A shield tail cleaning device for shield tunnel construction

Abstract

The application relates to the technical field of shield machine cleaning, and discloses a shield tail cleaning device for shield tunnel construction, which comprises a movable base, a center column rotatably arranged on the base, a cylinder fixed on the center column, a first circular ring and a second circular ring rotatably arranged on the outer surface of the cylinder and moving in opposite directions, a first scraper arranged on the first circular ring, a second scraper arranged on the second circular ring, a first extension plate slidably arranged on the first scraper, a second extension plate slidably arranged on the second scraper, and a suction box for sucking materials and fixed to the bottom of the first scraper and the second scraper. According to the technical scheme, the first scraper and the second scraper moving in opposite directions are used to clean the shield tail, the scraped silt is collected on the upper surfaces of the first scraper and the second scraper, the direct falling is reduced, the silt can be conveniently sucked out through the suction box, and secondary cleaning is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine cleaning, in particular to a shield tail cleaning device for shield tunnel construction. Background Art

[0002] During tunnel shield construction, mud and sand will accumulate at the shield tail. If not cleaned in time, the mud and sand will adhere to the shield tail, pipe segments and tunnel walls, causing surface corrosion and damage, affecting shield construction.

[0003] The existing shield tail cleaning device performs shield tail cleaning by using multiple sets of scrapers to rotate along the shield tail. However, when the scrapers scrape the mud and sand on the shield tail, the scrapers usually rotate in one direction. Therefore, when the scrapers rotate from bottom to top, the scraped mud and sand gather on the upper surface of the scrapers, and the scrapers can be used for material collection processing. When rotating from top to bottom, the scraped mud and sand will fall directly and will not gather on the upper surface of the scrapers, which makes collection inconvenient and requires manual secondary processing, which is time-consuming and labor-intensive. Summary of the Invention

[0004] The present invention provides a shield tail cleaning device for shield tunnel construction, which cleans the shield tail by means of a first scraper and a second scraper moving in opposite directions, so that the scraped mud and sand gather on the upper surfaces of the first scraper and the second scraper, reducing the situation of direct falling. It solves the problem mentioned in the above background technology that when the scraper rotates from top to bottom, the scraped mud and sand will fall directly and will not gather on the upper surface of the scraper, thereby making it inconvenient to collect and requiring manual secondary processing, which is time-consuming and labor-intensive.

[0005] The present invention provides the following technical solution: a shield tail cleaning device for shield tunnel construction, comprising a movable base, a central column rotatably provided on the base, a cylinder fixed to the central column, a first circular ring and a second circular ring rotatably provided on the outer surface of the cylinder for moving in opposite directions, a first scraper provided on the first circular ring, a second scraper provided on the second circular ring, a first extension plate slidably provided on the first scraper, a second extension plate slidably provided on the second scraper, and a suction box for sucking material fixed to the bottom of the first scraper and the second scraper;

[0006] A side ring is fixed on the central column, and a first annular groove is opened on the side ring. Slide rods are fixed on the surfaces of the first extension plate and the second extension plate. The slide rods slide inside the first annular groove to make the first extension plate and the second extension plate perform left and right telescopic movements.

[0007] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, an adjustment component is provided between the side ring and the slide bar, and the adjustment component is used to drive the slide bar to move left and right.

[0008] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, the adjustment component includes a first limiting ball fixed to the end of the sliding rod, and a first track groove for sliding of the first limiting ball is opened inside the first annular slide groove, and the first track groove includes a first horizontal portion, a first right-moving portion, a second horizontal portion and a first left-moving portion that are connected to each other.

[0009] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, the adjustment component includes a first sliding protrusion fixed to the end of the sliding rod, and a second track groove for sliding of the first sliding protrusion is opened inside the first annular slide groove, and the second track groove includes a third horizontal portion, a second right-moving portion, a fourth horizontal portion and a second left-moving portion that are connected to each other.

[0010] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, a lifting plate is fixed to the lower surface of the first scraper and the second scraper, and the lifting plate is slidably connected to the first circular ring and the second circular ring. A lifting column is fixed to the bottom of the lifting plate, and a second annular groove for sliding the lifting column is provided on the surface of the cylinder, and a second limiting ball is fixed to the bottom end of the lifting column. A third track groove for sliding the second limiting ball is provided inside the second annular groove, and the third track groove includes a first arc portion, a first descending portion, a second arc portion and a first ascending portion that are connected to each other.

[0011] As an optional solution of the shield tail cleaning device for shield tunnel construction according to the present invention, the first annular chute includes a third arcuate portion, a second descending portion, a fourth arcuate portion and a second ascending portion which are connected to each other.

[0012] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, a cleaning piece is provided between the first scraper and the first extension plate, and between the second scraper and the second extension plate. A rotating shaft is elastically provided on the first scraper and the second scraper. A winding roller is fixed on the circumference of the rotating shaft. The other end of the cleaning piece is fixed to the winding roller. The winding roller retracts and extends the cleaning piece as the first extension plate and the second extension plate extend and retract left and right.

[0013] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, a knocking groove is provided inside the first scraper and the second scraper, a knocking column is elastically arranged in the knocking groove, a horizontal groove for the knocking column to slide is provided inside the first extension plate and the second extension plate, a second sliding protrusion is fixed at the end of the knocking column, and a fourth track groove for the second sliding protrusion to slide is provided inside the horizontal groove.

[0014] As an optional solution of the shield tail cleaning device for shield tunnel construction described in the present invention, the fourth track groove includes a translation part and several groups of knocking parts that are connected, and several groups of knocking parts all include a force storage part and a release part that are connected, and the force storage part and the release part are both connected to the translation part, and a limiting plate is elastically provided at the connection between the force storage part and the translation part.

[0015] As an optional solution to the shield tail cleaning device for shield tunnel construction described in the present invention, a servo motor is fixed to the outer surface of the cylinder, a ring plate is fixed to the inner surface of the first circular ring, a first gear ring is fixed to the surface of the ring plate, a second gear ring is fixed to the inner surface of the second circular ring, and a gear meshing with the first gear ring and the second gear ring is fixed to the output end of the servo motor.

[0016] The present invention has the following beneficial effects:

[0017] 1. The shield tail cleaning device for shield tunnel construction is provided with a first scraper and a second scraper, which are moved in opposite directions. The first scraper scrapes the silt on the shield tail from bottom to top in a clockwise direction, and the second scraper scrapes the silt on the shield tail from bottom to top in a counterclockwise direction, so that the scraped silt can be collected on the upper surfaces of the first scraper and the second scraper. Then, the silt scraped on the first scraper and the second scraper is sucked out through the suction box by the adsorption force generated at the suction box, thereby facilitating direct processing of the scraped silt and reducing the need for manual secondary cleaning.

[0018] In order to increase the adequacy of cleaning, the sliding rod slides along the first annular sliding groove, and the adjusting component drives the sliding rod to perform left and right reciprocating motion, and the sliding rod drives the first extension plate and the second extension plate to perform left and right reciprocating motion, so that the first extension plate and the second extension plate can extend from the inside of the first scraper and the second scraper, increasing the scraping range, thereby increasing the adequacy of cleaning, and when the first scraper and the second scraper rotate to a and d, the first extension plate and the second extension plate can be retracted into the inside of the first scraper and the second scraper respectively, so that the first extension plate and the second extension plate will not collide, avoiding jamming.

[0019] 2. The shield tail cleaning device for shield tunnel construction, when the first scraper and the second scraper rotate, drive the lifting plate to move, the lifting plate drives the lifting column to slide along the second annular slide groove, the lifting column drives the second limiting ball to slide along the third track groove, so that the second limiting ball can drive the lifting column to reciprocate up and down, so that the lifting column can drive the first scraper and the second scraper to reciprocate up and down, when the first scraper rotates clockwise from d to a and the second scraper rotates counterclockwise from d to a, the first scraper and the second scraper can both retract downward, so that the first scraper and the second scraper do not contact the surface of the shield tail, thereby reducing the wear of the first scraper and the second scraper.

[0020] 3. The shield tail cleaning device for shield tunnel construction, when the first extension plate and the second extension plate slide along the first scraper and the second scraper respectively, drives the cleaning member to move by the provided winding roller, so that the cleaning member can deform along with the movement of the first extension plate and the second extension plate, so that the cleaning member always covers the outer side of the first extension plate and the second extension plate, so that the scraped mud and sand falls to the outer surface of the cleaning member, thereby reducing the scraped mud and sand from entering the gap between the first scraper and the first extension plate and the second scraper and the second extension plate, thereby increasing the protection effect and reducing the possibility of the first extension plate and the second extension plate being stuck;

[0021] When the winding roller drives the cleaning piece to rewind, the knocking column is set to slide along the horizontal groove, and the knocking column drives the second sliding protrusion to slide along the fourth track groove, so that the knocking column can knock on the inner surface of the cleaning piece, causing the cleaning piece to vibrate, making it easier for the mud and sand remaining on the surface of the cleaning piece to fall off, making it easier for the winding roller to perform the winding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the first scraper part.

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the first scraper at different angles.

[0025] Figure 4 This is a schematic diagram of the internal structure of the first and second circular ring parts in the present invention.

[0026] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0027] Figure 6 This is a structural cross-sectional view of the first circular ring, the second circular ring, and the side plate in the present invention.

[0028] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle.

[0029] Figure 8 It is a schematic diagram of the planar structure of the first track groove in the present invention.

[0030] Figure 9 For the present invention Figure 6 Enlarged view of point C in the middle.

[0031] Figure 10 It is a schematic diagram of the planar structure of the first scraper sliding along the third track groove in the present invention.

[0032] Figure 11 It is a schematic diagram of the planar structure of the second scraper sliding along the third track groove in the present invention.

[0033] Figure 12 This is a schematic structural diagram of the first annular chute in the present invention.

[0034] Figure 13 This is a top view of the structure of the first scraper and the first extension plate in the present invention.

[0035] Figure 14 Schematic diagram of the structure of the fourth track groove in the present invention.

[0036] Figure 15 It is a structural cross-sectional view of the limiting plate part in the present invention.

[0037] Figure 16 It is a structural schematic diagram of another technical solution of the adjustment component in the present invention.

[0038] Figure 17 It is a schematic diagram of the top plan structure of the second track groove in the present invention.

[0039] Figure 18 It is a side structural cross-sectional view of the second track groove and the first annular sliding groove in the present invention.

[0040] In the figure: 1. base; 2. center column; 3. cylinder; 4. first ring; 5. second ring; 6. first scraper; 61. first extension plate; 7. second scraper; 71. second extension plate; 8. suction hole; 9. suction box; 91. extension box; 10. side ring; 11. first annular slide; 111. third arcuate portion; 112. second descending portion; 113. fourth arcuate portion; 114. second ascending portion; 12. slide bar; 13. first limiting ball; 14. first track groove; 141. first horizontal portion; 142. first rightward shift portion; 143. second horizontal portion; 144. first leftward shift portion; 15. first sliding protrusion; 16. second track groove; 161. third horizontal portion; 162. second rightward shift portion; 163. fourth horizontal portion; 164. second leftward shift portion; 17. Lifting plate; 18. Lifting column; 19. Second annular slide groove; 20. Second limiting ball; 21. Third track groove; 211. First arc-shaped portion; 212. First descending portion; 213. Second arc-shaped portion; 214. First ascending portion; 22. Cleaning member; 23. Rotating shaft; 24. Winding roller; 25. Knocking groove; 26. Knocking column; 27. Horizontal groove; 28. Second sliding protrusion; 29. ​​Fourth track groove; 291. Translation portion; 292. Knocking portion; 2921. Power storage portion; 2922. Release portion; 2923. Limiting plate; 294. Rotating groove; 295. Rotating rod; 296. Second torsion spring; 297. First stop block; 298. Second stop block; 30. Servo motor; 31. Ring plate; 32. First gear ring; 33. Second gear ring; 34. Gear; 35. Spring. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] For example 1, please refer to Figures 1-18 A shield tail cleaning device for shield tunnel construction includes a movable base 1, a central column 2 is rotatably provided on the base 1, a cylinder 3 is fixed on the central column 2, a first circular ring 4 and a second circular ring 5 are rotatably provided on the outer surface of the cylinder 3, a first scraper 6 is provided on the first circular ring 4, a second scraper 7 is provided on the second circular ring 5, a first extension plate 61 is slidably provided on the first scraper 6, a second extension plate 71 is slidably provided on the second scraper 7, and a suction box 9 for suctioning material is fixed at the bottom of the first scraper 6 and the second scraper 7;

[0043] The side ring 10 is fixed on the center column 2, the first annular sliding slot 11 is arranged on the side ring 10, the surfaces of the first extension plate 61 and the second extension plate 71 are fixed with sliding rods 12, and the sliding rods 12 slide in the first annular sliding slot 11 to make the first extension plate 61 and the second extension plate 71 perform left-right telescopic movement.

[0044] The adjusting assembly is arranged between the side ring 10 and the sliding rod 12 and is used for driving the sliding rod 12 to perform left-right movement.

[0045] The adjusting assembly comprises a first limiting ball 13 fixed at the end of the sliding rod 12, the first annular sliding slot 11 is internally provided with a first track groove 14 for sliding of the first limiting ball 13, and the first track groove 14 comprises a first horizontal part 141, a first right-moving part 142, a second horizontal part 143 and a first left-moving part 144 which are communicatively arranged.

[0046] The outer surface of the cylinder 3 is fixed with a servo motor 30, the inner surface of the first circular ring 4 is fixed with a ring plate 31, the surface of the ring plate 31 is fixed with a first tooth ring 32, the inner surface of the second circular ring 5 is fixed with a second tooth ring 33, and the output end of the servo motor 30 is fixed with a gear wheel 34 meshing with the first tooth ring 32 and the second tooth ring 33.

[0047] In the technical scheme, the four groups of first scrapers 6 and the four groups of second scrapers 7 are arranged in an array of 180° and oppositely arranged; in the conventional shield tail cleaning, the shield tail is circular in cross section, and the scraper is usually rotated in one direction, so that the silt scraped off can be collected when the scraper rotates from bottom to top, but the silt scraped off will directly fall off when the scraper rotates from top to bottom, which is inconvenient for collection and needs to be manually processed, which is time-consuming and laborious; therefore, in the shield tail cleaning, first, the base 1 is moved to a suitable position so that the first scraper 6 and the second scraper 7 are in contact with the shield tail, then the servo motor 30 drives the gear wheel 34 to rotate, the gear wheel 34 drives the first tooth ring 32 and the second tooth ring 33 to rotate, the first tooth ring 32 and the second tooth ring 33 drive the first circular ring 4 and the second circular ring 5 to rotate, and the rotation directions of the first tooth ring 32 and the second tooth ring 33 are opposite, so that the movement directions of the first circular ring 4 and the second circular ring 5 are opposite, such as Figure 1As shown, the first ring 4 drives the first scraper 6 to rotate clockwise, so that the first scraper 6 cleans the left semicircular surface of the shield tail, and the second ring 5 drives the second scraper 7 to rotate counterclockwise, so that the second scraper 7 cleans the right semicircular surface of the shield tail; through the above process, when the first ring 4 and the second ring 5 rotate, the first scraper 6 scrapes the silt from bottom to top clockwise, and the second scraper 7 scrapes the silt from bottom to top counterclockwise, so that the scraped silt gathers on the upper surface of the first scraper 6 and the second scraper 7, and then a suction hole 8 is opened on the suction box 9, and the suction hole 8 is connected to a negative pressure adsorption device through a suction pipe, which can generate a large adsorption force at the suction box 9, so that the silt scraped from the first scraper 6 and the second scraper 7 is sucked out through the suction box 9 and the suction hole 8, and the negative pressure adsorption device is a prior art, not an innovation of the present application, and will not be described in detail;

[0048] When the first scraper 6 and the second scraper 7 are cleaning the shield tail, when the first scraper 6 rotates clockwise from bottom to top, it can only clean half the width of the left semicircular surface of the shield tail. Similarly, when the second scraper 7 rotates counterclockwise from bottom to top, it can only clean half the width of the right semicircular surface of the shield tail, which results in incomplete cleaning of the shield tail; therefore, when the first scraper 6 rotates clockwise from a to d, the first scraper 6 drives the slide bar 12 to move, so that the slide bar 12 slides along the first annular slide groove 11, and the slide bar 12 drives the first limiting ball 13 to slide along the first track groove 14. First, the first limiting ball 13 slides from the first horizontal part 141 to the first right shift part 142, so that the first limiting ball 13 drives the slide bar 12 to move to the right, and the slide bar 12 moves to the right to push the first extension plate 61 to move to the right along the first scraper 6, so that the first extension plate 61 extends from one side of the first scraper 6 When the first extension plate 61 is extended to the maximum length, the first scraper 6 rotates to position b, and then the first limiting ball 13 continues to slide along the second horizontal portion 143 until the first scraper 6 slides from position b to position c. During the process of the first scraper 6 sliding from position b to position c, the first scraper 6 cooperates with the first extension plate 61 to clean the entire width of the shield tail. Then the first limiting ball 13 slides along the first left shifting portion 144, so that the first limiting ball 13 drives the sliding rod 12 to move left and reset, and the sliding rod 12 drives the first extension plate 61 to move left and reset, and before the first scraper 6 rotates clockwise to position d, the first extension plate 61 is completely retracted into the first scraper 6.

[0049] When the second scraper 7 rotates counterclockwise from a to d, the working principle of the second extension plate 71 is the same as that of the first extension plate 61, but the movement direction is opposite, so that the second scraper 7 cooperates with the second extension plate 71 to complete the cleaning of the entire width range of the shield tail, and before the second extension plate 71 rotates counterclockwise to d, the second extension plate 71 can also be completely accommodated in the second scraper 7, so that the first extension plate 61 and the second extension plate 71 do not collide when rotating to a and d;

[0050] Because the first extension plate 61 shrinks to the inside of the first scraper 6 and the second extension plate 71 shrinks to the inside of the second scraper 7 near a and d, there are positions that cannot be scraped by the first scraper 6, the first extension plate 61, the second scraper 7 and the second extension plate 71, so that the silt in this range cannot be fully scraped, and there is a scraping dead angle; therefore, the center column 2 is rotatably connected with the base 1, and a driving motor can be installed inside the base 1, the output end of the driving motor is fixedly connected with the center column 2, the center column 2 is driven to rotate by the driving motor, the center column 2 rotates to change the positions of the first extension plate 61 and the second extension plate 71 accommodated in the first scraper 6 and the second scraper 7 respectively, so that the positions of a and d change, thereby reducing the cleaning dead angle, and the rotation angle of the center column 2 is between -30° and 30°. In addition, the extension box 91 is slidably arranged inside the suction box 9, and when the first extension plate 61 extends and retracts relative to the first scraper 6, the extension box 91 can drive the suction box 9 to extend and retract, so that the silt scraped is more conveniently entered into the suction box 9, and the material leakage is reduced.

[0051] In the second embodiment, another technical solution of the adjusting assembly is provided, and specific details are shown in Figures 1-18 The adjusting assembly comprises a first sliding protrusion 15 fixed to the end of the sliding rod 12, a second track groove 16 for sliding of the first sliding protrusion 15 is arranged in the inside of the first annular sliding groove 11, and the second track groove 16 comprises a third horizontal part 161, a second right moving part 162, a fourth horizontal part 163 and a second left moving part 164 which are arranged in communication.

[0052] In this technical solution, when the slide bar 12 slides along the first annular slide groove 11, the slide bar 12 drives the first sliding protrusion 15 to slide from the third horizontal portion 161 to the second right-moving portion 162, so that the first sliding protrusion 15 slides the slide bar 12 to move to the right, and the slide bar 12 moves to the right and pushes the first extension plate 61 to move to the right along the first scraper 6, so that the first extension plate 61 extends from one side of the first scraper 6, and then the first sliding protrusion 15 slides along the fourth horizontal portion 163, and the first extension plate 61 extends to the maximum length. When the first sliding protrusion 15 slides along the second left-moving portion 164, the first sliding protrusion 15 drives the slide bar 12 to move to the left and reset, and the slide bar 12 drives the first extension plate 61 to move to the left and reset, realizing the left and right reciprocating motion of the first extension plate 61.

[0053] Example 3: This example is an improvement based on Example 1 and Example 2. For details, please refer to Figures 1-18 A lifting plate 17 is fixed to the lower surface of the first scraper 6 and the second scraper 7. The lifting plate 17 is slidably connected to the first ring 4 and the second ring 5. A lifting column 18 is fixed to the bottom of the lifting plate 17. A second annular chute 19 for sliding of the lifting column 18 is provided on the surface of the cylinder 3. A second limiting ball 20 is fixed to the bottom end of the lifting column 18. A third track groove 21 for sliding of the second limiting ball 20 is provided inside the second annular chute 19. The third track groove 21 includes a first arc portion 211, a first descending portion 212, a second arc portion 213 and a first ascending portion 214 that are connected to each other.

[0054] The first annular sliding groove 11 includes a third arc-shaped portion 111 , a second descending portion 112 , a fourth arc-shaped portion 113 and a second ascending portion 114 which are connected to each other.

[0055] In the present technical solution, when the first scraper 6 rotates clockwise to position d and the second scraper 7 rotates counterclockwise to position d, the mud and sand on the shield tail on the right side of the first scraper 6 is scraped off by the second scraper 7 and the second extension plate 71, and the mud and sand on the shield tail on the left side of the second scraper 7 is scraped off by the first scraper 6 and the first extension plate 61. There is no need for the first scraper 6 to scrape the mud and sand on the right side of the shield tail, nor is there a need for the second scraper 7 to scrape the mud and sand on the left side of the shield tail. If the first scraper 6 and the second scraper 7 continue to rotate at this time, the first scraper 6 will wear against the surface of the right shield tail, and the second scraper 7 will wear against the surface of the left shield tail, thereby reducing the service life of the first scraper 6 and the second scraper 7; therefore, Figure 10As shown, when the first scraper 6 rotates clockwise to position d, the first scraper 6 drives the lifting plate 17 to rotate to position d, and the lifting plate 17 drives the lifting column 18 to rotate to position d along the second annular slot 19. Then, when the first scraper 6 continues to rotate clockwise, the lifting column 18 drives the second limiting ball 20 to slide along the first descending portion 212 of the third track slot 21, so that the second limiting ball 20 drives the lifting column 18 to move downward, the lifting column 18 drives the lifting plate 17 to move downward, and the lifting plate 17 drives the first scraper 6 downward. The first scraper 6 moves so that the first scraper 6 is separated from the shield tail surface. When the first scraper 6 continues to rotate, the second limiting ball 20 slides along the second arc portion 213, so that the first scraper 6 will no longer wear the shield tail surface. When the first scraper 6 rotates clockwise to before point a, the second limiting ball 20 slides along the first rising portion 214, so that the second limiting ball 20 drives the lifting column 18 to move outward, extending the lifting column 18, so that the first scraper 6 contacts the shield tail surface again, thereby performing the sediment scraping work;

[0056] When the second scraper 7 rotates counterclockwise from position d to position a, the working principle of the second scraper 7 is the same as that of the first scraper 6. Figure 11 As shown, when the second scraper 7 rotates counterclockwise to position d, the second scraper 7 continues to rotate counterclockwise, driving the lifting column 18 to rotate counterclockwise, and the lifting column 18 drives the second limiting ball 20 to slide along the first descending portion 212. The second limiting ball 20 drives the second scraper 7 to move downward, so that the second scraper 7 will no longer contact the surface of the shield tail, thereby avoiding wear between the second scraper 7 and the shield tail surface. When the second scraper 7 rotates counterclockwise to position a, the second limiting ball 20 slides along the first ascending portion 214, extending the second scraper 7 outward, so that the second scraper 7 contacts the surface of the shield tail again, thereby performing the sediment scraping work;

[0057] In the present technical solution, when the first scraper 6 and the second scraper 7 move up and down, in order to avoid the sliding rod 12 from getting stuck, when the second limiting ball 20 slides along the first arc-shaped portion 211, the sliding rod 12 slides along the third arc-shaped portion 111; when the second limiting ball 20 slides along the first descending portion 212, the sliding rod 12 slides along the second descending portion 112; when the second limiting ball 20 slides along the second arc-shaped portion 213, the sliding rod 12 slides along the fourth arc-shaped portion 113; when the second limiting ball 20 slides along the first ascending portion 214, the sliding rod 12 slides along the second ascending portion 114;

[0058] In addition, if Figure 18 As shown, the side track of the second track groove 16 in the second embodiment is the same as the track of the first annular sliding groove 11 , so that the first sliding protrusion 15 rises and falls with the rise and fall of the sliding rod 12 .

[0059] In the fourth embodiment, since the first scraper 6 and the first extension plate 61, and the second scraper 7 and the second extension plate 71 are connected in a sliding manner, when the first extension plate 61 and the second extension plate 71 extend to scrape the mud and sand at the shield tail, the scraped mud and sand may enter the gap between the scraper and the extension plate, affecting the normal sliding of the first extension plate 61 and the second extension plate 71, thereby affecting the normal operation. To address this problem, this embodiment is an improvement made on the basis of the third embodiment. For details, please refer to Figures 1-18 A cleaning member 22 is provided between the first scraper 6 and the first extension plate 61, and between the second scraper 7 and the second extension plate 71. A rotating shaft 23 is elastically provided on the first scraper 6 and the second scraper 7. A winding roller 24 is fixed on the circumference of the rotating shaft 23. The other end of the cleaning member 22 is fixed to the winding roller 24. The winding roller 24 retracts and extends the cleaning member 22 as the first extension plate 61 and the second extension plate 71 move left and right.

[0060] The first scraper 6 and the second scraper 7 are each provided with a knocking groove 25, in which a knocking post 26 is elastically arranged. The first extension plate 61 and the second extension plate 71 are each provided with a horizontal groove 27 for the knocking post 26 to slide. A second sliding protrusion 28 is fixed to the end of the knocking post 26. A fourth track groove 29 is provided in the horizontal groove 27 for the second sliding protrusion 28 to slide.

[0061] The fourth track groove 29 includes a translation part 291 and several groups of knocking parts 292 that are connected to each other. The several groups of knocking parts 292 all include a force storage part 2921 and a release part 2922 that are connected to each other. The force storage part 2921 and the release part 2922 are both connected to the translation part 291, and a limiting plate 2923 is elastically provided at the connection between the force storage part 2921 and the translation part 291.

[0062] In the present technical solution, when the first extension plate 61 slides left and right relative to the first scraper 6 and the second extension plate 71 slides left and right relative to the second scraper 7, the cleaning member 22 can be driven to move, and the first extension plate 61 and the second extension plate 71 drive the cleaning member 22 to move in the same manner. The following is an example of the first extension plate 61 driving the cleaning member 22 to move. Figure 13As shown, when the first extension plate 61 moves to the right, the first extension plate 61 contacts the cleaning member 22, and one end of the cleaning member 22 is fixed to the surface of the first scraper 6, so that the winding roller 24 performs the unwinding process, so that the cleaning member 22 becomes longer, so that the cleaning member 22 can always cover the outer surface of the first scraper 6 and the first extension plate 61, so that the scraped mud and sand fall to the outer surface of the cleaning member 22, thereby reducing the scraped mud and sand from entering the gap between the first scraper 6 and the first extension plate 61, thereby increasing the protection effect; the rotating shaft A first torsion spring is provided between the bottom end of 23 and the inner wall of the first scraper 6, one end of the first torsion spring is fixed to the rotating shaft 23, and the other end of the first torsion spring is fixed to the inner wall of the first scraper 6. When the rotating shaft 23 rotates to drive the winding roller 24 to unwind the cleaning member 22, the first torsion spring accumulates force. When the first extension plate 61 moves to the left, the cleaning member 22 loses the resistance of the first extension plate 61, and the first torsion spring releases force, causing the winding roller 24 to reverse and rewind the cleaning member 22, so that the cleaning member 22 is always in close contact with the surface of the first scraper 6;

[0063] When the cleaning piece 22 is rolled up, a small amount of sand will remain on the surface of the cleaning piece 22 after the cleaning piece 22 has scraped away the sand. If the cleaning piece 22 is rolled up directly, the sand remaining on the surface of the cleaning piece 22 will also be rolled up together, causing the cleaning piece 22 to bulge when it is rolled up, increasing the difficulty of rolling up. Figure 13 As shown, when the first extension plate 61 moves to the right relative to the first scraper 6, the knocking column 26 slides along the horizontal groove 27, and the knocking column 26 drives the second sliding protrusion 28 to slide to the left along the translation portion 291 of the fourth track groove 29 until it slides to the leftmost side of the translation portion 291. When the first extension plate 61 moves to the left relative to the first scraper 6, that is, when the first extension plate 61 contracts toward the inside of the first scraper 6, the second sliding protrusion 28 slides from the leftmost side of the translation portion 291 to the knocking portion 292. A spring 35 is provided on the outer side of the knocking column 26, one end of the spring 35 is fixed to the knocking column 26, and the other end of the spring 35 is fixed to the inner wall of the first scraper 6. First, the second sliding protrusion 28 moves along the force storage portion 2921 slides, and the second sliding protrusion 28 drives the knocking column 26 to move upward, compressing the spring 35, so that the spring 35 accumulates force, and then the second sliding protrusion 28 slides along the release portion 2922, and the spring 35 releases force, so that the knocking column 26 is released instantly, and the knocking column 26 moves downward, so that the knocking column 26 knocks on the inner surface of the cleaning member 22, so that the surface of the cleaning member 22 vibrates, which facilitates the falling of the mud and sand remaining on the surface of the cleaning member 22. At the same time, by providing multiple groups of knocking columns 26, when the first extension plate 61 retracts to the left relative to the first scraper 6, the knocking column 26 can knock on the cleaning member 22 multiple times, so that the effect of removing the mud and sand remaining on the surface of the cleaning member 22 is better;

[0064] The cleaning piece 22 is a soft structure, which can be a rubber structure, and can deform with the movement of the first scraper 6 and the second scraper 7.

[0065] In the technical solution, as shown in Figure 14 The horizontal slot 27 is provided with a rotating slot 294 on the inner wall, the rotating slot 294 is provided with a rotating rod 295, the limiting plate 2923 is fixed on the circumference of the rotating rod 295, the second torsional spring 296 is sleeved on the rotating rod 295, the e end of the second torsional spring 296 is fixed with the surface of the limiting plate 2923, the f end of the second torsional spring 296 is fixed with the inner wall of the rotating slot 294, the first stop block 297 is fixed on the surface of the limiting plate 2923, and the second stop block 298 is fixed on the inner wall of the rotating slot 294; when the second sliding protrusion 28 slides to the left along the translation part 291, as shown in Figure 15 The second sliding protrusion 28 is in contact with the limiting plate 2923, which promotes the limiting plate 2923 to rotate clockwise as shown in Figure 16 , and the second torsional spring 296 is energized; when the second sliding protrusion 28 continues to slide to the left, the limiting plate 2923 loses the contact of the second sliding protrusion 28, the second torsional spring 296 is de-energized, and the limiting plate 2923 is reset to Figure 16 When the second sliding protrusion 28 wants to slide to the right, the limiting plate 2923 cannot rotate counterclockwise as shown in Figure 16 , due to the contact between the first stop block 297 and the second stop block 298, so that the second sliding protrusion 28 can only slide along the force storage part 2921.

[0066] It should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0067] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A shield tail cleaning device for shield tunnel construction, comprising a movable base (1), characterized in that: A central column (2) is rotatably provided on the base (1), a cylinder (3) is fixed on the central column (2), a first circular ring (4) and a second circular ring (5) are rotatably provided on the outer surface of the cylinder (3) so as to move in opposite directions, a first scraper (6) is provided on the first circular ring (4), a second scraper (7) is provided on the second circular ring (5), a first extension plate (61) is slidably provided on the first scraper (6), a second extension plate (71) is slidably provided on the second scraper (7), and a suction box (9) for suctioning materials is fixed to the bottom of each of the first scraper (6) and the second scraper (7); A side ring (10) is fixed on the central column (2), and a first annular sliding groove (11) is provided on the side ring (10). Slide rods (12) are fixed on the surfaces of the first extension plate (61) and the second extension plate (71). The slide rods (12) slide inside the first annular sliding groove (11) to enable the first extension plate (61) and the second extension plate (71) to perform left and right telescopic movements; An adjustment component is provided between the side ring (10) and the slide rod (12), and the adjustment component is used to drive the slide rod (12) to move left and right; The adjustment component includes a first limiting ball (13) fixed to the end of the slide rod (12), a first track groove (14) for the first limiting ball (13) to slide is opened inside the first annular slide groove (11), and the first track groove (14) includes a first horizontal portion (141), a first right-moving portion (142), a second horizontal portion (143) and a first left-moving portion (144) that are connected, or the adjustment component includes a first sliding protrusion (15) fixed to the end of the slide rod (12), a second track groove (16) for the first sliding protrusion (15) to slide is opened inside the first annular slide groove (11), and the second track groove (16) includes a third horizontal portion (161), a second right-moving portion (162), a fourth horizontal portion (163) and a second left-moving portion (164) that are connected.

2. The shield tail cleaning device for shield tunnel construction according to claim 1, characterized in that: A lifting plate (17) is fixed to the lower surface of each of the first scraper (6) and the second scraper (7), and the lifting plate (17) is slidably connected to the first circular ring (4) and the second circular ring (5). A lifting column (18) is fixed to the bottom of the lifting plate (17). A second annular chute (19) for sliding of the lifting column (18) is provided on the surface of the cylinder (3). A second limiting ball (20) is fixed to the bottom end of the lifting column (18). A third track groove (21) for sliding of the second limiting ball (20) is provided inside the second annular chute (19). The third track groove (21) includes a first arc portion (211), a first descending portion (212), a second arc portion (213) and a first ascending portion (214) which are connected to each other.

3. The shield tail cleaning device for shield tunnel construction according to claim 2, characterized in that: The first annular chute (11) comprises a third arc-shaped portion (111), a second descending portion (112), a fourth arc-shaped portion (113) and a second ascending portion (114) which are arranged in communication with each other.

4. The shield tail cleaning device for shield tunnel construction according to claim 1, characterized in that: A cleaning piece (22) is provided between the first scraper (6) and the first extension plate (61), and between the second scraper (7) and the second extension plate (71). A rotating shaft (23) is elastically provided on the first scraper (6) and the second scraper (7). A winding roller (24) is fixed on the circumference of the rotating shaft (23). The other end of the cleaning piece (22) is fixed to the winding roller (24). The winding roller (24) retracts and extends the cleaning piece (22) as the first extension plate (61) and the second extension plate (71) move left and right.

5. The shield tail cleaning device for shield tunnel construction according to claim 4, characterized in that: A knocking groove (25) is provided inside the first scraper (6) and the second scraper (7), a knocking column (26) is elastically provided inside the knocking groove (25), a horizontal groove (27) for the knocking column (26) to slide is provided inside the first extension plate (61) and the second extension plate (71), a second sliding protrusion (28) is fixed at the end of the knocking column (26), and a fourth track groove (29) is provided inside the horizontal groove (27) for the second sliding protrusion (28) to slide.

6. The shield tail cleaning device for shield tunnel construction according to claim 5, characterized in that: The fourth track groove (29) comprises a translation part (291) and a plurality of groups of knocking parts (292) which are connected to each other. The plurality of groups of knocking parts (292) each comprise a power storage part (2921) and a release part (2922) which are connected to each other. The power storage part (2921) and the release part (2922) are both connected to the translation part (291), and a limit plate (2923) is elastically provided at the connection between the power storage part (2921) and the translation part (291).

7. The shield tail cleaning device for shield tunnel construction according to claim 1, characterized in that: A servo motor (30) is fixed to the outer surface of the cylinder (3), a ring plate (31) is fixed to the inner surface of the first circular ring (4), a first gear ring (32) is fixed to the surface of the ring plate (31), a second gear ring (33) is fixed to the inner surface of the second circular ring (5), and a gear (34) meshing with the first gear ring (32) and the second gear ring (33) is fixed to the output end of the servo motor (30).

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