An underground defensive shelter

Through the combined structure of corrugated plate, square pipe and insulation board, combined with the design of reinforced ribs and channel steel, the strength and insulation problems of the square cabin are solved, efficient sound insulation and air flow, and the overall performance and economy of the square cabin are improved. performance.

CN113152933BActive Publication Date: 2024-12-20JIANGSU XUFU INTEGRATED TECH CO LTD
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Patent Information

Application Number
CN202110276090.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-03-15
Publication Date
2024-12-20
Estimated Expiration
2041-03-15

AI Technical Summary

Technical Problem

The wall panels of the existing square cabin are relatively low in strength, easy to damage, and are not ideal in terms of insulation and economic performance, making it difficult to create a square cabin with high strength, low cost and insulation effect.

Method used

Using a combined structure of corrugated plate, square tube and insulation board, the corrugated plate and insulation board are connected through square tubes, the insulation material is added to improve sound insulation effect, and reinforcement ribs and channel steel are installed on the top and bottom plates to enhance structural strength, and the air is replaced. Devices and partitions to improve space utilization.

Benefits of technology

It achieves high strength, good sound insulation and thermal insulation effects of the square cabin, extends service life, reduces cost, improves space utilization, and ensures internal air circulation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN113152933B_ABST
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Abstract

The present invention discloses a square cabin for underground defense, comprising a square cabin body, the square cabin body comprising a bottom plate, a front plate, a rear plate, two side plates and a top plate; the short side of the bottom plate is respectively fixed with a front plate and a rear plate, the long side of the bottom plate is respectively fixed with a side plate, and the top plate is sealed and fixed to the top of the front plate, the rear plate and the two side plates; the outermost layers of the front plate, the rear plate and the two side plates are corrugated plates, the middle layer is a square tube, and the innermost layer is a thermal insulation plate; the corrugated plates are provided with trapezoidal bosses protruding outward and having a trapezoidal cross section at equal intervals, and a square tube is provided between the inner side of each trapezoidal boss and the thermal insulation plate; an air exchange device is provided in the square cabin body. The front plate, the rear plate and the two side plates of the square cabin body in the present invention are all in the form of a combination of corrugated plates, square tubes and thermal insulation plates, which can not only increase the strength of the square cabin body, but also increase its thermal insulation effect. Through the provided air exchange device, air replacement in the square cabin body can be achieved to keep fresh air circulating.
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Description

Technical Field

[0001] The invention belongs to the technical field of shelters, and in particular relates to a shelter for underground defense. Background Art

[0002] Square cabins have been applied to various fields because they are easy to move and install. In order to improve the thermal insulation effect of square cabins in the prior art, the wall panels are generally made of thermal insulation boards and corrugated boards bonded together to form wall panels. Such wall panels have low strength and are easily damaged. Square cabins with better strength have higher costs. Considering that their overall thermal insulation, strength and economic performance are not ideal, how to manufacture a square cabin with high strength, low cost and thermal insulation effect is an urgent problem to be solved. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide an underground defense shelter in view of the shortcomings of the prior art.

[0004] The technical solution for realizing the present invention is:

[0005] The present invention discloses a square cabin for underground defense, comprising a cabin body, wherein the cabin body comprises a bottom plate, a front plate, a rear plate, two side plates and a top plate; the front plate and the rear plate are fixed to the short side of the bottom plate, respectively, and the side plates are fixed to the long side of the bottom plate, respectively, the side plates are sealed to the connected front plate and rear plate, respectively, and the top plate is sealed to the top of the front plate, the rear plate and the two side plates; the outermost layers of the front plate, the rear plate and the two side plates are corrugated plates, the middle layer is square tubes, and the innermost layer is thermal insulation plates; the corrugated plates are provided with trapezoidal bosses protruding outwards and having trapezoidal cross-sections at equal intervals, the trapezoidal bosses are integrally formed with the metal corrugated plate body, and a square tube is provided between the inner side of each trapezoidal boss and the thermal insulation plate; a ventilation device is retained in the cabin body. The present invention connects the corrugated board and the insulation board through square tubes. The square tubes not only play a role in strengthening the connection, but also have insulation materials arranged between the square tubes arranged between the corrugated board and the insulation board, which has a good sound insulation effect. In addition, the insulation board is arranged, so that the square cabin body has higher strength, good sound insulation and heat preservation effects, and the use effect of the square cabin is enhanced.

[0006] Preferably, a front door is provided on the front plate, and the ventilation device includes an exhaust pipe, an air inlet pipe and a fresh air blower, and the fresh air blower replaces the air in the cabin body through the exhaust pipe and the air inlet pipe, and the exhaust pipe and the air inlet pipe pass through the front plate and replace the air with the outside of the cabin body. By providing the ventilation device, the present invention can better realize the exchange of the air inside the cabin body with the fresh air outside, so that the personnel in the cabin body can better carry out activities.

[0007] Preferably, a partition is provided in the cabin body between the front plate and the rear plate, the partition divides the cabin body into a front compartment and a rear compartment, a second door is provided on the partition, and the front compartment enters the rear compartment through the second door. The present invention divides the internal space of the cabin body by providing the partition and the second door, thereby increasing the utilization rate of the space.

[0008] Preferably, the partition is made of an insulation board, and a reinforcement piece is provided between the corners of the partition and the adjacent wallboard, and the reinforcement piece includes three extension pieces that are perpendicular to each other and intersect at one point, and the intersection of the reinforcement piece is located at the corners of the partition. The partition in the present invention is made of an insulation board, which not only has the effect of heat preservation and isolation, but also has the effect of sound insulation; the installation of the partition is more stable through the provision of the reinforcement piece.

[0009] Preferably, lockers and water tanks are respectively provided in the front compartments on both sides of the second-floor door; the lockers are used to store items; the water tank is connected to the direct drinking machine through a pipe, a filter is provided on the pipe between the water tank and the direct drinking machine, and a fresh air blower is fixed above the water tank. The filter in the present invention is fixed on the inner side of the front panel, the direct drinking machine is fixed on the partition, a power distribution cabinet is fixed on the partition above the direct drinking machine, the power distribution cabinet controls the electrical equipment in the cabin body, a protective door is provided on the water tank side of the front compartment, the water tank, filter, direct drinking machine, power distribution cabinet and fresh air blower are located on the inner side of the protective door, and the protective door needs to be opened when taking water through the direct drinking machine; the present invention arranges lockers and water tanks in the front compartment, and makes a reasonable layout according to the space of the front compartment to make full use of the space of the front compartment.

[0010] Preferably, the air outlet of the air inlet duct of the fresh air fan is located above the rear compartment, and the air inlet of the air inlet duct extends out of the cabin body; the air inlet of the exhaust duct of the fresh air fan is located below the rear compartment, and the air outlet of the exhaust duct extends out of the cabin body; by limiting the positions of the air inlet duct and exhaust duct of the fresh air fan, the replacement of air inside the cabin body can be better achieved.

[0011] Preferably, the rear compartments on both sides of the second-floor door are provided with folding computer desks and chairs and air inlets of the exhaust duct respectively; the air inlet of the exhaust duct is located below the rear compartment; a combined folding desk and chair is provided in the middle of the rear compartment; a storage rack equipped with a folding bed is provided on the rear side of the rear compartment. The square cabin of the present invention arranges the equipment area and the office area in the front compartment and the rear compartment respectively through partitions, and makes a reasonable layout according to the space and area attributes in the square cabin body; in order to ensure the cleanliness of the rear compartment, the folding bed is arranged in the storage rack, and when the folding bed is not in use, it is folded up and the door of the storage rack is closed; when the folding bed is needed, the computer desk and chair and the folding desk and chair in the rear compartment are folded and put away, and the folding bed is taken out of the storage rack and unfolded for use; by installing the folding equipment in the rear compartment, the limited space of the rear compartment can be fully utilized, thereby improving the space utilization rate.

[0012] Preferably, the bottom of the bottom plate is parallel and evenly arranged channel steels, the concave grooves of the channel steels are opened toward the side, polyurethane insulation material is filled between two adjacent channel steels, and the wing plates on the top of the channel steels are fixedly connected to the steel plates. An anti-skid plate can also be laid on the upper surface of the bottom plate of the present invention to prevent people from slipping in the cabin body. The bottom plate of the present invention adopts channel steels, and anti-rust paint can be sprayed on the outer surface of the channel steels. The installation of the channel steels can increase the distance between the bottom plate and the ground, prevent moisture from returning to the ground from corroding and damaging the cabin body, and increase its service life.

[0013] Preferably, the top plate comprises a steel plate, square tubes and an insulation plate; the steel plate is located on the top of the top plate, square tubes are arranged parallel and evenly between the steel plate and the insulation plate, and insulation material is filled between adjacent square tubes.

[0014] Preferably, the bottom of the insulation board of the top board is fixed with reinforcing ribs in the vertical direction of the square tube. Considering that the top board will be affected by its own weight, the present invention provides reinforcing ribs at the bottom, which can enhance the strength of the top board and increase the service life of the top board.

[0015] The load-bearing capacity of the shelter structure of the present invention can reach 5T / m 2 , has a wide range of applications.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] (1) The front plate, rear plate and side plate of the present invention are connected to the corrugated plate and the insulation plate through square tubes. The square tubes not only play a role in strengthening the connection, but also the square tubes arranged between the corrugated plate and the insulation plate are provided with insulation materials, which have a good sound insulation effect. In addition, the insulation plate is provided, so that the square cabin body has higher strength, good sound insulation and heat preservation effects, enhances the ability of the square cabin to resist external forces, and improves its service life. Moreover, the present invention only uses corrugated plates, square tubes and insulation plates to manufacture the front plate, rear plate and side plate, which has a low cost and good economic performance.

[0018] (2) The present invention provides a ventilation device in the cabin body, through which the air inside and outside the cabin body are replaced, thereby ensuring air circulation and ensuring that people inside the cabin can breathe fresh air.

[0019] (3) The present invention can effectively divide the space inside the cabin body by arranging partitions therein. The partitions are made of insulation boards, which not only have the effects of heat preservation and isolation, but also have the effect of sound insulation.

[0020] (4) The bottom of the base plate of the present invention adopts channel steel as a support. The installation of the channel steel can increase the distance between the base plate and the ground, prevent the moisture on the ground from corroding and damaging the cabin body, and increase its service life; polyurethane insulation material is filled between adjacent channel steels to increase the insulation effect of the base plate.

[0021] (5) In order to enhance the supporting capacity of the top plate, the present invention provides reinforcing ribs at the bottom of the top plate to prevent the top plate from collapsing. The design of the reinforcing ribs can enhance the strength of the top plate and increase the service life of the top plate, thereby extending the service life of the entire cabin.

[0022] (6) The present invention divides the cabin body into a front compartment and a rear compartment by a partition, and sets up an equipment area and an office area in the front compartment and the rear compartment respectively according to functional attributes and usage requirements, and reasonably designs the internal layout to fully utilize the internal space of the cabin body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 It is a structural schematic diagram of the shelter of the present invention;

[0025] Figure 2 This is a structural schematic diagram of the shelter of the present invention without the top plate;

[0026] Figure 3 This is a schematic diagram of the internal structure of the shelter of the present invention without one side plate and the top plate;

[0027] Figure 4 This is a schematic diagram of the internal structure of the shelter of the present invention without the front plate, one side plate and the top plate;

[0028] Figure 5 A top view of the top plate of the present invention;

[0029] Figure 6 for Figure 5 Sectional view of the AA section plane;

[0030] Figure 7 A top view of the bottom plate of the present invention;

[0031] Figure 8 for Figure 7 Sectional view of the BB section plane.

[0032] In the figure, 1-cabin body, 2-top plate, 3-front plate, 4-rear plate, 5-side plate, 6-bottom plate, 7-corrugated plate, 8-square tube, 9-insulation board, 91-reinforcement rib, 10-channel steel, 11-steel plate, 12-front door, 13-second door, 131-partition, 132-reinforcement, 14-air exchange device, 141-fresh air fan, 142-air inlet pipe, 143-exhaust pipe, 15-folding tables and chairs, 151-computer tables and chairs, 16-folding bed, 17-storage rack, 18-water tank, 181-filter, 182-direct drinking machine, 19-locker, 20-power distribution cabinet. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0034] Embodiment: An underground defense shelter, as shown in the attached Figure 1 and 2As shown, the cabin body 1 includes a bottom plate 6, a front plate 3, a rear plate 4, two side plates 5 and a top plate 2; the short side of the bottom plate 6 is respectively fixed with the front plate 3 and the rear plate 4, the long side of the bottom plate 6 is respectively fixed with the side plates 5, the side plates 5 are respectively sealed with the front plate 3 and the rear plate 4 connected thereto, and the top plate 2 is sealed and fixed with the top of the front plate 3, the rear plate 4 and the two side plates 5; the outermost layers of the front plate 3, the rear plate 4 and the two side plates 5 are corrugated plates 7, the middle layer is square tubes 8, and the innermost layer is insulation plates 9, which are made of polyurethane insulation material; the corrugated plates 7 are evenly spaced. There is a trapezoidal boss with a trapezoidal cross-section that protrudes outward. The trapezoidal boss is integrally formed with the metal corrugated plate body. A square tube 8 is provided between the inner side of each trapezoidal boss and the insulation plate 9, and polyurethane insulation material is filled between the square tubes. A ventilation device 14 is provided in the cabin body 1. The ventilation device 14 includes an exhaust duct 143, an air inlet duct 142 and a fresh air fan 141. The fresh air fan 141 replaces the air in the cabin body 1 through the exhaust duct 143 and the air inlet duct 142. The exhaust duct 143 and the air inlet duct 142 pass through the front plate 3 to replace the air with the outside of the cabin body 1. In this embodiment, by providing a ventilation device 14, the exchange of air inside the shelter body 1 and fresh air outside can be better achieved, so that people in the shelter body 1 can better carry out activities; in this embodiment, the corrugated board 7 and the insulation board 9 are connected by a square tube 8. The square tube 8 not only plays a role in strengthening the connection, but also the square tube 8 provided between the corrugated board 7 and the insulation board 9 is provided with insulation material, which has a good sound insulation effect. In addition, the insulation board 9 is provided, so that the shelter body 1 has higher strength, good sound insulation and heat preservation effects, and the use effect of the shelter is enhanced.

[0035] As attached Figure 7 and 8 As shown, the bottom of the bottom plate 6 is a channel steel 10 that is evenly and parallelly arranged, and the concave groove of the channel steel 10 opens to the side. Polyurethane insulation material is filled between two adjacent channel steels 10 to increase the insulation performance of the bottom plate 6, and the wing plate on the top of the channel steel 10 is fixedly connected to the steel plate 11. An anti-skid plate can also be laid on the upper surface of the bottom plate 6 of this embodiment to prevent people from slipping in the cabin body 1. The bottom plate 6 of this embodiment adopts the channel steel 10, and anti-rust paint can be sprayed on the outer surface of the channel steel 10. The installation of the channel steel 10 can increase the distance between the bottom plate 6 and the ground, preventing the moisture on the ground from corroding and damaging the cabin body 1, thereby increasing its service life; as shown in the attached figure Figure 5 and 6As shown, the top plate 2 includes a steel plate 11, a square tube 8 and an insulation plate 9; the steel plate 11 is located at the top of the top plate 2, and the square tube 8 is evenly and parallelly arranged between the steel plate 11 and the insulation plate 9. In order to increase the insulation performance of the top plate 2, polyurethane insulation material is filled between adjacent square tubes 8; the bottom of the insulation plate 9 of the top plate 2 is fixed with a reinforcing rib 91 along the vertical direction of the square tube 8. In this embodiment, considering that the top plate 2 will be affected by its own weight, a reinforcing rib 91 is specially arranged at its bottom. By setting the reinforcing rib 91, the strength of the top plate 2 is enhanced and the service life of the top plate 2 is increased.

[0036] In order to ensure the entry and exit of personnel, the shelter in this embodiment is provided with a front door 12 on the front panel 3, and a door handle is installed on the front door 12. Windows can also be provided on the front panel, rear panel or side panel; Figure 3 and 4 As shown, in order to optimize the utilization rate of the internal space of the cabin body, a partition 131 is provided in the cabin body 1 between the front plate 3 and the rear plate 4. The partition 131 divides the cabin body into a front compartment and a rear compartment. A second door 13 is provided on the partition 131, and a door handle is also provided on the second door 13. The front compartment enters the rear compartment through the second door. In this embodiment, the internal space of the cabin body is divided by the arrangement of the partition 131 and the second door, thereby increasing the utilization rate of the space. In this embodiment, the air outlet of the air inlet pipe 142 of the fresh air fan 141 is located above the rear compartment, and the air inlet of the air inlet pipe 142 extends out of the cabin body. The air inlet of the exhaust pipe 143 of the fresh air fan 141 is located below the rear compartment, and the air outlet of the exhaust pipe 143 extends out of the cabin body. By limiting the positions of the air inlet pipe 142 and the exhaust pipe 143 of the fresh air fan 141, the replacement of the air inside the cabin body can be better achieved.

[0037] The partition 131 in this embodiment is a heat-insulating board. A reinforcement piece 132 is provided between the corners of the partition 131 and the adjacent wall panels. The reinforcement piece 132 includes three extension pieces that are perpendicular to each other and intersect at one point. The intersection of the reinforcement piece 132 is located at the corners of the partition 131. The partition 131 in this embodiment is a heat-insulating board. The heat-insulating board not only has the effects of heat preservation and isolation, but also has the effect of sound insulation. The installation of the partition 131 is more stable through the provision of the reinforcement piece 132. Lighting equipment and power sockets are provided in both the front compartment and the rear compartment. The switches of the lighting equipment and the power sockets are provided on the adjacent wall panels. As shown in the attached figure, Figure 4As shown, a locker 19 and a water tank 18 are respectively arranged in the front compartments on both sides of the second-floor door 13; the locker 19 is used to store items, and the size of the locker is reasonably installed according to the space of the front compartment, and a locker with multiple layers of small compartments and doors is adopted; in order to ensure the safety of drinking water in the cabin body, the water tank 18 in this embodiment is connected with the direct drinking machine 182 through a pipeline, and a filter 181 is arranged on the pipeline between the water tank 18 and the direct drinking machine 182, and the water in the water tank is filtered and purified by the filter to ensure the safety of drinking water; a fresh air fan 141 is fixed above the water tank; the filter 181 of this embodiment is fixed on the inner side of the front plate, The direct drinking machine 182 is fixed on the partition 131, and a power distribution cabinet 20 is fixed on the partition above the direct drinking machine 182. The power distribution cabinet 20 controls the electrical equipment in the cabin body 1. A protective door is provided on the water tank side of the front compartment. The water tank 18, filter 181, direct drinking machine 182, power distribution cabinet 20 and fresh air fan 141 are located on the inside of the protective door. When taking water through the direct drinking machine, the protective door needs to be opened. The setting of the protective door can make the layout of the front compartment appear beautiful and tidy without affecting the use of the equipment in the protective door. In this embodiment, a storage cabinet and a water tank are set in the front compartment, and a reasonable layout is made according to the space of the front compartment to make full use of the space of the front compartment.

[0038] As attached Figure 3 As shown, the rear compartments on both sides of the second-layer door 13 are respectively provided with folding computer tables and chairs 151 and air inlets of the exhaust duct 143; the air inlet of the exhaust duct 143 is located below the rear compartment; a combined folding table and chair 15 is provided in the middle of the rear compartment, and the specific model of the folding table and chair 15 needs to be configured according to specific usage requirements; a storage rack 17 equipped with a folding bed 16 is provided on the rear side of the rear compartment, and the folding bed 16 in this embodiment is preferably provided with two groups, and the storage rack is horizontally divided into three parts, and the two groups of folding beds are respectively arranged in the spaces on both sides of the storage rack, and opening and closing doors are arranged on both sides of the storage rack, and the middle part of the storage rack is divided into multiple layers of small compartments by a plurality of horizontal boards for storing Commonly used items; the cabin of this embodiment uses a partition 131 to arrange the equipment area and the office area in the front compartment and the rear compartment respectively, and makes a reasonable layout according to the space and area attributes in the cabin body; in order to ensure the cleanliness of the rear compartment, the folding bed 16 is arranged in the storage rack 17. When the folding bed 16 is not in use, it is folded up and the door of the storage rack 17 is closed; when the folding bed 16 is needed, the folding tables and chairs 15 and computer tables and chairs 151 in the rear compartment are folded and stored, and the folding bed 16 is taken out of the storage rack 17 and unfolded for use; by installing folding equipment in the rear compartment, the limited space in the rear compartment can be fully utilized, thereby improving space utilization. The load-bearing capacity of the cabin body structure in this embodiment can reach 5T / m 2 , has a wide range of applications.

[0039] The square cabin in this embodiment can be applied to temporary office places or other application places as needed, and the equipment arranged therein can be replaced according to actual needs; the combination of corrugated boards, square tubes and insulation boards used in this embodiment has high strength, good sound insulation and heat preservation effects, and the materials used are low in cost and can be widely used; by setting up a ventilation device, the air in the square cabin body can be replaced to ensure the circulation of fresh air; by setting up a partition therein, the space in the square cabin body can be effectively divided, so that the equipment in the square cabin body can be separately arranged according to function, and the layout inside it can be reasonably designed.

[0040] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underground defense shelter, characterized in that: The square cabin body comprises a bottom plate, a front plate, a rear plate, two side plates and a top plate; the front plate and the rear plate are fixed to the short side of the bottom plate, the side plates are fixed to the long side of the bottom plate, the side plates are sealed to the front plate and the rear plate connected to each other, and the top plate is sealed to the top of the front plate, the rear plate and the two side plates; the outermost layers of the front plate, the rear plate and the two side plates are corrugated plates, the middle layer is square tubes, and the innermost layer is thermal insulation plates; the corrugated plates are provided with trapezoidal bosses protruding outwards and having trapezoidal cross sections at equal intervals, the trapezoidal bosses are integrally formed with the metal corrugated plate body, a square tube is provided between the inner side of each trapezoidal boss and the thermal insulation plate, and thermal insulation material is provided between the square tubes provided between the corrugated plates and the thermal insulation plates; a ventilation device is provided in the square cabin body; A front door is provided on the front plate, and the air exchange device includes an exhaust duct, an air inlet duct and a fresh air fan. The fresh air fan replaces the air in the cabin body through the exhaust duct and the air inlet duct. The exhaust duct and the air inlet duct pass through the front plate to replace the air with the outside of the cabin body.

2. The underground defense shelter according to claim 1, characterized in that: A partition is arranged in the cabin body between the front plate and the rear plate, and the partition divides the cabin body into a front compartment and a rear compartment. A second door is arranged on the partition, and the front compartment enters the rear compartment through the second door.

3. The underground defense shelter according to claim 2, characterized in that: The partition is made of an insulation board, and a reinforcement piece is arranged between the corners of the partition and the adjacent wall panels. The reinforcement piece includes three extension pieces which are perpendicular to each other and intersect at one point, and the intersection of the reinforcement piece is located at the corners of the partition.

4. The underground defense shelter according to claim 2, characterized in that: The front compartments on both sides of the second-floor door are respectively provided with lockers and water tanks; the lockers are used to store items; the water tank is connected to the direct drinking machine through a pipe, a filter is provided on the pipe between the water tank and the direct drinking machine, and a fresh air fan is fixed above the water tank.

5. The underground defense shelter according to claim 4, characterized in that: The air outlet of the air inlet duct of the fresh air fan is located above the rear compartment, and the air inlet of the air inlet duct extends out of the cabin body; the air inlet of the exhaust duct of the fresh air fan is located below the rear compartment, and the air outlet of the exhaust duct extends out of the cabin body.

6. The underground defense shelter according to claim 2, characterized in that: The rear compartments on both sides of the second-floor door are respectively provided with folding computer tables and chairs and air inlets of exhaust ducts; the air inlet of the exhaust duct is located below the rear compartment; a combined folding table and chairs are provided in the middle of the rear compartment; a storage rack with a folding bed is provided at the rear side of the rear compartment.

7. The underground defense shelter according to claim 1, characterized in that: The bottom of the base plate is parallel and evenly arranged channel steels, the concave grooves of the channel steels are opened toward the side, polyurethane insulation material is filled between two adjacent channel steels, and the wing plates on the tops of the channel steels are fixedly connected to the steel plates.

8. The underground defense shelter according to claim 1, characterized in that: The top plate comprises a steel plate, a square tube and a heat preservation plate; the steel plate is located on the top of the top plate, and the square tube is evenly and parallelly arranged between the steel plate and the heat preservation plate.

9. The underground defense shelter according to claim 5, characterized in that: A reinforcing rib is fixed on the bottom of the insulation board of the top board along the vertical direction of the square tube.