Negative pressure air bin type fine filter air tightness detection machine

Abstract

The utility model discloses a negative pressure air cabin type fine filter air tightness detection machine, which relates to the technical field of air tightness detection equipment, and comprises a rack, an air cabin lower die is a rectangular cavity with an upper opening at the upper part, a detection assembly is arranged in the cavity, the detection assembly comprises a placing plate for placing a fine filter shell, and the left side and the right side of the placing plate are respectively provided with an air cabin lower die. An air inlet joint and an air outlet joint are respectively arranged on the left side wall and the right side wall of the air bin lower die, and an air inlet pipe and an air outlet pipe are respectively arranged in the air inlet joint and the air outlet joint; the air bin lower die is connected to the sliding rail in a sliding mode and moves front and back along the sliding rail under pushing of the air cylinder. The air bin upper die is buckled above the upper opening of the air bin lower die, the air bin upper die and the air bin lower die jointly form a closed negative pressure air bin, and the negative pressure air bin is connected with a negative pressure machine; the air bin upper die is slidably connected to the supporting column through a connecting plate. The branch air bin upper die is pushed by the air cylinder to move up and down along the supporting column. The air tightness of the fine filter can be automatically detected, and errors caused by human factors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection equipment, in particular to an air tightness detection machine for a negative pressure air chamber type fine filter. Background Art

[0002] The fine filter assembly is mainly composed of a filter element, a shell and other connecting parts, among which the filter element is the main filtering part, which is responsible for filtering the gas, and the shell is an external structure that provides necessary support for the filter element; when the fine filter assembly is manufactured, it needs to be tested for air tightness, and the existing air tightness testing method generally adopts manual testing, which manually places the product completely in water, and relies on the "immersion bubble method" to observe whether the product has bubbles, and then judge whether there is a leak; however, this manual testing method requires workers to observe with their eyes for a long time, and it is inevitable that they will be distracted, making it difficult to monitor tiny leaks of the product, and it is easy to omissions. The test results are greatly affected by subjective factors and have high requirements on workers; and this method cannot accurately determine the actual leakage value of the product, which is not conducive to the quantification of leakage data; at the same time, after the test is completed, there is a large amount of water on the surface and inner hole of the product, which needs to be dried, adding additional processes. Utility Model Content

[0003] The purpose of the utility model is to provide a negative pressure air chamber type fine filter air tightness detection machine, which can realize automatic detection of the air tightness of the fine filter, reduce the error of human factors, do not need to be immersed in water, and save the process of drying the product after immersion in water. At the same time, it has a simple structure, intuitive results, high test efficiency, and low requirements for workers.

[0004] The utility model comprises a frame, wherein a detection device for detecting the air tightness of a fine filter is arranged in the frame, wherein the detection device comprises an air chamber upper mold and an air chamber lower mold which are buckled together; the air chamber lower mold is a rectangular cavity with an upper opening at the upper part, wherein a detection component is arranged in the cavity, wherein the detection component comprises a placement plate for placing a fine filter housing, wherein the left and right sides of the placement plate are located on the left and right side walls of the air chamber lower mold, and an air inlet joint and an air outlet joint are respectively arranged, wherein an air inlet pipe and an air outlet pipe are respectively arranged in the air inlet joint and the air outlet joint The air chamber lower mold is connected to the slide rail, which is fixed in the frame, and the air chamber lower mold moves forward and backward along the slide rail under the push of the cylinder; the air chamber upper mold is buckled on the upper opening of the air chamber lower mold, and together with the air chamber lower mold, a closed negative pressure air chamber is formed, and the negative pressure air chamber is connected to the negative pressure machine; the air chamber upper mold is connected to the pillar through a connecting plate, which is fixed in the frame, and the air chamber upper mold moves up and down along the pillar under the push of the cylinder.

[0005] Preferably, two arc-shaped cavities are provided on the plate body of the placing plate, the cavities pass through the front and rear sides of the placing plate, the radius of the cavities is not less than the radius of the shell of the fine filter to be tested, and the spacing between the two cavities is adapted to the distance between the two shells of the fine filter to be tested.

[0006] Preferably, a sealing ring is provided at the upper opening of the lower mold of the air chamber, and the sealing ring is arranged around the edge of the upper opening.

[0007] Preferably, a fixing groove for fixing the fine filter assembly is provided on the rear side wall of the lower mold of the air bin.

[0008] Preferably, a limiting rod for limiting the position of the fine filter assembly is provided on the rear side of the air bin lower mold, located on the bottom wall of the air bin lower mold.

[0009] Preferably, two groups of detection components are provided in the cavity of the lower mold of the air bin, and the two groups of detection components are symmetrically arranged on the front and rear sides of the cavity of the lower mold of the air bin, and the two groups of detection components are respectively connected to independent air inlet pipes and air outlet pipes.

[0010] In summary, the utility model has the following beneficial effects:

[0011] 1. It can automatically detect the air tightness of the fine filter, without workers having to stare at the bubbles in the water for a long time, saving labor, reducing workers' fatigue, improving production efficiency, and reducing omissions caused by human factors, thereby improving the qualified rate of products. At the same time, it has a simple structure, intuitive results, high test efficiency, and low requirements for workers;

[0012] 2. The product does not need to be immersed in water when testing in a negative pressure chamber, which saves the process of drying the product after immersion in water and avoids the risk of rust caused by immersion in water;

[0013] 3. Two groups of detection components can be arranged in the cavity, and the air tightness of two groups of fine filter components can be detected at the same time, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a negative pressure air chamber type fine filter air tightness tester of the utility model;

[0015] Figure 2 for Figure 1 A cross-sectional view of

[0016] Figure 3 It is a structural schematic diagram of the lower mold of the gas chamber;

[0017] Figure 4 A schematic diagram of the structure after the fine filter assembly is installed on the lower mold of the gas chamber;

[0018] Figure 5 It is a structural schematic diagram of a fine filter assembly;

[0019] Figure 6 This is a schematic diagram of the structure in which two sets of detection components are provided in the lower mold of the gas chamber;

[0020] Figure 7 for Figure 6 Schematic diagram of the structure after the fine filter assembly is installed.

[0021] In the figure: 1. frame; 2. air bin upper mold; 3. air bin lower mold; 4. cavity; 5. placement plate; 6. air inlet connector; 7. air outlet connector; 8. slide rail; 9. support; 10. concave cavity; 11. sealing ring; 12. fixing groove; 13. limiting rod; 14. fine filter housing; 15. fine filter assembly; 16. touch screen. DETAILED DESCRIPTION

[0022] The utility model will be further described below in conjunction with the accompanying drawings.

[0023] The positions mentioned in this specification are based on the positions of the negative pressure air chamber type fine filter air tightness tester of the utility model during normal operation, and do not limit the positions during storage and transportation. They only represent relative position relationships, not absolute position relationships.

[0024] like Figures 1 to 5 As shown together, a negative pressure air bin type fine filter air tightness detection machine comprises a frame 1, in which a detection device for detecting the air tightness of the fine filter is arranged, and the detection device comprises an air bin upper mold 2 and an air bin lower mold 3 which are buckled together; the air bin lower mold 3 is a rectangular cavity 4 with an upper opening at the upper part, and a detection component is arranged in the cavity 4, and the detection component comprises a placement plate 5 for placing a fine filter housing 14, and the left and right sides of the placement plate 5 are located on the left and right side walls of the air bin lower mold 3, and are respectively provided with an air inlet joint 6 and an air outlet joint 7, and the air inlet joint 6 and the air outlet joint 7 are respectively provided with an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe move left and right under the push of the cylinder; the air bin lower mold 3 is slidably connected to a slide rail 8, and the slide rail 8 is fixedly arranged on the frame 1 Inside, the lower mold 3 of the air bin moves forward and backward along the slide rail 8 under the push of the cylinder; the upper mold 2 of the air bin is buckled above the opening of the lower mold 3 of the air bin, and together with the upper mold 2 of the air bin, a closed negative pressure air bin is formed, and the negative pressure air bin is connected to a negative pressure machine. When working, the negative pressure machine draws air out of the negative pressure air bin to form a negative pressure of a characteristic value in the negative pressure air bin, which is convenient for observing the air tightness of the fine filter; the upper mold 2 of the air bin is slidably connected to the pillar 9 through a connecting plate, and the pillar 9 is fixed in the frame 1. The upper mold 2 of the air bin moves up and down along the pillar 9 under the push of the cylinder; a touch screen 16 is provided on the front side panel of the frame 1, and the touch screen 16 is connected to the control module. Through the touch button operation of the touch screen 16, corresponding instructions are issued to the detection machine, so that the corresponding components make corresponding actions.

[0025] Furthermore, two arc-shaped cavities 10 are provided on the plate body of the placement plate 5, and the cavities 10 pass through the front and rear sides of the placement plate 5. The radius of the cavity 10 is not less than the radius of the fine filter housing 14 to be tested, and the spacing between the two cavities 10 is adapted to the distance between the two housings of the fine filter to be tested. The housing of the fine filter is placed in the cavity 10 to be fixed, and the arc-shaped cavity 10 makes the contact area between the fine filter housing 14 and the placement plate 5 wider and the contact more stable.

[0026] Furthermore, a sealing ring 11 is provided at the upper opening of the air storage lower mold 3. The sealing ring 11 is arranged around the edge of the upper opening and distributed on the four sides of the upper opening. When the air storage upper mold 2 and the air storage lower mold 3 are buckled together, the sealing ring 11 plays a sealing role to prevent the negative pressure air storage from leaking.

[0027] Furthermore, a fixing groove 12 for fixing the fine filter assembly 15 is provided on the rear side wall of the gas bin lower mold 3 , and the fixing groove 12 is used to fix the corresponding part of the fine filter assembly 15 .

[0028] Furthermore, on the rear side of the gas bin lower mold 3, located on the bottom wall of the gas bin lower mold 3, there is a limiting rod 13 for limiting the fine filter assembly 15. Two limiting rods 13 are provided, which are used in conjunction with the positioning holes on the fine filter to achieve the limitation of the fine filter.

[0029] Furthermore, if Figure 6 and Figure 7 As shown, two groups of detection components are provided in the cavity 4 of the air bin lower mold 3. The two groups of detection components are symmetrically arranged on the front and rear sides of the cavity 4 of the air bin lower mold 3. The two groups of detection components are respectively connected to independent air inlet pipes and air outlet pipes. The two groups of detection components can detect two fine filters at the same time, thereby improving work efficiency.

[0030] When in use, first click the corresponding button on the touch screen 16, the cylinder drives the gas bin lower mold 3 to move on the slide rail 8, and pushes the gas bin lower mold 3 to the front side of the detection machine. The operator places the fine filter assembly 15 on the placement plate 5, and makes the corresponding position of the fine filter assembly 15 engage with the fixing groove 12 and the limit rod 13 respectively, so as to fix the fine filter assembly 15; then the cylinder pushes the gas bin lower mold 3 to move backward to the set position and stop, and the gas bin lower mold 3 is pushed by another group of cylinders to move downward until it is completely buckled with the upper opening of the gas bin lower mold 3; finally, the third group of cylinders pushes the air inlet pipe and the air outlet pipe to the gas bin lower mold 3 , so that it is tightly connected with the air inlet and outlet of the fine filter assembly 15, and the installation of the fine filter assembly 15 is completed; the negative compressor draws air out of the negative pressure air chamber to form a negative pressure of a specific value in the negative pressure air chamber, and maintain this negative pressure value; at this time, use an air pump to inject air of a certain pressure into the air inlet pipe, and the air enters from the air inlet of the fine filter assembly 15 and is discharged from the air outlet, and is maintained for a certain period of time, and the negative pressure value in the negative pressure chamber displayed on the touch screen 16 is observed. If the negative pressure value remains unchanged, it means that the fine filter assembly 15 is not leaking. If the value increases, it means that the fine filter assembly 15 is leaking.

[0031] In order to improve work efficiency, two groups of fine filter assemblies 15 to be tested can be placed in the cavity 4 at the same time, and the two groups of fine filter assemblies 15 can be tested for air tightness at the same time. If no leakage is found, it means that the air tightness tests of the two groups of fine filter assemblies 15 have passed. If leakage occurs, the two groups of fine filter assemblies 15 need to be tested separately to check the air tightness of each fine filter assembly 15.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A negative pressure air chamber type fine filter air tightness tester, characterized in that: The invention comprises a frame (1), wherein a detection device for detecting the air tightness of a fine filter is arranged in the frame (1), wherein the detection device comprises an air chamber upper mold (2) and an air chamber lower mold (3) which are buckled together; the air chamber lower mold (3) is a rectangular cavity (4) with an upper opening at the top, wherein a detection component is arranged in the cavity (4), wherein the detection component comprises a placement plate (5) for placing a fine filter housing (14), wherein the left and right sides of the placement plate (5) are located on the left and right side walls of the air chamber lower mold (3), and are respectively provided with an air inlet joint (6) and an air outlet joint (7), wherein the air inlet joint (6) and the air outlet joint (7) are respectively provided with an air inlet pipe and an air outlet pipe, wherein the air inlet joint (6) and the air outlet joint (7) are respectively provided with an air inlet pipe and an air outlet pipe, wherein the air inlet pipe is provided with a plurality of air outlet pipes, wherein the air inlet pipe is provided with a plurality of air outlet pipes, wherein the air outlet ... The air chamber lower mold (3) is connected to the air chamber lower mold (3) by sliding on the slide rail (8), the slide rail (8) is fixed in the frame (1), and the air chamber lower mold (3) moves forward and backward along the slide rail (8) under the push of the air cylinder; the air chamber upper mold (2) is buckled on the upper opening of the air chamber lower mold (3), and together with the air chamber lower mold (3) forms a closed negative pressure air chamber, and the negative pressure air chamber is connected to the negative pressure machine; the air chamber upper mold (2) is connected to the support (9) by sliding on the connecting plate, the support (9) is fixed in the frame (1), and the air chamber upper mold (2) moves up and down along the support (9) under the push of the air cylinder.

2. A negative pressure air chamber type fine filter air tightness testing machine as claimed in claim 1, characterized in that: The plate body of the placement plate (5) is provided with two arc-shaped concave cavities (10), the concave cavities (10) passing through the front and rear sides of the placement plate (5), the radius of the concave cavities (10) is not less than the radius of the housing (14) of the fine filter to be tested, and the spacing between the two concave cavities (10) is adapted to the distance between the two housings of the fine filter to be tested.

3. The negative pressure air chamber type fine filter air tightness testing machine according to claim 1, characterized in that: A sealing ring (11) is provided at the upper opening of the gas chamber lower mold (3), and the sealing ring (11) is arranged around the edge of the upper opening.

4. The negative pressure air chamber type fine filter air tightness tester according to claim 1, characterized in that: A fixing groove (12) for fixing a fine filter assembly (15) is provided on the rear side wall of the gas chamber lower mold (3).

5. The negative pressure air chamber type fine filter air tightness testing machine according to claim 1, characterized in that: A limiting rod (13) for limiting the position of the fine filter assembly (15) is provided on the rear side of the gas bin lower mold (3) and located on the bottom wall of the gas bin lower mold (3).

6. A negative pressure air chamber type fine filter air tightness tester according to any one of claims 1 to 5, characterized in that: Two groups of detection components are arranged in the cavity (4) of the gas bin lower mold (3). The two groups of detection components are symmetrically arranged on the front and rear sides of the cavity (4) of the gas bin lower mold (3). The two groups of detection components are respectively connected to independent air inlet pipes and air outlet pipes.

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