cooling channels, air inlets and outlets, and cooling medium lines, requiring leak detection equipment.

[0003] In existing EGR cooler leak detection equipment, the clamping device and the sealing device are usually designed and operated separately. This means that when performing a leak detection operation, it is necessary to first use the clamping device to fix the cooler, and then install the sealing device to seal the interface of the cooler. This step-by-step operation method is not only cumbersome and increases operation time and labor costs, but also prone to human errors during multiple operations, resulting in unstable sealing effects; existing EGR cooler leak detection equipment is often difficult to accurately control the clamping force when clamping the cooler. If the clamping force is too large, it will cause damage to the interface plate of the cooler. The interface plate of the cooler is usually the main component to ensure sealing, and its ability to withstand pressure is limited. When the clamping force exceeds its tolerance range, the entry and exit plates may deform, crack, etc., thereby affecting the normal use of the cooler. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide an EGR cooler leak detection device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an EGR cooler leak detection device includes a leak detection platform, four support columns are fixedly connected to the bottom of the leak detection platform, stress beams are fixedly connected between the support columns, the back of the leak detection platform is fixedly connected to the cylinder frame, the top of the cylinder frame is provided with a clamping sealing mechanism, the middle part of the top of the leak detection platform is fixedly connected to a clamping recess, the cooler body is movably connected to the clamping recess, the top of the leak detection platform is fixedly connected to a bracket, and the top of the bracket is fixedly connected to a detector.

[0006] As described above, the clamping and sealing mechanism includes a cylinder, inside which a telescopic rod is slidably connected. A buffer chamber is provided inside the telescopic rod. A limiting disc is slidably connected inside the buffer chamber. A spring is provided between one side of the limiting disc and the bottom of the buffer chamber. The other side of the limiting disc is fixedly connected to a clamping rod, and the other end of the clamping rod is fixedly connected to a clamping plate. A sealing ring is fixedly connected to the clamping plate, and two guide rods are fixedly connected to the clamping plate on one side of the clamping rod.

[0007] As described above, a guide plate is fixedly connected to the clamping recess. Two guide holes adapted to the guide rods are provided on the guide plate. A U-shaped plate is fixedly connected to the clamping recess.

[0008] As described above, an interface plate is fixedly connected to the cooler body. A number of interfaces are provided on the interface plate. A number of fastening plates are fixedly connected to the cooler body. An internal expansion opening is provided on the cooler body.

[0009] As described above, a telescopic chamber is fixedly connected to the bottom of the bracket. A telescopic tube is provided inside the telescopic chamber. One end of the telescopic tube is fixedly connected to the detector, and the other end of the telescopic tube is fixedly connected to an inflation head. A magnetic attraction ring one is fixedly connected to the telescopic chamber, and a magnetic attraction ring two is fixedly connected to the inflation head.

[0010] As described above, a taking groove is provided on the inflation head. An outer sealing sleeve is fixedly connected to the inflation head. A plug rod is fixedly connected inside the outer sealing sleeve, and a sealing ring is fixedly connected to the outer surface of the plug rod.

[0011] The technical solution provided by the present utility model has the following beneficial effects compared with the prior art:

[0012] First, by providing a rubber ring around the clamping plate in the present utility model, when the cylinder is started to clamp the interface plate on the cooler body with the clamping plate, the sealing ring made of rubber acts on the periphery of the surface of the interface plate, ensuring the sealing performance at the interface plate, and at the same time clamping the cooler body. After integrating the clamping and sealing functions, when performing the EGR cooler leak detection operation, there is no need to first perform the clamping operation and then the sealing operation like traditional equipment, but it can be done in one step. This greatly reduces the operation steps and time, and improves the efficiency of the overall detection process.

[0013] Second, by providing a buffer chamber inside the telescopic rod in the present utility model, when the cylinder is started to move the telescopic rod, after the clamping plate contacts the cooler body, the spring will be compressed due to the pressure, and finally the telescopic rod contacts the guide plate and stops moving. At this time, the pressure source for pressing the interface plate is the elastic force of the spring, which can ensure that the interface plate will not be damaged under excessive external force. This not only reduces the maintenance and replacement costs caused by the damage of the cooler, but also improves the service life and reliability of the cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic three-dimensional structure diagram of the present utility model;

[0015] Figure 2 is a schematic back structure diagram of the present utility model;

[0016] Figure 3 is Figure 1 a schematic partial sectional structure diagram of the clamping and sealing mechanism shown;

[0017] Figure 4 is Figure 1 a schematic structure diagram of the cooler body shown;

[0018] Figure 5 is Figure 1 a schematic sectional view of the inflation head shown.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Leak detection platform; 2. Support column; 3. Stress beam; 4. Cylinder frame; 5. Clamping and sealing mechanism; 6. Clamping recess; 7. Cooler body; 8. Bracket; 9. Detector; 10. Cylinder; 11. Telescopic rod; 12. Buffer cavity; 13. Limiting disc; 14. Spring; 15. Clamping rod; 16. Clamping plate; 17. Sealing ring; 18. Guide rod; 19. Guide plate; 20. Guide hole; 21. U-shaped plate; 22. Interface plate; 23. Interface; 24. Fastening plate; 25. Inner expansion opening; 26. Telescopic cavity; 27. Telescopic tube; 28. Inflation head; 29. Magnetic attraction ring one; 30. Magnetic attraction ring two; 31. Taking groove; 32. Outer sealing sleeve; 33. Insert rod; 34. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the accompanying drawings.

[0021] As Figure 1-4As shown in the figure, the utility model provides a technical solution: an EGR cooler leak detection device, including a leak detection platform 1. Four support columns 2 are fixedly connected to the bottom of the leak detection platform 1. A stress beam 3 is fixedly connected between the support columns 2. A cylinder frame 4 is fixedly connected to the back of the leak detection platform 1. A clamping and sealing mechanism 5 is arranged at the top of the cylinder frame 4. A clamping concave bin 6 is fixedly connected to the middle of the top of the leak detection platform 1. A cooler body 7 is movably connected to the clamping concave bin 6. A bracket 8 is fixedly connected to the top of the leak detection platform 1. A detector 9 is fixedly connected to the top of the bracket 8. The clamping and sealing mechanism 5 includes a cylinder 10. A telescopic rod 11 is slidably connected inside the cylinder 10. A buffer cavity 12 is opened inside the telescopic rod 11. A limiting disc 13 is slidably connected inside the buffer cavity 12. A spring 14 is arranged between one side of the limiting disc 13 and the bottom of the buffer cavity 12. A clamping rod 15 is fixedly connected to the other side of the limiting disc 13. A clamping plate 16 is fixedly connected to the other end of the clamping rod 15. A sealing ring 17 is fixedly connected to the clamping plate 16. Two guide rods 18 are fixedly connected to the clamping plate 16 on one side of the clamping rod 15. A guide plate 19 is fixedly connected to the clamping concave bin 6. Two guide holes 20 adapted to the guide rods 18 are opened on the guide plate 19. A U-shaped plate 21 is fixedly connected to the clamping concave bin 6. An interface plate 22 is fixedly connected to the cooler body 7. A number of interfaces 23 are opened on the interface plate 22. A number of fastening plates 24 are fixedly connected to the cooler body 7. An internal expansion port 25 is opened on the cooler body 7. A telescopic bin 26 is fixedly connected to the bottom of the bracket 8. A telescopic tube 27 is arranged inside the telescopic bin 26. One end of the telescopic tube 27 is fixedly connected to the detector 9. The other end of the telescopic tube 27 is fixedly connected to an inflation head 28. A magnetic ring one 29 is fixedly connected to the telescopic bin 26. A magnetic ring two 30 is fixedly connected to the inflation head 28. A taking groove 31 is opened on the inflation head 28. An outer sealing sleeve 32 is fixedly connected to the inflation head 28. A plug rod 33 is fixedly connected to the inside of the outer sealing sleeve 32. A sealing ring 34 is fixedly connected to the outer surface of the plug rod 33. The model of the detector 9 is

LEAK-D550

[0022] Working principle: By arranging a circle of sealing ring 17 on the clamping plate 16, when the cylinder 10 is started to make the clamping plate 16 clamp the interface plate 22 on the cooler body 7, the sealing ring 17 made of rubber acts on the outer surface of the interface plate 22 to ensure the sealing at the interface plate 22 and clamp the cooler body 7 at the same time. At the same time, a buffer chamber 12 is provided inside the telescopic rod 11. When the cylinder 10 is started to move the telescopic rod 11, after the clamping plate 16 contacts the cooler body 7, the spring 14 will be compressed due to pressure, and finally the telescopic rod 11 contacts the guide plate 19 to stop moving. At this time, the pressure source for the interface plate 22 is the elastic force of the spring 14, which can ensure that the interface plate 22 will not be damaged by excessive external force.

[0023] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. An EGR cooler leak detection device, comprising a leak detection platform (1), characterized in that: The bottom of the leak detection platform (1) is fixedly connected to four support columns (2), and stress beams (3) are fixedly connected between the support columns (2). The back of the leak detection platform (1) is fixedly connected to a cylinder frame (4), and a clamping sealing mechanism (5) is provided on the top of the cylinder frame (4). A clamping recess (6) is fixedly connected to the middle of the top of the leak detection platform (1), and a cooler body (7) is movably connected to the clamping recess (6). The top of the leak detection platform (1) is fixedly connected to a bracket (8), and the top of the bracket (8) is fixedly connected to a detector (9).

2. The EGR cooler leak detection device according to claim 1, characterized in that: The clamping and sealing mechanism (5) includes a cylinder (10), a telescopic rod (11) is slidably connected inside the cylinder (10), a buffer chamber (12) is provided inside the telescopic rod (11), a limiting plate (13) is slidably connected inside the buffer chamber (12), a spring (14) is provided between one side of the limiting plate (13) and the bottom of the buffer chamber (12), a clamping rod (15) is fixedly connected to the other side of the limiting plate (13), a clamping plate (16) is fixedly connected to the other end of the clamping rod (15), a sealing ring (17) is fixedly connected to the clamping plate (16), and two guide rods (18) are fixedly connected to the clamping plate (16) on one side of the clamping rod (15).

3. The EGR cooler leak detection device according to claim 1, characterized in that: A guide plate (19) is fixedly connected to the clamping recess (6), and two guide holes (20) are provided on the guide plate (19) that are compatible with the guide rods (18). A U-shaped plate (21) is fixedly connected to the clamping recess (6).

4. The EGR cooler leak detection device according to claim 1, characterized in that: An interface plate (22) is fixedly connected to the cooler body (7), and a plurality of interfaces (23) are provided on the interface plate (22). A plurality of fastening plates (24) are fixedly connected to the cooler body (7), and an inner expansion opening (25) is provided on the cooler body (7).

5. The EGR cooler leak detection device according to claim 1, characterized in that: The bottom of the bracket (8) is fixedly connected to a telescopic bin (26), a telescopic tube (27) is provided inside the telescopic bin (26), one end of the telescopic tube (27) is fixedly connected to the detector (9), and the other end of the telescopic tube (27) is fixedly connected to an inflation head (28), a magnetic ring 1 (29) is fixedly connected to the telescopic bin (26), and a magnetic ring 2 (30) is fixedly connected to the inflation head (28).

6. The EGR cooler leak detection device according to claim 5, characterized in that: The inflation head (28) is provided with a taking groove (31), the inflation head (28) is fixedly connected to an outer sealing sleeve (32), the inner part of the outer sealing sleeve (32) is fixedly connected to an insertion rod (33), and the outer surface of the insertion rod (33) is fixedly connected to a sealing ring (34).

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