Slurry conveying device for shield tunnel

Abstract

The slurry conveying device for the shield tunnel comprises a conveying assembly and a jacking assembly, the conveying assembly is provided with a horizontally-arranged conveying belt, the conveying belt comprises a horizontal section and an upslope section which are sequentially arranged in the conveying direction, baffles are arranged on the two sides of the conveying assembly, and overflow ports located above the horizontal section are formed in the baffles in a penetrating mode; and the jacking assembly is rotationally connected to the baffle and located on the inner side of the horizontal section, the jacking assembly can vertically swing to jack the top of the horizontal section so that a protruding part protruding upwards can be formed on the conveying face of the horizontal section, and the protruding part is located on the side, close to the upslope section, of the overflow opening and used for blocking thin slag and discharging the thin slag through the overflow opening. According to the slurry conveying device for the shield tunnel, slipping or backflow of thin slag on the uphill section is avoided, and leakage of the thin slag from the two sides of the conveying belt is avoided.

Description

Technical Field

[0001] This invention belongs to the field of material conveying technology, and more specifically, relates to a mud conveying device for shield tunnels. Background Technology

[0002] In shield tunnel construction, long-distance belt conveyor transport of slurry is a crucial step in muck removal. However, when the belt conveyor is set up on an uphill section, the transport conditions become extremely complex, presenting a long-standing and unresolved problem: viscous dry slurry (thick slurry) can be transported stably due to its weight and strong cohesion; but when encountering highly fluid, thin slurry, its light weight makes it difficult to provide sufficient belt adhesion, easily leading to slippage and backflow on uphill sections, causing slurry to leak from both sides of the belt. This not only causes on-site environmental pollution and muck loss but also requires frequent shutdowns for cleaning, severely restricting the continuous and efficient tunneling of the shield machine. Summary of the Invention

[0003] This invention provides a mud conveying device for shield tunnels, which not only prevents the mud from slipping or flowing back on the uphill section, but also prevents the mud from leaking from both sides of the conveyor belt.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a mud conveying device for shield tunnels is provided, including a conveying assembly and an upper jacking assembly. The conveying assembly has a horizontally arranged conveyor belt, which includes a horizontal section and an uphill section arranged sequentially along the conveying direction. Baffles are provided on both sides of the conveying assembly, and an overflow port located above the horizontal section is provided through the baffles. The upper jacking assembly is rotatably connected to the baffles and located inside the horizontal section. The upper jacking assembly can vertically swing to jack the top of the horizontal section so that an upwardly protruding part is formed on the conveying surface of the horizontal section. The protruding part is located on the side of the overflow port near the uphill section, which is used to block the slurry and allow the slurry to be discharged through the overflow port.

[0005] In one possible implementation, the top assembly includes a connecting shaft, two sets of swing arms, two rotating rollers, and a counterweight. The connecting shaft is mounted on a baffle and extends horizontally along the conveying direction perpendicular to the conveyor belt. A rotating sleeve is rotatably fitted around the outer periphery of the connecting shaft. The two sets of swing arms are respectively located on both sides of the rotating sleeve. The two rotating rollers are rotatably connected to the two sets of swing arms in a one-to-one correspondence, and their main shafts are parallel to the main shaft of the connecting shaft. The counterweight is mounted on one set of swing arms and is used to lift the other set of swing arms and cause the corresponding rotating roller to top of the horizontal section.

[0006] In some embodiments, a groove is provided on the side wall of one set of swing arms. The groove extends through the swing arm along the axial direction of the connecting shaft. Several sets of grooves are spaced apart along the length of the swing arm. A counterweight rod is embedded in one set of grooves, and the counterweight is disposed on the counterweight rod.

[0007] In one possible implementation, the baffle is provided with a filter plate for sealing the overflow port, and the filter plate has filter holes running through it.

[0008] In some embodiments, a needle plate is slidably connected to the baffle along a conveying direction perpendicular to the conveyor belt. The needle plate is located on the side of the filter plate away from the conveyor belt and has a cleaning needle that can be inserted into the filter holes to clean them.

[0009] In some embodiments, there are two needle plates, located on both sides of the central axis of the filter plate. A rotating rod that can rotate horizontally is rotatably connected to the outer wall of the baffle. Both needle plates are connected to the two ends of the rotating rod through a hinge rod. One end of the hinge rod is hinged to the needle plate, and the other end is hinged to the end of the rotating rod. The two needle plates can move towards each other or away from each other to clean the filter holes alternately.

[0010] In some embodiments, the outer wall of the baffle is provided with guide posts extending perpendicular to the surface of the baffle. There are two sets of guide posts, which are arranged in a one-to-one correspondence with the two needle plates. The needle plates are slidably connected to the guide posts through a connecting frame. One set of guide posts is fitted with a tension spring on its outer periphery. One end of the tension spring is connected to the baffle, and the other end is connected to the connecting frame. The guide post with the tension spring is provided with a drive assembly for driving the connecting frame.

[0011] In some embodiments, the drive assembly includes an iron block and an electromagnet. The iron block is disposed on a guide post and located on the side of the connecting frame away from the tension spring. The electromagnet is disposed on the guide post and located on the side of the iron block away from the tension spring. The electromagnet is capable of attracting the iron block when energized or releasing the iron block when de-energized.

[0012] In some embodiments, a mounting plate is provided on the guide post, the guide post passes through the mounting plate and is slidably connected to the mounting plate, an electromagnet is provided on the mounting plate, and a locking element for locking the axial position of the mounting plate is provided on the mounting plate.

[0013] In one possible implementation, a guide box is provided on the outer wall of the baffle below the overflow port, and a collection box is provided on the outer side of the baffle below the guide box for collecting sludge.

[0014] The slurry conveying device for shield tunnels provided in this embodiment, compared with the prior art, has a method where the slurry flow is blocked by protrusions under the conveyor belt. The fluid, thin slurry accumulates in front of the protrusions, and when its liquid level exceeds the overflow port on the baffle, it overflows from the overflow port, achieving separation and discharge. The thick slurry, due to its larger particle size and viscosity, is mainly carried by the conveyor belt. With the "push" of the protrusions or its own inertia, some of it can cross the protrusions and continue into the uphill section with the conveyor belt, while the other part accumulates on the side of the protrusion away from the uphill section. When it accumulates to a certain amount, the thick slurry overcomes the upward force of the upper component, pressing down the protrusions and continuing to be conveyed with the conveyor belt. Subsequently, the protrusions recover, continuing the separation of the thin and thick slurries. Combined with the baffles blocking the conveyor components on both sides, this not only prevents the thin slurry from slipping or flowing back on the uphill section but also prevents it from leaking from both sides of the conveyor belt. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a mud conveying device for shield tunnels provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A magnified schematic diagram of the local structure at point I; Figure 3 This is a schematic diagram of the structure of a mud conveying device for shield tunnels with some baffles removed, provided in an embodiment of the present invention. Figure 4 This is an embodiment of the present invention. Figure 3 A magnified schematic diagram of the local structure at point II; Figure 5 This is a schematic diagram of the shield tunnel mud conveying device provided in an embodiment of the present invention, with part of the baffle removed; Figure 6 This is an embodiment of the present invention. Figure 5 A schematic diagram of the structure of the upper and middle components.

[0017] The following are the labeling elements in the figure: 10. Conveying assembly; 11. Conveyor belt; 12. Horizontal section; 13. Uphill section; 14. Baffle; 15. Overflow port; 16. Protrusion; 20. Top assembly; 21. Coupling shaft; 22. Rotating sleeve; 23. Swing arm; 24. Rotating roller; 25. Counterweight; 26. Groove; 27. Counterweight rod; 30. Filter plate; 31. Filter hole; 40. Needle plate; 41. Unblocking needle; 50. Rotating rod; 51. Hinge rod; 60. Guide column; 61. Connecting frame; 62. Tension spring; 70. Drive assembly; 71. Iron block; 72. Electromagnet; 80. Mounting plate; 81. Locking component; 90. Flow guide box; 91. Collection box. Detailed Implementation

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0020] It should be noted that the conveying direction of the conveying component is from the horizontal section to the uphill section.

[0021] Please see Figures 1 to 6The present invention will now describe the slurry conveying device for shield tunnels. The slurry conveying device for shield tunnels includes a conveying assembly 10 and an upper jacking assembly 20. The conveying assembly 10 has a horizontally arranged conveyor belt 11, which includes a horizontal section 12 and an uphill section 13 arranged sequentially along the conveying direction. Both sides of the conveying assembly 10 are provided with baffles 14, and an overflow port 15 located above the horizontal section 12 is provided through the baffles 14. The upper jacking assembly 20 is rotatably connected to the baffles 14 and is located inside the horizontal section 12. The upper jacking assembly 20 can vertically swing to jack the top of the horizontal section 12 so that an upwardly protruding protrusion 16 is formed on the conveying surface of the horizontal section 12. The protrusion 16 is located on the side of the overflow port 15 near the uphill section 13, and is used to block the slurry and allow the slurry to be discharged through the overflow port 15.

[0022] This application provides a mud conveying device for shield tunnels. In actual use, a dynamically formed "protrusion 16" is installed at the end of the horizontal section 12 of the conveyor belt 11. This utilizes the difference in physical properties between thin slurry (the mud portion with high moisture content, good fluidity, and fine particles) and thick slurry (the slag portion with large particles and high viscosity). The protrusion 16 effectively blocks and guides the thin slurry from the overflow port 15, while allowing the thick slurry to continue being conveyed to the uphill section 13, achieving continuous and automatic preliminary liquid-solid separation and greatly improving separation efficiency.

[0023] By integrating the separation function directly into the conveying device, there is no need to set up a large sedimentation tank or complex centrifugal separation equipment. This is particularly suitable for shield tunnel construction sites with limited space, simplifying the process and reducing equipment costs and floor space.

[0024] By separating the thin sludge in advance, the total amount and water content of the mud entering the uphill section 13 are reduced, the load and power consumption of the conveyor belt 11 are reduced, and the slippage or backflow of the excessively thin mud in the uphill section 13 is avoided, ensuring the stable and efficient transportation of the thick sludge to the next processing stage.

[0025] The mixed slurry (containing both thin and thick slurry) produced by the tunnel boring machine is poured onto the horizontal section 12 of the conveyor belt 11. The conveyor belt 11 continues to operate, transporting the slurry diagonally upward (uphill section 13). The upper jacking assembly 20, located inside the horizontal section 12, swings vertically, continuously lifting the upper working surface of the conveyor belt 11 upward, forming a local upward-protruding barrier—the protrusion 16. This protrusion 16 is located on the side of the overflow port 15 near the uphill section 13. As the conveyor belt 11 moves, the slurry flow is blocked by the protrusion 16. The more fluid thin slurry accumulates in front of the protrusion 16, and when its liquid level exceeds the overflow port 15 on the baffle 14, it overflows from the overflow port 15, achieving separation and discharge. Due to its larger particle size and viscosity, the thick sludge is mainly carried by the conveyor belt 11. With the "boost" of the protrusion 16 or its own inertia, part of it can pass over the protrusion 16 and continue to enter the uphill section 13 with the conveyor belt 11. The other part accumulates on the side of the protrusion 16 away from the uphill section 13. When it accumulates to a certain amount, the thick sludge overcomes the upward force of the upper component 20 and presses down the protrusion 16, and continues to be conveyed with the conveyor belt 11. Then the protrusion 16 recovers and continues the separation of the thin and thick sludge, thus completing the initial solid-liquid separation.

[0026] Compared with the prior art, the mud conveying device for shield tunnels provided in this embodiment has the feature of blocking the mud flow by the protrusion 16 under the conveyor belt 11. The fluid slurry accumulates in front of the protrusion 16, and when its liquid level exceeds the overflow port 15 on the baffle 14, it overflows from the overflow port 15, thus achieving separation and discharge. Due to its larger particle size and viscosity, the thick sludge is mainly carried by the conveyor belt 11. With the "boost" of the protrusion 16 or its own inertia, part of it can pass over the protrusion 16 and continue to enter the uphill section 13 with the conveyor belt 11. The other part accumulates on the side of the protrusion 16 away from the uphill section 13. When it accumulates to a certain amount, the thick sludge overcomes the upward force of the upper component 20 and presses down the protrusion 16, and continues to be conveyed with the conveyor belt 11. Then the protrusion 16 recovers and continues the separation of the thin and thick sludge. With the baffle 14 blocking the conveyor component 10 on both sides, it not only prevents the thin sludge from slipping or flowing back in the uphill section 13, but also prevents the thin sludge from leaking from both sides of the conveyor belt 11.

[0027] In one possible implementation, the aforementioned top component 20 adopts, as shown in... Figure 1 , Figure 3 , Figure 5 and Figure 6 The structure shown is described in the following document. Figure 1 , Figure 3 , Figure 5 and Figure 6The upper support assembly 20 includes a connecting shaft 21, two sets of swing arms 23, two rotating rollers 24, and a counterweight 25. The connecting shaft 21 is mounted on the baffle 14 and extends horizontally along the conveying direction perpendicular to the conveyor belt 11. A rotating sleeve 22 is rotatably fitted around the outer periphery of the connecting shaft 21. The two sets of swing arms 23 are respectively mounted on both sides of the rotating sleeve 22. The two rotating rollers 24 are rotatably connected to the two sets of swing arms 23 in a one-to-one correspondence, and their main shafts are parallel to the main shaft of the connecting shaft 21. The counterweight 25 is mounted on one set of swing arms 23 and is used to lift the other set of swing arms 23 and cause the corresponding rotating roller 24 to be mounted on the top of the horizontal section 12.

[0028] Specifically, the counterweight 25 utilizes the gravitational potential energy as a power source, eliminating the need for additional electric or hydraulic drive devices. It features a simple and energy-efficient structure with high reliability, making it ideal for operation in damp and muddy tunnel environments with a low failure rate.

[0029] Through the lever principle of the counterweight 25 and the swing arm 23, the raised roller 24 is able to push against the conveyor belt 11 to form a protrusion 16.

[0030] Under the action of the counterweight 25, the swing arm 23 without the counterweight 25 (assumed to be group A) is lifted, so that the connected roller 24 is in a high position (ready to be lifted); the other swing arm 23 (group B) is in a low position. As the conveyor belt 11 moves, the roller 24 of group A is pressed by the conveyor belt 11 and the thick slag on it, causing the swing arm 23 of group B to swing upward, and the protrusion 16 disappears. After the thick slag at the protrusion 16 is conveyed away, the swing arm 23 without the counterweight 25 (group A) continues to lift, restoring the protrusion 16, and starting the next cycle, ensuring the separation effect of thin slag and thick slag.

[0031] Furthermore, the arrangement of the two rollers 24 ensures that the contact between any swing arm 23 and the conveyor belt 11 is a rolling engagement, thus avoiding damage to the conveyor belt 11.

[0032] In some embodiments, see Figure 6 One set of swing arms 23 has a groove 26 on its side wall. The groove 26 is set through the swing arm 23 along the axial direction of the connecting shaft 21. Several sets of grooves 26 are spaced apart along the length of the swing arm 23. One set of grooves 26 is embedded with a counterweight rod 27. The counterweight 25 is set on the counterweight rod 27.

[0033] Specifically, multiple counterweight installation positions (multiple slots 26) are provided. By inserting the counterweight rod 27 into the slots 26 at different positions, the length of the counterweight lever arm can be changed, thereby precisely adjusting the magnitude of the counterweight torque.

[0034] The required jacking force varies depending on the water content and viscosity of the mud. This design allows operators to easily adjust the jacking force to ensure that a sufficiently high protrusion 16 is formed to effectively block the thin slurry, while avoiding damage to the conveyor belt 11 or the device itself due to excessive force, thus enhancing the adaptability and adjustability of the device.

[0035] When the jacking force needs to be adjusted, the operator simply removes the counterweight rod 27 from its current slot 26, then inserts it into a slot 26 that is closer to the connecting shaft 21 (reducing the lever arm and jacking force) or further away from the connecting shaft 21 (increasing the lever arm and jacking force), and finally secures the counterweight 25. After adjustment, the device will automatically operate according to the new counterweight settings.

[0036] Furthermore, the counterweight 25 is provided with hooks for hooking onto the counterweight rod 27.

[0037] In one possible implementation, the baffle 14 described above adopts the following... Figure 1 and Figures 3 to 5 The structure shown is described in the following document. Figure 1 and Figures 3 to 5 The baffle 14 is provided with a filter plate 30 for sealing the overflow port 15, and the filter plate 30 is provided with filter holes 31.

[0038] Specifically, the filter plate 30 acts as a screen, which can perform secondary filtration on the overflowing thin sludge, intercepting any slightly larger particles and thick sludge that may be carried in it, and separating the thin sludge from the thick sludge.

[0039] The sludge overflowing from the overflow port 15 first encounters the filter plate 30. The liquid and fine particles in the sludge flow out through the filter holes 31, while solid particles larger than the filter holes 31 are blocked on the side of the filter plate 30 near the conveyor belt 11. The intercepted particles may be flushed back into the mud flow in the horizontal section 12 by the subsequent fluid and eventually carried away by the conveyor belt 11.

[0040] In some embodiments, see Figure 2 and Figure 4 A needle plate 40 is slidably connected to the baffle 14 along the conveying direction perpendicular to the conveyor belt 11. The needle plate 40 is located on the side of the filter plate 30 away from the conveyor belt 11. The needle plate 40 has a cleaning needle 41 that can be inserted into the filter hole 31 to clean the filter hole 31.

[0041] Specifically, filter holes 31 will inevitably become clogged by fine particles or sticky substances during long-term use, affecting overflow efficiency. The unclogging needle 41 can actively penetrate filter holes 31 to remove blockages, ensuring that filter holes 31 are unobstructed and guaranteeing the continuous and stable operation of the separation process.

[0042] The needle plate 40 slides periodically toward the filter plate 30, allowing the unclogging needle 41 to be precisely inserted into the filter hole 31, puncturing or pushing the blockage in the hole back to one side of the conveyor belt 11. Then the needle plate 40 retracts, and the filter hole 31 is cleared.

[0043] Furthermore, the needle plate 40 is provided with a long hole for the passage of thin slag.

[0044] In some embodiments, see Figure 2 and Figure 4 Two needle plates 40 are provided and are located on both sides of the central axis of the filter plate 30. A rotating rod 50 that can rotate horizontally is rotatably connected to the outer wall of the baffle 14. Both needle plates 40 are connected to the two ends of the rotating rod 50 through hinge rods 51. One end of the hinge rod 51 is hinged to the needle plate 40 and the other end is hinged to the end of the rotating rod 50. The two needle plates 40 can move towards each other or away from each other to clean the filter holes 31 alternately.

[0045] Specifically, two needle plates 40 are used alternately, instead of a single large needle plate 40 covering the entire filter plate 30. When one needle plate 40 moves forward to clean, the other needle plate 40 moves backward, ensuring that most of the filter hole area 31 is always exposed, allowing the thin sludge to flow out continuously. The cleaning work hardly affects the normal overflow function, realizing the parallel operation of cleaning and sludge discharge.

[0046] The simple mechanical structure of the rotating rod 50 and the hinge rod 51 ensures that the movement of the two needle plates 40 is completely synchronized and in opposite directions. Only one power source is needed to drive one side to achieve linkage between the two sides. The structure is ingenious and the control is simple.

[0047] When the rotating rod 50 is driven to rotate, it pulls the two needle plates 40 respectively through the hinge rods 51 at both ends. Due to the setting of the hinge point, the rotation of the rotating rod 50 causes one hinge rod 51 to pull one needle plate 40 forward (closer to the filter plate 30), while the other hinge rod 51 pushes the other needle plate 40 backward (away from the filter plate 30). On the next drive, the rotating rod 50 rotates in the opposite direction, and the movement direction of the two needle plates 40 is also reversed, realizing alternating cleaning.

[0048] In some embodiments, see Figure 2 and Figure 4 The outer wall of the baffle 14 is provided with guide posts 60 extending perpendicular to the surface of the baffle 14. There are two sets of guide posts 60, which are arranged one-to-one with the two needle plates 40. The needle plates 40 are slidably connected to the guide posts 60 through the connecting frame 61. One set of guide posts 60 is fitted with a tension spring 62 on its outer periphery. One end of the tension spring 62 is connected to the baffle 14, and the other end is connected to the connecting frame 61. The guide post 60 with tension spring 62 is provided with a drive assembly 70 for driving the connecting frame 61.

[0049] Specifically, the guide post 60 provides precise guidance for the sliding of the needle plate 40, ensuring that the unclogging needle 41 is accurately aligned with the filter hole 31 and preventing misalignment and jamming. The tension spring 62 provides the needle plate 40 with an automatic reset force, so that the needle plate 40 can reliably return to its initial position after the driving force is removed.

[0050] This structure clarifies the movement mode (sliding) and reset mechanism of the needle plate 40, providing a structural basis for the installation and function of the subsequent drive assembly 70.

[0051] The drive assembly 70 acts on one of the connecting brackets 61, pushing the needle plate 40 on that side to move towards the filter plate 30 for cleaning, overcoming the tension of the tension spring 62. When the driving force is removed, the contraction force of the tension spring 62 will pull the needle plate 40 back to its original position.

[0052] Furthermore, the hinge rod 51 is hinged to the connecting frame 61.

[0053] In some embodiments, see Figure 2 and Figure 4 The drive assembly 70 includes an iron block 71 and an electromagnet 72. The iron block 71 is disposed on the guide post 60 and located on the side of the connecting frame 61 away from the tension spring 62. The electromagnet 72 is disposed on the guide post 60 and located on the side of the iron block 71 away from the tension spring 62. The electromagnet 72 can attract the iron block 71 when energized or release the iron block 71 when de-energized.

[0054] Specifically, using an electromagnet 72 as the driving source, it can be controlled by a circuit, making it easy to achieve automated timed cleaning.

[0055] When the electromagnet 72 is energized, it generates a strong magnetic force, instantly attracting the iron block 71 and producing a rapid, impact-driven cleaning action, resulting in excellent unblocking performance. After the power is cut off, the magnetic force disappears, and the tension spring 62 quickly resets the mechanism. Energy consumption occurs only during the instant of action, making it energy-efficient and highly effective.

[0056] Compared to driving methods such as motors and cylinders, the electromagnet 72 driving structure is simpler, smaller in size, and has a faster response speed, making it suitable for frequent start-stop operations.

[0057] The control system energizes the electromagnet 72, which generates magnetic force and violently attracts the iron block 71. The iron block 71 drives one of the connecting frames 61 and the needle plate 40 to slide rapidly away from the filter plate 30 along the guide post 60. Under the linkage of the hinge rod 51 and the rotating rod 50, the other connecting frame 61 and the needle plate 40 slide rapidly towards the filter plate 30, completing half of the cleaning action of the filter plate 30.

[0058] The control system cuts off the power to the electromagnet 72, and the magnetic force disappears. At this time, the elastic restoring force of the tension spring 62 comes into play, quickly pulling the connecting bracket 61 and the needle plate 40 away from the filter plate 30 back to their initial positions, and causing the unclogging needle 41 to be inserted into the filter hole 31, completing the unclogging action of the other half of the filter plate 30.

[0059] By repeatedly switching the electromagnet 72 on and off, the movement directions of the two needle plates 40 are repeatedly reversed, achieving alternating cleaning. This not only ensures the smooth discharge of the sludge but also ensures the timely unclogging of the filter plate 30.

[0060] In some embodiments, see Figure 2 and Figure 4 The guide post 60 is provided with a mounting plate 80. The guide post 60 passes through the mounting plate 80 and is slidably connected to the mounting plate 80. The electromagnet 72 is provided on the mounting plate 80. The mounting plate 80 is provided with a locking member 81 for locking the axial position of the mounting plate 80.

[0061] Specifically, the electromagnet 72 is mounted on the guide post 60 via the mounting plate 80 and can slide and lock. This design allows adjustment of the initial distance (air gap) between the electromagnet 72 and the iron block 71.

[0062] Adjusting this distance optimizes the magnitude and efficiency of the electromagnetic attraction, ensuring that a sufficiently large impact force is generated to clear blockages.

[0063] When it is necessary to replace or repair the electromagnet 72, simply loosen the locking piece 81 to remove the entire mounting plate 80 along with the electromagnet 72, which is very convenient.

[0064] During debugging or maintenance, first loosen the locking piece 81 (bolt), then slide the mounting plate 80 along the guide post 60 to adjust it to the optimal distance between the electromagnet 72 and the iron block 71, and finally tighten the locking piece 81 to fix the mounting plate 80.

[0065] In one possible implementation, the baffle 14 described above adopts the following... Figure 1 and Figure 3 The structure shown is described in the following document. Figure 1 and Figure 3 A flow guide box 90 is provided on the outer wall of the baffle 14 below the overflow port 15, and a collection box 91 is provided on the outer side of the baffle 14 below the flow guide box 90 for collecting sludge.

[0066] Specifically, the flow guide box 90 can concentrate and guide the thin slag flowing out from the overflow port 15 and the filter plate 30, so as to prevent the thin slag from splashing everywhere and polluting the tunnel environment and working area.

[0067] The collection box 91 facilitates the centralized collection of the separated dilute residue. This dilute residue may contain useful components such as bentonite, which can be recycled and reused; or it may require unified environmental protection treatment (such as sedimentation and dehydration). This design provides convenience for subsequent treatment and reflects the design concept of environmental protection and recycling.

[0068] The separated sludge flows through the overflow port 15 and the filter plate 30 into the guide box 90, where it is collected and guided into the collection box 91 below. Once the collection box 91 is full, it is replaced or removed for disposal by staff.

[0069] Furthermore, overflow ports 15 are provided on both sides of the baffles 14 of the conveying component 10, and the two overflow ports 15 are arranged opposite to each other.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A slurry conveying device for shield tunnels, characterized in that, include: A conveying assembly includes a horizontally arranged conveyor belt comprising a horizontal section and an uphill section arranged sequentially along a conveying direction. Baffles are provided on both sides of the conveying assembly, and overflow ports are provided through the baffles above the horizontal sections. The upper lifting assembly is rotatably connected to the baffle and located inside the horizontal section. The upper lifting assembly can swing vertically to lift the top of the horizontal section so that an upwardly protruding part is formed on the conveying surface of the horizontal section. The protruding part is located on the side of the overflow port near the uphill section, which is used to block the sludge and allow the sludge to be discharged through the overflow port.

2. The slurry conveying device for shield tunnels as described in claim 1, characterized in that, The top component includes: A connecting shaft is disposed on the baffle and extends horizontally along the conveying direction perpendicular to the conveyor belt; a rotating sleeve is rotatably sleeved on the outer periphery of the connecting shaft. Two sets of swing arms are respectively disposed on both sides of the rotating sleeve; Two rotating rollers are rotatably connected to the two sets of swing arms in a one-to-one correspondence, and their main shafts are parallel to the main shafts of the connecting shafts; and A counterweight is provided on one of the sets of swing arms for lifting the other set of swing arms and causing the corresponding roller to push against the top of the horizontal section.

3. The slurry conveying device for shield tunnels as described in claim 2, characterized in that, One set of the swing arms has a groove on its side wall. The groove extends through the swing arm along the axial direction of the connecting shaft. Several sets of grooves are spaced apart along the length of the swing arm. A counterweight rod is embedded in one set of the grooves. The counterweight is mounted on the counterweight rod.

4. The slurry conveying device for shield tunnels as described in claim 1, characterized in that, The baffle is provided with a filter plate for sealing the overflow port, and the filter plate is provided with filter holes.

5. The slurry conveying device for shield tunnels as described in claim 4, characterized in that, A needle plate is slidably connected to the baffle along the conveying direction perpendicular to the conveyor belt. The needle plate is located on the side of the filter plate away from the conveyor belt, and the needle plate has a cleaning needle that can be inserted into the filter hole to clean the filter hole.

6. The slurry conveying device for shield tunnels as described in claim 5, characterized in that, The filter plate has two needle plates, which are located on both sides of the central axis of the filter plate. A rotating rod that can rotate horizontally is rotatably connected to the outer wall of the baffle. Both needle plates are connected to the two ends of the rotating rod through a hinge rod. One end of the hinge rod is hinged to the needle plate, and the other end is hinged to the end of the rotating rod. The two needle plates can move towards each other or away from each other to clean the filter holes alternately.

7. The slurry conveying device for shield tunnels as described in claim 6, characterized in that, The outer wall of the baffle is provided with guide posts extending perpendicular to the surface of the baffle. There are two sets of guide posts, which are arranged one-to-one with the two needle plates. The needle plates are slidably connected to the guide posts through a connecting frame. One set of guide posts is fitted with a tension spring on its outer periphery. One end of the tension spring is connected to the baffle, and the other end is connected to the connecting frame. The guide post with the tension spring is provided with a drive assembly for driving the connecting frame.

8. The slurry conveying device for shield tunnels as described in claim 7, characterized in that, The driving component includes: An iron block, disposed on the guide post and located on the side of the connecting frame away from the tension spring; and An electromagnet is disposed on the guide post and located on the side of the iron block away from the tension spring. The electromagnet can attract the iron block when energized or release the iron block when de-energized.

9. The slurry conveying device for shield tunnels as described in claim 8, characterized in that, The guide post is provided with a mounting plate, the guide post passes through the mounting plate and is slidably connected to the mounting plate, the electromagnet is provided on the mounting plate, and the mounting plate is provided with a locking member for locking the axial position of the mounting plate.

10. The slurry conveying device for shield tunnels as described in claim 1, characterized in that, The outer wall of the baffle is provided with a flow guide box located below the overflow port, and the outer side of the baffle is provided with a collection box located below the flow guide box for collecting the sludge.

Images