Sealing structure for air tightness measurement of civil air defense door

Abstract

The utility model relates to a sealing structure for air tightness measurement of a civil air defense door, which is suitable for sealing a through hole in a sealing plate and comprises a rocking handle extension bar and a sealing device, one end of the rocking handle lengthening rod penetrates through the through hole in the sealing plate and is connected with an operating handle on the civil defense door, and the other end of the rocking handle lengthening rod is located on the outer side of the sealing plate and is suitable for operating the operating handle through the rocking handle lengthening rod; the sealing device is arranged on the sealing plate, sleeves the rocking handle extension bar and covers the through hole; and a first sealing ring is arranged between the sealing device and the rocking handle extension bar. The sealing device covers the through hole and can seal and isolate the through hole, the first sealing ring is arranged between the rocking handle extension rod and the sealing device and can seal a gap between the rocking handle extension rod and the sealing device, and it is further ensured that no gas overflows from the through hole; the airtight performance of the lifting type entrance and exit civil air defense door can be measured reliably and accurately, and the manufacturing and installation cost of the airtight overpressure chamber is reduced.

Description

Technical Field

[0001] This application relates to the field of airtightness measurement technology for air-raid shelter doors, and in particular to a sealing structure for measuring the airtightness of air-raid shelter doors. Background Technology

[0002] Airtightness is a crucial indicator that must be tested for air defense doors, as it relates to the quality of their manufacturing and assembly. The typical airtightness measurement process for air defense doors involves closing the door leaf and locking it tightly to ensure a close fit between the door leaf and frame. A sealing plate is then used to seal the door leaf and frame on one side, creating a sealed space (overpressure chamber) between the sealing plate and the door leaf. An inflation device then pressurizes this sealed space through a connecting pipe, testing for overpressure and leakage. A higher leakage rate indicates poorer airtightness of the air defense door.

[0003] A type of lift-type entrance / exit air-raid shelter door consists of a door frame, door leaf, door lock, and lifting / sliding hinges. The operating handles for both the locking mechanism and the lifting / sliding hinges are located on the inner side of the door leaf. Therefore, a through-hole needs to be provided in the sealing plate to allow access to the sealed overpressure chamber during airtightness measurements to operate the operating handles on the air-raid shelter door. The sealing performance at the through-hole in the sealing plate is extremely important; a weak seal will affect the airtightness measurement results. Therefore, a special sealing structure needs to be designed at this location to ensure the airtightness performance can be tested. Summary of the Invention

[0004] In view of this, this application proposes a sealing structure for measuring the airtightness of air-raid shelter doors.

[0005] According to one aspect of this application, a sealing structure for measuring the airtightness of a civil defense door is provided, which is suitable for sealing through holes on a sealing plate, including: a crank extended rod and a sealing device;

[0006] One end of the extended handle passes through the through hole in the sealing plate and is connected to the operating handle on the air defense door. The other end of the extended handle is located on the outside of the sealing plate and is suitable for operating the operating handle through the extended handle.

[0007] The sealing device is installed on the sealing plate, and the sealing device is fitted with a crank extension rod and covers the through hole;

[0008] A first sealing ring is provided between the sealing device and the extended rod of the crank handle.

[0009] In one possible implementation, a square hole is provided at one end of the crank extension rod that connects to the operating handle, and the square hole matches the outer four sides of the operating handle.

[0010] In one possible implementation, the end of the crank extension rod away from the operating handle has an operating part protruding.

[0011] In one possible implementation, the sealing device is located on the side of the sealing plate facing away from the air-raid shelter door.

[0012] In one possible implementation, the sealing device includes: a detachably connected sealing cover and a sealing seat;

[0013] One side of the sealing seat is fixedly connected to the sealing plate, and the sealing seat is surrounded by a through hole;

[0014] The sealing cap covers the other side of the sealing seat and has a first clearance hole for passing through the crank extension rod.

[0015] In one possible implementation, the sealing device further includes: a second sealing ring;

[0016] The second sealing ring is located between the sealing cap and the sealing seat.

[0017] In one possible implementation, the sealing device further includes two or more screws; the sealing cap and the sealing seat are detachably connected by two or more screws.

[0018] In one possible implementation, the main body of the sealing seat has a ring-shaped structure, and two or more screws are arranged sequentially along the circumference of the sealing seat.

[0019] Beneficial effects: The sealing device of this application covers the through hole to seal and isolate it. The first sealing ring is set between the extended handle and the sealing device to seal the gap between them, further ensuring that no gas will escape from the through hole. This makes the airtightness measurement of the lifting entrance air defense door reliable and accurate, reduces the manufacturing and installation costs of the sealed overpressure chamber, and ensures that the entire airtightness testing process is simple and efficient, improving testing efficiency and reducing testing costs. The operating handle inside the sealed overpressure chamber can be rotated directly by rotating the extended handle on the outside of the sealing plate, eliminating the need for a person to reach through the through hole in the sealing plate to operate the handle inside the sealed overpressure chamber.

[0020] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0022] Figure 1 This diagram shows a structural diagram of a sealing structure for measuring the airtightness of a civil defense door according to an embodiment of this application;

[0023] Figure 2 This is a front view of the crank extension rod according to an embodiment of this application;

[0024] Figure 3 A side view of the crank extension rod according to an embodiment of this application is shown;

[0025] Figure 4 This shows a front view of the sealing seat according to an embodiment of this application;

[0026] Figure 5 A side view of the sealing seat according to an embodiment of this application is shown;

[0027] Figure 6 A side view of the sealing cap according to an embodiment of this application is shown;

[0028] Figure 7 This shows a front view of a civil defense door;

[0029] Figure 8 Show Figure 7 Side view;

[0030] Figure 9 A schematic diagram of a civil defense door airtightness measurement system is shown. Detailed Implementation

[0031] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0032] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0035] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0036] Figure 1 This application shows a structural diagram of a sealing structure for measuring the airtightness of a civil defense door according to an embodiment of the present application;

[0037] Figure 2 This is a front view of the crank extension rod according to an embodiment of this application; Figure 3 A side view of the crank extension rod according to an embodiment of this application is shown; Figure 4 This shows a front view of the sealing seat according to an embodiment of this application;

[0038] Figure 5 A side view of the sealing seat according to an embodiment of this application is shown; Figure 6 A side view of the sealing cap according to an embodiment of this application is shown; as follows: Figure 1 As shown, this sealing structure for measuring the airtightness of a civil defense door is suitable for sealing the through hole on the sealing plate 720. It includes: a crank extension rod 100 and a sealing device; one end of the crank extension rod 100 passes through the through hole on the sealing plate 720 and is suitable for connecting to the operating handle 730 on the civil defense door, and the other end of the crank extension rod 100 is located on the outside of the sealing plate 720, suitable for operating the operating handle 730 through the crank extension rod 100; the sealing device is disposed on the sealing plate 720, and the sealing device sleeves the crank extension rod 100 and covers the through hole; a first sealing ring 500 is provided between the sealing device and the crank extension rod 100.

[0039] Here, it should be noted that, as Figure 1As shown, the extended handle 100 passes through the through hole of the sealing plate 720 and extends into the sealed space (sealed overpressure chamber 700) between the sealing plate 720 and the door leaf 710. One end of the extended handle 100 is connected to the operating handle 730 on the door leaf 710 of the air-raid shelter door, while the other end of the extended handle 100 is located on the outside of the sealing plate 720. Therefore, rotating the extended handle 100 directly on the outside of the sealed overpressure chamber 700 can drive the operating handle 730 inside the sealed overpressure chamber 700 to rotate. Thus, the operating handle 730 can be operated directly through the extended handle 100, without the need for a person to pass through the through hole on the sealing plate 720 and extend their hand into the sealed overpressure chamber 700 to operate the operating handle 730 inside. Meanwhile, the sealing device covering the through hole can seal and isolate the through hole. The first sealing ring 500 is set between the crank extension rod 100 and the sealing device, which can seal the gap between the crank extension rod 100 and the sealing device, further ensuring that no gas will escape from the through hole, improving the sealing performance of the sealed overpressure chamber 700, making the sealing performance measurement of the lifting entrance and exit air defense door reliable and accurate, reducing the manufacturing cost of the sealed overpressure chamber 700, and ensuring that the entire sealing performance testing process is simple and efficient, improving testing efficiency. At the same time, the entire sealing structure has low manufacturing cost, simple structure, and wide application range.

[0040] In one possible implementation, such as Figure 2 and Figure 3 As shown, the main body of the crank extension rod 100 has a cylindrical structure. Furthermore, the length of the crank extension rod 100 is 230mm, and the diameter of the crank extension rod 100 is 40mm.

[0041] In one possible implementation, a square hole 110 is provided at one end of the crank extension rod 100 that connects to the operating handle 730. The square hole 110 matches the outer square of the operating handle 730. The crank extension rod 100 and the operating handle 730 are coaxially aligned, so that the outer square of the operating handle 730 is inserted into the square hole 110 of the crank extension rod 100, thereby realizing the connection between the crank extension rod 100 and the operating handle 730, and ensuring that the crank extension rod 100 can drive the operating handle 730 to rotate during rotation.

[0042] Furthermore, the length of the square hole 110 is 30mm; the width of the square hole 110 is 24mm.

[0043] In one possible implementation, the end of the crank extension 100 away from the operating handle 730 has an operating part 120 protruding from it. For example... Figure 2 As shown, the main body of the operating part 120 has a cuboid structure, and the length direction of the operating part 120 is parallel to the length direction of the crank extension rod 100. Furthermore, the length of the operating part 120 is 30 mm; the width of the operating part 120 is 24 mm.

[0044] Preferably, the crank extension rod 100 is made of 45# steel.

[0045] Preferably, the sealing device is located on the side of the sealing plate 720 away from the door leaf 710 of the air-raid shelter.

[0046] In one possible implementation, the sealing device includes: a detachably connected sealing cover 300 and a sealing seat 200; one side of the sealing seat 200 is fixedly connected to the sealing plate 720 and the sealing seat 200 surrounds a through hole; the sealing cover 300 covers the other side of the sealing seat 200 and has a first clearance hole 310 for the crank extension rod 100 to pass through. It should be noted that the detachable connection between the sealing cover 300 and the sealing seat 200 allows the sealing cover 300 to be opened at any time when the crank extension rod 100 is detached from the operating handle 730, so that the crank extension rod 100 can be adjusted and installed onto the operating handle 730.

[0047] In one possible implementation, such as Figure 4 and Figure 5 As shown, the main body of the sealing seat 200 is a disc structure. The sealing seat 200 has a second clearance hole 220, which is opposite to the through hole on the sealing plate 720. Furthermore, the diameter of the sealing seat 200 is 180mm and the thickness of the sealing seat 200 is 20mm.

[0048] Furthermore, the through hole on the sealing plate 720 is a circular hole with a diameter of 40mm; the main body of the second clearance hole 220 is an elongated oval hole structure, the length of the second clearance hole 220 is 82mm, the width of the second clearance hole 220 is 42mm, and the area of ​​the second clearance hole 220 is larger than the area of ​​the through hole on the sealing plate 720, so that the sealing seat 200 surrounds the through hole and the sealing cover 300 completely covers the through hole.

[0049] It should be noted that, as Figure 1 As shown, the side of the sealing seat 200 away from the sealing cover 300 is fixedly connected to the sealing plate 720 by welding.

[0050] In one possible implementation, such as Figure 6As shown, the main body of the sealing cover 300 is a disc structure, and the diameter of the sealing cover 300 is the same as the diameter of the sealing seat 200. A circular first clearance hole 310 is opened in the middle of the sealing cover 300. The first clearance hole 310 is coaxially opposite to the through hole of the sealing plate 720. It should be noted that the first clearance hole 310 matches the crank extension rod 100. The crank extension rod 100 passes through the first clearance hole 310, the second clearance hole 220, and the through hole of the sealing plate 720 in sequence and then enters the sealed overpressure chamber 700. Furthermore, the diameter of the sealing cover 300 is 180mm, the thickness of the sealing cover 300 is 12mm, and the diameter of the first clearance hole 310 is 40mm.

[0051] In one possible implementation, such as Figure 6 As shown, an annular first sealing ring mounting groove 320 is formed on the inner side of the sealing cover 300, and the first sealing ring 500 is placed in the first sealing ring mounting groove 320; the depth of the first sealing ring mounting groove 320 is 3mm; the width of the first sealing ring mounting groove 320 is 4.5mm. It should be noted that the setting of the first sealing ring mounting groove 320 can improve the installation stability of the first sealing ring 500 and prevent the first sealing ring 500 from shifting or even falling out of the first clearance hole 310 during the rotation of the crank extension rod 100.

[0052] Preferably, the sealing seat 200 and the sealing cover 300 are made of Q235 steel.

[0053] In one possible implementation, the sealing device further includes a second sealing ring 600; the second sealing ring 600 is located between the sealing cover 300 and the sealing seat 200. It should be noted that the second sealing ring 600 is used to seal the gap between the sealing cover 300 and the sealing seat 200, preventing air leakage due to incomplete sealing between the sealing cover 300 and the sealing seat 200. Further, as... Figure 6 As shown, the sealing cover 300 has a second sealing ring mounting groove 330 on the side facing the sealing seat 200. The main body of the second sealing ring mounting groove 330 is an annular groove structure, and the second sealing ring 600 is set at the same center as the sealing cover 300. Furthermore, the depth of the second sealing ring 600 is 3.5mm, and the width of the second sealing ring 600 is 7mm.

[0054] In one possible implementation, the sealing device further includes two or more screws 400; the sealing cover 300 and the sealing seat 200 are detachably connected by two or more screws 400. Further, the two or more screws 400 are arranged sequentially along the circumference of the sealing cover 300. It should be noted that the connection between the sealing cover 300 and the sealing seat 200 via screws 400 effectively ensures the firmness of the sealing cover 300 mounted on the sealing seat 200 and facilitates the easy removal of the sealing cover 300; moreover, the multiple screws 400 improve the uniformity of force on the sealing cover 300, ensuring that the sealing cover 300 presses against the sealing seat 200 in multiple directions, preventing one side of the sealing cover 300 from lifting and causing gaps between the sealing cover 300 and the sealing seat 200.

[0055] Furthermore, there are six screws in total, numbered 400. (As shown...) Figure 4 As shown, the sealing seat 200 has six first threaded holes 210, and the distance between the center of each of the six first threaded holes 210 and the center of the sealing seat 200 is 75mm, and the distance between any two adjacent first threaded holes 210 is the same. Similarly, the sealing cover 300 has six second threaded holes 340, and the distance between the center of each of the six second threaded holes 340 and the center of the sealing cover 300 is 75mm. All the first threaded holes 210 and all the second threaded holes 340 are matched with screws 400. When the sealing cover 300 covers the sealing seat 200, the six first threaded holes 210 and the six second threaded holes 340 correspond one-to-one, which is suitable for screwing in six screws 400 respectively.

[0056] like Figure 8 and Figure 9 The diagram shows the structure of an airtightness measurement system for a civil defense door. The civil defense door includes a door frame 711 and a door leaf 710. A sealing plate 720 is installed behind the door frame 711, forming a sealed space (sealed overpressure chamber 700) between the sealing plate 720 and the entire civil defense door. An air compressor 750 pressurizes the sealed overpressure chamber 700 by introducing air through an air inlet pipe. When the gas pressure in the sealed overpressure chamber 700 stabilizes at a set overpressure value, overpressure value and leakage tests are performed. A tilting micromanometer 760 can measure the overpressure value of the sealed overpressure chamber 700, and the measured leakage can be read by a flow meter 740 connected in series with the air inlet pipe. This leakage represents the airtightness performance of the civil defense door; the greater the leakage, the worse the airtightness.

[0057] like Figure 7As shown, a door leaf 710 of a civil defense door is provided with multiple operating handles 730, which are used to control the opening or closing of the door lock and the movement of the lifting and sliding hinge components of the civil defense door respectively. A through hole is provided on the sealing plate 720 directly opposite each operating handle 730. In summary, this application can be installed between these through holes and the operating handles 730. Under the function of this application, the operating handles 730 can be operated normally while ensuring that the airtightness measurement results will not be inaccurate due to the through holes in the sealing plate 720.

[0058] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A sealing structure for air tightness measurement of a civil defense door, characterized by, The application is suitable for sealing the through hole on the sealing plate, comprising a handle extension rod and a sealing device. One end of the handle extension rod penetrates the through hole on the sealing plate and is connected with the operating handle on the civil air defense door, and the other end of the handle extension rod is located outside the sealing plate and is suitable for operating the operating handle through the handle extension rod. The sealing device is arranged on the sealing plate, and the sealing device covers the through hole and the handle extension rod. A first sealing ring is arranged between the sealing device and the handle extension rod.

2. The sealing structure for air tightness measurement of a civil defense door according to claim 1, wherein A square hole is arranged on the end of the handle extension rod connected with the operating handle, and the square hole is matched with the outer four sides of the operating handle.

3. The sealing structure for air tightness measurement of a civil defense door according to claim 1, wherein An operating part is arranged on the end of the handle extension rod away from the operating handle.

4. The sealing structure for air tightness measurement of a civil defense door according to claim 1, wherein The sealing device is arranged on the side of the sealing plate away from the civil air defense door.

5. The sealing structure for air tightness measurement of a civil defense door according to claim 4, wherein The sealing device comprises a detachable sealing cover and a sealing seat. One side of the sealing seat is fixedly connected with the sealing plate, and the sealing seat surrounds the through hole. The sealing cover covers the other side of the sealing seat and is provided with a first gap hole suitable for penetrating the handle extension rod.

6. The sealing structure for air tightness measurement of a civil defense door according to claim 5, wherein The sealing device further comprises a second sealing ring. The second sealing ring is located between the sealing cover and the sealing seat.

7. The sealing structure for air tightness measurement of a civil defense door according to claim 5, wherein The sealing device further comprises two or more screws.

8. The sealing structure for air tightness measurement of a civil defense door according to claim 7, wherein The sealing cover and the sealing seat are detachably connected through the two or more screws. The main body of the sealing cover is in a circular ring structure, and the two or more screws are sequentially arranged along the circumference of the sealing cover.

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