Angle-adjustable slurry pipeline and slurry balance shield machine

Abstract

The invention relates to the technical field of tunnel construction, in particular to an angle-adjustable slurry pipeline and a slurry balance shield tunneling machine. A slurry pipeline elbow comprises a rotary driving part, a bent pipe and a nozzle; the bent pipe is connected with the shield tunneling machine rear partition plate through a rotary driving piece, the bent pipe is connected with the nozzle through a rotary driving piece, and each rotary driving piece comprises a first shell, a driving piece, an outer tooth rotary support and a rotary shaft. The first shell is used for being connected to the rear partition plate of the shield tunneling machine, and the rotating shaft is connected to the bent pipe. The rotating shaft is located in the portion, between the bent pipe and the rear partition plate of the shield tunneling machine, of the rotating driving piece. And in the rotary driving piece between the bent pipe and the nozzle, the first shell is connected to the bent pipe, and the rotary shaft is connected to the nozzle. Through the design of the two rotary driving pieces, the direction of the nozzle can be adjusted, the washing area of a single nozzle is increased, and the washing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to an adjustable-angle mud pipeline and a slurry balance shield machine. Background Technology

[0002] The nozzles used in the existing slurry shield tunneling machine's air cushion chamber flushing pipelines are generally fixed with bolts and cannot rotate, allowing them to flush in only one direction. This creates flushing dead zones at the bottom of the air cushion chamber, causing mud and debris to accumulate and affecting tunneling efficiency. Furthermore, because traditional flushing nozzles can only flush in one direction, it is necessary to design multiple flushing pipelines to flush in different directions to minimize dead zones. This also makes the space at the bottom of the air cushion chamber cramped, making routine maintenance difficult for staff. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable-angle mud pipeline and a slurry-balanced tunnel boring machine (TBM) to solve the technical problems of the nozzles in the air cushion chamber flushing pipeline of existing slurry TBMs being unable to rotate and difficult to perform routine maintenance. The specific technical solution is as follows: This invention provides an adjustable-angle mud pipeline, including a rotary drive, a bend, and a nozzle. The bend is connected to the rear bulkhead of the tunnel boring machine (TBM) and to the nozzle via the rotary drive. The rotary drive includes a first housing, a drive component, an external toothed rotary support, and a rotary shaft. The external toothed rotary support has an inner ring and an outer ring that can rotate relative to each other. The first housing is connected to the inner ring, and the rotary shaft is connected to the outer ring. The drive component assembly is mounted on the first housing, and the drive assembly is driven and connected to the outer ring. In the rotary drive located between the bend and the rear bulkhead of the TBM: the first housing is connected to the rear bulkhead of the TBM, and the rotary shaft is connected to the bend; in the rotary drive located between the bend and the nozzle: the first housing is connected to the bend, and the rotary shaft is connected to the nozzle.

[0004] A further improvement of the adjustable angle mud pipe of the present invention is that the rotary drive component further includes a second housing and a bearing bush. The second housing is sleeved on the outer periphery of the bearing bush to form a sliding bearing. The second housing is connected to the first housing, and the bearing bush is connected to the rotary shaft.

[0005] A further improvement of the adjustable angle mud pipe of the present invention is that both the second housing and the bearing are semi-circular butt joint structures.

[0006] A further improvement of the adjustable angle mud pipe of the present invention is that the rotary drive also includes a sealing ring, the second housing extends to the outer periphery of the rotary shaft to form an extension section, and the inner wall of the extension section is provided with a groove for mounting the sealing ring.

[0007] A further improvement of the adjustable angle mud pipe of the present invention is that the rotary drive further includes a first sealing gasket, which is installed between the inner rings of the first housing.

[0008] A further improvement of the adjustable angle mud pipe of the present invention is that the rotary drive further includes a second sealing gasket, which is installed between the outer ring of the rotary shaft.

[0009] A further improvement of the adjustable angle mud pipe of the present invention is that the outer circumference of the outer ring is provided with external teeth, the drive assembly includes a motor and a worm gear, the motor is fixed on the first housing, the output shaft of the motor is connected to the worm gear, and the worm gear is driven to the external teeth.

[0010] A further improvement of the adjustable-angle mud pipe of the present invention is that the outlet of the nozzle is elliptical.

[0011] A further improvement of the adjustable angle mud pipe of the present invention is that the inner walls of the first housing and the rotating shaft are provided with a wear-resistant layer.

[0012] The present invention also provides a slurry balance shield machine, including an adjustable-angle slurry pipeline as described above, the adjustable-angle slurry pipeline being connected to the rear bulkhead of the shield machine.

[0013] The application of the technical solution of the present invention has the following beneficial effects: This invention relates to an adjustable-angle mud pipeline. Through the design of two sets of rotary drive components, the nozzle direction can be adjusted, increasing the scouring area of ​​a single nozzle and improving scouring efficiency. The adjustable nozzle angle increases the scouring area of ​​a single nozzle, reducing scouring dead zones and eliminating the need to increase the number of nozzles to increase the scouring area. The reduced number of nozzles also facilitates personnel access to the air cushion chamber for maintenance of equipment such as the crusher. This solves the technical problem in existing slurry shield tunneling machine air cushion chamber scouring pipelines where the nozzles cannot rotate and are difficult to maintain. This invention uses drive components to rotate the outer teeth of the external tooth rotary support around the inner ring. Since the inner ring of the external tooth rotary support is fixedly connected to the first housing, the rotation of the outer teeth of the external tooth rotary support drives the rotation shaft connected to the outer teeth (outer ring) to rotate, further driving the bend pipe to rotate. The design of two sets of rotary drive components achieves two degrees of freedom for nozzle angle adjustment, further increasing the scouring area and scouring efficiency.

[0014] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the adjustable-angle mud pipeline of the present invention; Figure 2 This is a schematic diagram of the installation of the adjustable-angle mud pipeline of the present invention; Figure 3 This is a cross-sectional view of the nozzle of the adjustable-angle mud pipeline of the present invention; Figure 4 This is a front view of the rotary drive component of the adjustable-angle mud pipeline of the present invention; Figure 5 This is a side view of the rotary drive component of the adjustable-angle mud pipeline of the present invention; Figure 6 This is a top view of the rotary drive component of the adjustable-angle mud pipeline of the present invention; Figure 7 This is an exploded view of the rotary drive component of the adjustable-angle mud pipeline of the present invention; Figure 8 yes Figure 4 AA-line sectional view; Figure 9 yes Figure 5 BB line section view.

[0016] Among them, 1-rotation drive component; 1.1-first housing; 1.2-worm gear; 1.3-motor; 1.4-first sealing gasket; 1.5-second housing; 1.6-external toothed rotary support; 1.7-second sealing gasket; 1.8-bearing bush; 1.9-sealing ring; 1.10-rotation shaft; 2-bend; 3-rear bulkhead of tunnel boring machine; 4-nozzle. Detailed Implementation

[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] See Figures 1-9As shown, an adjustable-angle mud pipeline includes a rotary drive 1, a bend 2, and a nozzle 4. The bend 2 is connected to the rear partition 3 of the tunnel boring machine and to the nozzle 4 via the rotary drive 1. The rotary drive 1 includes a first housing 1.1, a drive element, an external toothed rotary support 1.6, and a rotary shaft 1.10. The external toothed rotary support 1.6 has an inner ring and an outer ring that can rotate relative to each other. The first housing 1.1 is connected to the inner ring, and the rotary shaft 1.10 is connected to the outer ring. The drive assembly is mounted on the first housing 1.1, and the drive assembly is driven to the outer ring; in the rotary drive 1 located between the bend 2 and the rear bulkhead 3 of the tunnel boring machine: the first housing 1.1 is used to connect to the rear bulkhead 3 of the tunnel boring machine, and the rotary shaft 1.10 is connected to the bend 2; in the rotary drive 1 located between the bend 2 and the nozzle 4: the first housing 1.1 is connected to the bend 2, the first housing 1.1 is used to connect to the rear bulkhead 3 of the tunnel boring machine, and the rotary shaft 1.10 is connected to the nozzle 4.

[0019] In this embodiment, a flange is provided at one end of the first housing 1.1 away from the rotating shaft 1.10. The entire adjustable angle mud pipe can be fixed to the rear partition 3 of the tunnel boring machine by bolts and flange. An opening is provided on the rear partition 3 of the tunnel boring machine. The mud pipe can be connected to the first housing 1.1 from the other side of the rear partition 3 of the tunnel boring machine through the opening, so as to carry out the flushing operation.

[0020] Preferred, such as Figures 7-9 As shown, the rotary drive component 1 also includes a second housing 1.5 and a bearing bush 1.8. The second housing 1.5 is fitted onto the outer periphery of the bearing bush 1.8 to form a sliding bearing. The second housing 1.5 is connected to the first housing 1.1, and the bearing bush 1.8 is connected to the rotary shaft 1.10. The second housing 1.5 serves as a support, and the bearing bush 1.8 is rotatably mounted inside the second housing 1.5, thus forming a sliding bearing structure. The bearing bush 1.8 is fitted onto the outer periphery of the rotary shaft 1.10, thereby protecting the rotary shaft 1.10 while allowing the rotary shaft 1.10 to rotate normally through the sliding bearing structure.

[0021] Preferably, both the second housing 1.5 and the bearing bush 1.8 are semi-circular mating structures to facilitate the disassembly and installation of the rotating shaft 1.10. In this embodiment, both ends of the semi-circular mating structure are provided with perforated lugs, and the mating connection is achieved by bolting the perforated lugs together.

[0022] Preferably, the rotary drive component 1 further includes a sealing ring 1.9. The second housing 1.5 extends to the outer periphery of the rotary shaft 1.10 to form an extension section, and the inner wall of the extension section is provided with a groove for installing the sealing ring 1.9. In this embodiment, there are multiple sealing rings 1.9 (preferably three), and the number of grooves is equal to the number of sealing rings 1.9, and they are installed in a one-to-one correspondence. The sealing rings 1.9 can prevent external mud from entering the interior of the rotary drive component 1 and contaminating the sliding bearing.

[0023] Preferably, the rotary drive 1 further includes a first sealing gasket 1.4, which is installed between the inner rings of the first housing 1.1. The first sealing gasket 1.4 can prevent mud from contaminating the interior of the external gear rotary support 1.6.

[0024] Preferably, the rotary drive component 1 further includes a second sealing gasket 1.7, which is installed between the outer ring of the rotary shaft 1.10. Furthermore, a slot for placing the second sealing gasket 1.7 is provided on the rotary shaft 1.10 at the connection surface of the outer ring, and the second sealing gasket 1.7 also prevents mud from contaminating the interior of the external gear rotary support 1.6.

[0025] Preferably, the outer ring has external teeth on its outer periphery. The drive assembly includes a motor 1.3 and a worm gear 1.2. The motor 1.3 is fixed to the first housing 1.1, and the output shaft of the motor 1.3 is connected to the worm gear 1.2. The worm gear 1.2 is driven by the external teeth. The bottom of the motor 1.3 has a base, which is fixed to the first housing 1.1. The output shaft of the motor 1.3 drives the worm gear 1.2 to drive the external teeth of the external tooth rotary support 1.6 to rotate around the inner ring. At the same time, the external teeth of the outer ring drive the rotary shaft 1.10 to rotate, thereby realizing the angle adjustment of the bent pipe 2.

[0026] Preferred, such as Figure 3 As shown, the outlet of the nozzle 4 is elliptical to increase the scouring area and improve scouring efficiency.

[0027] Preferably, the inner walls of the first housing 1.1 and the rotating shaft 1.10 are provided with wear-resistant layers. Since the inner layers of both the first housing 1.1 and the rotating shaft 1.10 are pipes used to pass slurry, the inside of the pipes undergoes wear-resistant treatment and is overlaid with a wear-resistant layer to extend their service life. For example, a bimetallic wear-resistant composite pipe can be used, consisting of an outer layer of carbon steel and an inner layer of wear-resistant high-chromium alloy. The wear-resistant process includes centrifugal casting or overlay welding. The wear-resistant layer can be made of materials such as corundum ceramic (Al2O3 purity ≥ 95%), bimetallic wear-resistant alloy (composed of an inner layer of wear-resistant alloy steel and an outer layer of ordinary steel; the inner layer of wear-resistant alloy steel effectively resists the impact and wear of high-speed flowing particles, while the outer layer of ordinary steel provides overall strength and stability), or silicon carbide. Furthermore, the bends and nozzles are also treated with the aforementioned wear-resistant process or made of wear-resistant materials.

[0028] When the rotary drive 1 is working, the output shaft of the motor 1.3 drives the worm gear 1.2 to drive the outer tooth of the external tooth rotary support 1.6 to rotate around the inner ring. Since the inner ring of the external tooth rotary support 1.6 is fixedly connected to the first housing 1.1, when the outer tooth of the external tooth rotary support 1.6 rotates, it drives the rotary shaft 1.10 connected to the outer tooth (outer ring) to rotate, and further drives the flange-connected bend 2 to rotate.

[0029] The present invention also provides a slurry balance shield machine, including an adjustable-angle slurry pipeline as described above, which is connected to the rear bulkhead 3 of the shield machine. During shield machine operation, the air cushion chamber observation system of the shield machine is used to identify the slurry accumulation area. The control system controls the slewing drive 1 to adjust the flushing direction of the nozzle 4, thereby improving flushing efficiency.

[0030] This invention relates to an adjustable-angle mud pipeline. Through a rotary drive component 1, the direction of the nozzle 4 is adjustable, increasing the flushing area of ​​a single nozzle 4 and improving flushing efficiency. By adjusting the angle of the nozzle 4, the flushing area of ​​a single nozzle 4 is increased, reducing blind spots and eliminating the need to increase the number of nozzles 4 to increase the flushing area. The reduced number of nozzles 4 also facilitates personnel access to the air cushion chamber for maintenance of equipment such as the crusher. This solves the technical problem in existing slurry shield tunneling machine air cushion chamber flushing pipelines where the nozzles 4 cannot rotate and are difficult to maintain routinely. This invention achieves two degrees of freedom angle adjustment for the nozzle 4 through the rotary drive component 1, further increasing the flushing area and flushing efficiency.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An adjustable-angle mud pipe, characterized in that, It includes a rotary drive (1), a bend (2) and a nozzle (4); the bend (2) is connected to the rear partition (3) of the tunnel boring machine and to the nozzle (4) through the rotary drive (1); The rotary drive (1) includes a first housing (1.1), a drive component, an external tooth rotary support (1.6), and a rotary shaft (1.10). The external tooth rotary support (1.6) is provided with an inner ring and an outer ring that can rotate relative to each other. The first housing (1.1) is connected to the inner ring, and the rotary shaft (1.10) is connected to the outer ring. The drive component assembly is mounted on the first housing (1.1), and the drive assembly is driven and connected to the outer ring. In the slewing drive (1) located between the bend (2) and the rear partition (3) of the tunnel boring machine: the first housing (1.1) is used to connect to the rear partition (3) of the tunnel boring machine, and the slewing shaft (1.10) is connected to the bend (2). In the rotary drive (1) located between the bend (2) and the nozzle (4): the first housing (1.1) is connected to the bend (2), and the rotary shaft (1.10) is connected to the nozzle (4).

2. The adjustable-angle mud pipeline according to claim 1, characterized in that, The rotary drive component (1) further includes a second housing (1.5) and a bearing bush (1.8). The second housing (1.5) is sleeved on the outer periphery of the bearing bush (1.8) to form a sliding bearing. The second housing (1.5) is connected to the first housing (1.1), and the bearing bush (1.8) is connected to the rotary shaft (1.10).

3. The adjustable-angle mud pipeline according to claim 2, characterized in that, The second housing (1.5) and the bearing (1.8) are both semi-circular butt joint structures.

4. The adjustable-angle mud pipeline according to claim 2, characterized in that, The rotary drive (1) also includes a sealing ring (1.9), and the second housing (1.5) extends to the outer periphery of the rotary shaft (1.10) to form an extension section, the inner wall of which is provided with a groove for mounting the sealing ring (1.9).

5. The adjustable-angle mud pipeline according to claim 1, characterized in that, The rotary drive (1) further includes a first sealing gasket (1.4), which is installed between the inner rings of the first housing (1.1).

6. The adjustable-angle mud pipeline according to claim 1, characterized in that, The rotary drive (1) further includes a second sealing gasket (1.7), which is installed between the outer rings of the rotary shaft (1.10).

7. The adjustable-angle mud pipeline according to claim 1, characterized in that, The outer ring has external teeth on its outer periphery. The drive assembly includes a motor (1.3) and a worm gear (1.2). The motor (1.3) is fixed on the first housing (1.1). The output shaft of the motor (1.3) is connected to the worm gear (1.2). The worm gear (1.2) is driven by the external teeth.

8. The adjustable-angle mud pipeline according to claim 1, characterized in that, The outlet of the nozzle (4) is elliptical.

9. The adjustable-angle mud pipeline according to claim 1, characterized in that, The inner walls of the first housing (1.1) and the rotating shaft (1.10) are provided with a wear-resistant layer.

10. A slurry balance shield tunneling machine, characterized in that, Includes the adjustable-angle mud pipe as described in claim 1, wherein the adjustable-angle mud pipe is connected to the rear bulkhead (3) of the tunnel boring machine.

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