Water adding system optimization and transformation device for shield soil bin

Abstract

The utility model relates to a water adding system optimization and transformation device for a shield soil bin, which comprises a shield cutter head, a shell and a hydraulic jacking assembly, the shield cutter head is arranged at the end part of the shell, the hydraulic jacking assembly is arranged in the shell and is used for providing jacking force for the shield cutter head, the soil bin is formed on one side, facing the shell, of the shield cutter head, and the shield cutter head is arranged in the shell. A spiral conveying pipe is arranged at the lower end of the soil bin; a plurality of circles of water inlet pipes are arranged in the soil bin, extend into the soil bin from the shell and are annularly arranged at intervals along the same axis, and liquid outlets of the water inlet pipes face downwards; a plurality of material crushing plates are arranged on the back face of the shield cutter head, the shield cutter head rotates to drive the material crushing plates installed on the back face of the shield cutter head to move, so that soil in the soil bin is scraped, the multiple circles of material crushing plates move to effectively scatter the area where a mud cake is formed in the soil bin, then high-pressure water is sprayed into the soil bin through a water inlet pipe, the fluidity of soil slurry is enhanced, and the soil in the soil bin is crushed. Therefore, the soil slurry can be quickly discharged from the spiral conveying pipe.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling equipment technology, specifically relating to an optimization and modification device for the water supply system of the shield tunnel soil chamber. Background Technology

[0002] With the continuous development of society, especially the ongoing construction of underground tunnels, tunnel boring machines (TBMs) have become an indispensable excavation tool in tunnel construction.

[0003] Patent publication number CN103362515B discloses a high-pressure water flushing system for tunnel boring machines (TBMs). This system prevents mud cake formation in the soil chamber by using high-pressure water flushing and controlling the flow rate. However, practical experience shows that mud cake formation still occurs when high-pressure water flushing is not timely or the flow rate is not frequently controlled. Using a high-pressure brush to disperse the mud cake after it has formed is insufficient to effectively solve the problem. Therefore, this solution can only prevent and avoid mud cake formation in advance. This new solution was developed to address the issue of mud cake formation already occurring. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide an optimized and modified water supply system for shield tunnel soil chambers, which can break up mud cakes.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an optimization and modification device for the water supply system of the soil chamber of a shield tunnel, including a shield cutterhead, a shell and a hydraulic jacking component. The shield cutterhead is disposed at the end of the shell, and the hydraulic jacking component is disposed inside the shell and is used to provide a jacking force for the shield cutterhead. A soil chamber is formed on the side of the shield cutterhead facing the shell, and a spiral conveying pipe is provided at the lower end of the soil chamber.

[0006] The soil chamber is equipped with multiple rings of water inlet pipes, which extend from the shell into the soil chamber. The multiple rings of water inlet pipes are arranged in a ring at intervals along the same axis, and the outlet of the water inlet pipe is facing downwards. Multiple material breaking plates are provided on the back of the shield cutterhead.

[0007] Furthermore, the number of the crushing plates is multiple rings, and the multiple rings of the crushing plates and the multiple rings of the water inlet pipe are arranged in a ring at intervals along the same axis.

[0008] Furthermore, the single-ring water inlet pipe is located between two adjacent rings of crushing plates.

[0009] Furthermore, the breaking plate is triangular pyramidal in shape, and the pointed side of the breaking plate faces the same direction as the shield cutterhead.

[0010] Furthermore, the triangular pyramidal sidewall has an inwardly concave arc surface.

[0011] Furthermore, the breaking plate has connecting holes on three sides, and the breaking plate is fixed by screws passing through the connecting holes and being screwed into the shield cutterhead.

[0012] Furthermore, the material breaking plate is also provided with a plug, which is used to seal the upper opening of the connecting hole.

[0013] Furthermore, the water inlet pipe is prismatic in shape, the minimum included angle between the side of the water inlet pipe and the horizontal plane is 45°, and the liquid outlet is located on the two downward-facing surfaces of the water inlet pipe.

[0014] Furthermore, a high-pressure nozzle is provided at the liquid outlet.

[0015] Furthermore, piezoresistive sensors are installed at the bottom, waist, and top of the soil chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model provides an optimized modification device for the water supply system of a shield tunnel soil chamber. The rotation of the shield cutterhead drives the movement of the breaking plate installed on the back of the shield cutterhead, thereby scraping the soil in the soil chamber. The movement of multiple rings of breaking plate can effectively break up the area where mud cakes are formed in the soil chamber. Then, high-pressure water is sprayed into the soil chamber through the water inlet pipe to enhance the fluidity of the soil slurry, so that the soil slurry can be discharged quickly from the spiral conveying pipe. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of an optimized and modified water supply system for a shield tunnel soil chamber according to the present invention;

[0019] Figure 2 This is a cross-sectional view of the shell structure in this utility model;

[0020] Figure 3 This is a rear view schematic diagram of the shield cutterhead in this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the material breaking plate in this utility model;

[0022] Figure 5 This is a top view of the material breaking plate in this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the water inlet pipe in this utility model.

[0024] The markings in the diagram are: 1. Shield cutterhead; 11. Breaking plate; 111. Connecting hole; 112. Concave arc surface; 2. Shell; 21. Soil chamber; 22. Spiral conveyor pipe; 3. Hydraulic jacking assembly; 4. Water inlet pipe; 41. Liquid outlet. Detailed Implementation

[0025] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0026] like Figures 1-6 As shown, this embodiment provides a water supply system optimization and modification device for the shield tunnel earth chamber 21, including shield cutterhead 1, shell 2 and hydraulic jacking assembly 3.

[0027] The shield cutterhead 1 is located at the end of the shell 2. The hydraulic jacking assembly 3 is located inside the shell 2 and is used to provide jacking force for the shield cutterhead 1. A soil chamber 21 is formed on the side of the shield cutterhead 1 facing the shell 2. A spiral conveying pipe 22 is provided at the lower end of the soil chamber 21. The spiral conveying pipe 22 passes through the soil chamber 21 and extends into the inside of the shell 2.

[0028] Piezoresistive sensors are installed at the bottom, waist, and top of the soil chamber 21. Two rings of water inlet pipes 4 are installed inside the soil chamber 21, extending from the housing 2 into the soil chamber 21. A sealing structure is installed at the connection between the water inlet pipes 4 and the housing 2. There are eight water inlet pipes 4 in each ring, dividing the soil chamber 21 into four quadrants. Each quadrant has two water inlet pipes 4. The water inlet pipes 4 are prismatic, and the minimum included angle between the side of the water inlet pipe 4 and the horizontal plane is 45°. The liquid outlets 41 are located on the two downward-facing surfaces of the water inlet pipes 4. High-pressure nozzles are installed at the liquid outlets 41. With this configuration, when soil falls onto the water inlet pipes 4, it will slide down its side wall, preventing soil from accumulating on the upper surface of the water inlet pipes 4 for a long time, and the liquid outlets 41 will not be blocked.

[0029] The back of the shield cutterhead 1 is equipped with eighteen breaking plates 11, arranged in three rings. These three rings of breaking plates 11 and multiple rings of water inlet pipes 4 are arranged in a circular pattern along the same axis. A ring of water inlet pipes 4 is positioned between adjacent rings of breaking plates 11. Specifically, the breaking plates 11 are triangular pyramidal in shape, with the pointed side of each breaking plate 11 facing the same direction as the shield cutterhead 1. The sidewalls of the triangular pyramids are concave arc surfaces 112, as shown in the figure. The angle formed by the two square faces of the moving breaking plate 11 is a sharp angle, effectively breaking up the mud cake. The triangular pyramidal breaking plates 11 allow for faster and more effective impact on the mud cake, and the concave arc surfaces 112 guide the broken mud cake to both sides.

[0030] Preferably, the three sides of the breaking plate 11 are provided with connecting holes 111. The breaking plate 11 is fixed by screws passing through the connecting holes 111 and screwing into the shield cutterhead 1. The breaking plate 11 is also provided with a plug, which is used to seal the upper opening of the connecting hole 111. The plug is provided to prevent soil from getting stuck in the connecting hole 111, which would make it difficult to disassemble the breaking plate 11.

[0031] Working principle: This solution uses a piezoresistive sensor to determine the pressure value of each area in the soil chamber 21, thereby controlling the water pressure and flow rate of the water inlet pipe 4. When mud cakes form in the soil chamber 21 due to untimely or insufficient liquid discharge from the water inlet pipe 4, the shield cutterhead 1 in this solution will drive the triangular cone-shaped breaking plate 11 to rotate synchronously when it rotates, which can effectively disperse the mud cake formation area, break it up, and facilitate its discharge.

[0032] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A device for optimizing and modifying the water supply system of a shield tunnel earth chamber, characterized in that: It includes a shield cutterhead, a shell, and a hydraulic jacking assembly. The shield cutterhead is located at the end of the shell, and the hydraulic jacking assembly is located inside the shell and is used to provide jacking force for the shield cutterhead. A soil chamber is formed on the side of the shield cutterhead facing the shell, and a spiral conveying pipe is provided at the lower end of the soil chamber. The soil chamber is equipped with multiple rings of water inlet pipes, which extend from the shell into the soil chamber. The multiple rings of water inlet pipes are arranged in a ring at intervals along the same axis, and the outlet of the water inlet pipe is facing downwards. Multiple material breaking plates are provided on the back of the shield cutterhead.

2. The device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 1, characterized in that: The number of crushing plates is multiple rings, and the multiple rings of crushing plates and multiple rings of water inlet pipes are arranged in a ring at intervals along the same axis.

3. The device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 2, characterized in that: The water inlet pipe of a single ring is located between two adjacent rings of crushing plates.

4. A device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 1 or 2, characterized in that: The material breaking plate is triangular pyramidal in shape, and the pointed side of the material breaking plate faces the same direction as the shield cutterhead.

5. The device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 4, characterized in that: The triangular pyramidal sidewall has an inwardly concave arc surface.

6. The device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 4, characterized in that: The material breaking plate has connection holes on three sides, and the material breaking plate is fixed by screws passing through the connection holes and being screwed into the shield cutterhead.

7. The device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 6, characterized in that: The material crushing plate is also provided with a plug, which is used to seal the upper opening of the connecting hole.

8. A device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 1 or 2, characterized in that: The inlet pipe is prismatic in shape, and the minimum included angle between the side of the inlet pipe and the horizontal plane is 45°. The outlet is located on the two downward-facing surfaces of the inlet pipe.

9. The device for optimizing and modifying the water supply system of a shield tunnel earth chamber according to claim 8, characterized in that: A high-pressure nozzle is installed at the liquid outlet.

10. The device for optimizing and modifying the water supply system of a shield tunnel soil chamber according to claim 1, characterized in that: Piezoresistive sensors are installed at the bottom, waist, and top of the soil chamber.

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