Residue soil conveying system for urban rail underground excavation tunnel construction

Abstract

The utility model discloses a muck conveying system for urban rail underground excavation tunnel construction, which relates to the technical field of underground engineering non-excavation construction equipment, and comprises a screw conveyer with a feed end communicated with a muddy water cabin through a discharge port, the muck conveying system further comprises a plurality of guide rods with one ends fixedly connected to the back face of the cutter head, an adjusting plate connected to the other ends of the guide rods at the same time, and a plurality of adjusting rods with one ends fixedly connected to the end of the outer edge of the adjusting plate. The guide rods, the adjusting plate and the adjusting rods are all arranged in the muddy water cabin, the adjusting rods are evenly distributed on the adjusting plate in the circumferential direction, and the rotating circumference of the end portion of the other end of each adjusting rod is located in front of an opening of the discharging opening. The muddy water cabin has the effect of improving the technical problem of possible blockage in the muddy water cabin in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of trenchless construction equipment for underground engineering, and in particular to a slag conveying system for construction of urban rail dark-cut tunnels. Background Art

[0002] In the underground excavation of urban rail tunnels using a shield machine, as the shield machine cutter head advances, a mixture of crushed stone, soil and water (natural water and / or cooling water) produced by its crushing is discharged from the cutter head soil inlet to the back of the cutter head, accumulated in the mud and water tank and waits for transportation by the subsequent transportation system.

[0003] Generally, as described in the Chinese patents disclosed in application numbers CN202410162457.6 and CN202410030253.7, the conveying system in the prior art generally includes a screw conveyor, a pump, a belt conveyor and a discharge pipe, etc.; during the conveying process, the screw conveyor is arranged at an angle, and its feed end is the lower end and is connected to the mud and water tank, and the mixture is discharged through the screw conveyor to achieve transportation.

[0004] However, the speed of cutter disc crushing, the softness of soil structure and the power of screw conveyor will directly affect the residual amount of mixture in the mud and water tank. When the residual amount is too much and the mixture is too thick, it may cause blockage at the feed end of screw conveyor and affect excavation efficiency. Utility Model Content

[0005] In order to improve the technical problem of possible blockage in the mud and water tank in the prior art, the present application provides a slag conveying system for urban rail dark tunnel construction.

[0006] The present application provides a slag conveying system for urban rail dark tunnel construction, which adopts the following technical solution:

[0007] A slag conveying system for urban rail dark tunnel construction is used to convey a mixture stored in a mud and water tank between a shield machine body and a cutter disc. A discharge port is provided at the lower end of the shield machine body. The slag conveying system comprises a screw conveyor whose feed end is connected to the mud and water tank through the discharge port. The slag conveying system also comprises a plurality of guide rods whose one end is fixedly connected to the back of the cutter disc, an adjustment plate connected to the other end of each of the guide rods, and a plurality of adjustment rods whose one end is fixedly connected to the outer edge end of the adjustment plate. Each of the guide rods, the adjustment plate and the adjustment rods are arranged in the mud and water tank. Each of the adjustment rods is evenly distributed circumferentially on the adjustment plate, and the other end of each of the adjustment rods rotates in a circle located in front of the opening of the discharge port.

[0008] Optionally, each of the adjusting rods is provided with a first inclined surface inclined toward the rotation direction of the cutter disc.

[0009] Optionally, the lengths of the plurality of adjusting rods are not equal.

[0010] Optionally, each of the guide rods is parallel to the rotation axis of the cutter disc, and the adjustment plate is slidably connected to each of the guide rods at the same time; each of the guide rods is sleeved with a spring, and both ends of the spring are respectively fixedly connected to the cutter disc and the adjustment plate.

[0011] Optionally, a plurality of pulling mechanisms evenly distributed with the cutter disc rotation axis as the central axis are further provided in the mud and water tank, the pulling mechanism comprising a guide assembly fixedly connected to the adjustment plate away from the cutter disc and a force-applying assembly fixedly connected to the shield machine body, the guide assembly being provided with a guide surface facing the adjustment plate, and the guide surface cooperates with the force-applying assembly.

[0012] Optionally, the guide assembly includes a fixed block fixedly connected to the adjustment plate and a guide block fixedly connected to the fixed block, and the guide surface is arranged on a side of the guide block facing the adjustment plate.

[0013] Optionally, the guide surface includes two second inclined surfaces and a plane whose two ends are simultaneously connected to the two second inclined surfaces.

[0014] Optionally, the force-applying assembly includes a fixed rod with one end fixedly connected to the shield machine body and a force-applying rod with one end fixedly connected to the fixed rod, and the other end of the force-applying rod cooperates with the guide surface.

[0015] Optionally, the force applying assembly further includes a roller rotatably connected to the other end of the force applying rod.

[0016] Optionally, a corrugated protective sleeve is provided on the outer side of each of the springs, and two ends of the corrugated protective sleeve are respectively fixedly connected to the cutter disc and the adjustment plate.

[0017] In summary, this application includes the following beneficial technical effects:

[0018] 1. The rotation of the cutter disc drives the adjustment plate to rotate, so that multiple adjustment rods rotate synchronously to stir the mixed materials accumulated in the mud and water tank to reduce the possibility of accumulation and improve the technical problem of possible blockage in the mud and water tank in the prior art;

[0019] 2. By utilizing the elastic force of the spring and the guiding effect of the guide surface, the adjusting rod is pulled by the force-applying component to make the adjusting rod move back and forth, so as to push the mixed material toward the discharge port and improve the conveying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a first partial cross-sectional view of the slag conveying system of the utility model.

[0021] Figure 2It is a second partial cross-sectional view of the slag conveying system of the utility model.

[0022] Figure 3 yes Figure 2 Another perspective structure diagram.

[0023] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0024] Explanation of the accompanying reference numerals: 1. Shield body; 11. Discharge port; 12. Drive shaft; 2. Cutter head; 21. Soil inlet; 3. Mud and water compartment; 4. Guide rod; 41. Nut; 5. Adjustment plate; 6. Adjustment rod; 61. First inclined plane; 7. Spring; 71. Corrugated protective cover; 8. Guide assembly; 81. Fixed block; 82. Guide block; 83. Guide surface; 831. Second inclined plane; 832. Plane; 9. Force-applying assembly; 91. Fixed rod; 92. Force-applying rod; 93. Roller. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-4 This application is described in further detail.

[0026] It should be noted that the key improvement of this application is how to discharge the mixture accumulated in the mud and water chamber 3 between the shield machine body 1 and the cutter head 2 on the basis of the existing conveying system. The specific structures of the shield machine body 1 and the cutter head 2 are conventional technologies in the field, and this application does not elaborate on them in detail. However, in order to facilitate the understanding of this application, the conventional structure of the shield machine body 1 and the cutter head 2 is briefly described below.

[0027] Among them, the conveying system of the prior art usually includes a screw conveyor, a pump, a belt conveyor and a discharge pipe; during the conveying process, the screw conveyor is tilted and tilted as a whole, with the feed end at the lower end and connected to the mud and water tank 3, and the mixture is discharged through the screw conveyor to achieve transportation.

[0028] A discharge port 11 is provided at the front lower end of the shield body 1 near the cutter head 2 to connect with the screw conveyor, so that the sediment mixture in the mud and water tank 3 can be discharged smoothly through the screw conveyor and the subsequent conveying system.

[0029] The shield machine body 1 is a cylindrical or tubular structure, consisting of a steel shell, a front shield plate, a rear shield plate and a side wall; a pressure-bearing partition is provided at the front end of the shield machine body 1, which is used to support the drive of the cutter head 2 and isolate the soil bin from the working space behind. A thrust cylinder is also provided on the shield machine body 1, and the pressure of the thrust cylinder can act on the excavation surface through the pressure-bearing partition to support and stabilize the excavation surface.

[0030] In this embodiment, a drive mechanism is provided on the shield body 1, and a drive shaft 12 of the drive mechanism coaxially passes through the pressure-bearing partition and is connected to the cutter head 2 to drive the cutter head 2 to rotate. The drive mechanism is specifically composed of a hydraulic motor or an electric motor, a reducer, a gear pair and other components.

[0031] A tunneling system is provided on the shield machine body 1. The tunneling system refers to the mechanism for the shield machine to advance forward in the soil layer, and is mainly composed of a group of jacks arranged in a ring inside the shield. These jacks extend backward by controlling the cylinder rods to provide forward tunneling force for the shield machine.

[0032] The shield machine body 1 is also provided with a segment assembly system and a grouting system. The segment assembly system is arranged at the tail of the shield machine and is composed of a segment assembly manipulator and a true circle retainer. The system is responsible for assembling the prefabricated tunnel segments into rings to form the lining structure of the tunnel. The grouting system is mainly used to inject a curing agent or concrete to reinforce the soil and form a stable lining during the advancement of the shield machine.

[0033] The cutterhead 2 is the cutting tool at the front end of the shield machine. It is usually round or arc-shaped and is equipped with cutting tools and panels to stabilize the excavation surface. It cuts and excavates the soil by rotating and pushing. The cutters include roller cutters (such as single-edge roller cutters, double-edge roller cutters, three-edge roller cutters, etc.), cutters, edge scrapers, super-digging cutters (profile cutters), gauge cutters, etc. Different cutters are suitable for different geological conditions. For example, roller cutters are suitable for hard rock excavation, while cutters are suitable for soft soil excavation.

[0034] A plurality of soil inlets 21 are provided at intervals in the circumferential direction on the cutter disc 2, and the plurality of soil inlets 21 are simultaneously connected to the mud and water tank 3, so as to guide the crushed materials into the mud and water tank 3, and transport them through a subsequent transmission system.

[0035] Embodiment 1 of the present application discloses a slag conveying system for urban rail dark-digging tunnel construction, as described in detail below.

[0036] Reference Figure 1 and Figure 2 The slag conveying system for urban rail dark tunnel construction is used to convey the mixture stored in the mud and water tank 3 between the shield machine body 1 and the cutter head 2. A discharge port 11 is opened at the lower end of the shield machine body 1. The slag conveying system includes a screw conveyor whose feed end is connected to the mud and water tank 3 through the discharge port 11. The slag conveying system also includes a plurality of guide rods 4 fixedly connected to the back of the cutter head 2 at one end, an adjustment plate 5 connected to the other end of each guide rod 4, and a plurality of adjustment rods 6 fixedly connected to the outer edge end of the adjustment plate 5 at one end. Each guide rod 4, the adjustment plate 5 and each adjustment rod 6 are arranged in the mud and water tank 3, and each adjustment rod 6 is evenly distributed on the adjustment plate 5 in the circumferential direction, and the other end of each adjustment rod 6 is located in front of the opening of the discharge port 11 in the rotation circle.

[0037] The mixture accumulates in the mud and water tank 3, and accumulates at the discharge port 11 under the action of gravity, so as to be discharged by the screw conveyor; in this process, each guide rod 4, the adjustment plate 5 and each adjustment rod 6 rotates simultaneously under the rotation of the cutter disc 2, so that each adjustment rod 6 stirs the falling mixture and the mixture accumulated at the discharge port 11 to reduce the possibility of accumulation, thereby improving the technical problem of possible blockage in the mud and water tank in the prior art.

[0038] When in use, the cutter disc 2 rotates, moves forward and crushes, and the crushed mixed material enters from the multiple soil inlets 21 and accumulates in the mud and water tank 3 to be discharged by the screw conveyor.

[0039] The other end of each guide rod 4 is spaced relative to the shield machine body 1 to prevent the other end of each guide rod 4 from rotating and causing friction with the shield machine body 1 , and to facilitate the disassembly and assembly of the adjustment plate 5 .

[0040] The adjustment plate 5 is provided with a through hole for the driving shaft 12 to pass through and rotate.

[0041] Each adjusting rod 6 is provided with a first inclined surface 61 inclined toward the rotation direction of the blade disc 2, so that during the rotation of the adjusting rod 6, the first inclined surface 61 can be used to push the accumulated mixture toward the discharge port 11, thereby accelerating the discharge of the mixture and reducing the possibility of blockage.

[0042] Furthermore, the lengths of the plurality of adjusting rods 6 are not equal, so that different degrees of stirring operations on the piled mixture can be achieved through different adjusting rods 6, thereby improving the stirring effect.

[0043] In one embodiment, each guide rod 4 is fixedly connected to the adjustment plate 5 .

[0044] In another embodiment, each guide rod 4 is parallel to the rotation axis of the cutter disc 2, that is, parallel to the drive shaft 12, and the adjustment plate 5 is slidingly connected to each guide rod 4 at the same time; each guide rod 4 is sleeved with a spring 7, and the two ends of the spring 7 are respectively fixedly connected to the cutter disc 2 and the adjustment plate 5.

[0045] When the mixture enters the mud and water tank 3, it impacts various local positions of the adjustment plate 5, causing the adjustment plate 5 to move, so that the rotational circumferential position of the adjustment plate 5 changes, and the mixture accumulated at different positions is disturbed.

[0046] The adjusting plate 5 is provided with a sliding hole through which the guide rod 4 slides.

[0047] The outer side of each spring 7 is provided with a corrugated protective sleeve 71 , and the two ends of the corrugated protective sleeve 71 are respectively fixedly connected to the cutter disc 2 and the adjustment plate 5 , so that the spring 7 is protected by the corrugated protective sleeve 71 .

[0048] The corrugated protective sleeve 71 can be made of rubber.

[0049] Reference Figure 3 and Figure 4 In the above another embodiment, on the basis that the adjustment plate 5 is simultaneously slidably connected to each guide rod 4, a plurality of pulling mechanisms are also arranged in the mud and water tank 3 with the rotation axis of the cutter disc 2 as the central axis, and the pulling mechanism includes a guide assembly 8 fixedly connected to the adjustment plate 5 away from the cutter disc 2 and a force assembly 9 fixedly connected to the shield body 1, and the guide assembly 8 is provided with a guide surface 83 facing the adjustment plate 5, and the guide surface 83 cooperates with the force assembly 9.

[0050] The first inclined surface 61 faces the shield machine body 1 , so that as the adjustment plate 5 slides, the mixture is pushed toward the discharge port 11 of the shield machine body 1 by the first inclined surface 61 .

[0051] During the rotation of the cutter head 2, the guide surface 83 cooperates with the force-applying component 9, so that the guide component 8 and the adjustment plate 5 move toward the shield body 1 at the same time. After passing through the guide surface 83, the adjustment plate 5 slides in the direction under the action of the spring 7, so that the adjustment plate 5 slides back and forth to continuously push the extruded mixture toward the discharge port 11, thereby improving the technical problem that the mud and water tank may be blocked in the prior art.

[0052] The guide assembly 8 includes a fixed block 81 fixedly connected to the adjustment plate 5 and a guide block 82 fixedly connected to the fixed block 81 , and a guide surface 83 is arranged on a side of the guide block 82 facing the adjustment plate 5 .

[0053] The guide surface 83 includes two second inclined surfaces 831 and a plane 832 with two ends connected to the two second inclined surfaces 831. The guide block 82 cooperates with the force applying component 9 to form a smooth guide structure through the two second inclined surfaces 831, so that the adjustment plate 5 slides smoothly and moves.

[0054] By providing two second inclined surfaces 831 and one plane 832 , the guide block 82 as a whole forms an isosceles trapezoidal structure.

[0055] The plane 832 is arranged so that when the force-applying assembly 9 cooperates with the plane 832 , the adjustment plate 5 keeps rotating on the plane within a certain period of time, so that the adjustment rod 6 forms a continuous propulsion effect.

[0056] The force-applying assembly 9 includes a fixed rod 91 with one end fixedly connected to the shield machine body 1 and a force-applying rod 92 with one end fixedly connected to the fixed rod 91 , and the other end of the force-applying rod 92 cooperates with the guide surface 83 .

[0057] As the adjusting plate 5 rotates, the end of the force applying rod 92 cooperates with the guide surface 83 , so that the adjusting plate 5 slides.

[0058] The force applying assembly 9 further includes a roller 93 rotatably connected to the other end of the force applying rod 92 , so as to reduce friction relative to the guide surface 83 by rolling of the roller 93 .

[0059] The distance between the plane 832 on the guide block 82 and the adjustment plate 5 is greater than the diameter of the roller 93 to ensure smooth passage of the roller 93 .

[0060] On the basis of the above embodiment, an annular groove (not shown in the figure) is opened on the guide surface 83 , and the annular groove forms a rolling path of the roller 93 , so as to form a limiting function of the roller 93 through the annular groove.

[0061] On the basis of the above embodiment, at least one nut 41 is threadedly connected to the other end of each guide rod 4 to limit the sliding distance of the adjustment plate 5 and prevent the adjustment plate 5 from being separated from the guide rod 4 .

[0062] In the figure, two nuts 41 are shown, but there may also be three, four, five, etc.

[0063] Embodiment 2 of the present application further discloses a kind of urban rail dark tunnel construction equipment, which comprises the slag conveying system for urban rail dark tunnel construction as described in embodiment 1, and also comprises a shield machine body 1 and a cutter head 2, a mud and water tank 3 is formed between the shield machine body 1 and the cutter head 2, and the slag conveying system for urban rail dark tunnel construction is installed in the mud and water tank 3.

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A slag conveying system for urban rail dark tunnel construction, used for conveying a mixture stored in a mud and water tank (3) between a shield machine body (1) and a cutter head (2), wherein a discharge port (11) is provided at the lower end of the shield machine body (1), and the slag conveying system comprises a screw conveyor whose feed end is connected to the mud and water tank (3) through the discharge port (11), and characterized in that: The slag conveying system further comprises a plurality of guide rods (4) one end of which is fixedly connected to the back of the cutter disc (2), an adjustment plate (5) connected to the other end of each of the guide rods (4), and a plurality of adjustment rods (6) one end of which is fixedly connected to the outer edge end of the adjustment plate (5), each of the guide rods (4), the adjustment plate (5) and each of the adjustment rods (6) are arranged in the mud and water tank (3), each of the adjustment rods (6) is evenly distributed on the adjustment plate (5) in the circumferential direction, and the other end of each of the adjustment rods (6) is located in front of the opening of the discharge port (11) in the rotation circle.

2. The slag conveying system for urban rail tunnel construction according to claim 1 is characterized by: Each of the adjustment rods (6) is provided with a first inclined surface (61) inclined towards the rotation direction of the cutter disc (2).

3. The slag conveying system for urban rail tunnel construction according to claim 1 is characterized in that: The lengths of the plurality of adjusting rods (6) are unequal.

4. The slag conveying system for urban rail dark tunnel construction according to claim 1 is characterized by: Each of the guide rods (4) is parallel to the rotation axis of the cutter disc (2), and the adjustment plate (5) is slidably connected to each of the guide rods (4); each of the guide rods (4) is sleeved with a spring (7), and the two ends of the spring (7) are respectively fixedly connected to the cutter disc (2) and the adjustment plate (5).

5. The slag conveying system for urban rail dark tunnel construction according to claim 4 is characterized by: The mud and water chamber (3) is also provided with a plurality of pulling mechanisms uniformly distributed with the rotation axis of the cutter disc (2) as the central axis, the pulling mechanism comprising a guide assembly (8) fixedly connected to the adjustment plate (5) away from the cutter disc (2) and a force-applying assembly (9) fixedly connected to the shield machine body (1), the guide assembly (8) being provided with a guide surface (83) facing the adjustment plate (5), the guide surface (83) cooperating with the force-applying assembly (9).

6. The slag conveying system for urban rail tunnel construction according to claim 5 is characterized by: The guide assembly (8) comprises a fixed block (81) fixedly connected to the adjustment plate (5) and a guide block (82) fixedly connected to the fixed block (81), and the guide surface (83) is arranged on a side of the guide block (82) facing the adjustment plate (5).

7. The slag conveying system for urban rail dark tunnel construction according to claim 5 is characterized by: The guide surface (83) comprises two second inclined surfaces (831) and a plane (832) with both ends connected to the two second inclined surfaces (831).

8. The slag conveying system for urban rail dark tunnel construction according to claim 5 is characterized by: The force-applying assembly (9) comprises a fixing rod (91) having one end fixedly connected to the shield machine body (1) and a force-applying rod (92) having one end fixedly connected to the fixing rod (91), and the other end of the force-applying rod (92) cooperates with the guide surface (83).

9. The slag conveying system for urban rail dark tunnel construction according to claim 8 is characterized by: The force applying assembly (9) further comprises a roller (93) rotatably connected to the other end of the force applying rod (92).

10. The slag conveying system for urban rail dark tunnel construction according to claim 4, characterized in that: The outer side of each of the springs (7) is provided with a corrugated protective sleeve (71), and the two ends of the corrugated protective sleeve (71) are respectively fixedly connected to the cutter disc (2) and the adjustment plate (5).

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