Underground excavation construction tunneling device for urban rail station

Abstract

The utility model discloses an urban rail station underground excavation construction tunneling device, which relates to the field of underground engineering non-excavation construction equipment, and comprises a shield tunneling machine body, a cutterhead and a slurry discharge pipe, the cutterhead is provided with a plurality of soil inlets, the back surface of the cutterhead is fixedly connected with a plurality of material guide pipes, and the outer ends of the material guide pipes are communicated with the soil inlets one by one; a circular plate coaxial with the cutter head is fixed to the inner end of each material guide pipe at the same time, the circular plates are communicated with the inner ends of the material guide pipes at the same time, material guide mechanisms fixedly connected to the shield tunneling machine body are arranged on the inner sides of the circular plates, and the circular plates and the material guide mechanisms are arranged at intervals and form a crushing space; a crushing mechanism is arranged in the crushing space, the material guiding mechanism is provided with a guiding-in opening communicated with the crushing space and a guiding-out opening communicated with the slurry discharging pipe, and the guiding-in opening is located above the guiding-out opening in space. The device has the effect that the technical problem that in the equipment tunneling process in the prior art, the slurry discharging pipe is prone to being blocked is solved.

Description

Technical Field

[0001] The present application relates to the field of trenchless construction equipment for underground projects, and in particular to a tunneling device for underground excavation construction of urban rail stations. Background Art

[0002] There are several main construction methods for urban underground pipeline construction, including pipe jacking, shield tunneling, horizontal directional drilling, etc. A Chinese patent with announcement number CN111636885B and announcement date July 1, 2022 discloses a pipe jacking machine and a recyclable construction method for its main engine, wherein the pipe jacking machine includes a pipe jacking machine main engine and a jacking system, and the pipe jacking machine main engine includes a shield body, a cutter disc, a main drive, etc. An inner sleeve is provided in the shield body, and the main drive and the cutter disc are installed in the inner sleeve, and the cutter disc is a variable diameter cutter disc, and the inner sleeve and the shield body are detachably connected, and the minimum diameter of the cutter disc can be smaller than the diameter of the inner hole of the shield body.

[0003] That is, during the construction process, the cut and crushed soil and rock slag is discharged from the soil inlet of the cutter disc to the back of the cutter disc and discharged from the slurry discharge pipe. However, during the construction process under complex geological conditions, when encountering foreign objects such as stones with larger particle sizes, especially when natural water or cooling water mixes the stone slag and soil into blocks during crushing, because all the foreign objects such as stones are discharged from the slurry discharge pipe at the same time, it is easy to block the slurry discharge pipe, resulting in the inability to carry out construction continuously. Utility Model Content

[0004] In order to improve the technical problem of blockage of the slurry discharge pipe that is prone to occur during the excavation process of the equipment in the prior art, the present application provides a tunneling device for dark excavation construction of urban rail stations.

[0005] The present application provides a tunneling device for underground excavation of urban rail stations, which adopts the following technical solution:

[0006] A tunneling device for dark excavation construction of urban rail stations comprises a shield machine body, a cutterhead rotatably connected to the shield machine body, and a slurry discharge pipe coaxially installed on the shield machine body, the cutterhead being provided with a plurality of soil inlets, a plurality of guide pipes whose outer ends are connected one by one to the soil inlets are fixedly connected to the back of the cutterhead, a circular plate coaxial with the cutterhead is fixed to the inner end of each of the guide pipes, the circular plate is connected to the inner end of each of the guide pipes, a guide mechanism fixedly connected to the shield machine body is arranged on the inner side of the circular plate, the circular plate and the guide mechanism are spaced apart and form a crushing space, a crushing mechanism is arranged in the crushing space, the guide mechanism is provided with an inlet connected to the crushing space and a outlet connected to the slurry discharge pipe, and the inlet is spatially located above the outlet.

[0007] Optionally, the crushing mechanism includes a plurality of long rods with one end fixedly connected to the back of the cutter disc and a plurality of short rods with one end fixedly connected to the shield machine body, and each of the long rods is located on a different circumference relative to each of the short rods and is staggered.

[0008] Optionally, the crushing mechanism further comprises a plurality of pusher plates fixedly connected to the circular plate and / or the cutter disc, and the plurality of pusher plates are circumferentially spaced relative to the rotation axis of the cutter disc.

[0009] Optionally, each opening of the circular plate connected to the inner end of each material guide tube is opened between two pushing plates, and a plurality of the long rods and a plurality of the short rods are arranged between the two pushing plates.

[0010] Optionally, each of the push plates is provided with an avoidance hole for the short rod to pass through.

[0011] Optionally, each of the push plates is spaced apart from the material guiding mechanism.

[0012] Optionally, each of the push plates is spaced apart from the material guiding mechanism.

[0013] Optionally, the material guiding mechanism further includes a sealing plate fixedly connected to the outer ring plate and the other end of the inner ring plate, and the sealing plate is simultaneously sealed at the end of the slurry discharge pipe.

[0014] Optionally, a plurality of the guide outlets are spaced apart from each other, and each of the guide outlets opens upward and / or obliquely upward.

[0015] Optionally, the slurry discharge pipe is arranged obliquely, and the end connected to the material guiding mechanism is an upwardly inclined end.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] 1. Use multiple guide pipes to separate and divert the soil-rock slurry mixture that is crushed at the same time, reduce the possibility of the soil-rock slurry mixture directly mixing into larger block structures, and use the crushing function of the crushing mechanism in the crushing space to further crush the larger blocks. At the same time, use the crushing mechanism to push the material to the inlet to achieve diversion and export, so as to improve the technical problem of slurry discharge pipe blockage that is easy to occur during the excavation of equipment in the existing technology;

[0018] 2. The relative rotation formed by multiple long rods and multiple short rods is used to crush the materials in the crushing space, and the crushed materials are guided into the material guide mechanism under the guidance of the push plate to achieve the export. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial cross-sectional view of a tunneling device for underground excavation construction of a urban rail station according to the utility model.

[0020] Figure 2 It is a partial structural diagram of a tunneling device for underground excavation construction of a urban rail station according to the utility model.

[0021] Figure 3 yes Figure 2 A partial enlarged view of .

[0022] Figure 4 It is an exploded view of a circular plate of a tunneling device for underground excavation construction of a urban rail station according to the utility model.

[0023] Figure 5 It is an exploded view of a material guide mechanism of a tunneling device for underground excavation construction of a city rail station according to the utility model.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. Shield body; 11. Driving shaft; 2. Cutter head; 21. Soil inlet; 3. Slurry discharge pipe; 4. Material guide pipe; 5. Circular plate; 51. Fixed ring plate; 511. Ring groove; 52. Rotating ring plate; 521. Ring block; 6. Material guide mechanism; 61. Outer ring plate; 611. Inlet; 62. Inner ring plate; 621. Outlet; 63. Sealing plate; 7. Crushing mechanism; 71. Long rod; 72. Short rod; 73. Pushing plate; 731. Avoidance hole. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 This application is described in further detail.

[0026] It should be noted that the key improvement of this application is how to crush and discharge the mixed material on the back of the cutter head 2. The specific structures of the shield 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 body 1 and the cutter head 2 is briefly described below.

[0027] 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.

[0028] In this embodiment, a drive mechanism is provided on the shield body 1, and a drive shaft 11 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The embodiment of the present application discloses a tunneling device for underground excavation construction of a city rail station, which is described in detail below.

[0033] Reference Figures 1 to 3 The tunneling device for dark excavation construction of urban rail stations includes a shield machine body 1, a cutter head 2 rotatably connected to the shield machine body 1, and a slurry discharge pipe 3 coaxially installed on the shield machine body 1. The cutter head 2 is provided with a plurality of soil inlets 21. A plurality of guide pipes 4 whose outer ends are connected to the soil inlets 21 one by one are fixedly connected to the back of the cutter head 2. A circular plate 5 coaxial with the cutter head 2 is fixed to the inner end of each guide pipe 4. The circular plate 5 is connected to the inner end of each guide pipe 4 at the same time. A guide mechanism 6 fixedly connected to the shield machine body 1 is arranged on the inner side of the circular plate 5. The circular plate 5 and the guide mechanism 6 are spaced apart to form a crushing space. A crushing mechanism 7 is arranged in the crushing space. The guide mechanism 6 is provided with an inlet 611 connected to the crushing space and a outlet 621 connected to the slurry discharge pipe 3. The inlet 611 is spatially located above the outlet 621.

[0034] A plurality of guide pipes 4 will separate and divert the soil-rock slurry mixture that is crushed at the same time to prevent direct mixing into blocks. When the inner end of the guide pipe 4 opens downward or obliquely downward as the cutter disc 2 rotates, the material is introduced into the crushing space. Some fine stone materials directly enter the introduction port 611 under the action of gravity to be discharged, while large pieces of material are further crushed by the crushing mechanism 7. The crushed material enters the introduction port 611 again as the cutter disc 2 rotates to be discharged, so as to improve the technical problem of clogging of the slurry discharge pipe that is prone to occur during the excavation process of the equipment in the prior art.

[0035] The back side of the cutter head 2 refers to its non-digging side, that is, its digging side is the front side.

[0036] In the embodiment of the present application, the slurry discharge pipe 3 is relatively located on the lower side of the driving shaft 11, and the slurry discharge pipe 3 is inclined, and its end connected to the material guiding mechanism 6 is an upward inclined end, so as to accelerate the discharge of materials through the inclined state of the slurry discharge pipe 3.

[0037] The material guide pipe 4 is in an “L” shape as a whole, with one end (outer end) being open and connected to the soil inlet 21 , and the other end (inner end) being open and connected to the crushing space formed by the circular plate 5 and the material guide mechanism 6 .

[0038] Based on the above embodiments, Figure 3 and Figure 4 The circular plate 5 includes a fixed ring plate 51 and a rotating ring plate 52. One end of the fixed ring plate 51 is fixedly connected to the shield body 1, and the outer side of the rotating ring plate 52 is fixedly connected to the inner end of each material guide pipe 4, and one end is fixedly connected to the back of the cutter head 2.

[0039] A plurality of through holes are formed through the side wall of the rotating ring plate 52 so as to be connected with each material guide pipe 4 through each of the through holes.

[0040] A ring groove 511 is formed at the other end of the fixed ring plate 51 , and a ring block 521 adapted and slidably connected to the ring groove 511 is formed at the other end of the rotating ring plate 52 to achieve relative rotation connection between the fixed ring plate 51 and the rotating ring plate 52 .

[0041] The fixed ring plate 51 forms a partition between the crushing space and the external space, thereby preventing the crushed materials from leaking out from one end side of the fixed ring plate 51 .

[0042] Reference Figure 3 and Figure 5 The material guiding mechanism 6 includes an outer ring plate 61 and an inner ring plate 62, both of which are fixedly connected to the shield body 1 at one end. The outer ring plate 61 is arranged on the inner side of the inner ring plate 62 at an interval, and the outer ring plate 61 is coaxially arranged with the circular plate 5. The inlet 611 is opened on the outer ring plate 61, and the outlet 621 is opened between the outer ring plate 61 and the inner ring plate 62 and passes through the side wall of the slurry discharge pipe 3. The other ends of the outer ring plate 61 and the inner ring plate 62 are abutted against the cutter head 2.

[0043] The material enters between the outer ring plate 61 and the inner ring plate 62 through the inlet 611 , and after being guided by the outer ring plate 61 , enters the slurry discharge pipe 3 through the outlet 621 and is discharged.

[0044] That is, the outer ring plate 61 and the circular plate 5 are spaced apart from each other and form a crushing space.

[0045] The drive shaft 11 passes through the inner ring plate 62 to achieve connection with the cutter disc 2 , that is, the inner ring plate 62 forms a protective installation for the drive shaft 11 .

[0046] Among them, there are multiple inlet ports 611 spaced apart, specifically two, three, four, five, etc., and each inlet port 611 opens upward and / or tilted upward, so that when the guide tube 4 is rotated to an inclined or vertical state with the inner end facing downward, it is ensured that the material quickly enters between the guide outer ring plate 61 and the inner ring plate 62 to be discharged.

[0047] There are two outlets 621, which penetrate through two opposite side walls of the slurry discharge pipe 3 to ensure timely discharge of the mixed material.

[0048] Based on the above embodiments, the opening size of the outlet 621 is smaller than the inner diameter of the slurry discharge pipe 3, and / or the opening size of the inlet 611 is smaller than the opening size of the outlet 621, so as to control the particle size of the mixed material entering the slurry discharge pipe 3 to be smaller than its inner diameter, thereby ensuring smooth discharge.

[0049] On the basis of the above embodiment, the material guiding mechanism 6 also includes a sealing plate 63 fixedly connected to the other end of the outer ring plate 61 and the inner ring plate 62, and the sealing plate 63 is simultaneously sealed at the end of the slurry discharge pipe 3, so as to prevent the material from entering between the outer ring plate 61 and the inner ring plate 62 through the sealing effect of the sealing plate 63, thereby increasing the rotational friction of the cutter disc 2.

[0050] Reference Figure 2 and Figure 3 The crushing mechanism 7 includes a plurality of long rods 71 ​​with one end fixedly connected to the back of the cutter head 2 and a plurality of short rods 72 with one end fixedly connected to the shield machine body 1. The long rods 71 ​​are located on different circumferences relative to the short rods 72 and are staggered.

[0051] During the rotation of the cutter disc 2, the multiple long rods 71 ​​are driven to rotate, and the materials in the crushing space are crushed under the joint action of the short rods 72. The materials are brought to the guide inlet 611 through the rotation of the multiple long rods 71 ​​and discharged.

[0052] The number of the long rods 71 ​​and the number of the short rods 72 can be two, three, four, etc.

[0053] In addition, along the radial direction of the cutter disc 2, the radial spacing between the long rod 71 and the short rod 72 is not greater than the opening size of the introduction port 611, so as to control the particle size of the mixture material entering the material guiding mechanism 6 and ensure smooth discharge.

[0054] The crushing mechanism 7 further includes a plurality of pusher plates 73 fixedly connected to the circular plate 5 and / or the cutter disc 2 . The plurality of pusher plates 73 are circumferentially spaced relative to the rotation axis of the cutter disc 2 .

[0055] As the cutter disc 2 rotates, the long rod 71 and the short rod 72 can crush and push the material to move, and the push plate 73 pushes the material in the crushing process in the opening direction of the inlet 611 to discharge the crushed material.

[0056] The openings of the circular plate 5, i.e. the rotating ring plate 52, connected to the inner ends of the guide tubes 4 are all opened between the two pusher plates 73, and a plurality of long rods 71 ​​and a plurality of short rods 72 are arranged between the two pusher plates 73. The materials introduced into the crushing space by the guide tubes 4 are separated between the two pusher plates 73, and the possibility of the materials mixing in the crushing space to form a larger block structure is eliminated.

[0057] Each push plate 73 is provided with an escape hole 731 for the short rod 72 to pass through, so as to ensure that the push plate 73 can rotate smoothly on the circumference and realize the circumferential push of the material.

[0058] Each push plate 73 is spaced apart relative to the material guiding mechanism 6 so that the space between the two push plates 73 is connected. During the circumferential rotation of the push plates 73, a small amount of material in different spaces can flow, thereby increasing the possibility of crushing.

[0059] 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 tunneling device for underground excavation construction of a city rail station, comprising a shield machine body (1), a cutterhead (2) rotatably connected to the shield machine body (1), and a slurry discharge pipe (3) coaxially mounted on the shield machine body (1), wherein the cutterhead (2) is provided with a plurality of soil inlet openings (21), and characterized in that: A plurality of material guide pipes (4) whose outer ends are connected to the soil inlets (21) are fixedly connected to the back of the cutter disc (2). A circular plate (5) coaxial with the cutter disc (2) is fixedly connected to the inner end of each material guide pipe (4). The circular plate (5) is connected to the inner end of each material guide pipe (4). A material guide mechanism (6) fixedly connected to the shield machine body (1) is arranged on the inner side of the circular plate (5). The circular plate (5) and the material guide mechanism (6) are arranged at intervals to form a crushing space. A crushing mechanism (7) is arranged in the crushing space. The material guide mechanism (6) is provided with an inlet (611) connected to the crushing space and an outlet (621) connected to the slurry discharge pipe (3). The inlet (611) is spatially located above the outlet (621).

2. The tunneling device for underground excavation of urban rail stations according to claim 1 is characterized in that: The crushing mechanism (7) comprises a plurality of long rods (71) one end of which is fixedly connected to the back of the cutter head (2) and a plurality of short rods (72) one end of which is fixedly connected to the shield machine body (1), wherein each of the long rods (71) is located on a different circumference relative to each of the short rods (72) and is arranged in a staggered manner.

3. The tunneling device for underground excavation of urban rail stations according to claim 2 is characterized in that: The crushing mechanism (7) further comprises a plurality of pusher plates (73) fixedly connected to the circular plate (5) and / or the cutter disc (2), wherein the plurality of pusher plates (73) are arranged at circumferential intervals relative to the rotation axis of the cutter disc (2).

4. The tunneling device for underground excavation of urban rail stations according to claim 3 is characterized in that: Each opening of the circular plate (5) communicating with the inner end of each of the material guide tubes (4) is opened between two material pusher plates (73), and a plurality of the long rods (71) and a plurality of the short rods (72) are arranged between the two material pusher plates (73).

5. The tunneling device for underground excavation of urban rail stations according to claim 3 is characterized in that: Each of the push plates (73) is provided with an avoidance hole (731) for the short rod (72) to pass through.

6. The tunneling device for underground excavation of urban rail stations according to claim 3 is characterized in that: Each of the push plates (73) is arranged at a distance relative to the material guiding mechanism (6).

7. The tunneling device for underground excavation of urban rail stations according to any one of claims 1 to 6, characterized in that: The material guiding mechanism (6) comprises an outer ring plate (61) and an inner ring plate (62), both of which are fixedly connected at one end to the shield machine body (1); the outer ring plate (61) is arranged at intervals on the inner side of the inner ring plate (62), and the outer ring plate (61) is arranged coaxially with the circular plate (5); the inlet (611) is provided on the outer ring plate (61); the outlet (621) is provided between the outer ring plate (61) and the inner ring plate (62) and passes through the side wall of the slurry discharge pipe (3); and the other ends of the outer ring plate (61) and the inner ring plate (62) are abutted against the cutter head (2).

8. The tunneling device for underground excavation of urban rail stations according to claim 7 is characterized in that: The material guiding mechanism (6) further comprises a sealing plate (63) fixedly connected to the other end of the outer ring plate (61) and the inner ring plate (62), and the sealing plate (63) simultaneously seals the end of the slurry discharge pipe (3).

9. The tunneling device for underground excavation of urban rail stations according to claim 1, characterized in that: A plurality of the guide outlets (621) are provided at intervals, and each of the guide outlets (621) opens upwards and / or obliquely upwards.

10. The tunneling device for underground excavation of urban rail stations according to any one of claims 1 to 6, characterized in that: The slurry discharge pipe (3) is arranged at an angle, and one end connected to the material guiding mechanism (6) is an upwardly inclined end.

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