Underground structure waterlogging prevention device suitable for urban flood

Abstract

The invention relates to the technical field of waterlogging prevention devices, and discloses an underground structure waterlogging prevention device suitable for urban flood, which is arranged at an entrance / exit of an underground structure and comprises a material cavity, an inflatable or deflatable waterlogging prevention bag body, a frame body structure and a counterweight plate, a supporting area is arranged at the bottom of the gateway; an inner cavity capable of being filled with water or air is formed in the waterlogging prevention bag body, a bottom area is arranged at the bottom, a backwater area is arranged on the back, an upstream area is arranged on the front portion, and a top area is arranged on the top; the frame body structure comprises a downstream plate, a top plate, an upstream plate and a bottom plate, and the bottom of the upstream plate is in butt joint with the counterweight plate to form a closed-loop structure; buckling pieces are arranged on the two sides of the waterlogging prevention bag body. When the two buckling pieces are buckled on a wall body, the waterlogging prevention bag body is supported to be in a vertical shape through the downstream plate, the top plate, the upstream plate and the balance weight plate, and after the waterlogging prevention bag body is inflated to the set air pressure strength, the waterlogging prevention bag body seals and blocks the entrance and exit. Therefore, more reliable waterlogging prevention protection is provided for the underground structure while the waterlogging prevention performance of the entrance and exit of the underground structure is effectively improved.

Description

Technical Field

[0001] The invention patent relates to the technical field of flood prevention devices, specifically, to underground structure flood prevention devices suitable for urban floods. Background Art

[0002] When urban floods occur, underground flood disasters often occur simultaneously with urban floods. Rational allocation of disaster relief resources and adoption of flood prevention measures are very important means.

[0003] However, the construction of many urban underground structure entrances and exits did not fully consider the ability to prevent flood intrusion during design. Even if this was considered, it was mainly to set up humps or steps to block water. However, these simple physical barriers are often difficult to play an effective role in the face of large floods.

[0004] In the existing technology, flood prevention measures for the entrances and exits of urban underground structures are relatively simple and ineffective. Common measures, such as sandbag stacking, require a lot of manpower and material resources. The stacking process is time-consuming and labor-intensive, and it is difficult to complete in time in an emergency. In addition, due to the poor sealing of sandbag stacking, floods may still penetrate into the underground structure through the gaps. Sandbags are easily deformed or overturned under the impact of floods, further reducing the flood prevention performance and failing to provide a continuous, effective and stable role in flood prevention. Summary of the invention

[0005] The purpose of the present invention is to provide an underground structure flood prevention device suitable for urban floods, aiming to solve the problem of poor flood prevention performance of entrances and exits of urban underground structures in the prior art.

[0006] The present invention is implemented as follows: the entrance and exit arranged at the underground structure includes a material cavity for storing materials, a flood-proof capsule that can be rolled up and stored in the material cavity and can be inflated or deflated, a plurality of frame structures placed inside the flood-proof capsule and supporting the shape of the flood-proof capsule, and a plurality of counterweight plates; oppositely arranged walls are formed on both sides of the entrance and exit, a support area is formed at the bottom of the entrance and exit, and the support area is formed between the two walls; the plurality of frame structures are respectively arranged corresponding to the plurality of counterweight plates;

[0007] The interior of the flood-proof sac has an inner cavity that can be filled with water or air, the bottom of the flood-proof sac has a bottom area that abuts against the support area, the back of the flood-proof sac has a backwater area, the front of the flood-proof sac has a frontwater area, and the top of the flood-proof sac has a top area; the support area is concave downward to form a positioning groove arranged in a strip shape, and the positioning groove extends in a strip shape between the two walls;

[0008] The bottom of the bottom area protrudes downward with a positioning strip embedded in the positioning groove, and a plurality of the counterweight plates are laid flat on the bottom area in sequence, so that the bottom area is arranged in a flat shape; the frame structure includes a backwater plate, a top plate, a frontwater plate and a bottom plate, the top plate is arranged in the top area, and the two ends of the top plate are respectively connected to the top of the backwater plate and the top of the frontwater plate;

[0009] The backwater plate is arranged in the backwater area, and the bottom of the backwater plate is butted against the counterweight plate; the frontwater plate is arranged in the frontwater area, and the bottom of the frontwater plate is butted against the counterweight plate, and the backwater plate, the counterweight plate, the top plate, the frontwater plate and the bottom plate are enclosed to form a closed loop structure arranged in an annular manner;

[0010] Both sides of the flood-proof sac are respectively provided with fastening parts that snap onto the wall to seal the flood-proof sac at the entrance and exit; when the two fastening parts are respectively snapped onto the two walls, the bottom area abuts against the support area, and the multiple counterweight plates are pressed against the bottom area. The back water plate, top plate, front water plate and counterweight plate support the flood-proof sac in an upright state. When the flood-proof sac is inflated to the set air pressure strength, the flood-proof sac will seal the entrance and exit.

[0011] Furthermore, a buckling cavity is provided in the buckling piece, and the wall is embedded in the buckling cavity so that the buckling piece is fixedly connected to the wall.

[0012] Further, the fastening member includes a connecting plate, the two sides of the connecting plate are respectively connected to the elastic plates, the inner end of the elastic plate is connected to the side of the connecting plate, the outer end of the elastic plate extends away from the connecting plate and obliquely, and the two elastic plates and the connecting plate enclose the fastening cavity;

[0013] The elastic plate is arranged extending from the inside to the outside, and the elastic plate is arranged obliquely toward the buckling cavity. The two elastic plates clamp the wall toward each other to fix the buckling piece to the wall.

[0014] Furthermore, the bottom of the water-facing area extends outward to form a flexible pad laid on the ground, and the flexible pad extends outward away from the entrance and exit.

[0015] Furthermore, a plurality of flexible suction cups are provided at the bottom of the flexible pad, and the plurality of flexible suction cups are adsorbed on the ground to relatively fix the flexible pad on the ground.

[0016] Furthermore, a sealing strip is protruded from the periphery of the bottom area, and the sealing strip is surrounded in a closed loop along the periphery of the bottom area; when the bottom area is placed on the supporting area and the counterweight plate is pressed against the bottom area, the sealing strip is in a compressed and deformed state.

[0017] Furthermore, the sealing strip has a front section located at the front end of the bottom area; the front end of the counterweight plate protrudes forward to form a front convex portion, the bottom of the front convex portion is recessed upward to form a front groove, and the front section is embedded in the front groove;

[0018] The front end of the front convex portion has a front inclined surface extending obliquely upward, and along the direction from bottom to top of the front convex portion, the front inclined surface is arranged obliquely toward the back water area.

[0019] Furthermore, the sealing strip has a rear section located at the front end of the bottom area; the rear end of the counterweight plate protrudes backward to form a rear convex portion, the bottom of the rear convex portion is recessed upward to form a rear groove, and the rear section is embedded in the rear groove;

[0020] The rear end of the front convex portion has a rear inclined surface extending obliquely upward, and along the direction from bottom to top of the rear convex portion, the rear inclined surface is arranged obliquely away from the back water area.

[0021] Furthermore, along the direction from top to bottom of the flood-proof sac, the water-facing area is inclined away from the water-receiving area, and the water-facing plate is inclined in the same direction as the water-facing area; an adjustment ring is provided in the middle of the closed-loop structure, and the top plate, the water-receiving plate, the water-facing plate and the bottom plate are respectively hinged with adjustment rods, and the multiple adjustment rods are respectively hinged to the outer periphery of the adjustment ring, and the multiple adjustment rods are arranged around the circumference of the adjustment ring at intervals.

[0022] Furthermore, adjacent adjustment circles are respectively connected with a plurality of inflatable strips, which are arranged around the circumference of the adjustment circle at intervals, and the inflatable strips are connected with the interior of the flood-proof bladder. When the interior of the flood-proof bladder is inflated, the interior of the inflatable strips is inflated synchronously.

[0023] Compared with the prior art, the underground structure flood prevention device suitable for urban floods provided by the present invention has the following advantages:

[0024] First, in terms of sealing, the water-filled or air-filled inner cavity inside the flood-proof sac makes it possible to fit tightly against the walls of the entrances and exits after being inflated to the set air pressure, thereby sealing the entrances and exits to form a solid waterproof barrier. This provides more reliable flood-proof protection for underground structures when floods occur, reducing property losses and safety hazards caused by flood intrusion.

[0025] Secondly, in terms of stability, the closed-loop structure arranged in a ring provides circular support for the flood control capsule, allowing it to stand upright stably. Even under the impact and pressure of floods, it can ensure that the flood control capsule is not easily deformed or overturned, thereby improving the stability of the flood control capsule and providing a more durable and reliable flood control guarantee for the entrances and exits of urban underground structures.

[0026] Furthermore, in terms of installation and fixation, the positioning groove of the support area and the positioning strip of the bottom area cooperate with each other, so that the bottom of the flood control sac can be accurately embedded in and fixed on the support area. At the same time, multiple counterweight plates are laid flat on the bottom area in sequence, arranging the bottom area in a flat shape. In this way, the installation process of the flood control device is more convenient and quick, and it can be quickly deployed in place in an emergency, and play a flood control role in time, thereby improving the emergency response capabilities of urban underground structure entrances and exits to deal with flood disasters.

[0027] Finally, in terms of the overall flood prevention effect, the fasteners on both sides of the flood prevention sac can be tightly fastened to the wall, so that the flood prevention sac is sealed at the entrance and exit, forming a complete flood prevention system, which significantly improves the flood prevention performance of the entrance and exit of the urban underground structure and provides a strong guarantee for the safe and stable operation of the urban underground space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of an underground structure flood prevention device applicable to urban floods provided by the present invention;

[0029] Figure 2 It is a structural schematic diagram of the flexible pad and the flexible suction cup provided by the present invention;

[0030] Figure 3 It is a structural schematic diagram of the closed-loop structure provided by the present invention;

[0031] Figure 4 is a schematic structural diagram of a fastening member provided by the present invention;

[0032] Figure 5 It is a schematic diagram showing the flood prevention capsule provided by the present invention blocking the entrance and exit;

[0033] In the figure: wall 100, supporting area 101, fastening piece 102, fastening cavity 103, connecting plate 104, elastic plate 105, flood control sac 200, inner cavity 201, bottom area 202, back water area 203, front water area 204, top area 205, flexible pad 206, flexible suction cup 207, sealing strip 208, counterweight plate 300, back water plate 301, top plate 302, front water plate 303, bottom plate 304, adjustment ring 305, adjustment rod 306, inflation strip 307, front inclined surface 308, rear inclined surface 309. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0036] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Reference Figure 1-5 The figure shows a preferred embodiment of the present invention.

[0038] An underground structure flood control device suitable for urban floods is arranged at the entrance and exit of the underground structure, comprising a material cavity for storing materials, a flood control capsule 200 that can be rolled up and stored in the material cavity and can be inflated or deflated, a plurality of frame structures disposed inside the flood control capsule 200 and supporting the shape of the flood control capsule 200, and a plurality of counterweight plates 300; oppositely arranged walls 100 are formed on both sides of the entrance and exit, a support area 101 is formed at the bottom of the entrance and exit, and the support area 101 is formed between the two walls 100; the plurality of frame structures are arranged correspondingly to the plurality of counterweight plates 300 respectively;

[0039] The flood-proof sac 200 has an inner cavity 201 that can be filled with water or air. The bottom of the flood-proof sac 200 has a bottom area 202 that abuts against the support area 101. The back of the flood-proof sac 200 has a backwater area 203. The front of the flood-proof sac 200 has a water-facing area 204. The top of the flood-proof sac 200 has a top area 205. The support area 101 is concave downward to form a strip-shaped positioning groove, which extends in a strip shape between the two walls 100.

[0040] The bottom of the bottom area 202 has a positioning strip embedded in the positioning groove protruding downward, and a plurality of counterweight plates 300 are laid out in sequence on the bottom area 202 to arrange the bottom area 202 in a flat shape; the frame structure includes a backwater plate 301, a top plate 302, a frontwater plate 303 and a bottom plate 304, the top plate 302 is arranged in the top area 205, and the two ends of the top plate 302 are respectively connected to the top of the backwater plate 301 and the top of the frontwater plate 303;

[0041] The backwater plate 301 is arranged in the backwater area 203, and the bottom of the backwater plate 301 is connected to the counterweight plate 300; the frontwater plate 303 is arranged in the frontwater area 204, and the bottom of the frontwater plate 303 is connected to the counterweight plate 300. The backwater plate 301, the counterweight plate 300, the top plate 302, the frontwater plate 303 and the bottom plate 304 are surrounded to form a closed loop structure arranged in an annular manner;

[0042] Both sides of the flood-proof sac 200 are respectively provided with fastening pieces 102 that are snapped onto the wall 100 so that the flood-proof sac 200 blocks the entrance and exit; when the two fastening pieces 102 are respectively snapped onto the two walls 100, the bottom area 202 abuts against the support area 101, and multiple counterweight plates 300 are pressed against the bottom area 202. The backwater plate 301, the top plate 302, the frontwater plate 303 and the counterweight plate 300 support the flood-proof sac 200 in an upright state. When the flood-proof sac 200 is inflated to the set air pressure strength, the flood-proof sac 200 seals the entrance and exit.

[0043] The underground structure flood control device provided above is applicable to urban floods and has the following advantages:

[0044] First, in terms of sealing, the water-filled or air-filled inner cavity 201 inside the flood-proof bag 200 can fit tightly against the wall 100 of the entrance and exit after being inflated to a set air pressure strength, thereby sealing the entrance and exit to form a solid waterproof barrier, thereby providing more reliable flood-proof protection for underground structures when flood disasters occur, reducing property losses and safety hazards caused by flood intrusion.

[0045] Secondly, in terms of stability, the closed-loop structure arranged in an annular manner provides an annular support for the flood control capsule 200, so that it can be stably erected. Even under the impact and pressure of floods, it can ensure that the flood control capsule 200 is not easily deformed or overturned, thereby improving the stability of the flood control capsule 200 and providing a more durable and reliable flood control guarantee for the entrances and exits of urban underground structures.

[0046] Furthermore, in terms of installation and fixation, the positioning groove of the support area 101 and the positioning strip of the bottom area 202 cooperate with each other, so that the bottom of the flood control bag 200 can be accurately embedded and fixed on the support area 101. At the same time, multiple counterweight plates 300 are laid flat on the bottom area 202 in sequence, arranging the bottom area 202 in a flat shape. In this way, the installation process of the flood control device is more convenient and quick, and it can be quickly deployed in place in an emergency, and the flood control effect can be played in time, which improves the emergency response capability of the entrances and exits of urban underground structures to flood disasters.

[0047] Finally, in terms of the overall flood prevention effect, the fasteners 102 on both sides of the flood prevention bag 200 can be tightly fastened to the wall 100, so that the flood prevention bag 200 is blocked at the entrance and exit, forming a complete flood prevention system, which significantly improves the flood prevention performance of the entrance and exit of the urban underground structure and provides a strong guarantee for the safe and stable operation of the urban underground space.

[0048] In this embodiment, a buckling cavity 103 is provided in the buckling piece 102 , and the wall 100 is embedded in the buckling cavity 103 , so that the buckling piece 102 is fixedly connected to the wall 100 .

[0049] In this way, the fastener 102 can be tightly combined with the wall 100, thereby enhancing the fixation of the flood-proof bag 200 at the entrance and exit, preventing displacement under the impact of floods, thereby ensuring that the flood-proof bag 200 can stably block the entrance and exit, thereby improving the flood-proof performance of the flood-proof device.

[0050] In this embodiment, the fastening member 102 includes a connecting plate 104, and both sides of the connecting plate 104 are respectively connected to elastic plates 105, the inner end of the elastic plate 105 is connected to the side of the connecting plate 104, and the outer end of the elastic plate 105 is inclined away from the connecting plate 104 and extends, and the two elastic plates 105 and the connecting plate 104 enclose a fastening cavity 103;

[0051] The elastic plates 105 are arranged extending from the inside to the outside, and the elastic plates 105 are arranged obliquely toward the buckling cavity 103 . The two elastic plates 105 clamp the wall toward each other, and the buckling member 102 is fixedly connected to the wall.

[0052] By utilizing the elastic properties of the elastic plate 105, the fastener 102 can adapt to walls 100 of different thicknesses, thereby enhancing the fit and connection strength between the fastener 102 and the wall 100, further improving the stability of the flood-proof bag 200, and effectively improving the flood-proof performance of the entrances and exits of urban underground structures.

[0053] In this embodiment, the bottom of the water-facing area 204 extends outward to form a flexible pad 206 laid on the ground, and the flexible pad 206 extends outward away from the entrance and exit.

[0054] The provision of the flexible pad 206 increases the contact area between the water-facing area 204 and the ground, which can better disperse the impact force of the flood on the water-facing area 204, reduce the direct impact of the flood on the flood-proof sac 200, and extend the service life of the flood-proof sac 200. At the same time, it also improves the stability of the flood-proof sac 200 in floods, which helps to improve the flood-proof effect of the entrances and exits of urban underground structures.

[0055] In this embodiment, a plurality of flexible suction cups 207 are provided at the bottom of the flexible pad 206. The plurality of flexible suction cups 207 are adsorbed on the ground to relatively fix the flexible pad 206 on the ground.

[0056] In this way, the fixing effect of the flexible pad 206 and the ground is further enhanced, making the flexible pad 206 not easily displaced under the impact of floods, thereby ensuring the stability of the water-facing area 204, improving the impact resistance of the flood-proof bag 200 in floods, and providing a more reliable flood-proof protection for the entrances and exits of urban underground structures.

[0057] In this embodiment, a sealing strip 208 is protruded from the outer periphery of the bottom area 202, and the sealing strip 208 is closed-loop around the outer periphery of the bottom area 202; when the bottom area 202 is placed on the support area 101 and the counterweight plate 300 is pressed against the bottom area 202, the sealing strip 208 is in a compressed and deformed state.

[0058] In this way, the sealing strip 208 can effectively fill the gap between the bottom area 202 and the supporting area 101, enhance the sealing between the bottom area 202 and the supporting area 101, prevent floods from penetrating into the underground structure from the bottom, and solve the problem of floods easily penetrating from the bottom due to poor sealing of the bottom of the flood control device.

[0059] In this embodiment, the sealing strip 208 has a front section located at the front end of the bottom area 202; the front end of the counterweight plate 300 protrudes forward to form a front convex portion, and the bottom of the front convex portion is recessed upward to form a front groove, and the front section is embedded in the front groove;

[0060] The front end of the front convex portion has a front inclined surface 308 extending obliquely upward. Along the direction from bottom to top of the front convex portion, the front inclined surface 308 is arranged obliquely toward the back water area 203.

[0061] In this way, the front section and the front convex part fit closely, further enhancing the sealing of the front end of the bottom area 202. At the same time, the front inclined surface 308 can guide the flood to flow to the backwater area 203, reduce the accumulation of flood at the front end of the bottom area 202, and reduce the risk of flood infiltration.

[0062] In this embodiment, the sealing strip 208 has a rear section located at the front end of the bottom area 202; the rear end of the counterweight plate 300 protrudes backward to form a rear convex portion, and the bottom of the rear convex portion is concave upward to form a rear groove, and the rear section is embedded in the rear groove;

[0063] The rear end of the front convex portion has a rear inclined surface 309 extending obliquely upward. Along the direction from bottom to top of the rear convex portion, the rear inclined surface 309 is arranged obliquely away from the back water area 203.

[0064] Through the cooperation between the rear section and the rear convex portion, the sealing of the rear end of the bottom area 202 is further enhanced, and the setting of the rear inclined surface 309 can prevent flood water from accumulating at the rear end of the bottom area 202, guide the flood water to be discharged smoothly, reduce the possibility of flood water infiltrating into the underground structure, and provide more complete flood prevention protection for the entrances and exits of urban underground structures.

[0065] In this embodiment, along the top-down direction of the flood-proof sac 200, the water-facing area 204 is arranged obliquely away from the water-receiving area 203, and the water-facing plate 303 is arranged obliquely in the same direction as the water-facing area 204; an adjustment ring 305 is provided in the middle of the closed-loop structure, and the top plate 302, the water-receiving plate 301, the water-facing plate 303 and the bottom plate 304 are respectively hinged with adjustment rods 306, and the multiple adjustment rods 306 are respectively hinged to the outer periphery of the adjustment ring 305, and the multiple adjustment rods 306 are arranged around the circumference of the adjustment ring 305 at intervals.

[0066] The inclined water-facing area 204 and the water-facing plate 303 can better adapt to the impact direction of the flood and disperse the impact force of the flood more effectively. At the same time, the adjustment ring 305 and the adjustment rod 306 can automatically adjust the shape and angle of the frame structure according to the pressure and flow of the flood, thereby ensuring the stability and sealing of the flood-proof bag 200 under different flood conditions, and effectively improving the flood-proof performance of the entrances and exits of urban underground structures.

[0067] In this embodiment, adjacent adjustment circles 305 are respectively connected to multiple inflatable strips 307, which are arranged at circumferential intervals along the adjustment circle 305. The inflatable strips 307 are connected to the interior of the flood-proof bladder 200. When the interior of the flood-proof bladder 200 is inflated, the interior of the inflatable strips 307 is inflated synchronously.

[0068] In this way, the inflatable strip 307 can provide additional supporting force when the flood-proof bag 200 is inflated, thereby enhancing the overall rigidity and stability of the flood-proof bag 200, making it less likely to be deformed or damaged under the impact of floods. At the same time, the elastic characteristics of the inflatable strip 307 can also buffer the impact of floods, reduce the impact force on underground structures, and further improve the flood-proof effect of the entrances and exits of urban underground structures.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements 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 structure flood prevention device suitable for urban floods, characterized in that: The entrance and exit arranged in the underground structure includes a material cavity for storing materials, a flood-proof capsule that can be rolled up and stored in the material cavity and can be inflated or deflated, a plurality of frame structures placed inside the flood-proof capsule and supporting the shape of the flood-proof capsule, and a plurality of counterweight plates; oppositely arranged walls are formed on both sides of the entrance and exit, a support area is formed at the bottom of the entrance and exit, and the support area is formed between the two walls; the plurality of frame structures are respectively arranged corresponding to the plurality of counterweight plates; The interior of the flood-proof sac has an inner cavity that can be filled with water or air, the bottom of the flood-proof sac has a bottom area that abuts against the support area, the back of the flood-proof sac has a backwater area, the front of the flood-proof sac has a frontwater area, and the top of the flood-proof sac has a top area; the support area is concave downward to form a positioning groove arranged in a strip shape, and the positioning groove extends in a strip shape between the two walls; The bottom of the bottom area protrudes downward with a positioning strip embedded in the positioning groove, and a plurality of the counterweight plates are laid flat on the bottom area in sequence, so that the bottom area is arranged in a flat shape; the frame structure includes a backwater plate, a top plate, a frontwater plate and a bottom plate, the top plate is arranged in the top area, and the two ends of the top plate are respectively connected to the top of the backwater plate and the top of the frontwater plate; The backwater plate is arranged in the backwater area, and the bottom of the backwater plate is butted against the counterweight plate; the frontwater plate is arranged in the frontwater area, and the bottom of the frontwater plate is butted against the counterweight plate, and the backwater plate, the counterweight plate, the top plate, the frontwater plate and the bottom plate are enclosed to form a closed loop structure arranged in an annular manner; Both sides of the flood-proof sac are respectively provided with fastening parts that snap onto the wall to seal the flood-proof sac at the entrance and exit; when the two fastening parts are respectively snapped onto the two walls, the bottom area abuts against the support area, and the multiple counterweight plates are pressed against the bottom area. The back water plate, top plate, front water plate and counterweight plate support the flood-proof sac in an upright state. When the flood-proof sac is inflated to the set air pressure strength, the flood-proof sac will seal the entrance and exit.

2. The underground structure flood prevention device suitable for urban floods as claimed in claim 1, characterized in that: The buckle piece is provided with a buckle cavity, and the wall is embedded in the buckle cavity so that the buckle piece is fixedly connected to the wall.

3. The underground structure flood prevention device suitable for urban floods as claimed in claim 2, characterized in that: The buckle member comprises a connecting plate, the two sides of the connecting plate are respectively connected to the elastic plates, the inner ends of the elastic plates are connected to the side edges of the connecting plates, the outer ends of the elastic plates extend obliquely away from the connecting plates, and the two elastic plates and the connecting plates enclose the buckle cavity; The elastic plate is arranged extending from the inside to the outside, and the elastic plate is arranged obliquely toward the buckling cavity. The two elastic plates clamp the wall toward each other to fix the buckling piece to the wall.

4. The underground structure flood prevention device suitable for urban floods as claimed in claim 1, characterized in that: The bottom of the water-facing area extends outward to form a flexible pad laid on the ground, and the flexible pad extends outward away from the entrance and exit.

5. The underground structure flood prevention device suitable for urban floods as claimed in claim 4, characterized in that: A plurality of flexible suction cups are arranged at the bottom of the flexible pad, and the plurality of flexible suction cups are adsorbed on the ground to relatively fix the flexible pad on the ground.

6. The underground structure flood prevention device suitable for urban floods according to any one of claims 1 to 5, characterized in that: A sealing strip is protruded from the periphery of the bottom area, and the sealing strip is surrounded in a closed loop along the periphery of the bottom area; when the bottom area is placed on the supporting area and the counterweight plate is pressed against the bottom area, the sealing strip is in a compressed and deformed state.

7. The underground structure flood prevention device suitable for urban floods as claimed in claim 6, characterized in that: The sealing strip has a front section located at the front end of the bottom area; the front end of the counterweight plate protrudes forward to form a front convex portion, the bottom of the front convex portion is recessed upward to form a front groove, and the front section is embedded in the front groove; The front end of the front convex portion has a front inclined surface extending obliquely upward, and along the direction from bottom to top of the front convex portion, the front inclined surface is arranged obliquely toward the back water area.

8. The underground structure flood prevention device suitable for urban floods as claimed in claim 7, characterized in that: The sealing strip has a rear section located at the front end of the bottom area; the rear end of the counterweight plate protrudes backward to form a rear convex portion, the bottom of the rear convex portion is concave upward to form a rear groove, and the rear section is embedded in the rear groove; The rear end of the front convex portion has a rear inclined surface extending obliquely upward, and along the direction from bottom to top of the rear convex portion, the rear inclined surface is arranged obliquely away from the back water area.

9. The underground structure flood prevention device suitable for urban floods as claimed in any one of claims 1 to 5, characterized in that: Along the direction from top to bottom of the flood-proof sac, the water-facing area is inclined away from the water-receiving area, and the water-facing plate is inclined in the same direction as the water-facing area; an adjustment ring is provided in the middle of the closed-loop structure, and the top plate, the water-receiving plate, the water-facing plate and the bottom plate are respectively hinged with adjustment rods, and the multiple adjustment rods are respectively hinged to the outer periphery of the adjustment ring, and the multiple adjustment rods are arranged around the circumference of the adjustment ring at intervals.

10. The underground structure flood prevention device suitable for urban floods as claimed in claim 9, characterized in that: Adjacent adjustment rings are respectively connected with a plurality of inflatable strips, which are arranged around the circumference of the adjustment ring at intervals. The inflatable strips are connected with the interior of the flood-proof bladder. When the interior of the flood-proof bladder is inflated, the interior of the inflatable strips is inflated synchronously.

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