Airtightness detection equipment for closed equipment for civil air defense engineering

Abstract

The invention discloses airtight equipment airtightness detection equipment for civil air defense engineering, and belongs to the technical field of detection of airtight equipment for civil air defense engineering. A closed equipment air tightness detection device for civil air defense engineering comprises a device body used for forming a sealed space with civil air defense closed equipment, the device body comprises an abutting assembly used for being matched with a door opening, an installation area is formed at the abutting assembly, and an abutting piece is arranged in the installation area. The abutting piece is used for making the abutting assembly make close contact with the inner side wall of the periphery of the door opening. A sealing plate is detachably arranged at the mounting area and is used for sealing the mounting area. Compared with the prior art, the mode that the abutting assemblies make close contact with the inner side walls of the periphery of the door opening is adopted, internal stable fixing is achieved through the abutting pieces, the defect that in a traditional method, holes need to be punched in the ground or the wall face to fix the sealing plate is overcome, the integrity of the civil air defense construction wall is protected, the mounting and dismounting processes are simplified, and the construction efficiency is improved. And the damage of construction to the original structure is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of closed equipment detection for civil air defense projects, and in particular to an air tightness detection device for closed equipment for civil air defense projects. Background Art

[0002] Air-defense enclosed equipment refers to protective equipment installed on the walls of civil air defense projects at personnel and vehicle entrances and exits, ventilation holes, etc. Air-defense enclosed equipment has a protective function and can resist shock waves. It also has airtight performance and needs to be airtight when fully closed to prevent biochemical gas attacks. Therefore, after the main construction of the civil air defense project is completed and the installation and commissioning of the air-defense enclosed equipment is completed, it is necessary to conduct airtightness testing on the air-defense enclosed equipment.

[0003] The air tightness detection equipment in the related technology needs to be equipped with a sealing plate to form a sealed space between the civil air defense sealing equipment. The sealing plate needs to be abutted against the wall of the civil air defense project during installation. The existing technology requires fixing the sealing plate by drilling holes in the ground or wall, which causes damage to the wall or ground and affects the original structure. Summary of the invention

[0004] The present invention provides an air tightness detection device for closed equipment used in civil air defense projects, which can overcome certain defects of the prior art.

[0005] According to the present invention, an airtightness detection device for airtight equipment used in civil air defense engineering includes a device body used to form a sealed space with the airtight equipment for civil air defense, the device body includes an abutment component used to cooperate with the door opening, an installation area is formed at the abutment component, and a fastening member is provided in the installation area, and the fastening member is used to make the abutment component in close contact with the inner side wall around the door opening;

[0006] A sealing plate is detachably provided at the installation area, and the sealing plate is used to seal the installation area.

[0007] Preferably, it also includes a pressure gas source device for introducing gas into the sealed space;

[0008] A pressure regulating valve for regulating the pressure in a sealed space;

[0009] An airtightness detection device for detecting the airtightness of a sealed space.

[0010] Through the above structure, the equipment can introduce gas into the sealed space through the pressure gas source device to simulate the pressure environment in actual use, making the detection process closer to the actual situation and being able to more accurately evaluate the sealing performance of the civil air defense closed equipment. At the same time, the addition of the pressure regulating valve enables the equipment to accurately adjust the pressure in the sealed space to meet different detection needs. Whether it is routine detection or testing under specific pressure conditions, it can be achieved by adjusting the pressure regulating valve, thereby improving the flexibility and accuracy of the detection.

[0011] Preferably, the abutment assembly includes a top abutment plate for cooperating with the top wall of the door opening, a side abutment plate for cooperating with the side walls on both sides of the door opening, and a bottom abutment plate for cooperating with the bottom wall of the door opening, and the installation area is composed of the top abutment plate, the side abutment plates on both sides, and the bottom abutment plate.

[0012] Through the above structure, the top support plate, side support plate and bottom support plate are tightly matched with the top wall, side walls and bottom wall of the door opening respectively, effectively reducing the gap between the installation area and the door opening, thereby improving the overall sealing performance, and can also be adapted according to the sizes and shapes of different door openings.

[0013] Preferably, the side abutment plates and the top abutment plates both have hanging plates which are arranged perpendicularly to the side abutment plates and are used to cooperate with the outer wall of the door opening. The side of the side abutment plates in contact with the side wall of the door opening is provided with a first adhesive layer, and the first adhesive layer is used to fully contact with the side wall of the door opening.

[0014] Through the above structure, the setting of the hanging plate enables the side abutment plate and the top abutment plate to be hung on the outer wall of the door opening more firmly. The hanging plate is vertically arranged to the side abutment plate and the top abutment plate, which not only increases the contact area with the outer wall of the door opening, but also provides additional supporting force to prevent the abutment component from being displaced or falling off during the installation process. At the same time, the setting of the first adhesive layer makes the contact between the side abutment plate and the side wall of the door opening closer. The first adhesive layer can fill the tiny gap between the side abutment plate and the side wall of the door opening to form a seal, thereby effectively preventing the leakage of gas.

[0015] Preferably, the side support plates, top support plates and bottom support plates all have a first clamping plate which is arranged perpendicularly to the side support plates, top support plates and bottom support plates and is located in the installation area. Adjacent first clamping plates jointly form a rectangular installation portion for installing the sealing plate. A first sealing strip is provided on the side of the rectangular installation portion away from the installation area. The side support plates, top support plates and bottom support plates are all provided with a second sealing strip on the side close to the first sealing strip. The second sealing strip and the first sealing strip are used together to fully contact the outer wall of the sealing plate.

[0016] Through the above structure, the side abutment plates, the top abutment plates and the bottom abutment plates together form a stable frame for supporting and positioning the sealing plate, so that the sealing plate can be accurately placed in a predetermined position to ensure its stability and sealing.

[0017] Preferably, both ends of the top abutment plate have a first inclined surface, and both ends of the side abutment plate and the bottom abutment plate have a second inclined surface, and the first inclined surface cooperates with the second inclined surface to form a right angle.

[0018] Through the above structure, when the top support plate, the side support plate and the bottom support plate are combined together, their first inclined surfaces and the second inclined surfaces will cooperate with each other to form a right-angle structure, ensuring precise alignment and firm connection between the plates, and avoiding looseness or misalignment during use. It can be understood that the right-angle structure can provide stronger structural stability and load-bearing capacity.

[0019] Preferably, the clamping member includes two clamping rods hinged to each other, both ends of the clamping rods have threaded grooves, the inner threads of the threaded grooves are provided with threaded rods with adjustable lengths, and the threaded rods are rotated at one end away from the threaded grooves to be provided with a contact plate for contacting the inner walls of the side support plates, the top support plates and the bottom support plates, and the threaded rods are threadedly connected with fastening rings for limiting the threaded rods after the length of the threaded rods is adjusted.

[0020] Through the above structure, the abutment is composed of two mutually hinged abutment rods, so that the abutment can flexibly adjust its shape and position within a certain range to adapt to abutment components of different shapes and sizes, that is, support of door opening shapes.

[0021] Preferably, a plurality of fasteners for limiting the sealing plate are detachably provided at the side support plates and the top support plates, through holes are provided at the side support plates and the top support plates, and sockets corresponding to the through holes are formed on the side walls of the sealing plates, and a mating cavity is provided in the sealing plate which is vertically connected to the sockets and cooperates with the fasteners.

[0022] Through the above structure, the sealing plate can be easily disassembled and reinstalled, which is convenient for maintenance and replacement of the sealing plate, while also improving the flexibility and reusability of the entire structure.

[0023] Preferably, the fastener includes a pin, which has a threaded portion and a plug-in portion, the threaded portion is rotatably provided with an abutment ring that cooperates with the pin, a sliding cavity that passes through one end of the threaded portion is formed in the pin, a plurality of through openings that are equidistantly provided along the circumferential direction and communicate with the sliding cavity, a clamping block is rotatably provided in the through opening, a convex portion is formed near the bottom of the rotating end of the clamping block; an unlocking rod is plugged into the sliding cavity, a spring is provided between one end of the unlocking rod and the sliding cavity, the spring is used for providing elastic force to keep the unlocking rod tightened, a recess corresponding to the plurality of clamping blocks is formed on the side wall of the unlocking rod, the recess cooperates with the convex portion, and the recess is used for driving the clamping block to rotate away from or into the through opening.

[0024] Through the above structure, the fastener can be installed and removed more conveniently, by inserting the latch into the side abutment plate or the top abutment plate and the sealing plate, and then rotating the abutment ring away from the locking or rotating the side abutment plate or the top abutment plate. The fastener has two forms when in use;

[0025] Preferably, the length of the plug-in portion of the bolt is smaller than the length of the matching cavity, which can facilitate the installation and removal of the bolt.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. Compared with the existing technology, the method of closely contacting the inner wall around the door opening with the abutment component and firmly fixing the inside with the abutment component avoids the disadvantage of drilling holes in the ground or wall to fix the sealing plate in the traditional method. It not only protects the integrity of the wall of the civil air defense project, but also simplifies the installation and disassembly process and reduces the damage to the original structure caused by the construction;

[0028] 2. The arrangement of the abutment assembly and the abutment member enables the device body to be suitable for door openings of different sizes and shapes, thus enhancing the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic diagram of the overall structure of an airtightness detection device for enclosed equipment used in civil air defense projects.

[0030] Figure 2 The present invention is a schematic diagram of the overall front cross-sectional structure of an airtightness detection device for closed equipment used in civil air defense projects.

[0031] Figure 3 The present invention is a schematic diagram of the structure of a fastening member and abutment assembly of an airtightness detection device for enclosed equipment used in civil air defense projects.

[0032] Figure 4 The present invention is a schematic diagram of the side abutment structure of an airtightness detection device for enclosed equipment used in civil air defense projects.

[0033] Figure 5 The present invention is a schematic diagram of the bottom support plate structure of an airtightness detection device for enclosed equipment used in civil air defense projects.

[0034] Figure 6 The present invention is a schematic diagram of the fastener structure of an airtightness detection device for enclosed equipment used in civil air defense projects.

[0035] Figure 7 The present invention is a schematic diagram of the cross-sectional structure of fasteners of an airtightness detection device for enclosed equipment used in civil air defense projects.

[0036] 100, device body; 110, side abutment plate; 120, top abutment plate; 130, bottom abutment plate; 140, sealing plate; 150, fastener; 210, matching cavity; 310, abutment rod; 320, threaded rod; 330, contact plate; 340, fastening ring; 410, hanging plate; 420, first adhesive layer; 430, first sealing strip; 440, clamping plate; 450, second sealing strip; 460, first inclined surface; 510, second inclined surface; 610, latch; 620, abutment ring; 630, unlocking rod; 710, sliding cavity; 720, spring; 730, through-port; 740, clamping block; 750, convex portion; 760, concave portion. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0038] Example 1

[0039] See also Figure 1-7 The present embodiment provides an air tightness detection device for airtight equipment used in civil air defense engineering, which includes a device body 100 for forming a sealed space with the airtight equipment for civil air defense, and the device body 100 includes an abutment component for cooperating with a door opening, and an installation area is formed at the abutment component, and a fastening member is provided in the installation area, and the fastening member is used to make the abutment component in close contact with the inner side wall around the door opening;

[0040] A sealing plate 140 is detachably provided at the installation area, and the sealing plate 140 is used to seal the installation area.

[0041] When the air tightness detection device for closed equipment for civil air defense projects disclosed in the present invention is used, the abutment component is installed in a door opening matched with the closed equipment to be detected, and the abutment component is pressed against the inner side walls around the door opening by abutment parts to ensure that there is no gap between the abutment component and the inner side walls around the door opening, and then the sealing plate 140 is installed in the installation area, and the sealing plate 140 and the abutment component are connected and sealed by fasteners 150, so as to ensure that a sealed space is formed between the device body 100 and the civil air defense closed equipment. Compared with the prior art, the abutment component is in close contact with the inner side walls around the door opening, and the internal fixation is achieved by abutment parts, which avoids the disadvantage of the traditional method of needing to drill holes in the ground or wall to fix the sealing plate 140, which not only protects the integrity of the wall of the civil air defense project, but also simplifies the installation and disassembly process, and reduces the damage to the original structure caused by construction.

[0042] At the same time, the arrangement of the abutment assembly and the abutment member enables the device body 100 to be suitable for door openings of different sizes and shapes, thereby enhancing the versatility and flexibility of the device.

[0043] In this embodiment, it also includes a pressure gas source device for introducing gas into the sealed space;

[0044] A pressure regulating valve for regulating the pressure in a sealed space;

[0045] An airtightness detection device for detecting the airtightness of a sealed space.

[0046] Among them, the pressure gas source device can fill the sealed space with gas to form an overpressure environment in the sealed space. In this embodiment, the pressure gas source device uses an air pump; the pressure regulating valve can adjust the pressure in the sealed space to ensure the normal progress of the detection, and the pressure regulating valve is arranged on the pipeline between the air pump and the sealing device; the airtightness detection device includes a digital airtightness detector and an airtightness detection control system. A pressure pipeline and a pressure measuring pipeline are connected between the digital airtightness detector and the sealing device. The airtightness detection control system can control the digital airtightness detector to input gas and measure pressure. The airtightness detection control system is used on a PC. The digital airtightness detector and the airtightness detection control system are both existing technologies, so in this embodiment, they will not be described in detail.

[0047] Through the above structure, the equipment can introduce gas into the sealed space through the pressure gas source device to simulate the pressure environment in actual use, making the detection process closer to the actual situation and being able to more accurately evaluate the sealing performance of the civil air defense closed equipment. At the same time, the addition of the pressure regulating valve enables the equipment to accurately adjust the pressure in the sealed space to meet different detection needs. Whether it is routine detection or testing under specific pressure conditions, it can be achieved by adjusting the pressure regulating valve, thereby improving the flexibility and accuracy of the detection.

[0048] In this embodiment, the abutment assembly includes a top abutment plate 120 for cooperating with the top wall of the door opening, a side abutment plate 110 for cooperating with the side walls on both sides of the door opening, and a bottom abutment plate 130 for cooperating with the bottom wall of the door opening. The installation area is composed of the top abutment plate 120, the side abutment plates 110 on both sides, and the bottom abutment plate 130.

[0049] Through the above structure, the top support plate 120, the side support plate 110 and the bottom support plate 130 are tightly matched with the top wall, the side walls and the bottom wall of the door opening respectively, which effectively reduces the gap between the installation area and the door opening, thereby improving the overall sealing performance, and can also be adapted according to the sizes and shapes of different door openings.

[0050] In this embodiment, the side abutment plate 110 and the top abutment plate 120 both have a hanging plate 410 which is vertically arranged with the side abutment plate 110 and the top abutment plate 120 and is used to cooperate with the outer wall of the door opening. The side of the side abutment plate 110 in contact with the side wall of the door opening is provided with a first adhesive layer 420, and the first adhesive layer 420 is used to fully contact with the side wall of the door opening.

[0051] Through the above structure, the setting of the hanging plate 410 enables the side abutment plate 110 and the top abutment plate 120 to be hung on the outer wall of the door opening more firmly. The hanging plate 410 is vertically arranged to the side abutment plate 110 and the top abutment plate 120, which not only increases the contact area with the outer wall of the door opening, but also provides additional supporting force to prevent the abutment assembly from being displaced or falling off during the installation process. At the same time, the setting of the first adhesive layer 420 makes the contact between the side abutment plate 110 and the side wall of the door opening closer. The first adhesive layer 420 can fill the tiny gap between the side abutment plate 110 and the side wall of the door opening to form a seal, thereby effectively preventing the gas from leaking out.

[0052] In this embodiment, the side support plate 110, the top support plate 120 and the bottom support plate 130 all have a first clamping plate 440 which is vertically arranged with the side support plate 110, the top support plate 120 and the bottom support plate 130 and is located in the installation area. The adjacent first clamping plates 440 together form a rectangular installation portion for installing the sealing plate 140. The first sealing strip 430 is provided on the side of the rectangular installation portion away from the installation area. The side support plate 110, the top support plate 120 and the bottom support plate 130 close to the first sealing strip 430 are all provided with a second sealing strip 450. The second sealing strip 450 and the first sealing strip 430 are used together to fully contact the outer wall of the sealing plate 140.

[0053] Through the above structure, the side support plate 110, the top support plate 120 and the bottom support plate 130 together form a stable frame for supporting and positioning the sealing plate 140, so that the sealing plate 140 can be accurately placed in a predetermined position to ensure its stability and sealing.

[0054] Among them, the first sealing strip 430 is located on the side of the rectangular mounting portion away from the mounting area. Its function is to ensure a close contact surface between the sealing plate 140 and the mounting frame, thereby enhancing the sealing effect and fully contacting the outer wall of the sealing plate 140 to prevent gas leakage.

[0055] The provision of the second sealing strip 450 further enhances the sealing effect and forms sufficient contact with the outer wall of the sealing plate 140 , thereby ensuring comprehensive sealing between the sealing plate 140 and the mounting frame.

[0056] In this embodiment, both ends of the top abutment plate 120 have a first inclined surface 460 , and both ends of the side abutment plate 110 and the bottom abutment plate 130 have a second inclined surface 510 . The first inclined surface 460 cooperates with the second inclined surface 510 to form a right angle.

[0057] Through the above structure, when the top support plate 120, the side support plate 110 and the bottom support plate 130 are combined together, their first inclined surfaces 460 and the second inclined surfaces 510 will cooperate with each other to form a right-angle structure, ensuring precise alignment and firm connection between the panels, and avoiding looseness or misalignment during use. It can be understood that the right-angle structure can provide stronger structural stability and load-bearing capacity.

[0058] In this embodiment, the clamping member includes two clamping rods 310 hinged to each other, and both ends of the clamping rods 310 have threaded grooves. The inner threads of the threaded grooves are provided with threaded rods 320 with adjustable lengths. The threaded rods 320 are rotatably provided with a contact plate 330 at one end away from the threaded grooves for contacting the inner walls of the side abutment plates 110, the top abutment plates 120 and the bottom abutment plates 130. The threaded rods 320 are threadedly connected with fastening rings 340, and the fastening rings 340 are used to limit the threaded rods 320 after the length is adjusted.

[0059] Through the above structure, the abutting member is composed of two abutting rods 310 hinged to each other, so that the abutting member can flexibly adjust its shape and position within a certain range to adapt to abutment components of different shapes and sizes, that is, support of door opening shapes.

[0060] In this embodiment, a plurality of fasteners 150 for limiting the sealing plate 140 are detachably provided at the side abutment plate 110 and the top abutment plate 120, through holes are provided at the side abutment plate 110 and the top abutment plate 120, and a plug hole corresponding to the through hole is formed on the side wall of the sealing plate 140, and a mating cavity 210 is provided in the sealing plate 140 which is vertically connected to the plug hole and cooperates with the fastener 150.

[0061] Through the above structure, the sealing plate 140 can be easily disassembled and reinstalled, which is convenient for maintenance and replacement of the sealing plate 140, while also improving the flexibility and reusability of the entire structure.

[0062] In this embodiment, the fastener 150 includes a latch 610, which has a threaded portion and a plug-in portion. The threaded portion is rotatably provided with an abutment ring 620 that cooperates with it. A sliding cavity 710 that passes through one end of the threaded portion is formed in the latch 610. A plurality of through openings 730 that pass through the sliding cavity 710 are equidistantly provided at the plug-in portion along the circumferential direction. A clamping block 740 is rotatably provided in the through opening 730. A convex portion 750 is formed near the bottom of the rotating end of the clamping block 740. An unlocking rod 630 is inserted into the sliding cavity 710. A spring 720 is provided between one end of the unlocking rod 630 and the sliding cavity 710. The spring 720 is used to provide an elastic force to keep the unlocking rod 630 tightened. A recess 760 corresponding to the plurality of clamping blocks 740 is formed on the side wall of the unlocking rod 630. The recess 760 cooperates with the convex portion 750. The recess 760 is used to drive the clamping block 740 to rotate away from or into the through opening 730.

[0063] Through the above structure, the fastener 150 can be installed and removed more conveniently. After the latch 610 is inserted into the side abutment plate 110 or the top abutment plate 120 and the sealing plate 140, the abutment ring 620 is rotated away from the locking or rotation of the side abutment plate 110 or the top abutment plate 120. The fastener 150 has two forms when in use.

[0064] Locking: When the latch 610 passes through the corresponding holes of the side support plate 110 or the top support plate 120 and the sealing plate 140, the block 740 is compressed under the action of the spring 720 so that the unlocking rod 630 drives the block 740 to reset, and the block 740 cooperates with the structure in the cavity 210 of the sealing plate 140 to prevent the latch 610 from being pulled out, thereby achieving locking.

[0065] Unlocking: When the sealing plate 140 needs to be removed, the unlocking rod 630 is pushed toward the inside of the latch 610 by external force to compress the spring 720. At this time, the recess 760 on the unlocking rod 630 contacts the protrusion 750 of the block 740 and drives the block 740 to rotate, so that it moves from the locked position into the through opening 730, thereby releasing the cooperation with the structure in the cavity 210 of the sealing plate 140. Subsequently, the latch 610 can be easily pulled out from the hole in the side abutment plate 110 or the top abutment plate 120 and the sealing plate 140.

[0066] In this embodiment, the length of the plug-in portion of the plug 610 is shorter than the length of the matching cavity 210, so that the installation and removal of the plug 610 can be facilitated.

[0067] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0068] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. An air tightness detection device for closed equipment used in civil air defense projects, characterized in that: The invention comprises a device body (100) for forming a sealed space with a closed civil air defense device, the device body (100) comprising an abutment component for cooperating with a door opening, an installation area being formed at the abutment component, a fastening member being provided in the installation area, the fastening member being used to bring the abutment component into close contact with the inner side wall around the door opening; A sealing plate (140) is detachably provided at the installation area, and the sealing plate (140) is used to seal the installation area.

2. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 1 is characterized by: Also included is a pressure gas source device for introducing gas into the sealed space; A pressure regulating valve for regulating the pressure in a sealed space; An airtightness detection device for detecting the airtightness of a sealed space.

3. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 1 is characterized by: The abutment assembly comprises a top abutment plate (120) for cooperating with the top wall of the door opening, a side abutment plate (110) for cooperating with the side walls on both sides of the door opening, and a bottom abutment plate (130) for cooperating with the bottom wall of the door opening, and the installation area is jointly constituted by the top abutment plate (120), the side abutment plates (110) on both sides, and the bottom abutment plate (130).

4. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 3 is characterized by: The side abutment plate (110) and the top abutment plate (120) both have a hanging plate (410) which is arranged perpendicularly to the side abutment plate (110) and the top abutment plate (120) and is used to cooperate with the outer wall of the door opening. The side of the side abutment plate (110) in contact with the side wall of the door opening is provided with a first adhesive layer (420), and the first adhesive layer (420) is used to fully contact with the side wall of the door opening.

5. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 4 is characterized by: The side abutment plates (110), the top abutment plates (120) and the bottom abutment plates (130) all have a first clamping plate (440) which is vertically arranged with the side abutment plates (110), the top abutment plates (120) and the bottom abutment plates (130) and is located in the installation area. The adjacent first clamping plates (440) together form a rectangular installation portion for installing the sealing plate (140). The first sealing strip (430) is provided on the side of the rectangular installation portion away from the installation area. The side abutment plates (110), the top abutment plates (120) and the bottom abutment plates (130) are all provided with a second sealing strip (450) on the side close to the first sealing strip (430). The second sealing strip (450) and the first sealing strip (430) are used together to fully contact the outer wall of the sealing plate (140).

6. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 3 is characterized by: Both ends of the top abutment plate (120) have first inclined surfaces (460), and both ends of the side abutment plate (110) and the bottom abutment plate (130) have second inclined surfaces (510), and the first inclined surfaces (460) and the second inclined surfaces (510) cooperate to form a right angle.

7. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 1 is characterized by: The clamping member comprises two clamping rods (310) hinged to each other, both ends of the clamping rods (310) are provided with thread grooves, the inner threads of the thread grooves are provided with threaded rods (320) with adjustable lengths, and the threaded rods (320) are provided with a contact plate (330) for contacting the inner walls of the side abutment plates (110), the top abutment plates (120) and the bottom abutment plates (130) at one end of the threaded rods (320) away from the thread grooves, and the threaded rods (320) are threadedly connected with a fastening ring (340), and the fastening ring (340) is used to limit the threaded rods (320) after the length is adjusted.

8. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 1 is characterized by: A plurality of fasteners (150) for limiting the sealing plate (140) are detachably provided at the side abutment plates (110) and the top abutment plates (120); through holes are provided at the side abutment plates (110) and the top abutment plates (120); a plug hole corresponding to the through hole is formed on the side wall of the sealing plate (140); and a matching cavity (210) is provided in the sealing plate (140) and is vertically connected to the plug hole and matched with the fastener (150).

9. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 8, characterized in that: The fastener (150) comprises a latch (610), the latch (610) having a threaded portion and a plug-in portion, the threaded portion being rotatably provided with an abutment ring (620) cooperating therewith, a sliding cavity (710) penetrating one end of the threaded portion being formed in the latch (610), a plurality of through openings (730) being equidistantly provided along the circumferential direction at the plug-in portion and communicating with the sliding cavity (710), a clamping block (740) being rotatably provided in each of the through openings (730), a convex portion (750) being formed near the bottom of the rotating end of the clamping block (740) 0); an unlocking rod (630) is inserted into the sliding cavity (710), and a spring (720) is provided between one end of the unlocking rod (630) and the sliding cavity (710), and the spring (720) is used to provide an elastic force to keep the unlocking rod (630) taut, and a recess (760) corresponding to a plurality of blocks (740) is formed on the side wall of the unlocking rod (630), and the recess (760) cooperates with the protrusion (750), and the recess (760) is used to drive the block (740) to rotate away from or into the opening (730).

10. The air tightness detection device for airtight equipment used in civil air defense engineering according to claim 9, characterized in that: The length of the insertion portion of the plug pin (610) is smaller than the length of the matching cavity (210).

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