An oil cooler air tightness detection device

Abstract

This utility model relates to the field of oil cooler testing, specifically an oil cooler airtightness testing device, including a working box. Airbag 1 and Airbag 2 are fixedly connected to the inner wall of the working box. The working box is fixedly installed on the top of a working plate, and an air pump is fixedly installed on the top of the working plate. The air outlet of the air pump is fixedly connected to and connected to a distribution pipe, which injects air into the inflation component and the testing component. This utility model uses inflated airbags 1 and 2 for clamping. Compared with traditional clamping plates with rubber pads, airbags 1 and 2 can conform to the uneven outer wall of the cooler, avoiding uneven local pressure and reducing cooler damage. Pressure sensors 1 and 2 monitor the pressure of airbags 1 and 2 in real time, and, in conjunction with a PLC controller, automatically control the opening and closing of electric valves 1 and 2 to ensure precise clamping force and prevent excessively loose or tight clamping.

Description

Technical Field

[0001] This utility model relates to the field of oil cooler testing, specifically an oil cooler airtightness testing device. Background Technology

[0002] The oil cooler is a key component of the diesel engine lubrication system. The airtightness of its internal chambers directly affects the lubrication effect and operational safety of the diesel engine. If the cooler has airtightness defects, it will lead to oil leakage, causing diesel engine lubrication failure, accelerated wear of parts and other malfunctions. Therefore, it is necessary to conduct airtightness testing on the oil circuit of the oil cooler during production.

[0003] Commonly used oil coolers for diesel engines include air-cooled oil coolers. The oil cooler for a vertical single-cylinder air-cooled diesel engine consists of an upper housing and a lower housing. The upper housing has an oil inlet and an oil outlet at its top. Existing oil cooler airtightness testing devices are used to test it. The oil cooler is placed on a workbench and secured with a fixing structure. An insertion tube is then inserted into the oil inlet and outlet. A connecting hose fixed to the upper end of the insertion tube is connected to an air pump (or other air filling device), allowing air to flow. The air fills the cooler's interior and then overflows. A significant difference in pressure reading indicates poor airtightness. However, in actual use… When fixing the oil cooler with the fixing components, since the air-cooled oil cooler is roughly rectangular in shape, clamping plates and rubber pads are used to clamp and fix the two sides of the outer wall of the oil cooler. However, the two sides of the oil cooler are not flat. Although the rubber pads have a certain degree of elasticity, when the rubber pads are squeezed and used with the clamping plates to fix the oil cooler, the pressure on different areas of the rubber pads will still be uneven. Over time, the rubber pads are prone to shrinkage, and the air-cooled oil cooler will also be unstable. In addition, the function of the air pump is only to inject air into the oil passage of the air-cooled oil cooler, and its function is singular. Therefore, we propose an oil cooler air tightness detection device. Utility Model Content

[0004] The purpose of this utility model is to provide an oil cooler airtightness testing device, including a working box. An airbag one and an airbag two are fixedly connected to the inner wall of the working box. The working box is fixedly installed on the top of a working plate. An air pump is fixedly installed on the top of the working plate. The air outlet of the air pump is fixedly connected to and connected to a distribution pipe. The distribution pipe injects air into an inflation component and a testing component. After the inflation component is inflated, the airbag one and the airbag two inflate to clamp the oil cooler. After the testing component is inflated, air is injected into the oil passage of the oil cooler to test the airtightness of the oil cooler.

[0005] Preferably, the inflation assembly includes an air tube one, with a branch air tube fixedly connected to the middle of the air tube one, an electric valve one fixedly connected to one end of the air tube one, an air tube two fixedly connected to the electric valve one, an air tube two penetrating the inside of the working box and connecting to an airbag one, an electric valve two fixedly connected to the other end of the air tube one, an air tube three fixedly connected to the electric valve two, and an air tube three penetrating the inside of the working box and connecting to an airbag two.

[0006] Preferably, a set of stabilizing seats is fixedly installed on the outer wall of the second and third trachea respectively, and both sets of stabilizing seats are fixedly installed on the top of the working plate.

[0007] Preferably, two sets of stabilizing seats are fixedly installed on the outer wall of the gas distribution pipe, and both sets of stabilizing seats are fixedly installed on the top of the working plate.

[0008] Preferably, a support frame is fixedly installed at the top of the working plate by bolts, and a hydraulic cylinder is fixedly installed at the top of the support frame. The telescopic end of the hydraulic cylinder slides through the inner side of the support frame and is fixedly connected to the lifting plate. A sealing tube and an insertion tube are installed through the lifting plate. A set of rubber sleeves are fixedly installed on the outer wall of the sealing tube and the insertion tube respectively. A barometer is fixedly installed on the sealing tube, and the air pressure of the sealing tube is detected by the barometer.

[0009] Preferably, the support frame has four sets of guide rods that slide through its inner side, and the bottom of each of the four sets of guide rods is fixedly connected to a lifting plate.

[0010] Preferably, the detection component includes an electric valve three, which is fixedly connected to and connected to the gas distribution pipe, and one end of the electric valve three is fixedly connected to and connected to the spring hose. The other end of the spring hose is connected to one end of the fixed pipe. The other end of the fixed pipe is connected to the insertion tube through a one-way valve. A stabilizing seat three is fixedly installed on the outer wall of the fixed pipe. The stabilizing seat three is fixedly installed on the top of the lifting plate.

[0011] Preferably, two sets of horizontal plates are fixedly installed on the inner wall of the work box. Airbag 1 and Airbag 2 are fixedly connected to the bottom of the two sets of horizontal plates respectively. Pressure sensor 1 and Pressure sensor 2 are installed in the mounting holes of the two sets of horizontal plates respectively. Pressure sensor 1 contacts airbag 1, and pressure sensor 2 contacts airbag 2. Pressure sensor 1 and Pressure sensor 2 are both connected to a PLC controller through wires. The PLC controller is fixedly installed on the top of the work plate. The PLC controller controls the air pump through a contactor. The PLC controller controls electric valve 1, electric valve 2 and electric valve 3 through three sets of relays respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses airbag one and airbag two for inflatable clamping. Compared with the traditional clamping plate with rubber pad, airbag one and airbag two can fit against the uneven outer wall of the cooler, avoiding uneven local pressure and reducing damage to the cooler. In addition, pressure sensor one and pressure sensor two monitor the pressure of airbag one and airbag two in real time. With the help of the PLC controller, the opening and closing of electric valve one and electric valve two are automatically controlled to ensure accurate clamping force and prevent the fixation from being too loose or too tight.

[0013] 2. The air pump in this utility model supplies power to both the inflation component and the detection component through the air distribution pipe, which not only meets the inflation requirements of the airbag clamping, but also provides gas for the air injection detection of the cooler oil circuit, avoiding the need to set up multiple separate devices, simplifying the device structure and reducing costs.

[0014] 3. The rubber sleeves on the outer walls of the sealing tube and the insertion tube can be squeezed when inserted into the oil inlet and outlet of the cooler to ensure the sealing at the interface and prevent gas leakage from affecting the test results. The one-way valve in the test component can prevent the air injected into the oil circuit from flowing back. Combined with the barometer to monitor the air pressure change in real time, the oil circuit sealing can be clearly judged (a continuous drop in air pressure indicates poor sealing, while a stable reading indicates good sealing). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another angle; Figure 3 This is a schematic diagram of part of the structure of this utility model; Figure 4 This is a schematic diagram of the inflatable assembly; Figure 5 This is a schematic diagram of the detection component.

[0016] In the diagram: 1. Working box; 2. Airbag 1; 3. Airbag 2; 4. Inflation assembly; 401. Air hose 1; 402. Electric valve 1; 403. Air hose 2; 404. Electric valve 2; 405. Air hose 3; 5. Working plate; 6. Air pump; 7. Air distribution pipe; 8. Detection assembly; 801. Electric valve 3; 802. Spring hose; 803. Fixing pipe; 804. One-way valve; 805. Stabilizer 3; 9. Stabilizer 1; 10. Stabilizer 2; 11. Support frame; 12. Hydraulic cylinder; 13. Lifting plate; 14. Sealing pipe; 15. Insertion tube; 16. Rubber sleeve; 17. Barometer; 18. Guide rod; 19. Pressure sensor 1; 20. Pressure sensor 2; 21. PLC controller; 22. Horizontal plate. Detailed Implementation

[0017] 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.

[0018] Reference Figure 1 - Figure 5 This utility model discloses an oil cooler airtightness testing device, comprising a working box 1, with an airbag 2 and an airbag 3 fixedly connected to the inner wall of the working box 1. The working box 1 is fixedly installed on the top of a working plate 5, and an air pump 6 is fixedly installed on the top of the working plate 5. The air outlet of the air pump 6 is fixedly connected to and connected to a distribution pipe 7. The distribution pipe 7 injects air into an inflation component 4 and a testing component 8. After the inflation component 4 is inflated, the airbags 2 and 3 inflate to clamp the oil cooler. After the testing component 8 is inflated, air is injected into the oil passage of the oil cooler to test the airtightness of the oil cooler.

[0019] The inflation assembly 4 includes an air tube 401, which is fixedly connected to and connected to a distribution air tube 7 at its middle position. One end of the air tube 401 is fixedly connected to and connected to an electric valve 402. The electric valve 402 is fixedly connected to and connected to an air tube 403. The air tube 403 passes through the inside of the working box 1 and connects to an airbag 2. The other end of the air tube 401 is fixedly connected to and connected to an electric valve 404. The electric valve 404 is fixedly connected to and connected to an air tube 405. The air tube 405 passes through the inside of the working box 1 and connects to an airbag 3. In use, air in the distribution air tube 7 enters the air tube 401, and air in the air tube 401 enters the air tube 403 and air tube 405 respectively through the electric valve 402 and the electric valve 404, thereby inflating the airbags 2 and 3.

[0020] A set of stabilizing seats 9 are fixedly installed on the outer walls of the second air tube 403 and the third air tube 405 respectively. Both sets of stabilizing seats 9 are fixedly installed on the top of the working plate 5. The two sets of stabilizing seats 9 make the installation structure of the second air tube 403 and the third air tube 405 stable, thereby making the installation structure of the entire inflation assembly 4 stable.

[0021] Two sets of stabilizing seats 10 are fixedly installed on the outer wall of the gas distribution pipe 7. Both sets of stabilizing seats 10 are fixedly installed on the top of the working plate 5. By connecting these stabilizing seats 10, the installation structure of the gas distribution pipe 7 is stabilized.

[0022] A support frame 11 is bolted to the top of the working plate 5. A hydraulic cylinder 12 is fixedly mounted to the top of the support frame 11. The telescopic end of the hydraulic cylinder 12 slides through the inner side of the support frame 11 and is fixedly connected to the lifting plate 13. A sealing tube 14 and an insertion tube 15 are installed through the lifting plate 13. A set of rubber sleeves 16 are fixedly installed on the outer walls of the sealing tube 14 and the insertion tube 15 respectively. A pressure gauge 17 is fixedly installed on the sealing tube 14 to detect the air pressure of the sealing tube 14. In use, starting the hydraulic cylinder 12 will cause the lifting plate 13 to move downward. The downward movement of the lifting plate 13 will cause the sealing tube 14 and the insertion tube 15 to move downward, so that the sealing tube 14 and the insertion tube 15 are inserted into the oil inlet and oil outlet respectively, and the rubber sleeve 16 will contact the outer wall of the oil cooler, so that the rubber sleeve 16 is squeezed, thereby maintaining good sealing between the sealing tube 14 and the oil outlet, and between the insertion tube 15 and the oil inlet. The air pressure in the sealing tube 14 can be detected in real time by the air pressure gauge 17. It should be noted that when the hydraulic cylinder 12 is used, it needs to be used in conjunction with a hydraulic pump, hydraulic pipeline, etc., and the hydraulic pump and its controller need to be connected to a suitable external power supply.

[0023] The support frame 11 has four sets of guide rods 18 that slide through its inner side, and the bottom of each of the four sets of guide rods 18 is fixedly connected to the lifting plate 13; the lifting plate 13 can move up and down stably through the four sets of guide rods 18.

[0024] The detection component 8 includes an electric valve 801, which is fixedly connected to and connected to the air distribution pipe 7. One end of the electric valve 801 is also fixedly connected to and connected to the spring hose 802. The other end of the spring hose 802 is connected to one end of a fixed pipe 803. The other end of the fixed pipe 803 is connected to the insertion tube 15 via a one-way valve 804. A stabilizing seat 805 is fixedly installed on the outer wall of the fixed pipe 803, and the stabilizing seat 805 is fixedly installed on the top of the lifting plate 13. In use, when the electric valve 801 is opened, air in the air distribution pipe 7 enters the spring hose 802 through the electric valve 801. Air in the spring hose 802 then enters the insertion tube 15 through the fixed pipe 803 and the one-way valve 804. The one-way valve 804 prevents air in the insertion tube 15 from flowing back into the fixed pipe 803. The stabilizing seat 805 ensures a stable installation structure between the fixed pipe 803 and the lifting plate 13.

[0025] Two sets of horizontal plates 22 are fixedly installed on the inner wall of the working box 1. Airbag 1 2 and airbag 2 3 are respectively fixedly connected to the bottom of the two sets of horizontal plates 22. Pressure sensor 1 19 and pressure sensor 2 20 are respectively installed in the mounting holes of the two sets of horizontal plates 22. Pressure sensor 1 19 contacts airbag 1 2, and pressure sensor 20 contacts airbag 2 3. Both pressure sensor 1 19 and pressure sensor 2 2 are connected to PLC controller 21 via wires. PLC controller 21 is fixedly installed on the top of the working plate 5. PLC controller 21 controls air pump 6 via contactor and electric valve 40 via three sets of relays. 2. Electric valve 404 and electric valve 801; When inflating airbags 2 and 3 to fix the oil cooler, pressure sensor 19 detects the pressure change inside airbag 2 in real time, and pressure sensor 20 detects the pressure change inside airbag 3 in real time. Pressure sensors 19 and 20 transmit the detected pressure signals to the PLC controller 21 fixed in the working area through wires. The PLC controller 21 acts as the control core, analyzes and processes the received pressure signals, and controls the relevant actuators according to preset logic or parameters. It should be noted that when using air pump 6, it needs to be connected to a suitable external power supply with its dedicated controller and controlled by its controller.

[0026] The working principle of this utility model is as follows: When in use, the device is connected to a suitable external power source. The oil cooler is placed in the working box 1, and the sealing tube 14 and the insertion tube 15 are aligned with the oil inlet and oil outlet of the oil cooler, respectively. Then, the hydraulic cylinder 12 is started, which drives the lifting plate 13 to move down. The movement of the lifting plate 13 will drive the sealing tube 14 and the insertion tube 15 to move down, so that the sealing tube 14 and the insertion tube 15 are inserted into the oil inlet and oil outlet, respectively. The rubber sleeve 16 will contact the outer wall of the oil cooler, so that the rubber sleeve 16 is squeezed, thereby maintaining good sealing between the sealing tube 14 and the oil outlet, and between the insertion tube 15 and the oil inlet. The air pressure in the sealing tube 14 can be detected in real time by the barometer 17. At this time, electric valve 1 (402) and electric valve 2 (404) are open, and electric valve 3 (801) is closed. Air pump 6 is activated to draw outside air into the air distribution pipe 7, and the air in the air distribution pipe 7 enters air pipe 1 (401). Inside, air from air tube 1 401 enters air tube 2 403 and air tube 3 405 through electric valves 1 402 and 2 404 respectively, thus inflating airbags 1 2 and 2 3. The inflated airbags 1 2 and 2 3 limit and fix the oil cooler. During this process, pressure sensor 19 detects the pressure change inside airbag 1 2 in real time, and pressure sensor 20 detects the pressure change inside airbag 2 3 in real time. Pressure sensors 1 19 and 2 20 transmit the detected pressure signals to the working PLC controller 21 fixed in the working box 1 through wires. The PLC controller 21, as the control core, analyzes and processes the received pressure signals. When pressure sensor 19 reaches the preset value, the PLC controller 21 automatically controls the closing of electric valve 1 402. When pressure sensor 20 reaches the preset value, the PLC controller 21 automatically controls the closing of electric valve 2 404. At this time, airbags 1 2 and 2 3 are inflated, which can effectively fix the oil cooler in the working box 1. When both pressure sensor 19 and pressure sensor 20 reach their preset values, PLC controller 21 automatically controls the opening of electric valve 3 801. At this time, the air in the air distribution pipe 7 enters the spring hose 802 through electric valve 3 801. The air in the spring hose 802 enters the insertion pipe 15 through the fixed pipe 803 and the one-way valve 804. Under the action of the one-way valve 804, the air in the insertion pipe 15 cannot flow back into the fixed pipe 803. The air in the insertion pipe 15 will be injected into the oil circuit of the oil cooler, and the air will enter the sealing pipe 14 through the oil circuit. After injecting air into the oil circuit for a period of time, the operation of air pump 6 is stopped. At this time, the reading of barometer 17 can be used to judge. If the reading of barometer 17 continues to decrease, it indicates that the oil circuit of the oil cooler has poor sealing. If the reading of barometer 17 does not change much and gradually stabilizes, it indicates that the oil circuit of the oil cooler has good sealing.

[0027] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An oil cooler airtightness testing device, comprising a working box (1), characterized in that: The inner wall of the working box (1) is fixedly connected to airbag one (2) and airbag two (3). The working box (1) is fixedly installed on the top of the working plate (5). An air pump (6) is fixedly installed on the top of the working plate (5). The air outlet of the air pump (6) is fixedly connected to and connected to the air distribution pipe (7). The air distribution pipe (7) injects air into the inflation component (4) and the detection component (8). After the inflation component (4) is inflated, the airbag one (2) and airbag two (3) inflate to clamp the oil cooler. After the detection component (8) is inflated, air is injected into the oil circuit of the oil cooler to detect the airtightness of the oil cooler.

2. The oil cooler airtightness testing device according to claim 1, characterized in that: The inflation assembly (4) includes an air tube (401), the middle of which is fixedly connected to and connected to a branch air tube (7), one end of which is fixedly connected to and connected to an electric valve (402), the electric valve (402) is fixedly connected to and connected to an air tube (403), the air tube (403) passes through the inside of the working box (1) and connects to an airbag (2), the other end of which is fixedly connected to and connected to an electric valve (404), the electric valve (404) is fixedly connected to and connected to an air tube (405), and the air tube (405) passes through the inside of the working box (1) and connects to an airbag (3).

3. The oil cooler airtightness testing device according to claim 2, characterized in that: A set of stabilizing seats (9) is fixedly installed on the outer wall of the second (403) and the third (405) respectively, and both sets of stabilizing seats (9) are fixedly installed on the top of the working plate (5).

4. The oil cooler airtightness testing device according to claim 1, characterized in that: Two sets of stabilizing seats (10) are fixedly installed on the outer wall of the gas distribution pipe (7), and both sets of stabilizing seats (10) are fixedly installed on the top of the working plate (5).

5. The oil cooler airtightness testing device according to claim 1, characterized in that: The top of the working plate (5) is fixedly installed with a support frame (11) by bolts. The top of the support frame (11) is fixedly installed with a hydraulic cylinder (12). The telescopic end of the hydraulic cylinder (12) slides through the inner side of the support frame (11) and is fixedly connected to the lifting plate (13). A sealing tube (14) and an insertion tube (15) are installed through the lifting plate (13). A set of rubber sleeves (16) are fixedly installed on the outer wall of the sealing tube (14) and the insertion tube (15). A barometer (17) is fixedly installed on the sealing tube (14) and the barometer (17) is used to detect the air pressure of the sealing tube (14).

6. The oil cooler airtightness testing device according to claim 5, characterized in that: The support frame (11) slides through four sets of guide rods (18) on its inner side, and the bottom of each of the four sets of guide rods (18) is fixedly connected to a lifting plate (13).

7. The oil cooler airtightness testing device according to claim 1, characterized in that: The detection component (8) includes an electric valve three (801), which is fixedly connected to and connected to the gas distribution pipe (7). The electric valve three (801) is fixedly connected to and connected to one end of the spring hose (802). The other end of the spring hose (802) is connected to one end of the fixed pipe (803). The other end of the fixed pipe (803) is connected to the insertion tube (15) through a one-way valve (804). A stabilizing seat three (805) is fixedly installed on the outer wall of the fixed pipe (803). The stabilizing seat three (805) is fixedly installed on the top of the lifting plate (13).

8. The oil cooler airtightness testing device according to claim 1, characterized in that: Two sets of horizontal plates (22) are fixedly installed on the inner wall of the work box (1). The bottom of the two sets of horizontal plates (22) are respectively fixedly connected to airbag one (2) and airbag two (3). Pressure sensor one (19) and pressure sensor two (20) are respectively installed in the mounting holes of the two sets of horizontal plates (22). Pressure sensor one (19) contacts airbag one (2), and pressure sensor two (20) contacts airbag two (3). Pressure sensor one (19) and pressure sensor two are connected to PLC controller (21) through wires. PLC controller (21) is fixedly installed on the top of the work plate (5). PLC controller (21) is connected to air pump (6) through contactor. PLC controller (21) is connected to electric valve one (402), electric valve two (404) and electric valve three (801) through three sets of relays.

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