Shield tunnel slurry circulation stone crushing device

Abstract

The invention relates to the technical field of shield construction, and particularly discloses a shield tunnel slurry circulation stone crushing device which comprises a soil collecting box, a stirring device is rotationally connected in the soil collecting box, guide plates are arranged on the two sides of the soil collecting box respectively, a flow limiting device is arranged on each guide plate, and the two flow limiting devices are located above the soil collecting box. And the speed of gravel entering the soil collecting box is reduced through the flow limiting device. According to the shield tunnel slurry circulation stone crushing device, in the falling process of broken stones and muck, the broken stones and the muck fall onto the flow limiting plate firstly, and the broken stones and the muck are shielded through the flow limiting teeth, so that the broken stones and the muck slowly fall into the muck collecting box. And meanwhile, the flow limiting plate can swing up and down in the front-back moving process, in this way, broken stones and muck can be prevented from being blocked at the flow limiting teeth, and meanwhile large broken stones can be crushed through the crushing blades in the front-back moving process of the flow limiting plate.

Description

Technical Field

[0001] The present invention relates to the technical field of shield construction, and particularly relates to a shield tunnel mud circulation gravel device. Background Art

[0002] The shield tunnel mud circulation system is a key component in slurry shield construction, mainly used for stabilizing the excavation face, cooling the cutter, transporting soil and sand, etc. Refer to Figure 9 and Figure 10 , the shield machine includes a fuselage 100 and a cutter head 200. A partition 300 is arranged inside the fuselage 100, and a slurry balance chamber is formed between the cutter head 200 and the partition 300. A screw conveyor 400 is arranged at the bottom of the slurry balance chamber, and the screw conveyor 400 is used to output the soil and gravel in the slurry balance chamber outward. During the actual tunneling process of the shield machine, according to the different geological conditions in the front, there may be large particles of gravel in the slurry balance chamber. When there are too many large particles of gravel, the screw conveyor 400 may be blocked, and at this time, the slurry balance in the slurry balance chamber is broken, resulting in the shield machine being unable to continue working. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a shield tunnel mud circulation gravel device is proposed.

[0004] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0005] A shield tunnel mud circulation gravel device includes a soil collection box. A stirring device is rotatably connected inside the soil collection box. Flow guiding plates are respectively arranged on both sides of the soil collection box. A flow limiting device is installed on each flow guiding plate. The two flow limiting devices are located above the soil collection box. The speed of gravel entering the soil collection box is slowed down through the flow limiting device. The flow limiting device includes a base plate that slides on the flow guiding plate. A power device is installed on one side of the flow guiding plate and is used to drive the base plate to move. One side of the base plate is hinged with a swing plate. One side of the swing plate is fixedly connected with a flow limiting plate. One side of the flow limiting plate is fixedly connected with a plurality of flow limiting teeth. A plurality of crushing blades are arranged on the side wall of each flow limiting tooth. A first arc-shaped convex block is arranged on the upper side of the flow guiding plate, and a second arc-shaped convex block is arranged on the lower side of the swing plate. The first arc-shaped convex block and the second arc-shaped convex block are arranged correspondingly. During the sliding process of the base plate on the flow guiding plate, when the first arc-shaped convex block contacts the second arc-shaped convex block, the swing plate is squeezed and swings upward. When the second arc-shaped convex block leaves the first arc-shaped convex block, the swing plate swings downward under the action of gravity.

[0006] Preferably, the stirring device includes a stirring box. Grooves are arranged on both the upper and lower sides of the stirring box. The stirring box is rotatably connected inside the soil collection box. The stirring box is driven by a first motor, and a plurality of crushing teeth are arranged on the outer surface of the stirring box.

[0007] Preferably, a first liquid inlet pipe is provided at one end of the stirring box. The first liquid inlet pipe is communicated with the stirring box. A plurality of mounting holes are provided in the groove, and a plurality of one-way spray nozzles are installed in each mounting hole. A plurality of branch pipes are provided on the first liquid inlet pipe, and the branch pipes are connected to the one-way spray nozzles in one-to-one correspondence.

[0008] Preferably, a secondary flow buffering device is provided above the flow limiting device. The secondary flow buffering device includes a rotating column. A plurality of semi-circular plates are provided on the rotating column, and a plurality of slurry leakage grooves are provided on each semi-circular plate. A lifting plate is provided on the soil collecting box, and a second motor is installed on the lifting plate. The second motor is used to drive the rotating column to rotate.

[0009] Preferably, a liquid storage chamber is provided inside the rotating column. A plurality of through grooves communicated with the liquid storage chamber are provided on the rotating column. The through grooves are arranged in one-to-one correspondence with the semi-circular plates. A sliding plate is slidably connected in the through groove. A cross beam is fixedly connected inside the liquid storage chamber. A spring is fixedly connected between the cross beam and the sliding plate. A plurality of through holes communicated with the liquid storage chamber are provided on the side wall of the through groove. When the spring is in a free state, the sliding plate can block the through holes. A second liquid inlet pipe communicated with the liquid storage chamber is provided at the center of one side of the rotating column, and a bracket is provided on the second liquid inlet pipe.

[0010] Preferably, a guiding hole is provided on the cross beam. A guiding rod is slidably connected in the guiding hole. The guiding rod passes through the inner ring of the spring and is fixed to the sliding plate. The other end of the guiding rod is fixedly connected with an anti-detachment plate.

[0011] Preferably, a shielding plate is provided above the rotating column, and a plurality of conical teeth are provided on the lower side of the shielding plate.

[0012] The beneficial effects of the present invention: During the process of gravel and muck falling in the shield tunnel mud circulation gravel device provided by the present invention, they will first fall onto the flow limiting plate. The gravel and muck are blocked by the flow limiting teeth, so that the gravel and muck slowly fall into the soil collecting box. At the same time, the flow limiting plate can swing up and down during the forward and backward movement, which can prevent the gravel and muck from congesting at the flow limiting teeth. At the same time, during the forward and backward movement of the flow limiting plate, large pieces of gravel can also be crushed by the crushing blades. Description of the Drawings

[0013] Figure 1 is the basic structure diagram of a shield tunnel mud circulation gravel device provided by the present invention;

[0014] Figure 2 is the connection structure diagram of the secondary flow buffering device and the shielding plate;

[0015] Figure 3 is the basic structure diagram of the flow limiting device;

[0016] Figure 4 is the basic structure diagram of the secondary flow buffering device;

[0017] Figure 5It is a sectional view of the secondary slow flow device;

[0018] Figure 6 It is the basic structure diagram of the stirring device;

[0019] Figure 7 It is a sectional view of the stirring device;

[0020] Figure 8 It is the state diagram of the present invention installed on the shield machine;

[0021] Figure 9 It is Figure 8 Another perspective view of;

[0022] Figure 10 It is the basic structure diagram of the shield machine. Specific embodiments

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Embodiment 1

[0025] As Figure 1-9 shown, a slurry circulation gravel device for a shield tunnel in this embodiment is used in cooperation with a shield machine. The shield machine includes a fuselage 100 and a cutter head 200. A partition 300 is arranged in the fuselage 100. A slurry balance chamber is formed between the cutter head 200 and the partition 300. A screw conveyor 400 is arranged at the bottom of the slurry balance chamber. The screw conveyor 400 is used to output the soil and gravel in the slurry balance chamber outward.

[0026] A gravel device with slurry circulation for shield tunnels in this embodiment includes a soil collection box 1, which is installed at the bottom of the slurry balance chamber. A screw feeder 400 is connected to the soil collection box 1, and the soil and gravel in the soil collection box 1 are conveyed out through the screw feeder 400. A stirring device 6 is rotatably connected in the soil collection box 1. The stirring device 6 includes a stirring box 61. Grooves 62 are provided on both the upper and lower sides of the stirring box 61. The stirring box 61 is rotatably connected in the soil collection box 1 and is driven by a first motor 60. Multiple crushing teeth 63 are arranged on the outer surface of the stirring box 61. By driving the stirring box 61 to rotate with the first motor 60, the muck and rock in the soil collection box 1 can be stirred to prevent the muck and rock from congesting at the entrance of the screw feeder 400. One end of the stirring box 61 is provided with a first liquid inlet pipe 64, which is connected to the stirring box 61. Multiple installation holes are provided in the grooves 62, and multiple one-way spray nozzles 65 are installed in each installation hole. Multiple branch pipes 66 are arranged on the first liquid inlet pipe 64, and the branch pipes 66 are connected to the one-way spray nozzles 65 one by one. Additives are sprayed into the screw feeder 400 and the slurry balance chamber through the one-way spray nozzles 65, so that the additives are mixed with the soil muck, and through soil muck improvement, it can be recycled to adapt to different strata.

[0027] Flow guide plates 2 are respectively arranged on both sides of the soil collection box 1. The flow guide plates 2 are used to guide the muck into the soil collection box 1. A flow limiting device 3 is installed on each flow guide plate 2. The two flow limiting devices 3 are located above the soil collection box 1. The speed of gravel entering the soil collection box 1 is slowed down through the flow limiting device 3. The flow limiting device 3 includes a substrate 31, and the substrate 31 slides on the flow guide plate 2. A power device is installed on one side of the flow guide plate 2 and is used to drive the substrate 31 to move. The power device includes a hydraulic cylinder 313, which is rotatably connected to a partition plate 300. The telescopic end of the hydraulic cylinder 313 is hinged to a baffle 312. One side of the baffle 312 is fixedly connected to a fixing rod 311. The fixing rod 311 passes through a chute on the partition plate 300, and the partition plate 300 reciprocates in the chute. The fixing rod 311 is fixed to the substrate 31. The function of setting the baffle 312 is to block the chute to prevent the slurry from flowing out of the chute.

[0028] One side of the substrate 31 is hinged with a swing plate 32. One side of the swing plate 32 is fixedly connected with a current-limiting plate 33. One side of the current-limiting plate 33 is fixedly connected with a plurality of current-limiting teeth 34. A plurality of crushing blades 35 are arranged on the side wall of each current-limiting tooth 34. A first arc-shaped convex block 38 is arranged on the upper side of the guide plate 2. A second arc-shaped convex block 39 is arranged on the lower side of the swing plate 32. The first arc-shaped convex block 38 and the second arc-shaped convex block 39 are arranged correspondingly. During the sliding process of the substrate 31 on the guide plate 2, when the first arc-shaped convex block 38 contacts the second arc-shaped convex block 39, the swing plate 32 is squeezed and swings upward. When the second arc-shaped convex block 39 leaves the first arc-shaped convex block 38, the swing plate 32 swings downward under the action of gravity. During the falling process of the crushed stones and muck, they will first fall onto the current-limiting plate 33. The current-limiting teeth 34 block the crushed stones and muck, so that the crushed stones and muck slowly fall into the soil collection box 1. At the same time, the current-limiting plate 33 can swing up and down during the forward and backward movement, which can prevent the crushed stones and muck from congesting at the current-limiting teeth 34. At the same time, the large crushed stones can be crushed by the crushing blades 35 during the forward and backward movement of the current-limiting plate 33. At the same time, due to the continuous rotation of the stirring box 61, the crushing blades 35 below the current-limiting teeth 34 and the crushing teeth 63 can squeeze and crush the large crushed stones between them. At the same time, as the crushed stones slowly fall, the additives in the stirring box 61 are more likely to be evenly mixed with the crushed stones and muck.

[0029] Embodiment 2

[0030] On the basis of Embodiment 1, in order to prevent the current-limiting device 3 from being insufficient to limit a large amount of crushed stones, a secondary slow-flow device 4 is arranged above the current-limiting device 3. The secondary slow-flow device 4 includes a rotating column 41. A plurality of semi-circular plates 42 are arranged on the rotating column 41. A plurality of slurry leakage grooves are arranged on each semi-circular plate 42. A heightening plate is arranged on the soil collection box 1. A second motor 40 is installed on the heightening plate. The second motor 40 is used to drive the rotating column 41 to rotate. The second motor 40 drives the rotating column 41 to rotate continuously. The semi-circular plates 42 above the rotating column 41 can take away a part of the muck and crushed stones above the current-limiting device 3, which can reduce the pressure of the current-limiting device 3 and further improve the current-limiting effect. In addition, a shielding plate 5 is arranged above the rotating column 41. A plurality of conical teeth 51 are arranged on the lower side of the shielding plate 5. The shielding plate 5 prevents the muck and crushed stones falling from above from directly falling onto the rotating column 41. At the same time, the large-particle crushed stones in the semi-circular plate 42 can collide with the conical teeth 51 during the movement, and the large-particle crushed stones can be crushed by the conical teeth 51.

[0031] A liquid storage chamber is arranged inside the rotating column 41. A plurality of through grooves 43 communicating with the liquid storage chamber are provided on the rotating column 41. The through grooves 43 are arranged in one-to-one correspondence with the semi-circular plates 42. A sliding plate 46 is slidably connected in the through groove 43. A cross beam 48 is fixedly connected in the liquid storage chamber. A spring 410 is fixedly connected between the cross beam 48 and the sliding plate 46. A guide hole is arranged on the cross beam 48. A guide rod 49 is slidably connected in the guide hole. The guide rod 49 passes through the inner ring of the spring 410 and is fixed to the sliding plate 46. The other end of the guide rod 49 is fixedly connected with an anti-detachment plate 411. A plurality of through holes 47 communicating with the liquid storage chamber are arranged on the side wall of the through groove 43. When the spring 410 is in a free state, the sliding plate 46 can block the through holes 47. A second liquid inlet pipe 44 communicating with the liquid storage chamber is arranged at the center of one side of the rotating column 41. A bracket 45 is arranged on the second liquid inlet pipe 44. When the soil and gravel in the semi-circular plate 42 move above the rotating column 41, the gravel and soil in the semi-circular plate 42 will fall onto the upper part of the sliding plate 46 due to gravity. The sliding plate 46 moves downward due to the pressure of the gravel and soil. In this way, the through holes 47 are exposed. The additive in the liquid storage chamber will be ejected from the through holes 47 and be fully mixed with the gravel and soil in this part, further improving the mixing effect of the additive and the gravel. When the gravel and soil move to the lower part, the gravel and soil fall off, and the sliding plate 46 resets under the action of the spring and blocks the through holes 47 again.

Claims

1. A shield tunnel mud circulation stone crushing device, characterized in that: The invention comprises a soil collecting box (1), wherein a stirring device (6) is rotatably connected inside the soil collecting box (1), guide plates (2) are respectively arranged on both sides of the soil collecting box (1), and each of the guide plates (2) is provided with a flow limiting device (3), and two flow limiting devices (3) are located above the soil collecting box (1), and the speed at which crushed stones enter the soil collecting box (1) is slowed down by the flow limiting devices (3), and the flow limiting devices (3) comprise a base plate (31), and the base plate (31) slides on the guide plate (2), and a power device is arranged on one side of the guide plate (2), and the power device is used to drive the base plate (31) to move, and one side of the base plate (31) is hingedly connected to a swing plate (32), and one side of the swing plate (32) is fixedly connected to a flow limiting plate (33), and the flow limiting plate A plurality of flow-limiting teeth (34) are fixedly connected to one side of the guide plate (33), and a plurality of crushing blades (35) are arranged on the side wall of each flow-limiting tooth (34). A first arc-shaped protrusion (38) is arranged on the upper side of the guide plate (2), and a second arc-shaped protrusion (39) is arranged on the lower side of the swing plate (32). The first arc-shaped protrusion (38) and the second arc-shaped protrusion (39) are arranged correspondingly. When the base plate (31) slides on the guide plate (2), when the first arc-shaped protrusion (38) contacts the second arc-shaped protrusion (39), the swing plate (32) is squeezed and swung upward. When the second arc-shaped protrusion (39) leaves the first arc-shaped protrusion (38), the swing plate (32) swings downward under the action of gravity.

2. A shield tunnel mud circulation stone crushing device according to claim 1, characterized in that: The stirring device (6) comprises a stirring box (61), and grooves (62) are provided on both the upper and lower sides of the stirring box (61). The stirring box (61) is rotatably connected in the soil collecting box (1), and the stirring box (61) is driven by a first motor (60). A plurality of crushing teeth (63) are provided on the outer surface of the stirring box (61).

3. A shield tunnel mud circulation stone crushing device according to claim 2, characterized in that: A first liquid inlet pipe (64) is provided at one end of the stirring box (61), and the first liquid inlet pipe (64) is connected to the stirring box (61). A plurality of mounting holes are provided in the groove (62), and a plurality of one-way spray heads (65) are installed in each mounting hole. A plurality of branch pipes (66) are provided on the first liquid inlet pipe (64), and the branch pipes (66) are connected to the one-way spray heads (65) in a one-to-one correspondence.

4. A shield tunnel mud circulation stone crushing device according to claim 1, characterized in that: A secondary slow flow device (4) is arranged above the flow limiting device (3), and the secondary slow flow device (4) comprises a rotating column (41), a plurality of semicircular plates (42) are arranged on the rotating column (41), and a plurality of slurry leakage grooves are arranged on each of the semicircular plates (42). An elevated plate is arranged on the soil collecting box (1), and a second motor (40) is installed on the elevated plate. The second motor (40) is used to drive the rotating column (41) to rotate.

5. A shield tunnel mud circulation stone crushing device according to claim 4, characterized in that: A liquid storage chamber is arranged inside the rotating column (41), and a plurality of through grooves (43) connected to the liquid storage chamber are arranged on the rotating column (41), and the through grooves (43) are arranged one by one with the semicircular plates (42), a slide plate (46) is slidably connected in the through grooves (43), a cross beam (48) is fixedly connected in the liquid storage chamber, a spring (410) is fixedly connected between the cross beam (48) and the slide plate (46), a plurality of through holes (47) connected to the liquid storage chamber are arranged on the side wall of the through groove (43), and when the spring (410) is in a free state, the slide plate (46) can block the through holes (47), and a second liquid inlet pipe (44) connected to the liquid storage chamber is arranged at the center of one side of the rotating column (41), and a bracket (45) is arranged on the second liquid inlet pipe (44).

6. A shield tunnel mud circulation stone crushing device according to claim 5, characterized in that: A guide hole is provided on the cross beam (48), a guide rod (49) is slidably connected in the guide hole, the guide rod (49) passes through the inner circle of the spring (410) and is fixed to the slide plate (46), and the other end of the guide rod (49) is fixedly connected to the anti-falling plate (411).

7. The shield tunnel mud circulation stone crushing device according to claim 5, characterized in that: A shielding plate (5) is arranged above the rotating column (41), and a plurality of conical teeth (51) are arranged on the lower side of the shielding plate (5).

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