A subway tunnel drainage structure

Abstract

The present application relates to a subway tunnel drainage structure, which belongs to the technical field of drainage construction. It includes a drainage pipe, the water inlet end of the drainage pipe is covered with a filter cover, the filter cover itself has filter holes, and a clamping assembly is arranged in the filter cover; the clamping assembly includes a positioning rod, a clamping plate and a locking piece, one end of the positioning rod is fixedly connected to the inner wall of the filter cover, and the other end is fixedly connected to the clamping plate, the end of the drainage pipe is inserted and fixed to the clamping plate, and one end of the locking piece passes through the clamping plate and abuts against the outer wall of the drainage pipe; the cross-sectional area of ​​the clamping plate inside the drainage pipe is smaller than the cross-sectional area of ​​the water inlet of the drainage pipe. The present application has the effect of reducing the risk of pipeline blockage and ensuring the normal drainage.

Description

Technical Field

[0001] The present application relates to the technical field of drainage construction, and in particular to a drainage structure for a subway underground tunnel. Background Art

[0002] Drainage is an indispensable part of engineering construction. Only reasonable and effective drainage can ensure the normal progress of subsequent engineering construction and prevent the pore water in the soil or mountain from affecting the building.

[0003] Currently, sewage and accumulated water in tunnels are mainly cleared by pumping them out with air pumps or by digging deep and laying underground pipes. In other words, the accumulated water inside the subway is drained to the outside of the subway through external pipes or deep digging.

[0004] During the construction process, the inventors discovered that since tunnel sewage generally contains solid waste, there is a defect of clogging the pipes when the sewage in a solid-liquid mixed state is drained using an air pump or laying pipes. Summary of the Invention

[0005] In order to reduce the risk of pipe blockage and ensure normal drainage, the present application provides a subway underground tunnel drainage structure.

[0006] The present application provides a subway tunnel drainage structure that adopts the following technical solutions:

[0007] A subway tunnel drainage structure includes a drainage pipe, wherein the water inlet end of the drainage pipe is covered with a filter cover, the filter cover itself has filter holes, and a clamping assembly is arranged in the filter cover; the clamping assembly includes a positioning rod, a clamping plate and a locking piece, one end of the positioning rod is fixedly connected to the inner wall of the filter cover, and the other end is fixedly connected to the clamping plate, the end of the drainage pipe is inserted and fixed to the clamping plate, and one end of the locking piece passes through the clamping plate and abuts against the outer wall of the drainage pipe; the cross-sectional area of ​​the clamping plate inside the drainage pipe is smaller than the cross-sectional area of ​​the water inlet of the drainage pipe.

[0008] By adopting the above technical solution, the filter cover is placed in the drainage channel or water accumulation area in the subway, and the drainage pipe and the filter cover are embedded and fixed. The filter cover can block solid waste and allow the accumulated water to flow smoothly in the drainage pipe, reducing the risk of pipe blockage and ensuring normal drainage.

[0009] Optionally, the positioning rod includes an outer rod, an inner rod and a first spring, one end of the inner rod is fixedly connected to the inner wall of the filter cover, and the other end is inserted into the outer rod, the first spring is located inside the outer rod, one end of the first spring is fixedly connected to the end of the inner rod, and the other end is fixedly connected to the inner wall of the outer rod, and the end of the outer rod away from the inner rod is fixedly connected to the locking member.

[0010] By adopting the above technical solution, the presence of the first spring can enable the outer rod to move relative to the inner rod. When drain pipes of different diameters are located inside the filter cover, the clamping assembly can still connect and limit the drain pipes by compressing the first spring.

[0011] Optionally, a filter plate is provided on the water-facing surface of the filter cover, the filter plate is L-shaped, the top of the filter plate is rotatably connected to the filter cover, the rotating shaft is horizontally set, and a lifting assembly is provided on the top of the filter cover, which is used to drive the filter plate to rotate to a horizontal state.

[0012] By adopting the above technical solution, solid waste is blocked by the filter cover. Over time, a large amount of solid waste accumulates outside the filter cover, which will reduce the drainage efficiency. The L-shaped filter plate does not affect the passage of accumulated water and can also block the solid waste. When too much solid waste accumulates, the filter plate is rotated to a horizontal state. At this time, the L-shaped filter plate carries the solid waste and is lifted up for workers to clean up, thereby ensuring the drainage efficiency.

[0013] Optionally, the lifting assembly includes a motor, a first bevel gear and a second bevel gear. The motor is vertically fixed on the filter cover, the first bevel gear is sleeved on the motor rotating shaft, the second bevel gear is sleeved on the rotating shaft of the filter plate, and the first bevel gear and the second bevel gear are meshed.

[0014] By adopting the above technical solution, the motor is started, the motor drives the first bevel gear to rotate, and the first bevel gear drives the second bevel gear to rotate, so that the filter plate rotates to a horizontal state.

[0015] Optionally, a scraper bar and a slide rail are provided on the filter plate. The scraper bar is arranged close to the filter plate. The scraper bar and the slide rail are both located on the side wall of the filter plate away from the filter cover. The slide rail is arranged parallel to the rotating axis of the filter plate, and the scraper bar is arranged on the slide rail along the length direction of the slide rail.

[0016] By adopting the above technical solution, when the filter plate is lifted up with solid waste, the solid waste can be quickly cleaned by the sliding scraper, thereby improving work efficiency.

[0017] Optionally, a rack is slidingly provided on the top of the filter plate, the rack is fixedly connected to the scraper bar, the rack is arranged parallel to the rotating shaft of the filter plate, a spur gear is ringed on the rotating shaft of the motor, the spur gear is slidingly provided relative to the rotating shaft of the motor, and the sliding direction slides along the length direction of the rotating shaft of the motor; when the filter plate is in a horizontal state, the spur gear is engaged with the rack, and the rotating shaft of the motor drives the spur gear to rotate; a disengagement component is provided on the filter cover, and when the filter plate is in a horizontal state, the disengagement component is used to control the first bevel gear to disengage from the drive of the rotating shaft of the motor and keep the position of the first bevel gear stationary.

[0018] By adopting the above technical solution, the setting of the rack and the spur gear makes full use of the motor, so that the motor can also drive the scraper to move, and at the same time cooperates with the disengagement component to achieve full utilization of the motor. When the filter plate rotates to a horizontal state, the disengagement component disengages the first bevel gear from the limit of the motor rotating shaft, and the motor just drives the spur gear to rotate, reducing resource waste and making full and reasonable use of resources.

[0019] Optionally, a second spring and a limit block are provided on the rotating shaft of the motor, and a accommodating groove is opened on the rotating shaft of the motor, and a positioning groove is opened on the inner wall of the first bevel gear, the positioning groove is opened along the length direction of the rotating shaft of the motor and through the top wall of the first bevel gear, the second spring is located in the accommodating groove, one end of the second spring is fixedly connected to the groove bottom of the accommodating groove, and the other end is fixedly connected to one end of the limit block, one end of the limit block is located in the accommodating groove, and the other end is located in the positioning groove; the limit block is inclined at the top surface of the positioning groove, and the setting direction is inclined downward along the direction away from the second spring, and the disengagement assembly includes a pedal block, a third spring and an insertion strip, one end of the third spring is fixedly connected to the filter cover, and the other end is fixedly connected to the pedal block, one end of the insertion strip is fixedly connected to the pedal block, and the other end is located directly above the positioning groove, and when the third spring is compressed, the insertion strip is inserted into the positioning groove; the insertion strip is adapted to the positioning groove, and the cross-section of the insertion strip located in the positioning groove is non-circular.

[0020] By adopting the above technical solution, the second spring, the limit block, the accommodating groove and the positioning groove are set, so that the motor shaft drives the first bevel gear to rotate, and the existence of the disengagement component can compress the limit block into the accommodating groove. At this time, the horizontal limit between the first bevel gear and the motor shaft disappears, and the motor shaft rotates relative to the first bevel gear. At the same time, since the cross-section of the insertion strip in the positioning groove is non-circular, it is fully guaranteed that the first bevel gear is in place and the filter plate is kept in a horizontal state.

[0021] Optionally, a protrusion is fixed on the rotating shaft of the motor, and a slot is opened on the inner wall of the spur gear. The slot is opened along the length direction of the rotating shaft of the motor and penetrates the bottom wall of the spur gear. A limit plate is fixed on the pedal block, and two limit plates are provided, one at the top and one at the bottom of the spur gear, and the limit plates are in contact with the spur gear; when the spur gear is engaged with the rack, the protrusion is located in the slot.

[0022] By adopting this technical solution, when the treadle is pressed downward, the limit plate drives the spur gear to move on the motor's rotating shaft, positioning the protrusion within the slot, achieving a state where the motor drives the spur gear. When the downward pressure on the treadle is removed, the limit plate drives the spur gear to move, releasing the protrusion and slot from their limits. At this point, the spur gear no longer rotates with the motor. If the filter plate rotates excessively, beyond its horizontal position, the rack will press against the spur gear, potentially damaging it. The movable spur gear prevents this possibility.

[0023] Optionally, a guide rod is fixed on the top of the filter cover, the third spring ring is sleeved on the outside of the guide rod, the top end of the guide rod is inserted into the inside of the pedal block, and the pedal block slides relative to the guide rod along the length direction of the guide rod.

[0024] By adopting the above technical solution, the setting of the guide rod plays a guiding role on the treading block, ensuring that the insert can be accurately inserted into the positioning groove.

[0025] Optionally, wing plates are fixed on two opposite vertical side walls of the filter cover, and the wing plates are located at the top of the vertical side walls.

[0026] By adopting the above technical solution, the presence of the wing plate enables the filter cover to be erected on the drainage channel, making it easy to manually collect the filter cover, and also enables the filter cover to have a certain load-bearing capacity.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The lifting assembly can drive the filter plate to a horizontal state, and according to the shape of the filter plate, it can lift the solid waste in the accumulated water to facilitate manual cleaning;

[0029] 2. The disengagement assembly is equipped with spur gears and racks to fully utilize the motor resources. One motor can provide driving force for the scraper and filter plate at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of an embodiment of the present application;

[0031] Figure 2 1. It is a schematic diagram of the filter plate rotating to a horizontal state;

[0032] Figure 3 It is a cross-sectional view showing the internal structure of the clamping assembly;

[0033] Figure 4 This is a cross-sectional view of part of the structure at the limit block.

[0034] In the figure, 1. filter cover; 11. wing plate; 12. guide rod; 2. clamping assembly; 21. positioning rod; 211. outer rod; 212. inner rod; 213. first spring; 22. clamping plate; 23. locking member; 3. filter plate; 31. scraper; 32. slide rail; 33. rack; 4. lifting assembly; 41. motor; 42. first bevel gear; 43. second bevel gear; 5. spur gear; 51. slot; 52. bump; 6. disengagement assembly; 61. pedal block; 62. insert; 63. third spring; 7. limit block; 71. receiving groove; 72. positioning groove; 73. second spring; 8. drain pipe; 9. limit plate. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The embodiment of the present application discloses a drainage structure for a subway underground tunnel.

[0037] refer to Figure 1 A subway underground tunnel drainage structure includes a drainage pipe 8, an air pump or a water pump outside the drainage pipe 8 is connected, and a filter cover 1 is provided at the water inlet end of the drainage pipe 8. The filter cover 1 completely covers the water inlet of the drainage pipe 8, thereby blocking the solid waste in the accumulated water and ensuring smooth drainage inside the drainage pipe 8.

[0038] refer to Figure 1 The filter cover 1 itself has filter holes, and wing plates 11 are fixed on the two symmetrical outer walls of the filter cover 1. The wing plates 11 are located at the top of the side walls. When the filter cover 1 is placed in the drain ditch, the wing plates 11 are erected on the top of the drain ditch, which makes it easier for workers to recycle the filter cover 1. At the same time, it also enhances the pressure resistance of the filter cover 1, and provides support for applying pressure on the top of the filter cover 1 later.

[0039] refer to Figure 2 and Figure 3 A clamping assembly 2 is provided on the inner wall of the filter cover 1, and the clamping assembly 2 includes a positioning rod 21, a splint 22 and a locking member 23. The positioning rod 21 includes an inner rod 212, an outer rod 211 and a first spring 213. One end of the inner rod 212 is fixedly connected to the inner wall of the filter cover 1, and the other end is inserted into the outer rod 211. The first spring 213 is located inside the outer rod 211. One end of the first spring 213 is fixedly connected to the inner wall of the outer rod 211, and the other end is fixedly connected to the end of the inner rod 212 located inside the outer rod 211. The end of the outer rod 211 away from the inner rod 212 is fixedly connected to the splint 22. The splint 22 is C-shaped and is clamped on the drain pipe 8. The splint 22 is selected to be elastic, thereby enhancing the clamping effect on the drain pipe 8. In this embodiment, the locking member 23 is a bolt. One end of the locking member 23 passes through the clamping plate 22 and abuts against the outer wall of the drain pipe 8. The locking member 23 is then threadedly connected to the clamping plate 22. In this embodiment, four clamping assemblies 2 are provided, thereby mounting the drain pipe 8 within the filter housing 1. This ensures a distance between the drain pipe 8 and the bottom of the filter housing 1, reducing the probability of solid waste entering the drain pipe 8. The cross-sectional area of ​​the clamping plate 22 within the drain pipe 8 is smaller than the cross-sectional area of ​​the water inlet of the drain pipe 8. In other words, the size of the clamping plate 22 does not affect the smooth flow of water into the drain pipe 8.

[0040] refer to Figure 2 and Figure 3A filter plate 3 is rotatably provided on the filter cover 1. The filter plate 3 is located on the water-facing surface of the filter cover 1. The filter plate 3 is L-shaped. The rotation axis of the filter plate 3 and the filter cover 1 is located at the top of the filter cover 1. The rotation axis is horizontally arranged and perpendicular to the drain pipe 8. A lifting assembly 4 is provided on the filter cover 1. The lifting assembly 4 includes a motor 41, a first bevel gear 42 and a second bevel gear 43. The motor 41 is fixed to the inner wall of the filter cover 1 and is located at the top inner wall of the filter cover 1. The rotation axis of the motor 41 passes through the filter cover 1. The motor 41 is vertically arranged. The first bevel gear 42 is sleeved on the rotation axis of the motor 41. The second bevel gear 43 is sleeved on the rotation axis of the filter plate 3. The first bevel gear 42 and the second bevel gear 43 are engaged, thereby rotating the filter plate 3 to a horizontal state.

[0041] refer to Figure 3 and Figure 4 A limit block 7 and a second spring 73 are provided on the rotating shaft of the motor 41. A receiving groove 71 is provided on the rotating shaft of the motor 41. The receiving groove 71 is horizontally provided. The second spring 73 is located in the receiving groove 71. One end of the second spring 73 is fixedly connected to the bottom of the receiving groove 71, and the other end is fixedly connected to the limit block 7. A positioning groove 72 is provided on the inner wall of the first bevel gear 42. The positioning groove 72 is vertically provided and penetrates the top wall of the first bevel gear 42. One end of the limit block 7 is located in the receiving groove 71, and the other end is located in the positioning groove 72. The top wall of the limit block 7 located in the positioning groove 72 is tilted and is set downwardly away from the second spring 73. The positioning groove 72 and the limit block 7 achieve horizontal limitation between the rotating shaft of the motor 41 and the first bevel gear 42, so that the motor 41 can drive the first bevel gear 42 to rotate.

[0042] refer to Figure 2 The filter plate 3 is provided with a slide rail 32 and a scraper bar 31. The length direction of the slide rail 32 is arranged along the direction of the rotation axis of the filter plate 3. The slide rail 32 is fixedly connected to the filter plate 3. The scraper bar 31 is arranged perpendicular to the slide rail 32. The scraper bar 31 slides on the slide rail 32 along the length direction of the slide rail 32 and does not separate from the slide rail 32. A rack 33 is fixed to one end of the scraper bar 31 close to the rotation axis of the filter plate 3, and the length direction of the rack 33 is arranged along the length direction of the slide rail 32.

[0043] refer to Figure 3 and Figure 4 A spur gear 5 is sleeved on the rotating shaft of the motor 41, and the spur gear 5 slides along the length direction of the rotating shaft of the motor 41. A protrusion 52 is fixed on the rotating shaft of the motor 41, and the protrusion 52 is arranged horizontally. A slot 51 is opened on the inner wall of the spur gear 5, and the slot 51 is opened in the vertical direction and penetrates the bottom end face of the spur gear 5. When the filter plate 3 rotates to a horizontal state, the spur gear 5 slides downward, the protrusion 52 is inserted into the slot 51, and the spur gear 5 engages with the rack 33.

[0044] refer to Figure 3 and Figure 4 The filter cover 1 is provided with a disengagement assembly 6 and a guide rod 12. The guide rod 12 is vertically fixed to the top of the filter cover 1. The disengagement assembly 6 includes a pedal block 61, an insert 62 and a third spring 63. The third spring 63 is sleeved on the outside of the guide rod 12. One end of the third spring 63 is fixedly connected to the filter cover 1, and the other end is fixedly connected to the pedal block 61. The guide rod 12 is inserted into the inside of the pedal block 61. The pedal block 61 slides relative to the guide rod 12 along the length direction of the guide rod 12. The insert 62 is L-shaped in this embodiment, but can also be other shapes. One end of the insertion strip 62 is fixedly connected to the outer wall of the pedal block 61, and the other end is located just above the positioning groove 72. When the pedal block 61 is pressed down, the third spring 63 is compressed, and one end of the insertion strip 62 is inserted into the positioning groove 72 and squeezes the limit block 7 back into the accommodating groove 71. At this time, the limit between the first bevel gear 42 and the rotating shaft of the motor 41 is cancelled, and the rotating shaft of the motor 41 rotates relative to the first bevel gear 42. Since the cross-section of the insertion strip 62 located in the positioning groove 72 is non-circular, a rectangular shape is used in this embodiment, which ensures the stable placement of the first bevel gear 42, and it is continuously limited with the second bevel gear 43 and will not rotate.

[0045] refer to Figure 4 , a limit plate 9 is fixed on the outer wall of the pedal block 61, and two limit plates 9 are provided. The limit plates 9 are both arranged horizontally and distributed at the top and bottom of the spur gear 5. The limit plates 9 abut against the spur gear 5. When the pedal block 61 drives the inserting strip 62 to be inserted into the positioning groove 72, the pedal block 61 also drives the spur gear 5 to move downward, and finally the protrusion 52 is located in the slot 51, so that the first bevel gear 42 is disengaged from the drive of the motor 41, so that the motor 41 only drives the spur gear 5 to rotate.

[0046] The implementation principle of the subway tunnel drainage structure in the embodiment of the present application is as follows: the drainage pipe 8 is clamped and fixed on the clamping assembly 2, and the filter cover 1 is placed in the drainage channel for drainage. When cleaning is required, the motor 41 is started, and the motor 41 drives the first bevel gear 42 to rotate, and drives the filter plate 3 to rotate to a horizontal state through the second bevel gear 43. At this time, the pedal block 61 is pressed down with the foot to disengage the first bevel gear 42 from the drive of the motor 41, and ensure that the first bevel gear 42 is continuously engaged with the second bevel gear 43, and the motor 41 drives the spur gear 5 to rotate, and the spur gear 5 is engaged with the rack 33, driving the scraper 31 to clean the solid waste carried by the filter plate 3 to the side of the drainage channel, thereby ensuring drainage efficiency and reducing the occurrence of blockage in the drainage pipe 8.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A subway tunnel drainage structure, comprising a drainage pipe (8), characterized in that: The water inlet end of the drain pipe (8) is covered with a filter cover (1), the filter cover (1) itself has a filter hole, and a clamping assembly (2) is arranged in the filter cover (1); the clamping assembly (2) includes a positioning rod (21), a clamping plate (22) and a locking member (23); one end of the positioning rod (21) is fixedly connected to the inner wall of the filter cover (1), and the other end is fixedly connected to the clamping plate (22); the end of the drain pipe (8) is inserted and fixed to the clamping plate (22); one end of the locking member (23) passes through the clamping plate (22) and then abuts against the outer wall of the drain pipe (8); the cross-sectional area of ​​the clamping plate (22) located inside the drain pipe (8) is smaller than the cross-sectional area of ​​the water inlet of the drain pipe (8) The filter cover (1) is provided with a filter plate (3) on the water-facing surface thereof, the filter plate (3) being L-shaped, the top of the filter plate (3) being rotatably connected to the filter cover (1), the rotating shaft being arranged horizontally, and a lifting assembly (4) being provided on the top of the filter cover (1), the lifting assembly (4) being used for driving the filter plate (3) to rotate to a horizontal state; the lifting assembly (4) comprising a motor (41), a first bevel gear (42) and a second bevel gear (43), the motor (41) being vertically fixed on the filter cover (1), the first bevel gear (42) being sleeved on the rotating shaft of the motor (41), and the second bevel gear (43) being sleeved on the filter plate (3). On the rotating shaft, the first bevel gear (42) and the second bevel gear (43) are meshed; a scraper (31) and a slide rail (32) are provided on the filter plate (3); the scraper (31) is arranged close to the filter plate (3); the scraper (31) and the slide rail (32) are both located on the side wall of the filter plate (3) away from the filter cover (1); the slide rail (32) is arranged parallel to the rotating shaft of the filter plate (3); the scraper (31) slides on the slide rail (32) along the length direction of the slide rail (32); a rack (33) is slidingly provided on the top of the filter plate (3); the rack (33) is fixedly connected to the scraper (31); the rack (33) is parallel to the filter plate ( 3), a spur gear (5) is sleeved on the rotating shaft of the motor (41), and the spur gear (5) is slidably arranged relative to the rotating shaft of the motor (41), and the sliding direction slides along the length direction of the rotating shaft of the motor (41); when the filter plate (3) is in a horizontal state, the spur gear (5) is engaged with the rack (33), and the rotating shaft of the motor (41) drives the spur gear (5) to rotate; a disengagement component (6) is provided on the filter cover (1), and when the filter plate (3) is in a horizontal state, the disengagement component (6) is used to control the first bevel gear (42) to disengage from the drive of the rotating shaft of the motor (41) and keep the first bevel gear (42) in a fixed position;A second spring (73) and a limit block (7) are provided on the rotating shaft of the motor (41); a receiving groove (71) is provided on the rotating shaft of the motor (41); a positioning groove (72) is provided on the inner wall of the first bevel gear (42); the positioning groove (72) is provided along the length direction of the rotating shaft of the motor (41) and penetrates the top wall of the first bevel gear (42); the second spring (73) is located in the receiving groove (71); one end of the second spring (73) is fixedly connected to the bottom of the receiving groove (71), and the other end is fixedly connected to one end of the limit block (7); one end of the limit block (7) is located in the receiving groove (71), and the other end is located in the positioning groove (72); the limit block (7) is located The top surface of the positioning groove (72) is inclined, and the setting direction is inclined downward in the direction away from the second spring (73). The disengagement component (6) includes a pedal block (61), a third spring (63) and an insertion strip (62). One end of the third spring (63) is fixedly connected to the filter cover (1), and the other end is fixedly connected to the pedal block (61). One end of the insertion strip (62) is fixedly connected to the pedal block (61), and the other end is located directly above the positioning groove (72). When the third spring (63) is compressed, the insertion strip (62) is inserted into the positioning groove (72); the insertion strip (62) and the positioning groove (72) are adapted, and the cross section of the insertion strip (62) located in the positioning groove (72) is non-circular.

2. The subway tunnel drainage structure according to claim 1, characterized in that: The positioning rod (21) comprises an outer rod (211), an inner rod (212) and a first spring (213); one end of the inner rod (212) is fixedly connected to the inner wall of the filter cover (1), and the other end is inserted into the outer rod (211); the first spring (213) is located inside the outer rod (211); one end of the first spring (213) is fixedly connected to the end of the inner rod (212), and the other end is fixedly connected to the inner wall of the outer rod (211); the end of the outer rod (211) away from the inner rod (212) is fixedly connected to the clamping plate (22).

3. The subway tunnel drainage structure according to claim 1, characterized in that: A protrusion (52) is fixed on the rotating shaft of the motor (41), a slot (51) is opened on the inner wall of the spur gear (5), the slot (51) is opened along the length direction of the rotating shaft of the motor (41) and penetrates the bottom wall of the spur gear (5), a limiting plate (9) is fixed on the pedal block (61), two limiting plates (9) are provided, one limiting plate (9) is distributed on the top and the bottom of the spur gear (5), and the limiting plates (9) are in contact with the spur gear (5); when the spur gear (5) is engaged with the rack (33), the protrusion (52) is located in the slot (51).

4. The subway tunnel drainage structure according to claim 1, characterized in that: A guide rod (12) is fixed on the top of the filter cover (1), a third spring (63) is sleeved on the outside of the guide rod (12), the top end of the guide rod (12) is inserted into the inside of the pedal block (61), and the pedal block (61) slides relative to the guide rod (12) along the length direction of the guide rod (12).

5. The subway tunnel drainage structure according to claim 1, characterized in that: Wing plates (11) are fixed on two opposite vertical side walls of the filter cover (1), and the wing plates (11) are located at the tops of the vertical side walls.

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