Oxygen sensor airtightness detection device

Abstract

The utility model belongs to the technical field of equipment detection devices, and discloses an oxygen sensor airtightness detection device which comprises a main board, a supporting frame and a detection mechanism are fixedly connected to the upper surface of the main board, the detection mechanism comprises a placement box, a second sealing plate is arranged at a groove of the placement box, airflow holes are formed in a placement groove and the second sealing plate, and the airflow holes are communicated with the airflow holes. A connecting plate is fixedly connected to the other end of the placement box, an air tightness detector is fixedly connected to the outer side of the connecting plate, an air cylinder is fixedly connected to the interior of the mounting box, the output end of the air cylinder is in transmission connection with a telescopic rod, and the other end of the telescopic rod is fixedly mounted on the upper surface of the second sealing plate. A to-be-detected oxygen sensor is placed in the placing groove, the air cylinder is used for driving the telescopic rod at the output end to move downwards, the lower end of the telescopic rod is fixedly connected to the upper surface of the second sealing plate, the second sealing plate seals the upper surface of the placing groove, and the first sealing plate and the second sealing plate are used in cooperation. And the overall airtightness detection effect of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment detection devices, and more specifically, to an oxygen sensor air tightness detection device. Background Art

[0002] The oxygen sensor is a key sensor used to control automobile exhaust emissions, reduce automobile pollution to the atmospheric environment, and improve the fuel combustion quality of automobile engines. Its main function is to detect the oxygen concentration in the exhaust and send a feedback signal to the ECU to control the fuel injection amount, thereby controlling the air-fuel ratio of the mixture near the theoretical value. The airtightness of the oxygen sensor plays a vital role in its use. The quality of its airtightness determines whether the oxygen sensor meets the use standards of the device.

[0003] Currently, the oxygen sensor air tightness detection devices on the market all detect whether the airtightness of the oxygen sensor meets the usage standards by supplying or exhausting gas. For example, a Chinese patent (publication authorization number CN210625975U) discloses an oxygen sensor air tightness detection device, which can effectively improve the air tightness test accuracy, reduce external interference with the test, avoid the situation where the test accuracy is affected by internal gas expansion, and reduce the usage limitations; it includes a test box, a standard box, an air pipeline, a valve, an oxygen sensor, a motor, a vacuum pump, and an exhaust pipe. The test box is provided with a test cavity inside, and an air outlet is provided at the left end of the circumferential outer wall of the test box, and the air outlet is connected to the test cavity. The standard box is provided with a standard cavity inside, and a detection hole is provided at the top of the standard box, and the detection head is located in the standard cavity of the standard box. A fixed plate is provided on the lower side of the left end of the standard box, and the motor and the vacuum pump are fixedly installed on the top of the fixed plate, the output end of the motor is connected to the input end of the vacuum pump, the left end of the exhaust pipe is connected to the output end of the vacuum pump, and the right end of the exhaust pipe is connected to the air intake of the standard box.

[0004] Regarding the above-mentioned related technologies, the inventors believe that during the air tightness test of the oxygen sensor, a closed environment is usually created to realize the detection of the oxygen sensor. However, during the air tightness test, there may be air leakage in the sealing structure, which affects the overall air tightness detection effect of the device and there are certain experimental errors. Utility Model Content

[0005] In order to solve the above problems, the present application provides an oxygen sensor air tightness detection device.

[0006] The present application provides an oxygen sensor air tightness detection device that adopts the following technical solution:

[0007] The cam is provided with a support frame and a detection mechanism, the support frame is provided with two groups, the other end of which is fixedly connected to the mounting plate, the upper surface of the mounting plate is fixedly connected to the pneumatic cylinder, the output end of the pneumatic cylinder passes through the mounting plate to the other side thereof and is movably connected to the air supply pipe, the detection mechanism comprises a placement box, both sides of the placement box are provided with a first sealing plate, the placement box is provided with a placement groove, the groove of the placement box is provided with a second sealing plate, the interior of the placement groove and the second sealing plate are provided with air flow holes, the other end of the placement box is fixedly connected to a connecting plate, the outer side of the connecting plate is fixedly connected to an airtightness detector, the upper surface of the airtightness detector is fixedly connected to the mounting box, the interior of the mounting box is fixedly connected to the cylinder, the output end of the cylinder is transmission-connected to a telescopic rod, and the other end of the telescopic rod is fixedly mounted on the upper surface of the second sealing plate.

[0008] Furthermore, the lower surface of the mounting plate is fixedly connected to a support rod, and two groups of support rods are provided. The other end of the support rod is fixedly connected to a first limit plate, and the air pipe passes through the first limit plate and extends to a side close to the main board.

[0009] Through the above technical solution, the first limiting plate can be used to limit and fix the gas pipe, preventing the gas pipe from shaking during the ventilation process of the pneumatic cylinder and affecting the experimental process.

[0010] Furthermore, a support plate is fixedly connected to the upper surface of the placement box, a second limit plate is fixedly connected to the upper surface of the support plate, and the air pipe passes through the second limit plate and is connected to the air flow hole.

[0011] Through the above technical solution, the second limiting plate can be used to limit and fix the gas pipe, preventing the gas pipe from shaking during the ventilation process of the pneumatic cylinder, and the detection gas is transported through the air flow hole to the oxygen sensor to be tested placed inside the placement slot.

[0012] Furthermore, an airflow sensor is provided on one side of the second sealing plate close to the placement groove, and the airtightness detector is electrically connected to the airflow sensor.

[0013] Through the above technical solution, the oxygen sensor to be tested is placed in the placement groove, and then the cylinder is used to drive the telescopic rod at the output end to move downward. The lower end of the telescopic rod is fixedly connected to the upper surface of the second sealing plate, so that the second sealing plate seals the upper surface of the placement groove, creating a sealed environment, and then the air flow is transported to the interior of the oxygen sensor to be tested. If the air tightness of the oxygen sensor is insufficient, the air flow sensor on the inner wall of the placement groove will transmit the air flow signal to the air tightness tester to realize the air tightness test of the oxygen sensor.

[0014] Furthermore, the placement groove is adapted to the size of the tube body of the oxygen sensor to be tested.

[0015] Through the above technical solution, the placement groove is set to a size that is compatible with the tube body of the oxygen sensor to be tested, so that the oxygen sensor can be placed in the placement groove for air tightness testing.

[0016] Furthermore, a controller is fixedly connected to the outer side of the support frame, and the controller is electrically connected to the pneumatic cylinder, the air tightness detector, the cylinder and the airflow sensor.

[0017] Through the above technical solution, the electrical connection between the controller and the pneumatic cylinder, the air tightness detector, the cylinder and the air flow sensor is utilized to control the overall operation of the equipment.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] The oxygen sensor to be tested is placed in the placement groove, and the cylinder is used to drive the telescopic rod at the output end to move downward. The lower end of the telescopic rod is fixedly connected to the upper surface of the second sealing plate, so that the second sealing plate seals the upper surface of the placement groove. The first sealing plate and the second sealing plate are used in conjunction to create a sealed environment, which to a certain extent reduces the possibility of air leakage in the sealing structure during the experiment and improves the overall airtightness detection effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an oxygen sensor air tightness detection device;

[0021] Figure 2 This is a top view of the structure of an oxygen sensor air tightness detection device;

[0022] Figure 3 This is a schematic diagram of the position relationship between the cylinder and the mounting box in this application;

[0023] Figure 4 This is a schematic diagram of the position relationship between the support plate and the placement slot in this application.

[0024] Description of the numbers in the figure:

[0025] 1. Main board; 2. Support frame; 3. Detection mechanism; 4. Mounting plate; 5. Pneumatic cylinder; 6. Air pipe; 7. Placement box; 8. First sealing plate; 9. Placement slot; 10. Second sealing plate; 11. Air flow hole; 12. Connecting plate; 13. Air tightness detector; 14. Mounting box; 15. Cylinder; 16. Telescopic rod; 17. Support rod; 18. First limit plate; 19. Support plate; 20. Second limit plate; 21. Controller. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0029] Example 1:

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The present application discloses an oxygen sensor air tightness detection device. Figure 1, including a main board 1, the upper surface of the main board 1 is fixedly connected to a support frame 2 and a detection mechanism 3, the support frame 2 is provided with two groups, the other end of which is fixedly connected to a mounting plate 4, the upper surface of the mounting plate 4 is fixedly connected to a pneumatic cylinder 5, the output end of the pneumatic cylinder 5 passes through the mounting plate 4 to the other side thereof and is movably connected to an air supply pipe 6, the detection mechanism 3 includes a placement box 7, both sides of the placement box 7 are provided with a first sealing plate 8, the placement box 7 is provided with a placement groove 9, and a second sealing plate 10 is provided at the groove of the placement box 7, and air flow holes 11 are provided inside the placement groove 9 and the second sealing plate 10, the other end of the placement box 7 is fixedly connected to a connecting plate 12, the outer side of the connecting plate 12 is fixedly connected to an air tightness detector 13, the upper surface of the air tightness detector 13 is fixedly connected to a mounting box 14, the interior of the mounting box 14 is fixedly connected to a cylinder 15, the output end of the cylinder 15 is transmission-connected to a telescopic rod 16, and the other end of the telescopic rod 16 is fixedly mounted on the upper surface of the second sealing plate 10.

[0032] The lower surface of the mounting plate 4 is fixedly connected to a support rod 17, and two groups of support rods 17 are provided. The other end of the support rod 17 is fixedly connected to a first limit plate 18. The air pipe 6 passes through the first limit plate 18 and extends to a side close to the main board 1. The first limit plate 18 can be used to limit and fix the air pipe 6 to prevent the air pipe 6 from shaking during the ventilation process of the pneumatic cylinder 5, which affects the experimental progress.

[0033] A support plate 19 is fixedly connected to the upper surface of the placement box 7, and a second limit plate 20 is fixedly connected to the upper surface of the support plate 19. The gas pipe 6 passes through the second limit plate 20 and is connected to the air flow hole 11. The second limit plate can be used to limit and fix the gas pipe 6 to prevent the gas pipe 6 from shaking during the ventilation process of the pneumatic cylinder 5. The detection gas is transported through the air flow hole 11 to the oxygen sensor to be detected placed inside the placement slot 9.

[0034] An airflow sensor is provided on one side of the second sealing plate 10 close to the placement groove 9. The airtightness detector 13 is electrically connected to the airflow sensor. The oxygen sensor to be tested is placed in the placement groove 9, and then the cylinder 15 is used to drive the telescopic rod 16 at the output end to move downward. The lower end of the telescopic rod 16 is fixedly connected to the upper surface of the second sealing plate 10, so that the second sealing plate 10 seals the upper surface of the placement groove 9 to create a sealed environment, and then transports the airflow to the interior of the oxygen sensor to be tested. If the airtightness of the oxygen sensor is insufficient, the airflow sensor on the inner wall of the placement groove 9 will transmit the airflow signal to the airtightness detector 13 to realize the airtightness detection of the oxygen sensor.

[0035] The placement groove 9 is adapted to the size of the tube body of the oxygen sensor to be tested. The placement groove 9 is set to a size that is adapted to the tube body of the oxygen sensor to be tested, and the oxygen sensor can be placed in the placement groove 9 for air tightness testing.

[0036] A controller 21 is fixedly connected to the outside of the support frame 2. The controller 21 is electrically connected to the pneumatic cylinder 5, the air tightness detector 13, the cylinder 15 and the air flow sensor. The electrical connection between the controller 21 and the pneumatic cylinder 5, the air tightness detector 13, the cylinder 15 and the air flow sensor is utilized to control the overall operation of the equipment.

[0037] The implementation principle of an oxygen sensor air tightness detection device in an embodiment of the present application is as follows: the oxygen sensor to be detected is placed in the placement groove 9, and then the cylinder 15 is used to drive the telescopic rod 16 at the output end to move downward. The lower end of the telescopic rod 16 is fixedly connected to the upper surface of the second sealing plate 10, so that the second sealing plate 10 seals the upper surface of the placement groove 9. Through the coordinated use of the first sealing plate 8 and the second sealing plate 10, a sealed environment is created inside the placement groove 9, and then the air flow is delivered to the interior of the oxygen sensor to be detected by the pneumatic cylinder 5. If the air tightness of the oxygen sensor is insufficient, the air flow sensor on the inner wall of the placement groove 9 will transmit the air flow signal to the air tightness detector 13 to realize the air tightness detection of the oxygen sensor.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An oxygen sensor air tightness detection device, comprising a main board (1), characterized in that: The upper surface of the main board (1) is fixedly connected to a support frame (2) and a detection mechanism (3); the support frame (2) is provided with two groups of mounting plates (4) fixedly connected to the other end thereof; the upper surface of the mounting plate (4) is fixedly connected to a pneumatic cylinder (5); the output end of the pneumatic cylinder (5) passes through the mounting plate (4) to the other side thereof and is movably connected to an air supply pipe (6); the detection mechanism (3) includes a placement box (7); both sides of the placement box (7) are provided with a first sealing plate (8); the placement box (7) is provided with a placement groove (9); the groove of the placement box (7) is provided with a second sealing plate (9); The plate (10) is provided with air flow holes (11) inside the placement groove (9) and the second sealing plate (10), the other end of the placement box (7) is fixedly connected to a connecting plate (12), the outer side of the connecting plate (12) is fixedly connected to an air tightness detector (13), the upper surface of the air tightness detector (13) is fixedly connected to an installation box (14), the interior of the installation box (14) is fixedly connected to a cylinder (15), the output end of the cylinder (15) is transmission-connected to a telescopic rod (16), and the other end of the telescopic rod (16) is fixedly installed on the upper surface of the second sealing plate (10).

2. The oxygen sensor air tightness detection device according to claim 1, characterized in that: The lower surface of the mounting plate (4) is fixedly connected to a support rod (17), and two groups of the support rods (17) are provided. The other end of the support rod (17) is fixedly connected to a first limiting plate (18), and the air supply pipe (6) passes through the first limiting plate (18) and extends to a side close to the main board (1).

3. The oxygen sensor air tightness detection device according to claim 1, characterized in that: The upper surface of the placement box (7) is fixedly connected to a support plate (19), the upper surface of the support plate (19) is fixedly connected to a second limit plate (20), and the air delivery pipe (6) passes through the second limit plate (20) and is connected to the air flow hole (11).

4. The oxygen sensor air tightness detection device according to claim 1, characterized in that: An airflow sensor is provided on one side of the second sealing plate (10) close to the placement groove (9), and the airtightness detector (13) is electrically connected to the airflow sensor.

5. The oxygen sensor air tightness detection device according to claim 1, characterized in that: The placement groove (9) is adapted to the size of the tube body of the oxygen sensor to be tested.

6. The oxygen sensor air tightness detection device according to claim 1, characterized in that: A controller (21) is fixedly connected to the outer side of the support frame (2), and the controller (21) is electrically connected to the pneumatic cylinder (5), the air tightness detector (13), the cylinder (15) and the air flow sensor.

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