Barrier-free protective airtight door

Abstract

The utility model discloses a barrier-free protective air-tight door which comprises a door frame assembly fixedly installed on a door opening of a building structure, hinge assemblies installed on the two sides of the door frame assembly, two door leaf assemblies installed on the hinge assemblies and a center joint sealing piece arranged between the two door leaf assemblies. The two door leaf assemblies are sealed through the center joint sealing piece. A locking assembly is installed on the door leaf assembly, and the door leaf assembly and the door frame assembly are locked and closed through the locking assembly; a pressing sealing piece is arranged at the bottom of the locking assembly and installed at the bottom of the door frame assembly in an extruded mode. The protective air-tight door adopts a modular design on the whole, is suitable for intelligent manufacturing, is convenient to install and construct, further has relatively high air-tight capability, and is worthy of popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of airtight doors for civil defense engineering, and specifically to an unobstructed protective airtight door. Background Technology

[0002] Protective airtight doors are special doors used in protective engineering projects. They can block both shock waves and toxic agents, combining the dual functions of a protective door and an airtight door. In the event of external threats such as air raids or explosions, they effectively protect personnel, equipment, and materials from shock wave overpressure, radioactive contamination, and chemical agents, ensuring the safety and airtightness of the internal space of the protective engineering project. Protective airtight doors mainly consist of door leaves, door frames, and sealing devices. When an external explosion or other event generates a shock wave, the door leaves rely on their structural strength and stable connection with the door frame to withstand the pressure of the shock wave, distributing the pressure to the door frame and surrounding wall structure, preventing the shock wave from directly penetrating the interior of the protective engineering project. Simultaneously, when closed, the sealing device functions, forming a tight barrier to prevent toxic agents and other harmful substances from entering through the door gaps. Currently, the main beams of the door leaves are typically made of welded steel plates. This method is not suitable for modern intelligent assembly line manufacturing processes, as the manufacturing process is cumbersome and the overall cost is high. Utility Model Content

[0003] The purpose of this utility model is to provide a barrier-free protective airtight door. The protective airtight door adopts a modular design, is suitable for intelligent manufacturing, is easy to install and construct, and has a strong sealing capability, making it worthy of promotion and application.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An accessible and airtight door includes a door frame assembly fixedly installed on a doorway in a building structure, hinge assemblies installed on both sides of the door frame assembly, two door leaf assemblies installed on the hinge assemblies, and a center seam seal disposed between the two door leaf assemblies. When the two door leaf assemblies are closed, the center seam seal seals the two door leaf assemblies. A locking assembly is installed on the door leaf assembly, which locks the door leaf assembly to the door frame assembly. A pressure seal is provided at the bottom of the locking assembly, and the pressure seal is pressed and installed at the bottom of the door frame assembly.

[0006] Preferably, the door frame assembly includes a horizontally positioned lower sill and an inverted U-shaped door frame fixedly positioned at the top of the lower sill.

[0007] Preferably, a double sealing strip is provided on the inverted U-shaped door frame, which seals the connection between the inverted U-shaped door frame and the door leaf assembly.

[0008] Preferably, hinge supports are provided on both sides of the inverted U-shaped door frame, and the hinge assembly is installed on the hinge supports.

[0009] Preferably, a locking box is fixedly installed on the top of the door frame assembly, and a locking hole is provided at the bottom of the door frame assembly. The upper end of the locking component is inserted into the locking box, and the lower end of the locking component is inserted into the locking hole.

[0010] Preferably, the locking assembly includes a first commutator fixedly mounted on the door panel assembly, a handwheel powered to the front and rear sides of the first commutator, a second commutator powered to the left and right sides of the first commutator via a coupling, a drive rod powered to the upper and lower sides of the second commutator via a coupling, and a locking head fixedly connected to the end of the drive rod. The locking head can extend and be inserted into the locking hole or the locking box.

[0011] Preferably, the locking head includes a support base fixedly installed on the pressing seal and the door assembly, a lead screw rotatably installed in the support base, and a lead screw nut slider connected to the lead screw. The lead screw is fixedly connected to the drive rod, and the lead screw nut slider is slidably installed in the support base. When the drive rod drives the lead screw to rotate, the lead screw nut slider slides out or retracts along the support base.

[0012] Preferably, the pressure seal includes an L-shaped bracket and a lower seal fixedly mounted on the L-shaped bracket.

[0013] Preferably, the door assembly includes multiple horizontal beams arranged in parallel at intervals, multiple vertical beams arranged between two adjacent horizontal beams, and a panel wrapped around the outside of the horizontal and vertical beams.

[0014] Preferably, the crossbeam and the longitudinal beam have the same structure, both consisting of a C-shaped main beam and H-shaped steel embedded in the C-shaped main beam.

[0015] In this utility model, the door leaf adopts a hinged design. The door frame, door leaf panel, and main beam structure based on rolling and bending processes are more suitable for intelligent assembly line manufacturing than traditional steel plate welded civil defense doors. This improves the convenience of manufacturing and structural stability, reduces manufacturing costs, and has significant advantages in modularity, convenience, intelligent manufacturing and rapid assembly, and process optimization. It meets the needs of modern civil defense and is an efficient, reliable, and practical protective structure.

[0016] The lower threshold adopts a threshold-free and unobstructed design (i.e., it does not protrude outwards). The rotating handwheel, in conjunction with the bevel gear reversing mechanism, can generate greater torque, ensuring strong structural stability when the door is closed. The center seam seal, the lower pressure seal, and the double sealing strips on the door frame ensure the airtight performance of the protective airtight door. Attached Figure Description

[0017] Figure 1 This is an axonometric view of the overall structure of this utility model;

[0018] Figure 2 This is a front view schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a left-side view of the overall structure of this utility model;

[0020] Figure 4 This is a front view schematic diagram of the door frame assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the AA cross-section of this utility model;

[0022] Figure 6 This is a schematic diagram of the BB cross-section of this utility model;

[0023] Figure 7 This is a schematic diagram of the DD cross-section of this utility model;

[0024] Figure 8 This is a partially enlarged schematic diagram of the present invention (III).

[0025] Figure 9 This is a partially enlarged schematic diagram of the inverted U-shaped door frame of this utility model;

[0026] Figure 10 This is a top view of the door panel assembly of this utility model;

[0027] Figure 11 This is a schematic diagram of the cross-section of the EE of this utility model;

[0028] Figure 12 This is a schematic diagram of the FF cross-section of this utility model;

[0029] Figure 13 This is a partially enlarged schematic diagram of the sealing state of the central seam of this utility model;

[0030] Figure 14 This is a schematic diagram of the hinge assembly structure of this utility model;

[0031] Figure 15 This is an isometric view of the locking assembly structure of this utility model;

[0032] Figure 16 This is a schematic diagram of the locking head structure of this utility model;

[0033] In the diagram: 1. Door frame assembly; 2. Hinge assembly; 3. Door leaf assembly; 4. Center seam seal; 5. Hinge support; 6. Locking assembly; 7. Lower seal; 8. Locking box; 9. Locking hole; 10. Lower sill; 11. Inverted U-shaped door frame; 12. Door frame double sealing strip; 30. Horizontal beam; 31. Longitudinal beam; 32. Panel; 60. First reversing device; 61. Handwheel; 62. Second reversing device; 63. Drive rod; 64. Locking head; 70. L-shaped bracket; 71. Lower seal; 640. Support base; 641. Lead screw; 642. Lead screw nut slider. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings:

[0035] like Figures 1 to 16 The barrier-free protective airtight door shown includes a door frame assembly 1 fixedly installed on a doorway in a building structure, hinge assemblies 2 fixedly installed on both sides of the door frame assembly 1, two door leaf assemblies 3 fixedly installed on the hinge assemblies 2, and a center seam seal 4 disposed between the two door leaf assemblies 3. When the two door leaf assemblies 3 are closed, the center seam seal 4 seals the joint between the two door leaf assemblies 3. The hinge assembly 2 is a commercially available product, and its structure is not described in detail in this specification.

[0036] The door frame assembly 1 includes a horizontally positioned lower sill 10 and an inverted U-shaped door frame 11 fixedly positioned at the top of the lower sill 10. A double sealing strip 12 is provided on the inverted U-shaped door frame 11, which seals the connection between the inverted U-shaped door frame 11 and the door leaf assembly 3, ensuring strong airtightness when the door leaf assembly 3 is closed. Specifically, the inverted U-shaped door frame 11 is an irregularly shaped structure manufactured using rolling and bending processes. Two grooves are integrally bent on the inverted U-shaped door frame 11, and the double sealing strip 12 is disposed within these two grooves.

[0037] Hinge supports 5 are provided on both sides of the inverted U-shaped door frame 11, and hinge assemblies 2 are installed on the hinge supports 5. Specifically, two hinge supports 5 are provided on each side of the inverted U-shaped door frame 11 to ensure the structural stability of the door leaf assembly 3. The door leaf assembly 3 includes multiple horizontal beams 30 arranged in parallel and spaced apart, multiple longitudinal beams 31 fixedly arranged between two adjacent horizontal beams 30, and a panel 32 wrapped around the outside of the horizontal beams 30 and longitudinal beams 31. The horizontal beams 30 and longitudinal beams 31 have the same structure, both consisting of a C-shaped main beam and H-shaped steel embedded in the C-shaped main beam. The C-shaped main beam has an inward folded edge. When the H-shaped steel is installed in the C-shaped main beam, the outer end face of the H-shaped steel is flush with the outer side of the C-shaped main beam. The C-shaped main beam and the panel 32 are manufactured using a bending process. The cold bending deformation process and the minimum bending radius are investigated in combination with the assembly line process to determine the bending shape of the front and rear panels and the C-shaped main beam. The combination of the C-shaped main beam and the H-shaped steel improves its impact resistance.

[0038] A locking component 6 is installed on the door leaf assembly 3, which locks the door leaf assembly 3 and the door frame assembly 1 tightly closed. A locking box 8 is fixedly installed on the top of the door frame assembly 1, and a locking hole 9 is provided at the bottom of the door frame assembly 1. The upper end of the locking component 6 can extend and insert into the locking box 8, and the lower end of the locking component 6 can be inserted into the locking hole 9, thereby achieving locking after the door leaf assembly 3 and the door frame assembly 1 are closed.

[0039] The locking assembly 6 includes a first commutator 60 fixedly mounted on the door assembly 3, a handwheel 61 powered to the front and rear sides of the first commutator 60, a second commutator 62 powered to the left and right sides of the first commutator via a coupling, a drive rod 63 powered to the upper and lower sides of the second commutator 62 via a coupling, and a locking head 64 fixedly connected to the end of the drive rod 63. The locking head 64 can extend and be inserted into the locking hole 9 or the locking box 8.

[0040] The locking head 64 includes multiple support seats 640 fixedly installed on the pressure seal 7 and the door panel assembly, a lead screw 641 rotatably installed in the corresponding support seat 640, and a nut slider 642 connected to the lead screw 641. The lead screw 641 is fixedly connected to the drive rod 63. The nut slider 642 is slidably installed in the corresponding support seat 640 by a key. When the drive rod 63 drives the lead screw 641 to rotate, the nut slider 642 slides out or retracts along the support seat 640. When it slides out, it is inserted into the corresponding locking hole 9 or locking box 8 to achieve locking closure.

[0041] A pressing seal 7 is provided at the bottom of the locking assembly 6, and the pressing seal 7 is pressed and installed at the bottom of the door frame assembly 1. The pressing seal 7 includes an L-shaped bracket 70 and a lower seal 71 fixedly installed on the bottom of the L-shaped bracket 70. When the locking assembly 6 is in the locked state, the lower seal 71 in the pressing seal 7 is pressed against the top of the lower sill 10 by the locking head 64, achieving a bottom seal, thereby making the door frame assembly 1 and the door leaf assembly 3 completely sealed when closed. The L-shaped bracket 70 is fixedly connected to the bottom nut slider 642. When the nut slider 642 extends outward, it drives the L-shaped bracket 70 to move downward, causing the lower seal 71 to press and install on the top of the lower sill 10. When the nut slider 642 retracts inward, it drives the L-shaped bracket 70 to move upward, causing the lower seal 71 to separate from the lower sill 10.

[0042] The door panel assembly 3 is also equipped with a handle for operation, and a lifting lug can be detachably installed on the top of the door panel assembly 3 to facilitate its overall hoisting and transportation.

[0043] The above embodiments are merely illustrative of the concept and implementation of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical solutions without substantial changes are still within the scope of protection.

Claims

1. A barrier-free protective airtight door, characterized in that: The system includes a door frame assembly (1) fixedly installed on the door opening of the building structure, hinge assemblies (2) installed on both sides of the door frame assembly (1), two door leaf assemblies (3) installed on the hinge assemblies (2), and a center seam seal (4) disposed between the two door leaf assemblies (3). When the two door leaf assemblies (3) are closed, the center seam seal (4) seals the two door leaf assemblies (3). A locking assembly (6) is installed on the door leaf assembly (3), which locks the door leaf assembly (3) and the door frame assembly (1) together. A pressure seal (7) is provided at the bottom of the locking assembly (6), which is pressed and installed at the bottom of the door frame assembly (1).

2. The barrier-free protective airtight door according to claim 1, characterized in that: The door frame assembly (1) includes a horizontally set lower threshold (10) and an inverted U-shaped door frame (11) fixedly set on top of the lower threshold (10).

3. The barrier-free protective airtight door according to claim 2, characterized in that: A double sealing strip (12) is provided on the inverted U-shaped door frame (11), and the double sealing strip (12) seals the connection between the inverted U-shaped door frame (11) and the door leaf assembly (3).

4. The barrier-free protective airtight door according to claim 2 or 3, characterized in that: Hinge supports (5) are provided on both sides of the inverted U-shaped door frame (11), and the hinge assembly (2) is installed on the hinge support (5).

5. The barrier-free protective airtight door according to claim 1, characterized in that: A locking box (8) is fixedly installed on the top of the door frame assembly (1), and a locking hole (9) is provided at the bottom of the door frame assembly (1). The upper end of the locking component (6) is inserted into the locking box (8), and the lower end of the locking component (6) is inserted into the locking hole (9).

6. The barrier-free protective airtight door according to claim 5, characterized in that: The locking assembly (6) includes a first commutator (60) fixedly mounted on the door assembly (3), a handwheel (61) powered to the front and rear sides of the first commutator (60), a second commutator (62) powered to the left and right sides of the first commutator (60) via a coupling, a drive rod (63) powered to the upper and lower sides of the second commutator (62) via a coupling, and a locking head (64) fixedly connected to the end of the drive rod (63). The locking head (64) can extend and be inserted into the locking hole (9) or the locking box (8).

7. The barrier-free protective airtight door according to claim 6, characterized in that: The locking head (64) includes a support base (640) fixedly installed on the pressing seal (7) and the door panel assembly (3), a lead screw (641) rotatably installed in the support base (640), and a lead screw nut slider (642) connected to the lead screw (641). The lead screw (641) is fixedly connected to the drive rod (63), and the lead screw nut slider (642) is slidably installed in the support base (640). When the drive rod (63) drives the lead screw (641) to rotate, the lead screw nut slider (642) slides out or retracts along the support base (640).

8. The barrier-free protective airtight door according to claim 1, characterized in that: The pressure seal (7) includes an L-shaped bracket (70) and a lower seal (71) fixedly mounted on the L-shaped bracket (70).

9. The barrier-free protective airtight door according to claim 1, characterized in that: The door assembly (3) includes multiple horizontal beams (30) arranged in parallel, multiple vertical beams (31) arranged between two adjacent horizontal beams (30), and a panel (32) wrapped around the outside of the horizontal beams (30) and the vertical beams (31).

10. The barrier-free protective airtight door according to claim 9, characterized in that: The crossbeam (30) and the longitudinal beam (31) have the same structure, both consisting of a C-shaped main beam and H-shaped steel embedded in the C-shaped main beam.

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