An airtightness detection device

Abstract

This utility model discloses an airtightness detection device, belonging to the field of air leakage detection technology. The device includes a base plate, a detection box fixedly mounted on the base plate, a workpiece to be tested disposed inside the detection box, a top plate disposed above the detection box, a direct-flow air pressure valve fixedly mounted on the top plate, an air pressure gauge fixedly mounted on the top plate, and a push-out mechanism disposed inside the detection box for convenient removal of the workpiece. Through the coordinated use of these devices, and with the push-out mechanism, after the test is completed, an electric push rod is activated. The output shaft of the electric push rod drives the top plate upward, which in turn drives a first connecting rod upward. The first connecting rod drives a second connecting rod to move synchronously, and the second connecting rod pushes a placement plate to move. The placement plate then moves the workpiece to be tested out of the detection box, facilitating the user to remove the workpiece and replace it with a new one for testing, thereby improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of air leakage detection technology, specifically an airtightness detection device. Background Technology

[0002] Automotive radar is an important component of a car, mainly used to enable functions such as obstacle detection, collision prediction, and automatic cruise control. Since the driving environment includes high humidity and high moisture content, automotive components usually need to have good airtight performance to prevent rainwater from seeping into the interior of the component through the outer shell, thereby causing component failure and affecting driving safety.

[0003] An investigation revealed that a Chinese utility model patent discloses an airtightness testing device (publication number: CN220960498U), comprising a lower seal, guide screws, an upper seal, and a pressing component; a plurality of guide screws are arranged circumferentially on the lower seal; the upper seal is fitted between the outer sides of the plurality of guide screws and can slide vertically along the guide screws, and the upper seal is provided with a direct-flow air pressure valve and an air pressure gauge; the workpiece to be tested is pressed between the upper seal and the opposite side of the lower seal.

[0004] In the aforementioned patent, the upper seal is vertically guided by a guide screw, and then pressed and locked downwards by a pressing component. This allows for pressing and sealing of both ends of different workpieces, improving interchangeability. A direct-flow air pressure valve is used to introduce air into the compression space, and the change in the air pressure gauge reading is observed to determine whether the workpiece is leaking. This facilitates the testing of different workpieces with a single set of testing equipment. However, after the workpiece is tested, it is inconvenient to remove it, and the operation is cumbersome, affecting testing efficiency.

[0005] Therefore, this utility model provides an airtightness detection device to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides an airtightness detection device, which aims to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: an airtightness testing device, comprising a base plate, a testing box fixedly mounted on the base plate, a workpiece to be tested disposed inside the testing box, a top plate disposed above the testing box, a direct-flow air pressure valve fixedly mounted on the top plate, an air pressure gauge fixedly mounted on the top plate, and a push-out mechanism disposed inside the testing box for facilitating the removal of the workpiece to be tested.

[0010] The ejection mechanism includes an electric push rod fixedly installed on the base plate, a placement plate disposed inside the detection box, a first connecting rod hinged to the bottom of the top plate, a second connecting rod hinged to the placement plate, and a limiting rod fixedly installed inside the detection box.

[0011] As a preferred technical solution of this application, the movable end of the electric push rod is fixedly connected to the bottom of the top plate, the bottom of the detection box is in contact with the top of the placement plate, the end of the first connecting rod away from the top plate is rotatably connected to the end of the second connecting rod away from the placement plate, and the limiting rod passes through the placement plate.

[0012] As a preferred technical solution of this application, the placement plate is fixedly connected to both sides of the fixing block, and two rollers are rotatably connected inside the fixing block. The side surfaces of the two rollers are in contact with the side surfaces of the limiting rod, and the two rollers are arranged on both sides of the limiting rod.

[0013] As a preferred technical solution of this application, a vertical plate is fixedly connected to the top of the placement plate, a sliding rod is slidably connected inside the vertical plate, and a clamping plate is fixedly connected to one end of the sliding rod.

[0014] As a preferred technical solution of this application, one side of the clamping plate is in contact with one side of the workpiece being measured, and a baffle is fixedly connected to the end of the slide rod away from the clamping plate.

[0015] As a preferred technical solution of this application, a tension spring is sleeved on the side surface of the slide rod, one end of the tension spring is fixedly connected to one side of the upright plate, and the other end of the tension spring is fixedly connected to one side of the baffle.

[0016] (III) Beneficial Effects

[0017] This utility model has a simple structure and is easy to use. With the setting of the ejection mechanism, after the test is completed, the electric push rod is activated. The output shaft of the electric push rod drives the top plate to move upward. The top plate drives the first connecting rod to move upward. The first connecting rod drives the second connecting rod to move synchronously. The second connecting rod pushes the placement plate to move. The placement plate moves the workpiece being tested out of the test box, which makes it easy for the user to remove the workpiece and replace it with a new workpiece for testing, thereby improving the testing efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of an airtightness detection device. Figure 1 ;

[0019] Figure 2 A schematic cross-section of the testing chamber in an airtightness testing device. Figure 1 ;

[0020] Figure 3 A schematic diagram of the structure of an airtightness detection device. Figure 2 ;

[0021] Figure 4 A schematic cross-section of the testing chamber in an airtightness testing device. Figure 2 ;

[0022] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the installation of a tension spring in an airtightness testing device.

[0024] In the picture:

[0025] 1. Base plate; 2. Testing box; 3. Workpiece to be tested; 4. Top plate; 5. Straight-through air pressure valve; 6. Air pressure gauge; 7. Electric push rod; 8. Placement plate; 9. First connecting rod; 10. Second connecting rod; 11. Limiting rod; 12. Fixing block; 13. Roller; 14. Vertical plate; 15. Slide rod; 16. Clamping plate; 17. Tension spring; 18. Baffle. Detailed Implementation

[0026] 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.

[0027] This utility model provides an airtightness detection device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the airtightness testing device includes a base plate 1, a testing box 2 fixedly installed on the base plate 1, a workpiece 3 to be tested inside the testing box 2, a top plate 4 above the testing box 2, a direct-flow air pressure valve 5 fixedly installed on the top plate 4, an air pressure gauge 6 fixedly installed on the top plate 4, and a push-out mechanism installed inside the testing box 2 for easy removal of the workpiece 3 to be tested.

[0028] The ejection mechanism includes an electric push rod 7 fixedly mounted on the base plate 1, a placement plate 8 disposed inside the detection box 2, a first connecting rod 9 hinged to the bottom of the top plate 4, a second connecting rod 10 hinged to the placement plate 8, and a limiting rod 11 fixedly mounted inside the detection box 2.

[0029] The movable end of the electric push rod 7 is fixedly connected to the bottom of the top plate 4, the bottom of the detection box 2 is in contact with the top of the placement plate 8, the end of the first connecting rod 9 away from the top plate 4 is rotatably connected to the end of the second connecting rod 10 away from the placement plate 8, and the limiting rod 11 passes through the placement plate 8.

[0030] When using this airtightness testing device, first place the base plate 1 in a suitable position. Then, the user places the workpiece 3 to be tested on top of the placement plate 8. Next, the user activates the electric push rod 7 via the external controller. The output shaft of the electric push rod 7 drives the top plate 4 downwards. The top plate 4 drives the first connecting rod 9 downwards, which in turn drives the second connecting rod 10 to move closer together. The second connecting rod 10 then moves the placement plate 8, which in turn moves the workpiece 3 into the testing chamber 2. Gas is then introduced into the testing chamber 2 through the direct-flow air pressure valve 5. The pressure gauge 6 monitors the gas pressure inside the testing chamber 2. When the gas pressure inside the testing chamber 2 reaches the preset value, the direct-flow air pressure valve is closed. Valve 5, then observe the value of the pressure gauge 6. If the value of the pressure gauge 6 does not change within the preset time, it indicates that the airtightness of the tested workpiece 3 is good. If the value of the pressure gauge 6 changes within the preset time, it indicates that the airtightness of the tested workpiece 3 is poor. After the test is completed, start the electric push rod 7. The output shaft of the electric push rod 7 drives the top plate 4 to move upward. The top plate 4 drives the first connecting rod 9 to move upward. The first connecting rod 9 drives the second connecting rod 10 to move to the side away from each other. The second connecting rod 10 drives the placement plate 8 to move. The placement plate 8 moves the tested workpiece 3 out of the interior of the test box 2, which makes it convenient for the user to remove the tested workpiece 3 and replace it with another tested workpiece 3 for testing, thus improving the testing efficiency.

[0031] Furthermore, to make the lifting and lowering of the placement plate 8 even smoother, such as Figure 1 , Figure 2 and Figure 6As shown, fixing blocks 12 are fixedly connected to both sides of the placement plate 8. Two rollers 13 are rotatably connected inside the fixing blocks 12. The side surfaces of the two rollers 13 are in contact with the side surfaces of the limiting rod 11. The two rollers 13 are arranged on both sides of the limiting rod 11.

[0032] When the airtightness testing device is in use, the roller 13 rolls along the side surface of the limit rod 11 during the lifting process, which reduces the friction between the fixed block 12 and the limit rod 11, making the placement plate 8 more stable during lifting and lowering, and reducing energy consumption. At the same time, the roller 13 can also guide the lifting and lowering of the placement plate 8, ensuring that the placement plate 8 will not deviate during the lifting and lowering process, further improving the accuracy of the test.

[0033] In order to facilitate the airtightness testing of workpieces 3 of different sizes, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, a vertical plate 14 is fixedly connected to the top of the placement plate 8, and a sliding rod 15 is slidably connected inside the vertical plate 14. A clamping plate 16 is fixedly connected to one end of the sliding rod 15.

[0034] One side of the clamping plate 16 is in contact with one side of the workpiece 3 being measured, and a baffle 18 is fixedly connected to the end of the slide rod 15 away from the clamping plate 16.

[0035] A tension spring 17 is fitted on the side surface of the slide rod 15. One end of the tension spring 17 is fixedly connected to one side of the upright plate 14, and the other end of the tension spring 17 is fixedly connected to one side of the baffle 18.

[0036] When using this airtightness testing device, if it is necessary to clamp workpieces 3 of different sizes, the user can pull the baffle 18. The baffle 18 drives the slide rod 15 to slide inside the upright plate 14. The slide rod 15 drives the clamping plate 16 to move. The tension spring 17 is stretched and deformed. At this time, the user can place the workpiece 3 on the top of the placement plate 8, and then release the baffle 18. The tension spring 17 drives the baffle 18 to reset under its own elastic force. The baffle 18 drives the slide rod 15 to reset. The slide rod 15 drives the clamping plate 16 to clamp the workpiece 3, thus facilitating the fixing of workpieces 3 of different sizes and improving the practicality of the airtightness testing device.

[0037] 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. An air tightness detection apparatus, characterized by: The airtightness testing device includes a base plate (1), a testing box (2) fixedly installed on the base plate (1), a workpiece (3) to be tested inside the testing box (2), a top plate (4) above the testing box (2), a direct-flow air pressure valve (5) fixedly installed on the top plate (4), an air pressure gauge (6) fixedly installed on the top plate (4), and a push-out mechanism inside the testing box (2) for facilitating the removal of the workpiece (3). The ejection mechanism includes an electric push rod (7) fixedly installed on the base plate (1), a placement plate (8) disposed inside the detection box (2), a first connecting rod (9) hinged to the bottom of the top plate (4), a second connecting rod (10) hinged to the placement plate (8), and a limiting rod (11) fixedly installed inside the detection box (2).

2. A leak detection apparatus as claimed in claim 1, wherein: The movable end of the electric push rod (7) is fixedly connected to the bottom of the top plate (4), the bottom of the detection box (2) is in contact with the top of the placement plate (8), the end of the first connecting rod (9) away from the top plate (4) is rotatably connected to the end of the second connecting rod (10) away from the placement plate (8), and the limiting rod (11) passes through the placement plate (8).

3. The airtightness detection device according to claim 1, characterized in that: The placement plate (8) is fixedly connected to two sides by fixing blocks (12), and two rollers (13) are rotatably connected inside the fixing blocks (12). The side surfaces of the two rollers (13) are in contact with the side surfaces of the limiting rod (11), and the two rollers (13) are arranged on both sides of the limiting rod (11).

4. The airtightness detection device according to claim 1, characterized in that: The top of the placement plate (8) is fixedly connected to a vertical plate (14), and a sliding rod (15) is slidably connected inside the vertical plate (14). One end of the sliding rod (15) is fixedly connected to a clamping plate (16).

5. The airtightness detection device according to claim 4, characterized in that: One side of the clamping plate (16) is in contact with one side of the workpiece (3) being measured, and a baffle (18) is fixedly connected to one end of the slide rod (15) away from the clamping plate (16).

6. The airtightness detection device according to claim 5, characterized in that: A tension spring (17) is sleeved on the side surface of the slide rod (15). One end of the tension spring (17) is fixedly connected to one side of the upright plate (14), and the other end of the tension spring (17) is fixedly connected to one side of the baffle (18).

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