Air tightness detection device for filter

Abstract

The utility model relates to the field of filter processing devices, in particular to a filter air tightness detection device which comprises a detection groove, a rotating shaft is arranged on the detection groove, the rotating shaft is driven by a motor to rotate, a fixing disc is fixed on the rotating shaft, fixing grooves are evenly formed in the fixing disc, and the air tightness of the filter is detected through the fixing grooves. Fixing grooves are formed in the rotating shaft, air pipes communicated with an air pump are fixed in the fixing grooves, a fixing plate is further fixed to the rotating shaft, air cylinders are fixed to the positions, corresponding to the fixing grooves, of the fixing plate, and fixing blocks are fixed to the tail ends of piston rods of the air cylinders. According to the device, the filters are sequentially put into water to be detected, and the detection efficiency of the filters is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of filter processing equipment, and more particularly to a filter airtightness testing device. Background Technology

[0002] A filter is an accessory that uses filter paper to filter impurities or gases. Filters require airtightness testing before leaving the factory to eliminate substandard products. Patent application number CN202121018432.7 discloses an airtightness testing frame for a filter housing, including a base and bearings. A support column is fixedly connected to the top center of the base, and a testing box is fixedly connected to the top of the support column. A testing groove is formed at the top of the testing box, and a movable clamping plate is slidably connected to the right end of the testing groove. A sealing ring is embedded and fixed to the left side of the movable clamping plate. An air pipe passes through the top center of the movable clamping plate, and an embedding slot is provided in the middle of the left side of the movable clamping plate. The bottom end of the air pipe communicates with the embedding slot. A screw is rotatably connected to the right end of the movable clamping plate via a bearing. The screw is threadedly connected to the right side wall of the testing box, and a drive knob is fixedly connected to the right end of the screw. An automatic water injection component is provided at the upper middle position of the left end of the testing box. The filter housing is placed in the testing tank, with the large-hole end pressing against the rubber pad and the small-hole end pressing against the sealing ring, aligning with the embedded slot. Then, turning the drive knob rotates the screw to firmly press the filter housing in place. Water is then injected into the testing tank through the inlet until the float plugs the bottom of the water inlet pipe. Air is then injected into the inner cavity of the filter housing through the air pipe, and the air bubbles on the water surface are observed to determine the filter housing's seal. However, this type of testing device requires removing and repositioning the filter after each test before testing the next, resulting in low testing efficiency.

[0003] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a filter airtightness testing device.

[0005] This invention can be achieved through the following technical solutions:

[0006] This invention discloses a filter airtightness testing device, comprising a testing tank with a rotating shaft driven by a motor. A fixed disk is fixed to the rotating shaft, and the fixed disk has evenly distributed fixing slots. An air pipe connected to an air pump is fixed within each fixing slot. A fixed plate is also fixed to the rotating shaft, and cylinders are fixed at positions corresponding to the fixing slots on the fixed plate. A fixing block is fixed to the end of the piston rod of each cylinder. During filter testing, the open end of the filter is inserted into a fixing slot on the fixed disk, and the air pipe enters the filter. The corresponding cylinder is activated, extending its piston rod. After the fixing block contacts the filter, the filter is fixed between the fixing block and the fixed disk. The motor drives the rotating shaft to rotate a certain angle, fixing another filter to be tested at the uppermost fixing slot on the fixed disk. This process is repeated. After the filter is fixed, it rotates with the rotating shaft and enters the water in the testing tank. Air is then pumped into the corresponding filter position by the air pump. After air enters the filter through the air tube, it is observed whether bubbles are continuously generated at the position of the filter, thereby realizing the airtightness test of the filter. The operation is cyclical. After the tested filter is rotated to the top of the test tank by the rotating shaft, the corresponding cylinder is started, the piston rod on the cylinder is shortened, the tested filter is removed, and the filter to be tested is placed again. This device puts the filters into the water in sequence to test the filters, and there is no need to wait for the filter to be removed and fixed again before the filter can be tested, which greatly improves the testing efficiency of the filter.

[0007] Preferably, a driven gear is fixed on the rotating shaft, and a master gear is fixed at the output end of the motor, with the master gear meshing with the driven gear.

[0008] Preferably, a sealing ring is fixed to the bottom of each of the fixing grooves. The sealing ring prevents air from escaping from the filter opening.

[0009] Preferably, each of the fixing blocks is fixed with a permanent magnet. After the test is completed, the piston rod on the cylinder shortens, the filter housing is made of iron, the filter is attracted to the permanent magnet, and the filter moves with the fixing block, pulling the filter out of the fixing groove.

[0010] Preferably, a water spray pipe connected to a water pump is fixed at the bottom of the testing tank, and a nozzle is fixed on the water spray pipe. After the filter enters the testing tank, water is sprayed out through the nozzle to wash away air bubbles on the surface of the filter, thus preventing air bubbles adhering to the surface of the filter after entering the water from affecting the confirmation of whether there is a leak.

[0011] Compared with existing technologies, the present invention has the following advantages:

[0012] This device sequentially places the filters into the water to test them, without requiring the filters to be removed and re-secured before testing, greatly improving the efficiency of filter testing. Attached Figure Description

[0013] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention from another angle;

[0016] Figure 3 for Figure 2 Sectional view at point AA;

[0017] In the diagram: 1. Detection slot; 2. Rotating shaft; 3. Motor; 4. Main gear; 5. Driven gear; 6. Fixed plate; 7. Fixed slot; 8. Sealing ring; 9. Air pipe; 10. Fixed plate; 11. Cylinder; 12. Fixed block; 13. Permanent magnet; 14. Water spray pipe; 15. Spray head; 16. Filter; Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0019] Example 1:

[0020] like Figures 1 to 3As shown, this embodiment discloses a filter airtightness testing device, including a testing groove 1, a rotating shaft 2 is provided on the testing groove 1, the rotating shaft 2 is driven to rotate by a motor 3, a fixed plate 6 is fixed on the rotating shaft 2, a fixed groove 7 is evenly provided on the fixed plate 6, an air pipe 9 connected to an air pump is fixed in each of the fixed grooves 7, a fixed plate 10 is also fixed on the rotating shaft 2, a cylinder 11 is fixed on the fixed plate 10 at a position corresponding to the fixed groove 7, and a fixed block 12 is fixed to the end of the piston rod of each cylinder 11. During filter 16 testing, the open end of filter 16 is inserted into the fixing groove 7 of fixing plate 6. Air pipe 9 enters the filter 16, and the corresponding cylinder 11 is activated. The piston rod on cylinder 11 extends, and after fixing block 12 contacts filter 16, filter 16 is fixed between fixing block 12 and fixing plate 6. Motor 3 drives rotating shaft 2 to rotate a certain angle, and another filter 16 to be tested is fixed in the fixing groove 7 at the top of fixing plate 6. The operation is repeated. After the filter 16 is fixed, it rotates with rotating shaft 2 and enters the water in testing tank 1. Air pump fills the corresponding filter 16 with water. Air is introduced and enters the filter 16 through the air pipe 9. Observe whether bubbles are continuously generated at the position of the filter 16 to achieve the airtightness test of the filter 16. The operation is repeated. After the tested filter 16 is rotated to the top of the test tank 1 by the rotating shaft 2, the corresponding cylinder 11 is started, the piston rod on the cylinder 11 is shortened, the tested filter 16 is removed, and the filter 16 to be tested is placed again. This device sequentially puts the filter 16 into the water to test the filter 16, and there is no need to wait for the filter 16 to be removed and fixed again before the filter 16 can be tested, which greatly improves the testing efficiency of the filter 16.

[0021] Among them, a driven gear 5 is fixed on the rotating shaft 2, and a main gear 4 is fixed at the output end of the motor 3. The main gear 4 meshes with the driven gear 5.

[0022] Each of the fixing grooves 7 has a sealing ring 8 fixed at its bottom. The sealing ring 8 prevents air from escaping from the opening of the filter 16.

[0023] In this process, a permanent magnet 13 is fixed on each of the fixed blocks 12. After the test is completed, the piston rod on the cylinder 11 is shortened, the filter 16 housing is made of iron, the filter 16 is attracted to the permanent magnet 13, the filter 16 moves with the fixed block 12, and the filter 16 is pulled out from the fixed groove 7.

[0024] Example 2:

[0025] This embodiment discloses a filter airtightness testing device. Based on the structure and principle of Embodiment 1, the bottom of the testing tank 1 in this embodiment is fixed with a water spray pipe 14 connected to a water pump, and a nozzle 15 is fixed on the water spray pipe 14. After the filter 16 enters the testing tank 1, water is sprayed out through the nozzle 15 to wash away the air bubbles on the surface of the filter 16, thus avoiding the influence of air bubbles adhering to the surface of the filter 16 after entering the water surface on the confirmation of whether there is a leak.

[0026] The above are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be considered within the scope of protection of the present invention.

Claims

1. A filter airtightness testing device, characterized in that, The device includes a detection slot, on which a rotating shaft is provided. The rotating shaft is driven to rotate by a motor. A fixed plate is fixed on the rotating shaft. Fixed slots are evenly arranged on the fixed plate. An air pipe connected to an air pump is fixed in each of the fixed slots. A fixed plate is also fixed on the rotating shaft. A cylinder is fixed on the fixed plate at a position corresponding to the fixed slot. A fixed block is fixed to the end of the piston rod of each cylinder.

2. The filter airtightness testing device according to claim 1, characterized in that: A driven gear is fixed on the rotating shaft, and a master gear is fixed at the output end of the motor. The master gear meshes with the driven gear.

3. The filter airtightness testing device according to claim 1, characterized in that: Each of the fixing grooves has a sealing ring fixed to its bottom.

4. The filter airtightness testing device according to claim 1, characterized in that: Each of the fixing blocks is fixed with a permanent magnet.

5. The filter airtightness testing device according to claim 1, characterized in that: A water spray pipe connected to a water pump is fixed at the bottom of the detection tank, and a nozzle is fixed on the water spray pipe.

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