Underground space inlet water blocking baffle

Abstract

The invention relates to a water blocking baffle for an underground space entrance, which is a device for preventing rainwater from being injected into the underground space entrance. The device is mainly composed of baffles, clamping grooves and supporting rods, the baffles are composed of a first baffle and a second baffle, the first baffle is hinged to the second baffle, and the second baffle can rotate to be folded or unfolded with the first baffle. The first baffle is hinged to the top of the clamping groove through the transverse shaft and the longitudinal shaft, the first baffle and the second baffle are unfolded, and ethylene propylene diene monomer sealing strips are arranged at the folding butt-joint positions of the baffles, the inlet side wall, the ground and the baffles to prevent accumulated water from permeating and form a barrier for preventing the accumulated water from flowing backwards. When the supporting rod is detached, the first baffle and the second baffle are folded, turned upwards around the transverse shaft and then rotated around the longitudinal shaft to be attached to the side wall of the entrance to form a storage state. The baffles are stored in a folding and hanging mode, and installation is convenient during emergency use. The baffle, the supporting rod and the accessories cannot be separated, and the accessories cannot be lost. The water blocking baffle is easy to install, firm and stable.

Description

Technical Field

[0001] The invention relates to a water-blocking baffle plate at an underground space entrance, to an underground space project, and in particular to a device used for preventing rainwater from entering an underground space entrance. Background Art

[0002] Underground space refers to the space for various purposes that is artificially developed or naturally formed below the ground surface. These spaces include underground transportation spaces such as underpasses, subways, and tunnels, municipal facilities such as underground pipelines and integrated pipe corridors, and building spaces such as underground commercial facilities, parking garages, and civil air defense facilities. With the continuous acceleration of urban construction in my country, the utilization of underground space has gradually developed rapidly. Underground space is entered through an entrance. In the summer rainstorm season, the risk of rainwater backflow in urban underground spaces such as underground crossings, underground garages, subway stations, and high-speed rail stations increases. The urban drainage system is designed based on a certain recurrence period to calculate the intensity of rainstorms. The drainage system can meet the drainage requirements during normal rainfall. When there is a rainstorm that exceeds the design recurrence period, it is possible to cause ground water accumulation. In extremely heavy rainstorms, urban waterlogging may occur. In order to prevent the entrance of underground spaces such as underpasses, underground shopping malls, and subways from backflowing into the underground space, the entrance is generally several steps above the ground to prevent ground water from pouring into the underground space through the entrance. When encountering heavy rainstorms, it is also possible that the accumulated water overflows the steps and flows into the underground space.

[0003] In order to prevent ground water from flowing into the underground space through the entrance, the existing technology is to install channel steel on both side walls at the entrance of the space, embed a wooden board in the channel steel as a water-blocking baffle, and then stack sandbags on the back of the baffle to increase the strength of the baffle and reduce the inflow of water from the gap. This method is simple and is a commonly used method in the existing technology. However, this method also has defects. Generally, the entrance of the channel is wide, the thickness of the wooden baffle is thick, and the weight is large, which is very inconvenient to install. It is also inconvenient to store the baffle when not in use. There is also a method that divides the water-blocking baffle into two sections, which need to be spliced ​​during installation. When not in use, it is disassembled and placed next to the entrance, or stored in the management room. In the event of a flood, there are problems such as being unable to find tools, the possibility of losing screw accessories, and the time-consuming installation of columns. Summary of the invention

[0004] The purpose of the present invention is to provide a water-blocking baffle at the entrance of an underground space, which is mainly composed of a baffle, a slot, and a support rod. The baffle is composed of a first baffle and a second baffle. The first baffle is hinged to the second baffle, and the second baffle can be rotated to fold or unfold with the first baffle. The first baffle is hinged to the top of the slot through a horizontal axis and a vertical axis. The first baffle and the second baffle are unfolded. The slot and the support rod support the first baffle and the second baffle. The first baffle is embedded in the slot with a sealing strip to stop water. The left and right water-blocking baffles have two butt joints with sealing strips to stop water, forming a barrier to prevent the backflow of accumulated water. Remove the support rod, fold the first baffle and the second baffle, flip upward around the horizontal axis, and then rotate the baffle around the vertical axis to stick to the side wall of the entrance. Use a bracket and a clamp to tighten it to form a storage state.

[0005] The present invention is realized by the following technology: the water-blocking baffle comprises two left and right groups, which are mainly composed of a baffle 1, a slot 2, and a support rod 3; the baffle 1 comprises 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 axis 6; the second baffle 5 can rotate around the folding axis 6 and be folded or unfolded with the first baffle 4.

[0006] The other end of the first baffle 4 is connected to the card slot 2 by a transverse axis 7 and a longitudinal axis 8, the longitudinal axis 8 is vertically hingedly installed at the middle of the transverse axis 7, the two ends of the transverse axis 7 are hingedly installed at the top of the card slot 2, and the longitudinal axis 8 is installed at the top edge of the first baffle 4. After the second baffle 5 and the first baffle 4 are folded, they can be turned upward around the transverse axis 7 to the entrance side wall 9, and the first baffle 4 can be rotated around the longitudinal axis 8 and hung flat on the entrance side wall 9, forming a folded storage state of the baffle 1.

[0007] When the baffle 1 is in the folded and stored state, the first baffle 4 rotates around the longitudinal axis 8 to be 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 axis 6 is provided with a thread, and a ground nut 10 is provided at the entrance ground corresponding to the folding axis 6. The thread of the folding axis 6 is screwed into the ground nut 10. The top of the folding axis 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 provided with a thread, and a ground nut 10 is provided at 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, and the support rod 3 supports the folding axis 6. A column 12 is provided at the end near the other end of the second baffle 5, and a thread is provided at the lower end of the column 12. A ground nut 10 is provided on the ground corresponding to the entrance of the column 12. The thread of the column 12 is screwed into the ground nut 10, and 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 to form a water-retaining state.

[0008] The two groups of baffles 1 on the left and right sides of the underground space entrance are butted against each other, and with the support of the card slots 2 and the support rods 3, a stable, closed and waterproof underground space entrance water-blocking baffle is formed.

[0009] The slot 2 is in a "┏┓" shape, made of aluminum alloy profiles, and fixed to the entrance side wall 9 with stainless steel expansion bolts. Slot sealing strips 13 are arranged on the inner sides of the two side edges of the slot 2. When the water-blocking state is unfolded, the end of the first baffle 4 is embedded in the slot 2 to squeeze the slot sealing strip 13 to seal and waterproof.

[0010] A hinge 14 is provided at the connection portion between the first baffle plate 4 and the second baffle plate 5, and the folding axis 6 penetrates into the hinge 14 to form a hinge. The folding axis 6 can rotate in the hinge, and a hinge seam sealing strip 15 is provided at the hinge of the first baffle plate 4 and the second baffle plate 5. When the two hinge seam sealing strips 15 are unfolded to be in the water-retaining state, they are squeezed tightly to seal and waterproof.

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

[0012] A butt joint sealing strip 17 is provided at the butt joint of the second baffle plates 5 of the two groups of baffle plates 1. When the butt joint sealing strips 17 are deployed in a water-blocking state, they are tightly sealed and waterproof.

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

[0014] The slot sealing strip (13), hinged seam sealing strip (15), butt joint sealing strip (17), and board bottom sealing strip (18) are made of EPDM rubber.

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

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

[0017] The inlet 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 upper clamp 22 of the folded baffle 1 tightens it.

[0018] The present invention is used to prevent ground water from entering the underground space during heavy rain. The beneficial effects are: the baffle is stored in a folding and hanging manner, which is easy to install in emergency use; two sets of baffles are unfolded and docked to adapt to a wide entrance. The baffle is inseparable from the support rod and accessories, and the accessories will not be lost. The baffle is easy to install and is firm and stable without the need for an additional wrench when installed with a self-contained rotating handle. All docking seams are made of EPDM rubber sealing strips, which have a good water-stopping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The plan view of the space entrance of the present invention; Figure 2 The front elevation view of the space entrance of the present invention; Figure 3 Side elevation view of the space entrance of the present invention; Figure 4 This is a schematic diagram of the baffle in the folded and stored state; Figure 5 This is a schematic diagram of the water retaining state of the baffle; Figure 6 It is a schematic diagram of the folding suspension of the baffle; Figure 7 It is a partial schematic diagram of the connection between the baffle and the card slot; Figure 8 It is a partial schematic diagram of the unfolding and folding axis of the baffle; Fig. 9 It is a partial schematic diagram of the baffle expansion joint; Fig.10 This is a cross-sectional view of the folding shaft support position.

[0020] In the figure: 1-baffle, 2-slot, 3-support rod, 4-first baffle, 5-second baffle, 6-folding axis, 7-horizontal axis, 8-longitudinal axis, 9-entrance side wall, 10-ground nut, 11-support foot, 12-column, 13-slot sealing strip, 14-hinge, 15-hinge seam sealing strip, 16-hoop, 17-pair seam sealing strip, 18-board bottom sealing strip, 19-rotating handle, 20-support rod connector, 21-bracket, 22-clamp, 23-lock buckle. DETAILED DESCRIPTION

[0021] In order for those skilled in the art to better understand the present invention, Figures 1 to 10 To further explain the present application, in the present description, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or directions or positional relationships commonly understood by those skilled in the art. They are 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 direction, be constructed and operated in a specific direction. The contents mentioned in the implementation manner are not limitations of the present invention.

[0022] The underground space entrance water blocking baffle of the present invention is installed at the underground space entrance, and the plan view is shown in FIG. Figure 1 , see the front elevation Figure 2 , side elevation view Figure 3 In order to prevent water accumulation on the ground, 3 to 5 steps are generally set up when designing the space entrance, which is a certain height above the ground. The water-blocking baffle includes two groups on the left and right, which are set between the two side walls of the space entrance of the upper platform of the steps. The water-blocking baffle mainly consists 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. The two groups of baffles 1 on the left and right of the underground space entrance are connected, and with the support of the slot 2 and the support rod 3, a stable, closed and waterproof underground space entrance water-blocking baffle is formed. Figure 1 , Figure 3 The arrow is the direction of water flow. Figure 2 The water-blocking baffle can be folded and stored when not in use and hung on the inlet side wall 9. The schematic diagram of the folded and stored state of the baffle is shown in FIG. Figure 4 , the schematic diagram of the baffle folding suspension is shown in Figure 6 When it is necessary to set up a water-blocking baffle during a rainstorm, it is deployed and supported at the entrance. The schematic diagram of the baffle deployed to block water is shown in Figure 5 .

[0023] A hinge 14 is provided at the connection between the first baffle 4 and the second baffle 5. The folding axis 6 is inserted into the hinge 14 to form a hinge. The folding axis 6 can rotate in the hinge. One end of the first baffle 4 and one end of the second baffle 5 are hinged together by the folding axis 6. The second baffle 5 can rotate around the folding axis 6 and fold or unfold with the first baffle 4. The other end of the first baffle 4 is connected to the card slot 2 by a horizontal axis 7 and a vertical axis 8. The vertical axis 8 is vertically hinged and installed in 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 and installed at the top of the card slot 2, and the vertical axis 8 is installed at the top edge of the first baffle 4. Figure 7 The folded first baffle 4 and the second baffle 5 can be turned upward 90° around the horizontal axis 7 to the entrance side wall 9. At this time, the folded first baffle 4 and the second baffle 5 are perpendicular to the entrance side wall 9. Then the first baffle 4 is rotated 90° around the longitudinal axis 8, and the first baffle 4 is hung flat on the entrance side wall 9, forming a folded storage state of the baffle 1. Figure 4 , the schematic diagram of the baffle folding suspension is shown in Figure 6 The top surfaces of the first baffle 4 and the second baffle 5 are provided with a lock 23. After the first baffle 4 and the second baffle 5 are folded, the support rod 3 is also folded and clamped on the first baffle 4 and the second baffle 5. The lock 23 locks and fixes the support rod 3. 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 upper clamp 22 of the folded baffle 1 tightens it. Figure 6 .

[0024] When the baffle 1 is in the folded storage state, the first baffle 4 rotates 90° around the longitudinal axis 8 to be perpendicular to the inlet side wall 9, and then flips downward 90° 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 provided with a thread, and a ground nut 10 is provided on the inlet ground corresponding to the folding shaft 6. The thread of the folding shaft 6 is screwed into the ground nut 10. The top of the folding shaft 6 is connected to the strut 3 through the strut connector 20. The other end of the strut 3 is provided with a support foot 11. The lower end of the support foot 11 is provided with a thread, and a ground nut 10 is provided on the inlet 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 strut 3 supports the folding shaft 6. Figure 8 A column 12 is provided at the end near the other end of the second baffle 5, and a clamp 16 is provided at the connection between the column 12 and the second baffle 5. The column 12 can rotate when inserted into the clamp 16. A thread is provided at the lower end of the column 12, and a ground nut 10 is provided on the ground corresponding to the entrance of 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 through the support rod connector 20. The support leg 11 of the support rod 3 is bolted into the ground nut 10. The support rod 3 supports the column 12. The second baffles 5 of the left and right groups of baffles 1 at the entrance are connected. Fig. 9 .

[0025] The inner sides of the two side edges of the card slot 2 are provided with card slot sealing strips 13. In the unfolded water-blocking state, the end of the first baffle 4 is embedded in the card slot 2 and squeezes the card slot sealing strip 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 two hinge joint sealing strips 15 are deployed in the water-blocking state, they are tightly sealed and waterproof. Figure 8 The space entrance is provided with two groups of baffles 1 on the left and right, and the butt joints of the second baffles 5 of the two groups of baffles 1 are provided with butt joint sealing strips 17. When the two butt joint sealing strips 17 are deployed in the water-blocking state, they are tightly sealed and waterproof. Fig. 9 The bottom of the first baffle 4 and the second baffle 5 is provided with a bottom sealing strip 18. When the folding shaft 6 and the column 12 of the first baffle 4 and the second baffle 5 are screwed into the ground nut 10, the bottom sealing strip 18 is pressed tightly against the entrance ground to seal and waterproof. Figure 5 , Figure 7 , Figure 8 , Fig. 9 The sealing strip is made of EPDM, which is resistant to ozone, heat and weather, has good flexibility at low temperatures and has a good water-stopping effect.

[0026] The height of the baffle 1 is set according to the water retaining requirements, and generally 600~1000mm is appropriate. The baffle 1 is made of aluminum alloy profiles. The aluminum alloy profiles are hollow structures, which can reduce weight. The thickness of the profiles is 50~80mm and the width is 100~200mm. Gas shielded welding is used to splice according to the height of the baffle 1. The first baffle 4 and the second baffle 5 are calculated according to the required length of the profiles according to the width of the space entrance. The two ends of the cut profiles are welded and sealed with aluminum alloy plates to prevent water from entering the hollow part of the profiles. The hinge 14 is installed at the hinged position of the first baffle 4 and the second baffle 5. The center of the folding axis 6 should be on the inner edge of the folded first baffle 4 and the second baffle 5, but considering the manufacturing and installation errors, the center of the hinge 14 is moved outward by 3~5mm. There is a certain gap between the first baffle 4 and the second baffle 5 after folding, so that the baffle 1 will not be loose.

[0027] The slot 2 is in the shape of "┏┓" and is made of aluminum alloy. The height of the slot 2 is based on the height of the baffle 1. The thickness of the bottom sealing strip 18 at the bottom of the baffle 1 and the installation height of the horizontal axis 7 and the vertical axis 8 should be considered. The slot 2 is provided with a mounting hole 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 the slot 2 and the entrance side wall 9 to prevent water seepage from between the slot 2 and the entrance side wall 9.

[0028] All components of the present invention are integrated into one and cannot be removed, which can avoid the loss of components. A handle 19 is provided at the top of the folding shaft 6 and the column 12, which is used to rotate and fix the folding shaft 6 and the column 12. The direction of the handle 19 can be flipped 180°. When the handle 19 is rotated to a certain position that is not convenient, the wrench can be flipped 180° to the other side to adapt to operations in different positions. A clamping 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 limit the up and down movement of the folding shaft 6 and the column 12. When the handle 19 is moved, the folding shaft 6 and the column 12 can only rotate and cannot be pulled out. 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 through 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 with the support foot 11, so that the bottom surface of the support foot 11 is close to the ground nut 10. The ground nut 10 is installed in a box with a lid, and the box is buried under the ground. The box lid is closed and flush with the ground, which does not affect the passage of pedestrians. The box lid is opened when the water-blocking baffle is installed. Fig.10 , the column 12 can be used as a reference. The support rod 3, the folding shaft 6, the column 12, the support foot 11, the rotating handle 19, and the support rod connecting piece 20 are made of stainless steel.

[0029] The lengths of the first baffle 4 and the second baffle 5 are not consistent. 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 card slot 2 and the wall thickness of the card slot 2 should be considered. The end of the first baffle 4 and the card slot 2 should have a gap of about 10mm. The first baffle 4 is embedded in the card slot 2 by 40~60mm. When the first baffle 4 and the second baffle 5 are folded, the first baffle 4 is embedded in the card slot 2, and the second baffle 5 and the outer edge of the card slot 2 leave a gap of 30~50mm. The hinged end of the first baffle 4 and the second baffle 5 is provided with a hinged seam sealing strip 15. Each hinged seam sealing strip 15 is about 10mm after extrusion. When the first baffle 4 and the second baffle 5 are unfolded, the extrusion seam width of the two hinged seam sealing strips 15 is about 20mm. The butt joint sealing strips 17 at the joint of the second baffles 5 of the two groups of baffles 1 are about 10mm after extrusion. The extrusion seam width of the butt joint sealing strips 17 of the two second baffles 5 is about 20mm. According to the above principle, the lengths of the first baffle 4 and the second baffle 5 are calculated based on the width of the underground space entrance, and the thickness of the profile end plate needs to be subtracted.

[0030] The nuts 10 are arranged according to the positions of the folding shafts 6 or the upright posts 12 on the manufactured baffle 1 and the positions of the corresponding supporting legs 11 .

[0031] One end of the first baffle plate 4 of the baffle plate 1 is mounted in the slot 2, a bracket 21 and a clamp 22 are mounted on the inlet side wall 9, and the baffle plate 1 is folded and hung on the inlet side wall 9 for standby use.

[0032] The description and drawings of this application are only a specific implementation method and are not restrictive. Under the guidance of this application, technicians in this field can make many forms without departing from the scope of protection of the purpose of this application, all of which are within the scope of protection of this application.

Claims

1. A water-blocking baffle at the entrance of an underground space, characterized by: The water-blocking baffle comprises two groups, one on the left and the other on the right, which are mainly composed of a baffle (1), a slot (2), and a support rod (3); the baffle (1) comprises 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 hingedly connected together by a folding axis (6); the second baffle (5) can rotate around the folding axis (6) to be folded or unfolded with the first baffle (4); The other end of the first baffle (4) is connected to the slot (2) by means of a transverse axis (7) and a longitudinal axis (8); the longitudinal axis (8) is vertically hingedly mounted at the middle of the transverse axis (7); both ends of the transverse axis (7) are hingedly mounted at the top of the slot (2); and the longitudinal axis (8) is mounted at the top edge of the first baffle (4); after the second baffle (5) and the first baffle (4) are folded, they can be turned upward around the transverse axis (7) to the entrance side wall (9); and the first baffle (4) can be rotated around the longitudinal axis (8) to be flatly hung on the entrance side wall (9), thereby forming a folded storage state of the baffle (1); When the baffle (1) is in the folded and stored state, the first baffle (4) rotates around the longitudinal axis (8) to be 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 provided with a thread, and a ground nut (10) is provided on the ground corresponding to the entrance of 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 provided with a thread, and the thread of the support foot (11) is provided with a thread. A ground nut (10) is provided on the entrance ground, the support leg (11) is threaded into the ground nut (10), and the support rod (3) supports the folding shaft (6); a column (12) is provided at the end close to the other end of the second baffle (5), the lower end of the column (12) is provided with a thread, and a ground nut (10) is provided on the entrance ground corresponding to the column (12), the thread of the column (12) is screwed into the ground nut (10), the top end of the column (12) is connected to the support rod (3), the support leg (11) of the support rod (3) is bolted into the ground nut (10), the support rod (3) supports the column (12), and a water retaining state is formed; The two groups of baffles (1) on the left and right sides of the underground space entrance are butted against each other, and with the support of the slots (2) and the support rods (3), a stable, closed and waterproof underground space entrance water-blocking baffle is formed.

2. The underground space entrance water blocking baffle according to claim 1 is characterized by: The card slot (2) is in a "┏┓" shape and is made of an aluminum alloy profile. It is fixed to the entrance side wall (9) using stainless steel expansion bolts. Card slot sealing strips (13) are arranged on the inner sides of two side edges of the card slot (2). In the unfolded water-blocking state, the end of the first baffle (4) is embedded in the card slot (2) and squeezes the card slot sealing strip (13) to seal and prevent water.

3. The underground space entrance water blocking baffle according to claim 1 is characterized by: A hinge (14) is provided at the connection portion between the first baffle plate (4) and the second baffle plate (5), the folding shaft (6) penetrates into the hinge (14) to form a hinge, and the folding shaft (6) can rotate in the hinge. A hinge joint sealing strip (15) is provided at the hinge joint between the first baffle plate (4) and the second baffle plate (5), and when in the unfolded water-blocking state, the two hinge joint sealing strips (15) are squeezed together to seal and waterproof.

4. The underground space entrance water blocking baffle according to claim 1 is characterized by: A clamp (16) is provided at the connection portion between the upright post (12) and the second baffle (5), and the upright post (12) is inserted into the clamp (16) and is rotatable.

5. The underground space entrance water blocking baffle according to claim 1 is characterized by: A butt joint sealing strip (17) is provided at the butt joint of the second baffle plates (5) of the two groups of baffle plates (1). When in the unfolded water-blocking state, the two butt joint sealing strips (17) are squeezed tightly to seal and waterproof.

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

7. The underground space entrance water blocking baffle according to claim 2 or 3 or 5 or 6, characterized in that: The slot sealing strip (13), hinged seam sealing strip (15), butt joint sealing strip (17), and bottom sealing strip (18) are made of EPDM rubber.

8. The underground space entrance water blocking baffle according to claim 1 is characterized by: The top ends of the folding shaft (6) and the column (12) are provided with a rotating handle (19) for rotating and fixing the folding shaft (6) and the column (12).

9. The underground space entrance water blocking baffle according to claim 7, characterized in that: A support rod connecting piece (20) is provided at the lower part of the rotating handle (19); the support rod (3) is connected to the folding axis (6) and the column (12) via the support rod connecting piece (20); the support rod connecting piece (20) can rotate around the folding axis (6) and the column (12); the support rod (3) can rotate around the support rod connecting piece (20); and the rotating handle (19) presses the support rod connecting piece (20) against the top of the baffle (1).

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

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