A quarrying box for slurry shield and a shield machine

Abstract

The present invention belongs to the field of shield equipment, and discloses a quarrying box for a slurry shield and a shield machine. The quarrying box for a slurry shield includes a first bend, a second bend, a first grid, and a second grid. One end of the first bend is connected to one end of the second bend, and the other end of the first bend and the other end of the second bend are respectively connected to a slurry discharge pipe, and along the direction of slurry flow, the first bend is located behind the second bend; the first grid is provided in the slurry discharge pipe and is located at the connection between the first bend and the slurry discharge pipe, and the first grid forms an angle with the axial direction of the slurry discharge pipe to guide stones larger than a preset size into the first bend; the second grid is provided in the second bend and is located at the connection between the second bend and the slurry discharge pipe, and the second grid is used to block stones larger than a preset size from entering the slurry discharge pipe. The present invention can effectively collect large-sized stones during the shield process, prevent large-sized stones from clogging the slurry discharge pipe, and ensure the normal and efficient operation of the circulation system.

Description

Technical Field

[0001] The present invention relates to the field of shield equipment, in particular to a quarrying box for a slurry shield and a shield machine. Background Art

[0002] A shield machine (TBM) is a tunnel boring machine that uses the shield method. Its basic operating principle is that a cylindrical steel assembly advances along the tunnel axis, excavating the soil as it advances. The shell of this cylindrical assembly, the shield, provides temporary support for the excavated, unlined tunnel section, bearing the pressure of the surrounding soil and, in some cases, groundwater pressure, thereby keeping it out. Excavation, soil removal, and lining operations are carried out under the protection of the shield.

[0003] The slurry shield machine stabilizes the excavation face by pressurizing mud water or slurry (usually bentonite suspension). There is a sealed partition behind the cutterhead, forming a mud water chamber between the cutterhead and the excavation face, which is filled with mud. The excavated soil and mud are mixed and transported to the separation plant outside the tunnel by a mud pump. After separation, the mud is reused.

[0004] For some hard excavation strata, such as moderately weathered tuffaceous gravel sandstone, the gravel is strong and the size of the stones entering the slurry pipeline through the crusher and the screen is as large as 20cm×24.5cm×35cm, while the size of the screen is only 20cm×25cm, resulting in sluggish discharge in the slurry pipeline and jamming of the slurry pump. The existing conventional treatment method is to install a rockfall box at the bottom of the slurry pipeline to collect stones and rocks. However, due to the high density of the rocks, the slurry flow rate in the rockfall box is slow. It is often the case that the rockfall box is filled with small rocks and debris that can be discharged normally before the large rocks that affect the circulation system are collected. Frequent opening and cleaning of the box is necessary, which does not achieve the desired effect and instead adds a lot of extra work. In addition, the rockfall box is bulky, difficult to manufacture, transport and install, and is costly. Summary of the Invention

[0005] The purpose of the present invention is to provide a quarrying box and a shield machine for a slurry shield, which can effectively collect large-sized stones during the shield process, prevent large-sized stones from clogging the slurry discharge pipe, and ensure the normal and efficient operation of the circulation system.

[0006] To achieve the above objectives, the following technical solutions are provided:

[0007] In a first aspect, a quarrying box for a slurry shield is provided, comprising:

[0008] a first curved pipe and a second curved pipe, wherein one end of the first curved pipe is connected to one end of the second curved pipe, the other end of the first curved pipe and the other end of the second curved pipe are configured to be connected to the slurry discharge pipe respectively, and the first curved pipe is located behind the second curved pipe in the direction of slurry flow;

[0009] a first grid disposed in the slurry discharge pipe and located at the connection between the first curved pipe and the slurry discharge pipe, wherein the first grid forms an angle with the axial direction of the slurry discharge pipe so as to guide stones larger than a preset size into the first curved pipe;

[0010] The second grid is arranged in the second curved pipe and is located at the connection between the second curved pipe and the slurry discharge pipe. The second grid is used to prevent stones larger than the preset size from entering the slurry discharge pipe.

[0011] As an optional solution of the quarrying box for the slurry shield of the present invention, the first grid includes a plurality of first bars, and the plurality of first bars are arranged in parallel and at intervals.

[0012] As an optional solution of the quarrying box for the slurry shield of the present invention, the angle between the first grid bar and the axial direction of the slurry discharge pipe is 30°.

[0013] As an optional solution of the quarrying box for the slurry shield of the present invention, the second grid includes a plurality of second bars and a plurality of third bars, and the second bars form an angle with the third bars.

[0014] As an optional solution for the quarrying box for the slurry shield of the present invention, multiple second bars are arranged at intervals along the axial direction of the slurry discharge pipe, each second bar is perpendicular to the axial direction of the slurry discharge pipe, the third bars are perpendicular to the second bars, and multiple third bars are arranged at intervals.

[0015] As an optional solution of the quarrying box for the slurry shield of the present invention, the first grid is welded to the slurry discharge pipe; and / or,

[0016] The second grid is welded to the second bent pipe.

[0017] As an optional solution of the quarrying box for the slurry shield of the present invention, the central angles of the first bend pipe and the second bend pipe are both 90°.

[0018] As an optional solution of the quarrying box for the slurry shield of the present invention, a first slag cleaning pipe is provided on the first curved pipe, an end of the first slag cleaning pipe away from the first curved pipe is a first slag cleaning port, and the first slag cleaning port is provided with a first cover that can be opened;

[0019] The second curved pipe is provided with a second slag cleaning pipe, an end of the second slag cleaning pipe away from the second curved pipe is a second slag cleaning port, and the second slag cleaning port is provided with a second cover that can be opened.

[0020] As an optional solution of the quarrying box for the slurry shield of the present invention, it also includes a slurry discharge ball valve, which is arranged on the second elbow and located between the second grid and the slurry discharge pipe.

[0021] In a second aspect, a shield machine is provided, comprising the quarrying box for the slurry shield as described above, and the shield machine further comprising a slurry discharge pipe.

[0022] The beneficial effects of the present invention are:

[0023] The quarrying box for a slurry shield provided by the present invention is connected to the slurry discharge pipe of the shield machine's circulation system. Mud and stones flow from the excavation front end to the ground through the slurry discharge pipe. The quarrying box for a slurry shield is used to effectively collect large-sized stones during the shield process, prevent large-sized stones from clogging the slurry discharge pipe, and ensure the normal and efficient operation of the circulation system. When the mud and stones pass through the first grid, the mud and small-sized stones can pass through the first grid smoothly, while stones larger than the preset size cannot pass through the first grid and are guided by the first grid into the first bend and into the second bend. The second grid is used to prevent stones larger than the preset size from entering the slurry discharge pipe. At the same time, the second grid is also used to allow stones smaller than the preset size that mistakenly enter the first bend and the second bend to pass through. The first grid and first curved pipe are used to collect rocks larger than a preset size, while the second curved pipe and the second grid located therein are used to collect rocks larger than the preset size. This ensures that only slurry and small rocks continue to flow through the slurry discharge pipe, preventing pipe blockage and ensuring the normal operation of the circulation system. When the second curved pipe is full of rocks larger than the preset size, the first curved pipe is used to collect rocks larger than the preset size.

[0024] The shield machine provided by the present invention includes the above-mentioned quarrying box for slurry shield, which can effectively collect large-sized stones during the shield process, prevent large-sized stones from clogging the slurry discharge pipe, and ensure the normal and efficient operation of the circulation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. 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 the contents of the embodiments of the present invention and these drawings without any creative work.

[0026] Figure 1 Schematic diagram of a quarrying box for a slurry shield provided in an embodiment of the present invention Figure 1 ;

[0027] Figure 2 Schematic diagram of a quarrying box for a slurry shield provided in an embodiment of the present invention Figure 2 .

[0028] Reference numerals:

[0029] 100. Slurry discharge pipe;

[0030] 1. First elbow; 2. Second elbow; 3. First grille; 4. Second grille; 5. First slag removal pipe; 6. First cover; 7. Second slag removal pipe; 8. Second cover; 9. Slurry discharge ball valve; 10. Clamp;

[0031] 31. First bar;

[0032] 41. Second bar; 42. Third bar. DETAILED DESCRIPTION

[0033] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0036] This embodiment provides a quarrying box for a slurry shield, which is connected to the slurry discharge pipe (main slurry discharge pipe) of the shield machine's circulation system. Mud and stones flow from the front end of the excavation to the ground through the slurry discharge pipe. The quarrying box for the slurry shield is used to effectively collect large-sized stones during the shield process, prevent large-sized stones from clogging the slurry discharge pipe, and ensure the normal and efficient operation of the circulation system.

[0037] like Figure 1 and Figure 2As shown, the quarrying box for the slurry shield of this embodiment includes a first bend 1, a second bend 2, a first grid 3 and a second grid 4. One end of the first bend 1 is connected to one end of the second bend 2, and the other end of the first bend 1 and the other end of the second bend 2 are respectively connected to the slurry discharge pipe 100. Along the flow direction of the mud (parallel to the axial direction of the slurry discharge pipe 100), the first bend 1 is located behind the second bend 2, that is, the first bend 1 is closer to the inlet of the slurry discharge pipe 100, and the second bend 2 is closer to the outlet of the slurry discharge pipe 100. The first grid 3 is arranged on the slurry discharge pipe 100 and is located at the connection between the first bend 1 and the slurry discharge pipe 100. The first grid 3 forms an angle with the axial direction of the slurry discharge pipe 100 to guide stones larger than a preset size into the first bend 1. When slurry and rocks pass through the first grate 3, they are allowed to pass smoothly through it. Rocks larger than a preset size are prevented from passing through it and are directed by it into the first curved pipe 1 and into the second curved pipe 2. A second grate 4 is located within the second curved pipe 2, at the junction of the second curved pipe 2 and the slurry discharge pipe 100. This prevents rocks larger than a preset size from entering the slurry discharge pipe 100. It also allows rocks smaller than a preset size that stray into the first and second curved pipes 1 and 2 to pass through. The first grate 3 and the first curved pipe 1 are used to collect rocks larger than a preset size, while the second curved pipe 2 and the second grate 4 located therein collect rocks larger than a preset size. This ensures that only slurry and small rocks continue to flow through the slurry discharge pipe 100, preventing blockage and ensuring the proper functioning of the circulation system. Once the second curved pipe 2 is filled with rocks larger than a preset size, the first curved pipe 1 is used to collect rocks larger than a preset size.

[0038] Preferably, the first curved pipe 1 and the second curved pipe 2 are both located above the slurry discharge pipe 100 .

[0039] It is understood that the preset size is the maximum size of the stone that does not block the slurry discharge pipe 100. In this embodiment, the preset size is 15 cm. In other embodiments, the preset size can be set according to the geology of the excavation soil layer and the size of the slurry discharge pipe 100.

[0040] Optionally, the first grid 3 includes a plurality of first bars 31, which are arranged in parallel and spaced apart. The dimensions of two adjacent first bars 31 are preset. For example, the first bars 31 are steel bars. In this embodiment, the slurry discharge pipe 100 is a steel pipe with an inner diameter of 500 mm and a wall thickness of 40 mm. Two first bars 31 are provided, and the net distance between the two first bars 31 is 15 cm.

[0041] Optionally, the axial angle between the first bar 31 and the slurry discharge pipe 100 is 30°. The first bar 31 includes a first end and a second end, the first end being closer to the outlet of the slurry discharge pipe 100 and the second end being closer to the first elbow 1. In other embodiments, the axial angle between the first bar 31 and the slurry discharge pipe 100 can also be adjusted according to specific circumstances.

[0042] Optionally, the second grid 4 includes a plurality of second bars 41 and a plurality of third bars 42, and the second bars 41 and the third bars 42 are angled with each other. Grid holes are formed between the second bars 41 and the third bars 42 to allow mud and stones smaller than a preset size that have mistakenly entered the first and second bends 1 and 2 to pass through and enter the slurry discharge pipe 100.

[0043] In this embodiment, a plurality of second bars 41 are spaced apart along the axial direction of the slurry discharge pipe 100, each second bar 41 being perpendicular to the axial direction of the slurry discharge pipe 100. Third bars 42 are perpendicular to the second bars 41, and a plurality of third bars 42 are spaced apart. For example, the second bars 41 and the third bars 42 are both steel bars. The net distance between two adjacent second bars 41 is 15 cm, and the net distance between two adjacent third bars 42 is also 15 cm.

[0044] Optionally, the first grid 3 is welded to the slurry discharge pipe 100, which is convenient for construction and reliable for connection. The second grid 4 is welded to the second elbow 2, which is convenient for construction and reliable for connection.

[0045] Optionally, the central angles of the first curved pipe 1 and the second curved pipe 2 are both 90°, that is, the first curved pipe 1 and the second curved pipe 2 are both quarter-circular pipes, which facilitates the smooth flow of stones in the first curved pipe 1 and the second curved pipe 2.

[0046] Optionally, the first curved pipe 1 is provided with a first slag cleaning pipe 5. The end of the first slag cleaning pipe 5 away from the first curved pipe 1 is a first slag cleaning port, which is provided with an openable first cover 6. The second curved pipe 2 is provided with a second slag cleaning pipe 7. The end of the second slag cleaning pipe 7 away from the second curved pipe 2 is a second slag cleaning port, which is provided with an openable second cover 8. When the first curved pipe 1 and the second curved pipe 2 are filled with stones larger than a preset size, the first cover 6 and the second cover 8 are opened to clear the stones.

[0047] Optionally, the first slag cleaning pipe 5 is positioned at the waist of the first curved pipe 1. The first slag cleaning pipe 5 is welded to the first curved pipe 1. The first cover 6 is made of a steel plate. The first cover 6 and the first slag cleaning pipe 5 are connected by a clamp 10, which facilitates quick assembly and disassembly of the first cover 6, improves the efficiency of clearing rocks, and accelerates the resumption of work.

[0048] Similarly, the second slag cleaning pipe 7 is located at the waist of the second elbow 2. The second slag cleaning pipe 7 is welded to the second elbow 2. The second cover 8 is made of steel plate. A clamp 10 connects the second cover 8 to the second slag cleaning pipe 7, facilitating quick assembly and disassembly of the second cover 8, improving the efficiency of clearing rocks and expediting work resumption.

[0049] Optionally, the first curved pipe 1 and the second curved pipe 2 are an integrally formed (eg, cast) structure, which saves processing steps and has high overall structural strength.

[0050] Optionally, the quarrying box for the slurry shield further includes a slurry discharge ball valve 9, which is provided on the second bend pipe 2 and located between the second grid 4 and the slurry discharge pipe 100. When the first cover 6 and the second cover 8 are removed, the first bend pipe 1 and the second bend pipe 2 need to be depressurized. At this time, the slurry discharge ball valve 9 is opened to discharge a small amount of slurry in the second bend pipe 2.

[0051] This embodiment also provides a shield machine, including the aforementioned quarrying box for a slurry shield, and further including a slurry discharge pipe 100. The shield machine's circulation system can operate normally and efficiently. The shield machine is particularly suitable for excavating geologically hard soil layers (such as moderately weathered tuffaceous gravelly sandstone).

[0052] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A quarrying box for a slurry shield, characterized in that: include: A first curved pipe (1) and a second curved pipe (2), one end of the first curved pipe (1) and one end of the second curved pipe (2) being connected, the other end of the first curved pipe (1) and the other end of the second curved pipe (2) being configured to be connected to a slurry discharge pipe (100) respectively, and the first curved pipe (1) is located behind the second curved pipe (2) along the slurry flow direction; A first grid (3) is provided in the slurry discharge pipe (100) and is located at the connection between the first curved pipe (1) and the slurry discharge pipe (100), wherein the first grid (3) forms an angle with the axial direction of the slurry discharge pipe (100) so as to guide stones larger than a preset size into the first curved pipe (1); A second grid (4) is provided in the second curved pipe (2) and is located at the connection between the second curved pipe (2) and the slurry discharge pipe (100), the second grid (4) being used to prevent stones larger than the preset size from entering the slurry discharge pipe (100); The first grid (3) and the first curved pipe (1) are used to collect stones larger than the preset size, and the second curved pipe (2) and the second grid (4) arranged therein are used to collect stones larger than the preset size; The first grid (3) comprises a plurality of first bars (31), and the plurality of first bars (31) are arranged in parallel and at intervals; The included angle between the first grid bar (31) and the axial direction of the slurry discharge pipe (100) is 30°; The central angles of the first curved pipe (1) and the second curved pipe (2) are both 90°; A first slag cleaning pipe (5) is provided on the first curved pipe (1); an end of the first slag cleaning pipe (5) away from the first curved pipe (1) is a first slag cleaning port; the first slag cleaning port is provided with an openable first cover (6); A second slag cleaning pipe (7) is provided on the second curved pipe (2), and an end of the second slag cleaning pipe (7) away from the second curved pipe (2) is a second slag cleaning port, and the second slag cleaning port is provided with an openable second cover (8).

2. The quarrying box for slurry shield according to claim 1, characterized in that: The second grid (4) comprises a plurality of second bars (41) and a plurality of third bars (42), and the second bars (41) and the third bars (42) form an angle.

3. The quarrying box for slurry shield according to claim 2, characterized in that: A plurality of second bars (41) are arranged at intervals along the axial direction of the slurry discharge pipe (100), each of the second bars (41) is perpendicular to the axial direction of the slurry discharge pipe (100), the third bars (42) are perpendicular to the second bars (41), and a plurality of the third bars (42) are arranged at intervals.

4. The quarrying box for a slurry shield according to any one of claims 1 to 3, characterized in that: The first grid (3) is welded to the slurry discharge pipe (100); and / or, The second grid (4) is welded to the second bent pipe (2).

5. The quarrying box for slurry shield according to any one of claims 1 to 3, characterized in that: It also includes a slurry discharge ball valve (9), which is arranged on the second curved pipe (2) and located between the second grid (4) and the slurry discharge pipe (100).

6. A shield machine, characterized in that: The shield machine comprises a quarrying box for a slurry shield as described in any one of claims 1 to 5, and the shield machine further comprises a slurry discharge pipe (100).

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