Scouring device and method for preventing stagnant discharge of slurry shield

Abstract

The invention relates to the technical field of shield construction, and discloses a scouring device and method for preventing stagnant discharge of a slurry-preventing shield, and the scouring device comprises a partition plate, a high-pressure plunger pump, a pipeline shunting assembly, a slurry outlet pipe and a scouring pipe; the partition plate is installed between a muddy water bin and an air cushion bin of the shield tunneling machine, and the bottom of the partition plate is fixedly connected with an anterior shield shell of the shield tunneling machine. A slurry inlet of the high-pressure plunger pump is communicated with a slurry inlet pipe of a muddy water system in the shield tunneling machine; the pipeline shunting assembly is mounted at a slurry outlet of the high-pressure plunger pump; the slurry outlet pipe is mounted on the partition plate, the slurry outlet pipe is mounted between the muddy water bin and the slurry discharging system, and a plurality of slurry outlet holes are symmetrically formed in the slurry outlet pipe; one end of each washing pipe is fixedly connected and communicated with the pipeline shunting assembly through the flow pressure adjusting assembly; a plug is mounted at one end of the flushing pipe; wherein a plurality of flushing holes are formed in the flushing pipe. The problem of stagnant discharge of the muck can be effectively solved, the shield tunneling efficiency is improved, the construction risk is reduced, and the tunnel construction quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction, in particular to a scouring device and method for preventing mud and water shield from stagnation and drainage. Background Art

[0002] During slurry shield construction, drainage stagnation is one of the main factors affecting shield tunneling progress. Influenced by factors such as hydrogeology, slurry density, tunneling parameters, and operating techniques, in complex strata such as sandy and gravel formations, strata prone to mud cake formation, fault fracture zones, strata with developed joints and fissures, strata with uneven hardness, and isolated boulders, the excavated excavated soil may be delayed or delayed due to particle characteristics (specific gravity, size, and shape). Slurry shield drainage stagnation not only affects construction progress and quality but also increases construction risks and costs. Effective preventive and treatment measures must be implemented during shield construction to address drainage stagnation.

[0003] Existing technologies struggle to effectively address slurry shield delays when they are severe, due to factors such as slurry pressure and flushing angle. These delays significantly slow construction progress and increase costs. They can also cause pressure imbalances in the slurry bin due to soil accumulation, leading to shield machine displacement and potentially even tunnel collapse, threatening the lives of construction workers.

[0004] Therefore, a scouring device and method for preventing mud and water shield from stagnation are proposed. Summary of the Invention

[0005] The object of the present invention is to provide a scouring device and method for preventing mud and water shield from stagnation, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a scouring device for preventing mud and water shield from stagnation and drainage, comprising: A partition, the partition being installed between the mud and water compartment and the air cushion compartment of the shield machine, and the bottom of the partition being fixedly connected to the front shield shell of the shield machine; A high-pressure plunger pump, the high-pressure plunger pump being installed on the trolley of the shield machine, and the slurry inlet of the high-pressure plunger pump being connected to the slurry inlet pipe of the slurry water system in the shield machine; A pipeline diversion component, the pipeline diversion component is installed at the slurry outlet of the high-pressure plunger pump; A slurry discharge pipe is installed on the partition plate, and is installed between the mud and water bin and the slurry discharge system. The slurry discharge pipe is provided with a plurality of symmetrically arranged slurry discharge holes; A flushing pipe, wherein a plurality of the flushing pipes are provided, and the plurality of the flushing pipes are symmetrically arranged on both sides of the slurry discharge pipe, the flushing pipes are located in the mud and water bin, and one end of the plurality of the flushing pipes is fixedly connected and communicated with the pipeline diversion assembly through a flow pressure regulating assembly respectively; a plug is installed at one end of the flushing pipe; Wherein, a plurality of flushing holes are opened on the flushing pipe, and the angle between the spraying direction of the flushing holes and the bottom wall of the mud and water bin is 30° to 45°.

[0007] According to the anti-mud and water shield anti-delay flushing device provided by the present invention, a plurality of inner thread seats are reserved for installation on the partition plate, and the inner thread seats are used to connect the flushing pipe and the flow pressure regulating component.

[0008] According to a scouring device for preventing mud and water shield from stagnation provided by the present invention, the flow pressure regulating assembly includes a ball valve, one end of which is installed on the inner thread seat, and the other end is connected to the pipeline diversion assembly through a connecting pipe.

[0009] According to a flushing device for preventing mud and water shield from stagnation provided by the present invention, the pipeline diversion assembly includes a high-pressure diverter, one end of the high-pressure diverter is installed at the slurry outlet of the high-pressure plunger pump through a high-pressure hose, and the other end of the high-pressure diverter is respectively fixedly connected and communicated with several of the connecting pipes.

[0010] According to the present invention, a scouring device for preventing mud and water shield from stagnation is provided, wherein the scouring pipe is made of DN50 seamless steel pipe, the spacing between two adjacent scouring holes is 200 mm, and the diameter of the scouring hole is 20 mm.

[0011] According to the anti-mud and water shield anti-delay flushing device provided by the present invention, the plurality of slurry outlet holes are symmetrically arranged along the axis of the slurry outlet pipe, and the distance between two adjacent slurry outlet holes is 200 mm.

[0012] According to the anti-mud and water shield anti-delay flushing device provided by the present invention, the high-pressure diverter adopts a seamless high-pressure pipe, and a pipeline joint is welded on the seamless high-pressure pipe.

[0013] According to the anti-mud and water shield anti-delay flushing device provided by the present invention, the distance between the slurry outlet hole close to the partition and the partition is 100 mm.

[0014] The present invention also provides a method for flushing a mud-water shield and preventing stagnation, comprising the following steps: Step 1: Install a high-pressure plunger pump. The slurry inlet of the high-pressure plunger pump is connected to the slurry inlet pipe, and the slurry outlet is connected to several flow and pressure regulating components through a pipeline diversion component; Step 2: Use a high-pressure plunger pump to pressurize the mud in the slurry inlet pipe of the mud-water system into high-pressure mud, and pump the high-pressure mud into the pipeline diversion component, and use the pipeline diversion component to pass the high-pressure mud into several flushing pipes respectively; Step 3: Use the flow and pressure regulating assembly to adjust the high-pressure mud flushing flow and flushing pressure in each flushing pipe; Step 4: The high-pressure mud in each flushing pipe is sprayed out through a number of flushing holes to flush out the debris accumulated at the bottom of the mud and water tank. The flushed debris is discharged through the mud discharge system; Step 5: The washed out debris enters the slurry discharge pipe through the slurry discharge hole; Step 6: Use the mud discharge system to discharge the debris in the slurry pipe.

[0015] The present invention discloses the following technical effects: The slurry is then pumped out of the slurry pipe and into the slurry distribution system to ensure that the slurry is flushed out of the slurry distribution system and the slurry distribution system is cleared. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the installation of the flushing pipe and the partition in the present invention; Figure 2 It is a schematic diagram of the flushing principle of the present invention; Figure 3 Schematic diagram of the layout of the flushing pipe in the present invention; Figure 4 Schematic diagram of the structure of the scouring hole in the present invention.

[0018] Among them, 1. Mud; 2. High-pressure plunger pump; 3. Partition; 4. Front shield shell; 5. Connecting pipe; 6. Ball valve; 7. Male thread short section; 8. Female thread seat; 9. Flushing pipe; 10. Blocking; 11. Mud and water tank; 12. Air cushion tank; 13. Slurry outlet hole; 14. Flushing hole; 15. Slurry inlet pipe; 16. High-pressure hose; 17. High-pressure diverter. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-4 The present invention provides a scouring device for preventing mud and water shield from stagnation and drainage, comprising: The partition 3 is installed between the mud and water chamber 11 and the air cushion chamber 12 of the shield machine, and the bottom of the partition 3 is fixedly connected to the front shield shell 4 of the shield machine; High-pressure plunger pump 2, which is installed on the trolley of the shield machine, and the slurry inlet of the high-pressure plunger pump 2 is connected to the slurry inlet pipe 15 of the slurry water system in the shield machine; A pipeline diversion component is installed at the slurry outlet of the high-pressure plunger pump 2; The slurry discharge pipe is installed on the partition 3 and is installed between the mud and water tank 11 and the mud discharge system. The slurry discharge pipe is provided with a plurality of symmetrically arranged slurry discharge holes 13; Flushing pipes 9 are provided in plurality, and a plurality of flushing pipes 9 are provided on the partition 3; the plurality of flushing pipes 9 are symmetrically arranged on both sides of the slurry discharge pipe, and the flushing pipes 9 are located in the mud and water bin 11, and one end of the plurality of flushing pipes 9 is fixedly connected and communicated with the pipeline diversion assembly through the flow pressure regulating assembly; a plug 10 is installed at one end of the flushing pipe 9; the plug 10 is made of a 10 mm thick steel plate; Among them, a plurality of scouring holes 14 are opened on the scouring pipe 9. The angle between the spraying direction of the scouring hole 14 and the bottom wall of the mud and water bin 11 is 30° to 45°. High-pressure mud is sprayed through the scouring hole 14 to directionally strip the bottom soil of the mud and water bin 11 and scour the coverage rate. With such arrangement, in the present invention, the mud 1 in the slurry inlet pipe 15 of the mud and water system is pressurized into high-pressure mud through the high-pressure plunger pump 2, and the high-pressure mud is pumped into the pipeline diversion component, and the pipeline diversion component is used to respectively pass the high-pressure mud into several flushing pipes 9, and the slag accumulated at the bottom of the mud and water bin 11 is flushed through several flushing holes 14. The flushed slag is discharged by entering the mud discharge system, thereby achieving all-round flushing of the mud and water bin bottom, and more thoroughly and effectively solving the slag stagnation problem of mud and water shield and earth pressure mud and water dual-mode shield, achieving stable slag discharge to maintain the pressure balance of the mud and water bin, reducing the risk of shield machine failure and tunnel collapse, ensuring the safety of construction personnel, reducing construction risks, and improving tunnel construction quality. At the same time, it effectively avoids the suspension of shield excavation due to slag accumulation, so that construction can be carried out continuously and efficiently, improving shield excavation efficiency, and significantly shortening the construction period, which is of great significance to promoting the development of underground engineering construction.

[0022] Further optimizing the solution, a plurality of inner thread seats 8 are reserved for installation on the partition 3, and the inner thread seats 8 are used to connect the flushing pipe 9 and the flow pressure regulating component; The inner thread seat 8 is a DN50 inner thread seat, which is used to ensure the stable installation and reliable connection of the entire flushing pipeline system and ensure the stable transmission of mud in the system.

[0023] Further optimizing the solution, the flow pressure regulating assembly includes a ball valve 6, one end of the ball valve 6 is mounted on the inner thread seat 8, and the other end is connected to the pipeline diversion assembly through the connecting pipe 5; By adjusting the opening of the ball valve 6, the flushing flow (50-150L / min) and flushing pressure (1.8-2.2MPa) of the single-channel flushing pipe 9 are controlled. The flushing force can be flexibly adjusted according to the actual accumulation of debris during construction to achieve precise flushing.

[0024] To further optimize the solution, the pipeline diversion assembly includes a high-pressure diverter 17, one end of the high-pressure diverter 17 is installed at the slurry outlet of the high-pressure plunger pump 2 through a high-pressure hose 16, and the other end of the high-pressure diverter 17 is fixedly connected and communicated with several connecting pipes 5 respectively; the high-pressure mud is distributed to each flushing pipe 9 through the high-pressure diverter 17.

[0025] To further optimize the solution, the flushing pipe 9 is made of DN50 seamless steel pipe, the distance between two adjacent flushing holes 14 is 200 mm, and the diameter of the flushing hole 14 is 20 mm.

[0026] To further optimize the solution, several slurry discharge holes 13 are symmetrically arranged along the axis of the slurry discharge pipe, and the spacing between two adjacent slurry discharge holes 13 is 200 mm; the actual spacing size is adjusted according to the actual length of the slurry discharge pipe; the slurry discharge holes 13 are arranged in double rows, and the double rows of cross-shaped slurry discharge holes 13 are arranged in a cross-symmetrical manner. Through the double rows of cross-shaped slurry discharge holes 13, the Venturi effect is used to form a spiral flow state, which can efficiently discharge the debris and improve the slurry discharge efficiency.

[0027] To further optimize the solution, the high-pressure diverter 17 adopts a seamless high-pressure pipe, on which a pipe joint is welded.

[0028] According to a further optimization scheme, the distance between the slurry outlet 13 close to the partition 3 and the partition 3 is 100 mm.

[0029] The present invention also provides a method for flushing a mud-water shield and preventing stagnation, comprising the following steps: Step 1: Install the high-pressure plunger pump 2. The slurry inlet of the high-pressure plunger pump 2 is connected to the slurry inlet pipe 15, and the slurry outlet is connected to several flow and pressure regulating components through a pipeline diversion component; Step 2: Use the high-pressure plunger pump 2 to pressurize the mud 1 in the mud inlet pipe 15 of the mud-water system into high-pressure mud, and pump the high-pressure mud into the pipeline diversion component, and use the pipeline diversion component to pass the high-pressure mud into several flushing pipes 9 respectively; Step 3: Use the flow and pressure regulating assembly to adjust the high-pressure mud flushing flow and flushing pressure in each flushing pipe 9; Step 4: The high-pressure mud in each flushing pipe 9 is ejected through the flushing holes 14 to flush the debris accumulated at the bottom of the mud and water tank 11. The flushed debris is discharged through the mud discharge system; Step 5: The washed out debris enters the slurry outlet pipe through the slurry outlet hole 13; Step 6: Use the mud discharge system to discharge the debris in the slurry pipe.

[0030] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flushing device for preventing mud and water shield from stagnation, characterized in that: include: A partition (3), the partition (3) being installed between the mud and water bin (11) and the air cushion bin (12) of the shield machine, and the bottom of the partition (3) being fixedly connected to the front shield shell (4) of the shield machine; A high-pressure plunger pump (2), the high-pressure plunger pump (2) being mounted on a trolley of the shield machine, the slurry inlet of the high-pressure plunger pump (2) being in communication with a slurry inlet pipe (15) of a slurry water system in the shield machine; A pipeline diversion component, the pipeline diversion component is installed at the slurry outlet of the high-pressure plunger pump (2); A slurry discharge pipe, the slurry discharge pipe is installed on the partition (3), the slurry discharge pipe is installed between the mud and water bin (11) and the slurry discharge system, and the slurry discharge pipe is provided with a plurality of symmetrically arranged slurry discharge holes (13); A flushing pipe (9), wherein a plurality of the flushing pipes (9) are provided, and the plurality of the flushing pipes (9) are on the partition (3); the plurality of the flushing pipes (9) are symmetrically arranged on both sides of the slurry discharge pipe, the flushing pipes (9) are located in the mud and water bin (11), and one end of the plurality of the flushing pipes (9) is fixedly connected and communicated with the pipeline diversion assembly through a flow pressure regulating assembly; a plug (10) is installed at one end of the flushing pipe (9); The flushing pipe (9) is provided with a plurality of flushing holes (14), and the angle between the spraying direction of the flushing holes (14) and the bottom wall of the mud and water bin (11) is 30° to 45°.

2. The anti-mud and water shield anti-stagnation flushing device according to claim 1 is characterized in that: A plurality of inner thread seats (8) are reserved for installation on the partition (3), and the inner thread seats (8) are used to connect the flushing pipe (9) and the flow pressure regulating assembly.

3. The anti-mud and water shield anti-stagnation flushing device according to claim 2 is characterized by: The flow pressure regulating assembly comprises a ball valve (6), one end of which is mounted on the inner thread seat (8), and the other end of which is connected to the pipeline diversion assembly via a connecting pipe (5).

4. The anti-mud and water shield anti-drainage flushing device according to claim 3 is characterized by: The pipeline diverter assembly includes a high-pressure diverter (17), one end of the high-pressure diverter (17) is installed at the slurry outlet of the high-pressure plunger pump (2) through a high-pressure hose (16), and the other end of the high-pressure diverter (17) is fixedly connected to and communicated with a plurality of the connecting pipes (5).

5. The anti-mud and water shield anti-stagnation flushing device according to claim 1 is characterized in that: The flushing pipe (9) is made of a DN50 seamless steel pipe, the distance between two adjacent flushing holes (14) is 200 mm, and the diameter of the flushing hole (14) is 20 mm.

6. The anti-mud and water shield anti-stagnation flushing device according to claim 1 is characterized by: The plurality of slurry outlet holes (13) are symmetrically arranged along the axis of the slurry outlet pipe, and the distance between two adjacent slurry outlet holes (13) is 200 mm.

7. The anti-mud and water shield anti-stagnation flushing device according to claim 4 is characterized in that: The high-pressure diverter (17) adopts a seamless high-pressure pipe, and a pipe joint is welded on the seamless high-pressure pipe.

8. The anti-mud and water shield anti-stagnation flushing device according to claim 1 is characterized by: The distance between the pulp outlet hole (13) close to the partition (3) and the partition (3) is 100 mm.

9. A method for flushing a mud-water shield to prevent stagnation, based on the flushing device for flushing a mud-water shield to prevent stagnation according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Install a high-pressure plunger pump (2), wherein the slurry inlet of the high-pressure plunger pump (2) is connected to the slurry inlet pipe (15), and the slurry outlet is connected to a plurality of flow and pressure regulating components through a pipeline diversion component; Step 2: using a high-pressure plunger pump (2) to pressurize the mud (1) in the mud inlet pipe (15) of the mud-water system into high-pressure mud, and pumping the high-pressure mud into the pipeline diversion component, and using the pipeline diversion component to pass the high-pressure mud into a plurality of flushing pipes (9); Step 3: Using the flow and pressure regulating assembly to regulate the high-pressure mud flushing flow and flushing pressure in each flushing pipe (9); Step 4: The high-pressure mud in each flushing pipe (9) is ejected through a plurality of flushing holes (14) to flush the debris accumulated at the bottom of the mud and water tank (11). The flushed debris is discharged through the mud discharge system; Step 5: The flushed debris enters the slurry outlet pipe through the slurry outlet hole (13); Step 6: Use the mud discharge system to discharge the debris in the slurry pipe.

Images