Tunnel boring machine slurry discharge pump mechanism and method

Abstract

The application discloses a tunnel boring machine used slurry discharging pump mechanism and slurry discharging method, which comprises a cutter head, characterized in that the cutter head is connected to a shield machine main body; a spiral material discharging mechanism is connected to the inside of the shield machine main body, and a material inlet end of the spiral material discharging mechanism is located in a slurry tank. Through the speed difference between the slurry and the solid slag, the slurry and the solid slag will gradually be separated along the spiral machine shaft in the spiral machine cylinder, the solid slag is deposited and accumulated in the interval area formed between adjacent pushing pieces, the separation effect of the slurry and the solid slag is good, the multiple mud suction pipes arranged can suck out the slurry in the transportation process in the spiral material discharging mechanism, the slurry content in the spiral machine can be effectively reduced, the operation power of the spiral machine conveying the slurry with a large amount of solid particles is reduced, and the equipment loss and operation cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel boring machine, in particular to a slurry discharge pump mechanism and method for tunnel boring machine. BACKGROUND

[0002] The tunnel boring machine is a special equipment for underground tunnel excavation, which can quickly and efficiently excavate and remove earthwork, commonly known as shield machine. The commonly used shield machine is divided into earth pressure balance shield machine and slurry balance shield machine. The working principle of the earth pressure balance shield machine is that the cutter head cuts the soil layer, and the cut soil enters the soil cabin. The soil in the soil cabin balances with the pressure of the excavation face, and the soil is discharged by the screw conveyor in the soil cabin. The soil discharge device of the discharge port continuously discharges soil in a balanced state of the discharge amount and the propulsion amount. The working principle of the slurry balance shield machine is that the cutter head and the rear partition plate form a sealed slurry chamber, and the slurry chamber is injected with appropriate pressure slurry to form a mud film on the excavation face, supporting the front soil body to realize the stability of the excavation face. The cutter head cuts the soil body, and the soil and slurry are mixed to form high-density slurry, which is transported to the ground by the slurry pump and pipeline for treatment.

[0003] The existing tunnel boring machine excavation method is mostly one of earth pressure balance or slurry balance. Due to the large geological changes in the tunnel crossing area at the present stage, the single excavation mode shield machine is prone to excavation difficulty in a large number of complex sections. The change of geology often causes poor slurry discharge effect, which affects the construction period. Although there are some shields that combine the earth pressure balance and slurry balance excavation modes, the soil discharge method is only a simple combination, which consumes a lot of energy. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and a slurry discharge pump mechanism and method for tunnel boring machine are provided, which comprises a cutter head connected to a shield machine body, and further comprises:

[0005] A spiral discharge mechanism is connected inside the shield machine body. The inlet end of the spiral discharge mechanism is located in the slurry chamber for discharging the soil from the slurry chamber. The outlet end of the spiral discharge mechanism is located on the conveyor belt. A recovery mechanism is arranged below the conveyor belt.

[0006] A slurry discharge pipeline is connected with a plurality of mud suction pipes. A slurry discharge pump is arranged on the mud suction pipe. One end of the mud suction pipe is connected with the spiral discharge mechanism. The plurality of mud suction pipes are used to suck the slurry in the spiral discharge mechanism. A pressure regulating chamber is arranged at the outlet end of the slurry discharge pipeline. The pressure regulating chamber is used to reduce the pressure fluctuation of the liquid discharge.

[0007] An auxiliary slurry discharge assembly is connected to the slurry outlet pipe at one end, and is used to directly draw slurry from the slurry sump.

[0008] A plurality of push pieces are arranged on the screw shaft of the screw discharge mechanism, and a separation zone is formed between adjacent push pieces, and the separation zone is used to reduce the pressure of the slurry pushed by the push pieces.

[0009] As a further description of the above technical solution: the auxiliary slurry discharge assembly includes a connecting pipe, one end of the connecting pipe is connected to the slurry outlet pipe, and the slurry outlet pipe is connected to the first auxiliary slurry discharge pipe on both sides. Each first auxiliary slurry discharge pipe is connected to a second auxiliary slurry discharge pipe on one side, the inlet end of the first auxiliary slurry discharge pipe is located on one side of the cutter head, the inlet end of the second auxiliary slurry discharge pipe is located in the slurry sump, and a valve body is arranged on the first auxiliary slurry discharge pipe and the second auxiliary slurry discharge pipe.

[0010] As a further description of the above technical solution: the recovery mechanism includes a water collecting tank, the water collecting tank is located below the conveying belt, the water collecting tank is connected to the overflow tank through an overflow pipe, the overflow tank is provided with a control tank on one side, the overflow tank is provided with a water pump and a liquid level meter inside, and the water pump is connected to the slurry sump through a water pipe.

[0011] As a further description of the above technical solution: the control tank is provided with a water pumping tank on one side, and the water pumping tank is used to pump water into the overflow tank.

[0012] As a further description of the above technical solution: the screw discharge mechanism is provided with a discharge port at one end, and the discharge port is provided with an adjusting plate on one side.

[0013] As a further description of the above technical solution: a one-way valve is arranged on each mud pumping pipe, and a pressure sensor is arranged between adjacent mud pumping pipes, and one end of the pressure sensor is connected to the screw discharge mechanism.

[0014] As a further description of the above technical solution: the first auxiliary slurry discharge pipe and the second auxiliary slurry discharge pipe are both provided with two, and the two first auxiliary slurry discharge pipes are symmetrically distributed on both sides of the connecting pipe.

[0015] As a further description of the above technical solution: the mud pumping pipe adopts an arc-shaped high-pressure hose, and the two ends of the mud pumping pipe are respectively connected to the screw discharge mechanism and the slurry outlet pipe through quick couplings.

[0016] Another object of the present application is to provide a slurry discharge method for a tunnel boring machine, which specifically comprises the following steps:

[0017] S1, the cutter head rotates to cut the soil layer in the tunnel, and the cuttings fall into the slurry sump;

[0018] S2, the water pump draws the dilute slurry inside the overflow tank into the slurry tank, so that the sludge and the dilute slurry are mixed;

[0019] S3, the spiral discharging mechanism transports the slurry tank sludge through the front end of the spiral conveyor to the end, and falls into the conveying belt through the discharge port and is conveyed to the outside of the tunnel;

[0020] S4, the remaining slurry on the conveying belt falls into the recycling mechanism below for recycling.

[0021] As a further description of the above technical solution: in step S3, the spiral discharging mechanism transports the slurry carrying a large amount of solid particles, and the plurality of mud suction pipes can suck the slurry in the transportation process in the spiral discharging mechanism.

[0022] The above technical solution has the following advantages or beneficial effects:

[0023] 1. The plurality of mud suction pipes can suck the slurry in the transportation process in the spiral discharging mechanism, which can effectively reduce the slurry content in the spiral machine, thereby reducing the running power of the spiral machine conveying a large amount of solid particle-containing slurry, and reducing the equipment loss and operating cost.

[0024] 2. The water pump passes the dilute slurry inside the overflow tank into the slurry tank through the water pipe, the sludge and the dilute slurry are mixed, the carrying capacity of the spiral conveyor is effectively improved, the remaining slurry on the conveying belt falls into the water collecting tank below for recycling, the recycling capacity is enhanced, and resources are saved.

[0025] 3. The plurality of mud suction pipes can suck the slurry in different areas, which can speed up the suction efficiency, the external pipe is in the shape of an arc, which can reduce the impact of the slurry on the equipment, the inner cavities of the plurality of mud suction pipes are not connected to each other, the mud suction pipes output only from the inner cavities of the slurry outlet pipes after collecting the slurry, and the structure of the external pipe is very convenient to maintain and replace. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural diagram of the slurry discharge pump mechanism in an embodiment of the present application;

[0027] Figure 2 is a side view of the slurry discharge pump mechanism in an embodiment of the present application;

[0028] Figure 3 is a top view of the slurry discharge pump mechanism in an embodiment of the present application;

[0029] Figure 4 is Figure 2 is a structural diagram of the mud suction pipe in the slurry discharge pump mechanism;

[0030] Figure 5 isFigure 2 Structure diagram of a recovery mechanism in a slurry discharge pump mechanism;

[0031] Figure 6 For Figure 2 Structure diagram of a screw discharge mechanism in a slurry discharge pump mechanism;

[0032] Figure 7 For Figure 2 Structure diagram of an auxiliary slurry discharge assembly in a slurry discharge pump mechanism;

[0033] Figure 8 For Figure 2 Structure diagram of an auxiliary slurry discharge assembly in another embodiment of a slurry discharge pump mechanism.

[0034] Legend:

[0035] 1, shield machine body; 2, cutterhead; 3, screw discharge mechanism; 4, slurry tank; 5, slurry outlet pipeline; 6, mud suction pipe; 7, slurry discharge pump; 8, auxiliary slurry discharge assembly; 9, conveyor belt; 10, recovery mechanism; 11, pressure regulating chamber; 12, one-way valve; 13, pressure sensor; 14, quick coupling; 31, push piece; 32, partition area; 33, discharge port; 34, adjusting plate; 81, first auxiliary slurry discharge pipe; 82, second auxiliary slurry discharge pipe; 83, connecting pipe; 101, water collecting tank; 102, overflow tank; 103, control tank; 104, water pump; 105, liquid level meter; 106, water pipe; 107, water suction tank; 108, overflow pipe. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "vertical", "upper", "lower", "horizontal" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Embodiment one:

[0040] As Figures 1-8 shown, the tunneling machine of the present application with slurry pump mechanism, including cutterhead 2, cutterhead 2 is connected on the shield machine body 1, it also includes: spiral discharge mechanism 3, spiral discharge mechanism 3 is connected inside the shield machine body 1, spiral discharge mechanism 3 inlet end is located in the slurry tank 4, for discharging the muck in the slurry tank 4, spiral discharge mechanism 3 discharge end is located on the conveying belt 9, the conveying belt 9 below is provided with recovery mechanism 10;Slurry outlet pipe 5, a plurality of mud suction pipes 6 are connected on slurry outlet pipe 5, slurry pump 7 is arranged on mud suction pipe 6, one end of mud suction pipe 6 is connected with spiral discharge mechanism 3, a plurality of mud suction pipes 6 are used for pumping out the slurry in spiral discharge mechanism 3, the outlet end of slurry outlet pipe 5 is provided with pressure regulating chamber 11, pressure regulating chamber 11 is used for reducing the pressure fluctuation of liquid discharge;Auxiliary slurry discharge assembly 8, one end of auxiliary slurry discharge assembly 8 is connected with slurry outlet pipe 5, auxiliary slurry discharge assembly 8 is used for pumping out slurry from slurry tank 4 directly;A plurality of push pieces 31 are arranged on the spiral shaft of spiral discharge mechanism 3, the adjacent push pieces 31 form a separation zone 32, the separation zone 32 is used for reducing the pressure of the slurry pushed by push piece 31.

[0041] In the embodiment, the cutter head 2 rotates to cut the soil layer in the tunnel, and the cuttings fall into the slurry tank 4. The slurry carrying a large amount of solid particles in the soil tank enters the spiral discharging mechanism 3 through the spiral machine inlet. The slurry has good flowability in the spiral machine cylinder, and is more easily transported than the solid, especially the large particle block solid. Due to the speed difference between the slurry and the solid, the slurry and the solid gradually separate along the axial direction of the spiral machine in the spiral machine cylinder. The solid is deposited and accumulated in the separation area 32 formed between the adjacent pushing pieces 31. The separation effect of the slurry and the solid is good. The multiple mud suction pipes 6 are arranged to suck the slurry in the transportation process in the spiral discharging mechanism 3, which can effectively reduce the slurry content in the spiral machine, thereby reducing the running power of the spiral machine for transporting the slurry carrying a large amount of solid particles, reducing the equipment loss and operation cost, continuously discharging the slurry, and greatly improving the equipment operation efficiency and production efficiency. The slurry is continuously discharged, and the slurry is not interrupted during the discharging process, which greatly improves the equipment operation efficiency and production efficiency. The slurry is extracted in sections through the multiple arc-shaped mud suction pipes 6, which reduces the impact of the slurry on the equipment and speeds up the work efficiency.

[0042] As shown in Figure 2 , Figure 3 , Figure 7 and Figure 8 , specifically, the auxiliary slurry discharging assembly 8 includes a connecting pipe 83, one end of the connecting pipe 83 is connected with the slurry outlet pipe 5, and the slurry outlet pipe 5 is connected with a first auxiliary slurry discharging pipe 81 on both sides. Each first auxiliary slurry discharging pipe 81 is connected with a second auxiliary slurry discharging pipe 82 on one side. The inlet end of the first auxiliary slurry discharging pipe 81 is located on one side of the cutter head 2, and the inlet end of the second auxiliary slurry discharging pipe 82 is located in the slurry tank 4. Valve bodies are arranged on the first auxiliary slurry discharging pipe 81 and the second auxiliary slurry discharging pipe 82.

[0043] In the embodiment, when the spiral discharging mechanism 3 is blocked in the slurry tank 4 or the spiral discharging mechanism 3 does not need to operate, the valve body on the first auxiliary slurry discharging pipe 81 is closed, and the valve body on the second auxiliary slurry discharging pipe 82 is opened, so that the slurry in the slurry tank 4 can be directly discharged through the connecting pipe 83 by the slurry pump 7. When the cutter head 2 works in the sticky stratum prone to forming mud cakes, the valve body on the first auxiliary slurry discharging pipe 81 is opened, and the valve body on the second auxiliary slurry discharging pipe 82 is closed, so that the slurry near the cutter head 2 can be directly discharged through the connecting pipe 83 by the slurry pump 7. The appropriate slurry discharging mode can be selected according to the actual situation, the normal discharge of the cuttings in the multi-channel slurry discharging system can be ensured, the construction efficiency is high, and the use conditions of the multi-channel slurry discharging system are increased, and the slurry discharging demand of the shield machine under complex and variable working conditions is met.

[0044] As shown in Figure 2 and Figure 5As shown, specifically, the recycling mechanism 10 includes a water collecting tank 101 located below the conveying belt 9, the water collecting tank 101 is connected with an overflow tank 102 through an overflow pipe 108, the overflow tank 102 is provided with a control tank 103 on one side, the overflow tank 102 is internally provided with a water pump 104 and a liquid level meter 105, the water pump 104 is connected with the slurry tank 4 through a water pipe 106, the control tank 103 is provided with a water pumping tank 107 on one side, the water pumping tank 107 is used for pumping water into the overflow tank 102.

[0045] In the embodiment, the cutter head 2 rotates to cut the soil layer in the tunnel, the cuttings fall into the slurry tank 4, the water pump 104 is used to pass the dilute slurry in the overflow tank 102 into the slurry tank 4 through the water pipe 106, the cuttings and the dilute slurry are mixed, which can effectively improve the cuttings carrying capacity of the screw conveyor, the screw discharging mechanism 3 works, the cuttings are conveyed to the tail end through the front end of the screw conveyor, and then fall into the conveying belt 9 through the discharge gate, the broken stone and sludge are conveyed to the outside of the tunnel through the conveying belt 9, and the remaining slurry falls into the water collecting tank 101 below for recycling, when the water level of the water collecting tank 101 reaches a certain height, the water flows into the overflow tank 102 through the overflow pipe 108 for recycling, the liquid level in the overflow tank 102 can be monitored in real time through the liquid level meter 105, when the liquid level in the overflow tank 102 is lower than the preset value, the control tank 103 will work, the control tank 103 will control the external water pumping tank 107 to work, and the water pumping tank 107 is used to supplement water in the overflow tank 102, so that the recycling capacity is enhanced and the resources are saved.

[0046] As shown in Figure 2 and Figure 6 , specifically, the screw discharging mechanism 3 is provided with a discharge port 33 at one end, and the discharge port 33 is provided with an adjusting plate 34 on one side; the size of the discharge port 33 can be flexibly adjusted according to the need of the cuttings discharge amount and the solid compression degree in the cylinder of the screw discharging mechanism 3 through the adjusting plate 34 arranged at the discharge port 33.

[0047] As shown in Figure 2 and Figure 4 , specifically, each mud pumping pipe 6 is provided with a one-way valve 12, and a pressure sensor 13 is arranged between adjacent mud pumping pipes 6, one end of the pressure sensor 13 is connected with the screw discharging mechanism 3, the mud pumping pipe 6 is an arc-shaped high-pressure hose, and both ends of the mud pumping pipe 6 are connected with the screw discharging mechanism 3 and the slurry outlet pipe 5 respectively through quick couplings 14;

[0048] In the embodiment, the mud in different areas can be extracted through the plurality of mud extraction pipes 6, and the extraction efficiency can be accelerated. The outer connecting pipe 4 is in an arc shape, which can reduce the impact of the mud on the equipment. The inner cavities of the plurality of mud extraction pipes 6 are not communicated with each other, and the mud is output only from the inner cavity of the slurry outlet pipe 5 after being collected by the mud extraction pipes 6. The structure of the outer connecting pipe is convenient for maintenance and replacement, and the pump valve assembly does not need to be removed, which greatly reduces the labor intensity during maintenance. The pressure chamber 11 is communicated with the slurry outlet pipe 5, and the pressure chamber 11 is filled with high-pressure air. Through the design of the pressure chamber 11, the pressure fluctuation of the discharged liquid can be reduced.

[0049] Specifically, the spiral discharging mechanism 3 and the outlet of the slurry outlet pipe 5 have a tapered inner cavity transition to the quick connector 14, and the diameter of the tapered inner cavity gradually increases until it matches the diameter of the quick connector 14. Through this structure, the flow rate of the discharged mud is reduced. The pressure sensor 13 is used to detect the mud pressure in the spiral discharging mechanism 3. According to the mud pressure, the flow of the slurry pump 7 on the slurry outlet pipe 5 and the slurry pipe is adjusted. If the mud pressure is high, it indicates that the solid content of the mud is high, and the flow of the slurry pump 7 can be adjusted to be small. Conversely, the flow of the slurry pump 7 is adjusted to be large.

[0050] Embodiment Two

[0051] As shown in Figure 3 , Figure 7 and Figure 8 , on the basis of embodiment one, the application provides a technical solution: two first auxiliary slurry discharge pipes 81 and two second auxiliary slurry discharge pipes 82 are provided, and the two first auxiliary slurry discharge pipes 81 are symmetrically distributed on both sides of the connecting pipe 83.

[0052] In the embodiment, the first auxiliary slurry discharge pipe 81 and the second auxiliary slurry discharge pipe 82 are symmetrically distributed on both sides of the connecting pipe 83. Through the symmetric distribution of the first auxiliary slurry discharge pipe 81 and the second auxiliary slurry discharge pipe 82 on both sides of the connecting pipe 83, the slurry discharge system in the prior art can be applied not only to normal tunneling conditions but also to slurry discharge when sludge accumulates at the bottom of the slurry chamber 4. In addition, the influence of different turning directions of the cutter head 2 of the shield machine on the slurry discharge of the slurry chamber can be solved by setting the first auxiliary slurry discharge pipe 81 and the second auxiliary slurry discharge pipe 82 on both sides of the slurry door. When the cutter head 2 rotates clockwise, the sludge brought to the left side of the slurry chamber 4 by the cutter head 2 can be discharged along the left second auxiliary slurry discharge pipe 82 with the mud. When the cutter head 2 rotates counterclockwise, the sludge brought to the right side of the slurry chamber 4 by the cutter head 2 can be discharged along the right second auxiliary slurry discharge pipe 82 with the mud.

[0053] As shown in Figures 1-8As shown, on the basis of embodiment one, the application provides a technical solution: a tunnel boring machine slurry discharge pump mechanism slurry discharge method, specifically comprising the following steps: S1, the cutterhead 2 rotates to cut the soil layer in the tunnel, and the cut-off spoil enters the slurry tank 4; S2, the water pump 104 draws the dilute slurry in the overflow tank 102 into the slurry tank 4, so that the spoil and the dilute slurry are mixed; S3, the spiral discharge mechanism 3 transports the spoil in the slurry tank 4 to the end through the front end of the screw conveyor, and falls into the conveyor belt 9 through the discharge port 33 and is transported to the outside of the tunnel; S4, the remaining slurry on the conveyor belt 9 falls into the recycling mechanism 10 below for recycling. In step S3, while the spiral discharge mechanism 3 transports the slurry carrying a large amount of solid particles, the multiple mud suction pipes 6 can suck out the slurry in the transportation process of the spiral discharge mechanism 3.

[0054] In this embodiment, by adopting multiple mud suction pipes 6 to suck out the slurry in the transportation process of the spiral discharge mechanism 3, the content of the slurry in the screw conveyor can be effectively reduced, thereby reducing the running power of the screw conveyor for transporting a large amount of slurry with solid particles, and reducing the loss and running cost of the equipment. The spoil deposited in the screw conveyor is transported by the screw conveyor and discharged from the discharge port 33, and the spoil can be continuously discharged without interrupting the tunneling, which greatly improves the equipment running efficiency and production efficiency. When the spiral discharge mechanism 3 in the slurry tank 4 is blocked or the spiral discharge mechanism 3 does not need to run, by closing the valve body on the first auxiliary slurry discharge pipe 81 and opening the valve body on the second auxiliary slurry discharge pipe 82, the slurry in the slurry tank 4 can be directly discharged through the connecting pipe 83 by the slurry discharge pump 7; when the cutterhead 2 works in a sticky stratum prone to mud cake formation, by opening the valve body on the first auxiliary slurry discharge pipe 81 and closing the valve body on the second auxiliary slurry discharge pipe 82, the slurry near the cutterhead 2 can be directly discharged by the slurry discharge pump 7 through the connecting pipe 83. The appropriate slurry discharge mode can be selected according to the actual situation, which can ensure the normal discharge of the spoil in the multi-channel slurry discharge system, improve the construction efficiency, and increase the use conditions of the multi-channel slurry discharge system, and meet the slurry discharge requirements of the shield machine under complex and variable working conditions.

[0055] Working principle: The cutter head 2 rotates to cut the soil layer in the tunnel, and the cuttings fall into the slurry tank 4. The water pump 104 pumps the thin slurry in the overflow tank 102 into the slurry tank 4, so that the cuttings and the thin slurry are mixed. The spiral discharging mechanism 3 discharges the cuttings in the slurry tank 4 through the front end of the spiral conveyor to the tail end, and then falls into the conveying belt 9 from the discharge port 33, and is conveyed to the outside of the tunnel. The remaining slurry on the conveying belt 9 falls into the recycling mechanism 10 below for recycling. In the spiral cylinder, the slurry and solid cuttings gradually separate along the axial direction of the spiral, and the solid cuttings are deposited in the separation area 32 between adjacent pushing pieces 31. The slurry and solid cuttings are separated well. The multiple mud suction pipes 6 can be used to suck the slurry in the spiral discharging mechanism 3 during transportation, which can effectively reduce the slurry content in the spiral, thereby reducing the operating power of the spiral conveying a large amount of slurry containing solid particles, and reducing the equipment loss and operating cost.

[0056] It should be noted that the relative terms such as first and second, and the like are used herein only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not expressly listed, or inherent to such process, method, article, or apparatus.

[0057] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A slurry pump mechanism for a tunnel boring machine, comprising a cutterhead (2), characterized in that: The cutterhead (2) is connected to the shield machine body (1), and further comprises: A spiral discharge mechanism (3), the spiral discharge mechanism (3) being connected inside the shield machine body (1); A mud and water bin (4), wherein the feeding end of the spiral discharge mechanism (3) is located in the mud and water bin (4) and is used to discharge the slag in the mud and water bin (4), and the discharging end of the spiral discharge mechanism (3) is located on the conveyor belt (9); A slurry discharge pipe (5), wherein a plurality of mud extraction pipes (6) are connected to the slurry discharge pipe (5); A slurry discharge pump (7), the slurry discharge pump (7) being arranged on the mud pumping pipe (6); An auxiliary slurry discharge component (8), one end of the auxiliary slurry discharge component (8) is connected to the slurry discharge pipe (5), and the auxiliary slurry discharge component (8) is used to directly extract mud and water from the mud and water bin (4); A recovery mechanism (10), the recovery mechanism (10) being connected below the conveyor belt (9); One end of the mud extraction pipe (6) is connected to the spiral discharge mechanism (3), and a plurality of the mud extraction pipes (6) are used to extract mud and water from the spiral discharge mechanism (3); The auxiliary slurry discharge assembly (8) comprises a connecting pipe (83), one end of which is connected to the slurry discharge pipe (5), both sides of the slurry discharge pipe (5) are connected to first auxiliary slurry discharge pipes (81), one side of each of the first auxiliary slurry discharge pipes (81) is connected to a second auxiliary slurry discharge pipe (82), the inlet end of the first auxiliary slurry discharge pipe (81) is located on one side of the cutterhead (2), and the inlet end of the second auxiliary slurry discharge pipe (82) is located in the mud and water bin (4), and valve bodies are provided on both the first auxiliary slurry discharge pipe (81) and the second auxiliary slurry discharge pipe (82).

2. The slurry pump mechanism for a tunnel boring machine according to claim 1, characterized in that: The recovery mechanism (10) includes a water collecting tank (101), the water collecting tank (101) is located below the conveyor belt (9), the water collecting tank (101) is connected to an overflow box (102) via an overflow pipe (108), a control box (103) is provided on one side of the overflow box (102), a water pump (104) and a liquid level gauge (105) are provided inside the overflow box (102), and the water pump (104) is connected to the mud and water tank (4) via a water pipe (106).

3. The slurry pump mechanism for a tunnel boring machine according to claim 2, characterized in that: A water pumping box (107) is provided on one side of the control box (103), and the water pumping box (107) is used to pump water into the overflow box (102).

4. The slurry pump mechanism for a tunnel boring machine according to claim 1, characterized in that: A discharge port (33) is provided at one end of the spiral discharge mechanism (3), and an adjustment plate (34) is provided on one side of the discharge port (33).

5. The slurry pump mechanism for a tunnel boring machine according to claim 1, characterized in that: A plurality of push pieces (31) are provided on the spiral shaft of the spiral discharge mechanism (3), and a separation area (32) is formed between adjacent push pieces (31). The separation area (32) is used to reduce the pressure of the mud pushed by the push pieces (31).

6. The slurry pump mechanism for a tunnel boring machine according to claim 1, characterized in that: There are two of each of the first auxiliary pulp discharge pipe (81) and the second auxiliary pulp discharge pipe (82), and the two first auxiliary pulp discharge pipes (81) are symmetrically distributed on both sides of the connecting pipe (83).

7. The slurry pump mechanism for a tunnel boring machine according to claim 1, characterized in that: The outlet end of the slurry discharge pipe (5) is provided with a pressure regulating chamber (11), and the pressure regulating chamber (11) is used to reduce the pressure fluctuation of the discharge liquid. Each of the mud pumping pipes (6) is provided with a one-way valve (12), and a pressure sensor (13) is provided between adjacent mud pumping pipes (6). One end of the pressure sensor (13) is connected to the spiral discharge mechanism (3). The mud pumping pipe (6) adopts an arc-shaped high-pressure hose. Both ends of the mud pumping pipe (6) are respectively connected to the spiral discharge mechanism (3) and the slurry discharge pipe (5) through a quick connector (14).

8. A slurry discharge method for a tunnel boring machine using a slurry discharge pump, characterized in that: The method is applicable to the slurry pump mechanism for a tunnel boring machine according to any one of claims 1 to 7, and specifically comprises the following steps: S1, the cutterhead (2) rotates to cut the soil layer in the tunnel, and the removed soil enters the mud and water tank (4); S2, the water pump (104) pumps the slurry inside the overflow box (102) into the mud and water bin (4), so that the slag and the slurry are mixed; S3, the spiral discharge mechanism (3) transports the slag from the mud and water bin (4) to the end through the front end of the screw conveyor, and the slag falls from the discharge port (33) onto the conveyor belt (9) and is transported outside the tunnel; S4, the remaining slurry on the conveyor belt (9) falls into the recovery mechanism (10) below for recycling.

9. The slurry discharge method for a tunnel boring machine using a slurry discharge pump according to claim 8, characterized in that: In step S3, while the spiral discharge mechanism (3) transports the mud carrying a large amount of solid particles, a plurality of mud extraction pipes (6) can extract the mud in the process of being transported in the spiral discharge mechanism (3).

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