A water barrier for an entrance to an underground space

Abstract

The present application relates to a kind of underground space entrance water baffle, for underground space entrance rainwater is prevented into the device of irrigation. Mainly by baffle, clamping groove, bracing bar is composed, baffle is by first baffle and second baffle, first baffle is hinged with second baffle, second baffle can rotate and first baffle fold or unfold. First baffle is hinged in the top of clamping groove by horizontal axis and vertical axis, first baffle, second baffle unfolds, baffle and inlet side wall, ground and baffle folding butt joint are all provided with three ethylene-propylene rubber sealing strip, prevent water seepage, constitute the barrier of blocking water backflow. First baffle and second baffle fold by removing bracing bar, turn over around horizontal axis upwards, again around vertical axis rotation baffle is attached on the inlet side wall and forms storage state. Baffle is stored in folding suspension mode, it is convenient to install when using in emergency. Baffle and bracing bar and accessory are inseparable, accessory cannot be lost. Water baffle is easy to install, solid and stable.

Description

Technical Field

[0001] This invention relates to a water-blocking baffle at the entrance of an underground space, to underground space engineering, and particularly to a device for preventing rainwater from entering at the entrance of an underground space. Background Technology

[0002] Underground space refers to spaces below the earth's surface that are used for various purposes, whether through artificial development or natural formation. These spaces include underground transportation spaces such as underpasses, subways, and tunnels; municipal facility spaces such as underground pipelines and integrated utility tunnels; and architectural spaces such as underground commercial facilities, parking garages, and civil defense facilities. With the rapid pace of urban construction in my country, the utilization of underground space has developed rapidly. Underground spaces are accessed through entrances. During the summer rainy season, the risk of rainwater backflow into urban underground spaces such as underground pedestrian underpasses, underground parking garages, subway stations, and high-speed rail stations increases. Urban drainage systems are designed based on a certain return period to calculate the intensity of rainstorms. Under normal rainfall, the drainage system can meet drainage requirements. However, when rainstorms exceed the design return period, surface water accumulation may occur, and in cases of extreme rainstorms, urban flooding may occur. To prevent rainwater backflow into underground spaces such as underpasses, underground shopping malls, and subways, the entrances are generally raised several steps above ground level to prevent surface water from entering the underground space. However, in the event of heavy rainstorms, water may overflow the steps and flow into the underground space.

[0003] To prevent surface water from entering the underground space through the entrance, the current technology involves installing channel steel on both sides of the entrance, embedding a wooden board within the channel steel as a water-blocking baffle, and then stacking sandbags behind the baffle to increase its strength and reduce water inflow through gaps. This method is simple and commonly used. However, this method also has drawbacks. The entrance is generally wide, and the wooden baffle is thick and heavy, making installation inconvenient. Storage is also difficult when not in use. Another method involves dividing the water-blocking baffle into two sections, requiring splicing during installation and disassembling and placing them near the entrance or storing them in the management room when not in use. In the event of a flood, there are problems such as difficulty finding tools, the possibility of lost screws and accessories, and the time-consuming installation of support columns. Summary of the Invention

[0004] The purpose of this invention is to provide a water-blocking baffle for the entrance of an underground space, mainly composed of a baffle, a slot, and a support rod. The baffle consists of a first baffle and a second baffle, which are hinged together. The second baffle can rotate and fold or unfold with the first baffle. The first baffle is hinged to the top of the slot via a horizontal and a vertical axis. When the first and second baffles are unfolded, the slot and the support rod support the first and second baffles. The first baffle is sealed with a water-stopping strip within the slot, and the two butt joints of the left and right water-blocking baffles are also sealed with water-stopping strips, forming a barrier to prevent backflow of accumulated water. The support rod can be removed, the first and second baffles can be folded, rotated upwards around the horizontal axis, and then rotated around the vertical axis to adhere to the entrance side wall. Brackets and clamps are used to secure it, forming a retracted state.

[0005] The present invention is achieved through the following technology: the water-blocking baffle includes two sets, left and right, mainly composed of baffle 1, slot 2, and support rod 3. The baffle 1 is composed of a first baffle 4 and a second baffle 5. One end of the first baffle 4 and one end of the second baffle 5 are hinged together by a folding shaft 6. The second baffle 5 can rotate around the folding shaft 6 and fold or unfold with the first baffle 4.

[0006] The other end of the first baffle 4 is connected to the slot 2 via a horizontal axis 7 and a vertical axis 8. The vertical axis 8 is vertically hinged to the middle of the horizontal axis 7, and both ends of the horizontal axis 7 are hinged to the top of the slot 2. The vertical axis 8 is installed on the top edge of the first baffle 4. After the second baffle 5 and the first baffle 4 are folded, they can be flipped upward around the horizontal axis 7 to the entrance side wall 9. The first baffle 4 can be rotated around the vertical axis 8 and hung flat on the entrance side wall 9, forming the folded storage state of the baffle 1.

[0007] When the baffle 1 is folded and stored, the first baffle 4 rotates around the vertical axis 8 until it is perpendicular to the entrance side wall 9, and then flips downward around the horizontal axis 7. The end of the first baffle 4 is embedded in the slot 2, and the second baffle 5 is unfolded. The lower end of the folding shaft 6 is threaded, and a ground nut 10 is provided on the entrance ground corresponding to the folding shaft 6. The thread of the folding shaft 6 is screwed into the ground nut 10. The top end of the folding shaft 6 is connected to the support rod 3. The other end of the support rod 3 is provided with a support foot 11. The lower end of the support foot 11 is threaded, and a ground nut 10 is provided on the entrance ground corresponding to the thread of the support foot 11. The thread of the support foot 11 is screwed into the ground nut 10. The support rod 3 provides support for the folding shaft 6. A column 12 is provided at the end near the other end of the second baffle 5. The lower end of the column 12 is threaded. A ground nut 10 is provided at the inlet ground corresponding to the column 12. The thread of the column 12 is screwed into the ground nut 10. The top of the column 12 is connected to the support rod 3. The support foot 11 of the support rod 3 is bolted into the ground nut 10. The support rod 3 supports the column 12 and forms an unfolded water-blocking state.

[0008] The two sets of baffles 1 at the entrance of the underground space are connected and, with the fastening of the slots 2 and the support of the struts 3, form a stable, sealed and waterproof water-blocking baffle at the entrance of the underground space.

[0009] The slot 2 is in the shape of "┏┓" and is made of aluminum alloy profile. It is fixed to the entrance side wall 9 with stainless steel expansion bolts. The two side edges of the slot 2 are provided with slot sealing strips 13. When the water blocking state is unfolded, the end of the first baffle 4 is embedded in the slot 2 and squeezes the slot sealing strips 13 to seal and waterproof.

[0010] A hinge 14 is provided at the connection between the first baffle 4 and the second baffle 5. The folding shaft 6 passes through the hinge 14 to form a hinge. The folding shaft 6 can rotate in the hinge. A hinge joint sealing strip 15 is provided at the hinge joint of the first baffle 4 and the second baffle 5. When the baffle is unfolded to block water, the two hinge joint sealing strips 15 are squeezed together to seal and waterproof.

[0011] A clamp 16 is provided at the connection between the column 12 and the second baffle 5, and the column 12 can rotate by inserting itself into the clamp 16.

[0012] The two sets of baffles 1 are provided with a joint sealing strip 17 at the joint of the second baffle 5. When the baffle is unfolded to block water, the two joint sealing strips 17 are squeezed together to seal and waterproof.

[0013] The bottom of the first baffle 4 and the second baffle 5 are provided with a bottom sealing strip 18. When the folding shaft 6 and the column 12 are screwed into the ground nut 10, the bottom sealing strip 18 of the first baffle 4 and the second baffle 5 are squeezed tightly with the inlet ground to seal and waterproof.

[0014] The groove sealing strip (13), hinge joint sealing strip (15), butt joint sealing strip (17), and bottom sealing strip (18) are made of EPDM rubber.

[0015] The top of the folding shaft 6 and the column 12 are provided with a handle 19 for rotating and fixing the folding shaft 6 and the column 12.

[0016] The lower part of the handle 19 is provided with a strut connector 20. The strut 3 is connected to the folding shaft 6 and the column 12 through the strut connector 20. The strut connector 20 can rotate around the folding shaft 6 and the column 12. The strut 3 can rotate around the strut connector 20. The handle 19 presses the strut connector 20 against the top of the baffle 1.

[0017] The entrance side wall 9 is provided with a bracket 21 and a clamp 22. When the baffle 1 is folded and stored, one side of the lower part is connected to the longitudinal axis 8, and the other side is supported on the bracket 21. The clamp 22 on the upper part of the folded baffle 1 tightens it.

[0018] This invention is used to prevent surface water from flooding underground spaces during heavy rain. Its advantages include: the baffles are stored in a folding, hanging manner, making installation convenient for emergency use; two sets of baffles can be unfolded and joined together for installation, accommodating wide entrances. The baffles, support rods, and accessories are inseparable, preventing loss of parts. The built-in handle eliminates the need for a separate wrench during installation, making installation simple, sturdy, and stable. All joints use EPDM rubber sealing strips, providing excellent water-stopping properties. Attached Figure Description

[0019] Figure 1 Plan view of the spatial entrance of this invention; Figure 2 Front elevation view of the spatial entrance of this invention; Figure 3 Side elevation view of the spatial entrance of this invention; Figure 4 This is a diagram showing the baffle in its folded and stowed state. Figure 5 A schematic diagram showing the baffle in its unfolded, water-blocking state; Figure 6 This is a schematic diagram of the baffle folding and suspension. Figure 7 This is a partial schematic diagram of the connection between the baffle and the slot; Figure 8 A partial schematic diagram of the folding axis where the baffle unfolds; Figure 9 This is a partial schematic diagram of the joint where the baffle unfolds; Figure 10 This is a cross-sectional view of the folding shaft support location.

[0020] In the diagram: 1-baffle, 2-slot, 3-support rod, 4-first baffle, 5-second baffle, 6-folding shaft, 7-horizontal shaft, 8-vertical shaft, 9-entrance side wall, 10-ground nut, 11-support foot, 12-column, 13-slot sealing strip, 14-hinge, 15-hinge joint sealing strip, 16-clamp, 17-butt joint sealing strip, 18-bottom sealing strip, 19-handle, 20-support rod connector, 21-bracket, 22-clamp, 23-lock. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, in conjunction with Figures 1-10 To further illustrate this application, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., used in this description indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or parts referred to must have a specific orientation, or be constructed and operated in a specific orientation. The content mentioned in the embodiments is not intended to limit the present invention.

[0022] The underground space entrance water-blocking baffle of the present invention is installed at the entrance of the underground space, as shown in the plan view. Figure 1 See front elevation drawing Figure 2 See side elevation view Figure 3 To prevent water accumulation on the ground, the entrance to the space is typically designed with 3-5 steps, raised a certain height above the ground. The water-blocking baffle consists of two sets, left and right, installed between the two side walls of the entrance platform above the steps. The water-blocking baffle mainly comprises a baffle 1, a slot 2, and a support rod 3. Baffle 1 is composed of a first baffle 4 and a second baffle 5. The two sets of baffles 1 at the underground space entrance are joined together, and with the slot 2 securing them and the support rod 3 providing support, they form a stable, sealed, and waterproof water-blocking baffle for the underground space entrance. Figure 1 , Figure 3 The arrow points towards the water. Figure 2 This is the backwater side. When not in use, the water-blocking baffle can be folded and stored, hanging on the inlet side wall 9. See the diagram for a diagram showing the baffle in its folded / stored state. Figure 4 See the schematic diagram of the baffle folding suspension. Figure 6 When water-blocking barriers need to be installed during heavy rain, they should be deployed and supported at the inlet. See the diagram for a schematic of the barrier's deployed water-blocking state. Figure 5 .

[0023] A hinge 14 is provided at the connection between the first baffle 4 and the second baffle 5. A folding shaft 6 passes through the hinge 14 to form a hinge. The folding shaft 6 can rotate within the hinge. One end of the first baffle 4 and one end of the second baffle 5 are hinged together by the folding shaft 6. The second baffle 5 can rotate around the folding shaft 6 and fold or unfold with the first baffle 4. The other end of the first baffle 4 is connected to the slot 2 by a horizontal shaft 7 and a vertical shaft 8. The vertical shaft 8 is vertically hinged to the middle of the horizontal shaft 7. The horizontal shaft 7 and the vertical shaft 8 form a universal connector. The two ends of the horizontal shaft 7 are hinged to the top of the slot 2, and the vertical shaft 8 is installed on the top edge of the first baffle 4. Figure 7 The folded first baffle 4 and second baffle 5 can be rotated 90° upwards around the horizontal axis 7 to the entrance side wall 9. At this time, the folded surfaces of the first baffle 4 and second baffle 5 are perpendicular to the entrance side wall 9. Then, the first baffle 4 is rotated 90° around the vertical axis 8, and the first baffle 4 is hung flat on the entrance side wall 9, forming the folded storage state of the baffle 1. See Figure 4 See the schematic diagram of the baffle folding suspension. Figure 6 The top surfaces of the first baffle 4 and the second baffle 5 are equipped with latches 23. When the first baffle 4 and the second baffle 5 are folded, the support rod 3 is also folded up and locked onto the first baffle 4 and the second baffle 5. The latches 23 lock and fix the support rod 3. The entrance side wall 9 is equipped with a bracket 21 and a clamp 22. When the baffle 1 is folded and stored, one side of the lower part is connected to the longitudinal axis 8, and the other side is supported on the bracket 21. The clamp 22 on the upper part of the folded baffle 1 tightens it. See Figure 6 .

[0024] When the baffle 1 is folded and stored, the first baffle 4 rotates 90° around the vertical axis 8 until it is perpendicular to the entrance side wall 9, and then rotates 90° downwards around the horizontal axis 7. The end of the first baffle 4 is embedded in the slot 2. The second baffle 5 is unfolded. The lower end of the folding shaft 6 is threaded, and a ground nut 10 is provided on the entrance ground corresponding to the folding shaft 6. The thread of the folding shaft 6 is screwed into the ground nut 10. The top end of the folding shaft 6 is connected to the support rod 3 through the support rod connector 20. The other end of the support rod 3 is provided with a support foot 11. The lower end of the support foot 11 is threaded, and a ground nut 10 is provided on the entrance ground corresponding to the thread of the support foot 11. The thread of the support foot 11 is screwed into the ground nut 10. The support rod 3 provides support for the folding shaft 6. See Figure 8 A column 12 is provided at the end near the other end of the second baffle 5. A clamp 16 is provided at the connection between the column 12 and the second baffle 5, allowing the column 12 to rotate by inserting into the clamp 16. The lower end of the column 12 is threaded, and a ground nut 10 is provided at the entrance ground corresponding to the column 12. The thread of the column 12 is screwed into the ground nut 10. The top of the column 12 is connected to the support rod 3 via a support rod connector 20. The support foot 11 of the support rod 3 is bolted into the ground nut 10, and the support rod 3 provides support for the column 12. The second baffles 5 of the two sets of baffles 1 at the entrance are connected together, see... Figure 9 .

[0025] The inner sides of the two side edges of the slot 2 are provided with slot sealing strips 13. In the unfolded water-blocking state, the end of the first baffle 4 is embedded in the slot 2, squeezing the slot sealing strips 13 to seal and waterproof. Figure 6 , Figure 7 The hinge joint of the first baffle 4 and the second baffle 5 is provided with a hinge joint sealing strip 15. When the baffle is in the unfolded water-blocking state, the two hinge joint sealing strips 15 are squeezed together to seal and waterproof the area. Figure 8 Two sets of baffles 1 are installed at the entrance of the space. A joint sealing strip 17 is installed at the joint of the second baffle 5 of the two sets of baffles 1. When the baffles are in the water-blocking state, the two joint sealing strips 17 are squeezed together to seal and waterproof the space. (See...) Figure 9 The bottom of the first baffle 4 and the second baffle 5 are provided with bottom sealing strips 18. When the folding shaft 6 and the column 12 are screwed into the ground nut 10, the bottom sealing strips 18 of the first baffle 4 and the second baffle 5 are squeezed tightly against the inlet ground to seal and waterproof. Figure 5 , Figure 7 , Figure 8 , Figure 9 The sealing strip is made of ethylene propylene diene monomer (EPDM) rubber, which has ozone resistance, heat resistance, weather resistance, good low-temperature flexibility, and good water-stopping effect.

[0026] The height of baffle 1 is set according to the water-blocking requirements, generally 600~1000mm is appropriate. Baffle 1 is made of aluminum alloy profile, which has a hollow structure to reduce weight. The profile thickness is 50~80mm and the width is 100~200mm. It is spliced ​​according to the height of baffle 1 using gas shielded welding. The first baffle 4 and the second baffle 5 are profiles of the required length calculated according to the width of the space entrance. The ends of the cut profiles are sealed with aluminum alloy plates to prevent water from entering the hollow part of the profile. Hinges 14 are installed at the hinge position of the first baffle 4 and the second baffle 5. The center of the folding shaft 6 should be on the inner edge of the folded first baffle 4 and the second baffle 5. However, considering manufacturing and installation errors, the center of hinge 14 is moved outward by 3~5mm. There is a certain gap after the first baffle 4 and the second baffle 5 are folded, so that the baffle 1 will not be unable to close tightly.

[0027] The slot 2 is shaped like a "┏┓" and made of aluminum alloy profile. The height of the slot 2 is based on the height of the baffle 1, taking into account the thickness of the bottom sealing strip 18 of the baffle 1 and the installation height of the horizontal axis 7 and the vertical axis 8. The slot 2 is provided with mounting holes and is fixed to the entrance side wall 9 with stainless steel expansion bolts. After the slot 2 is installed, sealant is applied to the gap between it and the entrance side wall 9 to prevent water seepage between the slot 2 and the entrance side wall 9.

[0028] All components of this invention are integrated into a single, non-removable unit, preventing component loss. A handle 19 is provided at the top of the folding shaft 6 and the column 12 for rotating and fixing them. The handle 19 can be rotated 180°. If rotating the handle 19 becomes awkward at a certain position, the handle can be rotated 180° to the other side to accommodate different operating positions. A retaining ring is provided at the bottom of the first baffle 4 and the second baffle 5 at the lower end of the folding shaft 6 and the column 12 to restrict their vertical movement. The folding shaft 6 and the column 12 can only rotate, not be pulled out, when the handle 19 is moved. A support rod connector 20 is provided at the lower part of the handle 19. The support rod 3 is connected to the folding shaft 6 or the column 12 via the support rod connector 20. The support rod connector 20 can rotate around the folding shaft 6 or the column 12, and the support rod 3 can rotate around the support rod connector 20. The handle 19 presses the support rod connector 20 against the top of the baffle 1. The support rod 3 is hinged to the support leg 11, so that the bottom surface of the support leg 11 is in close contact with the ground nut 10. The ground nut 10 is installed in a covered box, which is buried underground. When the box is closed, it is flush with the ground so as not to obstruct pedestrian passage. The box is opened when the water-blocking baffle is installed. See the cross-sectional view at the folding shaft 6. Figure 10 For reference, see column 12. The strut 3, folding shaft 6, column 12, support foot 11, handle 19, and strut connector 20 are made of stainless steel.

[0029] The lengths of the first baffle 4 and the second baffle 5 are not the same. When manufacturing the first baffle 4 and the second baffle 5 of the baffle 1, the embedding depth of the first baffle 4 in the slot 2 and the wall thickness of the slot 2 should be considered. There should be a gap of about 10mm between the end of the first baffle 4 and the slot 2. The first baffle 4 should be embedded in the slot 2 for 40-60mm. When the first baffle 4 and the second baffle 5 are folded, the first baffle 4 is embedded in the slot 2, and the second baffle 5 leaves a gap of 30-50mm between itself and the outer edge of the slot 2. A hinge joint sealing strip 15 is provided at the hinged end of the first baffle 4 and the second baffle 5. Each hinge joint sealing strip 15 is about 10mm after compression. When the first baffle 4 and the second baffle 5 are unfolded, the compression gap between the two hinge joint sealing strips 15 is about 20mm. A joint sealing strip 17 is provided at the joint of the second baffles 5 of the two sets of baffles 1. Each joint sealing strip 17 is about 10mm after compression, and the compression gap between the two second baffles 5 is about 20mm. Based on the above principles, the lengths of the first baffle 4 and the second baffle 5 are calculated according to the width of the underground space entrance, and the thickness of the profile end cap plate needs to be subtracted.

[0030] Set the ground nuts 10 according to the position of the folding shaft 6 or the column 12 on the prefabricated baffle 1 and the position of the corresponding support leg 11.

[0031] Install one end of the first baffle 4 of the prepared baffle 1 into the slot 2, and install the bracket 21 and clamp 22 on the entrance side wall 9. Fold the baffle 1 and hang it on the entrance side wall 9 for later use.

[0032] The specification and drawings of this application are merely one specific embodiment and are not restrictive. Those skilled in the art can make many other modifications based on the teachings of this application without departing from the spirit and scope of this application, and all such modifications are within the scope of protection of this application.

Claims

1. A water-blocking baffle at the entrance of an underground space, characterized in that: The water-blocking baffle includes two sets, left and right, consisting of a baffle (1), a slot (2), and a support rod (3). The baffle (1) consists of a first baffle (4) and a second baffle (5). One end of the first baffle (4) and one end of the second baffle (5) are hinged together by a folding shaft (6). The second baffle (5) can rotate around the folding shaft (6) and fold or unfold with the first baffle (4). The other end of the first baffle (4) is connected to the slot (2) by a horizontal axis (7) and a vertical axis (8). The vertical axis (8) is vertically hinged to the middle of the horizontal axis (7). The horizontal axis (7) and the vertical axis (8) form a universal connector. The two ends of the horizontal axis (7) are hinged to the top of the slot (2), and the vertical axis (8) is installed on the top edge of the first baffle (4). After the second baffle (5) and the first baffle (4) are folded, they can be flipped upward around the horizontal axis (7) to the entrance side wall (9). The first baffle (4) can be rotated around the vertical axis (8) and hung flat on the entrance side wall (9) to form the folded storage state of the baffle (1). In the folded storage state of the baffle (1), the first baffle (4) rotates around the longitudinal axis (8) until it is perpendicular to the entrance side wall (9), and then flips downward around the transverse axis (7). The end of the first baffle (4) is embedded in the slot (2), and the second baffle (5) is unfolded. The lower end of the folding shaft (6) is threaded, and a ground nut (10) is provided on the entrance ground corresponding to the folding shaft (6). The thread of the folding shaft (6) is screwed into the ground nut (10). The top end of the folding shaft (6) is connected to the support rod (3), and the other end of the support rod (3) is provided with a support foot (11). The lower end of the support foot (11) is threaded, and the thread of the support foot (11) is threaded. A ground nut (10) is provided at the entrance ground, and the support foot (11) is screwed into the ground nut (10). The support rod (3) provides support for the folding shaft (6). A column (12) is provided at the end near the other end of the second baffle (5). The lower end of the column (12) is threaded. A ground nut (10) is provided at the entrance ground corresponding to the column (12). The thread of the column (12) is screwed into the ground nut (10). The top of the column (12) is connected to the support rod (3). The support foot (11) of the support rod (3) is bolted into the ground nut (10). The support rod (3) provides support for the column (12) and forms an unfolded water-blocking state. The two sets of baffles (1) at the entrance of the underground space are connected. With the fastening of the slot (2) and the support of the strut (3), they form a stable, sealed and waterproof baffle for the entrance of the underground space. The slot (2) is in the shape of "┏┓" and is made of aluminum alloy profile. It is fixed to the entrance side wall (9) with stainless steel expansion bolts. The two sides of the slot (2) are provided with slot sealing strips (13). When the water blocking state is unfolded, the end of the first baffle (4) is embedded in the slot (2) and squeezes the slot sealing strips (13) to seal and waterproof. A hinge (14) is provided at the connection between the first baffle (4) and the second baffle (5). The folding shaft (6) passes through the hinge (14) to form a hinge. The folding shaft (6) can rotate in the hinge. A hinge joint sealing strip (15) is provided at the hinge of the first baffle (4) and the second baffle (5). When the water-blocking state is unfolded, the two hinge joint sealing strips (15) are squeezed together to seal and waterproof. A clamp (16) is provided at the connection between the column (12) and the second baffle (5), and the column (12) can rotate by passing through the clamp (16); The two sets of baffles (1) are provided with a joint sealing strip (17) at the joint of the second baffle (5). When the baffle is in the water-blocking state, the two joint sealing strips (17) are squeezed together to seal and waterproof.

2. The water-blocking baffle at the entrance of the underground space according to claim 1, characterized in that: The bottom of the first baffle (4) and the second baffle (5) are provided with a bottom sealing strip (18). When the first baffle (4) and the second baffle (5) are screwed into the ground nut (10) by the folding shaft (6) and the column (12), the bottom sealing strip (18) is squeezed tightly with the inlet ground to seal and waterproof.

3. The water-blocking baffle at the entrance of the underground space according to claim 2, characterized in that: The groove sealing strip (13), hinge joint sealing strip (15), butt joint sealing strip (17), and bottom sealing strip (18) are made of EPDM rubber.

4. The water-blocking baffle at the entrance of the underground space according to claim 1, characterized in that: The top of the folding shaft (6) and the column (12) are provided with a handle (19) for rotating and fixing the folding shaft (6) and the column (12).

5. The water-blocking baffle at the entrance of the underground space according to claim 4, characterized in that: The lower part of the handle (19) is provided with a strut connector (20). The strut (3) is connected to the folding shaft (6) and the column (12) through the strut connector (20). The strut connector (20) can rotate around the folding shaft (6) and the column (12). The strut (3) can rotate around the strut connector (20). The handle (19) presses the strut connector (20) against the top of the baffle (1).

6. The water-blocking baffle at the entrance of the underground space according to claim 1, characterized in that: The entrance side wall (9) is provided with a bracket (21) and a clamp (22). When the baffle (1) is folded and stored, one side of the lower part is connected to the longitudinal axis (8), and the other side is supported on the bracket (21). The clamp (22) on the upper part of the folded baffle (1) tightens it.

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