Filtering tank airtightness detection device

Abstract

The utility model discloses a filter tank airtightness detection device, which comprises a rack, a sealing mechanism and a detection mechanism, the sealing mechanism comprises a first sealing plate, a second sealing plate and a first cylinder, and the first sealing plate and the second sealing plate are vertically arranged. The first air cylinder is used for driving one of the first sealing plate and the second sealing plate to be close to or away from the other one of the first sealing plate and the second sealing plate. The detection mechanism comprises a high-pressure air storage cylinder, an air inlet pipe, an air blocking pipe and a barometer, one end of the air inlet pipe is connected with the high-pressure air storage cylinder, the other end of the air inlet pipe penetrates through the first sealing plate to be communicated with a tank opening in one end of the filtering tank, the air blocking pipe is arranged on the second sealing plate and communicated with a tank opening in the other end of the filtering tank, and the barometer is arranged on the air blocking pipe. The barometer is used for detecting air pressure of the filtering tank. The air tightness detection device for the filtering tank can reduce the detection operation difficulty and improve the efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of airtight detection equipment, in particular to an airtight detection device for a filter tank. Background Art

[0002] In civil defense projects, air defense buildings are buildings that are built to defend against air raids, such as air-raid shelters.

[0003] When the air-raid building is in use, the protective door needs to be closed tightly. In order to take into account the air circulation in the air-raid building and prevent toxic substances from entering, it is usually necessary to install a filter tank in the air-raid building. Structurally, the filter tank includes a first tank body and a second tank body that are interconnected, and a filter screen arranged between the first tank body and the second tank body. The air enters the filter tank from the tank port at one end of the first tank body away from the filter screen, and then passes through the filter screen and is transported to the air-raid building from the tank port at one end of the second tank body away from the filter screen.

[0004] In the related art, in order to avoid leakage of the filter tank, it is often necessary to detect the air tightness of the filter tank.

[0005] Currently, the air tightness detection method of the filter tank requires manually sealing the tank openings of the first tank body and the second tank body and then injecting gas into the filter tank for detection.

[0006] However, the existing air tightness detection of the filter tank is difficult to operate and has low efficiency. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a filter tank air tightness detection device, which can reduce the difficulty of detection operation and improve efficiency.

[0008] According to the first aspect of the utility model, an air tightness detection device for a filter tank comprises: a frame; a sealing mechanism, which is arranged on the frame, comprising a first sealing plate, a second sealing plate and a first cylinder, the first sealing plate and the second sealing plate are arranged upright, the first cylinder is used to drive one of the first sealing plate and the second sealing plate to approach and move away from the other of the first sealing plate and the second sealing plate, the first sealing plate and the second sealing plate clamp the two ends of the filter tank to seal the tank openings at both ends of the filter tank; a detection mechanism comprises a high-pressure air storage cylinder, an air intake pipe, an air blocking pipe and a pressure gauge, one end of the air intake pipe is connected to the high-pressure air storage cylinder, the other end of the air intake pipe passes through the first sealing plate to connect to the tank opening at one end of the filter tank, the air blocking pipe is arranged on the second sealing plate, the air blocking pipe is connected to the tank opening at the other end of the filter tank, the pressure gauge is arranged on the air blocking pipe, and the pressure gauge is used to detect the air pressure of the filter tank.

[0009] A filter tank air tightness detection device according to an embodiment of the utility model has at least the following beneficial effects:

[0010] 1. The utility model provides a sealing mechanism on a frame, wherein the sealing mechanism includes a first sealing plate, a second sealing plate and a first cylinder. The first sealing plate and the second sealing plate are arranged vertically. The first cylinder is used to drive one of the first sealing plate and the second sealing plate to approach and move away from the other of the first sealing plate and the second sealing plate. The first sealing plate and the second sealing plate clamp the two ends of the filter tank to seal the tank openings at the two ends of the filter tank. It can be understood that the first sealing plate and the second sealing plate are arranged vertically so that the first sealing plate and the second sealing plate can seal the filter tank placed horizontally, and the filter tank placed horizontally is easier to carry, thereby facilitating the carrying and loading of materials. In addition, the first cylinder drives one of the first sealing plate and the second sealing plate to approach and move away from the other of the first sealing plate and the second sealing plate. and away from the other of the first sealing plate and the second sealing plate. On the one hand, it can increase the pressure of the first sealing plate and the second sealing plate on the filter tank, thereby making the sealing effect of the first sealing plate and the second sealing plate on the filter tank better and improving the accuracy of detection. On the other hand, the first sealing plate and the second sealing plate clamp the filter tank, so that the sealing mechanism clamps and fixes the filter tank while sealing the filter tank, eliminating the need to set up a clamping mechanism to fix the filter tank, thereby making the structure of the filter tank airtightness detection device simpler and the manufacturing cost lower. At the same time, through the cooperation of the first cylinder, the first sealing plate and the second sealing plate, the effect of automatically sealing the tank mouth of the filter tank is achieved, reducing the difficulty of detection operation and improving efficiency.

[0011] 2. The utility model is provided with a detection mechanism, which includes a high-pressure gas storage cylinder, an air intake pipe, an air blocking pipe and a barometer. One end of the air intake pipe is connected to the high-pressure gas storage cylinder, and the other end of the air intake pipe passes through a first sealing plate to be connected to a tank opening at one end of the filter tank. The air blocking pipe is arranged on a second sealing plate, and the air blocking pipe is connected to the tank opening at the other end of the filter tank. The barometer is arranged on the air blocking pipe, and the barometer is used to detect the air pressure of the filter tank. It can be understood that the gas pressurized by the high-pressure gas storage cylinder enters the filter tank through the air intake pipe, and the gas after entering the filter tank enters the air blocking pipe and is blocked by the air blocking pipe, so that the air pressure in the filter tank remains constant. At this time, the barometer can detect the air pressure of the filter tank in real time. If the air pressure displayed on the barometer remains constant for a long time without decreasing, the air tightness of the filter tank is good. If the air pressure displayed on the barometer decreases over time, the air tightness of the filter tank is poor.

[0012] According to some embodiments of the utility model, the first cylinder is fixed on the frame, and the first cylinder drives the first sealing plate to approach and move away from the second sealing plate. A first guide rod is provided on the side of the first sealing plate facing away from the second sealing plate, and the first guide rod is horizontally slidably connected to the frame.

[0013] According to some embodiments of the utility model, the first cylinder is fixed on the frame, and the first cylinder drives the first sealing plate to approach and move away from the second sealing plate. The sealing mechanism also includes a second cylinder, and the second cylinder is fixed on the frame, and the second cylinder is used to drive the second sealing plate to approach and move away from the first sealing plate.

[0014] According to some embodiments of the present invention, a second guide rod is provided on a side of the second sealing plate facing away from the first sealing plate, and the second guide rod is horizontally slidably connected to the frame.

[0015] According to some embodiments of the utility model, a first rubber pad is provided on the side of the first sealing plate close to the second sealing plate, and the first rubber pad is abutted and sealed against the tank opening at one end of the filter tank, and a second rubber pad is provided on the side of the second sealing plate close to the first sealing plate, and the second rubber pad is abutted and sealed against the tank opening at the other end of the filter tank.

[0016] According to some embodiments of the present invention, the first rubber pad has a first through hole for accommodating the air intake pipe to pass through, and the second rubber pad has a second through hole for accommodating the air blocking pipe to pass through.

[0017] According to some embodiments of the utility model, the air blocking pipe includes a main pipe part, a first branch pipe part and a second branch pipe part connected to the main pipe part, the main pipe part is connected to the tank mouth of the filter tank, the pressure gauge is arranged in the first branch pipe part, and the second branch pipe part is provided with a switch valve, and the switch valve is used to open and close the second branch pipe part.

[0018] According to some embodiments of the utility model, the frame includes a frame body, a lifting frame connected to the frame body for sliding up and down, and a first screw that drives the lifting frame to rise and fall, the first screw is rotatably connected to the frame body, the first screw is threadedly connected to the lifting frame, and the sealing mechanism is arranged on the lifting frame.

[0019] According to some embodiments of the utility model, the lifting frame includes two support seats arranged in parallel and a crossbeam connecting the two support seats, the two support seats respectively support the first sealing plate and the second sealing plate, the frame body is provided with a first groove extending up and down, the first groove is provided with a first bolt, and the first bolt is threadedly connected to the support seat to fix the support seat.

[0020] According to some embodiments of the present invention, the top end of the first screw rod extends outside the frame body, and a hand wheel is provided at the top end of the first screw rod.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic structural diagram of a filter tank air tightness detection device according to an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A top view is shown;

[0025] Figure 3 for Figure 1 Side view shown.

[0026] Figure numerals: 100-frame, 110-first sealing plate, 120-second sealing plate, 130-first cylinder, 140-high-pressure gas storage cylinder, 150-intake pipe, 160-air blocking pipe, 170-pressure gauge, 180-first guide rod, 190-second cylinder, 200-second guide rod, 210-first rubber pad, 220-second rubber pad, 230-main part, 240-first branch part, 250-second branch part, 260-switch valve, 270-frame, 280-lifting frame, 290-first screw, 300-support seat, 310-crossbeam, 320-first groove, 330-first bolt, 340-handwheel. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] A filter tank air tightness detection device according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0032] Reference Figure 1 , Figure 2 and Figure 3 A filter tank air tightness detection device according to an embodiment of the utility model includes a frame 100, a sealing mechanism and a detection mechanism.

[0033] For the rack 100, the rack 100 includes a frame body 270, a lifting frame 280 connected to the frame body 270 for sliding up and down, and a first screw 290 that drives the lifting frame 280 to move up and down. The first screw 290 is rotatably connected to the frame body 270, and the first screw 290 is threadedly connected to the lifting frame 280. A sealing mechanism is set on the lifting frame 280.

[0034] It can be understood that by rotating the first screw 290, the first screw 290 drives the lifting frame 280 to rise and fall, and the lifting frame 280 drives the sealing mechanism to rise and fall. When the inspector uses a cart or other transport tool to transport the filter tank to the sealing mechanism, the first screw 290 drives the lifting frame 280 to descend, so that the lifting frame 280 drives the sealing mechanism to descend to a height that can clamp the filter tank on the transport tool, and then the sealing mechanism clamps and fixes the filter tank. Then the first screw 290 drives the lifting frame 280 to rise, so that the lifting frame 280 drives the sealing mechanism to rise, thereby allowing the filter tank to be separated from the transport tool up and down, and further, making the loading, clamping and fixing operation of the filter tank airtight detection device easier.

[0035] In some specific embodiments, the lifting frame 280 includes two parallel support seats 300 and a crossbeam 310 connecting the two support seats 300. The two support seats 300 respectively support the first sealing plate 110 and the second sealing plate 120. The frame body 270 is provided with a first groove 320 extending up and down. The first groove 320 is provided with a first bolt 330. The first bolt 330 is threadedly connected to the support seat 300 to fix the support seat 300.

[0036] It is understandable that when the height of the lifting frame 280 needs to be adjusted, the first bolt 330 can be loosened so that the support base 300 can be raised and lowered on the rack 100. After the height of the lifting frame 280 is adjusted, the first bolt 330 can be tightened so that the first bolt 330 locks and fixes the support base 300 on the rack 100, thereby making the support base 300 more secure.

[0037] In some specific embodiments, the top end of the first screw 290 extends outside the frame 270, and a hand wheel 340 is provided at the top end of the first screw 290, so that the inspector can rotate the first screw 290 by rotating the hand wheel 340, thereby making the rotation operation of the first screw 290 easier.

[0038] In some specific embodiments, universal wheels are provided at the bottom of the frame 100 to facilitate the movement of the airtightness detection device.

[0039] As for the sealing mechanism, the sealing mechanism is arranged on the frame 100, and the sealing mechanism includes a first sealing plate 110, a second sealing plate 120 and a first cylinder 130. The first sealing plate 110 and the second sealing plate 120 are arranged vertically, and the first cylinder 130 is used to drive one of the first sealing plate 110 and the second sealing plate 120 to approach and move away from the other of the first sealing plate 110 and the second sealing plate 120. The first sealing plate 110 and the second sealing plate 120 clamp the two ends of the filter tank to seal the tank openings at both ends of the filter tank.

[0040] It can be understood that the first sealing plate 110 and the second sealing plate 120 are arranged vertically, so that the first sealing plate 110 and the second sealing plate 120 can seal the horizontally placed filter tank, and the horizontally placed filter tank is easier to carry, thereby facilitating the handling and loading of materials. In addition, the first cylinder 130 drives one of the first sealing plate 110 and the second sealing plate 120 to approach and move away from the other of the first sealing plate 110 and the second sealing plate 120. On the one hand, it can increase the pressure of the first sealing plate 110 and the second sealing plate 120 on the filter tank, thereby making the first sealing plate 110 and The second sealing plate 120 has a better sealing effect on the filter tank, which improves the accuracy of detection. On the other hand, the first sealing plate 110 and the second sealing plate 120 clamp the filter tank, so that the sealing mechanism clamps and fixes the filter tank while sealing the filter tank, eliminating the need to set up an additional clamping mechanism to fix the filter tank. Therefore, the structure of the filter tank airtightness detection device is simpler and the manufacturing cost is lower. At the same time, through the cooperation of the first cylinder 130, the first sealing plate 110 and the second sealing plate 120, the effect of automatically sealing the tank mouth of the filter tank is achieved, reducing the difficulty of detection operation and improving efficiency.

[0041] In some specific embodiments, the first cylinder 130 is fixed on the frame 100, and the first cylinder 130 drives the first sealing plate 110 to approach and move away from the second sealing plate 120. A first guide rod 180 is provided on the side of the first sealing plate 110 facing away from the second sealing plate 120. The first guide rod 180 is horizontally slidably connected to the frame 100, so that the first guide rod 180 can cooperate with the frame 100 to limit the position, thereby making the movement of the first sealing plate 110 smoother.

[0042] In some specific embodiments, the first cylinder 130 is fixed on the frame 100, and the first cylinder 130 drives the first sealing plate 110 to approach and move away from the second sealing plate 120. The sealing mechanism also includes a second cylinder 190, and the second cylinder 190 is fixed on the frame 100. The second cylinder 190 is used to drive the second sealing plate 120 to approach and move away from the first sealing plate 110, so that the first sealing plate 110 and the second sealing plate 120 can move simultaneously to approach and move away from each other. At the same time, the first cylinder 130 and the second cylinder 190 can squeeze the first sealing plate 110 and the second sealing plate 120 at the same time, so that the sealing mechanism exerts greater pressure on the filter tank and the sealing effect is better.

[0043] Furthermore, a second guide rod 200 is provided on the side of the second sealing plate 120 facing away from the first sealing plate 110, and the second guide rod 200 is horizontally slidably connected to the frame 100 so that the second guide rod 200 can cooperate with the frame 100 to limit the position, thereby making the movement of the second sealing plate 120 more stable.

[0044] As for the detection mechanism, the detection mechanism includes a high-pressure air storage cylinder 140, an air intake pipe 150, an air blocking pipe 160 and a barometer 170. One end of the air intake pipe 150 is connected to the high-pressure air storage cylinder 140, and the other end of the air intake pipe 150 passes through the first sealing plate 110 to connect to the tank port at one end of the filter tank. The air blocking pipe 160 is arranged on the second sealing plate 120. The air blocking pipe 160 is connected to the tank port at the other end of the filter tank. The pressure gauge 170 is arranged on the air blocking pipe 160. The pressure gauge 170 is used to detect the air pressure of the filter tank.

[0045] It can be understood that the pressurized gas in the high-pressure gas storage cylinder 140 enters the filter tank through the air inlet pipe 150. The gas after entering the filter tank enters the air blocking pipe 160 and is blocked by the air blocking pipe 160, so that the air pressure in the filter tank remains constant. At this time, the barometer 170 can detect the air pressure of the filter tank in real time. If the air pressure displayed by the barometer 170 remains constant for a long time without decreasing, the air tightness of the filter tank is good. If the air pressure displayed by the barometer 170 decreases over time, the air tightness of the filter tank is not good.

[0046] In some specific embodiments, a first rubber pad 210 is provided on one side of the first sealing plate 110 close to the second sealing plate 120, and the first rubber pad 210 is abutted and sealed against the tank opening at one end of the filter tank. A second rubber pad 220 is provided on one side of the second sealing plate 120 close to the first sealing plate 110, and the second rubber pad 220 is abutted and sealed against the tank opening at the other end of the filter tank, thereby making the first rubber pad 210 and the second rubber pad 220 better fit and seal with the tank openings at both ends of the filter tank, thereby improving the sealing effect of the sealing mechanism on the filter tank.

[0047] In some specific embodiments, the first rubber pad 210 has a first through hole for accommodating the passage of the air intake pipe 150, and the second rubber pad 220 has a second through hole for accommodating the passage of the air blocking pipe 160, thereby preventing the first rubber pad 210 from obstructing the air intake pipe 150 from connecting to the filter tank and preventing the second rubber pad 220 from obstructing the air blocking pipe 160 from connecting to the filter tank.

[0048] In some specific embodiments, the air blocking pipe 160 includes a main pipe part 230, a first branch pipe part 240 connected to the main pipe part 230, and a second branch pipe part 250, the main pipe part 230 is connected to the tank port of the filter tank, the pressure gauge 170 is arranged in the first branch pipe part 240, and the second branch pipe part 250 is provided with a switch valve 260, which is used to open and close the second branch pipe part 250.

[0049] It is understandable that when the detection mechanism performs a sealing test on the filter tank, the switch valve 260 closes the second branch pipe part 250 to prevent air leakage in the air blocking pipe 160. When the detection mechanism completes the sealing test on the filter tank, the switch valve 260 opens the second branch pipe part 250, so that the second branch pipe part 250 can quickly depressurize the filter tank.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A filter tank air tightness detection device, characterized in that: include: Rack(100); A sealing mechanism is arranged on the frame (100), comprising a first sealing plate (110), a second sealing plate (120) and a first cylinder (130), wherein the first sealing plate (110) and the second sealing plate (120) are arranged vertically, and the first cylinder (130) is used to drive one of the first sealing plate (110) and the second sealing plate (120) to approach and move away from the other of the first sealing plate (110) and the second sealing plate (120), and the first sealing plate (110) and the second sealing plate (120) clamp two ends of the filter tank to seal the tank openings at both ends of the filter tank; The detection mechanism comprises a high-pressure gas storage cylinder (140), an air intake pipe (150), an air blocking pipe (160) and a pressure gauge (170), wherein one end of the air intake pipe (150) is connected to the high-pressure gas storage cylinder (140), and the other end of the air intake pipe (150) passes through the first sealing plate (110) to connect to the tank opening at one end of the filter tank, and the air blocking pipe (160) is arranged on the second sealing plate (120), and the air blocking pipe (160) is connected to the tank opening at the other end of the filter tank, and the pressure gauge (170) is arranged on the air blocking pipe (160), and the pressure gauge (170) is used to detect the air pressure of the filter tank.

2. A filter tank air tightness detection device according to claim 1, characterized in that: The first cylinder (130) is fixed on the frame (100), and the first cylinder (130) drives the first sealing plate (110) to approach and move away from the second sealing plate (120). A first guide rod (180) is provided on a side of the first sealing plate (110) facing away from the second sealing plate (120), and the first guide rod (180) is horizontally slidably connected to the frame (100).

3. The air tightness detection device for a filter tank according to claim 1, characterized in that: The first cylinder (130) is fixed on the frame (100), and the first cylinder (130) drives the first sealing plate (110) to approach and move away from the second sealing plate (120). The sealing mechanism also includes a second cylinder (190), and the second cylinder (190) is fixed on the frame (100), and the second cylinder (190) is used to drive the second sealing plate (120) to approach and move away from the first sealing plate (110).

4. A filter tank air tightness detection device according to claim 3, characterized in that: A second guide rod (200) is provided on a side of the second sealing plate (120) facing away from the first sealing plate (110), and the second guide rod (200) is horizontally slidably connected to the frame (100).

5. The air tightness detection device for a filter tank according to claim 1, characterized in that: A first rubber pad (210) is provided on one side of the first sealing plate (110) close to the second sealing plate (120), and the first rubber pad (210) is abutted and sealed against the tank opening at one end of the filter tank. A second rubber pad (220) is provided on one side of the second sealing plate (120) close to the first sealing plate (110), and the second rubber pad (220) is abutted and sealed against the tank opening at the other end of the filter tank.

6. A filter tank air tightness detection device according to claim 5, characterized in that: The first rubber pad (210) has a first through hole for accommodating the air intake pipe (150) to pass through, and the second rubber pad (220) has a second through hole for accommodating the air blocking pipe (160) to pass through.

7. The air tightness detection device for a filter tank according to claim 1, characterized in that: The air blocking pipe (160) comprises a main pipe section (230), a first branch pipe section (240) connected to the main pipe section (230), and a second branch pipe section (250); the main pipe section (230) is connected to the tank port of the filter tank; the air pressure gauge (170) is arranged in the first branch pipe section (240); the second branch pipe section (250) is provided with a switch valve (260); the switch valve (260) is used to open and close the second branch pipe section (250).

8. The air tightness detection device for a filter tank according to claim 1, characterized in that: The frame (100) comprises a frame body (270), a lifting frame (280) connected to the frame body (270) for sliding up and down, and a first screw rod (290) for driving the lifting frame (280) to move up and down, wherein the first screw rod (290) is rotationally connected to the frame body (270), the first screw rod (290) is threadedly connected to the lifting frame (280), and the sealing mechanism is arranged on the lifting frame (280).

9. The air tightness detection device for a filter tank according to claim 8, characterized in that: The lifting frame (280) comprises two support seats (300) arranged in parallel and a crossbeam (310) connecting the two support seats (300), the two support seats (300) respectively supporting the first sealing plate (110) and the second sealing plate (120), the frame body (270) is provided with a first groove (320) extending up and down, the first groove (320) is provided with a first bolt (330), and the first bolt (330) is threadedly connected to the support seat (300) to fix the support seat (300).

10. The air tightness detection device for a filter tank according to claim 8, characterized in that: The top end of the first screw rod (290) extends outside the frame (270), and a hand wheel (340) is provided at the top end of the first screw rod (290).

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