Concrete underground security door

Abstract

The application relates to the technical field of civil air defense engineering instruments and equipment, in particular to a concrete underground protective door which comprises a door body, a door frame, a locking assembly and a sealing assembly, the door body is connected with the door frame through a hinge, the door body comprises a metal frame and a concrete structure, the concrete structure is filled in the metal frame, a fiber composite material is arranged in the concrete structure, the fiber composite material is arranged in double layers and in two directions, and a manual rotating disc capable of simultaneously opening or closing the locking assembly and the sealing assembly is rotationally connected to the concrete structure. The fiber composite material arranged in the concrete structure can improve the tensile, compressive and shearing performances of the concrete, thereby increasing the impact resistance of the concrete, so that the application has the effect of improving the impact resistance of the protective door.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil air defense engineering equipment, in particular to a concrete underground protective door. BACKGROUND

[0002] The protective door is the door of the entrance and exit of the civil air defense engineering, and is the last safety guarantee of the civil air defense engineering. The protective door is classified as ordinary single and double-leaf protective airtight door and airtight door, movable threshold single and double-leaf protective airtight door and airtight door and many other civil air defense equipment.

[0003] Under the condition of modern war, higher requirements are put forward for the impact resistance of the protective door. SUMMARY

[0004] In order to improve the impact resistance of the protective door, the present application provides a concrete underground protective door.

[0005] The concrete underground protective door provided by the present application adopts the following technical scheme:

[0006] A concrete underground protective door comprises a door body, a door frame, a locking assembly and a sealing assembly, the door body is connected with the door frame through a hinge, the door body comprises a metal frame and a concrete structure, the concrete structure is filled in the metal frame, and a fiber composite material is arranged in the concrete structure, the fiber composite material is arranged in double layers and in two directions; a manual rotary disc capable of simultaneously opening or closing the locking assembly and the sealing assembly is rotatably connected to the concrete structure.

[0007] By arranging the fiber composite material in the concrete structure, the tensile, compressive and shear properties of the concrete structure can be improved, so as to increase the impact resistance of the concrete structure, and the manual rotary disc can simultaneously open or close the locking assembly and the sealing assembly, thereby improving the operation efficiency.

[0008] Optionally, the intersection parts of the fiber composite material are provided with connecting pieces, the connecting piece comprises a connecting rod and two connecting plates, the two connecting plates are fixedly arranged at the two ends of the connecting rod, and a plurality of clamping blocks for clamping the fiber composite material are arranged on the surfaces of the two connecting plates away from the connecting rod.

[0009] By adopting the above technical scheme, the connecting piece can support and connect the fiber composite material arranged in double layers and in two directions, and the clamping blocks arranged on the connecting plates facilitate the placement and fixation of the fiber composite material, thereby improving the operation efficiency.

[0010] Optionally, a plurality of convex ribs and grooves are formed on the rod body of the connecting rod in the axial direction.

[0011] By adopting the technical scheme, the convex ridges and the concave grooves are arranged on the rod body of the connecting rod in the axial direction, so that the contact area between the connecting rod and the concrete structure is increased, and the connecting strength between the connecting rod and the concrete structure is increased.

[0012] Optionally, the connecting rods are fixedly provided with positioning strips, the positioning strips are arranged in double layers and in two directions, and two ends of the positioning strips are fixedly connected with the inner wall of the metal frame.

[0013] By adopting the technical scheme, the positioning strips arranged between the connecting rods can play the role of positioning and fixing, so that the connecting rods and the fiber composite material are not prone to moving in the process of pouring the concrete structure, and the two ends of the positioning strips are fixedly connected with the inner wall of the metal frame, so that the connecting strength between the concrete structure and the metal frame is improved.

[0014] Optionally, the locking assembly comprises a lock cylinder, a transmission gear, and a first transmission rod, the lock cylinder comprises a locking block and a limiting block, the transmission gear comprises an inner gear, an outer gear and a transmission shaft, the inner gear and the outer gear are fixedly arranged at two ends of the transmission shaft, the rod body of the first transmission rod is provided with teeth, and the manual rotary disc is fixedly connected with a toothed disc; the locking block and the limiting block are fixedly connected, a fixed rod with teeth is fixedly connected to the limiting block, the fixed rod is engaged with the inner gear, the outer gear is engaged with one end of the first transmission rod, and the other end of the first transmission rod is engaged with the toothed disc.

[0015] By adopting the technical scheme, rotating the manual rotary disc drives the first transmission rod to move, the first transmission rod moving drives the outer gear to rotate, the outer gear is driven to rotate by the transmission shaft, so that the fixed rod moves, the fixed rod drives the lock cylinder to move, and the lock cylinder is in the locked or unlocked state.

[0016] Optionally, the concrete structure is provided with a pre-embedded box, the lock cylinder and the transmission gear are integrated in the pre-embedded box, and the outer gear protrudes from the pre-embedded box and the concrete structure and is engaged with the first transmission rod.

[0017] By adopting the technical scheme, the lock cylinder and the transmission gear are integrated in the pre-embedded box, and the pre-embedded box is installed in the concrete structure by pouring concrete, so that the pre-embedded box can isolate the internal and external concrete structures and reduce interference.

[0018] Optionally, the pre-embedded box is embedded between the fiber composite materials, the outer side surface of the pre-embedded box is fixedly connected with the inner wall of the metal frame, the lock cylinder passes through the pre-embedded box and the metal frame and abuts against the door frame, and the side wall of the door frame is provided with a lock hole for abutting against the lock cylinder.

[0019] By adopting the technical scheme, the embedded box is arranged between the double-layer and double-direction arranged fiber composite materials, no interference is caused to the fiber composite materials, the side wall of the door frame is provided with a lock hole for abutting against the lock core, and the lock core is conveniently locked.

[0020] Optionally, the sealing assembly comprises a first sealing block, a second sealing block and a second transmission rod, the first sealing block is fixedly connected with the first end of the first transmission rod away from the toothed disc, the second sealing block is fixedly connected with a push rod, the push rod is rotationally connected with the second transmission rod, the second transmission rod is rotationally connected with the first transmission rod, and the door frame is provided with a sealing groove for abutting against the first sealing block and the second sealing block.

[0021] By adopting the technical scheme, the first sealing block is fixedly connected with the first transmission rod, the second sealing block is rotationally connected with the second transmission rod through the fixedly connected push rod, and the second transmission rod is rotationally connected with the first transmission rod, so that the first sealing block and the second sealing block are slidably inserted into the sealing groove while the lock core is locked by rotating the manual rotary disc, and the operation efficiency is improved.

[0022] Optionally, both ends of the first sealing block are provided with first sliding blocks, the first sliding blocks are slidably inserted into the first sealing block, and the first sliding blocks and the first sealing block are connected through springs; both ends of the second sealing block are provided with second sliding blocks, the second sliding blocks are slidably inserted into the second sealing block, and the second sliding blocks and the second sealing block are connected through springs, and the first sliding blocks abut against the second sliding blocks.

[0023] By adopting the technical scheme, in the process that the first sealing block and the second sealing block move to the sealing groove, the first sliding blocks and the second sliding blocks are kept abutting against each other under the action of the springs, and the sealing gaskets in the sealing groove are cooperated, so that the air tightness of the protective door is improved.

[0024] Optionally, the outer side surface of the metal frame is provided with a sliding groove, the first sealing block and the second sealing block can slide in the sliding groove, the first transmission rod passes through the sliding groove and is fixedly connected with the first sealing block, and the push rod passes through the sliding groove and is fixedly connected with the second sealing block.

[0025] By adopting the technical scheme, on the one hand, the movement of the first sealing block and the second sealing block is limited by the sliding groove, and on the other hand, the sliding groove is used in cooperation with the sealing groove, so that the air tightness of the protective door is improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The concrete structure is provided with a fiber composite material, which can improve the tensile, compressive and shear performance of the concrete, thereby increasing the impact resistance of the concrete, and the manual turntable can simultaneously open or close the locking assembly and the sealing assembly, improving the operation efficiency.

[0028] 2. The connecting piece can support and connect the fiber composite materials arranged in a double-layer and double-direction manner, and the connecting plate is provided with a clamping block to facilitate the placement and fixation of the fiber composite materials.

[0029] 3. The convex ribs and grooves formed on the connecting rod in the axial direction can increase the contact area of the connecting rod with the concrete structure, thereby increasing the connection strength between the connecting rod and the concrete structure and improving the overall strength.

[0030] 4. The positioning strips arranged between the connecting rods can function as positioning and fixation, so that the connecting rods and the fiber composite materials are not prone to moving during the pouring of the concrete structure.

[0031] 5. The first sealing block is fixedly connected with the first transmission rod, the second sealing block is fixedly connected with the push rod, the push rod is rotatably connected with the second transmission rod, and the second transmission rod is rotatably connected with the first transmission rod, so that the first sealing block and the second sealing block can be slidably inserted into the sealing groove when the lock cylinder is locked by rotating the manual turntable, thereby improving the operation efficiency.

[0032] 6. During the movement of the first sealing block and the second sealing block to the sealing groove, the first sliding block and the second sliding block are kept in close contact under the action of the spring, and cooperate with the sealing gasket in the sealing groove, thereby improving the air tightness of the protective door. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of the protective door of the embodiment of the present application.

[0034] Figure 2 is a structural schematic view of the fiber composite material of the embodiment of the present application.

[0035] Figure 3 is a structural schematic view of the connecting piece of the embodiment of the present application.

[0036] Figure 4 is a structural schematic view of the internal locking assembly of the protective door of the embodiment of the present application.

[0037] Figure 5 is a structural schematic view of the transmission gear of the embodiment of the present application.

[0038] Figure 6 is a structural schematic view of the A-A section of the embodiment of the present application. Figure 4

[0039] Figure 7 ​is a structural schematic diagram of a sealing assembly of an embodiment of the present application.

[0040] Figure 8 is a structural schematic diagram of a door frame of an embodiment of the present application.

[0041] Reference signs: 1, door body; 11, metal frame; 111, sliding groove; 12, concrete structure; 121, first sliding groove; 122, second sliding groove; 13, embedded box; 131, connecting pipe; 2, door frame; 21, lock hole; 22, sealing groove; 3, locking assembly; 31, lock cylinder; 311, locking block; 312, limiting block; 313, fixing rod; 32, transmission gear; 321, inner gear; 322, outer gear; 323, transmission shaft; 33, first transmission rod; 331, tooth; 4, sealing assembly; 41, first sealing block; 411, first sliding block; 42, second sealing block; 421, second sliding block; 43, second transmission rod; 44, push rod; 5, hinge; 6, fiber composite material; 7, manual rotary disc; 71, toothed disc; 8, connecting piece; 81, connecting rod; 811, convex rib; 812, groove; 82, connecting plate; 821, clamping block; 83, positioning strip. DETAILED DESCRIPTION

[0042] The above description is made in conjunction with the accompanying drawings Figure 1 to the accompanying drawings Figure 8 The present application is further described in detail.

[0043] With reference to Figure 1 and Figure 2 , a concrete underground security door comprises a door body 1, a door frame 2, a locking assembly 3 and a sealing assembly 4, the door body 1 is connected with the door frame 2 through a hinge 5, the door frame 2 is installed in a primary structure, the door body 1 comprises a metal frame 11 and a concrete structure 12, the concrete structure 12 is filled in the metal frame 11 through secondary pouring, the metal frame 11 is a groove-shaped structure formed by bending a metal plate and the two ends are bent and welded to form a peripheral shape; the concrete structure 12 is provided with a fiber composite material 6, the fiber composite material 6 is arranged in a double-layer and double-directional manner, the fiber composite material 6 arranged in the concrete structure 12 can improve the tensile, compressive and shearing properties of the concrete structure 12, thereby increasing the impact resistance of the concrete structure 12. The concrete structure 12 is rotationally connected with a manual rotary disc 7 capable of simultaneously opening or closing the locking assembly 3 and the sealing assembly 4, the manual rotary disc 7 and the hinge 5 are arranged on the same side of the door body 1, the manual rotary disc 7 can simultaneously open or close the locking assembly 3 and the sealing assembly 4, thereby improving the operation efficiency.

[0044] With reference to Figure 2 In the embodiment, the fiber composite material 6 is in a strip shape, the fiber composite material 6 is provided with a connecting piece 8 at the intersection, the connecting piece 8 can fix and support the fiber composite material 6.

[0045] With reference to Figure 2 and Figure 3 The connecting piece 8 comprises a connecting rod 81 and two connecting plates 82, the two connecting plates 82 are fixedly arranged at the two ends of the connecting rod 81, and a plurality of clamping blocks 821 for clamping the fiber composite material 6 are arranged on the faces of the two connecting plates 82 away from the connecting rod 81. In the embodiment, four clamping blocks 821 are arranged on each connecting plate 82, and the four clamping blocks 821 are arranged at the four corners of the connecting plate 82. The clamping blocks 821 facilitate the placement and installation of the fiber composite material 6.

[0046] In specific implementation, after the fiber composite material 6 is clamped to the connecting plate 82, the fiber composite material 6 can be fixed by means of binding a thin steel wire, thereby enhancing the connection strength between the fiber composite material 6 and the connecting piece 8.

[0047] With reference to Figure 1 and Figure 3 A plurality of convex ribs 811 and a plurality of recesses 812 are arranged on the shaft of each connecting rod 81 in the axial direction. In the embodiment, two convex ribs 811 and two recesses 812 are arranged on each connecting rod 81, and the convex ribs 811 and the recesses 812 are arranged at intervals. The convex ribs 811 and the recesses 812 can increase the contact area between the connecting rod 81 and the concrete structure 12, thereby increasing the connection strength between the connecting rod 81 and the concrete structure 12.

[0048] With reference to Figure 1 and Figure 3 A positioning strip 83 is fixedly arranged between the connecting rods 81. The positioning strip 83 is arranged at the two ends of the connecting rod 81 and abuts against the connecting plate 82 in a double-layer and bidirectional manner, and the two ends of the positioning strip 83 are fixedly welded to the inner wall of the metal frame 11. In the embodiment, the positioning strip 83 can be a thin steel bar. The fixing mode between the positioning strip 83 and the connecting rod 81 can be welding, binding or the like, as long as the fixing relationship between the two can be achieved. The connecting piece 8 is fixed by means of the positioning strip 83, thereby reducing the influence of the shaking of the connecting piece 8 in the process of pouring the concrete.

[0049] With reference to Figure 4 and Figure 5, the locking assembly 3 comprises a lock core 31, a transmission gear 32 and a first transmission rod 33, the lock core 31 comprises a locking block 311 and a limiting block 312, the transmission gear 32 comprises an inner gear 321, an outer gear 322 and a transmission shaft 323, the inner gear 321 and the outer gear 322 are fixedly arranged at two ends of the transmission shaft 323 by welding, a gear 331 is arranged on the first transmission rod 33, the hand-operated rotary disc 7 is fixedly connected with a gear disc 71, the locking block 311 and the limiting block 312 are fixedly connected, a fixed rod 313 with a gear is fixedly connected to the limiting block 312, the fixed rod 313 is engaged with the inner gear 321, the outer gear 322 is engaged with one end of the first transmission rod 33, the other end of the first transmission rod 33 is engaged with the gear disc 71, and the first sliding groove 121, in which the first transmission rod 33 slides, is fixedly arranged on the surface of the concrete structure 12. In the embodiment, the number of the lock core 31 is four, two of which are arranged inside the door body 1 on the left and the right, and only one mark is drawn for each of the lock core 31, the transmission gear 32 and the first transmission rod 33 for the sake of simplicity and clarity of the drawings.

[0050] With reference to Figure 4 and Figure 6 , the pre-buried box 13 is arranged in the concrete structure 12, the lock core 31 and the inner gear 321 are integrated in the pre-buried box 13, the outer gear 322 extends out of the pre-buried box 13 and is engaged with the first transmission rod 33, the connecting pipe 131, through which the transmission shaft 323 passes, is arranged on the pre-buried box 13, and the connecting pipe 131 is in communication with the inside of the pre-buried box 13, and the lock core 31 and the transmission gear 32 are pre-buried and installed in the concrete structure 12 by arranging the pre-buried box 13.

[0051] With reference to Figure 1 and Figure 6 , the pre-buried box 13 is pre-buried between the fiber composite materials 6, and the outer side surface of the pre-buried box 13 is fixedly connected with the inner wall of the metal frame 11, the lock core 31 abuts against the door frame 2 through the connecting part of the pre-buried box 13 and the metal frame 11, the side wall of the door frame 2 is provided with a lock hole 21 for the lock core 31 to abut against, the first transmission rod 33 is driven to move by rotating the hand-operated rotary disc 7, the first transmission rod 33 drives the outer gear 322 engaged therewith to rotate, the outer gear 322 drives the coaxially arranged inner gear 321 to rotate, the inner gear 321 drives the fixed rod 313 to move, the fixed rod 313 drives the lock core 31 to move and is inserted into the lock hole 21, and the locking is completed.

[0052] With reference to Figure 7 , the sealing assembly 4 comprises a first sealing block 41, a second sealing block 42 and a second transmission rod 43, the first sealing block 41 is fixedly connected with one end of the first transmission rod 33 away from the gear disc 71, the second sealing block 42 is fixedly connected with a push rod 44, the push rod 44 is rotatably connected with the second transmission rod 43, the second transmission rod 43 is rotatably connected with the first transmission rod 33, and the second sliding groove 122, in which the push rod 44 slides, is arranged on the concrete structure 12.

[0053] With reference to Figure 7 and Figure 8 , the door frame 2 is provided with a sealing groove 22 for abutting the first sealing block 41 and the second sealing block 42, and the inner wall of the sealing groove 22 is provided with a sealing gasket, which is made of high-temperature-resistant and corrosion-resistant rubber, thereby improving the air tightness of the protective door.

[0054] By rotating the manual rotary disc 7 to drive the first transmission rod 33 to move, the first transmission rod 33 drives the second transmission rod 43 to move, and the second transmission rod 43 drives the push rod 44 to move. Under the limitation of the second sliding groove 122, the push rod 44 pushes the second sealing block 42 to insert into the sealing groove 22, and the first sealing block 41 is directly inserted into the sealing groove 22 under the pushing of the first transmission rod 33, thereby completing the sealing operation of the protective door.

[0055] With reference to Figure 7 , the first sealing block 41 is provided with a first sliding block 411 at each end, the first sliding block 411 is slidingly inserted into the first sealing block 41, and the first sliding block 411 and the first sealing block 41 are connected by a spring; the second sealing block 42 is provided with a second sliding block 421 at each end, the second sliding block 421 is slidingly inserted into the second sealing block 42, and the second sliding block 421 and the second sealing block 42 are connected by a spring; the first sliding block 411 and the second sliding block 421 abut each other, and in the sliding process of the first sealing block 41 and the second sealing block 42, the first sliding block 411 at each end of the first sealing block 41 moves relatively under the action of the spring, and the second sliding block 421 at each end of the second sealing block 42 moves relatively under the action of the spring, so that the first sliding block 411 and the second sliding block 421 always maintain the state of abutting each other in the sliding process, thereby improving the air tightness of the protective door.

[0056] With reference to Figure 1 and Figure 7 , the outer side of the metal frame 11 is provided with a sliding groove 111, the sliding groove 111 and the manual rotary disc 7 are arranged on the same side of the door body 1, the first sealing block 41 and the second sealing block 42 can slide in the sliding groove 111, the first transmission rod 33 is fixedly connected with the first sealing block 41 through the sliding groove 111, and the push rod 44 is fixedly connected with the second sealing block 42 through the sliding groove 111.

[0057] After the protective door is closed, the sliding groove 111 corresponds to the slot of the sealing groove 22, and by rotating the manual rotary disc 7 to complete the locking, the first sealing block 41 and the second sealing block 42 can also be slidingly inserted into the sealing groove 22, thereby completing the sealing operation of the protective door and improving the operation efficiency.

[0058] The implementation principle of the embodiment of the application is that the double-layer and double-direction arranged fiber composite material 6 is arranged at the two ends of the connecting piece 8, is clamped and arranged on the connecting plate 82 through the clamping block 821, the positioning strip 83 is fixedly arranged between the connecting rods 81, the positioning strip 83 is double-layer and double-direction arranged at the two ends of the connecting rod 81 and abuts on the connecting plate 82, the two ends of the positioning strip 83 are welded and fixed with the inner wall of the metal frame 11, the embedded box 13 is arranged in the concrete structure 12, the lock cylinder 31 and the transmission gear 32 are integrated in the embedded box 13, the external gear 322 extends out of the embedded box 13 and the concrete structure 12, the formwork is supported and the concrete is poured to form the concrete structure 12, the metal frame 11 and the concrete structure 12 form the door body 1, the locking assembly 3 and the sealing assembly 4 are installed, the door body 1 is installed on the door frame 2 through the hinge 5, the first transmission rod 33 is moved by rotating the manual turntable 7, the first transmission rod 33 drives the external gear 322 meshing therewith to rotate, the external gear 322 drives the coaxially arranged internal gear 321 to rotate, the internal gear 321 drives the fixed rod 313 to move, the fixed rod 313 drives the lock cylinder 31 to move and is inserted into the lock hole 21, the locking of the protective door is completed, while rotating the manual turntable 7, the first transmission rod 33 drives the second transmission rod 43 to move, the second transmission rod 43 drives the push rod 44 to move, the push rod 44 is limited in the second sliding groove 122 and pushes the second sealing block 42 to be inserted into the sealing groove 22, the first sealing block 41 is directly inserted into the sealing groove 22 under the pushing of the first transmission rod 33, and the sealing operation of the protective door is completed. The fiber composite material 6 is arranged in the concrete structure 12, which can improve the tensile, compressive and shear properties of the concrete structure 12, thereby increasing the impact resistance of the concrete structure 12, and the manual turntable 7 can simultaneously open or close the locking assembly 3 and the sealing assembly 4, thereby improving the operation efficiency.

[0059] The embodiments of the specific implementation are the preferred embodiments of the application, and are not limited to the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A concrete underground security door comprising a door body, a door frame, a locking assembly and a sealing assembly, the door body and the door frame are connected by a hinge, characterized in that, The door body comprises a metal frame and a concrete structure, the concrete structure is filled in the metal frame, and a fiber composite material is arranged in the concrete structure, the fiber composite material is arranged in two layers and in two directions; a manual rotating disc capable of simultaneously opening or closing the locking assembly and the sealing assembly is rotatably connected to the concrete structure; The locking assembly comprises a lock cylinder, a transmission gear and a first transmission rod, the lock cylinder comprises a locking block and a limiting block, the transmission gear comprises an inner gear, an outer gear and a transmission shaft, the inner gear and the outer gear are fixedly arranged at two ends of the transmission shaft, and a gear is arranged on the first transmission rod; the manual rotating disc is fixedly connected with a gear disc; The locking block and the limiting block are fixedly connected, a fixed rod with a gear is fixedly connected to the limiting block, the fixed rod is engaged with the inner gear, the outer gear is engaged with one end of the first transmission rod, and the other end of the first transmission rod is engaged with the gear disc; the sealing assembly comprises a first sealing block, a second sealing block and a second transmission rod, two first sealing blocks are arranged above and below, and two second sealing blocks are arranged left and right, one end of the first sealing block away from the gear disc is fixedly connected with the first transmission rod, the second sealing block is fixedly connected with a push rod, the push rod is rotatably connected with the second transmission rod, the second transmission rod is rotatably connected with the first transmission rod, and a sealing groove for abutting the first sealing block and the second sealing block is arranged on the door frame; first sliding blocks are arranged at two ends of the first sealing block, the first sliding blocks are slidably inserted into the first sealing block, and the first sliding blocks and the first sealing block are connected by springs; second sliding blocks are arranged at two ends of the second sealing block, the second sliding blocks are slidably inserted into the second sealing block, and the second sliding blocks and the second sealing block are connected by springs, and the first sliding blocks abut against the second sliding blocks; Crossing parts of the fiber composite material are provided with connecting pieces, the connecting pieces comprise a connecting rod and two connecting plates, the two connecting plates are fixedly arranged at two ends of the connecting rod, and a plurality of clamping blocks for clamping the fiber composite material are arranged on surfaces of the two connecting plates away from the connecting rod; Positioning strips are fixedly arranged between the connecting rods, the positioning strips are arranged in two layers and in two directions, and two ends of the positioning strips are fixedly connected with inner walls of the metal frame.

2. A below-grade concrete security door according to claim 1, wherein, A plurality of convex ribs and grooves are arranged on the connecting rod in an axial direction.

3. A below-grade concrete security door according to claim 1, wherein, A pre-embedded box is arranged in the concrete structure, the lock cylinder and the transmission gear are integrated in the pre-embedded box, and the outer gear protruding from the pre-embedded box and the concrete structure is engaged with the first transmission rod.

4. A below-grade concrete security door according to claim 3, wherein, The pre-embedded box is embedded between the fiber composite materials, an outer side surface of the pre-embedded box is fixedly connected with the inner walls of the metal frame, the lock cylinder abuts against the door frame by penetrating through the pre-embedded box and the metal frame, and a lock hole for abutting the lock cylinder is arranged on a side wall of the door frame.

5. A below-grade concrete security door according to claim 1, wherein, The outer side of the metal frame is provided with a sliding groove, the first sealing block and the second sealing block can slide in the sliding groove, the first transmission rod is fixedly connected with the first sealing block through the sliding groove, and the push rod is fixedly connected with the second sealing block through the sliding groove.

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