Tunneling device for subway construction

Abstract

The invention discloses a tunneling device for subway construction, which is characterized in that a base is connected with a horizontal bucket in an up-down sliding manner, the bottom end of the bucket is fixedly provided with a plurality of vertical first compression springs, the bottom ends of the first compression springs are respectively fixed with the base, and the front and rear parts of the inner wall of the bucket are respectively fixedly provided with a horizontal support table; a horizontal inner supporting cylinder is rotationally connected to the upper portion of the base in the front-back direction, and an outer supporting cylinder is coaxially fixed to the outer wall of the inner supporting cylinder. By arranging the conveying belt, disintegrating slag can be conveyed in an auxiliary mode, water can be discharged and can be conveniently collected by the lower collecting groove, by arranging an elastic filter screen, a through groove, a sealing plug, a liquid storage cavity, a third compression spring, a through opening, a through hole and an upper collecting groove, the discharged water can be collected in an auxiliary mode, and therefore the water collecting efficiency is improved; the water content of the disintegrating slag is reduced, the disintegrating slag is convenient to transport, the transportation cost is reduced, and the collected water can be recycled by the electric conveying device and the electric spraying device.

Description

Technical Field

[0001] This invention relates to the field of subway construction technology, and in particular to a tunneling device for subway construction. Background Technology

[0002] Tunneling equipment is a commonly used construction tool in subway construction, which can greatly improve tunneling speed and efficiency and shorten the construction period. However, existing tunneling equipment often produces excavated debris containing a large amount of moisture. There are many reasons for this phenomenon, such as the debris being close to underground water veins, resulting in high water content; or the temperature rising due to friction between the tunneling equipment and rock strata during tunneling; or the use of large amounts of water for dust removal. All of these can lead to excessive moisture content in the debris. Increased moisture content increases the weight and viscosity of the debris, which not only increases the difficulty and cost of transportation but also makes it prone to leakage during transportation, thus polluting the transportation channel environment and hindering construction. This highlights the shortcomings of existing technology. Summary of the Invention

[0003] The purpose of this invention is to provide a tunneling device for subway construction to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A tunneling device for subway construction includes a base, a bucket, a first compression spring, a support platform, an inner support cylinder, an outer support cylinder, a guide groove, a digging plate, a digging claw, an inner guide wheel, an outer guide wheel, a second compression spring, a support rail, an electric sprinkler system, an upper speed-regulating motor, an external gear, a gear ring, an upper support roller, a lower support roller, a lower speed-regulating motor, a conveyor belt, a lower collection trough, a drainage cylinder, a water tank, and an electric conveying device. The base is slidably connected to a horizontal bucket. Multiple vertical first compression springs are fixed to the bottom of the bucket, and the bottom of each first compression spring is fixed to the base. The inner wall of the bucket has two... Each part is fixed with a horizontal support platform. A horizontal inner support cylinder is rotatably connected to the upper part of the base in the front-rear direction. An outer support cylinder is coaxially fixed to the outer wall of the inner support cylinder. Multiple radial guide grooves are fixed to the outer support cylinder and the inner support cylinder at equal angles around their circumferences. Multiple digging plates are radially slidably connected to the outer support cylinder through these guide grooves. A digging claw is fixed to the end of each digging plate away from the outer support cylinder. An inner guide wheel, an outer guide wheel, and a second compression spring are fixed to the front and rear parts of each digging plate. Each outer guide wheel and the second compression spring are arranged radially relative to the outer support cylinder. The spring is fixed to the outer support cylinder at its radial end near the outer support cylinder. Each inner guide wheel is centrifugally positioned relative to the outer support cylinder. Arc-shaped support rails are fixed to the front and rear ends of the top of the base. Electric spraying devices are fixed to the front and rear ends of the upper part of the base. A horizontal upper speed-regulating motor is fixed to the front of the base in the front-rear direction. An external gear is coaxially fixed to the shaft of the upper speed-regulating motor. A gear ring is coaxially fixed to the inner support cylinder. The external gear meshes with the gear ring. Multiple horizontal upper and lower support rollers are rotatably connected to the lower right part of the bucket in the front-rear direction. All upper support rollers are in the same horizontal plane. The lower support rollers are on the same horizontal plane and are located below the upper support rollers. A horizontal lower speed-regulating motor is fixed in the front-rear direction of the bucket. The shaft of the lower speed-regulating motor is coaxially fixed with the upper support roller at the far right of the bucket. Each of the upper and lower support rollers is connected to a conveyor belt made of permeable material. A horizontal lower collection trough is fixed at the lower right of the bucket and is located between the upper and lower support rollers. The lower collection trough is fixedly connected to a horizontal drainage cylinder and is located in the middle of the conveyor belt. A water tank and an electric conveying device are fixed at the bottom of the base.

[0005] Based on the above technical solution, the outer support cylinder and the inner support cylinder are provided with multiple radial liquid storage cavities at equal angles around their circumferences. Each liquid storage cavity and the outer support cylinder are connected by a through groove. Each through groove and the outer support cylinder are jointly enclosed and fixed with an arc-shaped elastic filter screen. Each liquid storage cavity has a receiving cylinder fixed to its inner wall near the end face of the outer support cylinder. Each receiving cylinder is slidably connected with a sealing plug. Each receiving cylinder has a through opening near the through groove. The sliding connection direction between each sealing plug and the liquid storage cavity is centripetal relative to the outer support cylinder. Each sealing plug has a No. 3 compression spring fixed to its end face near the inner support cylinder. The end of each No. 3 compression spring is fixed to each receiving cylinder. Each sealing plug is sealed and fitted with the through groove under the elastic repulsive force of each No. 3 compression spring. Each liquid storage cavity and the inner support cylinder are connected by multiple through holes. A horizontal semi-cylindrical shell-shaped upper collection trough is fixed to the upper part of the base. A horizontal drain pipe is fixedly connected to the front end of the upper collection trough. The upper collection trough and the inner support cylinder are interlocked.

[0006] Based on the above technical solution, each of the digging plates is slidably connected to a scraper and a transmission plate. The sliding direction of each scraper and transmission plate is parallel to the sliding direction of the digging plate. A transmission shaft is rotatably connected to each of the digging plates in the front-rear direction. A transmission gear is coaxially fixed to each of the transmission shafts. A rack is fixed to the adjacent end faces of each scraper and transmission plate. The rack meshes with the transmission gear. The scraper and transmission plate are centrally symmetrically connected via the meshing of the rack and transmission gear compared to the transmission shaft. A [missing information - likely a device or mechanism] is fixed to the end of each transmission plate near the outer support cylinder. Each of the aforementioned optical rods is slidably and sealed to the excavation plate. The sliding connection direction between the optical rod and the excavation plate is parallel to the sliding connection direction of the transmission plate. Each transmission plate is fixed with a transmission rod via the optical rod. Each transmission rod has a secondary guide wheel fixed at both its front and rear ends. Each secondary guide wheel is centrifugally positioned relative to the outer support cylinder. Each transmission rod is fixed with a tension spring. The direction of the tension spring is parallel to the direction of the transmission rod. The ends of each tension spring are fixed to the excavation plate. Under the elastic tension of the tension spring, the transmission plate tends to slide away from the outer support cylinder.

[0007] Based on the above technical solution, when the upper speed-regulating motor is energized and rotates, the inner support cylinder can rotate through the meshing of the external gear and the gear ring. When the inner support cylinder rotates, it can drive the digging plate to move circumferentially. During the circumferential movement of the digging plate, each outer guide wheel can intermittently roll and rub against the support rail. During the circumferential movement of the digging plate, each inner guide wheel and the secondary guide wheel can intermittently roll and rub against the support platform. When the inner guide wheel and the secondary guide wheel roll and rub against the support platform, the first compression spring and the second compression spring can be elastically compressed and the tension spring can be elastically stretched. When the lower speed-regulating motor is energized and rotates, it can drive the conveyor belt to rotate through the upper support roller and the lower support roller. The drainage cylinder and the drainage pipe are connected to the water tank through external pipes. The electric conveying device is connected to both the water tank and the electric spraying device. The electric spraying device, the upper speed-regulating motor, the lower speed-regulating motor, and the electric conveying device are connected to an external controller and power supply.

[0008] Compared with the prior art, the present invention has the following advantages: the present invention can rotate the inner support cylinder and the outer support cylinder by controlling the rotation of the upper speed-regulating motor, and can make the digging plate and digging claw move circumferentially, and can make the outer guide wheel roll and rub against the support rail, thereby digging the rock layer and pushing the generated debris to the right.

[0009] The circumferential movement of the digging plate allows the outer guide wheel and the secondary guide wheel to roll and rub against the support platform. This allows the digging plate to retract into the guide groove, squeezing the debris and expelling water. The rolling friction between the secondary guide wheel and the support platform indirectly causes the scraper to extend and contact the bucket and conveyor belt, thus pushing the debris more thoroughly and reducing leakage.

[0010] By setting up a conveyor belt, not only can the slag be transported in an auxiliary manner, but water can also be discharged for easy collection in the lower collection tank. By setting up an elastic filter, through groove, sealing plug, liquid storage chamber, No. 3 compression spring, through port, through hole and upper collection tank, the discharged water can also be collected in an auxiliary manner, thereby speeding up the water collection efficiency, reducing the water content of the slag, facilitating the transportation of the slag, reducing transportation costs, and the collected water can be reused by electric conveying device and electric spraying device, thereby saving water resources and reducing the pollution of the discharged water to the external environment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the isometric structure of the present invention.

[0012] Figure 2 This is a schematic diagram of the fit between the external gear and the gear ring of the present invention.

[0013] Figure 3This is a front cross-sectional view of the bucket, conveyor belt, lower collection trough, upper support roller, and lower support roller of the present invention.

[0014] Figure 4 This is a front cross-sectional view of the inner support cylinder, outer support cylinder, and excavation plate of the present invention.

[0015] Figure 5 This is a partially enlarged structural diagram of point A in the present invention.

[0016] In the diagram: 1. Base; 2. Bucket; 3. Compression Spring No. 1; 4. Support Platform; 5. Inner Support Cylinder; 6. Outer Support Cylinder; 7. Guide Groove; 8. Digging Plate; 9. Digging Claw; 10. Inner Guide Wheel; 11. Outer Guide Wheel; 12. Compression Spring No. 2; 13. Support Rail; 14. Electric Sprinkler Device; 15. Upper Speed-Regulating Motor; 16. External Gear; 17. Gear Ring; 18. Upper Support Roller; 19. Lower Support Roller; 20. Lower Speed-Regulating Motor; 21. Conveyor Belt; 22. 23. Lower collection tank, 24. Drainage cylinder, 25. Water tank, 26. Electric conveying device, 27. Liquid storage chamber, 28. Through groove, 29. Elastic filter screen, 30. Receiving cylinder, 31. Sealing plug, 32. Through port, 33. No. 3 compression spring, 34. Through hole, 35. Upper collection tank, 36. Drainage pipe, 37. Scraper, 38. Transmission plate, 39. Secondary guide wheel, 40. Transmission shaft, 41. Transmission gear, 42. Rack, 43. Polished rod, 44. Transmission rod, 45. Tension spring. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figures 1-5As shown, a tunneling device for subway construction includes a base 1, a bucket 2, a first compression spring 3, a support platform 4, an inner support cylinder 5, an outer support cylinder 6, a guide groove 7, a digging plate 8, a digging claw 9, an inner guide wheel 10, an outer guide wheel 11, a second compression spring 12, a support rail 13, an electric sprinkler device 14, an upper speed-regulating motor 15, an external gear 16, a gear ring 17, an upper support roller 18, a lower support roller 19, a lower speed-regulating motor 20, a conveyor belt 21, a lower collection trough 22, a drainage cylinder 23, a water tank 24, and an electric conveying device 25. The base 1 is slidably connected to a horizontal bucket 2. Multiple vertical first compression springs 3 are fixed to the bottom of the bucket 2, and the bottom of each first compression spring 3 is fixed to the base 1. The inner wall of the bucket 2... Each of the last two parts is fixed with a horizontal support platform 4. A horizontal inner support cylinder 5 is rotatably connected to the upper part of the base 1 in the front-back direction. An outer support cylinder 6 is coaxially fixed to the outer wall of the inner support cylinder 5. Multiple radial guide grooves 7 are fixed to the outer support cylinder 6 and the inner support cylinder 5 at equal angles around their circumferences. Multiple digging plates 8 are radially slidably connected to the outer support cylinder 6 through each guide groove 7. Each digging plate 8 has a digging claw 9 fixed to its end away from the outer support cylinder 6. The digging claw 9 facilitates the excavation and crushing of the rock strata. Each digging plate 8 has an inner guide wheel 10, an outer guide wheel 11, and a second compression spring 12 fixed to its front and rear ends. Each outer guide wheel 11 and second compression spring 12 are arranged radially relative to the outer support cylinder 6. The spring 12 is fixed to the outer support cylinder 6 at its radial end near the outer support cylinder 6. Each of the inner guide wheels 10 is centrifugally arranged relative to the outer support cylinder 6. Arc-shaped support rails 13 are fixed to the front and rear ends of the top of the base 1. Electric spraying devices 14 are fixed to the front and rear ends of the upper part of the base 1. The spraying devices 14 can wet the digging plate 8, digging claw 9 and rock strata, thereby cooling the digging plate 8 and digging claw 9 to prevent damage. The rock strata are easier to dig after being wetted. A horizontal upper speed-regulating motor 15 is fixed to the front of the base 1 in the front-rear direction. An external gear 16 is coaxially fixed to the shaft of the upper speed-regulating motor 15. A gear ring 17 is coaxially fixed to the inner support cylinder 5. The external gear 16 meshes with the gear ring 17. The lower right part of the bucket 2 Multiple horizontal upper support rollers 18 and lower support rollers 19 are rotatably connected in the front-to-back direction. All upper support rollers 18 are on the same horizontal plane, allowing for better lifting of the debris at the top of the conveyor belt 21 across the belt, facilitating better compression and dewatering. All lower support rollers 19 are on the same horizontal plane and located below the upper support rollers 18. A horizontal downward-regulating motor 20 is fixed to the front end of the bucket 2 in the front-to-back direction. The shaft of the downward-regulating motor 20 is coaxially fixed with the rightmost upper support roller 18 of the bucket 2. All upper support rollers 18 and lower support rollers 19 are connected to the conveyor belt 21, which is made of permeable material. A horizontal lower collection trough 22 is fixed to the lower right part of the bucket 2.The lower collection trough 22 is located between the upper support roller 18 and the lower support roller 19, allowing water separating from the slag to be collected by the lower collection trough 22 after passing through the upper part of the conveyor belt 21, thus preventing this water from being absorbed again by the bottom of the conveyor belt 21. The lower collection trough 22 is fixedly connected to a horizontal drainage cylinder 23. The lower collection trough 22 is located in the middle of the conveyor belt 21. A water tank 24 and an electric conveying device 25 are fixed to the bottom of the base 1.

[0019] The outer support cylinder 6 and the inner support cylinder 5 are provided with multiple radial liquid storage cavities 26 at equal angles around their circumferences. Each liquid storage cavity 26 and the outer support cylinder 6 are connected by a through groove 27. Each through groove 27 and the outer support cylinder 6 are jointly closed and fixed with an arc-shaped elastic filter 28. The arc-shaped elastic filter 28 can be more easily squeezed and deformed, thereby facilitating the pushing of the sealing plug 30 through the elastic filter 28. A receiving cylinder 29 is fixed to the inner wall of each liquid storage cavity 26 near the end face of the outer support cylinder 6. Each receiving cylinder 29 is slidably connected to the sealing plug 30. The portion of each receiving cylinder 29 near the through groove 27 is provided with a through opening 31, thereby facilitating the drainage of water entering the receiving cylinder 29 into the liquid storage cavity 26. The sliding connection between each sealing plug 30 and the liquid storage cavity 26 is... The dynamic connection direction is centripetal relative to the outer support cylinder 6. Each of the sealing plugs 30 has a No. 3 compression spring 32 fixed to its end face near the inner support cylinder 5. The end of each of the No. 3 compression springs 32 is fixed to each receiving cylinder 29. Each of the sealing plugs 30 is sealed and fitted to the through groove 27 under the elastic repulsive force of each No. 3 compression spring 32. Each of the liquid storage chambers 26 and the inner support cylinder 5 are connected by multiple through holes 33. A horizontal semi-cylindrical shell-shaped upper collection groove 34 is fixed on the upper part of the base 1. The semi-cylindrical shell-shaped upper collection groove 34 can be closer to the inner support cylinder 5, so as to facilitate the collection of water discharged from the through hole 33. A horizontal drain pipe 35 is fixedly connected to the front end of the upper collection groove 34. The upper collection groove 34 is interlocked with the inner support cylinder 5.

[0020] Each of the digging plates 8 is slidably connected to a scraper 36 and a transmission plate 37. The sliding direction of each scraper 36 and transmission plate 37 is parallel to the sliding direction of the digging plate 8. Each digging plate 8 is rotatably connected to a transmission shaft 39 in the front-rear direction. Each transmission shaft 39 is coaxially fixed with a transmission gear 40. A rack 41 is fixed to the adjacent end face of each scraper 36 and transmission plate 37. The rack 41 meshes with the transmission gear 40. The scraper 36 and transmission plate 37 are centrally symmetrically connected to the transmission shaft 39 through the meshing of the rack 41 and the transmission gear 40. Each transmission plate 37 is fixed with a polished rod 42 near the end of the outer support cylinder 6. Each polished rod 42 is slidably and sealingly connected to the digging plate 8. The sliding connection direction of the polished rod 42 with the digging plate 8 is parallel to that of the transmission plate 37. The sliding connection directions of the 37 are parallel. Each of the transmission plates 37 is fixed with a transmission rod 43 by each smooth rod 42. Each of the transmission rods 43 has a secondary guide wheel 38 fixed at both the front and rear ends. Each of the secondary guide wheels 38 is centrifugally arranged relative to the outer support cylinder 6. Each of the transmission rods 43 is fixed with a tension spring 44. The direction of the tension spring 44 is parallel to the direction of the transmission rod 43. The ends of each tension spring 44 are fixed to the digging plate 8. Under the elastic tension of the tension spring 44, the transmission plate 37 has a tendency to slide away from the outer support cylinder 6. Thus, the meshing of the rack 41 and the gear 40 makes the scraper 36 have a tendency to retract into the digging plate 8. This allows the scraper 36 to retract into the digging plate 8 and not contact the rock layer when the digging plate 8 is in contact with the rock layer, thereby avoiding wear caused by friction between the scraper 36 and the rock layer.

[0021] When the upper speed-regulating motor 15 is energized and rotates, the inner support cylinder 5 rotates through the meshing of the external gear 16 and the gear ring 17. The rotation of the inner support cylinder 5 drives the digging plate 8 to move circumferentially. During this circumferential movement, the outer guide wheels 11 and the support rail 13 undergo intermittent rolling friction, preventing the digging plate 8 from retracting into the guide groove 7. During the circumferential movement, the inner guide wheels 10 and the auxiliary guide wheels 38 undergo intermittent rolling friction with the support platform 4, allowing the support platform 4 to exert upward force on the inner guide wheels 10 and the auxiliary guide wheels 38. When the inner guide wheel 10 and the secondary guide wheel 38 roll and rub against the support platform 4, the first compression spring 3 and the second compression spring 12 are elastically compressed, and the tension spring 44 is elastically stretched. When the lower speed-regulating motor 20 is energized and rotates, it can drive the conveyor belt 21 to rotate through the upper support roller 18 and the lower support roller 19. The drain cylinder 23 and the drain pipe 35 are connected to the water tank 24 through external pipes. The electric conveying device 25 is connected to both the water tank 24 and the electric spraying device 14. The electric spraying device 14, the upper speed-regulating motor 15, the lower speed-regulating motor 20, and the electric conveying device 25 are connected to an external controller and power supply.

[0022] The working principle of this invention is as follows: During use, the device can be pushed from right to left towards the area to be excavated using an external moving device. Then, the upper speed-regulating motor 15 and the lower speed-regulating motor 20 are controlled to rotate. At this time, the inner support cylinder 5 and the outer support cylinder 6 begin to rotate counterclockwise (from the main viewing angle) under the meshing transmission of the outer gear 16 and the gear ring 17, while the conveyor belt 21 rotates clockwise (from the main viewing angle). When the digging plate 8 moves above the outer support cylinder 6, the outer guide wheel 11 rolls and rubs against the support rail 13. Therefore, when the digging claw 9 is excavating the rock strata, the digging plate 8 will not retract into the guide groove 7, thus facilitating the digging operation of the digging claw 9. The excavated debris falls into the bucket 2 and is pushed to the right by the digging plate 8 below the outer support cylinder 6. As the excavating plate 8 below the outer support cylinder 6 pushes the debris to the right, the debris falls onto the top of the conveyor belt 21. During this process, under the elastic repulsive force of the first compression spring 3, the bucket 2 moves closer to the outer support cylinder 6, allowing the inner guide wheel 10 and the secondary guide wheel 38 to roll and rub against the support platform 4, while the outer guide wheel 11 below the outer support cylinder 6 does not roll and rub against the support rail 13. Consequently, the excavating plate 8 below the outer support cylinder 6 is indirectly pushed by the support platform 4 and retracts along the guide groove 7, allowing the secondary guide wheel 38 to move closer to the outer support cylinder 6 relative to the excavating plate 8. This causes the transmission plate 37 to move closer to the outer support cylinder 6 relative to the excavating plate 8, thereby affecting the transmission gear 40 and rack 41. Under the action of transmission, the scraper 36 extends from the digging plate 8 and contacts the surfaces of the bucket 2 and the conveyor belt 21, thereby pushing the debris more fully to the right and reducing leakage. Under the elastic repulsive force of the compression spring 3, the bucket 2 drags the debris closer to the outer support cylinder 6, thereby squeezing the debris and expelling water. When the debris is squeezed, the elastic filter screen 28 is squeezed and deformed, thereby pushing the sealing plug 30 and releasing the seal between the sealing plug 30 and the through groove 27. Part of the discharged water will fall into the lower collection trough 22 through the conveyor belt 21 and further flow into the water tank 24 along the drain cylinder 23, while the other part of the water (the part that overflows from the top of the debris after being squeezed) can pass through the elastic filter screen 28. The filter screen 28 and the channel 27 enter the drain cylinder 23, and then further enter the storage chamber 26 through the opening 31 for temporary storage. As the outer support cylinder 6 rotates further, the debris will no longer be squeezed by the outer support cylinder 6 and the conveyor belt 21. At this time, the sealing plug 30 restores its sealing fit to the channel 27 under the elastic repulsive force of the compression spring 32, and at the same time, the elastic filter screen 28 returns to its original shape, thereby preventing the water temporarily stored in the storage chamber 26 from being discharged from the channel 27. As the outer support cylinder 6 rotates further, when the storage chamber 26 moves to the upper part of the outer support cylinder 6, the water in the storage chamber 26 can fall into the upper collection tank 34 through the through hole 33. The water falling into the upper collection tank 34 can then flow into the water tank 24 for storage through the drain pipe 35.The water in tank 24 can be transported by electric conveyor 25 to electric spraying device 14 for spraying, thus wetting the excavator plate 8, excavator claw 9, and rock strata, achieving water recycling. When the water in tank 24 is insufficient, it can be manually replenished.

[0023] The above description represents a preferred embodiment of the present invention. For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention, based on the teachings of the present invention, still fall within the protection scope of the present invention.

Claims

1. A tunneling device for subway construction, comprising a base (1), a bucket (2), a first compression spring (3), a support platform (4), an inner support cylinder (5), an outer support cylinder (6), a guide groove (7), a digging plate (8), a digging claw (9), an inner guide wheel (10), an outer guide wheel (11), a second compression spring (12), a support rail (13), an electric spraying device (14), an upper speed-regulating motor (15), an external gear (16), a gear ring (17), an upper support roller (18), a lower support roller (19), a lower speed-regulating motor (20), a conveyor belt (21), a lower collection trough (22), a drainage cylinder (23), a water tank (24), and an electric conveying device (25), characterized in that: The base (1) is slidably connected to a horizontal bucket (2). Multiple vertical compression springs (3) are fixed to the bottom of the bucket (2). The bottom of each compression spring (3) is fixed to the base (1). Horizontal support platforms (4) are fixed to the front and rear sides of the inner wall of the bucket (2). A horizontal inner support cylinder (5) is rotatably connected to the upper part of the base (1) in the front-rear direction. An outer support cylinder (6) is coaxially fixed to the outer wall of the inner support cylinder (5). Multiple radial guide grooves (7) are fixed to the outer support cylinder (6) and the inner support cylinder (5) at equal angles around their circumferences. Multiple digging plates (8) are radially slidably connected to the outer support cylinder (6) through each guide groove (7). The digging plates (8) are respectively fixed with digging claws (9) at the ends away from the outer support cylinder (6). Each digging plate (8) is fixed with an inner guide wheel (10), an outer guide wheel (11), and a second compression spring (12) at both the front and rear. Each outer guide wheel (11) and the second compression spring (12) are arranged centripetally relative to the outer support cylinder (6). The centripetal end of each second compression spring (12) near the outer support cylinder (6) is fixed to the outer support cylinder (6). Each inner guide wheel (10) is arranged centrifugally relative to the outer support cylinder (6). Each base (1) is fixed with an arc-shaped support rail (13) at both the front and rear of the top of the base (1). Each of the front and rear ends of the upper part of the base (1) is fixed with an electric sprayer. The base (1) of the shovel is equipped with a horizontally fixed upper speed-regulating motor (15) in the front-rear direction. The upper speed-regulating motor (15) is coaxially fixed with an external gear (16). The inner support cylinder (5) is coaxially fixed with a gear ring (17). The external gear (16) meshes with the gear ring (17). The bucket (2) is rotatably connected to multiple horizontal upper support rollers (18) and lower support rollers (19) in the front-rear direction at the lower right side. Each upper support roller (18) is in the same horizontal plane, and each lower support roller (19) is in the same horizontal plane. The lower support roller (19) is located below the upper support roller (18). The front end of the bucket (2) is fixed with a horizontally fixed upper speed-regulating motor (15) in the front-rear direction. The lower speed-regulating motor (20) has its shaft fixed to the upper support roller (18) at the far right of the bucket (2). Each upper support roller (18) and lower support roller (19) is connected to a conveyor belt (21). The conveyor belt (21) is made of a water-permeable material. A horizontal lower collection trough (22) is fixed to the lower right of the bucket (2). The lower collection trough (22) is located between the upper support roller (18) and the lower support roller (19). The lower collection trough (22) is fixedly connected to a horizontal drainage cylinder (23). The lower collection trough (22) is located in the middle of the conveyor belt (21). A water tank (24) and an electric conveyor device (25) are fixed to the bottom of the base (1).

2. The tunneling device for subway construction according to claim 1, characterized in that: The outer support cylinder (6) and the inner support cylinder (5) are provided with multiple radial liquid storage cavities (26) at equal angles around their circumferences. Each liquid storage cavity (26) and the outer support cylinder (6) are connected by a through groove (27). Each through groove (27) and the outer support cylinder (6) are jointly sealed and fixed with an arc-shaped elastic filter screen (28). Each liquid storage cavity (26) has a receiving cylinder (29) fixed to the end face of the inner wall near the outer support cylinder (6). Each receiving cylinder (29) is slidably connected with a sealing plug (30). Each receiving cylinder (29) has a through opening (31) near the through groove (27). The sliding connection direction between each sealing plug (30) and the liquid storage cavity (26) is relative to that of the outer support cylinder. (6) The sealing plugs (30) are arranged in a centripetal manner. Each sealing plug (30) is fixed with a No. 3 compression spring (32) near the end face of the inner support cylinder (5). The end of each No. 3 compression spring (32) is fixed to each receiving cylinder (29). Each sealing plug (30) is sealed and fitted with the through groove (27) under the elastic repulsive force of each No. 3 compression spring (32). Each liquid storage cavity (26) and the inner support cylinder (5) are connected by multiple through holes (33). A horizontal semi-cylindrical shell-shaped upper collection groove (34) is fixed on the upper part of the base (1). A horizontal drain pipe (35) is fixedly connected to the front end of the upper collection groove (34). The upper collection groove (34) and the inner support cylinder (5) are intermittently inserted.

3. The tunneling device for subway construction according to claim 2, characterized in that: Each of the digging plates (8) is slidably connected to a scraper (36) and a transmission plate (37). The sliding direction of each scraper (36) and transmission plate (37) is parallel to the sliding direction of the digging plate (8). Each of the digging plates (8) is rotatably connected to a transmission shaft (39) in the front-back direction. Each of the transmission shafts (39) is coaxially fixed with a transmission gear (40). The adjacent end faces of the scraper (36) and transmission plate (37) are respectively fixed with racks (41). The racks (41) mesh with the transmission gears (40). The scraper (36) and transmission plate (37) are centrally symmetrically connected to the transmission shafts (39) through the meshing of the racks (41) and transmission gears (40). Each of the transmission plates (37) is fixed with a polished rod (42) at the end near the outer support cylinder (6). Each of the aforementioned light rods (42) is sealed and slidably connected to the excavation plate (8). The sliding connection direction between the light rod (42) and the excavation plate (8) is parallel to the sliding connection direction of the transmission plate (37). Each of the transmission plates (37) is fixed with a transmission rod (43) through each light rod (42). Each of the transmission rods (43) has a secondary guide wheel (38) fixed at both the front and rear ends. Each of the secondary guide wheels (38) is centrifugally arranged relative to the outer support cylinder (6). Each of the transmission rods (43) is fixed with a tension spring (44). The direction of the tension spring (44) is parallel to the direction of the transmission rod (43). The ends of each tension spring (44) are fixed to the excavation plate (8). Under the elastic tension of the tension spring (44), the transmission plate (37) tends to slide away from the outer support cylinder (6).

4. The tunneling device for subway construction according to claim 3, characterized in that: When the upper speed-regulating motor (15) is energized and rotates, the inner support cylinder (5) can rotate through the meshing of the external gear (16) and the gear ring (17). When the inner support cylinder (5) rotates, it can drive the digging plate (8) to move circumferentially. During the circumferential movement of the digging plate (8), each outer guide wheel (11) can intermittently roll and rub against the support rail (13). During the circumferential movement of the digging plate (8), each inner guide wheel (10) and the auxiliary guide wheel (38) can intermittently roll and rub against the support platform (4). When the inner guide wheel (10) and the auxiliary guide wheel (38) roll and rub against the support platform (4), it can cause... Compression spring 1 (3) and compression spring 2 (12) generate elastic compression and enable tension spring (44) to elastically stretch. When the lower speed motor (20) is powered on and rotates, it can drive the conveyor belt (21) to rotate through the upper support roller (18) and the lower support roller (19). The drain cylinder (23) and drain pipe (35) are connected to the water tank (24) through external pipes. The electric conveying device (25) is connected to both the water tank (24) and the electric spraying device (14). The electric spraying device (14), the upper speed motor (15), the lower speed motor (20) and the electric conveying device (25) are connected to an external controller and power supply.

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