A kind of for shield machine slag conveying device

Abstract

The application belongs to the field of shield machines, and particularly relates to a slag conveying device for a shield machine, which comprises a screw conveyor, the bottom output end of the screw conveyor is connected with a mixing box, the end of the mixing box away from the screw conveyor is provided with a slurry pump, a series pipe is connected between the mixing box and the slurry pump, a water inlet pipe is connected to the outside of the mixing box, and the output end of the slurry pump is connected with a sludge discharge pipe. Through the arrangement of the slurry pump, the accumulated slag can be transported upwards along with the rotation of the screw, and then falls into the mixing box. The water inlet pipe is one branch of the main water pipe, and can continuously inject water source into the mixing box, so as to increase the fluidity of the slag. The mixed slag in the mixing box is pumped out by the slurry pump and transported outward. This method only needs to build a conveying pipeline, and compared with a conveying belt, the pipeline has a smaller volume, and the slag will not scatter in the conveying process. The extension of the pipeline is more convenient than the lengthening of the conveying belt.

Description

Technical Field

[0001] This invention belongs to the field of tunnel boring machines, specifically a device for conveying excavated soil in tunnel boring machines. Background Technology

[0002] A tunnel boring machine (TBM) is a type of tunnel boring machine that uses the shield tunneling method. The shield tunneling construction method involves the tunnel boring machine constructing the "shield" (referring to supporting segments) of the tunnel while excavating. The basic working principle of a TBM is that a cylindrical steel component advances along the tunnel axis while excavating the soil.

[0003] During the excavation process of a tunnel boring machine (TBM), the broken rock face at the front end needs to be continuously transported outwards. Therefore, traditional TBMs require a special conveying device for transporting excavated soil. The excavated soil needs to be transported to the surface and then sorted into rock and soil.

[0004] Traditional construction waste transportation typically involves transporting crushed construction waste to a higher location and then using a conveyor belt to move it outwards. However, as the tunnel boring machine (TBM) continues to advance, not only does the conveyor belt need to be continuously extended, but the mixing of mud and water during the crushing process also causes the construction waste to come into contact with the surface of the conveyor belt, making it difficult to move the construction waste outwards afterward.

[0005] Therefore, the present invention provides a device for conveying excavated soil in tunnel boring machines. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a device for conveying excavated soil for a tunnel boring machine, including a screw conveyor, a mixing box connected to the bottom output end of the screw conveyor, a mud pump installed at the end of the mixing box away from the screw conveyor, a series pipe connecting the mixing box and the mud pump, a water inlet pipe connected to the outside of the mixing box, a crushing component installed on the inside of the mixing box for crushing excavated soil, and a mud discharge pipe connected to the output end of the mud pump.

[0008] By using a mud pump and tilting the screw conveyor, the screw inside passes through the bottom of the conveyor. The tunnel boring machine's (TBM) scraper cuts through the rock wall in front, and the crushed excavated soil falls to the bottom. A gap is left between the scraper and the front wall of the TBM, and the screw is located in this gap. As the screw rotates, it transports the accumulated excavated soil upwards, which then falls into the mixing tank. During the excavation process, the TBM needs to continuously spray water onto the scraper surface to soften the soil layer. Therefore, a main water pipe needs to be connected from the outside. The inlet pipe is a branch of the main water pipe, which can continuously inject water into the mixing tank to increase the fluidity of the excavated soil. The mud pump then pumps the mixed excavated soil out of the mixing tank and transports it outwards. This method only requires the construction of a transport pipeline, which is smaller in volume than a conveyor belt and prevents the excavated soil from scattering during transportation. Moreover, extending the pipeline is more convenient than lengthening a conveyor belt.

[0009] Preferably, the mixing box is hollow inside. The crushing component includes a crushing plate located on the inner side of the mixing box near the top. A horizontally arranged filter plate is fixed to the middle of the mixing box. Multiple holes are opened on the top surface of the filter plate. A power component for driving the crushing plate is provided on the outer side of the crushing plate. Since medium-sized stones are still left in the crushed slag, in order to reduce congestion and ensure the overall fluidity of the slag, the slag will first fall onto the top of the filter plate when it enters the mixing box. Then, driven by the power component, the crushing plate will move horizontally back and forth to crush the slag, reducing large stones. Only stones smaller than the holes will fall to the bottom, thus ensuring the fluidity of the slag transportation.

[0010] Preferably, the power assembly includes two parallel hydraulic rods, the ends of which are fixedly connected to the top of the crushing plate. One end of each hydraulic rod passes through the mixing chamber and is connected to a sleeve. The bottom of the crushing plate is slidably engaged with the top surface of the filter plate. The hydraulic rods drive the crushing plate to reciprocate. Since the bottom of the crushing plate is embedded in the filter plate, it prevents the crushing plate from shifting during the crushing process. The sleeve is used to limit the horizontal state of the hydraulic rod at the other end. With this configuration, the crushing plate moves continuously in the mixing chamber without affecting the continuous feeding of the slag above.

[0011] Preferably, the end of the sludge discharge pipe is provided with two split valves, each of which has three connecting pipes, and each of the three connecting pipes is equipped with a valve. One of the split valves is connected to the sludge discharge pipe, and the output end of the other split valve is connected to a drain pipe. An extension pipe is connected between the two split valves. Since the tunnel boring machine needs to move forward continuously, the entire spiral conveyor and mixing box need to move with the tunnel boring machine. The excavated soil being transported outward needs to be discharged to a fixed location. The final discharge point is connected through the drain pipe, which does not move. The extension pipe can continuously extend during the movement of the tunnel boring machine to adapt to its forward movement. The three outlets of the split valves are interconnected, and the three outlets can be opened or closed at will through the valves.

[0012] Preferably, the extension pipe consists of three steel pipes connected by bends made of flexible material. The three steel pipes are arranged in parallel, with a coffered pipe connecting one of the bends at the end to a split valve. The two split valves are initially in contact with each other, and the extension pipe is initially bent. As the end of the tunnel boring machine moves forward, the multiple bends are gradually straightened, eventually forming a straight line between the three steel pipes to adapt to the forward movement of the tunnel boring machine. The coffered pipe is made of flexible material and can be bent to a large extent. In the initial state, the coffered pipe wraps around the extension pipe by half a circle, allowing the distance between the two split valves to be adjusted arbitrarily.

[0013] Preferably, the bottom of the extension tube is provided with a translation rail, the top moving end of the translation rail is connected to a moving seat, the top of the moving seat is fixedly connected to a servo motor, the driving end of the servo motor is fixedly connected to a fixing claw, and baffles are fixedly connected to both sides of the translation rail. In order to ensure that the extension tube can be unfolded in an orderly manner, the fixing claw is used to fix the steel tube located in the middle of the three steel tubes. During the advance of the mud pump, the servo motor drives the middle steel tube to rotate, and at the same time the translation rail drives the fixing claw to move horizontally, so that the extension tube can be unfolded stably.

[0014] Preferably, an air pump is fixedly connected inside the mud pump, and the output end of the air pump is connected to an air pressure pipe. An air inlet valve is connected to the top of the connecting pipe. When the extension pipe is nearly fully extended, the split valve and the drain pipe are removed, and the outlet of the split valve is closed. A certain amount of mud can be stored in both the mixing tank and the mud pump. After removal, the front extension pipe is bent first, so that a larger space is created between the split valve and the drain pipe, allowing the installation of a new extension pipe and split valve. After installation, as the tunnel boring machine continues to advance, the newly added split valve is not extended initially, allowing the front extension pipe to be fully extended. Afterwards, connect an additional pipe between the other two connecting pipes of the two adjacent split valves. The additional pipe is a rigid metal pipe. Change the passage of the two split valves so that the excavated soil goes through the rigid metal pipe. At the same time, connect the air pressure pipe to the air inlet valve, start the air pump, and introduce air into the extension pipe. This will push the excavated soil in the extension pipe backwards. Then the extension pipe can be removed. The removed extension pipe can be bent and reused. In this way, during the entire operation of the tunnel boring machine, only two extension pipes are needed to achieve the effect of continuously extending the pipeline as the tunnel boring machine moves forward. Moreover, the replacement of the pipe with an all-metal rigid pipe makes it more durable.

[0015] Preferably, a diffusion hood is fixedly connected between the bottom output end of the screw conveyor and the mixing box, and linearly distributed protrusions are fixedly connected to both sides of the crushing plate. The diffusion hood allows the slag from the screw conveyor to be transferred to the mixing box more effectively, and the protrusions assist in the crushing process, breaking the slag into smaller pieces.

[0016] Preferably, the filter plate is inclined, and the top of the water inlet pipe is inclined upward and connected to the inner top of the mixing box. The inclined water inlet pipe allows the incoming water to continuously flush the filter plate from bottom to top, so that the slag produced during the crushing process will not block the holes on the filter plate, allowing the slag to be better mixed with the water flow and flow into the series pipe under the suction.

[0017] Preferably, a power plate and a flange are fixedly connected to both ends of the steel pipe, and a flange is also fixedly connected to the end of the surrounding pipe. Multiple fixing rods are connected through the surface of the power plate, and multiple electric wheels that movably fit against the surface of the fixing rods are provided on the inner side of the power plate. The extension pipe can also be left undisassembled. After the extension pipe is fully extended, the electric wheels in the power plate are activated to insert the fixing rods into the flanges. The surface of the fixing rods is threaded, and the surfaces of the electric wheels and the fixing rods are inclined. The fixing rods rotate forward to connect with the flanges by threads. This gives the entire extension pipe a certain rigidity and makes it less prone to bending.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The present invention discloses a soil conveying device for a tunnel boring machine (TBM). Through the installation of a mud pump, a screw conveyor is inclined, with its internal screw passing through the bottom of the conveyor. The TBM's scraper cuts through the rock wall in front, and the pulverized soil falls to the bottom. A gap remains between the scraper and the front wall of the TBM, and the screw is located in this gap. As the screw rotates, it transports the accumulated soil upwards, which then falls into a mixing tank. During the excavation process, the TBM needs to continuously spray water onto the scraper surface to soften the soil layer. Therefore, a main water pipe needs to be connected from the outside. The inlet pipe is a branch of the main water pipe, continuously injecting water into the mixing tank to increase the fluidity of the soil. The mud pump then pumps the mixed soil from the mixing tank out and transports it externally. This method only requires the construction of a transport pipeline, which is smaller in volume than a conveyor belt and prevents soil from scattering during transport. Furthermore, extending the pipeline is more convenient than lengthening a conveyor belt.

[0020] 2. The present invention provides a device for conveying excavated soil for tunnel boring machines. By setting a crushing plate, when the excavated soil enters the mixing box, it first falls to the top of the filter plate. Then, driven by the power component, the crushing plate will move horizontally back and forth to crush the excavated soil, reducing large stones. Only stones smaller than the holes will fall to the bottom, thus ensuring the fluidity of the excavated soil during transportation. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a perspective view of the screw conveyor and mud pump of the present invention;

[0024] Figure 3 This is a perspective view of the spiral conveyor and mixing box of the present invention;

[0025] Figure 4 This is a cross-sectional view of the mixing box of the present invention;

[0026] Figure 5 This is a perspective view of the translation rail and extension tube of the present invention;

[0027] Figure 6 This is a perspective view of the extension tube of the present invention;

[0028] Figure 7 This is a perspective view of the power plate and flange of the present invention;

[0029] In the diagram: 1. Screw conveyor; 2. Mixing tank; 3. Mud pump; 4. Horizontal rail; 5. Extension pipe; 6. Drain pipe; 7. Water inlet pipe; 8. Series pipe; 9. Mud discharge pipe; 10. Pneumatic pipe; 11. Hydraulic rod; 12. Diffuser; 15. Crushing plate; 16. Sleeve; 17. Filter plate; 18. Splitting valve; 19. Steel pipe; 20. Bend; 21. Fixing claw; 22. Baffle; 23. Connecting pipe; 24. Air inlet valve; 25. Flange; 26. Fixing rod; 27. Enclosure pipe; 28. Power plate. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention provides a device for conveying excavated soil for a tunnel boring machine, comprising a screw conveyor 1, a mixing tank 2 connected to the bottom output end of the screw conveyor 1, a mud pump 3 provided at the end of the mixing tank 2 away from the screw conveyor 1, a series pipe 8 connecting the mixing tank 2 and the mud pump 3, a water inlet pipe 7 connected to the outside of the mixing tank 2, a crushing component provided on the inside of the mixing tank 2 for crushing excavated soil, and a mud discharge pipe 9 connected to the output end of the mud pump 3.

[0032] During operation, traditional construction waste transportation typically involves transporting the crushed construction waste to a high place and then using a conveyor belt to move the waste outwards. However, as the tunnel boring machine continues to advance, it is necessary to continuously extend the conveyor belt. Furthermore, because the construction waste is mixed with mud and water during the crushing process, the construction waste comes into contact with the surface of the conveyor belt, making it difficult to move the construction waste outwards afterward.

[0033] With the mud pump 3 installed, the screw conveyor 1 is tilted, and its internal screw passes through the bottom of the screw conveyor 1. The shield machine's scraper will chisel through the rock wall in front, and the crushed soil will fall to the bottom. There will be a certain gap between the scraper and the front wall of the shield machine, and the screw is located in the gap. As the screw rotates, it can transport the accumulated soil upward and then drop it into the mixing box 2. During the excavation process, the shield machine needs to continuously spray water onto the surface of the scraper to soften the soil layer. Therefore, a main water pipe needs to be connected from the outside. The water inlet pipe 7 is one of the branches of the main water pipe, which can continuously inject water into the mixing box 2 to increase the fluidity of the soil. The mud pump 3 will pump out the mixed soil from the mixing box 2 and transport it outward. This method only requires the construction of a transportation pipeline, which is smaller in volume than a conveyor belt and will not allow the soil to scatter during transportation. Moreover, the extension of the pipeline is more convenient than the extension of the conveyor belt.

[0034] like Figures 1 to 4As shown, the interior of the mixing box 2 is hollow. The crushing component includes a crushing plate 15, which is located on the inner side of the mixing box 2 near the top. A horizontally arranged filter plate 17 is fixed to the middle of the mixing box 2. Multiple holes are opened on the top surface of the filter plate 17. A power component for driving the crushing plate 15 is provided on the outer side of the crushing plate 15.

[0035] During operation, since medium-sized stones still remain in the crushed slag, in order to reduce congestion and ensure the overall fluidity of the slag, the slag first falls to the top of the filter plate 17 when it enters the mixing box 2. Then, driven by the power component, the crushing plate 15 will move horizontally back and forth to crush the slag, reducing large stones. Only stones smaller than the holes will fall to the bottom, thus ensuring the fluidity of the slag transportation.

[0036] like Figures 2 to 6 As shown, the power assembly includes two parallel hydraulic rods 11, the ends of which are fixed to the top of the crushing plate 15. One end of the hydraulic rod 11 passes through the mixing box 2 and is connected to a sleeve 16. The bottom of the crushing plate 15 is slidably engaged with the top surface of the filter plate 17.

[0037] During operation, the hydraulic rod 11 drives the crushing plate 15 to reciprocate. Since the bottom of the crushing plate 15 is embedded in the filter plate 17, it prevents the crushing plate 15 from deviating during the crushing process. The sleeve 16 is used to limit the horizontal state of the hydraulic rod 11 at the other end. With this setting, the crushing plate 15 moves continuously in the mixing box 2 without affecting the continuous feeding of the slag above.

[0038] like Figures 2 to 6 As shown, the end of the sludge discharge pipe 9 is provided with two split valves 18. Each split valve 18 has three connecting pipes 23, and each of the three connecting pipes 23 is provided with a valve. One of the split valves 18 is connected to the sludge discharge pipe 9, and the output end of the other split valve 18 is connected to the drain pipe 6. An extension pipe 5 is connected between the two split valves 18.

[0039] During operation, since the tunnel boring machine needs to move forward continuously, the entire spiral conveyor 1 and mixing box 2 need to move with the tunnel boring machine. The excavated soil being transported outward needs to be discharged to a fixed location. The final discharge point is connected through the drain pipe 6. The drain pipe 6 does not move. The extension pipe 5 can continuously extend during the movement of the tunnel boring machine to adapt to its forward movement. The three outlets of the split valve 18 are interconnected, and the three outlets can be closed or opened at will through the valve.

[0040] like Figures 2 to 6As shown, the extension pipe 5 is composed of three steel pipes 19, and adjacent steel pipes 19 are connected by a bend 20. The bend 20 is made of flexible material. The three steel pipes 19 are arranged in parallel. One of the bends 20 at the end is connected to a surrounding pipe 27 between it and the split valve 18. The two split valves 18 are initially in contact with each other.

[0041] During operation, the extension pipe 5 is initially set in a curved shape. As the end of the tunnel boring machine moves forward, multiple bends 20 are gradually straightened from the curved state, so that the three steel pipes 19 eventually form a straight line to adapt to the forward movement of the tunnel boring machine. The cofferdam 27 is made of flexible material and can be bent to a large extent. In the initial state, the cofferdam 27 surrounds the extension pipe 5 half a circle, allowing the distance between the two split valves 18 to be adjusted at will.

[0042] like Figures 2 to 6 As shown, the bottom of the extension tube 5 is provided with a translation rail 4, the top moving end of the translation rail 4 is connected to a moving seat, the top of the moving seat is fixedly connected to a servo motor, the driving end of the servo motor is fixedly connected to a fixing claw 21, and baffles 22 are fixedly connected to both sides of the translation rail 4.

[0043] To ensure that the extension tube 5 can be deployed in an orderly manner, the middle steel tube 19 among the three steel tubes 19 is fixed with the fixing claw 21. As the mud pump 3 moves forward, the middle steel tube 19 is rotated by the servo motor, and at the same time the translation rail 4 drives the fixing claw 21 to move horizontally, so that the extension tube 5 can be deployed stably.

[0044] like Figures 2 to 6 As shown, an air pump is fixedly connected inside the mud pump 3, and the output end of the air pump is connected to an air pressure pipe 10. An air inlet valve 24 is connected to the top of the connecting pipe 23.

[0045] During operation, when the extension pipe 5 is nearly fully extended, disconnect the split valve 18 from the drain pipe 6, and simultaneously close the outlet of the split valve 18. A certain amount of mud can be stored in both the mixing tank 2 and the mud pump 3. After disconnection, bend the front extension pipe 5 first, creating a larger space between the split valve 18 and the drain pipe 6, allowing for the installation of the new extension pipe 5 and split valve 18. After installation, as the tunnel boring machine advances, do not extend the newly added split valve 18 initially. Allow the front extension pipe 5 to be fully straightened before connecting the other two adjacent split valves 18. An auxiliary pipe is connected between pipes 23. The auxiliary pipe is a rigid metal pipe. The passage of the two split valves 18 is changed so that the slag flows through the rigid metal pipe. At the same time, the air pressure pipe 10 is connected to the air inlet valve 24, the air pump is started, and air is introduced into the extension pipe 5. This pushes the slag in the extension pipe 5 backward, so the extension pipe 5 can be removed. The removed extension pipe 5 can be bent and reused. In this way, only two extension pipes 5 are needed during the entire operation of the tunnel boring machine to achieve the effect of continuously extending the pipeline as the tunnel boring machine moves forward. Moreover, the replacement of the pipe with an all-metal rigid pipe makes it more durable.

[0046] like Figures 2 to 6 As shown, a diffuser 12 is fixedly connected between the bottom output end of the spiral conveyor 1 and the mixing box 2, and linearly distributed protrusions are fixedly connected to both sides of the crushing plate 15.

[0047] During operation, the diffuser 12 allows the slag from the screw conveyor 1 to be transferred to the mixing box 2 more effectively, and the protrusions assist in the crushing process, breaking the slag into smaller pieces.

[0048] like Figures 2 to 6 As shown, the filter plate 17 is inclined, the top of the water inlet pipe 7 is inclined upward and connected to the inner top of the mixing box 2;

[0049] During operation, the upward-sloping water inlet pipe 7 allows the incoming water to continuously flush the filter plate 17 from bottom to top, preventing the slag produced during the crushing process from clogging the holes on the filter plate 17. This allows the slag to better mix with the water flow and flow into the series pipe 8 under suction.

[0050] like Figure 7 As shown, a power plate 28 and a flange 25 are fixedly connected to both ends of the steel pipe 19, and a flange 25 is also fixedly connected to the end of the surrounding pipe 27. Multiple fixing rods 26 are connected through the surface of the power plate 28, and multiple electric wheels that are movably fitted to the surface of the fixing rods 26 are provided on the inner side of the power plate 28.

[0051] The extension tube 5 can also be left undisassembled. After the extension tube 5 is fully extended, the electric wheel in the power disc 28 is activated to insert the fixing rod 26 into the flange 25. The surface of the fixing rod 26 is threaded. The electric wheel and the surface of the fixing rod 26 are inclined. The fixing rod 26 moves forward in a rotating manner, thereby connecting with the flange 25 by threads. This gives the entire extension tube 5 a certain rigidity and makes it less prone to bending.

[0052] During operation, with the mud pump 3 installed and the screw conveyor 1 tilted, the screw inside passes through the bottom of the screw conveyor 1. The scraper of the tunnel boring machine will chisel through the rock wall in front, and the crushed soil will fall to the bottom. There will be a certain gap between the scraper and the front wall of the tunnel boring machine. The screw is located in the gap. As the screw rotates, it can transport the accumulated soil upward and then drop it into the mixing box 2. During the excavation process, the tunnel boring machine needs to continuously spray water onto the surface of the scraper to soften the soil layer. Therefore, a main water pipe needs to be connected from the outside. The water inlet pipe 7 is one of the branches of the main water pipe, which can continuously inject water into the mixing box 2 to increase the fluidity of the soil. The mud pump 3 pumps out the mixed soil in the mixing box 2 and transports it outward. This method only requires the construction of a transportation pipeline, which is smaller in volume than a conveyor belt and will not allow the soil to scatter during transportation. Moreover, the extension of the pipeline is more convenient than the extension of the conveyor belt.

[0053] Since medium-sized stones are still left in the crushed slag, in order to reduce congestion and ensure the overall fluidity of the slag, when the slag enters the mixing box 2, it will first fall to the top of the filter plate 17. Then, driven by the power component, the crushing plate 15 will move horizontally back and forth to crush the slag, reduce large stones, and only stones smaller than the holes will fall to the bottom, thus ensuring the fluidity of the slag transportation.

[0054] The hydraulic rod 11 drives the crushing plate 15 to reciprocate. Since the bottom of the crushing plate 15 is embedded in the filter plate 17, it prevents the crushing plate 15 from deviating during the crushing process. The sleeve 16 is used to limit the horizontal state of the hydraulic rod 11 at the other end. With this setting, the crushing plate 15 moves continuously in the mixing box 2 without affecting the continuous feeding of the slag above.

[0055] Since the tunnel boring machine needs to move forward continuously, the entire spiral conveyor 1 and mixing box 2 need to move with the tunnel boring machine. The excavated soil transported outward needs to be discharged to a fixed place. The final discharge point is connected through the drain pipe 6. The drain pipe 6 does not move. The extension pipe 5 can be continuously extended during the movement of the tunnel boring machine to adapt to the forward movement of the tunnel boring machine. The three outlets of the split valve 18 are interconnected, and the three outlets can be closed or opened at will through the valve.

[0056] The extension pipe 5 is initially set in a curved shape. As the end of the tunnel boring machine moves forward, multiple bends 20 are gradually straightened from the curved state, so that the three steel pipes 19 eventually form a straight line to adapt to the forward state of the tunnel boring machine. The cofferdam 27 is made of flexible material and can be bent to a large extent. In the initial state, the cofferdam 27 surrounds the extension pipe 5 half a circle, allowing the distance between the two split valves 18 to be adjusted at will.

[0057] To ensure that the extension tube 5 can be deployed in an orderly manner, the middle steel tube 19 among the three steel tubes 19 is fixed with the fixing claw 21. As the mud pump 3 moves forward, the middle steel tube 19 is rotated by the servo motor, and at the same time the translation rail 4 drives the fixing claw 21 to move horizontally, so that the extension tube 5 can be deployed stably.

[0058] When the extension pipe 5 is nearly fully extended, disconnect the split valve 18 from the drain pipe 6, and simultaneously close the outlet of the split valve 18. A certain amount of mud can be stored in both the mixing tank 2 and the mud pump 3. After disconnection, bend the front extension pipe 5 first, creating a larger space between the split valve 18 and the drain pipe 6, allowing for the installation of the new extension pipe 5 and split valve 18. After installation, as the tunnel boring machine advances, do not extend the newly added split valve 18 initially. Allow the front extension pipe 5 to be fully straightened before connecting the other two connecting pipes 2 of the two adjacent split valves 18. An additional pipe is connected between 3. The additional pipe is a rigid metal pipe. The passage of the two split valves 18 is changed so that the slag can pass through the rigid metal pipe. At the same time, the air pressure pipe 10 is connected to the air inlet valve 24. The air pump is started to introduce air into the extension pipe 5. This pushes the slag in the extension pipe 5 backward. The extension pipe 5 can then be removed. The removed extension pipe 5 can be bent and reused. In this way, only two extension pipes 5 are needed during the entire operation of the tunnel boring machine to achieve the effect of continuously extending the pipeline as the tunnel boring machine moves forward. Moreover, the replacement of the pipe with an all-metal rigid pipe makes it more durable.

[0059] The diffuser hood 12 allows the excavated soil from the screw conveyor 1 to be transferred to the mixing box 2 more effectively. The protrusions assist in the crushing process, breaking the excavated soil into smaller pieces.

[0060] The upward-sloping water inlet pipe 7 allows the incoming water to continuously flush the filter plate 17 from bottom to top, preventing the slag produced during the crushing process from clogging the holes on the filter plate 17, allowing the slag to mix better with the water flow, and flowing into the series pipe 8 under the suction.

[0061] The extension tube 5 can also be left undisassembled. After the extension tube 5 is fully extended, the electric wheel in the power disc 28 is activated to insert the fixing rod 26 into the flange 25. The surface of the fixing rod 26 is threaded. The electric wheel and the surface of the fixing rod 26 are inclined. The fixing rod 26 moves forward in a rotating manner, thereby connecting with the flange 25 by threads. This gives the entire extension tube 5 a certain rigidity and makes it less prone to bending.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for conveying excavated soil in a tunnel boring machine, characterized in that: The system includes a screw conveyor (1), a mixing tank (2) connected to the bottom output end of the screw conveyor (1), a mud pump (3) provided at the end of the mixing tank (2) away from the screw conveyor (1), a series pipe (8) connected between the mixing tank (2) and the mud pump (3), a water inlet pipe (7) connected to the outside of the mixing tank (2), a crushing component provided on the inside of the mixing tank (2), the crushing component being used to crush slag and soil, and a mud discharge pipe (9) connected to the output end of the mud pump (3). The end of the sludge discharge pipe (9) is provided with two split valves (18). The split valve (18) has three connecting pipes (23). Each of the three connecting pipes (23) is equipped with a valve. One of the split valves (18) is connected to the sludge discharge pipe (9), and the output end of the other split valve (18) is connected to the drain pipe (6). An extension pipe (5) is connected between the two split valves (18). The extension pipe (5) consists of three steel pipes (19), and adjacent steel pipes (19) are connected by a bend (20). The bend (20) is made of flexible material. The three steel pipes (19) are arranged in parallel. One of the bends (20) at the end is connected to the split valve (18) by a surrounding pipe (27). The two split valves (18) are initially attached to each other. The bottom of the extension tube (5) is provided with a translation rail (4), the top moving end of the translation rail (4) is connected to a moving seat, the top of the moving seat is fixedly connected to a servo motor, the driving end of the servo motor is fixedly connected to a fixed claw (21), and baffles (22) are fixedly connected to both sides of the translation rail (4). An air pump is fixed inside the mud pump (3), and the output end of the air pump is connected to an air pressure pipe (10). An air inlet valve (24) is connected to the top of the connecting pipe (23).

2. The device for conveying excavated soil for a tunnel boring machine according to claim 1, characterized in that: The mixing box (2) is hollow inside. The crushing component includes a crushing plate (15). The crushing plate (15) is located on the inner side of the mixing box (2) near the top. A horizontally arranged filter plate (17) is fixed in the middle of the mixing box (2). Multiple holes are opened on the top surface of the filter plate (17). A power component for driving the crushing plate (15) is provided on the outer side of the crushing plate (15).

3. A device for conveying excavated soil for a tunnel boring machine according to claim 2, characterized in that: The power assembly includes two parallel hydraulic rods (11), the ends of which are fixed to the top of the crushing plate (15). One end of the hydraulic rod (11) passes through the mixing box (2) and is connected to a sleeve (16). The bottom of the crushing plate (15) is slidably engaged with the top surface of the filter plate (17).

4. A device for conveying excavated soil for a tunnel boring machine according to claim 3, characterized in that: A diffuser hood (12) is fixed between the bottom output end of the spiral conveyor (1) and the mixing box (2), and linearly distributed protrusions are fixed on both sides of the crushing plate (15).

5. A device for conveying excavated soil for a tunnel boring machine according to claim 4, characterized in that: The filter plate (17) is inclined, and the top of the water inlet pipe (7) is inclined upward and connected to the inner top of the mixing box (2).

6. A device for conveying excavated soil for a tunnel boring machine according to claim 5, characterized in that: The two ends of the steel pipe (19) are respectively fixed with a power plate (28) and a flange (25), and the end of the surrounding pipe (27) is also fixed with a flange (25). Multiple fixing rods (26) are connected through the surface of the power plate (28), and multiple electric wheels that are movably attached to the surface of the fixing rods (26) are provided on the inner side of the power plate (28).

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