Air tightness detection equipment

Abstract

The utility model belongs to the technical field of air tightness detection, and particularly relates to air tightness detection equipment which comprises a shell. A to-be-detected product is manually placed above the sealing layer, the control switch is pressed, the air cylinder is started to drive the connecting plate to move through the L-shaped block, the connecting plate continues to drive the product to move upwards to make contact with the vertical pipe and press the vertical pipe tightly to form a closed space, the vacuumizing jig begins to exhaust air, and the sealing layer is sealed. When the negative pressure reaches a preset value, the vacuumizing jig stops exhausting air and enters a pressure maintaining stage, the pressure change in the closed space is observed through the observation cover, if the product leaks, the pressure in the closed space gradually rises, and if the product does not leak, the pressure is kept stable. Whether the product is qualified or not is judged, the detected product is manually taken down from the position above the sealing layer, discharging operation is completed, and therefore the efficiency of workers is improved, the probability of false detection is reduced, and the yield is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection technical field, concretely is airtightness detection equipment. BACKGROUND

[0002] Airtightness detection is the key link to ensure product quality and performance, and is widely used in automobile manufacturing, electronic product packaging, aerospace, medical devices and many other fields. At present, the airtightness detection method commonly used in the market mainly relies on manual operation. The basic process of this method is: the worker manually presses the product to be detected, then uses compressed air or other gas medium to inflate the product, and observes whether there is a bubble on the surface of the product to judge its airtightness performance.

[0003] However, this traditional manual detection method has many shortcomings. The process of manual pressing and visual observation is time-consuming, especially in a mass production environment, the detection speed is difficult to meet the needs of the production line, resulting in limited overall production efficiency, and the detection result depends largely on the experience and subjective judgment of the workers. The detection standards of different workers may differ, resulting in different judgment results for the same batch of products under different workers, thereby increasing the misjudgment rate. Due to the unreliability of manual detection, some qualified products may be eliminated due to misjudgment, and some unqualified products may flow into the market due to missed detection, which seriously affects the overall good product rate and brand image of the products. Therefore, we propose the airtightness detection equipment to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem solved

[0005] In view of the shortcomings of the prior art, the utility model provides airtightness detection equipment to solve the problems raised in the background art.

[0006] (II) Technical scheme

[0007] The utility model adopts the following technical scheme to achieve the above purpose:

[0008] An airtightness testing device includes a housing. An operation panel is located on the top of the housing. Two fixing plates are fixedly connected to the inner wall of the top of the housing. Two fixing ears are fixedly connected to one side of each fixing plate. A single cylinder is fixedly connected to the two fixing ears on the same side. An L-shaped block is fixedly connected to the output end of the cylinder. A single connecting plate is fixedly connected to the inner wall of the bottom of the two L-shaped blocks. A sealing layer is located above the connecting plate. Two guide pillars are fixedly connected to the top of the housing. A single positioning plate is fixedly connected to the top of the two guide pillars. An observation hood is located between the bottom of the positioning plate and the top of the operation panel. An air extraction connector is located at the top of the observation hood. A vertical pipe is connected to and fixed to the bottom of the operation panel. The end of the vertical pipe extends to the top of the operation panel and is connected to and fixed to the observation hood. Two T-shaped slide rails are fixedly connected to one side of each fixing plate. A slider is slidably connected to each T-shaped slide rail. One side of the slider is fixedly connected to one side of the connecting plate.

[0009] Furthermore, sealing plates are fixedly connected to both sides of the housing, and four levelers are fixedly connected to the bottom of the housing.

[0010] Furthermore, two hinges are fixedly connected to the rear side of the housing, and the same rear door is fixedly connected to the two hinges.

[0011] Furthermore, a control switch is provided on the top of the housing.

[0012] Furthermore, the slider has a sliding groove with openings on both sides, and the slider is slidably connected to the corresponding T-shaped slide rail through the sliding groove.

[0013] Furthermore, the observation cover is made of acrylic material.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides an airtightness testing device, which has the following beneficial effects:

[0016] This invention involves manually placing the product to be tested above the sealing layer, pressing a control switch, activating a cylinder that moves an L-shaped block upwards, causing a connecting plate to move upwards. The connecting plate continues to move the product upwards until it contacts and presses against a vertical pipe, forming a sealed space. A vacuum fixture then begins to evacuate air, gradually expelling the gas from the sealed space and creating a negative pressure environment. When the negative pressure reaches a preset value, the vacuum fixture stops evacuating and enters a pressure holding phase. Pressure changes within the sealed space are observed through an observation hood. During the pressure holding period, if there is a leak in the product, the pressure within the sealed space will gradually rise; if there is no leak, the pressure remains stable, determining whether the product is qualified. After the pressure holding time is up, the vacuum fixture automatically releases air, restoring the pressure within the sealed space to normal atmospheric pressure. The inspected product is then manually removed from above the sealing layer, completing the unloading operation. This improves worker efficiency, reduces the probability of false detections, and increases the yield rate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the cut-open three-dimensional structure of the shell of this utility model;

[0020] Figure 4 This is a partial three-dimensional structural diagram of the present invention;

[0021] Figure 5 This is a three-dimensional structural diagram of the connection between the fixing plate, T-shaped slide rail, slider and connecting plate of this utility model;

[0022] Figure 6 This utility model Figure 5 A schematic diagram of the tilted three-dimensional structure.

[0023] In the diagram: 1. Housing; 2. Control panel; 3. Fixing plate; 4. Fixing lug; 5. Cylinder; 6. L-shaped block; 7. Connecting plate; 8. Sealing layer; 9. Guide post; 10. Positioning plate; 11. Observation hood; 12. Air extraction connector; 13. Vertical pipe; 14. T-shaped slide rail; 15. Slider; 16. Sealing plate; 17. Leveler; 18. Hinge; 19. Control switch; 20. Rear door. Detailed Implementation

[0024] 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.

[0025] Example

[0026] like Figures 1-6 As shown, an embodiment of the airtightness testing device of this utility model includes a housing 1. An operation panel 2 is provided on the top of the housing 1. Two fixing plates 3 are fixedly connected to the inner wall of the top of the housing 1. Two fixing ears 4 are fixedly connected to one side of each fixing plate 3. A cylinder 5 is fixedly connected to the two fixing ears 4 on the same side. An L-shaped block 6 is fixedly connected to the output end of the cylinder 5. A connecting plate 7 is fixedly connected to the inner wall of the bottom of the two L-shaped blocks 6. A sealing layer 8 is provided above the connecting plate 7. Two guide posts 9 are fixedly connected to the top of the housing 1. The tops of the two guide pillars 9 are fixedly connected to the same positioning plate 10. An observation hood 11 is provided between the bottom of the positioning plate 10 and the top of the operation panel 2. An air extraction connector 12 is provided at the top of the observation hood 11. A vertical pipe 13 is connected to and fixed at the bottom of the operation panel 2. The end of the vertical pipe 13 extends to the top of the operation panel 2 and connects to and is fixed to the observation hood 11. Two T-shaped slide rails 14 are fixedly connected to one side of the fixing plate 3. A slider 15 is slidably connected to the T-shaped slide rails 14. One side of the slider 15 is fixedly connected to one side of the connecting plate 7, allowing external air to pass through. The vacuum fixture is connected to the observation hood 11 via the air extraction connector 12. The product to be tested is manually placed above the sealing layer 8, and the control switch 19 is pressed. The cylinder 5 is activated, moving the connecting plate 7 upwards via the L-shaped block 6. The connecting plate 7 continues to move the product upwards until it contacts and presses against the vertical pipe 13. At this point, a sealed space is formed between the product, the vertical pipe 13, the sealing layer 8, and the vacuum fixture. The vacuum fixture begins to extract air, gradually expelling the gas from the sealed space and creating a negative pressure environment. When the negative pressure reaches a preset value... The vacuum fixture stops pumping air and enters the pressure holding stage for inspection. The pressure change in the sealed space is observed through the observation hood 11. During the pressure holding period, if there is a leak in the product, the pressure in the sealed space will gradually rise. If there is no leak in the product, the pressure remains stable to determine whether the product is qualified. After the pressure holding time is up, the vacuum fixture automatically releases air, so that the pressure in the sealed space returns to normal pressure. The inspected product is then manually removed from above the sealing layer 8 to complete the unloading operation, thereby improving worker efficiency, reducing the probability of false inspection, and increasing the yield rate.

[0027] In some embodiments, sealing plates 16 are fixedly connected to both sides of the housing 1, and four levelers 17 are fixedly connected to the bottom of the housing 1.

[0028] In some embodiments, two hinges 18 are fixedly connected to the rear side of the housing 1, and the same rear door 20 is fixedly connected to the two hinges 18. The rear door 20 facilitates the removal of the tested product.

[0029] In some embodiments, a control switch 19 is provided on the top of the housing 1.

[0030] In some embodiments, the slider 15 has a sliding groove with openings on both sides. The slider 15 is slidably connected to the corresponding T-shaped slide rail 14 through the sliding groove. The slider 15 limits the connection plate 7, so that the connection plate 7 can only move up and down.

[0031] In some embodiments, the observation cover 11 is made of acrylic material. The acrylic sheet has high transparency similar to glass, typically reaching over 93%, which allows the product inside the observation cover 11 to be clearly observed without visual interference.

[0032] Working principle or structural principle: During use, the external vacuum fixture is connected to the observation cover 11 through the air extraction connector 12, ensuring a tight and leak-free connection. The product to be tested is manually placed above the sealing layer 8, ready for airtightness testing. Pressing the control switch 19 activates the cylinder 5. The cylinder 5 moves the connecting plate 7 upward via the L-shaped block 6. The connecting plate 7 moves the slider 15 along the corresponding T-shaped slide rail 14, ensuring smooth and accurate movement. The connecting plate 7 continues to move the product upward until it contacts and presses against the vertical tube 13. At this point, a tight seal is formed between the product, the vertical tube 13, the sealing layer 8, and the vacuum fixture. In a closed space, the vacuum fixture begins to pump air, gradually expelling the gas from the sealed space and creating a negative pressure environment. When the negative pressure reaches a preset value, the vacuum fixture stops pumping air and enters the pressure holding stage for inspection. The pressure change in the sealed space is observed through the observation hood 11. During the pressure holding period, if there is a leak in the product, the pressure in the sealed space will gradually rise. If there is no leak in the product, the pressure remains stable. After the pressure holding time is up, the vacuum fixture automatically releases air, restoring the pressure in the sealed space to normal pressure. The inspected product is then manually removed from above the sealing layer 8 to complete the unloading operation, thereby improving worker efficiency, reducing the probability of false inspections, and increasing the yield rate.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air tightness testing apparatus comprising a housing (1), characterised in that: The top of the shell (1) is provided with an operation panel (2), the inner wall of the top of the shell (1) is fixedly connected with two fixed plates (3), one side of the fixed plate (3) is fixedly connected with two fixed ears (4), the same side of the two fixed ears (4) is fixedly connected with the same air cylinder (5), the output end of the air cylinder (5) is fixedly connected with an L-shaped block (6), the bottom inner wall of the two L-shaped blocks (6) is fixedly connected with the same connecting plate (7), the top of the connecting plate (7) is provided with a sealing layer (8), the top of the shell (1) is fixedly connected with two guide columns (9), the top end of the two guide columns (9) is fixedly connected with the same positioning plate (10), the bottom of the positioning plate (10) and the top of the operation panel (2) are provided with an observation cover (11), the top of the observation cover (11) is provided with an air extraction joint (12), the bottom of the operation panel (2) is communicated and fixedly connected with a vertical pipe (13), the end of the vertical pipe (13) extends to the top of the operation panel (2) and is communicated and fixed with the observation cover (11), one side of the fixed plate (3) is fixedly connected with two T-shaped sliding rails (14), the T-shaped sliding rail (14) is slidably connected with a sliding block (15), one side of the sliding block (15) is fixedly connected with one side of the connecting plate (7).

2. The air tightness testing apparatus of claim 1, wherein: Both sides of the shell (1) are fixedly connected with sealing plates (16), the bottom of the shell (1) is fixedly connected with four levelers (17).

3. The air tightness testing apparatus of claim 2, wherein: The rear side of the shell (1) is fixedly connected with two hinges (18), the two hinges (18) are fixedly connected with the same back door (20).

4. The air tightness testing apparatus of claim 3, wherein: The top of the shell (1) is provided with a control switch (19).

5. The air tightness testing apparatus of claim 4, wherein: The sliding block (15) is provided with a sliding groove with open sides, and the sliding block (15) is slidably connected with the corresponding T-shaped sliding rail (14) through the sliding groove.

6. The air tightness testing apparatus of claim 5, wherein: The observation cover (11) is made of acrylic material.

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