Washing and vibrating integrated shield tunneling machine muddy water bin grating device

Abstract

The utility model provides a washing and vibrating integrated shield tunneling machine muddy water bin grating device which comprises a grating frame and a plurality of grating bars, a pipeline channel is arranged in the grating frame, a plurality of cleaning devices are connected to the pipeline channel, and the cleaning devices are arranged on the back face of the grating frame. A plurality of grid bars are horizontally arranged in the grid frame in parallel, a vibration device is arranged at one end of each grid bar, and the vibration devices are located on the back face of the grid frame. According to the embodiment of the utility model, the cleaning device and the vibrating device are arranged on the back surface of the grid, so that the influence of front slurry impact on the device is avoided, and clay, sand grains and blocky muck attached to the grid bars can be scoured and shaken off through circular cleaning of vibration shake-off and water flow scouring in the tunneling process of the shield tunneling machine, so that the working efficiency is improved. Massive clay is effectively prevented from entering a subsequent slurry discharging pipe, the blocking rate of grid bar gaps is greatly reduced, and stable operation of a slurry circulating system is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel boring machine equipment, and specifically relates to a tunnel boring machine slurry bin grid device that integrates washing and vibration, which is particularly suitable for tunnel boring machines to pass through soft silt strata rich in clay, silt and other silty sand. Background Technology

[0002] Tunnel boring machines (TBMs) are mainly classified into earth pressure balance TBMs and slurry balance TBMs based on their working method. Slurry balance TBMs rely on a slurry circulation system to establish slurry pressure balance, thereby achieving stable support for the excavation face and ensuring the safety and efficiency of construction. In the slurry circulation system, the slurry bin grid plays a crucial role in filtering and separating impurity particles. Its performance directly affects the smoothness and stability of slurry circulation, playing an irreplaceable role in maintaining the normal operation of the slurry balance TBM and ensuring construction quality and progress.

[0003] When used for subsea operations, traditional grid devices can only play a preliminary filtering role when slurry balance shield tunneling machines pass through soft silty sand strata on the seabed. As construction time increases, large chunks of clay and silt particles formed by the cutterhead will adhere to the grid bars. With the cumulative effect over time, the gaps between the grid bars will be blocked by clay, sand, or lumpy soil, making it impossible to carry out tunneling work normally. At this time, the machine must be stopped, and the impurities on the grid must be manually cleaned before tunneling can resume normally. Frequent shutdowns for maintenance will consume a lot of manpower and resources, affect tunneling efficiency, and increase construction costs. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model proposes a self-cleaning and vibration-integrated shield tunneling machine slurry tank grating device, which eliminates the need for manual grating cleaning. The solution is as follows:

[0005] A shield tunneling machine slurry tank grid device integrating washing and vibration includes a grid frame and several grid bars. The grid frame is provided with a pipeline channel, and several cleaning devices are connected to the pipeline channel. The cleaning devices are located on the back of the grid frame. Several grid bars are arranged horizontally and parallel inside the grid frame. A vibration device is provided at one end of each grid bar and is located on the back of the grid frame.

[0006] Furthermore, the cleaning device is arranged perpendicular to the grid frame; the vibration device is arranged perpendicular to the grid frame.

[0007] Furthermore, the cleaning device is configured with a fan-shaped nozzle, the spray direction of which forms an angle of 45°±15° with the plane of the grid bar, so as to spray towards the back of the grid bar and the gap between the grid bars.

[0008] Furthermore, the vibration device is arranged perpendicular to the plane where the grid bar is located, and the vibration axis of the vibration device is parallel to the length direction of the grid bar.

[0009] Furthermore, the vibration device is installed on the vertical section of the T-shaped vibration bracket, and the two ends of the horizontal section of the T-shaped vibration bracket are fixedly connected to the grid bars and the grid frame, respectively.

[0010] Furthermore, triangular reinforcing ribs are added between the T-shaped vibration support and the grid frame.

[0011] Furthermore, the triangular reinforcing ribs are installed at the upper connection between the T-shaped vibration bracket and the grid frame.

[0012] Furthermore, the vibration device employs a miniature eccentric wheel vibration motor.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] This utility model embodiment, by setting up a cleaning device and a vibration device, both located on the back of the grid, avoids the impact of frontal mud impact on the device. During the tunnel boring machine's excavation, the cyclic cleaning through vibration and water flushing can wash away and shake off the clay, sand, and lumpy soil adhering to the grid bars, effectively preventing large pieces of clay from entering the subsequent slurry discharge pipe, greatly reducing the grid bar gap blockage rate, ensuring the stable operation of the mud circulation system, improving the tunneling efficiency of the tunnel boring machine, and significantly enhancing the tunneling efficiency of the tunnel boring machine in soft silty sand strata. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of an embodiment of this utility model;

[0016] Figure 2 This is an isometric schematic diagram of the overall structure of an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of an embodiment of this utility model from the left side;

[0018] Figure 4 This is a side view of the overall structure of an embodiment of the present utility model;

[0019] Figure 5 yes Figure 4 A magnified view of the upper right corner;

[0020] Figure 6 This is a schematic diagram of the installation position of the T-shaped bracket and the vibration device according to an embodiment of the present invention.

[0021] In the above figures: 1. Cleaning device; 2. Pipeline channel; 3. Triangular reinforcing rib; 4. T-shaped vibration support; 5. Vibration device; 6. Grid frame; 7. Grid bar; 401. Horizontal section of T-shaped vibration support; 402. Vertical section of T-shaped vibration support. Detailed Implementation

[0022] To facilitate understanding of this utility model by those skilled in the art, the specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0023] like Figures 1-6 As shown, this utility model provides a shield machine grid device that integrates washing and vibration, including a grid frame 6 and grid bars 7. The grid frame 6 has a reserved pipeline channel 2 around its circumference, and the grid bars 7 are arranged horizontally and parallel.

[0024] Several cleaning devices 1 are arranged at intervals on the back of the grid frame 6, and the cleaning devices 1 are connected to the pipeline channel 2.

[0025] A vibration device 5 is provided at one end of the grid bar 7, and the vibration device 5 is located on the back of the grid frame 6.

[0026] A shield machine grid device integrating washing and vibration also includes a T-shaped vibration support 4. The T-shaped vibration support 4 includes a horizontal section and a vertical section. A vibration device 5 is installed on the vertical section of the T-shaped vibration support. The two ends of the horizontal section of the T-shaped vibration support are fixedly connected to the grid bars 7 and the grid frame 6, respectively.

[0027] Vibration device 5 uses a miniature eccentric wheel vibration motor with a rated power of 10-50W and a vibration frequency of 50-150Hz. Resonance should be avoided.

[0028] The vibration axis of the vibration device 5 is kept parallel to the length direction of the grid bar 7 to ensure that the vibration energy is transmitted evenly along the length direction of the grid bar.

[0029] This integrated washing and vibration shield machine grid device adds a washing device 1 and a vibration device 5 compared to traditional grids. Both devices are placed on the back of the grid, effectively avoiding the impact of mud on the device.

[0030] This grid device is placed in front of the slurry discharge pipe. During the tunneling process of the tunnel boring machine, the slurry mixture cut by the cutterhead passes through this grid before entering the slurry discharge pipe. The vibration device 5 of the grid causes the grid bars 7 to vibrate, loosening and peeling off the attached materials. Simultaneously, the cleaning devices 1 located on the back of the grid frame 6 are activated, forming a circumferential flushing water flow to peel off the loosened clay and silt particles. The two devices operate alternately periodically, first vibrating and then flushing, with intelligent switching, ensuring stable circulation of the slurry in the chamber and effectively avoiding flow reduction or pressure imbalance caused by blockage. It is mainly suitable for tunnel boring machines traversing soft silt strata rich in clay, silt, and other weak silt.

[0031] Specifically, the cleaning device uses fan-shaped nozzles, with the nozzle spray direction forming a 45°±15° angle with the plane of the grid bars, preferably 45°, to ensure that the water flow can cover the back side of the grid bars and the gaps between adjacent grid bars. The nozzles are distributed in a matrix around the back side of the grid frame 6, forming a surrounding flushing area. At the same time, a high-pressure water pump provides water pressure of 0.3-0.8MPa, the nozzle outlet diameter can be selected from 2-4mm, and the single nozzle flow rate can be selected from 5-15L / min, ensuring that the water flow can strip away clay particles.

[0032] The cleaning device 1 is installed perpendicular to the grid frame. The cleaning device 1 is fixed to the grid frame by M10-M16 threads. A nitrile rubber anti-vibration pad with a thickness of 3-5mm is embedded between the nozzle and the mounting base to ensure that the spray angle remains stable under vibration.

[0033] Specifically, the T-shaped vibration bracket 4 is made of stainless steel in one piece by bending, and its width and thickness are consistent with those of the grid 7. The vertical section 402 of the T-shaped vibration bracket is fixed with a micro eccentric wheel vibration motor by bolts. The surface of the motor is provided with a stainless steel protective shell with a thickness of ≥3mm. The inner wall of the shell is lined with a rubber sealing ring to prevent mud from entering the motor.

[0034] The horizontal section 401 of the T-shaped vibration bracket uses a welded grid frame 6 at one end and a welded grid bar 7 at the other end, both connected by full welding to ensure that there is no significant attenuation in vibration transmission.

[0035] Furthermore, a triangular reinforcing rib 3 is added between the T-shaped vibration support 4 and one side of the grid frame 6. The triangular reinforcing rib 3 is made of 6mm thick Q235B steel plate, forming a stable triangular support structure with the frame and support.

[0036] Furthermore, the triangular reinforcing rib 3 is welded to the upper connection between the T-shaped vibration bracket 4 and the grid frame 6. The cleaning device 1, the vertical section 402 of the T-shaped vibration bracket, and the vibration device 5 are all located on the back of the grid and are perpendicular to the plane where the grid bars 7 and the frame 6 are located.

[0037] In this embodiment, the anti-vibration pad and triangular reinforcing rib 3 are mainly for protecting the cleaning device 5 and minimizing the impact of the vibration device 5 on the spray angle. The fan-shaped nozzle device can have its nozzle height appropriately increased on the side of the grid frame 6 with the triangular reinforcing rib 3, and the spray angle adjusted so that the sprayed water flow avoids the vibration device 5 installed on the vertical section 402 of the T-shaped vibration support as much as possible. Simultaneously, a protective shell is installed on the surface of the vibration device 5 to minimize the impact of the sprayed water flow on the vibration device 5. The grid bars 7 are welded to the T-shaped vibration support 4, and the vibration shaft of the vibration device 5 is kept horizontal with the grid bars 7 to more accurately transmit vibration to the grid bars 7. This device integrates vibration and cleaning, providing good interception and filtration effects when the tunnel boring machine traverses soft silt strata rich in clay and silt, ensuring the stable operation of the mud circulation system, reducing the number of shutdowns for cleaning and maintenance, and ensuring the smooth progress of the project.

[0038] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A shield tunneling machine slurry bin grid device integrating washing and vibration, comprising a grid frame (6) and a plurality of grid bars (7), characterized in that, The grid frame (6) is provided with a pipeline channel (2), and a number of cleaning devices (1) are connected to the pipeline channel (2). The cleaning devices (1) are located on the back of the grid frame (6). A number of grid bars (7) are arranged horizontally and parallel inside the grid frame (6). A vibration device (5) is provided at one end of the grid bar (7). The vibration device (5) is located on the back of the grid frame (6).

2. The integrated washing and vibration shield machine slurry bin grid device according to claim 1, characterized in that, The cleaning device (1) is arranged perpendicularly to the grid frame (6).

3. The integrated washing and vibration shield machine slurry bin grid device according to claim 2, characterized in that, The cleaning device (1) is configured with a fan-shaped nozzle. The spray direction of the fan-shaped nozzle is at an angle of 45°±15° with the plane of the grid bar, so as to spray onto the back of the grid bar (7) and the gap between the grid bars (7).

4. The integrated washing and vibration shield machine slurry bin grid device according to claim 1, characterized in that, The vibration device (5) is set perpendicular to the plane where the grid bar (7) is located, and the vibration axis of the vibration device is parallel to the length direction of the grid bar (7).

5. The shield machine slurry bin grid device integrating washing and vibration as described in claim 4, characterized in that, The vibration device (5) is installed on the vertical section of the T-shaped vibration bracket (4), and the two ends of the horizontal section of the T-shaped vibration bracket (4) are fixedly connected to the grid strip (7) and the grid frame (6) respectively.

6. The integrated washing and vibration shield machine slurry bin grid device according to claim 5, characterized in that, A triangular reinforcing rib (3) is added between the T-shaped vibration support (4) and the grid frame (6).

7. The integrated washing and vibration shield machine slurry bin grid device according to claim 6, characterized in that, The triangular reinforcing rib (3) is set at the upper connection between the T-shaped vibration support (4) and the grid frame (6).

8. The integrated washing and vibration shield machine slurry bin grid device according to claim 4, characterized in that, The vibration device (5) adopts a miniature eccentric wheel vibration motor.

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