Slurry door fence of shield tunneling machine

Abstract

The utility model relates to the technical field of scouring and screening at slurry doors of shield tunneling machines, in particular to a shield tunneling machine slurry door fence which comprises a partition plate used for separating a slurry bin and an air cushion bin, the partition plate is provided with a slurry door, and a stone crusher is installed in front of the slurry door and installed in the slurry bin. Two washing pipes are arranged between the stone crusher and the slurry door; the washing pipes are mounted on the inner wall of the shield machine shell on the two sides of the stone crusher; and a cross rod is connected between the two washing pipes. The flushing pipe is used for jetting high-pressure water flow to carry out directional flushing on broken stones and slurry crushed by the stone crusher, so that the broken stones are prevented from being accumulated to block a slurry door flow channel; the arrangement of the cross bar can enhance the stability of the flushing pipe mounting structure, ensure the accuracy of the flushing position, cooperate with the preliminary crushing function of the stone crusher, can effectively reduce the probability that large-particle-size broken stones enter the slurry door, and ensure the slurry pressure balance and excavation face safety in the tunneling process of the shield tunneling machine.

Description

Technical Field

[0001] This utility model relates to the field of scouring and screening technology at the mud gate of a tunnel boring machine, and in particular to a mud gate fence for a tunnel boring machine. Background Technology

[0002] The slurry door of a tunnel boring machine (TBM) is a key component of a slurry-balanced TBM. Located in a sealed chamber behind the cutterhead, its main function is to control the entry and exit of slurry and maintain the slurry pressure within the sealed chamber, thereby balancing the water and soil pressure at the excavation face and ensuring the safety of tunnel excavation. Its working environment is complex, subject to long-term scouring, abrasion, and particle impact from high-concentration slurry, making it prone to wear and blockage, which can affect the normal tunneling progress of the TBM.

[0003] To address the aforementioned issues, patent CN207212341U discloses a cutterhead flushing system for tunnel boring machines (TBMs) operating in high-viscosity mudstone. The system includes nozzles, a water jet device, and a mud circulation device. The water jet device is connected to the outlet of a high-pressure pump via a high-pressure hose. The mud-water chamber and the air cushion chamber are interconnected at their bottoms, with a mud gate located at the connection point. A stone crusher is mounted on the mud gate. The water jet device comprises a water jet steel pipe that passes sequentially through the second partition, the air cushion chamber, and the first partition of the TBM and extends into the mud-water chamber; a water jet nozzle located at one end of the water jet steel pipe inside the mud-water chamber; and a blowout preventer located at the other end of the water jet steel pipe. The blowout preventer is mounted on the second partition.

[0004] In the above scheme, the stones shredded by the stone crusher will still contain large-volume fragments. If these fragments pass through the mud gate, they can easily cause material blockage in the screw conveyor of the slurry discharge hole, affecting the working efficiency of the tunnel boring machine. Utility Model Content

[0005] To address the problem that some large-volume stones produced by current stone crushers can easily cause blockages in the screw conveyor of the slurry discharge hole if they pass through the mud gate, thus affecting the working efficiency of the tunnel boring machine, this utility model provides a mud gate fence for tunnel boring machines.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] A mud gate fence for a tunnel boring machine includes a partition for separating a mud-water chamber and an air cushion chamber. A mud gate is provided on the partition. A stone crusher is installed in front of the mud gate and is installed inside the mud-water chamber. Two flushing pipes are provided between the stone crusher and the mud gate. The flushing pipes are installed on the inner walls of the tunnel boring machine shell on both sides of the stone crusher. A crossbar connects the two flushing pipes. This shield tunneling machine's mud gate barrier uses two flushing pipes installed on the inner wall of the shield machine casing between the crusher and the mud gate. A crossbar connects the two pipes, allowing high-pressure water jets to be sprayed through the flushing pipes to directionally flush the crushed stone and mud, preventing stone accumulation and blockage of the mud gate's flow channel. The crossbar enhances the stability of the flushing pipe installation structure, ensuring precise flushing positioning. Combined with the crusher's initial crushing function, this effectively reduces the probability of large-diameter stones entering the mud gate, improves mud flow efficiency, and lowers the risk of malfunctions caused by scouring wear and stone blockage, ensuring mud pressure balance and excavation face safety during shield tunneling.

[0008] Preferably, the crossbar includes a connecting rod and connectors fixedly installed at both ends of the connecting rod; the connectors connect to the flushing pipes. The crossbar adopts a structural design of connecting rod and connectors at both ends. The connectors securely connect the connecting rod and the flushing pipes, forming a rigid support structure. This enhances the installation stability between the two flushing pipes, preventing displacement or loosening of the flushing pipes due to shield machine vibration or the reaction force of high-pressure flushing water flow. It ensures that the flushing pipes always maintain the preset spray angle and spacing, making the high-pressure water flow more uniform and precise in flushing the area between the crusher and the mud gate. This continuously and effectively removes crushed stone accumulation and mud adhesion, improving flushing efficiency while extending the service life of the flushing pipes and related components, ensuring the unobstructed flow of the mud gate area and the reliability of equipment operation.

[0009] Preferably, the connecting rod includes a sleeve and a sliding rod; the sliding rod is slidably disposed within the sleeve; several through holes are provided on the sleeve and the sliding rod, and a bolt is disposed within each through hole; a connector is fixedly disposed at one end of the sleeve; a connector is fixedly disposed at the end of the sliding rod away from the sleeve. The connecting rod adopts a sliding structure of sleeve and sliding rod, and both are provided with several through holes with bolts, allowing the sliding rod to slide within the sleeve to adjust the overall length of the connecting rod. This allows for flexible adjustment of the distance between the two flushing pipes according to the actual internal space layout and flushing requirements of the tunnel boring machine, meeting the installation and usage requirements under different working conditions. During installation, tightening the bolts in the corresponding through holes locks the sliding rod and sleeve in the appropriate position, ensuring a stable connection, effectively enhancing the support stability of the crossbar for the flushing pipe, ensuring the flushing pipe functions properly, and improving the cleaning effect of the mud gate fence on gravel and mud.

[0010] Preferably, the casing is shaped like a polygonal prism shell, and the sliding rod is also shaped like a polygonal prism. The polygonal shell design of the casing and the polygonal prism design of the sliding rod effectively restricts the circumferential rotation of the sliding rod within the casing through the geometric constraints of the multifaceted surfaces. This ensures that the sliding rod slides only along the axial direction of the casing to adjust its length, preventing the installation angle of the flushing pipe from shifting due to rotation, which would affect the jet direction and flushing effect of the high-pressure water flow. The surface contact characteristics of the polygonal structure also increase the friction between the casing and the sliding rod. When locked with bolts, this further enhances the structural stability after the connecting rod length adjustment, preventing the sliding rod from sliding on its own due to factors such as shield machine vibration. This ensures that the spacing between the flushing pipes remains within the preset range, allowing for continuous and efficient flushing and cleaning of the mud gate area.

[0011] Preferably, the sleeve is a square tube; several pointed protrusions are provided on the opposite two sides of the square tube; the slide rod is a quadrangular prism. The pointed protrusions can further break up some of the gravel, reducing the volume of gravel passing through the mud gate.

[0012] Preferably, the casing is a triangular prism shell; the sliding rod is a triangular prism. The design of the casing and the sliding rod using a triangular prism shell utilizes the three planes of the prism to form a stable surface contact constraint, effectively limiting the circumferential rotation of the sliding rod within the casing. This ensures that it slides only axially to adjust the connecting rod length, preventing the scouring pipe angle from deviating from the preset position due to rotation, thus affecting the scouring effect. The symmetry of the triangular prism structure ensures uniform stress distribution when bearing the installation load of the scouring pipe. Combined with bolt locking, this significantly improves the overall vibration resistance of the connecting rod, preventing the sliding rod from loosening or shifting due to tunnel boring machine vibration. The edges of the triangular prism can further cut the gravel, reducing the volume of gravel passing through the mud gate.

[0013] Preferably, the connector includes a flat plate and side plates vertically disposed at both ends of the flat plate; threaded holes are provided on the side plates; and two bolts are threaded into the threaded holes.

[0014] Preferably, the space enclosed by the two side plates and the flat plate is oriented towards the mud gate. This prevents the connection from loosening due to the erosion of the connector by gravel and mudflows, ensuring a firm connection between the connector and the flushing pipe.

[0015] Preferably, the connector includes two opposing semicircular ring plates; one semicircular ring plate of the connector is fixedly connected to the sleeve, and the other semicircular ring plate of the connector is fixedly connected to the slide rod. The connector uses two opposing semicircular ring plates, which respectively fix the sleeve and slide rod. The arc-shaped structure of the semicircular ring plates forms a ring-like clamping effect on the flushing pipe. The arc surface fits against the outer wall of the flushing pipe, evenly distributing installation stress and avoiding damage caused by localized stress concentration in the flushing pipe due to rigid connection. The opposing arrangement of the semicircular ring plates facilitates quick assembly and disassembly of the flushing pipe. After being fixed with bolts or clips, the connection stability between the flushing pipe and the connecting rod is ensured.

[0016] Preferably, connecting plates are provided at both ends of the semicircular ring plate; the connecting plates have through holes, and bolts are installed in the through holes. The connecting plates with through holes and bolts at both ends of the semicircular ring plate allow for the fastening of two opposing semicircular ring plates together, forming a ring-shaped fixing structure for the flushing pipe. The bolt connection facilitates quick assembly and disassembly of the flushing pipe, and during maintenance, the connecting plates can be quickly removed to replace or adjust the position of the flushing pipe. The combination of the through holes and bolts allows for adjustment of the clamping force of the semicircular ring plate on the flushing pipe, ensuring stable installation of flushing pipes of different diameters. The connecting plates enhance the overall integrity of the semicircular ring plate connection, distributing the clamping force evenly on the outer wall of the flushing pipe, preventing localized compression and deformation. Simultaneously, the tightening effect of the bolts effectively resists the reaction force of the flushing water flow, preventing the flushing pipe from loosening or shifting, ensuring it always maintains the preset spray angle and position, and continuously and efficiently flushing and cleaning the mud gate area.

[0017] As can be seen from the above technical solution, the advantages of this utility model include: the shield machine mud gate fence has two flushing pipes installed on the inner wall of the shield machine shell between the crusher and the mud gate, and the two pipes are connected by a crossbar. The flushing pipes can spray high-pressure water to directionally flush the crushed stone and mud after crushing by the crusher, avoiding the accumulation of crushed stone and blockage of the mud gate flow channel; the crossbar can enhance the stability of the flushing pipe installation structure, ensure the accuracy of the flushing position, and, together with the preliminary crushing function of the crusher, effectively reduce the probability of large-diameter crushed stone entering the mud gate, improve the mud flow efficiency, reduce the risk of failure of the mud gate due to flushing wear and crushed stone blockage, and ensure the mud pressure balance and excavation face safety during the shield machine tunneling process. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the flushing pipe and crossbar in Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the crossbar structure in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the flushing pipe and crossbar in Embodiment 2 of this utility model;

[0023] Figure 5This is a schematic diagram of the flushing pipe and crossbar in Embodiment 3 of this utility model;

[0024] Figure 6 This is a schematic diagram of the flushing pipe and crossbar in Embodiment 4 of this utility model;

[0025] Figure 7 This is a schematic diagram of the flushing pipe and crossbar in Embodiment 5 of this utility model.

[0026] Explanation of reference numerals in the attached diagram: 1-partition plate, 2-mud door, 3-stone crusher, 4-flushing pipe, 5-tunnel boring machine shell, 6-crossbar;

[0027] 601-Connecting rod, 602-Connector; 6011-Sleeve, 6012-Slide rod, 6013-Bolt 1, 6014-Pointed protrusion; 6021-Flat plate, 6022-Side plate, 6023-Bolt 2, 6024-Semi-circular ring plate, 6025-Connecting plate. Detailed Implementation

[0028] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0029] Example 1

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a mud gate fence for a tunnel boring machine includes a partition 1 for separating a mud chamber and an air cushion chamber. A mud gate 2 is provided on the partition 1. A stone crusher 3 is installed in front of the mud gate 2. The stone crusher 3 is installed inside the mud chamber. Two flushing pipes 4 are provided between the stone crusher 3 and the mud gate 2. The flushing pipes 4 are installed on the inner walls of the tunnel boring machine shell 5 on both sides of the stone crusher 3. A crossbar 6 connects the two flushing pipes 4.

[0031] The shield tunneling machine's mud gate barrier uses two flushing pipes 4 installed on the inner wall of the shield machine casing 5 between the crusher 3 and the mud gate 2, with a crossbar 6 connecting the two pipes. High-pressure water jets can be sprayed from the flushing pipes 4 to directionally flush the crushed stone and mud from the crusher 3, preventing the accumulation of crushed stone from clogging the mud gate 2's flow channel. The crossbar 6 enhances the stability of the flushing pipe 4's installation structure, ensuring precise flushing positioning. Combined with the initial crushing function of the crusher 3, it effectively reduces the probability of large-diameter crushed stone entering the mud gate 2, improves mud flow efficiency, reduces the risk of malfunctions in the mud gate 2 due to flushing wear and crushed stone blockage, and ensures mud pressure balance and excavation face safety during shield tunneling.

[0032] In the above configuration, the crossbar 6 includes a connecting rod 601 and connectors 602 fixedly installed at both ends of the connecting rod 601; the connectors 602 connect to the flushing pipe 4. The crossbar 6 adopts a structural design of connecting rod 601 and connectors 602 at both ends. The connecting rod 601 and the flushing pipe 4 are firmly connected by the connectors 602, which can form a rigid support structure, enhance the installation stability between the two flushing pipes 4, and prevent the flushing pipe 4 from shifting or loosening due to shield machine vibration or the reaction force of high-pressure flushing water flow. This ensures that the flushing pipe 4 always maintains the preset spray angle and spacing, so that the high-pressure water flow flushes the area between the crusher 3 and the mud gate 2 more evenly and accurately, continuously and effectively removing crushed stone accumulation and mud adhesion, improving flushing efficiency, extending the service life of the flushing pipe 4 and related components, and ensuring the unobstructed flow of the mud gate 2 area and the reliability of equipment operation.

[0033] Example 2

[0034] like Figure 4 As shown, based on Embodiment 1, the connecting rod 601 includes a sleeve 6011 and a sliding rod 6012; the sliding rod 6012 is slidably disposed within the sleeve 6011; the sleeve 6011 and the sliding rod 6012 are provided with several through holes, and bolts 6013 are disposed in the through holes; a connector 602 is fixedly disposed at one end of the sleeve 6011; the connector 602 is fixedly disposed at the end of the sliding rod 6012 away from the sleeve 6011. The sleeve 6011 is generally in the shape of a polygonal prism shell; the sliding rod 6012 is generally in the shape of a polygonal prism.

[0035] The connecting rod 601 adopts a sliding structure of sleeve 6011 and slide rod 6012, and both are provided with several through holes with bolts 6013, so that slide rod 6012 can slide in sleeve 6011 to adjust the overall length of connecting rod 601. In this way, the distance between the two flushing pipes 4 can be flexibly adjusted according to the actual internal space layout and flushing requirements of the tunnel boring machine, so as to meet the installation and use requirements under different working conditions. During installation, by tightening bolts 6013 in the corresponding through holes, slide rod 6012 and sleeve 6011 can be locked in a suitable position to ensure a stable connection, effectively enhance the support stability of crossbar 6 on flushing pipe 4, ensure that flushing pipe 4 can play its flushing role normally, and improve the cleaning effect of mud gate 2 fence on gravel and mud. The casing 6011 and the sliding rod 6012 are both designed with a multi-faceted prism shape. The geometric constraints of the multi-faceted surfaces effectively limit the circumferential rotation of the sliding rod 6012 within the casing 6011, ensuring that the sliding rod 6012 slides only along the axial direction of the casing 6011 to adjust its length. This prevents the installation angle of the flushing pipe 4 from shifting due to rotation, which would affect the spray direction and flushing effect of the high-pressure water flow. The surface contact characteristics of the multi-faceted structure also increase the friction between the casing 6011 and the sliding rod 6012. When locked with bolt 6013, this further enhances the structural stability of the connecting rod 601 after length adjustment, preventing the sliding rod 6012 from sliding on its own due to factors such as shield machine vibration. This ensures that the spacing of the flushing pipes 4 is always kept within the preset range, allowing for continuous and efficient flushing and cleaning of the mud gate 2 area.

[0036] The connector 602 includes a flat plate 6021 and side plates 6022 vertically disposed at both ends of the flat plate 6021. Threaded holes are provided on the side plates 6022, and bolts 6023 are threaded into the threaded holes. The space enclosed by the two side plates 6022 and the flat plate 6021 faces the mud gate 2. This design prevents loosening of the connection at the connector 602 due to erosion by gravel and mudflows, ensuring a secure connection between the connector 602 and the flushing pipe 4.

[0037] Example 3

[0038] like Figure 5 As shown, based on Embodiment 2, the sleeve 6011 is a square tube; several pointed protrusions 6014 are provided on the opposite two sides of the square tube; the slide rod 6012 is a quadrangular prism. The pointed protrusions 6014 can further break up some of the gravel, reducing the volume of gravel passing through the mud gate 2.

[0039] Example 4

[0040] like Figure 6As shown, based on Embodiment 2, the sleeve 6011 is a triangular prism shell; the slide rod 6012 is a triangular prism. The design of the sleeve 6011 and the slide rod 6012 using a triangular prism shell utilizes the three planes of the triangular prism to form a stable surface contact constraint, which can effectively limit the circumferential rotation of the slide rod 6012 within the sleeve 6011, ensuring that it only slides axially to adjust the length of the connecting rod 601, and avoids the scouring pipe 4 from deviating from the preset position due to rotation, thus affecting the scouring effect; the symmetry of the triangular prism structure makes it uniformly stressed when bearing the installation load of the scouring pipe 4, and after being locked with bolt 6013, it can significantly improve the overall vibration resistance of the connecting rod 601, preventing the slide rod 6012 from loosening and shifting due to the vibration of the tunnel boring machine; the edges of the triangular prism can also further cut the gravel, reducing the volume of gravel passing through the mud gate 2.

[0041] Example 5

[0042] like Figure 7 As shown, the difference from Embodiment 2 lies in the structure of the connector 602. The connector 602 includes two opposing semicircular ring plates 6024; one of the semicircular ring plates 6024 of one connector 602 is fixedly connected to the sleeve 6011, and one of the semicircular ring plates 6024 of the other connector 602 is fixedly connected to the slide rod 6012. Connecting plates 6025 are provided at both ends of the semicircular ring plates 6024; through holes are provided in the connecting plates 6025, and bolts are installed in the through holes.

[0043] The connector 602 uses two opposing semicircular ring plates 6024 to fix the connecting sleeve 6011 and the slide rod 6012 respectively. The arc structure of the semicircular ring plates 6024 can form a ring-shaped clamping of the flushing pipe 4. The arc surface fits against the outer wall of the flushing pipe 4 to evenly distribute the installation stress and avoid damage caused by local stress concentration in the flushing pipe 4 due to rigid connection. The opposing arrangement of the semicircular ring plates 6024 facilitates quick assembly and disassembly of the flushing pipe 4. After being fixed by bolts or clips, the connection stability between the flushing pipe 4 and the connecting rod 601 can be ensured. The semicircular ring plate 6024 is equipped with connecting plates 6025 with through holes and bolts at both ends. The two opposing semicircular ring plates 6024 can be fastened together by bolts to form a ring-shaped fixing structure for the flushing pipe 4. The bolt connection method facilitates quick disassembly and assembly of the flushing pipe 4. During maintenance, the connecting plate 6025 can be quickly disassembled to replace or adjust the position of the flushing pipe 4. The cooperation between the through holes and bolts can adjust the clamping force of the semicircular ring plate 6024 on the flushing pipe 4, ensuring that flushing pipes 4 of different diameters can be installed stably. The setting of the connecting plate 6025 enhances the overall integrity of the connection of the semicircular ring plate 6024, so that the clamping force is evenly distributed on the outer wall of the flushing pipe 4, avoiding local compression deformation. At the same time, the fastening effect of the bolts can effectively resist the reaction force of the flushing water flow, prevent the flushing pipe 4 from loosening and shifting, and ensure that it always maintains the preset spray angle and position, so as to continuously and efficiently flush and clean the mud gate 2 area.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shield machine slurry gate fence, comprising a partition plate (1) for separating a slurry chamber and an air cushion chamber, a slurry gate (2) is formed on the partition plate (1), a rock breaker (3) is installed in front of the slurry gate (2), and the rock breaker (3) is installed in the slurry chamber, characterized in that, Two flushing pipes (4) are installed between the stone crusher (3) and the mud gate (2); the flushing pipes (4) are installed on the inner wall of the shield machine shell (5) on both sides of the stone crusher (3); a crossbar (6) is connected between the two flushing pipes (4).

2. The TMM gate barrier of claim 1, wherein, The crossbar (6) includes a connecting rod (601) and a connector (602) fixedly installed at both ends of the connecting rod (601); the connector (602) is connected to the flushing pipe (4).

3. The TMM gate barrier of claim 2, wherein, The connecting rod (601) includes a sleeve (6011) and a slide rod (6012); the slide rod (6012) is slidably disposed inside the sleeve (6011); the sleeve (6011) and the slide rod (6012) are provided with several through holes, and a bolt (6013) is disposed in the through holes; a connector (602) is fixedly disposed at one end of the sleeve (6011); the connector (602) is fixedly disposed at the end of the slide rod (6012) away from the sleeve (6011).

4. The TMM gate barrier of claim 3, wherein, The sleeve (6011) is in the shape of a multi-faceted prism shell; the slide rod (6012) is in the shape of a multi-faceted prism.

5. The shield tunneling machine mud gate fence according to claim 4, characterized in that, The sleeve (6011) is a square tube; several pointed protrusions (6014) are provided on the opposite two sides of the square tube; the slide rod (6012) is a quadrangular prism.

6. The TMM gate barrier of claim 4, wherein, The sleeve (6011) is a triangular prism shell; the slide rod (6012) is a triangular prism.

7. The TMM mud door barrier according to claim 5 or 6, characterized in that, The connector (602) includes a flat plate (6021) and side plates (6022) vertically disposed at both ends of the flat plate (6021); the side plates (6022) are provided with threaded holes; and bolts (6023) are provided with threads inside the threaded holes.

8. The TMM mud door barrier of claim 7, wherein, The space enclosed by the two side plates (6022) and the flat plate (6021) is set toward the mud gate (2).

9. The TMM mud door barrier according to claim 5 or 6, wherein, The connector (602) includes two opposing semicircular ring plates (6024); one of the semicircular ring plates (6024) of the connector (602) is fixedly connected to the sleeve (6011), and the other semicircular ring plate (6024) of the connector (602) is fixedly connected to the slide rod (6012).

10. The TMM mud door barrier of claim 9, wherein, The two ends of the semi-circular ring plate (6024) are provided with connecting plates (6025); the connecting plates (6025) are provided with through holes, and bolts are provided in the through holes.

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