Combined lower supporting leg type civil air defense door frame

Abstract

A combined lower supporting leg type civil air defense door frame comprises a pouring pit formed in the surface of a concrete foundation at a civil air defense door, the civil air defense door frame is installed between steel bar systems, a triangular seat plate is arranged at the bottom of the outer side face of the civil air defense door frame in the width direction of the civil air defense door frame, and two right-triangle-shaped limiting seats are symmetrically arranged at the two ends of the triangular seat plate; an L-shaped check block is arranged on the civil air defense door frame above the limiting seat, a pressing plate is arranged between the L-shaped check block and the inclined plane of the limiting seat, a through hole is formed in the middle of the pressing plate, a bolt is installed in the through hole, a threaded hole is correspondingly formed in the surface of the civil air defense door frame, and the inner end of the bolt is connected into the threaded hole; the triangular base plate in the civil air defense door frame is detachably fixed to the bottom of the civil air defense door frame through the bolts, the pressing plates, the L-shaped check blocks and other assemblies, the triangular base plate serves as a cushion block to protect the bottom of the civil air defense door frame during normal use, the impact force borne by the triangular base plate is borne, and the triangular base plate can be detached to close a civil air defense door in emergency; and the sealing effect and the supporting strength after the civil defense door is closed are ensured.

Description

Technical Field

[0001] This utility model relates to the field of civil defense engineering in buildings, and in particular to a combined bottom support type civil defense door frame. Background Technology

[0002] Civil defense door frames typically refer to the door frames used in air-raid shelters or civil defense projects. They are usually used together with protective doors. When closed, the protective doors can seal the door frames to ensure that in wartime or emergency situations, they can effectively block the intrusion of harmful factors such as shock waves and toxic agents, thus protecting the safety of personnel and equipment.

[0003] Currently, some residential communities and shopping malls have underground parking garages equipped with civil defense facilities. These facilities can be used as parking lots and storage rooms during peacetime, but can be quickly converted into refuge areas in wartime or emergencies to provide safety for residents. The frames of these civil defense doors protrude above the ground to ensure a tight seal when closed. However, during normal use, passing vehicles can impact these protruding frames. In an emergency, closing the doors can weaken the seal and reduce the structural strength of the door and frame, compromising the safety of personnel and equipment. This needs improvement. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a combined bottom-supported type civil defense door frame.

[0005] The technical solution of this utility model is: a combined bottom-supported type air-raid shelter door frame, including a square trench casting pit set on the concrete foundation surface at the air-raid shelter door, with a steel reinforcement system at both ends of the casting pit, and the air-raid shelter door frame installed between the steel reinforcement system. A triangular seat plate is provided on the bottom of the outer side of the air-raid shelter door frame along its width direction. The bottom surface of the triangular seat plate is perpendicular to the surface of the air-raid shelter door frame. Two right-angled triangular limit seats are symmetrically provided at both ends of the triangular seat plate. The limit seats are integrally formed with the triangular seat plate. An L-shaped block is provided on the air-raid shelter door frame above the limit seats. A pressure plate is provided between the inclined surface of the L-shaped block and the limit seats. The pressure plate is inclinedly supported between the L-shaped block and the limit seats. A through hole is provided in the middle of the pressure plate. A bolt is installed in the through hole. A threaded hole is provided on the surface of the air-raid shelter door frame. The inner end of the bolt is connected to the threaded hole. The hexagonal end of the bolt is supported on the outer surface of the pressure plate.

[0006] Preferably, the surface of the air-raid shelter door frame is provided with a circular reinforcing boss, which is fixedly connected to the air-raid shelter door frame as a whole, and a threaded hole is provided in the reinforcing boss.

[0007] Preferably, the outer side of the pressure plate is provided with a circular protrusion, and an angle α is provided between the end face of the protrusion and the surface of the pressure plate.

[0008] Preferably, L-shaped support plates are fixed to the surface of the air-raid shelter door frame at both ends of the triangular base plate, and the bottom surface of the triangular base plate is attached to the surface of the L-shaped support plate.

[0009] Preferably, the upper and lower parts of one side of the air-raid shelter door frame are provided with an extension plate, and an inner plate is fixedly connected to the inner side of the extension plate. The size of the inner plate is larger than that of the extension plate.

[0010] Preferably, the inner plate has four pins at its four corners, and the outer plate has corresponding socket holes at its corresponding positions. The pins are inserted into the socket holes, and a groove is provided in the middle of the outer plate.

[0011] Preferably, a trapezoidal auxiliary plate flush with the lower surface of the triangular base plate is fixedly connected to the surface of the lower extension plate. The inner end of the trapezoidal auxiliary plate is provided with a right-angled folded edge, which is welded and fixed to the surface of the lower extension plate.

[0012] Preferably, the bottom surface of the air-raid shelter door frame is provided with a lower sealing groove, and a U-shaped sealing groove is formed between the top and the sides by setting an inner U-shaped rib and an outer U-shaped rib, and the two ends of the U-shaped sealing groove are respectively connected to the two ends of the lower sealing groove.

[0013] The beneficial technical effects of this utility model are as follows: the triangular base plate in the air-raid shelter door frame is detachably fixed to the bottom of the air-raid shelter door frame by bolts, pressure plate, L-shaped stop block and other components. In normal use, the triangular base plate acts as a pad to protect the bottom of the air-raid shelter door frame and bear the impact force it receives. In case of emergency, it can be removed to close the air-raid shelter door, ensuring the airtightness and support strength of the air-raid shelter door after it is closed. It is highly flexible in use and suitable for widespread promotion in the market. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention in its installed state;

[0015] Figure 2 This is a three-dimensional structural diagram of the civil defense door frame;

[0016] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0017] Figure 4 This is a schematic diagram of the main structure of the civil defense door frame;

[0018] Figure 5 yes Figure 4 A schematic diagram of the AA-direction cross-section structure;

[0019] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0020] Figure 7This is a schematic diagram of the three-dimensional structure of the triangular base plate.

[0021] In the diagram, 11. Concrete foundation, 111. Pouring pit, 12. Reinforcing steel system, 13. Civil defense door frame, 131. Threaded hole, 132. Reinforcing boss, 133. Outer extension plate, 14. Triangular seat plate, 141. Limiting seat, 15. L-shaped stop block, 16. Bolt, 17. Pressure plate, 171. Protruding seat, 18. L-shaped support plate, 19. Inner plate, 191. Pin, 20. Trapezoidal auxiliary plate, 21. Lower sealing groove, 221. Inner U-shaped protrusion, 222. Outer U-shaped protrusion, 223. U-shaped sealing groove. Detailed Implementation

[0022] Example 1, see appendix Figure 1-7 A combined bottom-supported type air-raid shelter door frame 13 includes a pouring pit 111 set on the surface of the concrete foundation 11 at the air-raid shelter door, with a steel reinforcement system 12 at both ends of the pouring pit. The air-raid shelter door frame 13 is installed between the steel reinforcement system 12. A triangular base plate 14 is provided on the bottom of the outer side of the air-raid shelter door frame 13 along its width direction. The position of the triangular base plate corresponds to the position of the pouring pit 111. After concrete is poured into the pouring pit 111, a floor plane is formed. The triangular base plate 14 is supported on the floor plane. Two right-angled triangular limiting seats 141 are symmetrically provided at both ends of the triangular base plate. An L-shaped stop 15 is provided on the air defense door frame 13 above the seat. A pressure plate 17 is provided between the L-shaped stop and the inclined surface of the limiting seat 141. A through hole is provided in the middle of the pressure plate 17, and a bolt 16 is installed in the through hole. A threaded hole 131 is provided on the surface of the air defense door frame 13. The inner end of the bolt 16 is connected to the threaded hole 131. Tightening the bolt 16 can push the pressure plate 17 inward. Under the blocking action of the upper L-shaped stop 15, the pressure plate 17 can be pressed tightly against the inclined side of the limiting seat 141 to fix the triangular seat plate 14. Loosening the bolt 16 can easily remove the triangular seat plate 14.

[0023] The bottom surface of the air defense door frame 13 is provided with a lower sealing groove 21. A U-shaped sealing groove 223 is formed between the top and the sides by setting an inner U-shaped rib 221 and an outer U-shaped rib 222. The lower sealing groove 21 and the U-shaped sealing groove 223 are used to install sealing strips to ensure the airtightness between the air defense door and the door frame after the air defense door is closed.

[0024] In this embodiment, during normal use, the triangular base plate 14 acts as a pad to protect the bottom of the civil defense door frame 13. When a vehicle passes by, it can cross the door frame along the triangular base plate and bear the impact force on the door frame. In case of emergency, the triangular base plate 14 can be quickly removed to close the civil defense door, ensuring the airtightness and support strength of the civil defense door after it is closed.

[0025] Example 2, see appendix Figure 4-6This embodiment is basically the same as Embodiment 1, except that: the surface of the air defense door frame 13 is provided with a reinforcing boss 132, and a threaded hole 131 is provided in the reinforcing boss 132. The reinforcing boss is used to improve the connection strength of the bolt 16 in the threaded hole 131, thereby improving the tightening and fixing strength of the triangular seat plate 14. A protruding seat 171 is provided on the outer side of the pressure plate 17. An included angle α is provided between the end face of the protruding seat and the surface of the pressure plate. This included angle makes the protruding seat 171 vertical when the pressure plate 17 is in the installation state, so that the hexagonal head of the bolt 16 fits against the vertical surface of the protruding seat 171, providing stable support for the bolt, and the bolt 16 is not easy to loosen.

[0026] Meanwhile, L-shaped support plates 18 are fixed on the surface of the air-raid shelter door frame 13 at both ends of the triangular seat plate 14. The bottom surface of the triangular seat plate 14 is attached to the surface of the L-shaped support plate 18. The two L-shaped support plates 18 support the triangular seat plate from the bottom. Combined with the locking and fixing of the pressure plate 17 and the bolt 16, the impact resistance of the triangular seat plate 14 can be effectively guaranteed.

[0027] Example 3, see appendix Figure 2-3 This embodiment is basically the same as Embodiment 1, except that: an extension plate 133 is provided on the upper and lower parts of one side of the civil defense door frame 13. The extension plate increases the contact area between the door frame and the steel reinforcement system 12, thereby increasing the contact area between the door frame and the wall after the concrete is poured. An inlay plate 19 is fixedly connected to the inner side of the extension plate 133. The inlay plate 19 can be anchored into the wall after the concrete is poured. Combined with the extension plate 133, the stability of the door frame installation can be greatly improved. Four pins 191 are provided at the four corners of the inlay plate 19. The corresponding positions of the extension plate 133 are provided with socket holes. The pins 191 are matched and inserted into the socket holes. The inlay plate is attached and fixed to the inner side of the extension plate through the pins and socket holes.

[0028] A trapezoidal auxiliary plate 20, which is flush with the lower surface of the triangular base plate 14, is fixedly connected to the surface of the lower extension plate 133. The trapezoidal auxiliary plate 20 is used to provide horizontal support on the surface of the concrete foundation 11 and to play a role in vertical limiting, thereby improving the installation strength of the civil defense door frame 13.

Claims

1. A combined under-support type air-raid shelter door frame, comprising a pouring pit set on the concrete foundation surface at the air-raid shelter door, with a steel reinforcement system at both ends of the pouring pit, and the air-raid shelter door frame installed between the steel reinforcement systems, characterized in that: The outer side bottom of the air-raid shelter door frame is provided with a triangular base plate along its width direction. Two right-angled triangular limit seats are symmetrically provided at both ends of the triangular base plate. An L-shaped block is provided on the air-raid shelter door frame above the limit seats. A pressure plate is provided between the inclined surface of the L-shaped block and the limit seat. A through hole is provided in the middle of the pressure plate. A bolt is installed in the through hole. A threaded hole is provided on the surface of the air-raid shelter door frame, and the inner end of the bolt is connected to the threaded hole.

2. The combined under-support type civil defense door frame according to claim 1, characterized in that: The surface of the air-raid shelter door frame is provided with a reinforcing boss, and a threaded hole is located in the reinforcing boss.

3. A combined under-support type civil defense door frame according to claim 2, characterized in that: The outer side of the pressure plate is provided with a protrusion, and there is an included angle α between the end face of the protrusion and the surface of the pressure plate.

4. A combined under-support type civil defense door frame according to claim 1, characterized in that: Both ends of the triangular base plate are fixed with L-shaped support plates on the surface of the air-raid shelter door frame, and the bottom surface of the triangular base plate is attached to the surface of the L-shaped support plate.

5. A combined under-support type civil defense door frame according to claim 1, characterized in that: The upper and lower parts of one side of the air-raid shelter door frame are provided with an extension plate, and an inner plate is fixedly connected to the inner side of the extension plate.

6. A combined under-support type civil defense door frame according to claim 5, characterized in that: The inner plate has four pins at its four corners, and the outer plate has corresponding socket holes at the corresponding positions, with the pins being inserted into the socket holes.

7. A combined under-support type civil defense door frame according to claim 5, characterized in that: A trapezoidal auxiliary plate, flush with the lower surface of the triangular base plate, is fixedly connected to the surface of the lower extension plate.

8. A combined under-support type civil defense door frame according to claim 1, characterized in that: The bottom surface of the air defense door frame is provided with a lower sealing groove, and a U-shaped sealing groove is formed between the top and the sides by setting an inner U-shaped rib and an outer U-shaped rib.

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