Steel structure civil air defense door

Abstract

The invention provides a steel structure civil air defense door and belongs to the field of steel structure civil air defense doors, the steel structure civil air defense door comprises a door frame and a civil air defense door body arranged on the door frame, the civil air defense door body is rotatably connected to the door frame, and the steel structure civil air defense door is characterized in that four sets of sealing grooves are formed in the inner wall of the door frame, and second sealing strips are arranged on the inner walls of the four sets of sealing grooves; the sealing mechanism is arranged in the cavity; the locking mechanism is arranged on the side walls of the door frame and the civil air defense door, the sealing mechanism is provided with the sealing mechanism, the sealing mechanism inflates compressed air into an air bag through an air pump, the air bag is expanded, the air bag drives a first sealing strip to be extruded into a sealing groove and matched with a second sealing strip, and therefore the civil air defense door can be tightly attached to the door frame; the elastic sealing layer is formed, the sealing strip cannot be damaged due to extrusion, the sealing effect cannot be affected after long-term use, and therefore the protection effect can be improved.

Description

Technical Field

[0001] The present invention relates to the field of steel structure civil air defense doors, and more specifically, to a steel structure civil air defense door. Background Art

[0002] Civil air defense doors are the doors at the entrances and exits of civil air defense projects. The classification of civil air defense doors is relatively distinct, including various civil air defense equipment such as ordinary single and double leaf airtight blast doors and airtight doors, and single and double leaf airtight blast doors and airtight doors with movable thresholds. Most current civil air defense doors are made of steel structures, thus having strong impact resistance and excellent protection performance.

[0003] Currently, the sealing between the civil air defense door and the door frame mostly uses sealing rubber strips. When the civil air defense door is closed, due to the heavy weight of the civil air defense door, the sealing rubber strip will be greatly squeezed. After long-term compression, it cannot fully return to its original shape, and in severe cases, the sealing rubber strip will be damaged, resulting in an increase in the sealing gap and affecting the protection effect. How to invent a steel structure civil air defense door to improve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] To make up for the above deficiencies, the present invention provides a steel structure civil air defense door, aiming to improve the problem that the sealing between the current civil air defense door and the door frame mostly uses sealing rubber strips. When the civil air defense door is closed, due to the heavy weight of the civil air defense door, the sealing rubber strip will be greatly squeezed. After long-term compression, it cannot fully return to its original shape, and in severe cases, the sealing rubber strip will be damaged, resulting in an increase in the sealing gap and affecting the protection effect.

[0005] The present invention is implemented as follows:

[0006] The present invention provides a steel structure civil air defense door, including a door frame and a civil air defense door provided on the door frame. The civil air defense door is rotatably connected to the door frame. Characteristically, four groups of sealing grooves are provided on the inner wall of the door frame, and second sealing strips are provided on the inner walls of the four groups of sealing grooves. It further includes: a sealing mechanism, a cavity is provided inside the civil air defense door, and the sealing mechanism is provided inside the cavity; a locking mechanism: the locking mechanism is provided on the side walls of the door frame and the civil air defense door.

[0007] Preferably, the sealing mechanism includes a fixed frame fixedly arranged on the inner wall of the cavity. A first airbag is arranged inside the fixed frame. Four groups of pressing plates are arranged on the side wall of the first airbag. An air inlet pipe and an air outlet pipe are arranged on the first airbag. An air pump is arranged on the side wall of the civil air defense door. One end of the air inlet pipe is connected to one end of the air pump. A control valve is arranged on the outer side wall of the air outlet pipe. Four groups of first sealing strips that cooperate with the sealing groove are movably penetrated through the outer side wall of the civil air defense door. Two groups of movable rods are arranged on the inner side walls of the four groups of first sealing strips. One end of the movable rod penetrates through the side wall of the fixed frame and is connected to the side wall of the pressing plate. A spring is sleeved on the outer wall of the movable rod. One end of the spring is connected to the inner side wall of the fixed frame. The other end of the spring is connected to the side wall of the pressing plate. A control button is arranged on the side wall of the civil air defense door.

[0008] Preferably, the first airbag is made of silicone rubber material, the pressing plate is made of aluminum alloy material, and the pressing plate is adhered to the outer side wall of the first airbag through glue.

[0009] Preferably, the locking mechanism includes a mounting block arranged on the side wall of the door frame. A locking hole is opened at the bottom of the mounting block. A fixed box is arranged on the side wall of the civil air defense door. A movable plate is slidably connected inside the fixed box. A locking rod is arranged on the top of the movable plate. One end of the locking rod penetrates through the inner top of the fixed box and is inserted into the locking hole. A return spring is sleeved on the outer wall of the locking rod. A second airbag is arranged inside the fixed box. An inflation pipe and an exhaust pipe are arranged on the outer side wall of the second airbag. One end of the inflation pipe is communicated with the air inlet pipe. The exhaust pipe is communicated with the air outlet pipe.

[0010] Preferably, a one-way valve is arranged inside the exhaust pipe.

[0011] Preferably, the outer side wall of the second airbag is connected to the side wall of the movable plate, and the second airbag is arranged below the movable plate.

[0012] Preferably, two groups of guiding grooves are opened on the side wall of the fixed box, and two groups of guiding blocks that match the guiding grooves are arranged on the side wall of the movable plate.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. By setting the sealing mechanism, the sealing mechanism fills compressed air into the airbag through the air pump, making the airbag expand. The airbag drives the first sealing strip to be pressed into the sealing groove and cooperate with the second sealing strip, so that the civil air defense door can closely fit the door frame to form an elastic sealing layer. The sealing strip will not be damaged due to extrusion, and the sealing effect will not be affected after long-term use, thereby improving the protection effect.

[0015] 2. By providing a locking mechanism linked to the sealing mechanism, the present invention can lock the civil air defense door while sealing the civil air defense door and the door frame, restrict the displacement of the civil air defense door, avoid seal failure caused by external forces, and further improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 FIG. 9 is a schematic diagram of the overall structure of a steel structure civil air defense door provided by an embodiment of the present invention;

[0018] Figure 2 FIG. 13 is a right view of the overall structure of a steel structure civil air defense door provided by an embodiment of the present invention;

[0019] Figure 3 FIG. 17 is a schematic diagram of the air pump and fixed box structure of a steel structure civil air defense door provided by an embodiment of the present invention;

[0020] Figure 4 FIG. 21 is a schematic diagram of the internal structure of the cavity of a steel structure civil air defense door provided by an embodiment of the present invention;

[0021] Figure 5 FIG. 25 is a schematic diagram of the internal structure of the sealing groove of a steel structure civil air defense door provided by an embodiment of the present invention;

[0022] Figure 6 FIG. 29 is a schematic diagram of the internal structure of the fixed box of a steel structure civil air defense door provided by an embodiment of the present invention.

[0023] In the figure: 1, door frame; 2, civil air defense door; 3, sealing mechanism; 300, air pump; 301, gas supply pipe; 302, control button; 303, control valve; 304, air outlet pipe; 305, first sealing strip; 306, fixed frame; 307, movable rod; 308, spring; 309, extrusion plate; 310, first airbag; 4, sealing groove; 5, locking mechanism; 500, mounting block; 501, locking hole; 502, fixed box; 503, air filling pipe; 504, exhaust pipe; 505, one-way valve; 506, locking rod; 507, return spring; 508, movable plate; 509, second airbag; 6, cavity; 7, second sealing strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0025] Example, refer to Figures 1-6 , a steel structure civil air defense door, including a door frame 1 and a civil air defense door 2 provided on the door frame 1. The civil air defense door 2 is rotatably connected to the door frame 1. Four groups of sealing grooves 4 are provided on the inner wall of the door frame 1. Second sealing strips 7 are provided on the inner walls of the four groups of sealing grooves 4. It further includes: a sealing mechanism 3. A cavity 6 is provided inside the civil air defense door 2, and the sealing mechanism 3 is provided inside the cavity 6; a locking mechanism 5: The locking mechanism 5 is provided on the side walls of the door frame 1 and the civil air defense door 2.

[0026] The sealing mechanism 3 includes a fixed frame 306 fixedly provided on the inner wall of the cavity 6. A first airbag 310 is provided inside the fixed frame 306. Four groups of extrusion plates 309 are provided on the side wall of the first airbag 310. The first airbag 310 is made of silicone rubber material, so that the first airbag 310 has the properties of high elasticity, aging resistance, and corrosion resistance. The extrusion plate 309 is made of aluminum alloy material. The extrusion plate 309 is adhered to the outer side wall of the first airbag 310 through glue. An air inlet pipe 301 and an air outlet pipe 304 are provided on the first airbag 310. An air pump 300 is provided on the side wall of the civil air defense door 2. One end of the air inlet pipe 301 is connected to one end of the air pump 300. A control valve 303 is provided on the outer side wall of the air outlet pipe 304. Four groups of first sealing strips 305 that cooperate with the sealing grooves 4 are movably penetrated through the outer side wall of the civil air defense door 2. Two groups of movable rods 307 are provided on the inner side walls of the four groups of first sealing strips 305. One end of the movable rod 307 penetrates through the side wall of the fixed frame 306 and is connected to the side wall of the extrusion plate 309. A spring 308 is sleeved on the outer wall of the movable rod 307. One end of the spring 308 is connected to the inner side wall of the fixed frame 306, and the other end of the spring 308 is connected to the side wall of the extrusion plate 309. A control button 302 is provided on the side wall of the civil air defense door 2.

[0027] It should be noted that when the civil air defense door 2 is closed, the civil air defense door 2 fits against the door frame 1. Then, the staff presses the control button 302, and the control button 302 transmits a signal to the external controller. The external controller receives and processes the signal, and the external controller controls the air pump 300 to work. The air pump 300 can introduce compressed air into the first airbag 310 through the air supply pipe 301. The first airbag 310 expands to squeeze the extrusion plate 309. The extrusion plate 309 squeezes the movable rod 307 and the spring 308. The movable rod 307 drives the first sealing strip 305 to be squeezed into the sealing groove 4 and cooperate with the second sealing strip 7. Thus, the civil air defense door 2 can closely fit against the door frame 1 to form an elastic sealing layer, improving the sealing effect.

[0028] The locking mechanism 5 includes a mounting block 500 provided on the side wall of the door frame 1. A locking hole 501 is opened at the bottom of the mounting block 500. A fixed box 502 is provided on the side wall of the civil air defense door 2. A movable plate 508 is slidably connected in the fixed box 502. Two groups of guiding grooves are opened on the side wall of the fixed box 502. Two groups of guiding blocks matching the guiding grooves are provided on the side wall of the movable plate 508. Under the action of the guiding grooves and the guiding blocks, the movable plate 508 moves more stably up and down in the fixed box 502. A locking rod 506 is provided at the top of the movable plate 508. One end of the locking rod 506 penetrates through the top of the fixed box 502 and is inserted into the locking hole 501. A return spring 507 is sleeved on the outer wall of the locking rod 506. A second airbag 509 is provided in the fixed box 502. The outer side wall of the second airbag 509 is connected to the side wall of the movable plate 508. The second airbag 509 is arranged below the movable plate 508. An air supply pipe 503 and an exhaust pipe 504 are provided on the outer side wall of the second airbag 509. One end of the air supply pipe 503 is communicated with the air supply pipe 301. The exhaust pipe 504 is communicated with the air outlet pipe 304. A one-way valve 505 is provided inside the exhaust pipe 504. The one-way valve 505 is opened, and then the staff rotates the control valve 303, so that the air outlet pipe 304 can be opened. Then, with the cooperation of the exhaust pipe 504, the first airbag 310 and the second airbag 509 can be deflated simultaneously. Thus, the first sealing strip 305 is separated from the sealing groove 4, and the locking rod 506 is separated from the locking hole 501, so that the civil air defense door 2 can be opened.

[0029] It should be noted that when the first airbag 310 is inflated, the compressed air will enter the second airbag 509 through the air supply pipe 503. The second airbag 509 expands to squeeze the movable plate 508. The movable plate 508 squeezes the return spring 507 and the locking rod 506. The locking rod 506 can be inserted into the locking hole 501, which can lock the civil air defense door 2 while sealing the civil air defense door 2 and the door frame 1, can limit the displacement of the civil air defense door 2, avoid sealing failure caused by external force, and improve the sealing effect.

[0030] Working principle of this steel structure civil air defense door: When closing the civil air defense door 2, the civil air defense door 2 fits against the door frame 1. Then, the staff presses the control button 302, and the control button 302 transmits a signal to the external controller. The external controller receives and processes the signal, and the external controller controls the air pump 300 to work. The air pump 300 can introduce compressed air into the first airbag 310 through the air supply pipe 301. The first airbag 310 expands to squeeze the extrusion plate 309. The extrusion plate 309 squeezes the movable rod 307 and the spring 308. The movable rod 307 drives the first sealing strip 305 to be squeezed into the sealing groove 4 and cooperate with the second sealing strip 7. Thus, the civil air defense door 2 can closely fit against the door frame 1 to form an elastic sealing layer, improving the sealing effect. When inflating the first airbag 310, the compressed air will enter the second airbag 509 through the air filling pipe 503. The second airbag 509 expands to squeeze the movable plate 508. The movable plate 508 squeezes the return spring 507 and the locking rod 506. The locking rod 506 can be inserted into the locking hole 501, which can lock the civil air defense door 2 while sealing the civil air defense door 2 and the door frame 1, restricting the displacement of the civil air defense door 2 and avoiding seal failure caused by external forces, improving the sealing effect;

[0031] When it is necessary to open the civil air defense door 2, open the one-way valve 505. Then, the staff rotates the control valve 303, so that the air outlet pipe 304 can be opened. Then, with the cooperation of the exhaust pipe 504, the first airbag 310 and the second airbag 509 can be deflated simultaneously. Thus, the first sealing strip 305 is separated from the sealing groove 4, and the locking rod 506 is separated from the locking hole 501, so that the civil air defense door 2 can be opened.

[0032] It should be noted that the specific model specifications of the control valve and the one-way valve need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0033] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A steel structure civil air defense door, comprising a door frame (1) and a civil air defense door (2) arranged on the door frame (1), wherein the civil air defense door (2) is rotatably connected to the door frame (1), characterized in that: The inner wall of the door frame (1) is provided with four groups of sealing grooves (4), and the inner walls of the four groups of sealing grooves (4) are all provided with second sealing strips (7). The door frame (1) further comprises: a sealing mechanism (3), wherein a cavity (6) is provided inside the civil air defense door (2), and the sealing mechanism (3) is arranged inside the cavity (6); a locking mechanism (5): the locking mechanism (5) is arranged on the side walls of the door frame (1) and the civil air defense door (2).

2. A steel structure civil air defense door according to claim 1, characterized in that: The sealing mechanism (3) comprises a fixing frame (306) fixedly provided on the inner wall of the cavity (6), a first air bag (310) being provided in the fixing frame (306), four groups of extrusion plates (309) being provided on the side wall of the first air bag (310), a gas filling pipe (301) and an air outlet pipe (304) being provided on the first air bag (310), an air pump (300) being provided on the side wall of the civil air defense door (2), one end of the gas filling pipe (301) being connected to one end of the air pump (300), a control valve (303) being provided on the outer wall of the air outlet pipe (304), and the outer wall of the civil air defense door (2) being movable through the outer wall of the civil air defense door (2) Four groups of first sealing strips (305) matched with the sealing grooves (4) are provided, and the inner side walls of the four groups of the first sealing strips (305) are each provided with two groups of movable rods (307), one end of the movable rod (307) passes through the side wall of the fixed frame (306) and is connected to the side wall of the extrusion plate (309), the outer wall of the movable rod (307) is sleeved with a spring (308), one end of the spring (308) is connected to the inner side wall of the fixed frame (306), and the other end of the spring (308) is connected to the side wall of the extrusion plate (309), and the side wall of the civil air defense door (2) is provided with a control button (302).

3. A steel structure civil air defense door according to claim 2, characterized in that: The first airbag (310) is made of silicone rubber material, the extrusion plate (309) is made of aluminum alloy material, and the extrusion plate (309) is adhered to the outer side wall of the first airbag (310) by glue.

4. The steel structure civil air defense door according to claim 1, characterized in that: The locking mechanism (5) comprises a mounting block (500) provided on the side wall of the door frame (1), a locking hole (501) being provided at the bottom of the mounting block (500), a fixing box (502) being provided on the side wall of the civil air defense door (2), a movable plate (508) being slidably connected in the fixing box (502), a locking rod (506) being provided at the top of the movable plate (508), and one end of the locking rod (506) passing through the fixing box (502) The inner top is plugged into the locking hole (501); the outer wall of the locking rod (506) is sleeved with a return spring (507); a second air bag (509) is arranged in the fixing box (502); an inflation pipe (503) and an exhaust pipe (504) are arranged on the outer wall of the second air bag (509); one end of the inflation pipe (503) is connected to the gas filling pipe (301); and the exhaust pipe (504) is connected to the gas outlet pipe (304).

5. A steel structure civil air defense door according to claim 4, characterized in that: A one-way valve (505) is provided inside the exhaust pipe (504).

6. A steel structure civil air defense door according to claim 4, characterized in that: The outer side wall of the second airbag (509) is connected to the side wall of the movable plate (508), and the second airbag (509) is arranged below the movable plate (508).

7. The steel structure civil air defense door according to claim 4, characterized in that: The side wall of the fixed box (502) is provided with two groups of guide grooves, and the side wall of the movable plate (508) is provided with two groups of guide blocks matching the guide grooves.

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