Soil discharging device suitable for vertical upward tunneling and jacking

Abstract

The utility model provides a dumping device suitable for vertical upward tunneling and jacking, which can flexibly control the dumping amount and the dumping speed and ensure the dumping stability. The soil discharging device comprises a soil bin, a top soil discharging pipe, a bottom soil discharging pipe, an upper spiral conveyor, a lower spiral conveyor, a first flexible pipe clamping valve and a second flexible pipe clamping valve. The soil bin is used for storing a soil body rotationally cut by the cutter head; the soil bin is coaxially connected with the first flexible pinch valve through a top soil discharge pipe; the first flexible pinch valve is coaxially connected with the second flexible pinch valve through the middle soil discharge pipe, and the second flexible pinch valve is coaxially connected with the bottom soil discharge pipe; the opening amount of the first flexible pinch valve and the opening amount of the second flexible pinch valve are adjustable. The upper spiral conveyor is coaxially arranged in the soil bin and the top soil discharging pipe; the lower spiral conveyor is coaxially arranged in the bottom soil discharging pipe; and a transmission shaft of the lower spiral conveyor is coaxially connected with a transmission shaft of the upper spiral conveyor through a soil discharge pipe transmission shaft.

Description

Technical Field

[0001] The utility model relates to a soil discharge device, in particular to a soil discharge device suitable for vertical upward excavation and jacking, belonging to the technical field of building construction. Background Art

[0002] Vertical shafts play an important role in tunnel construction or water conservancy project construction. For example, in tunnel construction, vertical shafts can be used as ventilation holes to introduce fresh air into the tunnel and remove harmful gases, ensuring the safety of workers and improving work efficiency. In water conservancy project construction, vertical shafts can be used as water delivery channels or drainage channels to solve the problem of being unable to dig channels on the surface and reduce evaporation and leakage of water during transportation.

[0003] The purpose of digging vertical shafts is to provide safe and convenient passages for workers, promote drainage and ventilation, and meet the needs of special projects. The construction of these shafts not only improves work efficiency, but also ensures the safety and quality of the project. However, the vertical excavation of pipe shafts involves complex transmission systems, sealing structures, soil discharge methods, soil pressure control and other issues.

[0004] Compared with horizontal excavation, when vertical excavation and jacking are adopted from bottom to top, the gravity direction of the soil is the same as the direction of soil discharge, which will cause difficulties in controlling the soil pressure at the top and the stability of soil discharge. Therefore, it is necessary to design a soil discharge device that can be suitable for the vertical upward excavation system. Utility Model Content

[0005] In view of this, the utility model provides a soil discharge device suitable for vertical upward excavation and jacking, which can flexibly control the soil discharge amount and soil discharge rate to ensure soil discharge stability.

[0006] The technical solution of the utility model is: a soil discharge device suitable for vertical upward excavation and jacking, comprising: a soil bin, a top soil discharge pipe, a bottom soil discharge pipe, an upper screw conveyor, a lower screw conveyor, a first flexible pinch valve and a second flexible pinch valve;

[0007] The soil bin is used to store the soil cut by the rotation of the cutter head;

[0008] The soil bin is coaxially connected to the first flexible pinch valve via a top soil discharge pipe;

[0009] The first flexible pinch valve is coaxially connected to the second flexible pinch valve through the middle soil discharge pipe, and the second flexible pinch valve is coaxially connected to the bottom soil discharge pipe; the opening amount of the first flexible pinch valve and the second flexible pinch valve is adjustable;

[0010] The upper screw conveyor is coaxially arranged in the soil bin and the top soil discharge pipe;

[0011] The lower screw conveyor is coaxially arranged in the bottom soil discharge pipe;

[0012] The transmission shaft of the lower screw conveyor is coaxially connected with the transmission shaft of the upper screw conveyor through the soil discharge pipe transmission shaft.

[0013] As a preferred embodiment of the present invention, the first flexible pinch valve is a double-layer structure, including an outer steel sleeve and an inner rubber ring; the steel sleeve and the rubber ring are coaxially arranged with a gap therebetween to form an annular pressurized space;

[0014] The first flexible pinch valve steel sleeve is provided with connecting flanges as external connection interfaces at both axial ends thereof;

[0015] The second flexible pinch valve has the same structure as the first flexible pinch valve.

[0016] As a preferred embodiment of the present invention, it also includes a pressure control unit;

[0017] The annular pressurized space of the first flexible pinch valve is connected to a pressure control unit via a first pressure control pipeline;

[0018] The annular pressurized space of the second flexible pinch valve is connected to a pressure control unit via a second pressure control pipeline.

[0019] As a preferred embodiment of the present invention, a soil pressure gauge is installed in the soil bin to monitor the soil pressure change of the soil bin during the operation in real time, and the soil pressure gauge is electrically connected to the pressure control unit.

[0020] As a preferred embodiment of the utility model, the bottom soil discharge pipe is formed by a plurality of soil discharge pipe sections being axially sealed and butted in sequence.

[0021] As a preferred embodiment of the utility model, the diameters of the soil discharge pipe drive shaft and the lower screw conveyor drive shaft are smaller than the diameter of the upper screw conveyor drive shaft.

[0022] As a preferred embodiment of the utility model, a sleeve is coaxially sleeved on the outside of the soil discharge pipe transmission shaft, and the sleeve does not rotate along with the rotation of the soil discharge pipe transmission shaft.

[0023] As a preferred embodiment of the present invention, the cutter disc is located above the soil bin and is spaced apart from the upper end surface of the soil bin.

[0024] As a preferred embodiment of the present invention, the transmission shaft of the upper screw conveyor extends out of the soil bin and is connected to the cutter disc.

[0025] Beneficial effects:

[0026] (1) The soil discharge device of the utility model is provided with two flexible pinch valves with adjustable opening amounts. By changing the opening amounts of the flexible pinch valves, the soil dischargeable area in the flexible pinch valves can be changed, thereby enabling the soil discharge device to flexibly control the soil discharge amount and soil discharge rate according to different soil bodies, thereby ensuring the stability of soil pressure during the vertical upward excavation and jacking process, solving the soil discharge and soil pressure control problems during the bottom-up excavation and jacking process, and ensuring the safety and efficiency of the vertical upward excavation and jacking operation.

[0027] (2) The two flexible pinch valves in the soil discharge device of the utility model use pressurization to change the opening amount, and the control method is simple.

[0028] (3) In the soil discharge device of the present invention, a soil pressure gauge is installed in the soil bin to monitor the soil pressure changes in the soil bin during the operation in real time and send the results to the pressure control unit. The pressure control unit can control the opening amounts of the two clamp valves according to the soil pressure changes in the soil bin and the required soil discharge rate, thereby effectively controlling the soil discharge pressure and soil discharge rate.

[0029] (4) In the soil discharge device of the present invention, the cutter disc, the transmission shaft of the upper screw conveyor and the transmission shaft of the lower screw conveyor are coaxially connected, thereby enabling the upper and lower screw conveyors and the cutter disc to rotate simultaneously through a set of power units.

[0030] (5) In the soil discharge device of the utility model, the bottom soil discharge pipe adopts a segmented splicing type, and the soil discharge pipe sections can be continuously increased according to the vertical jacking excavation height. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional diagram of the earth discharge device suitable for vertical upward excavation and jacking of the utility model;

[0032] Figure 2 It is a cross-sectional view of the earth discharge device suitable for vertical upward excavation and jacking of the utility model;

[0033] Figure 3 It is a structural schematic diagram of the bottom soil discharge pipe;

[0034] Figure 4 is a structural schematic diagram of a flexible pinch valve;

[0035] Figure 5 It is the structural schematic diagram of the lower screw conveyor;

[0036] Among them: 1-cutter disc, 2-soil bin, 3-top soil discharge pipe, 4-upper screw conveyor, 5-top connecting flange, 6-first flexible clamping valve, 7-soil discharge pipe drive shaft, 8-middle soil discharge pipe, 9-lower screw conveyor, 10-pipe section, 11-first pressure control pipeline, 12-second pressure control pipeline, 13-pressure control unit, 14-second flexible clamping valve, 15-control pipeline connection port. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0038] This embodiment provides a soil discharge device suitable for vertical upward excavation and jacking, which can flexibly control the soil discharge volume and soil discharge rate according to different soil bodies, thereby ensuring the stability of soil discharge during vertical upward excavation and jacking construction operations, and has strong practicality.

[0039] like Figure 1 and Figure 2 As shown, the soil discharge device includes: a soil bin 2, a top soil discharge pipe 3, a bottom soil discharge pipe, an upper screw conveyor 4, a lower screw conveyor 9, a first flexible pinch valve 6 and a second flexible pinch valve 14.

[0040] The soil bin 2 arranged at the top of the soil discharge device is used to store the soil cut by the cutter head 1 of the tunnel boring machine. The cutter head 1 is located above the soil bin 2 and is spaced from the upper end surface of the soil bin 2 to ensure that the cutter head 1 does not collide with the soil bin 2 when rotating. As an example, the soil bin 2 is a funnel-shaped structure with a large top and a small bottom. The lower end of the soil bin 2 is coaxially connected to the top soil discharge pipe 3. The lower end of the top soil discharge pipe 3 is fixed to the top connecting flange 5.

[0041] The upper screw conveyor 4 is coaxially arranged inside the soil bin 2 and the top soil discharge pipe 3. The soil cut by the cutter disc 1 is discharged downward by the rotation of the upper screw conveyor 4. The upper screw conveyor 4 includes a transmission shaft that passes through the soil bin 2 and the top soil discharge pipe 3 and an impeller welded on the transmission shaft. The soil cut by the cutter disc 1 is discharged downward by the rotation of the impeller. The transmission shaft of the upper screw conveyor 4 extends out of the soil bin 2 and is connected to the cutter disc 1.

[0042] The lower end of the top soil discharge pipe 3 is coaxially connected to the first flexible pinch valve 6 through the top connecting flange 5, the first flexible pinch valve 6 is coaxially connected to the second flexible pinch valve 14 through the middle soil discharge pipe 8, and the second flexible pinch valve 14 is coaxially connected to the bottom soil discharge pipe.

[0043] The bottom soil discharge pipe is coaxially provided with Figure 5The lower screw conveyor 9 shown in the figure has a transmission shaft coaxially connected with the transmission shaft of the upper screw conveyor 4 through the soil discharge pipe transmission shaft 7 (i.e., the soil discharge pipe transmission shaft 7 is located in the first flexible clamping valve 6, the middle soil discharge pipe 8 and the second flexible clamping valve 14, the upper end is coaxially connected with the transmission shaft of the upper screw conveyor 4 through the soil discharge pipe transmission shaft 7, and the lower end is coaxially connected with the transmission shaft of the lower screw conveyor 9). The transmission shaft of the lower screw conveyor 9 is connected to the power unit, thereby realizing the simultaneous rotation of the upper and lower screw conveyors and the cutter disc through a set of power units.

[0044] As an example, a sleeve is coaxially sleeved on the outside of the soil discharge pipe transmission shaft 7, and the sleeve does not rotate with the rotation of the soil discharge pipe transmission shaft 7, so that when the flexible clamp valve is fully closed, it does not affect the rotation of the soil discharge pipe transmission shaft 7. For example: a sleeve is coaxially sleeved on the outside of the soil discharge pipe transmission shaft 7, and the upper and lower ends of the sleeve are supported on the soil discharge pipe transmission shaft 7 through bearings, so that the sleeve does not rotate with the rotation of the soil discharge pipe transmission shaft 7.

[0045] As an example, the diameters of the soil discharge pipe drive shaft 7 and the lower screw conveyor 9 drive shaft are smaller than the diameter of the upper screw conveyor 4 drive shaft. The purpose of this design is that the drive shaft of the upper screw conveyor 4 also needs to drive the top cutter head, which requires a large torque, so a thicker shaft is used; while the soil discharge pipe drive shaft 7 needs to pass through two flexible pinch valves, so a thinner shaft is used.

[0046] The first flexible pinch valve 6 and the second flexible pinch valve 14 are both pinch valves with adjustable opening amounts. In this example, the opening amount control range of the first flexible pinch valve 6 and the second flexible pinch valve 14 is 0 to 100%.

[0047] As an example, the first flexible pinch valve 6 and the second flexible pinch valve 14 have the same structure. Taking the first flexible pinch valve 6 as an example: Figure 4 As shown, the first flexible pinch valve 6 is a double-layer structure, including an outer steel casing and an inner rubber ring; the steel casing and the rubber ring are coaxially arranged, and there is a gap between the two to form an annular pressurized space; the opening amount of the pinch valve is changed by pressurizing the annular pressurized space, thereby adjusting the soil discharge rate. The axial ends of the steel casing of the first flexible pinch valve 6 are respectively provided with connection flanges as external connection interfaces.

[0048] As an example, the pressure control unit 13 is respectively connected to the first flexible pinch valve 6 and the second flexible pinch valve 14 to control the opening amount of the first flexible pinch valve 6 and the second flexible pinch valve 14. Take the first flexible pinch valve 6 as an example: the surface of the steel casing of the first flexible pinch valve 6 is provided with a control pipeline connection port 15 connected to the annular pressurized space, and the control pipeline connection port 15 is connected to the pressure control unit 13 through the first pressure control pipeline 11, so that the pressure control unit 13 pressurizes the annular pressurized space through the first pressure control pipeline 11 to change the opening amount of the pinch valve, thereby adjusting the soil discharge rate. As an example, a control pipeline connection port 15 is respectively provided on two opposite sides of the outer surface of the steel casing, and the two control pipeline connection ports 15 are respectively connected to the pressure control unit 13.

[0049] like Figure 2 As shown, the first flexible pinch valve 6 is connected to the pressure control unit 13 through the first pressure control pipeline 11, and the second flexible pinch valve 14 is connected to the pressure control unit 13 through the second pressure control pipeline 12; thus, the pressure control unit 13 can control the opening amounts of the two flexible pinch valves respectively, that is, the upper and lower flexible pinch valves can be controlled separately, and the regulating range of the opening amounts is 1-100%, which can realize the simultaneous closure of the two flexible pinch valves, the simultaneous opening of the two flexible pinch valves, the complete closure of one flexible pinch valve and the complete opening of the other flexible pinch valve, and the opening amounts of the two flexible pinch valves respectively being different percentages, so as to meet the requirements of different soil discharge rates.

[0050] A soil pressure gauge is installed in the soil bin 2 to monitor the soil pressure change in the soil bin 2 during operation; the soil pressure gauge is electrically connected to the pressure control unit 13, and the monitored soil pressure in the soil bin 2 is sent to the pressure control unit 13 in real time. In actual use, the pressure control unit 13 controls the opening amount of the two pinch valves according to the soil pressure change in the soil bin 2 and the required soil discharge rate.

[0051] The bottom soil discharge pipe consists of multiple Figure 4 The drainage pipe sections 10 shown are formed by connecting the axial parts in sequence; the axial ends of the drainage pipe sections 10 are provided with flanges, so that the adjacent drainage pipe sections 10 are connected by flanges and high-strength screws, and rubber sealing rings are installed between the flanges of the adjacent drainage pipe sections 10 to ensure the airtightness of the bottom drainage pipe. The bottom drainage pipe adopts segmented splicing, and the drainage pipe sections 10 can be continuously added according to the jacking excavation height.

[0052] The soil discharge device is designed with a vertical double-pass flexible pinch valve to ensure the stability of soil discharge during construction operations, that is, the soil is stably transported downward by controlling the two flexible pinch valves, thereby ensuring the stability of vertical soil discharge.

[0053] Therefore, when vertical jacking excavation is carried out, the soil cut by the cutter head 1 enters the soil bin 2, and the upper screw conveyor 4 discharges the soil downward; two flexible clamping valves are provided in the middle. During the soil discharge process, the pressure control unit 13 controls the opening and contraction of the rubber rings inside the two clamping valves according to the monitored soil pressure in the soil bin 2 and the set soil discharge rate, thereby changing the soil discharge area of ​​the clamping valve. Through the coordinated operation of the upper and lower flexible clamping valves, the soil discharge speed is effectively controlled to ensure the stability of the soil pressure during the vertical excavation jacking process and the discharge stability during the construction process. The soil discharge device can improve some of the shortcomings of traditional earth pressure balance shields and slurry balance tunnel boring machines, and realize efficient construction of vertical excavation from bottom to top in a narrow space.

[0054] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soil discharge device suitable for vertical upward excavation and lifting, characterized by: include: A soil bin (2), a top soil discharge pipe (3), a bottom soil discharge pipe, an upper screw conveyor (4), a lower screw conveyor (9), a first flexible pinch valve (6) and a second flexible pinch valve (14); The soil bin (2) is used to store soil cut by the rotation of the cutter head (1); The soil bin (2) is coaxially connected to the first flexible pinch valve (6) via a top soil discharge pipe (3); The first flexible pinch tube valve (6) is coaxially connected to the second flexible pinch tube valve (14) via the middle soil discharge pipe (8), and the second flexible pinch tube valve (14) is coaxially connected to the bottom soil discharge pipe; the opening amounts of the first flexible pinch tube valve (6) and the second flexible pinch tube valve (14) are adjustable; The upper screw conveyor (4) is coaxially arranged in the soil bin (2) and the top soil discharge pipe (3); The lower screw conveyor (9) is coaxially arranged in the bottom soil discharge pipe; The transmission shaft of the lower screw conveyor (9) is coaxially connected to the transmission shaft of the upper screw conveyor (4) via a soil discharge pipe transmission shaft (7).

2. The soil discharge device suitable for vertical upward excavation and lifting according to claim 1, characterized in that: The first flexible pinch valve (6) is a double-layer structure, comprising an outer steel casing and an inner rubber ring; the steel casing and the rubber ring are coaxially arranged with a gap therebetween, forming an annular pressurized space; The first flexible pinch valve (6) is provided with connecting flanges as external connection interfaces at both axial ends of the steel casing; The second flexible pinch valve (14) has the same structure as the first flexible pinch valve (6).

3. The earth discharge device suitable for vertical upward excavation and lifting as claimed in claim 2, characterized in that: Also included is a pressure control unit (13); The annular pressurized space of the first flexible pinch valve (6) is connected to a pressure control unit (13) via a first pressure control pipeline (11); The annular pressurized space of the second flexible pinch valve (14) is connected to the pressure control unit (13) via a second pressure control pipeline (12).

4. The earth discharge device suitable for vertical upward excavation and lifting as claimed in claim 3, characterized in that: A soil pressure gauge is installed in the soil bin (2) to monitor the soil pressure changes in the soil bin (2) in real time during the operation process, and the soil pressure gauge is electrically connected to the pressure control unit (13).

5. The earth discharge device suitable for vertical upward excavation and lifting according to any one of claims 1 to 4, characterized in that: The bottom soil discharge pipe is formed by a plurality of soil discharge pipe sections being axially sealed and butted in sequence.

6. The earth discharge device suitable for vertical upward excavation and lifting according to any one of claims 1 to 4, characterized in that: The diameters of the soil discharge pipe drive shaft (7) and the drive shaft of the lower screw conveyor (9) are smaller than the diameter of the drive shaft of the upper screw conveyor (4).

7. The earth discharge device suitable for vertical upward excavation and lifting according to any one of claims 1 to 4, characterized in that: A sleeve is coaxially sleeved on the outside of the soil discharge pipe transmission shaft (7), and the sleeve does not rotate along with the soil discharge pipe transmission shaft (7).

8. The earth discharge device suitable for vertical upward excavation and lifting according to any one of claims 1 to 4, characterized in that: The cutter disc (1) is located above the soil bin (2) and is spaced apart from the upper end surface of the soil bin (2).

9. The earth discharge device suitable for vertical upward excavation and lifting as claimed in claim 8, characterized in that: The transmission shaft of the upper screw conveyor (4) extends out of the soil bin (2) and is connected to the cutter disc (1).

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