Deslagging device for shield construction of electric power tunnel

Abstract

The invention belongs to the technical field of electric power tunnel construction, and particularly provides an electric power tunnel shield construction deslagging device which comprises a slag feeding assembly, a transferring assembly and a slag pouring assembly, the slag pouring assembly comprises a muck container, a fixing frame, a first screw elevator, a second screw elevator and a lifting mechanism, and the muck container is used for storing muck generated by tunneling of a shield tunneling machine; when the muck container moves to the position below the second screw elevator, the lifting mechanism adjusts the height of the second screw elevator, so that the feeder of the second screw elevator can penetrate into the muck container, muck is conveyed to the feeding hopper from the muck container, then enters the first screw elevator from the feeding hopper, and then is conveyed to the ground from the top of the first screw elevator. The first screw elevator and the second screw elevator work cooperatively, the muck lifting work can be completed automatically, multiple steps of hooking, lifting and the like of a gantry crane are replaced, the muck lifting operation process can be simplified, dependence on manual operation is reduced, and the muck discharging efficiency and the automation degree are improved.

Description

Technical Field

[0001] This application belongs to the field of power tunnel construction technology, specifically a slag removal device for power tunnel shield construction. Background Technology

[0002] Electricity tunnels are an integral part of urban underground pipeline networks, enabling the laying of power cables. Compared to conventional subway tunnels, electricity tunnels are characterized by smaller diameters, shorter tunnel distances, shorter construction periods, and less muck removal.

[0003] In the construction of power tunnels using tunnel boring machines (TBMs), the efficiency and reliability of the muck removal system directly impact the overall project progress and cost. Currently, the widely used muck removal method relies on multi-stage mechanical transfer combined with gantry cranes for vertical lifting. Specifically, the muck produced by the TBM cutterhead cutting through the rock strata is first initially transported out by a screw conveyor at the rear of the TBM to waiting muck carts. The full muck carts travel along the tunnel track to the vicinity of the tunnel entrance, where they are then lifted by a gantry crane and raised to the ground. After being dumped above the muck pit, the empty carts are hoisted back into the tunnel for reuse. While this existing technology is widely used, its operation has inherent bottlenecks.

[0004] Existing technologies using gantry cranes for slag removal involve multiple independent steps, including hooking, lifting, moving, unloading, returning, and repositioning. The slag unloading process is cumbersome, and steps such as hooking, unhooking, and moving are highly dependent on manual labor, making it difficult to automate slag unloading. Summary of the Invention

[0005] Based on the above-mentioned technical problems, this application provides a slag removal device for shield tunnel construction in power tunnels, in order to solve the problems of high dependence on manual labor and low degree of automation in multiple steps of the gantry crane slag removal process in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide a muck removal device for shield tunneling in power transmission, comprising a muck loading assembly, a transfer assembly, and a muck dumping assembly arranged sequentially from the shield tunneling position to the tunnel exit position; the muck dumping assembly includes: A slag container having a receiving cavity for storing slag, the receiving cavity having an opening at the top; A mounting bracket is installed at the tunnel exit. The first spiral elevator is vertically mounted on the fixed frame, with the bottom of the first spiral elevator being the feed end and the feed end being connected to a feed hopper; The second screw conveyor is vertical and slides in conjunction with the fixed frame. The top of the second screw conveyor is the discharge end, located above the feed hopper. The bottom of the second screw conveyor is the feed end, equipped with a feeder and a first driving member. The feeder rotates in conjunction with the bottom of the second screw conveyor. The feeder has multiple guiding channels along its circumference, with the inlet side of each channel located outside the feeder and the outlet side communicating with the inner cavity of the second screw conveyor. The cross-section of the guiding channels gradually narrows along the feeding direction. The first driving member drives the feeder to rotate around the axis of the second screw conveyor. A lifting mechanism, located on the fixed frame, is used to drive the second spiral elevator to lift.

[0007] In one possible implementation, the transfer component is an electric vehicle capable of moving within the shield tunnel, and the muck container is located on the electric vehicle.

[0008] In one possible implementation, the first screw conveyor and the second screw conveyor are spaced apart in the horizontal direction; the bottom of the feed hopper is connected to the bottom of the first screw conveyor via a first screw conveyor, and the top of the second screw conveyor is connected to a second screw conveyor; both the first screw conveyor and the second screw conveyor are horizontal, and the discharge end of the second screw conveyor extends above the feed hopper.

[0009] In one possible implementation, the sidewall at the bottom of the second screw conveyor is provided with a plurality of feed inlets spaced apart along the circumferential direction; the feeder includes: A fixed plate is disposed above the feed inlet and rotates in conjunction with the second screw conveyor; and Multiple arc-shaped guide plates are respectively disposed below the fixed plate. The guide plates are disposed in adjacent positions of the two feed inlets. One end of the guide plate is connected to the outer wall of the second screw conveyor, and the guide channel is formed between two adjacent guide plates.

[0010] In one possible implementation, the receiving cavity is square, and the second screw elevator is provided with a guide rail along the long axis of the receiving cavity; The slag removal assembly also includes: Two pusher plates are arranged opposite to the second screw conveyor. The pusher plates are slidably engaged with the guide rail. The bottom of each pusher plate is flush with the bottom of the feeder. The line connecting the two pusher plates is parallel to the long axis of the slag container. A material gathering mechanism is used to drive the two pusher plates to move along the guide rails respectively.

[0011] In one possible implementation, the slag-applying component includes: A spiral feeder is inclinedly installed at the shield tunneling position, located behind the shield cutterhead, with its bottom serving as the feed end; and The slag conveyor belt is installed along the length of the shield tunnel. The loading end of the slag conveyor belt is located below the discharge end of the screw feeder, and the unloading end of the slag conveyor belt is located above the transfer assembly.

[0012] In one possible implementation, the spiral feeder includes: The inner cylinder is inclined, and the side wall of the inner cylinder has multiple filter holes that penetrate its own wall thickness. The bottom of the inner cylinder forms a feed end, and the top has a discharge port. An outer cylinder is coaxially sleeved around the outer periphery of the inner cylinder. The filter holes are connected to the inner cavity of the outer cylinder. An annular sealing plate is provided between the bottom of the outer cylinder and the inner cylinder. A drain pipe connected to the inner cavity of the outer cylinder is provided at the bottom of the outer cylinder. The feeding screw is coaxially disposed in the inner cavity of the inner cylinder; An extrusion plate is placed over the discharge port; and A preload spring is provided on the side of the extrusion plate away from the inner cylinder, and the preload spring is configured with a preload force to press the extrusion plate against the discharge port.

[0013] In one possible implementation, a scraper is provided below the discharge end of the slag conveyor belt for contacting the conveyor belt.

[0014] In one possible implementation, the transfer assembly consists of multiple conveying units arranged sequentially along the shield tunnel, wherein the feed end of the conveying unit adjacent to the shield excavation position is located below the discharge end of the slag loading assembly, and the discharge end of the conveying unit adjacent to the tunnel exit position is located above the slag container.

[0015] In one possible implementation, the conveying unit is a belt conveyor, with the discharge end of the preceding conveying unit located above the loading end of the following conveying unit in the conveying direction.

[0016] Compared with existing technologies, the beneficial effects of the muck removal device for shield tunneling in this application are: The muck removal device for shield tunneling in this application includes a muck loading assembly, a transfer assembly, and a muck dumping assembly. The muck dumping assembly includes a muck container, a fixed frame, a first spiral elevator, a second spiral elevator, and a lifting mechanism. The muck container stores the muck generated during shield tunneling. When the muck container moves below the second spiral elevator, the lifting mechanism adjusts the height of the second spiral elevator so that its feeder can penetrate deep into the muck container, transporting the muck from the container to the feed hopper, and then from the feed hopper into the first spiral elevator. Subsequently, the muck is transported from the top of the first spiral elevator to the ground. The first and second spiral elevators work together to automatically complete the muck lifting operation, replacing the hooking and lifting steps of a gantry crane. This simplifies the muck lifting process, reduces reliance on manual operation, and improves muck removal efficiency and automation. The second spiral elevator feeds muck through a feeder at its bottom. As the feeder rotates, the guide channel sweeps the muck from the side wall of the container into the second spiral elevator, achieving automated feeding. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the slag removal device and shield tunnel for power tunnel shield construction provided in this application; Figure 2 A partial enlarged view of the muck removal device for power tunnel shield construction provided in this application at the shield excavation location; Figure 3 Schematic diagram of the slag removal component Figure 1 ; Figure 4 Schematic diagram of the slag removal component Figure 2 ; Figure 5 for Figure 4 Enlarged view of part A in the middle; Figure 6 Schematic diagram of the structure of the second spiral elevator, pusher plate and material gathering mechanism. Figure 1 ; Figure 7 Schematic diagram of the structure of the second spiral elevator, pusher plate and material gathering mechanism. Figure 2 ; Figure 8 This is a schematic diagram of the screw feeder. Figure 9 This is a partial sectional view of the screw feeder; Explanation of reference numerals in the attached figures: 10. Slag feeding assembly; 11. Screw feeder; 111. Inner cylinder; 112. Outer cylinder; 1121. Drain pipe; 113. Feeding screw; 114. Extrusion plate; 115. Pre-tension spring; 12. Slag conveyor belt; 20. Transfer assembly; 30. Slag dumping assembly; 31. Slag container; 32. Fixing frame; 33. First screw elevator; 331. Feed hopper; 332. First screw transferor; 34. Second screw elevator; 341. Second screw transferor; 342. Feeder; 3421. Fixing plate; 3422. Guide plate; 343. First driving component; 35. Lifting mechanism; 36. Pushing plate; 37. Gathering mechanism. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] Please refer to the following: Figures 1 to 9The following describes the slag removal device for shield tunneling in power tunnels provided in the embodiments of this application.

[0025] This application provides a muck removal device for shield tunneling in power transmission, comprising a muck loading assembly 10, a transfer assembly 20, and a muck dumping assembly 30 arranged sequentially from the shield tunneling position to the tunnel exit position. The muck loading assembly 10 transports the muck generated by the shield machine to the transfer assembly 20, which then transfers the muck along the shield tunnel to the tunnel exit. The muck dumping assembly 30 lifts the muck from the tunnel exit to the ground.

[0026] Specifically, the slag dumping assembly 30 includes a slag container 31, a fixed frame 32, a first screw conveyor 33, a second screw conveyor 34, and a lifting mechanism 35. The slag container 31 has a receiving cavity for storing slag, with an opening at the top. The fixed frame 32 is located at the tunnel exit. The first screw conveyor 33 is vertically mounted on the fixed frame 32, with its bottom serving as the feed end connected to a feed hopper 331. The second screw conveyor 34 is vertical and slides in cooperation with the fixed frame 32. The top of the second screw conveyor 34 is the discharge end, located above the feed hopper 331, and its bottom is the feed end, equipped with a feeder 342 and a lifting mechanism 35. A driving component 343; a feeder 342 is rotatably engaged with the bottom of the second screw conveyor 34, the feeder 342 has multiple guiding channels formed along its circumference, the inlet side of the guiding channel is located on the outside of the feeder 342, the outlet side of the guiding channel is connected to the inner cavity of the second screw conveyor 34, and the cross section of the guiding channel gradually shrinks along the feeding direction; the first driving component 343 is used to drive the feeder 342 to rotate around the axis of the second screw conveyor 34; the lifting mechanism 35 is provided on the fixed frame 32 and is used to drive the second screw conveyor 34 to lift.

[0027] Compared with the prior art, the beneficial effects of the muck removal device for shield tunneling in power tunnels provided in this application are: The slag removal device for shield tunneling in this application includes a slag loading assembly 10, a transfer assembly 20, and a slag dumping assembly 30. The slag dumping assembly 30 includes a slag container 31, a fixing frame 32, a first spiral elevator 33, a second spiral elevator 34, and a lifting mechanism 35. The slag container 31 is used to store the slag generated by the shield machine during tunneling. When the slag container 31 moves below the second spiral elevator 34, the lifting mechanism 35 adjusts the height of the second spiral elevator 34 so that its feeder 342 can penetrate deep into the slag container 31, transporting the slag from the slag container 31 to the feed hopper 331, and then from the feed hopper 331 into the first spiral elevator 33, and subsequently from the top of the first spiral elevator 33 to the ground. The first spiral elevator 33 and the second spiral elevator 34 work together to automatically complete the slag lifting work, replacing the hooking and lifting steps of a gantry crane, which helps to simplify the slag lifting operation process, reduce reliance on manual operation, and improve slag removal efficiency and automation. The second spiral elevator 34 is fed with slag through the feeder 342 at the bottom. When the feeder 342 rotates, the guide channel sweeps the slag from the side wall of the container into the second spiral elevator 34, realizing automated feeding.

[0028] The muck loading assembly 10 and the transfer assembly 20 are used to transport the muck generated during the tunnel boring machine's cutterhead excavation to the tunnel exit. The muck container 31 stores the muck. When the muck container 31 is below the second screw conveyor 34, the lifting mechanism 35 drives the second screw conveyor 34 to descend, lifting the muck in the muck container 31 to the ground surface. The muck loading assembly 10 and the transfer assembly 20 can be existing conveying equipment such as belt conveyors, scraper conveyors, and screw conveyors.

[0029] The fixed frame 32 is welded from structural steel and has a sliding sleeve. The first spiral elevator 33 is fixed to the fixed frame 32, and the second spiral elevator 34 is slidably mounted on the fixed frame 32 via the sliding sleeve, rollers, and chute. The second spiral elevator 34 is designed to be liftable, allowing its bottom to enter the slag container 31 for slag lifting. It also adapts to different tunnel depths (e.g., 5m, 7m). When the shield tunnel is deeper (e.g., 12m), two first spiral elevators 33 can be connected vertically. The lower first spiral elevator 33 can transfer the slag from the second spiral elevator 34 to the feed hopper 331 of the upper first spiral elevator 33. After the slag is lifted to the ground, it can be transferred to a slag pit for storage using a belt conveyor or other equipment.

[0030] The slag container 31 can be made of welded steel plates. The cavity can be cuboid or cylindrical. The top of the cavity is open, so that the second screw elevator 34 can enter the cavity under the drive of the lifting mechanism 35.

[0031] The dimensions of the slag container 31 can be designed according to the slag flow rate, with a length, width, and height of 3m × 1.5m × 1.5m. The bottom of the container can be designed as conical or flat. When designed as conical, it facilitates the accumulation of slag at the lowest point.

[0032] The feeder 342 is located at the bottom of the second screw conveyor 34. The feeder 342 is disc-shaped and is driven to rotate by the first drive component 343 (such as a servo motor or hydraulic motor). The speed is adjustable from 5 to 20 rpm. There are 4 to 6 material guiding channels, which are evenly distributed. The cross-section of the channel gradually decreases from the inlet to the outlet (e.g., inlet width 200 mm, outlet width 100 mm), and a tapering design is used to guide the slag into the channel.

[0033] The lifting mechanism 35 can be a hydraulic cylinder, an electric screw, or a winch. The lifting stroke of the lifting mechanism 35 can be designed according to the depth of the slag container 31, for example, 2-4m. When the lifting mechanism 35 descends, the feeder 342 rotates synchronously, collecting the slag in the slag container 31 into the second screw elevator 34.

[0034] There are no specific restrictions on the height, diameter, speed, and conveying flow rate of the first spiral elevator 33 and the second spiral elevator 34; users can set these parameters according to their actual needs. To ensure smooth slag discharge, the operating parameters of the first spiral elevator 33 and the second spiral elevator 34 should be as consistent as possible.

[0035] Please see Figure 1 The transfer component 20 is an electric vehicle capable of moving within the shield tunnel. The excavated soil container 31 is fixedly or detachably mounted on the vehicle. The electric vehicle can be a battery-powered rail vehicle capable of moving along rails laid within the shield tunnel. Furthermore, the electric vehicle can also transport other materials besides excavated soil (such as tunnel segments).

[0036] As another feasible implementation, the transfer assembly 20 consists of multiple conveying units arranged sequentially along the shield tunnel. The feed end of the conveying unit near the shield excavation position is located below the discharge end of the slag loading assembly 10, while the discharge end of the conveying unit near the tunnel exit position is located above the slag container 31. Specifically, the conveying unit is a belt conveyor, 20-80m in length, and inclined relative to the horizontal plane. In the conveying direction, the discharge end of the preceding conveying unit is 0.5-1m higher than the feed end of the following conveying unit, utilizing gravity for material discharge. Adjacent conveying units are connected by supports. Multiple conveying units relay transport achieves long-distance coverage and continuous slag discharge.

[0037] The conveying unit is an existing belt conveyor, including rollers, motors, conveyor belts, tensioning structures, etc., and the conveyor belt is made of rubber.

[0038] Please see Figure 3 , Figure 4 and Figure 5 In some possible embodiments, the first spiral elevator 33 and the second spiral elevator 34 are arranged horizontally at intervals, with a spacing of 1-3m; the bottom of the feed hopper 331 is connected to the bottom of the first spiral elevator 33 via a first spiral conveyor 332, and the top of the second spiral elevator 34 is connected to a second spiral conveyor 341; both the first spiral conveyor 332 and the second spiral conveyor 341 are horizontal, and the discharge end of the second spiral conveyor 341 extends above the feed hopper 331. The material flow direction is as follows: Figure 5 As indicated by the arrows, the first spiral conveyor 332 and the second spiral conveyor 341 are relatively short in length and are used to realize the horizontal transportation of materials, so that the materials discharged from the discharge end of the second spiral elevator 34 can be smoothly transferred to the feed end of the first spiral elevator 33.

[0039] Please see Figure 6 and Figure 7 In some possible embodiments, the sidewall at the bottom of the second screw conveyor 34 is provided with multiple feed ports (specifically 4-6) spaced apart along the circumferential direction; the feeder 342 includes a fixed plate 3421 and a guide plate 3422. The fixed plate 3421 is located above the feed ports and rotates with the second screw conveyor 34; multiple arc-shaped guide plates 3422 are respectively located below the fixed plate 3421, and the guide plates 3422 are correspondingly located at adjacent positions of two feed ports. One end of the guide plate 3422 is connected to the outer wall of the second screw conveyor 34, and a guide channel is formed between two adjacent guide plates 3422.

[0040] In this embodiment, the feeder 342 includes a fixed plate 3421 and a guide plate 3422. The fixed plate 3421 is an annular steel plate, rotatably connected to the shaft of the second screw conveyor 34 via bearings (such as rolling bearings). The guide plate 3422 is an arc-shaped steel plate made of wear-resistant material, welded below the fixed plate 3421. The rotation diameter of the guide plate 3422 is adapted to the width of the slag container 31, and the height of the guide plate 3422 can be 200-500mm. A guide channel is formed between adjacent guide plates 3422. During the rotation of the feeder 342, slag is swept in from the inlet of the guide channel and reaches the interior of the second screw conveyor 34 along the arc surface of the guide channel. The first driving component 343 can be a geared motor, which drives the fixed plate 3421 to rotate via gear or belt transmission.

[0041] Please see Figure 3 , Figure 4 , Figure 6 and Figure 7In some possible embodiments, the receiving cavity is square, and the second screw conveyor is provided with a guide rail along the long axis of the receiving cavity. The guide rail is made of steel. The slag dumping assembly 30 also includes a pusher plate 36 and a material gathering mechanism 37. The two pusher plates 36 are arranged opposite to the second screw conveyor. The pusher plates 36 are slidably engaged with the guide rail. The bottom of the pusher plates 36 is flush with the bottom of the feeder 342. The line connecting the two pusher plates 36 is parallel to the long axis of the slag container 31. The material gathering mechanism 37 is used to drive the two pusher plates 36 to move along the guide rail respectively.

[0042] The pusher plates 36 are made of wear-resistant material. The maximum distance between the two pusher plates 36 corresponds to the length of the receiving cavity. As the pusher plates 36 move along the long axis of the container, the slag is pushed from both sides towards the central feeder 342, preventing slag accumulation at the edge of the receiving cavity and improving the slag removal rate. The material gathering mechanism 37 can be a hydraulic cylinder or an electric telescopic rod. The stroke of the material gathering mechanism 37 covers the long axis of the slag container 31. In actual use, the material gathering mechanism 37, lifting mechanism 35, and other drive equipment can be automatically operated by a PLC control program.

[0043] During the excavated soil lifting operation, the excavated soil is first transferred from the shield tunneling position to the tunnel exit position via the transfer component 20. The excavated soil is stored in the excavated soil container 31. When the control system detects that the excavated soil container 31 is directly below the second spiral elevator 34 through existing position detection sensors such as position sensors and limit switches, the control system sends a command to the dumping component 30, and the first spiral elevator 33, the second spiral elevator 34, and the first drive component 343 are all activated. The lifting mechanism 35 extends to drive the second spiral elevator 34 to descend. During the descent, the excavated soil directly below the feeder 342 is swept into the second spiral elevator 34 through the feeder 342. At the same time, the material gathering mechanism 37 drives the two pusher plates 36 to move closer together, gathering the excavated soil on both sides towards the center position. After the two pusher plates 36 move to the closest distance, the material gathering mechanism 37 drives the two pusher plates 36 to move away from each other, waiting for the next material gathering command.

[0044] It should be noted that the control of the above-mentioned moving parts can be achieved through manual operation or by combining with existing PLC control programs to achieve automatic or semi-automatic control. The specific PLC control signal transmission path, the type of sensor used, the signal triggering conditions, and the control strategies related to the action sequence of each mechanism are existing technologies, which should be understandable and implementable by those skilled in the art, and will not be elaborated here.

[0045] Please see Figure 2 , Figure 8 and Figure 9 In some possible embodiments, the slag loading assembly 10 includes a screw feeder 11 and a slag conveyor belt 12.

[0046] The auger feeder 11 is inclinedly positioned at the shield tunneling location, behind the shield cutterhead, with its bottom serving as the feed end. The muck conveyor belt 12 is positioned along the length of the shield tunnel, with its feed end below the discharge end of the auger feeder 11 and its discharge end above the transfer assembly 20. The auger feeder 11 lifts the muck generated by the shield machine from a low position to the height of the muck conveyor belt 12, which then transports the muck to the muck container 31 on the transfer assembly 20. The muck conveyor belt 12 is a belt conveyor, and a chute can be installed at its discharge end to guide the muck into the muck container 31 on the transfer assembly 20. When the muck conveyor belt 12 is long, it can be equipped with a tensioning device and a deviation corrector, as is common in the prior art.

[0047] Please see Figure 8 and Figure 9 In some possible embodiments, the screw feeder 11 includes an inner cylinder 111, an outer cylinder 112, an extrusion plate 114, a preload spring 115, and a feeding screw 113. The inner cylinder 111 is inclined, and its sidewalls have multiple filter holes that penetrate its own wall thickness. The bottom of the inner cylinder 111 forms a feed end, and the top has a discharge port. The outer cylinder 112 is coaxially sleeved on the outer periphery of the inner cylinder 111. The filter holes communicate with the inner cavity of the outer cylinder 112. An annular sealing plate is provided between the bottom of the outer cylinder 112 and the inner cylinder 111. The bottom of the outer cylinder 112 is provided with a drain pipe 1121 that communicates with its own inner cavity. The feeding screw 113 is coaxially arranged in the inner cavity of the inner cylinder 111. The extrusion plate 114 covers the discharge port. The preload spring 115 is located on the side of the extrusion plate 114 away from the inner cylinder 111, and the preload spring 115 is configured with a preload force to press the extrusion plate 114 against the discharge port.

[0048] In this embodiment, the extrusion plate 114 and the spring form a pressure-controlled discharge mechanism. Under the action of the pre-tightening force, the extrusion plate 114 presses against the discharge port. The extruded soil is squeezed out of water by the extrusion plate 114 and the feeding screw 113. The squeezed water passes through the filter holes and enters the inner cavity of the outer cylinder 112, and is finally discharged from the drain pipe 1121. Replacing the pre-tightening spring 115 with different specifications can change the pre-tightening force, thereby adjusting the degree of extrusion and dewatering of the soil. The drain pipe 1121 can be connected to a sewage container for centralized treatment, keeping the working environment inside the tunnel dry. There are no specific restrictions on the number, diameter, and arrangement of the filter holes; users can set them according to their actual conditions.

[0049] A scraper is installed below the discharge end of the slag conveyor belt 12 to remove slag adhering to the conveyor belt and keep it clean. Related components in contact with the slag can be made of wear-resistant materials or designed to be detachable for timely replacement if damaged.

[0050] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present invention specification has recorded each combined embodiment and can support different combined embodiments.

[0051] The above description is only a preferred embodiment of the present invention and is 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 muck removal device for shield tunneling in power transmission lines, characterized in that, The system includes a muck loading assembly (10), a transfer assembly (20), and a muck dumping assembly (30) arranged sequentially from the shield tunneling position to the tunnel exit position; the muck dumping assembly (30) includes: The slag container (31) has a receiving cavity for storing slag, the receiving cavity being open at the top; The fixing frame (32) is located at the tunnel exit. The first spiral elevator (33) is vertically mounted on the fixed frame (32). The bottom of the first spiral elevator (33) is the feeding end and the feeding end is connected to the feeding hopper (331). The second spiral elevator (34) is vertical and slides in cooperation with the fixed frame (32); the top of the second spiral elevator (34) is the discharge end, which is located above the feed hopper (331), and the bottom of the second spiral elevator (34) is the feed end, which is provided with a feeder (342) and a first drive member (343); the feeder (342) rotates in cooperation with the bottom of the second spiral elevator (34), and the feeder (342) has multiple guide channels along its circumference. The inlet side of the guide channel is located outside the feeder (342), and the outlet side of the guide channel is connected to the inner cavity of the second spiral elevator (34). The cross-section of the guide channel gradually shrinks along the feeding direction; the first drive member (343) is used to drive the feeder (342) to rotate around the axis of the second spiral elevator (34); and A lifting mechanism (35) is provided on the fixed frame (32) for driving the second spiral elevator (34) to lift.

2. The muck removal device for shield tunneling in electric power tunnels according to claim 1, characterized in that, The transfer component (20) is an electric vehicle that can move inside the shield tunnel, and the slag container (31) is located on the electric vehicle.

3. The muck removal device for shield tunneling in electric power tunnels according to claim 1, characterized in that, The first screw conveyor (33) and the second screw conveyor (34) are arranged at intervals in the horizontal direction; the bottom of the feed hopper (331) is connected to the bottom of the first screw conveyor (33) through the first screw conveyor (332), and the top of the second screw conveyor (341) is connected to the second screw conveyor (341); the first screw conveyor (332) and the second screw conveyor (341) are both in a horizontal state, and the discharge end of the second screw conveyor (341) extends to the top of the feed hopper (331).

4. The muck removal device for shield tunneling in power transmission tunnels according to claim 1, characterized in that, The second screw conveyor (34) has multiple feed inlets spaced apart along the circumferential direction on the side wall at its bottom; the feeder (342) includes: A fixed plate (3421) is disposed above the feed inlet and rotates in conjunction with the second screw conveyor (34); and Multiple arc-shaped guide plates (3422) are respectively disposed below the fixed plate (3421). The guide plates (3422) are disposed in adjacent positions of the two feed inlets. One end of the guide plate (3422) is connected to the outer wall of the second screw conveyor (34). The guide channel is formed between two adjacent guide plates (3422).

5. The muck removal device for shield tunneling in power transmission tunnels according to claim 1, characterized in that, The receiving cavity is square, and the second spiral elevator (34) is provided with a guide rail along the long axis of the receiving cavity; The slag removal assembly (30) also includes: Two pusher plates (36) are arranged opposite to the second screw conveyor (34). The pusher plates (36) are slidably engaged with the guide rail. The bottom of the pusher plates (36) is flush with the bottom of the feeder (342). The line connecting the two pusher plates (36) is parallel to the long axis of the slag container (31). The material gathering mechanism (37) is used to drive the two pusher plates (36) to move along the guide rail respectively.

6. The slag removal device for shield tunneling in electric power tunnels according to claim 1, characterized in that, The slag loading assembly (10) includes: A spiral feeder (11) is inclinedly installed at the shield tunneling position and located behind the shield cutterhead, with the bottom of the spiral feeder (11) serving as the feed end; and The slag conveyor belt (12) is set along the length of the shield tunnel. The loading end of the slag conveyor belt (12) is located below the discharge end of the screw feeder (11), and the unloading end of the slag conveyor belt (12) is located above the transfer assembly (20).

7. The muck removal device for shield tunneling in power transmission tunnels according to claim 6, characterized in that, The spiral feeder (11) includes: The inner cylinder (111) is inclined and has multiple filter holes that penetrate its own wall thickness on its side wall. The bottom of the inner cylinder (111) forms a feed end and the top has a discharge port. The outer cylinder (112) is coaxially sleeved on the outer periphery of the inner cylinder (111). The filter hole is connected to the inner cavity of the outer cylinder (112). An annular sealing plate is provided between the bottom of the outer cylinder (112) and the inner cylinder (111). The bottom of the outer cylinder (112) is provided with a drain pipe (1121) connected to its own inner cavity. The feeding screw (113) is coaxially disposed in the inner cavity of the inner cylinder (111); An extrusion plate (114) is disposed over the discharge port; and A preload spring (115) is provided on the side of the extrusion plate (114) away from the inner cylinder (111), and the preload spring (115) is configured with a preload force to press the extrusion plate (114) against the discharge port.

8. The muck removal device for shield tunneling in electric power tunnels according to claim 6, characterized in that, The discharge end of the slag conveyor belt (12) is provided with a scraper for contacting the conveyor belt.

9. The muck removal device for shield tunneling in power transmission tunnels according to claim 1, characterized in that, The transfer assembly (20) consists of multiple conveying units arranged sequentially along the shield tunnel. The feeding end of the conveying unit near the shield excavation position is located below the discharge end of the slag loading assembly (10), and the discharge end of the conveying unit near the tunnel exit position is located above the slag container (31).

10. The muck removal device for shield tunneling in electric power tunnels according to claim 9, characterized in that, The conveying unit is a belt conveyor, and in the conveying direction, the discharge end of the previous conveying unit is located above the loading end of the next conveying unit.

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