Tunnel construction drainage device

Abstract

The application relates to the technical field of tunnel construction drainage, in particular to a tunnel construction drainage device, which comprises a moving vehicle, a water pump box is arranged above the moving vehicle, a water pump is arranged in the water pump box, a drainage pipe is arranged on one side of the water pump box, a connecting head is screw-connected on the pipe opening of the water suction pipe, a filter cylinder is arranged on the right side of the connecting head, a filter screen plate is detachably arranged on the right side end surface of the filter cylinder, a rotating shaft rod is rotatably inserted into the upper portion of the filter cylinder and extends to the side surface of the filter screen plate, a motor is arranged above the filter cylinder, the output shaft of the motor is connected with the rotating shaft rod, a cam block is arranged on the lower end surface of the rotating shaft rod and can rotate and vibrate against the side surface of the filter screen plate; the filter self-cleaning mechanism arranged at the pipe opening of the water suction pipe can quickly clean the silt adhered to the outer side surface of the filter screen plate under the vibrating state, so that the water suction pipe can quickly suck out the seepage water generated in the tunnel construction in the water pit.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction drainage technology, specifically a tunnel construction drainage device. Background Technology

[0002] Although the design and construction technologies for urban tunnels are relatively mature, the prevention and drainage of water leakage in tunnel structures remains a key focus and challenge in design and construction. Tunnel waterproofing systems include self-waterproofing of the concrete structure, external waterproofing layers, and detailed waterproofing structures such as expansion joints, construction joints, through-wall pipes, and embedded parts. Despite the emphasis placed on tunnel waterproofing and drainage systems throughout the design and construction process, water leakage is still unavoidable in actual projects; varying degrees of leakage can occur in waterproofing layers, detailed structures, and other areas.

[0003] When it is necessary to drain seepage in the tunnel under construction, the construction workers need to move the water pump to the seepage point, connect the water pump to the suction pipe of the pump, install the drainage pipe at the drainage outlet, and then carry out the seepage treatment. However, due to the different soil layer structures inside the tunnel, the impurities produced at the seepage point are different. For example, the seepage water may be mixed with soil, sand or gravel.

[0004] In existing drainage systems, the inlet of the pumping pipe is not equipped with any related filtration mechanism, or it is just a filter screen wrapped around the end of the pumping pipe. Therefore, when the inlet of the pumping pipe is placed into the seeping water pit, the suction force generated by the water pump will draw the mud, sand or gravel mixed in the water pit into the water pump, which can easily damage the water pump. Or, when the water pump is pumping for a long time, the filter screen can easily become clogged, which can affect the drainage system's ability to quickly discharge seeping water. Summary of the Invention

[0005] The purpose of this invention is to provide a drainage device for tunnel construction to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tunnel construction drainage device, comprising a mobile vehicle, a water pump box being installed on top of the mobile vehicle, a water pump being installed inside the water pump box, a drain pipe being installed on one side of the water pump box, and a suction pipe being installed on the other side of the water pump box, the inlet of the suction pipe being connected to a pumping pipe, and a self-cleaning filter mechanism being installed at the inlet of the pumping pipe, the self-cleaning filter mechanism being used to filter and clean the inlet of the pumping pipe to prevent gravel or soil mixed with tunnel construction seepage from clogging the water pump.

[0007] Preferably, the self-cleaning filter mechanism includes a connector, a filter cylinder, a filter screen, a rotating shaft, and a cam block. The connector is threaded onto the inlet of the water pump pipe, and a filter cylinder is located on the right side of the connector. A filter screen is detachably mounted on the right end face of the filter cylinder, and the filter screen is made of elastic material. A rotating shaft is rotatably inserted into the top of the filter cylinder, and the rotating shaft extends into the side of the filter screen. A motor is located above the filter cylinder, and the output shaft of the motor is connected to the rotating shaft. A cam block is located on the lower end face of the rotating shaft, and the cam block rotates and vibrates against the side of the filter screen.

[0008] Preferably, the filter self-cleaning mechanism further includes an external threaded ring, positioning rods, engaging rods, and engaging blocks. The front side of the external threaded ring has multiple positioning grooves, and its outer ring surface has multiple engaging grooves. Each engaging groove corresponds to each positioning groove. The outer ring surface of the filter screen is fixed with multiple positioning rods, and the multiple positioning rods are slidably engaged into the multiple positioning grooves. The top end of each positioning rod is elastically connected to an engaging rod, and the engaging rod and the positioning rod are arranged in a "7" shape. The multiple engaging rods are elastically engaged into the engaging grooves. Each engaging rod has an engaging block at its end, and each engaging block is located on the left side of the external threaded ring. The right side of the filter cylinder has a threaded hole, and the threaded hole is threadedly connected to the external threaded ring.

[0009] Preferably, the filter cylinder is provided with a sealing adjustment mechanism, which includes an arc-shaped sealing plate, an arc-shaped pull plate, a friction wheel, a rotating rod, a driving bevel gear, a driven bevel gear, and an electric push rod. Multiple filter holes are arrayed on the lower circumferential surface of the filter cylinder. The arc-shaped sealing plate slides against the filter holes inside the filter cylinder, and an arc-shaped pull plate is connected to one side of the top of the arc-shaped sealing plate. A friction wheel is rotatably mounted on the top of the filter cylinder via the rotating rod, and the friction wheel contacts the lower surface of the arc-shaped pull plate. A driving bevel gear is sleeved on the rotating shaft, and a driven bevel gear is mounted on the right end face of the rotating rod, with the driven bevel gear slidably meshing with the driving bevel gear. An electric push rod is fixed to the left side of the filter cylinder, and the telescopic rod of the electric push rod is connected to the left side of the friction wheel.

[0010] Preferably, the top of the filter cylinder has an arc-shaped groove, and an arc-shaped support bar is slidably disposed in the arc-shaped groove. The length of the arc-shaped support bar is less than the length of the arc-shaped groove, and the lower surface of the arc-shaped support bar is connected to the surface of the arc-shaped pull plate.

[0011] Preferably, the upper surface of the mobile vehicle is provided with a winding reel, and the upper surface of the winding reel is provided with a winding rod, which is located on the right side of the water pump box.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention incorporates a self-cleaning filter mechanism at the inlet of the pumping pipe. When the water pump operates, the suction force generated acts on the water pit through the pumping pipe, causing the seepage water in the pit to pass through the filter screen and enter the filter cylinder. At this time, the filter screen filters the mud, sand, or gravel mixed in the seepage water. The rotation of the cam block causes the elastic material filter screen to be squeezed and vibrated, thereby enabling the filter screen to quickly clean the mud and sand adhering to its outer surface under vibration. This allows the pumping pipe to quickly extract the seepage water generated during tunnel construction from the water pit, thus improving the drainage device's ability to quickly pump out seepage water generated during tunnel construction.

[0014] 2. This invention features a sealing adjustment mechanism located inside the lower part of the filter cylinder. The rotation of the rotating shaft drives the friction wheel to rotate via the meshing active and driven bevel gears. Since the friction wheel is in contact with the lower surface of the arc-shaped pull plate, its rotation drives the arc-shaped pull plate and arc-shaped sealing plate to rotate clockwise inside the filter cylinder. This causes the arc-shaped sealing plate to detach from the seals on multiple filter holes. Therefore, with continuous suction from the pumping pipe, the residual seepage water at the bottom of the water pit will continue to be pumped through the multiple filter holes on the lower ring of the filter cylinder. This facilitates the rapid drainage of seepage areas inside the tunnel during construction, preventing water accumulation and ensuring normal construction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the self-cleaning filter mechanism of the present invention;

[0017] Figure 3 This is a front sectional view of the filter cartridge of the present invention;

[0018] Figure 4 For the present invention Figure 3 Enlarged view of a portion of point A in the middle;

[0019] Figure 5 This is a cross-sectional view of the right side of the filter cartridge of the present invention;

[0020] Figure 6 This is an exploded view of the assembly of the external threaded ring and the filter screen plate of the present invention.

[0021] In the diagram: 1. Mobile vehicle; 2. Water pump box; 3. Pumping pipe; 4. Filter self-cleaning mechanism; 41. Connector; 42. Filter cylinder; 421. Filter hole; 422. Arc-shaped slide groove; 43. Filter screen; 44. Rotating shaft; 45. Cam block; 46. External threaded ring; 461. Positioning groove; 462. Engaging groove; 47. Positioning rod; 48. Engaging rod; 49. Engaging block; 5. Sealing adjustment mechanism; 51. Arc-shaped sealing plate; 52. Arc-shaped pull plate; 53. Friction wheel; 54. Rotating rod; 55. Driving bevel gear; 56. Driven bevel gear; 57. Electric push rod; 6. Arc-shaped support bar; 7. Winding reel; 8. Winding rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] like Figures 1 to 6As shown, the present invention provides a technical solution for a tunnel construction drainage device: It includes a mobile vehicle 1, a water pump box 2 mounted on top of the mobile vehicle 1, and a water pump installed inside the water pump box 2. A drain pipe is installed on one side of the water pump box 2, and a suction pipe is installed on the other side. The suction pipe is connected to a pumping pipe 3, and a self-cleaning filter mechanism 4 is installed at the inlet of the pumping pipe 3. The self-cleaning filter mechanism 4 is used to filter and clean the inlet of the pumping pipe 3, preventing the mixing of gravel or mud with seepage water during tunnel construction. Soil clogs the water pump. During operation, when timely drainage is needed at seepage points within the tunnel under construction, workers must move the water pump to the seepage point, connect the suction pipe 3 to the pump's suction pipe inlet, and install a drainage pipe at the drainage outlet for drainage. However, due to the varying soil structures within the tunnel, the seepage produces different impurities, such as mud, sand, or gravel mixed in with the seepage. The existing drainage system lacks any corresponding drainage system at the inlet of the suction pipe 3. The existing filtration mechanism is either incomplete or simply a filter screen wrapped around the end of the pumping pipe 3. Therefore, when the inlet of the pumping pipe 3 is placed into the seeping puddle, the suction force generated by the water pump will draw the mud, sand, or gravel mixed in the puddle into the pump, potentially damaging it. Alternatively, prolonged pumping can clog the filter screen, hindering the drainage system's ability to quickly remove seepage. Therefore, this invention provides a self-cleaning filter mechanism 4 at the inlet of the pumping pipe 3. Upon reaching the seepage pit, the self-cleaning filter 4 is simultaneously placed into the seepage pit. When the water pump draws water through the pumping pipe 3, the self-cleaning filter 4 installed at the inlet of the pumping pipe 3 can filter the mud, sand, or gravel in the seepage pit. At the same time, the self-cleaning filter 4 can also clean the mud and sand that accumulate and adhere to the inlet of the pumping pipe 3, preventing the mud and sand from clogging the inlet of the pumping pipe 3. This improves the drainage device's ability to quickly discharge seepage from the tunnel under construction.

[0025] In one embodiment of the present invention, the self-cleaning filter mechanism 4 includes a connector 41, a filter cylinder 42, a filter screen plate 43, a rotating shaft 44, and a cam block 45. The connector 41 is threadedly connected to the inlet of the water pump pipe 3, and the filter cylinder 42 is disposed on the right side of the connector 41. The filter screen plate 43 is detachably disposed on the right end face of the filter cylinder 42, and the filter screen plate 43 is provided with an elastic material. The rotating shaft 44 is rotatably inserted into the upper part of the filter cylinder 42, and the rotating shaft 44 extends into the side of the filter screen plate 43. A motor is disposed above the filter cylinder 42, and the output shaft of the motor is connected to the rotating shaft 44. A cam block 45 is provided on the lower end face, and the cam block 45 rotates and vibrates against the side of the filter screen plate 43. During operation, when the inlet of the water pump 3 is placed into the water pit at the seepage point, the filter cylinder 42 installed at the inlet of the water pump 3 will be simultaneously inserted into the water pit. When the water pump works, the suction force generated acts on the water pit through the water pump 3, and the seepage water in the water pit will enter the filter cylinder 42 through the filter screen plate 43. At this time, the filter screen plate 43 will filter the mud, sand or gravel mixed in the seepage water. Since the filter screen plate 43 is detachably installed on the end face of the filter cylinder 42, the construction personnel can adjust the filter screen plate according to the soil layer of the tunnel to filter different sizes of filter cylinders. The filter screen plate 43 with a mesh is installed on the right end face of the filter cylinder 42. For example, when the soil layer has fine silt, the mesh size of the filter screen plate 43 needs to be smaller. If the soil layer is a gravel layer, the filter screen plate 43 with a slightly larger mesh size can be replaced. This allows for rapid drainage of seepage points in the construction tunnel for different soil layers. When the pumping pipe 3 continuously pumps water, the filtered silt will accumulate and adhere to the outer surface of the filter screen plate 43 due to the suction force. At this time, the PLC control system will control the motor above the filter cylinder 42 to work. The output shaft of the motor will drive the cam block 45 to rotate through the rotating shaft 44. The rotation of the cam block 45 will cause it to spring. The filter screen 43 made of a hygienic material is squeezed and vibrated, which allows the filter screen 43 to quickly clean the mud and sand adhering to its outer surface under vibration. This allows the water pumping pipe 3 to quickly pump out the seepage water generated during tunnel construction from the water pit, thereby improving the drainage device's ability to quickly pump out seepage water generated during tunnel construction. The filter cylinder 42 is connected to the end of the water pumping pipe 3 by a connector 41. After the seepage water in the water pit is pumped out, the construction personnel disconnect the connector 41 from the opening of the water pumping pipe 3, and then coil the water pumping pipe 3 around the mobile vehicle 1, so that the drainage device can be quickly moved away from the site.

[0026] In one embodiment of the present invention, the filter self-cleaning mechanism 4 further includes an external threaded ring 46, a positioning rod 47, a locking rod 48, and a locking block 49. The front side of the external threaded ring 46 has multiple positioning grooves 461, and its outer ring surface has multiple locking grooves 462. Each locking groove 462 corresponds to each positioning groove 461. Multiple positioning rods 47 are fixed to the outer ring surface of the filter screen plate 43, and the multiple positioning rods 47 are slidably engaged into the multiple positioning grooves 461. The top end of each positioning rod 47 is elastically connected to a locking rod 48, and the locking rod 48 and the positioning rod 47 form a "7" shape. The filter cylinder 42 is configured with a U-shaped structure. Multiple locking rods 48 are elastically engaged into locking grooves 462. Each locking rod 48 has a locking block 49 at its end, and each locking block 49 is located on the left side of the external threaded ring 46. A threaded hole is provided on the right side of the filter cylinder 42, and the external threaded ring 46 is threaded into the threaded hole. During operation, when the filter screen plate 43 needs to be installed onto the right end face of the filter cylinder 42, the operator first engages multiple positioning rods 47 on the outer ring surface of the filter screen plate 43 into the multiple positioning grooves 461 on the right side of the external threaded ring 46, and then moves the locking rods 48 to engage them. Rods 48 are sequentially inserted into multiple engaging slots 462. At this time, the engaging block 49 on the left end face of the engaging rod 48 will be located on the left side of the external threaded ring 46. Then, the construction worker holds the handle on the outer side of the external threaded ring 46 and aligns the external threaded ring 46 with the threaded groove on the right side of the filter cylinder 42. Then, the external threaded ring 46 is rotated continuously so that it can drive the filter screen plate 43 to be installed on the right side of the filter cylinder 42. At this time, multiple engaging rods 48 will be located at the threaded connection between the external threaded ring 46 and the filter cylinder 42, and multiple engaging blocks 49 will be blocked by the threaded external threaded ring 46, thus facilitating... This ensures the safe fixation of the filter screen plate 43 without causing it to detach or fall off under the vibration and compression of the cam block 45, thus enabling safe and rapid filtration. When the filter screen plate 43 needs to be replaced, the operator removes the external threaded ring 46 from the right end face of the filter cylinder 42, and then pulls the locking rod 48 and positioning rod 47 out of the locking groove 462 and positioning groove 461 in sequence, making it easier to remove the filter screen plate 43 from the external threaded ring 46. The new filter screen plate 43 is then installed onto the right side of the filter cylinder 42 in the same manner as described above through the external threaded ring 46.

[0027] In one embodiment of the present invention, a sealing adjustment mechanism 5 is provided inside the filter cylinder 42. The sealing adjustment mechanism 5 includes an arc-shaped sealing plate 51, an arc-shaped pull plate 52, a friction wheel 53, a rotating rod 54, a driving bevel gear 55, a driven bevel gear 56, and an electric push rod 57. Multiple filter holes 421 are arrayed on the lower circumferential surface of the filter cylinder 42. The arc-shaped sealing plate 51 slides and fits above the filter holes 421 inside the filter cylinder 42, and an arc-shaped pull plate 52 is connected to one side of the top of the arc-shaped sealing plate 51. A friction wheel 53 is rotatably mounted on the top of the filter cylinder 42 via the rotating rod 54. The friction wheel 53 contacts the lower surface of the arc-shaped pull plate 52. A drive bevel gear 55 is sleeved on the rotating shaft 44. A driven bevel gear 56 is provided on the right end face of the rotating rod 54, and the driven bevel gear 56 slides and meshes with the drive bevel gear 55. An electric push rod 57 is fixed to the left side of the filter cylinder 42, and the telescopic rod of the electric push rod 57 is connected to the left side of the friction wheel 53. During operation, when the seepage pit is reduced to a small amount of water by the pumping pipe 3, the construction personnel can control the telescopic rod of the electric push rod 57 to extend through the PLC control system, allowing it to pass through the friction wheel 53, the driven bevel gear 56, and the rotating shaft 44. The driving bevel gear 55 meshes with the rotating shaft 44, so the rotation of the shaft rod 44 will drive the friction wheel 53 to rotate through the meshing driving bevel gear 55 and driven bevel gear 56. Since the friction wheel 53 is in contact with the lower surface of the arc-shaped pull plate 52, the rotation of the friction wheel 53 will drive the arc-shaped pull plate 52 and the arc-shaped sealing plate 51 to rotate clockwise inside the filter cylinder 42, thereby causing the arc-shaped sealing plate 51 to disengage from the seal on the multiple filter holes 421. Therefore, under the continuous suction of the water pumping pipe 3, the seepage water remaining at the bottom of the water pit will continue to be suctioned through the multiple filter holes 421 opened on the lower ring surface of the filter cylinder 42, thus facilitating the suction operation. The seepage inside the tunnel under construction is quickly drained to prevent water accumulation and disruption to normal construction. Simultaneously, the rotation of the cam block 45 vibrates the filter screen 43, causing the filter cylinder 42 to vibrate as well, effectively removing accumulated mud and sand from the lower surface of the filter cylinder 42. Once the seepage below the filter cylinder 42 is drained, the motor is reversed, causing the friction wheel 53 to rotate in the opposite direction, driving the arc-shaped pull plate 52 to rotate counterclockwise inside the filter cylinder 42. This causes the arc-shaped sealing plate 51 to continue sealing the filter holes 421 on the lower surface of the filter cylinder 42.

[0028] In one embodiment of the present invention, an arc-shaped groove 422 is provided inside the top of the filter cylinder 42, and an arc-shaped support strip 6 is slidably disposed in the arc-shaped groove 422. The length of the arc-shaped support strip 6 is less than the length of the arc-shaped groove 422, and the lower surface of the arc-shaped support strip 6 is connected to the surface of the arc-shaped pull plate 52. During operation, when the arc-shaped pull plate 52 slides clockwise or counterclockwise inside the filter cylinder 42, the arc-shaped support strip 6 disposed in the arc-shaped groove 422 can support and limit the arc-shaped pull plate 52, preventing the arc-shaped support strip 6 from falling off inside the filter cylinder 42.

[0029] As one embodiment of the present invention, the upper surface of the mobile vehicle 1 is provided with a winding reel 7, and the upper surface of the winding reel 7 is provided with a winding rod 8, which is located on the right side of the water pump box 2; during operation, the winding rod 8 is used to coil and store the used water pump pipe 3.

[0030] Working Principle: When timely drainage of seepage occurs within the tunnel under construction, workers move a water pump to the seepage site. A suction pipe 3 is connected to the pump's suction pipe, and a drain pipe is installed at the drainage outlet. When the suction pipe 3 is inserted into the seepage pit, the filter cartridge 42 installed at the suction pipe 3 is simultaneously inserted into the pit. When the pump operates, the suction force generated acts on the pit through the suction pipe 3, drawing seepage water through the filter screen 43 into the filter cartridge 42. The filter screen 43 filters out the mud, sand, or gravel mixed in the seepage water. As the suction pipe 3 continues to advance... During pumping operations, the filtered mud and sand will accumulate and adhere to the outer surface of the filter screen plate 43 due to the suction force. At this time, the PLC control system will control the motor above the filter cylinder 42 to work. The output shaft of the motor will drive the cam block 45 to rotate through the rotating shaft rod 44. The rotation of the cam block 45 will squeeze and vibrate the elastic material filter screen plate 43, thereby enabling the filter screen plate 43 to quickly clean the mud and sand adhering to its outer surface under vibration. This allows the pumping pipe 3 to quickly pump out the seepage water generated by the tunnel construction in the water pit, thereby improving the drainage device's ability to quickly pump out the seepage water generated by the tunnel construction.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel construction drainage device comprising a mobile vehicle (1), characterized in that, The mobile vehicle (1) is provided with a water pump box (2) above, and a water pump is arranged in the water pump box (2), one side of the water pump box (2) is provided with a drain pipe, and the other side of the water pump box (2) is provided with a water suction pipe, the pipe opening of the water suction pipe is connected with a water suction pipe (3), and the pipe opening of the water suction pipe (3) is provided with a filtering self-cleaning mechanism (4), the filtering self-cleaning mechanism (4) is used for filtering and cleaning the pipe opening of the water suction pipe (3), and prevents the mixed gravel or soil of the tunnel construction water seepage from being blocked into the water pump; The filtering self-cleaning mechanism (4) comprises a connecting head (41), a filter cylinder (42), a filter screen plate (43), a rotating shaft rod (44) and a cam block (45), the connecting head (41) is screwed on the pipe opening of the water suction pipe (3), and the right side of the connecting head (41) is provided with the filter cylinder (42), the right side of the filter cylinder (42) is detachably provided with the filter screen plate (43), and the filter screen plate (43) is made of elastic material, the filter cylinder (42) is rotatably inserted with the rotating shaft rod (44) above, and the rotating shaft rod (44) extends into the side surface of the filter screen plate (43), a motor is arranged above the filter cylinder (42), and the output shaft of the motor is connected with the rotating shaft rod (44), and the lower end surface of the rotating shaft rod (44) is provided with the cam block (45), and the cam block (45) is rotatably vibrated to the side surface of the filter screen plate (43); The filter cylinder (42) is provided with a sealing adjusting mechanism (5), the sealing adjusting mechanism (5) comprises an arc-shaped sealing plate (51), an arc-shaped pull plate (52), a friction wheel (53), a rotating rod (54), a driving bevel gear (55), a driven bevel gear (56) and an electric push rod (57), a plurality of filter holes (421) are arrayed and formed on the lower circumferential surface of the filter cylinder (42), the arc-shaped sealing plate (51) is slidably attached above the filter holes (421) in the filter cylinder (42), and one side of the top end of the arc-shaped sealing plate (51) is connected with the arc-shaped pull plate (52), the top end of the filter cylinder (42) is rotatably provided with the friction wheel (53) through the rotating rod (54), and the friction wheel (53) is in contact with the lower surface of the arc-shaped pull plate (52), the driving bevel gear (55) is sleeved on the rotating shaft rod (44), the right side end surface of the rotating rod (54) is provided with the driven bevel gear (56), and the driven bevel gear (56) is slidably engaged with the driving bevel gear (55), and the left side of the filter cylinder (42) is fixed with the electric push rod (57), and the telescopic rod of the electric push rod (57) is connected with the left side surface of the friction wheel (53).

2. A tunnel construction drainage device according to claim 1, characterised in that: The filter self-cleaning mechanism (4) further comprises an external thread ring (46), a positioning rod (47), a clamping rod (48) and a clamping block (49), a plurality of positioning grooves (461) are formed on the front side of the external thread ring (46), and a plurality of clamping grooves (462) are formed on the outer ring surface of the external thread ring (46), each clamping groove (462) corresponds to each positioning groove (461), a plurality of positioning rods (47) are fixed on the outer ring surface of the filter screen plate (43), and the plurality of positioning rods (47) are respectively slidingly clamped into the plurality of positioning grooves (461), the top end of each positioning rod (47) is elastically connected with a clamping rod (48), the clamping rod (48) and the positioning rod (47) are arranged in a "7" shape, the plurality of clamping rods (48) are respectively elastically clamped into the clamping grooves (462), and the end of each clamping rod (48) is provided with a clamping block (49), each clamping block (49) is located on the left side of the external thread ring (46), and the right side of the filter cartridge (42) is provided with a threaded hole, and the threaded hole is threadedly connected with the external thread ring (46).

3. The tunnel construction drainage device according to claim 1, wherein: The top end of the filter cartridge (42) is internally provided with an arc-shaped sliding groove (422), and an arc-shaped supporting strip (6) is slidingly arranged in the arc-shaped sliding groove (422), the length of the arc-shaped supporting strip (6) is less than the length of the arc-shaped sliding groove (422), and the lower surface of the arc-shaped supporting strip (6) is connected to the surface of the arc-shaped pull plate (52).

4. The tunnel construction drainage device of claim 1, wherein: The upper surface of the mobile trolley (1) is provided with a winding disc (7), and the upper surface of the winding disc (7) is provided with a winding rod (8), and the winding rod (8) is located on the right side of the water pump box (2).

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