Cleaning device and cleaning method for shield slurry box

Abstract

The invention discloses a cleaning device and method for a shield slurry box. The cleaning device for the shield slurry box comprises a connecting assembly, a telescopic driving mechanism and a cleaning element. The connecting assembly comprises a connecting plate, the lower portion of the connecting plate is used for being fixedly connected with the side wall of the pulp box, and the upper portion of the connecting plate protrudes out of the top of the pulp box. The telescopic driving mechanism is arranged at the upper part of the connecting plate; the cleaning element is connected to the driving end of the telescopic driving mechanism, the cleaning element is used for being tightly attached to the inner wall of the pulp box, and the cleaning element can move along the inner wall of the pulp box to clean residues on the inner wall of the pulp box. The cleaning device for the shield slurry box is convenient to operate and high in safety, constructors and technicians can conveniently and accurately observe the size of slurry, then peripheral sedimentation is controlled, and the cleaning device can play an important role in working conditions such as shield crossing. And meanwhile, constructors are prevented from entering the slurry box frequently for operation, and the occurrence rate of safety accidents is reduced.

Description

Technical Field

[0001] This invention belongs to the field of shield tunneling technology, and specifically relates to a cleaning device and method for a shield tunnel slurry box. Background Technology

[0002] In existing technologies, synchronous grouting is an essential step in shield tunneling construction. Currently, the grout volume is mainly calculated by the number of grouting strokes. However, this measurement method often suffers from inaccurate counting, and the deviation is not constant. Therefore, it is still necessary to use the traditional measurement method, namely the grout tank scale, for verification. Because the grout generally contains cementitious materials such as lime and cement, the grout solidifies on the inner wall of the shield grout tank, reducing the tank volume and making it impossible to accurately measure the grout volume using the scale. Currently, this is mainly achieved through periodic manual cleaning, which not only affects the construction progress but also easily causes safety accidents.

[0003] The existing Chinese patent publication number CN216779613U discloses a technical solution for "a high-pressure flushing device for synchronous slurry tank in shield tunneling". The operation is simple, but it is difficult to clean thoroughly by simply flushing with water pipes. In addition, in order to avoid slurry dilution, the slurry tank needs to be emptied and the work needs to be stopped for cleaning, which affects the construction progress. Summary of the Invention

[0004] In order to solve several problems existing in related technologies, the present invention provides a cleaning device and cleaning method for shield tunnel slurry boxes.

[0005] The technical solution of the present invention is as follows:

[0006] A cleaning device for a tunnel boring machine's slurry tank, comprising:

[0007] A connecting assembly, the connecting assembly including a connecting plate, the lower part of the connecting plate being fixedly connected to the side wall of the pulp tank, and the upper part of the connecting plate protruding from the top of the pulp tank;

[0008] A telescopic drive mechanism is disposed on the upper part of the connecting plate;

[0009] A cleaning element is connected to the drive end of the telescopic drive mechanism. The cleaning element is used to closely adhere to the inner wall of the pulp tank and is capable of moving along the inner wall of the pulp tank to clean the residue on the inner wall of the pulp tank.

[0010] Furthermore, the lower part of the connecting plate is fixedly connected to the outer wall of the pulp tank;

[0011] The connecting assembly further includes a fastener for mounting the telescopic drive mechanism on the upper part of the connecting plate.

[0012] Furthermore, the connecting plate is a steel plate, the fastener is a single-headed bolt, and the telescopic drive mechanism is provided with a threaded hole that matches the single-headed bolt.

[0013] Furthermore, the connecting plate is connected to the outer wall of the slurry tank by welding, and the connecting plate is connected to the telescopic drive mechanism by a detachable connection.

[0014] Furthermore, the welding method is a fillet weld provided around the three sides of the edge of the connecting plate.

[0015] Furthermore, the cleaning element is a cutter, which is bolted to the drive end of the telescopic drive mechanism, and the cutter has internal threads that match the bolt; and / or,

[0016] The blade of the cutter is made of wear-resistant cemented carbide, and the surface of the blade body is covered with a wear-resistant overlay layer.

[0017] Furthermore, it also includes:

[0018] A hydraulic control assembly includes a hydraulic valve, which is connected to the telescopic drive mechanism. The hydraulic valve is controlled by an external electrical signal to open and close. When the hydraulic valve is open, the telescopic drive mechanism drives the cleaning element to extend. When the hydraulic valve is closed, the telescopic drive mechanism drives the cleaning element to retract.

[0019] Furthermore, the hydraulic control component also includes a control unit, and the external electrical signal is a current signal, which is regulated by the control unit.

[0020] Furthermore, the control unit includes a potentiometer, and the hydraulic control component sends a current signal to the hydraulic valve through the potentiometer to adjust the opening and closing of the hydraulic valve. The magnitude of the current signal controls the opening degree of the hydraulic valve, and the opening degree of the hydraulic valve is used to adjust the magnitude of the hydraulic power at the drive end of the telescopic drive mechanism.

[0021] A method for cleaning residue from the inner wall of a slurry tank, using the cleaning device for a shield tunnel slurry tank as described above, includes the following steps:

[0022] S1: The mortar level in the mortar tank drops to or below the mixing shaft;

[0023] S2: Control the extension of the drive end of the telescopic drive mechanism to push the cleaning element to move close to the inner wall of the slurry tank and scrape off the residue attached to the inner wall of the slurry tank;

[0024] S3: After cleaning is completed, control the drive end of the telescopic drive mechanism to retract, driving the cleaning element back to its initial position.

[0025] The beneficial effects of this invention are as follows:

[0026] Compared with existing technologies, the cleaning device for the shield tunnel slurry tank of the present invention uses a hydraulically controlled cutter to clean the residual material inside the slurry tank, which facilitates construction and technical personnel to accurately observe the slurry volume and thus control surrounding settlement. This is especially important in shield tunneling and other similar situations. At the same time, it avoids the need for construction personnel to frequently enter the slurry tank, reducing the incidence of safety accidents. Attached Figure Description

[0027] Figure 1 This is a cross-sectional structural diagram of the cleaning device and the slurry tank in an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the cleaning device and the slurry tank in an embodiment of the present invention;

[0029] Figure 3 This is a cross-sectional view of the cleaning device according to an embodiment of the present invention when the telescopic drive mechanism is extended.

[0030] Figure 4 This is a cross-sectional schematic diagram of the telescopic drive mechanism of the cleaning device according to an embodiment of the present invention when it is extended;

[0031] Figure 5 This is a cross-sectional view of the telescopic drive mechanism of the cleaning device according to an embodiment of the present invention when it is retracted.

[0032] Figure 6 This is a cross-sectional view of the telescopic drive mechanism of the cleaning device according to an embodiment of the present invention when it is retracted.

[0033] Figure 7 This is an enlarged schematic diagram of the installation node of the cleaning device according to an embodiment of the present invention;

[0034] Figure 8 This is an enlarged schematic diagram of the connection between the connecting plate and the outer wall of the slurry tank of the cleaning device according to an embodiment of the present invention.

[0035] In the diagram: 1. Telescopic drive mechanism; 2. Cleaning element; 3. Bolt; 41. Connecting plate; 42. Single-headed bolt; 51. Outer wall of the slurry tank; 52. Inner wall of the slurry tank; 53. Agitator shaft; 6. Residue. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a direct connection, or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The following describes a cleaning device for a tunnel boring machine's slurry tank according to the present invention.

[0039] refer to Figures 1 to 8 The cleaning device for a shield tunnel slurry box provided in this embodiment mainly includes a connecting component, a telescopic drive mechanism 1, and a cleaning element 2.

[0040] refer to Figure 1 and Figure 7 In one embodiment, the connecting assembly includes a connecting plate 41, preferably a steel plate, having opposing upper and lower portions, the lower portion of the connecting plate 41 being fixedly connected to the outer wall 51 of the pulp tank, and the upper portion of the connecting plate 41 protruding from the top of the pulp tank.

[0041] The telescopic drive mechanism 1 is preferably a multi-stage telescopic structure with pre-machined internal thread holes, and the telescopic drive structure 1 is disposed on the upper part of the connecting plate 41.

[0042] The cleaning element 2 is connected to the drive end of the telescopic drive mechanism 1. The cleaning element 2 is in close contact with the inner wall 52 of the pulp tank, and the cleaning element 2 can move along the inner wall 52 of the pulp tank to clean the residue 6 on the inner wall 52 of the pulp tank.

[0043] Specifically, during the installation of the connecting assembly, the installation position of the connecting plate 41 is determined according to the dimensions of the outer wall 51 of the pulp tank and the cleaning location, ensuring sufficient space at the top for installing the telescopic drive mechanism 1. Next, the installation area of ​​the outer wall 51 of the pulp tank is cleaned, the lower part of the connecting plate 41 is attached to the outer wall 51 of the pulp tank, and fillet welds are applied along the three edges of the connecting plate 41 using shielded metal arc welding to achieve a robust welded connection. This three-sided welded structure can withstand the reaction force and vibration during the cleaning operation.

[0044] The telescopic drive mechanism 1 is the core component that provides linear power. The telescopic drive mechanism 1 is located on the upper part of the connecting plate 41, preferably using fasteners to achieve a detachable connection. This configuration allows the power of the telescopic drive mechanism 1 to be completely externalized.

[0045] The cleaning element 2 has a contour that adapts to the flat surface of the inner wall 52 of the pulp tank, can fit tightly against the inner wall 52 of the pulp tank, and moves linearly along the inner wall 52 of the pulp tank during operation.

[0046] Based on the basic device consisting of the aforementioned connecting components, telescopic drive mechanism 1, and cleaning element 2, the telescopic drive mechanism 1 pushes the cleaning element 2 to move, achieving mechanical scraping cleaning. Furthermore, since the entire drive mechanism and connecting components are installed outside the slurry tank, no construction personnel need to enter the slurry tank during cleaning, ensuring their safety. At the same time, the external nature of the connecting plate 41 makes it more convenient to handle internal installations.

[0047] In one embodiment, the connecting assembly further includes a fastener, preferably a single-ended bolt 42, which is used to mount the telescopic drive mechanism 1 on the upper part of the connecting plate 41, and the telescopic drive mechanism 1 is provided with a threaded hole that matches the single-ended bolt 42.

[0048] Specifically, the single-headed bolt 42 is screwed into the threaded hole of the telescopic drive mechanism 1 through the through hole at the top of the connecting plate 41, thus securing it to the top of the connecting plate 41. This single-headed bolt 42 connection method achieves a detachable connection.

[0049] In one embodiment, the cleaning element 2 is a cutter, which can be long and narrow. The long cutter can move along the entire inner wall surface of the slurry tank 52 for more thorough scraping. The cutter is connected to the drive end of the telescopic drive mechanism 1 by bolts 3. The cutter can be driven by the drive ends of multiple telescopic drive mechanisms 1. The cutter has internal threads that match the bolts 3. The above method facilitates the installation and replacement of the cutter.

[0050] Specifically, the cutting edge of the cutter is made of wear-resistant cemented carbide, which has extremely high hardness and wear resistance. The blade body of the cutter has a wear-resistant layer formed by welding a layer of wear-resistant welding rod on its surface to extend the overall service life and adapt to the strong abrasion of cement mortar.

[0051] In one embodiment, the cleaning device further includes a hydraulic control component (not shown), which includes a hydraulic valve. The hydraulic control component is connected to the telescopic drive mechanism 1. The hydraulic valve is controlled by an external electrical signal to open and close. When the hydraulic valve is open, the telescopic drive mechanism 1 drives the cleaning element 2 to extend. When the hydraulic valve is closed, the telescopic drive mechanism 1 drives the cleaning element 2 to retract.

[0052] The hydraulic control assembly also includes a control unit (not shown), which preferably includes a potentiometer.

[0053] Specifically, the external electrical signal is a current signal, which is regulated by the control unit. The hydraulic control component sends a current signal to the hydraulic valve via a potentiometer to regulate the opening and closing of the hydraulic valve. The magnitude of the current signal controls the opening degree of the hydraulic valve, which in turn regulates the hydraulic power at the drive end of the telescopic drive mechanism 1. The hydraulic control component enables remote and precise control, allowing the operator to adjust the cleaning force in real time based on the thickness and hardness of the residue 6, avoiding insufficient force for incomplete cleaning or excessive force that could damage the inner wall 52 of the slurry tank.

[0054] This invention also provides a method for cleaning the residue 6 on the inner wall 52 of the slurry tank, including steps S1-S3.

[0055] Step S1: The mortar level in the mortar tank drops to or below the stirring shaft 53.

[0056] Specifically, after the tunnel boring machine completes one ring of its advance, the synchronous grouting system stops pumping. At this time, the mortar level in the grout tank will gradually decrease due to consumption. Construction personnel will observe the mortar level and wait for it to drop to or below the mixing shaft 53.

[0057] In step S1, the mortar level dropping to or below the mixing shaft 53 provides space for the downward movement of the cutter, preventing the mortar from being agitated. The exposed mixing shaft 53 serves as a clear visual reference point, facilitating the judgment of the mortar level and ensuring safety. Furthermore, cleaning is carried out during construction breaks, without affecting normal shield tunneling and grouting cycles, resulting in high construction efficiency.

[0058] Step S2: Control the extension of the drive end of the telescopic drive mechanism 1, thereby pushing the cleaning element 2 to move close to the inner wall 52 of the pulp tank and scrape off the residue 6 attached to the inner wall 52 of the pulp tank.

[0059] Specifically, the construction personnel control the potentiometer of the cleaning device to send a current signal. The hydraulic control component receives the signal and drives the drive end of the telescopic drive mechanism 1 to extend, thereby pushing the cutter to move close to the inner wall 52 of the slurry tank and scrape off the residue 6 attached to the inner wall 52 of the slurry tank.

[0060] In step S2, the entire cleaning process is completed in an external control room, completely eliminating the possibility of personnel entering the hazardous area. Secondly, the hydraulic valves are adjusted via a potentiometer to flexibly adapt to residues of varying hardness and adhesion. Newly adhered soft deposits can be quickly and lightly scraped, while old, hard deposits can be removed slowly with increased pressure, achieving a more intelligent and effective cleaning method than manual cleaning. Finally, the cutter moves closely along the inner wall, creating a neat cleaning trajectory that covers most of the sidewall of the slurry tank.

[0061] Step S3: After cleaning is completed, control the drive end of the telescopic drive mechanism 1 to retract, driving the cleaning element 2 back to its initial position.

[0062] Specifically, observe the cleaning effect. After the cutter confirms that the cleaning is clean, the construction personnel adjust the potentiometer, close the hydraulic valve, and drive the drive end of the telescopic drive mechanism 1 to retract, thereby driving the cleaning element 2 back to its initial position.

[0063] In step S3, if the telescopic drive mechanism 1 experiences a malfunction such as jamming, maintenance personnel do not need to damage the slurry tank structure. They only need to remove the single-headed bolt 42 used for connection and remove the entire telescopic drive mechanism 1 from the connecting plate 41 for repair. The repair process is quick and has minimal impact on construction.

[0064] Through the above methods, the functions of each part of the present invention are clearly defined and work synergistically. By combining the telescopic drive mechanism 1 with the cutter and using hydraulic control components, a highly efficient, safe, and easy-to-maintain cleaning device for the inner wall 52 of the slurry tank is constructed. The cleaning device uses a hydraulically controlled cutter to clean the residue 6 from the inner wall 52 of the shield tunnel slurry tank, effectively solving the problem of slurry tank cleaning during shield tunneling, especially playing a crucial role in shield tunneling operations. Simultaneously, the cleaning device avoids frequent entry of construction personnel into the slurry tank, reducing the accident rate.

[0065] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A cleaning device for a shield tunnel slurry box, characterized in that, include: A connecting assembly, the connecting assembly including a connecting plate, the lower part of the connecting plate being fixedly connected to the side wall of the pulp tank, and the upper part of the connecting plate protruding from the top of the pulp tank; A telescopic drive mechanism is disposed on the upper part of the connecting plate; A cleaning element is connected to the drive end of the telescopic drive mechanism. The cleaning element is used to closely adhere to the inner wall of the pulp tank and is capable of moving along the inner wall of the pulp tank to clean the residue on the inner wall of the pulp tank.

2. The cleaning device for a shield tunnel slurry tank according to claim 1, characterized in that, The lower part of the connecting plate is fixedly connected to the outer wall of the slurry tank; The connecting assembly further includes a fastener for mounting the telescopic drive mechanism on the upper part of the connecting plate.

3. A cleaning device for a shield tunnel slurry tank according to claim 2, characterized in that, The connecting plate is a steel plate, the fastener is a single-headed bolt, and the telescopic drive mechanism is provided with a threaded hole that matches the single-headed bolt.

4. A cleaning device for a shield tunnel slurry tank according to claim 2, characterized in that, The connecting plate is welded to the outer wall of the slurry tank, and the connecting plate is detachably connected to the telescopic drive mechanism.

5. A cleaning device for a shield tunnel slurry tank according to claim 4, characterized in that, The welding method is a fillet weld set around the three sides of the edge of the connecting plate.

6. A cleaning device for a shield tunnel slurry tank according to claim 1, characterized in that, The cleaning element is a cutter, which is bolted to the drive end of the telescopic drive mechanism. The cutter has internal threads that match the bolts; and / or, The blade of the cutter is made of wear-resistant cemented carbide, and the surface of the blade body is covered with a wear-resistant overlay layer.

7. A cleaning device for a shield tunnel slurry tank according to claim 1, characterized in that, Also includes: A hydraulic control assembly includes a hydraulic valve, which is connected to the telescopic drive mechanism. The hydraulic valve is controlled by an external electrical signal to open and close. When the hydraulic valve is open, the telescopic drive mechanism drives the cleaning element to extend. When the hydraulic valve is closed, the telescopic drive mechanism drives the cleaning element to retract.

8. A cleaning device for a shield tunnel slurry tank according to claim 7, characterized in that, The hydraulic control component also includes a control unit, and the external electrical signal is a current signal, which is regulated by the control unit.

9. A cleaning device for a shield tunnel slurry tank according to claim 8, characterized in that, The control unit includes a potentiometer. The hydraulic control component sends a current signal to the hydraulic valve through the potentiometer to adjust the opening and closing of the hydraulic valve. The magnitude of the current signal controls the opening degree of the hydraulic valve, and the opening degree of the hydraulic valve is used to adjust the magnitude of the hydraulic power at the drive end of the telescopic drive mechanism.

10. A method for cleaning residue from the inner wall of a slurry tank, using the cleaning device for a shield tunnel slurry tank as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The mortar level in the mortar tank drops to or below the mixing shaft; S2: Control the extension of the drive end of the telescopic drive mechanism to push the cleaning element to move close to the inner wall of the slurry tank and scrape off the residue attached to the inner wall of the slurry tank; S3: After cleaning is completed, control the drive end of the telescopic drive mechanism to retract, driving the cleaning element back to its initial position.

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