Device for detecting air tightness of part by using bubble method

Abstract

The utility model provides a bubble method part air tightness detection device, comprising a water tank and a slide bar, two ends of the water tank are fixedly provided with cylinders, output ends of the two cylinders are vertically and upwardly provided with a top plate, and the bottom of the top plate is symmetrically and slidably provided with slide plates. The top plate is further provided with a driving assembly for driving the two sliding plates to move in the direction close to each other or away from each other, mounting grooves are formed in the opposite sides of the two sliding plates, the two sliding rods are horizontally erected between the two sliding plates through the mounting grooves, and the two ends of each sliding rod are movably connected with the corresponding mounting grooves. The two side walls of each sliding plate are each provided with an adjusting assembly for adjusting the distance between the two sliding rods, and the problem that in the prior art, when a part enters a water body, bubbles are generated after turbulent flow is formed in the water body to interfere detection personnel, and consequently airtightness detection of the part is not accurate enough is solved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing device for parts using the bubble method. Background Technology

[0002] The bubble test is mainly used to test the airtightness of parts. It is widely used in automobile manufacturing, aerospace, home appliances and other fields. In these industries, airtightness is crucial, especially for automobile engines, fuel lines, cylinders and doors. Poor airtightness can lead to liquid or gas leakage, which can cause safety hazards. The traditional bubble test involves immersing the parts to be tested in water, applying a certain pressure and observing whether bubbles emerge from the parts.

[0003] Currently, when inspecting components, the components are usually fixed in place by a connector or platform and then lowered into the water. As soon as the components enter the water, the water flow and direction change drastically, creating turbulence. This turbulence carries air, causing regular bubbles to form in the water. These bubbles can be confused with bubbles from actual leaks, making it difficult to distinguish between false bubbles caused by water turbulence and bubbles caused by component leaks. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a bubble method for testing the air tightness of parts. It solves the problem that when parts enter water, turbulence is generated in the water, producing bubbles that interfere with the testing personnel, resulting in inaccurate air tightness testing of the parts.

[0005] According to an embodiment of this utility model, a bubble method for testing the air tightness of parts includes a water tank and sliding rods. Cylinders are fixedly installed at both ends of the water tank. A top plate is vertically mounted on the output ends of the two cylinders. Slide plates are symmetrically and slidably installed at the bottom of the top plate. A drive assembly is also provided on the top plate to drive the two slide plates to move closer to or further away from each other. Mounting grooves are provided on the opposite sides of the two slide plates. Two sliding rods are horizontally mounted between the two slide plates through the mounting grooves, and both ends of the sliding rods are movably connected to the corresponding mounting grooves. Adjustment components for adjusting the distance between the two sliding rods are provided on both sides of each slide plate.

[0006] Compared with the prior art, this utility model has the following beneficial effects: by symmetrically setting sliding plates at the bottom of the top plate, the drive component adjusts the spacing of the sliding plates to accommodate parts of different lengths. Then, by setting sliding rods between the two sliding plates, the adjustment component adjusts the spacing between the two sliding rods to accommodate parts of different sizes, so that the parts can be tilted and locked between the two sliding rods. This reduces the disturbance to the water when the parts enter the water, avoids the formation of bubbles after turbulence in the water, and makes it easier for the generated bubbles to rise along the surface of the parts, preventing them from adhering to the surface of the parts and interfering with the testers' judgment of airtightness, thereby improving the accuracy of airtightness testing of parts.

[0007] Furthermore, each adjustment component includes: a screw, which is threadedly connected to the slide plate, with one end of the screw horizontally inserted into the mounting groove, and the other end of the screw having a handle.

[0008] Furthermore, several placement columns are spaced apart on the opposite sides of both sliding plates.

[0009] Furthermore, the drive assembly includes: a bidirectional lead screw, a groove is provided at the bottom of the top plate, the bidirectional lead screw is horizontally and rotatably disposed in the groove, the two ends of the bidirectional lead screw are respectively threaded to two slide plates, and a motor is provided to drive the rotation of one end of the bidirectional lead screw after it extends out of the groove.

[0010] Furthermore, each slide is equipped with a flow stabilizer at the bottom, and the flow stabilizer has an inverted triangular cross-section.

[0011] Furthermore, the water tank is also equipped with a flow stabilizer plate, which is horizontally and fixedly installed inside the water tank, and has several through holes.

[0012] Furthermore, an overflow channel is provided on the inner wall of the water tank.

[0013] Furthermore, an insulating rubber pad is installed at the bottom of the water tank. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 This is a front view of an embodiment of the present utility model.

[0016] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 4 This is a longitudinal sectional view of an embodiment of the present utility model.

[0018] In the above attached diagram: 1. Water tank; 2. Cylinder; 3. Top plate; 4. Slide plate; 5. Slide rod; 6. Screw; 7. Placement column; 8. Two-way lead screw; 9. Motor; 10. Flow stabilizer block; 11. Flow stabilizer plate; 12. Overflow groove; 13. Isolation pad. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown in Figure 3, this utility model embodiment proposes a bubble method for testing the air tightness of parts, including a water tank 1 and sliding rods 5. Cylinders 2 are fixedly installed at both ends of the water tank 1. A top plate 3 is vertically mounted on the output end of the two cylinders 2. Slide plates 4 are symmetrically and slidably installed at the bottom of the top plate 3. A drive assembly is also provided on the top plate 3 to drive the two slide plates 4 to move closer to or further away from each other. Mounting grooves are opened on the opposite sides of the two slide plates 4. Two sliding rods 5 are horizontally mounted between the two slide plates 4 through the mounting grooves, and both ends of the sliding rods 5 are movably connected to the corresponding mounting grooves. Adjustment components for adjusting the distance between the two sliding rods 5 are provided on both sides of each slide plate 4. Water tank 1 is pre-filled with water. When performing airtightness testing on the parts, depending on the size of the parts, the drive assembly is first activated. The drive assembly moves the two sliding plates 4 so that the distance between the two sliding plates 4 is slightly larger than the length of the parts to be tested. Then, a sliding rod 5 of appropriate length is selected and placed between the two sliding grooves. Preferably, the sliding rod 5 is a telescopic rod, which can be easily adjusted in length as needed. Then, the adjustment assembly is turned to adjust the distance between the two sliding rods 5 so that the parts to be tested can be tilted and locked between the two sliding rods 5. After the parts are locked between the two sliding rods 5, the two cylinders 2 are activated. 2. Drive the top plate 3 downwards, allowing the part to enter the water in the water tank 1. The inspector can then determine whether there is a leak by observing whether bubbles are generated on the surface of the part. Since the part is placed at an angle, when the part enters the water, the water will flow along the surface of the part, making it easier for the part to make smooth contact with the water. This reduces the possibility of the part being violently impacted by the water and causing turbulence. Furthermore, the bubbles can rise along the surface of the part, thereby reducing the chance of bubbles being trapped on the surface or in the gaps of the part, and improving the accuracy of the airtightness test of the part.

[0021] like Figure 1-3As shown, each adjustment component further includes a screw 6, which is threadedly connected to the slide plate 4. One end of the screw 6 is horizontally inserted into the mounting groove, and the other end of the screw 6 is provided with a handle. Specifically, in this embodiment, each slide plate 4 has screws 6 threadedly connected to both sides. Each screw 6 is set perpendicularly to the slide rod 5. When adjusting the distance between the two slide rods 5, the screw 6 is rotated by the handle, causing the screw 6 to screw into or out of the mounting groove, thereby pushing the two slide rods 5 to move. The distance between the ends of the two screws 6 on the same slide plate 4 is the maximum range of movement between the slide rods 5. When a part is tilted and locked between the two slide rods 5, the two slide rods 5 will move toward the screws 6 on both sides respectively, and the screws 6 limit their movement.

[0022] like Figure 1-4 As shown, furthermore, several placement posts 7 are spaced apart on the opposite sides of both sliding plates 4. Specifically, the placement posts 7 on the same sliding plate 4 are equally spaced. When it is not necessary to tilt the part for airtightness testing, the slide bar 5 can be removed. The slide bar 5 can be a telescopic rod or a slide bar 5 tilted in the horizontal direction to remove the slide bar 5. At this time, both ends of the part can be placed directly flat on the placement posts 7. The placement posts 7 are spaced apart, which allows the part to be placed stably on them while reducing the contact area between the parts and the posts, thus improving the accuracy of the test results.

[0023] like Figure 3-4 As shown, the drive assembly further includes a bidirectional lead screw 8. A groove is provided at the bottom of the top plate 3. The bidirectional lead screw 8 is horizontally and rotatably mounted within the groove. Both ends of the bidirectional lead screw 8 are threadedly connected to two sliding plates 4. One end of the bidirectional lead screw 8 extends out of the groove and is equipped with a motor 9 that drives its rotation. Specifically, the motor 9 is fixedly mounted at the end of the top plate 3. The output end of the motor 9 is fixedly connected to the bidirectional lead screw 8. When adjusting the distance between the two sliding plates 4, the motor 9 is started, causing the bidirectional lead screw 8 to rotate. The bidirectional lead screw 8 then drives the sliding plates 4 threadedly connected to it to move closer to or further away from each other, thereby changing the distance between the two sliding plates 4. This facilitates the placement of parts of different lengths between the two sliding plates 4 for airtightness testing.

[0024] like Figure 2-4 As shown, each slide plate 4 is further provided with a flow stabilizer 10 at its bottom, and the cross-section of the flow stabilizer 10 is an inverted triangular structure. Since the bottom of the slide plate 4 is flat, water flow separation is likely to occur when the slide plate 4 enters the water in the water tank 1, generating eddies and air stagnation, thus forming bubbles. This affects the inspection personnel's ability to observe the parts when bubbles are generated. The flow stabilizer 10 is in the shape of an inverted triangle and is set at the bottom of the slide plate 4, so that when the slide plate 4 enters the water in the water tank 1, it guides the water flow to bypass the slide plate 4 more smoothly, thereby reducing the bubbles generated by violent water flow collisions or turbulence, and thus reducing the interference of bubbles generated by external factors on the inspection personnel.

[0025] like Figure 1 , 3 As shown in Figure 4, furthermore, a flow stabilizer 11 is provided inside the water tank 1. The flow stabilizer 11 is horizontally and fixedly installed inside the water tank 1, and several through holes are opened on the flow stabilizer 11. Specifically, due to the influence of water flow in the water tank 1 and external vibrations, turbulence may be formed at the bottom of the water tank 1. The irregular movement of these water flows may interfere with the generation and rise of bubbles. By setting the flow stabilizer 11 with through holes inside the water tank 1, the water flow is restricted to a certain speed range through these through holes, so that the water is slowed down before entering the upper water body, thereby slowing down the water flow and making the water body in the water tank 1 more stable. This achieves the effect of evenly dispersing the water flow and reducing the water flow turbulence caused by external disturbances.

[0026] like Figure 1 , 3 As shown in Figure 4, an overflow groove 12 is further provided on the inner wall of the water tank 1. When the parts are placed into the water, if too much water enters the water tank 1, it will cause water to overflow and affect the surrounding environment. At the same time, the waves generated when the parts are placed into the water enter the overflow groove 12, thereby reducing the reflection of the waves when they hit the inner wall of the water tank 1, and thus reducing the interference of the parts into the water. Preferably, a drain pipe can be connected to the overflow groove 12 to facilitate the drainage of the water inside.

[0027] like Figure 1-4 As shown, furthermore, an isolation pad 13 is provided at the bottom of the water tank 1. When fixing this device, extension plates can be provided on both sides of the water tank 1 and then fixed with bolts. The isolation pad 13 is located between the ground surface and the bottom of the water tank. The isolation pad 13 can play a buffering role, reducing the impact of external vibration on this device and reducing the vibration generated when this device is working.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for testing the airtightness of parts using the bubble method, characterized in that, include: Water tank (1), cylinders (2) are fixed at both ends of the water tank (1), and a top plate (3) is mounted vertically upward at the output end of the two cylinders (2). The bottom of the top plate (3) is symmetrically and slidably equipped with a sliding plate (4). The top plate (3) is also equipped with a drive component that drives the two sliding plates (4) to move towards each other or away from each other. The sliding rod (5) and the two sliding plates (4) are provided with mounting slots on opposite sides. The two sliding rods (5) are horizontally mounted between the two sliding plates (4) through the mounting slots and both ends of the sliding rods (5) are movably connected to the corresponding mounting slots. Each sliding plate (4) is provided with an adjustment component on both sides to adjust the distance between the two sliding rods (5).

2. The bubble-method airtightness testing device for parts as described in claim 1, characterized in that, Each adjustment component includes: a screw (6), which is threadedly connected to the slide plate (4), one end of the screw (6) is horizontally inserted into the mounting groove, and the other end of the screw (6) is provided with a handle.

3. The airtightness testing device for parts using the bubble method as described in claim 2, characterized in that: Several placement columns (7) are provided at intervals on the opposite sides of the two sliding plates (4).

4. The bubble method airtightness testing device for parts as described in claim 1, characterized in that, The drive assembly includes: a two-way lead screw (8), a groove is provided at the bottom of the top plate (3), the two-way lead screw (8) is horizontally and rotatably set in the groove, the two ends of the two-way lead screw (8) are threadedly connected to the two slide plates (4) respectively, and a motor (9) is provided to drive the rotation of the two-way lead screw (8) after one end extends out of the groove.

5. The airtightness testing device for parts using the bubble method as described in claim 1, characterized in that: Each slide (4) has a flow stabilizer (10) at the bottom, and the cross-section of the flow stabilizer (10) is an inverted triangle structure.

6. The bubble method airtightness testing device for parts as described in claim 1, characterized in that: The water tank (1) is also equipped with a flow stabilizer plate (11), which is horizontally and fixedly installed inside the water tank (1), and has several through holes.

7. The bubble method airtightness testing device for parts as described in claim 1, characterized in that: An overflow groove (12) is provided on the inner wall of the water tank (1).

8. The bubble method airtightness testing device for parts as described in claim 1, characterized in that: An isolation pad (13) is provided at the bottom of the water tank (1).

Images