CN117927265A - Pulp discharging pump mechanism and pulp discharging method for tunnel boring machine - Google Patents

Abstract

The invention discloses a slurry discharging pump mechanism and a slurry discharging method for a tunnel boring machine, comprising a cutter head, wherein the cutter head is connected to a shield tunneling machine main body; the spiral discharging mechanism is connected inside the shield tunneling machine main body, and the feeding end of the spiral discharging mechanism is positioned in the mud sump. Through there is the velocity difference between mud and the solid slag charge, in the screw barrel, mud and solid slag charge can gradually take place to segregate along screw axis, the solid slag charge deposits in the interval district that forms between adjacent propelling movement piece and piles up, mud and solid slag charge separation effect is good, can take out the mud in the transportation in the screw discharging mechanism through a plurality of mud pipes that set up, can effectively reduce the mud content in the screw machine, thereby the running power of the mud of screw machine transport a large amount of solid particles has been reduced, loss and running cost of equipment have been reduced.

Description

Pulp discharging pump mechanism and pulp discharging method for tunnel boring machine

Technical Field

The invention relates to the technical field of tunnel boring machines, in particular to a slurry discharging pump mechanism and a slurry discharging method for a tunnel boring machine.

Background

The tunnel boring machine is special equipment for excavating an underground tunnel, can rapidly and efficiently excavate and remove earthwork, is called a shield machine for short, and is divided into a soil pressure balance shield machine and a slurry balance shield machine. The working principle of the earth pressure balance type shield machine is that a cutter head cuts earth layers, the cut earth enters an earth cabin, the earth in the earth cabin and the pressure of an excavation surface are balanced, meanwhile, slag is discharged by a screw conveyor in the earth cabin, and a soil discharging device at a soil discharging port continuously discharges the earth under the state that the soil discharge amount and the pushing amount are balanced; the working principle of the slurry balance type shield tunneling machine is that a sealed slurry bin is formed between a cutter head and a rear partition plate, slurry with proper pressure is injected into the slurry bin to form a slurry film on an excavation surface, a soil body on the front surface is supported, the stability of the excavation surface is realized, the cutter head cuts the soil body, and high-density slurry is formed after mixing the residue soil and the slurry and is conveyed to the ground for treatment by a mud pump and a pipeline.

The existing tunneling modes of the tunnel boring machine are mainly one of earth pressure balanced type and slurry balanced type, because the geological change of the tunnel traversing area is large at the present stage, the tunneling difficulty of the shield machine of a single tunneling mode easily occurs in the working process of a large number of complicated sections, the deslagging and slurry discharging effects are often poor due to the geological change, the construction period is influenced, and although some shields which can combine the earth pressure balanced tunneling mode and the slurry balanced tunneling mode exist, the deslagging mode is only simple combination, and the energy consumption is high.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a slurry discharging pump mechanism and a slurry discharging method for a tunnel boring machine, wherein the slurry discharging pump mechanism comprises a cutter head, and the cutter head is connected to a shield tunneling machine main body and further comprises:

the spiral discharging mechanism is connected inside the shield tunneling machine main body, the feeding end of the spiral discharging mechanism is positioned in the mud water bin and used for discharging dregs in the mud water bin, the discharging end of the spiral discharging mechanism is positioned on the conveying belt, and the recovery mechanism is arranged below the conveying belt;

The slurry discharging pipeline is connected with a plurality of slurry discharging pipes, a slurry discharging pump is arranged on the slurry discharging pipes, one end of each slurry discharging pipe is connected with the spiral discharging mechanism, the slurry discharging pipes are used for discharging muddy water in the spiral discharging mechanism, a pressure regulating chamber is arranged at the outlet end of each slurry discharging pipeline, and the pressure regulating chamber is used for reducing pressure fluctuation of liquid discharging;

The auxiliary slurry discharging assembly is connected with the slurry discharging pipeline at one end and is used for directly pumping out muddy water from the muddy water bin;

The spiral shaft of the spiral discharging mechanism is provided with a plurality of sections of pushing sheets, a separation area is formed between every two adjacent pushing sheets, and the separation area is used for decompressing mud pushed by the pushing sheets.

As a further description of the above technical solution: the auxiliary pulp discharging assembly comprises a connecting pipe, one end of the connecting pipe is connected with a pulp discharging pipeline, two sides of the pulp discharging pipeline are respectively connected with a first auxiliary pulp discharging pipe, one side of each first auxiliary pulp discharging pipe is respectively connected with a second auxiliary pulp discharging pipe, the inlet end of each first auxiliary pulp discharging pipe is positioned on one side of a cutter head, the inlet end of each second auxiliary pulp discharging pipe is positioned in a mud water bin, and valve bodies are respectively arranged on the first auxiliary pulp discharging pipes and the second auxiliary pulp discharging pipes.

As a further description of the above technical solution: the recovery mechanism comprises a water collecting tank, the water collecting tank is located below the conveying belt and connected with an overflow tank through an overflow pipe, a control box is arranged on one side of the overflow tank, a water pump and a liquid level meter are arranged inside the overflow tank, and the water pump is connected with a muddy water bin through a water pipe.

As a further description of the above technical solution: one side of the control box is provided with a water pumping tank which is used for pumping water into the overflow box.

As a further description of the above technical solution: one end of the spiral discharging mechanism is provided with a discharging hole, and one side of the discharging hole is provided with an adjusting plate.

As a further description of the above technical solution: each mud pumping pipe is provided with a one-way valve, a pressure sensor is arranged between every two adjacent mud pumping pipes, and one end of the pressure sensor is connected with a spiral discharge mechanism.

As a further description of the above technical solution: the first auxiliary slurry discharging pipes and the second auxiliary slurry discharging pipes are respectively provided with two first auxiliary slurry discharging pipes and two second auxiliary slurry discharging pipes which are symmetrically distributed on two sides of the connecting pipe.

As a further description of the above technical solution: the mud pumping pipe adopts an arc-shaped high-pressure hose, and two ends of the mud pumping pipe are respectively connected with the spiral discharging mechanism and the slurry outlet pipeline through quick connectors.

The invention further aims to provide a slurry discharging method for a tunnel boring machine, which comprises the following steps of:

s1, a cutter head rotates to cut soil layers in a tunnel, and the cut residue enters a mud water bin;

s2, pumping the slurry in the overflow box into a slurry sump by a water pump so as to mix the dregs and the slurry;

s3, conveying the muddy water bin muck to the tail end through the front end of the spiral conveyor by the spiral discharging mechanism, and conveying the muddy water bin muck out of the tunnel by falling onto the conveying belt from the discharging hole;

S4, the residual slurry on the conveyor belt falls into a recovery mechanism below for recovery and utilization.

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 slurry in the transporting process in the spiral discharging mechanism can be pumped out by a plurality of slurry pumping pipes.

The technical scheme has the following advantages or beneficial effects:

1. according to the invention, the mud in the transportation process in the spiral discharging mechanism can be pumped out through the plurality of mud pumping pipes, so that the mud content in the spiral machine can be effectively reduced, the operation power of the spiral machine for conveying a large amount of mud with solid particles is reduced, and the loss and the operation cost of equipment are reduced.

2. According to the invention, the slurry in the overflow box is introduced into the slurry bin through the water pipe by utilizing the water pump, and the slag soil and the slurry are mixed, so that the slag carrying capacity of the screw conveyor can be effectively improved, and the residual slurry on the conveyor belt falls into the water collection tank below for recycling, thereby enhancing the recycling capacity and saving resources.

3. The invention can extract the mud in different areas through the plurality of mud extraction pipes, can accelerate extraction efficiency, can reduce the impact of the mud on equipment by adopting the shape that the outer connecting pipe is approximate to an arc shape, the inner cavities of the plurality of mud extraction pipes are not communicated with each other, the mud extraction pipes collect the slurry and then output the slurry only from the inner cavity of the slurry outlet pipe, and the structure of the outer connecting pipe is adopted, so that the maintenance and the replacement are very convenient.

Drawings

FIG. 1 is a schematic diagram of a slurry pump mechanism according to an embodiment of the present invention;

FIG. 2 is a side view of a pulp pump mechanism in an embodiment of the invention;

FIG. 3 is a top view of a slurry pump mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic view of the construction of the mud pump mechanism of FIG. 2;

FIG. 5 is a schematic view of the recovery mechanism of the slurry pump mechanism of FIG. 2;

FIG. 6 is a schematic view of the screw discharge mechanism of the discharge pump mechanism of FIG. 2;

FIG. 7 is a schematic view of an auxiliary discharge assembly of the discharge pump mechanism of FIG. 2;

FIG. 8 is a schematic view of an auxiliary discharge assembly of another embodiment of the discharge pump mechanism of FIG. 2.

Legend description:

1. A shield machine main body; 2. a cutterhead; 3. a spiral discharging mechanism; 4. a mud water bin; 5. a slurry outlet pipeline; 6. a mud pumping pipe; 7. a slurry pump; 8. an auxiliary pulp discharging assembly; 9. a conveyor belt; 10. a recovery mechanism; 11. a pressure regulating chamber; 12. a one-way valve; 13. a pressure sensor; 14. a quick connector; 31. pushing the sheet; 32. a separation region; 33. a discharge port; 34. an adjusting plate; 81. a first auxiliary discharge pipe; 82. a second auxiliary slurry discharge pipe; 83. a connecting pipe; 101. a water collection tank; 102. an overflow box; 103. a control box; 104. a water pump; 105. a liquid level gauge; 106. a water pipe; 107. a pumping tank; 108. and (3) an overflow pipe.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiment one:

As shown in fig. 1 to 8, the slurry pump mechanism for a tunnel boring machine of the present invention includes a cutter head 2, the cutter head 2 being connected to a shield machine main body 1, and further includes: the spiral discharging mechanism 3 is connected inside the shield tunneling machine main body 1, the feeding end of the spiral discharging mechanism 3 is positioned in the mud water bin 4 and used for discharging dregs in the mud water bin 4, the discharging end of the spiral discharging mechanism 3 is positioned on the conveying belt 9, and the recovery mechanism 10 is arranged below the conveying belt 9; the slurry discharging device comprises a slurry discharging pipeline 5, wherein a plurality of slurry discharging pipes 6 are connected to the slurry discharging pipeline 5, a slurry discharging pump 7 is arranged on the slurry discharging pipe 6, one end of each slurry discharging pipe 6 is connected with a spiral discharging mechanism 3, the slurry discharging pipes 6 are used for discharging slurry in the spiral discharging mechanism 3, a pressure regulating chamber 11 is arranged at the outlet end of the slurry discharging pipeline 5, and the pressure regulating chamber 11 is used for reducing pressure fluctuation of liquid discharge; the auxiliary slurry discharging assembly 8, one end of the auxiliary slurry discharging assembly 8 is connected with the slurry discharging pipeline 5, and the auxiliary slurry discharging assembly 8 is used for directly pumping out muddy water from the muddy water bin 4; the spiral shaft of the spiral discharging mechanism 3 is provided with a plurality of sections of pushing sheets 31, a separation area 32 is formed between adjacent pushing sheets 31, and the separation area 32 is used for decompressing the slurry pushed by the pushing sheets 31.

In this embodiment, the cutterhead 2 rotates to cut the soil layer in the tunnel, the cut dregs enter the mud sump 4, the mud carrying a large amount of solid particles in the soil sump enters the spiral discharge mechanism 3 from the inlet of the spiral machine, the fluidity of the mud in the spiral machine is good, and therefore the mud is easier to convey than solid, especially large-particle massive solids, because of the speed difference between the mud and the solid dregs in the spiral machine, the mud and the solid dregs can be gradually isolated along the axial direction of the spiral machine in the spiral machine body, the solid dregs are deposited and accumulated in the separation area 32 formed between the adjacent pushing sheets 31, the separation effect of the mud and the solid dregs is good, the mud in the transportation process of the spiral discharge mechanism 3 can be extracted through the plurality of mud extracting pipes 6, the mud content in the spiral machine can be effectively reduced, the running power of the mud conveying a large amount of solid particles of the spiral machine is reduced, the loss and running cost of equipment are reduced, the dregs deposited in the spiral machine are conveyed by the spiral machine and discharged from the discharge port 33, the dregs can be continuously discharged, the slag is not required to be separated in the axial direction of the spiral machine, the process is greatly improved, the production efficiency is improved, the mud is improved by the operation efficiency is improved, and the arc-shaped mud is improved, and the working efficiency is improved by the mud is improved.

As shown in fig. 2,3, 7 and 8, specifically, the auxiliary pulp discharging assembly 8 includes a connecting pipe 83, one end of the connecting pipe 83 is connected with the pulp discharging pipe 5, two sides of the pulp discharging pipe 5 are connected with first auxiliary pulp discharging pipes 81, one side of each first auxiliary pulp discharging pipe 81 is connected with a second auxiliary pulp discharging pipe 82, an inlet end of each first auxiliary pulp discharging pipe 81 is located at one side of the cutterhead 2, an inlet end of each second auxiliary pulp discharging pipe 82 is located in the mud sump 4, and valve bodies are arranged on the first auxiliary pulp discharging pipes 81 and the second auxiliary pulp discharging pipes 82.

In this embodiment, when the spiral discharging mechanism 3 in the mud water bin 4 is blocked or the spiral discharging mechanism 3 does not need to operate, the valve body on the second auxiliary slurry discharging pipe 82 is opened by closing the valve body on the first auxiliary slurry discharging pipe 81, so that the mud water in the mud water bin 4 can be directly discharged through the connecting pipe 83 by the slurry discharging pump 7; when the cutterhead 2 works in a viscous stratum of a mud cake, 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 slurry near the cutterhead 2 can be directly discharged through the slurry discharging pump 7 through the connecting pipe 83, a proper slurry discharging mode can be selected according to actual conditions, normal discharge of dregs in a multi-channel slurry discharging system can be ensured, the construction efficiency is high, the use condition of the multi-channel slurry discharging system is further increased, and the slurry discharging requirement of a shield machine under complex and variable working conditions is met.

As shown in fig. 2 and 5, specifically, the recovery mechanism 10 includes a water collection tank 101, the water collection tank 101 is located below the conveyor belt 9, the water collection tank 101 is connected with an overflow tank 102 through an overflow pipe 108, a control tank 103 is provided on one side of the overflow tank 102, a water pump 104 and a level gauge 105 are provided inside the overflow tank 102, the water pump 104 is connected with the muddy water bin 4 through a water pipe 106, a water suction tank 107 is provided on one side of the control tank 103, and the water suction tank 107 is used for sucking water into the overflow tank 102.

In this embodiment, the cutterhead 2 rotates to cut soil layer in the tunnel, the cut dregs enter the mud sump 4, the water pump 104 is utilized to introduce the thin slurry in the overflow tank 102 into the mud sump 4 through the water pipe 106, the dregs and the thin slurry are mixed, the dreg carrying capacity of the screw conveyor can be effectively improved, the screw discharging mechanism 3 works, the dregs are conveyed to the tail end through the front end of the screw conveyor, the dregs fall into the conveying belt 9 from the dreg outlet door, the crushed stones and the sludge are conveyed out of the tunnel through the conveying belt 9, the residual mud 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 for recycling through the overflow pipe 108, 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 a preset value, the control tank 103 can control the work of the external water pumping tank 107, the water supplementing the inside the overflow tank 102 is avoided, the water consumption of the overflow tank 102 is enhanced, the water consumption is avoided, the recycling capacity is saved, and the water consumption is reduced.

As shown in fig. 2 and 6, specifically, one end of the spiral discharging mechanism 3 is provided with a discharging hole 33, and one side of the discharging hole 33 is provided with an adjusting plate 34; through the regulating plate 34 that discharge gate 33 department was equipped with, can be according to the needs of the inside solid degree of compressing tightly of the spiral discharge mechanism 3 barrel of slag discharge volume, the size of discharge gate 33 can be adjusted in a flexible way.

As shown in fig. 2 and fig. 4, specifically, each mud pumping pipe 6 is provided with a one-way valve 12, a pressure sensor 13 is arranged between adjacent mud pumping pipes 6, one end of the pressure sensor 13 is connected with the spiral discharge mechanism 3, the mud pumping pipes 6 adopt arc-shaped high-pressure hoses, and two ends of the mud pumping pipes 6 are respectively connected with the spiral discharge mechanism 3 and the slurry outlet pipeline 5 through quick connectors 14;

In this embodiment, can take out the mud in different regions through a plurality of mud pipes 6 that adopt to can accelerate extraction efficiency, be the arc through the outer connecting pipe 4 that adopts, can reduce the impact of mud to equipment, the inner chamber of a plurality of mud pipes 6 is not UNICOM each other, the mud pipe 6 just exports from the inner chamber of play thick liquid pipeline 5 after gathering thick liquid, adopt the structure of outer takeover, it is very convenient to maintain and change, need not to demolish the pump valve subassembly again, intensity of labour when having reduced the maintenance by a wide margin, pressure regulating chamber 11 and play thick liquid pipeline 5 intercommunication, the intussuseption of pressure regulating chamber 11 through setting has high-pressure air, through the design of pressure regulating chamber 11, can reduce the pressure fluctuation of flowing back.

Specifically, a conical inner cavity transition is arranged between the outlets of the spiral discharging mechanism 3 and the slurry outlet pipeline 5 and the quick connector 14, and the diameter of the conical inner cavity is changed from small to large until the diameter of the conical inner cavity is matched with the diameter of the quick connector 14, so that the structure reduces the flow rate of discharged slurry; the pressure sensor 13 is used for detecting the slurry pressure in the spiral discharging mechanism 3, and adjusting the flow of the slurry discharging pump 7 on the slurry discharging pipeline 5 and the slurry pipeline according to the slurry pressure, so that the slurry pressure is larger, the slurry solid content is larger, the flow of the slurry discharging pump 7 can be adjusted to be smaller, and otherwise, the flow of the slurry discharging pump 7 is increased.

Example two

As shown in fig. 3, 7 and 8, on the basis of the first embodiment, the present invention provides a technical solution: the first auxiliary pulp discharging pipes 81 and the second auxiliary pulp discharging pipes 82 are respectively provided with two first auxiliary pulp discharging pipes 81 which are symmetrically distributed on two sides of the connecting pipe 83.

In the present embodiment, the first auxiliary pulp discharging pipe 81 and the second auxiliary pulp discharging pipe 82 are symmetrically arranged on the left and right sides of the two sides of the connecting pipe 83; by adopting the first auxiliary slurry discharging pipe 81 and the second auxiliary slurry discharging pipe 82 which are symmetrically distributed at the left side and the right side of the two sides of the connecting pipe 83, the slurry discharging device not only can be suitable for slurry discharging when a slurry discharging system in the prior art normally drives and slag accumulation at the bottom of the slurry cabin 4 causes stagnation and discharge, but also can solve the influence of different steering of the shield machine cutter head 2 on slurry discharging of the slurry cabin by arranging at the left side and the right side of a slurry door, namely when the cutter head 2 rotates clockwise, slag and soil brought to the left side of the slurry cabin 4 by the cutter head 2 can be discharged along the second auxiliary slurry discharging pipe 82 at the left side along with slurry; when the cutterhead 2 rotates anticlockwise, the clinker brought to the right side of the mud sump 4 by the cutterhead 2 can be discharged along the second auxiliary discharge pipe 82 on the right side with the mud.

As shown in fig. 1 to 8, on the basis of the first embodiment, the present invention provides a technical solution: the slurry discharging method of the slurry discharging pump mechanism of the tunnel boring machine specifically comprises the following steps: s1, a cutter head 2 rotates to cut soil layers in a tunnel, and the cut residue enters a mud water bin 4; s2, pumping the slurry in the overflow box 102 into the muddy water bin 4 by the water pump 104 so as to mix the dregs and the slurry; s3, conveying the dregs of the mud water bin 4 to the tail end through the front end of the spiral conveyor by the spiral discharge mechanism 3, and conveying the dregs out of the tunnel by falling onto the conveying belt 9 from the discharge hole 33; s4, the residual slurry on the conveying belt 9 falls into a lower recovery mechanism 10 for recovery and utilization. In step S3, the screw discharging mechanism 3 transports the slurry carrying a large amount of solid particles, and the plurality of slurry drawing pipes 6 draw out the slurry during transportation in the screw discharging mechanism 3.

In the embodiment, the slurry in the transportation process in the spiral discharging mechanism 3 can be pumped out by adopting a plurality of slurry pumping pipes 6, so that the slurry content in the spiral machine can be effectively reduced, the operation power of the spiral machine for conveying a large amount of slurry of solid particles is reduced, the loss and the operation cost of equipment are reduced, the slag precipitated in the spiral machine is conveyed by the spiral machine and discharged from the discharge hole 33, and the slag can be continuously discharged, the tunneling is not required to be interrupted in the deslagging process, the operation efficiency of the equipment is greatly improved, the production efficiency is high, when the spiral discharging mechanism 3 in the muddy water bin 4 is blocked or the spiral discharging mechanism 3 does not need to operate, the valve body on the first auxiliary discharging pipe 81 is closed, and the valve body on the second auxiliary discharging pipe 82 is opened, so that the muddy water in the muddy water bin 4 can be directly discharged through the connecting pipe 83 by the slurry discharging pump 7; when the cutterhead 2 works in a viscous stratum of a mud cake, 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 slurry near the cutterhead 2 can be directly discharged through the slurry discharging pump 7 through the connecting pipe 83, a proper slurry discharging mode can be selected according to actual conditions, normal discharge of dregs in a multi-channel slurry discharging system can be ensured, the construction efficiency is high, the use condition of the multi-channel slurry discharging system is further increased, and the slurry discharging requirement of a shield machine under complex and variable working conditions is met.

Working principle: the cutter head 2 rotates to cut soil layers in the tunnel, the cut dregs enter the mud sump 4, the water pump 104 pumps the thin slurry in the overflow box 102 into the mud sump 4, so that the dregs and the thin slurry are mixed, the spiral discharging mechanism 3 conveys the dregs in the mud sump 4 to the tail end through the front end of the spiral conveyor, the dregs fall into the conveying belt 9 from the discharge hole 33 to the outside of the tunnel, the residual mud on the conveying belt 9 falls into the recovery mechanism 10 below for recycling, in the spiral machine body, the mud and the solid slag are gradually separated along the axial direction of the spiral machine, the solid slag is deposited and accumulated in a separation area 32 formed between adjacent pushing sheets 31, the mud and the solid slag are separated, the mud in the transportation process in the spiral discharging mechanism 3 can be pumped out through the plurality of mud pumping pipes 6, the content of the mud in the spiral machine can be effectively reduced, the running power of the mud for conveying a large amount of solid particles by the spiral machine is reduced, and the loss and the running cost of equipment are reduced.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (10)

1. The utility model provides a pulp discharging pump mechanism for tunnel boring machine, includes blade disc (2), its characterized in that, blade disc (2) are connected on shield machine main part (1), still include:

The spiral discharging mechanism (3) is connected inside the shield tunneling machine main body (1);

the feeding end of the spiral discharging mechanism (3) is positioned in the mud sump (4) and used for discharging dregs in the mud sump (4), and the discharging end of the spiral discharging mechanism (3) is positioned on the conveying belt (9);

the slurry outlet pipeline (5) is connected with a plurality of slurry pumping pipes (6);

a slurry discharge pump (7), wherein the slurry discharge pump (7) is arranged on the mud pumping pipe (6);

the auxiliary slurry discharging assembly (8), one end of the auxiliary slurry discharging assembly (8) is connected with the slurry outlet pipeline (5), and the auxiliary slurry discharging assembly (8) is used for directly extracting muddy water from the muddy water bin (4);

A recovery mechanism (10), wherein the recovery mechanism (10) is connected below the conveying belt (9);

One end of the mud pumping pipe (6) is connected with the spiral discharging mechanism (3), and a plurality of mud pumping pipes (6) are used for pumping out mud water in the spiral discharging mechanism (3).

2. The pulp discharge pump mechanism for a tunnel boring machine according to claim 1, wherein: auxiliary pulp discharging assembly (8) is including connecting pipe (83), connecting pipe (83) one end is connected with play thick liquid pipeline (5), play thick liquid pipeline (5) both sides all are connected with first auxiliary pulp discharging pipe (81), every first auxiliary pulp discharging pipe (81) one side all is connected with second auxiliary pulp discharging pipe (82), first auxiliary pulp discharging pipe (81) entrance point is located blade disc (2) one side, second auxiliary pulp discharging pipe (82) entrance point is located mud sump (4), all be provided with the valve body on first auxiliary pulp discharging pipe (81) and the second auxiliary pulp discharging pipe (82).

3. The pulp discharge pump mechanism for a tunnel boring machine according to claim 1, wherein: the recycling mechanism (10) comprises a water collecting tank (101), the water collecting tank (101) is located below the conveying belt (9), the water collecting tank (101) is connected with an overflow tank (102) through an overflow pipe (108), a control box (103) is arranged on one side of the overflow tank (102), a water pump (104) and a liquid level meter (105) are arranged inside the overflow tank (102), and the water pump (104) is connected with a muddy water bin (4) through a water pipe (106).

4. A pulp discharge pump mechanism for a tunnel boring machine according to claim 3, wherein: a pumping tank (107) is arranged on one side of the control box (103), and the pumping tank (107) is used for pumping water into the overflow box (102).

5. The pulp discharge pump mechanism for a tunnel boring machine according to claim 1, wherein: one end of the spiral discharging mechanism (3) is provided with a discharging hole (33), and one side of the discharging hole (33) is provided with an adjusting plate (34).

6. The pulp discharge pump mechanism for a tunnel boring machine according to claim 1, wherein: the spiral shaft of the spiral discharging mechanism (3) is provided with a plurality of sections of pushing sheets (31), a separation area (32) is formed between every two adjacent pushing sheets (31), and the separation area (32) is used for decompressing mud pushed by the pushing sheets (31).

7. The pulp discharge pump mechanism for a tunnel boring machine according to claim 2, wherein: the first auxiliary pulp discharging pipes (81) and the second auxiliary pulp discharging pipes (82) are respectively arranged at two sides of the connecting pipe (83), and the two first auxiliary pulp discharging pipes (81) are symmetrically distributed at two sides of the connecting pipe.

8. The pulp discharge pump mechanism for a tunnel boring machine according to claim 1, wherein: the utility model discloses a mud pump, including mud pipe (6), mud pipe (6) are provided with pressure regulating room (11) in the exit end, pressure regulating room (11) are used for reducing the pressure fluctuation of flowing back, every all be provided with check valve (12) on mud pipe (6), it is adjacent be provided with pressure sensor (13) between mud pipe (6), pressure sensor (13) one end is connected with spiral bin outlet mechanism (3), mud pipe (6) adopt arc high-pressure hose, mud pipe (6) both ends all are connected with spiral bin outlet mechanism (3) and mud pipe (5) respectively through quick-operation joint (14).

9. The slurry discharging method of the slurry discharging pump for the tunnel boring machine is characterized by comprising the following steps of: the method steps are applicable to the slurry discharging device as claimed in any one of claims 1 to 8, and specifically comprise the following steps:

S1, a cutter head (2) rotationally cuts a soil layer in a tunnel, and the cut dregs enter a mud water bin (4);

S2, pumping the slurry in the overflow box (102) into a mud water bin (4) by a water pump (104) so as to mix the dregs and the slurry;

S3, conveying the slag soil of the mud water bin (4) to the tail end through the front end of the spiral conveyor by the spiral discharge mechanism (3), and conveying the slag soil out of the tunnel by falling into the conveying belt (9) from the discharge hole (33);

S4, the residual slurry on the conveying belt (9) falls into a recovery mechanism (10) below for recovery and utilization.

10. The pulp discharging method of the pulp discharging pump for the tunnel boring machine according to claim 9, wherein: in step S3, the spiral discharging mechanism (3) conveys slurry carrying a large amount of solid particles, and a plurality of slurry pumping pipes (6) can pump the slurry in the conveying process in the spiral discharging mechanism (3).