Shield tail brush device and shield tunneling machine comprising same

Abstract

The invention provides a shield tail brush device and a shield tunneling machine comprising the same, and belongs to the technical field of shield tunneling machines. Comprising a plurality of shield tail brushes arranged at intervals, steel plate bundles arranged on one sides of the shield tail brushes, abrasion detection assemblies and sealing structures arranged between every two adjacent shield tail brushes. The shield tail brushes are all connected with the shield tunneling machine body, the steel plate bundle is connected with the shield tunneling machine body, and the abrasion detection assemblies correspond to the shield tail brushes in a one-to-one mode. The sealing structure comprises a grease cavity and a pressure detection assembly arranged in the grease cavity, and the pressure detection assembly is used for detecting the grease pressure in the grease cavity in real time. The wear detection assembly is arranged to monitor the wear condition of the shield tail brush in real time, so that the shield tail brush plays a maximum role in construction, the replacement frequency is reduced, and the construction cost is saved; meanwhile, the pressure detection assembly is arranged in the grease cavity so as to monitor the oil pressure condition in the grease cavity of the shield tail brush in real time, and abnormal abrasion of the shield tail brush caused by too low oil pressure is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of shield machines and relates to a shield tail brush device and a shield machine comprising the same. Background Art

[0002] With the continuous development of shield construction technology, the challenges faced by shield tunnel construction are also constantly increasing. At present, shield machine construction is developing in the direction of large diameter, long distance and high environmental pressure, and the risks that may exist in construction should not be underestimated. The shield tail sealing system is one of the key systems to ensure the safe excavation of the shield machine, and the sealing ability of the shield tail sealing brush determines whether the shield tail sealing system can work reliably. However, since the shield tail brush is an irregular replacement part, wear is one of the main reasons for the failure of the shield tail sealing brush. It is easy to wear and collapse during shield construction. Especially when the grease is not fully injected, the shield posture deviates from the set route or the tunnel is excavated with a small turn, the shield tail brush often suffers from sharp wear or permanent deformation failure. If the damaged position of the shield tail brush cannot be found in time, water leakage and slurry leakage will occur at the least, affecting the construction safety and progress, and even causing soil collapse, and even machine destruction and death and other safety accidents.

[0003] Therefore, how to provide a new shield tail brush to improve the sealing performance and ensure construction safety is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The invention provides a shield tail brush device capable of monitoring the grease chamber pressure and the wear condition of the shield tail brush in real time and a shield machine comprising the same.

[0005] The present invention provides a shield tail brush device, which is arranged at the tail of a shield machine body, and comprises a plurality of shield tail brushes arranged at intervals from each other, a steel plate bundle arranged on one side of the shield tail brush, a wear detection component for detecting the wear of the shield tail brush, and a sealing structure arranged between two adjacent shield tail brushes;

[0006] The plurality of shield tail brushes are all connected to the shield machine body, the steel plate bundle is connected to the shield machine body, the wear detection assembly is provided with a plurality of pieces corresponding to the plurality of shield tail brushes, and a single wear detection assembly is installed on a single shield tail brush;

[0007] The sealing structure comprises a grease cavity and a pressure detection component arranged in the grease cavity, and the pressure detection component is used for performing real-time detection of the grease pressure in the grease cavity.

[0008] Furthermore, the shield tail brush comprises a cover plate, a bottom plate, a spring plate assembly and an intermediate brush wire layer;

[0009] The bottom plate is installed on the shield machine body;

[0010] One end of the cover plate is connected to the bottom plate, and the other end is bent to wrap the spring plate assembly and fixed to the outside of the spring plate assembly;

[0011] The spring plate assembly is arranged on the bottom plate, and the spring plate assembly includes a first layer of spring bending plates, a second layer of spring bending plates, an intermediate layer of spring bending plates and a bottom layer of spring bending plates which are sequentially stacked from close to the bottom plate to far away from the bottom plate;

[0012] The middle brush wire layer is arranged between the second layer of spring bending plate and the bottom layer of spring bending plate;

[0013] The wear detection component is arranged between the first layer of spring bending plate and the second layer of spring bending plate and is fixedly connected to the second layer of spring bending plate.

[0014] Furthermore, the first layer of spring bending plate includes a first horizontal section and a first inclined section which are integrally formed;

[0015] The second layer of spring bending plate includes a second horizontal section and a second inclined section which are integrally formed;

[0016] The middle layer spring bending plate includes a third horizontal section and a third inclined section which are integrally formed;

[0017] The bottom spring bending plate includes a fourth horizontal section and a fourth inclined section which are integrally formed;

[0018] The first horizontal section is connected to the bottom plate, the second horizontal section, the third horizontal section and the fourth horizontal section are sequentially stacked on the first horizontal section, and the cover plate is arranged on the fourth horizontal section;

[0019] The first inclined section, the second inclined section, the third inclined section and the fourth inclined section are stacked in sequence, and the length of the first inclined section, the length of the second inclined section, the length of the third inclined section and the length of the fourth inclined section are arranged in sequence from small to large.

[0020] Furthermore, a plurality of brushes made of steel wires are provided on the outer surface of the middle brush wire layer.

[0021] Further, the wear detection assembly includes a control circuit, a first detection element, a second detection element, a first connection circuit and a second connection circuit;

[0022] The first detection element and the second detection element are arranged side by side with each other in the horizontal direction, and the vertical height of the first detection element is lower than the vertical height of the second detection element;

[0023] The first connecting circuit connects the first detection element and the control circuit, and the second connecting circuit connects the second detection element and the control circuit.

[0024] Further, the shield tail brush comprises a first shield tail brush, a second shield tail brush, a third shield tail brush and a fourth shield tail brush which are sequentially arranged at intervals from each other;

[0025] The grease chamber is configured as an annular structure, and the grease chamber includes a first annular grease chamber respectively disposed between the first shield tail brush and the second shield tail brush, a second annular grease chamber disposed between the second shield tail brush and the third shield tail brush, a third annular grease chamber between the third shield tail brush and the fourth shield tail brush, and a fourth annular grease chamber between the fourth shield tail brush and the steel plate bundle;

[0026] The pressure detection assembly includes a first pressure sensor disposed in a first annular grease cavity, a second pressure sensor disposed in a second annular grease cavity, a third pressure sensor disposed in a third annular grease cavity, and a fourth pressure sensor disposed in a fourth annular grease cavity.

[0027] Further, the first pressure sensor, the second pressure sensor, the third pressure sensor and the fourth pressure sensor are each provided with four pieces;

[0028] Four first pressure sensors are respectively arranged at the nodes of the central axis of the cross section of the first annular grease chamber;

[0029] The four second pressure sensors are arranged at an angle of 45° to the central axis of the cross section of the second annular grease chamber;

[0030] The four third pressure sensors are arranged at an angle of 30° to the vertical center axis of the cross section of the third annular grease chamber;

[0031] The four fourth pressure sensors are arranged at an angle of 30° to the horizontal central axis of the cross section of the fourth annular grease chamber.

[0032] Furthermore, the steel plate bundle is configured as a hook structure; and the steel plate bundle comprises a bottom spring bending plate of the steel plate bundle, a top spring bending plate of the steel plate bundle, a steel plate bundle pressure plate and a steel plate bundle bottom plate;

[0033] The steel plate bundle bottom plate is fixedly connected to the shield machine body, and a steel wire bundle layer, a steel plate bundle top spring bending plate and a steel plate bundle pressure plate are arranged in sequence from bottom to top on the steel plate bundle bottom plate, and the steel plate bundle bottom plate, the steel wire bundle layer, the steel plate bundle top spring bending plate and the steel plate bundle pressure plate are fixedly connected to each other.

[0034] Furthermore, the shield tail brush device also includes a grease pipe and a polyurethane emergency injection pipe arranged at the tail of the shield machine body;

[0035] The grease pipe connects the grease chamber and an external grease pump and is used to pump grease into the grease chamber;

[0036] The polyurethane emergency injection pipe connects the grease cavity and an external polyurethane pump and is used to pump polyurethane into the grease cavity when slurry leakage and / or liquid leakage occurs in the grease cavity.

[0037] The present invention also provides a shield machine, comprising a shield machine body and the shield tail brush device as described above.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] A shield tail brush device provided by the present invention is provided with a wear detection component to monitor the wear condition of the shield tail brush in real time, so that the shield tail brush can play a maximum role in construction, reduce the replacement frequency, and save construction costs; at the same time, a pressure detection component is provided in the grease chamber to monitor the oil pressure in the grease chamber of the shield tail brush in real time, thereby avoiding excessively low oil pressure and causing abnormal wear of the shield tail brush.

[0040] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0042] Figure 1 is a schematic diagram of a partial structural cross-section of a shield machine according to an embodiment of the present invention;

[0043] Figure 2 yes Figure 1 Schematic diagram of the layout of the medium grease pipe and polyurethane emergency injection pipe;

[0044] Figure 3 yes Figure 1 Schematic diagram of the layout of the pressure detection components;

[0045] Figure 4(a) is Figure 3 A schematic diagram of the arrangement points of the first pressure sensor;

[0046] Figure 4(b) is Figure 3 A schematic diagram of the arrangement points of the second pressure sensor;

[0047] Figure 4(c) is Figure 3 A schematic diagram of the arrangement point of the third pressure sensor;

[0048] Figure 4(d) is Figure 3 A schematic diagram of the arrangement point of the fourth pressure sensor;

[0049] Figure 5 yes Figure 1 Schematic diagram of the cross-sectional structure of the first shield tail brush;

[0050] Figure 6 yes Figure 5 The partial enlarged schematic diagram of point Ⅰ in the middle;

[0051] Figure 7 yes Figure 6 A schematic diagram of the structure of the wear detection component;

[0052] Figure 8 yes Figure 1 Schematic diagram of the structure of the steel plate bundle.

[0053] in:

[0054] 01. Shield machine body, 1. First shield tail brush, 1.1. Cover plate, 1.2. Bottom plate, 1.3. Middle layer spring bending plate, 1.4. Bottom layer spring bending plate, 1.5. Middle brush wire layer, 1.6. First layer spring bending plate, 1.7. Second layer spring bending plate, 1.8. Wear detection assembly, 1.8.1. First detection element, 1.8.2. Second detection element, 1.8.3. First connection circuit, 1.8.4. Second connection circuit, 1.8.5. Terminal block, 2. Second shield tail brush, 3. Third shield tail Brush, 4. Fourth shield tail brush, 5. Steel plate bundle, 5.1. Bottom spring bending plate of steel plate bundle, 5.2. Top spring bending plate of steel plate bundle, 5.3. Steel plate bundle pressure plate, 5.4. Bottom plate of steel plate bundle, 5.5. Stud, 6. Pipe segment, 7. Pressure detection assembly, 7.1. First pressure sensor, 7.2. Second pressure sensor, 7.3. Third pressure sensor, 7.4. Fourth pressure sensor, 8. Grease polyurethane injection structure, 8.1. Grease pipe, 8.2. Polyurethane emergency injection pipe, 9. Grease cavity, 10. Stop plate. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned purposes, features and advantages of the present invention more clear and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings of the present invention are all simplified and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the implementation of the present invention; the "number" mentioned in the present invention is not limited to the specific number in the examples in the accompanying drawings; the directions or positional relationships indicated by "front", "middle", "back", "left", "right", "up", "down", "top", "bottom", "middle", etc. mentioned in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor can they be understood as limitations on the present invention.

[0056] Example:

[0057] See also Figures 1 to 3As shown, a shield machine provided by the present invention comprises a shield machine body 01 and a shield tail brush device, a steel plate bundle 5 and a slurry stop plate 10 arranged on the shield machine body 01;

[0058] The shield tail brush device is arranged at the rear of the shield machine body 01, and the shield tail brush device includes a first shield tail brush 1, a second shield tail brush 2, a third shield tail brush 3, a fourth shield tail brush 4, a steel plate bundle 5 and a sealing structure; the first shield tail brush 1, the second shield tail brush 2, the third shield tail brush 3, the fourth shield tail brush 4 and the steel plate bundle 5 are arranged in sequence and spaced from each other, the first shield tail brush 1 and the second shield tail brush 2 are both connected to the shield machine body 01 in a detachable manner, and the first shield tail brush 1 and the second shield tail brush 2 are both arranged in close contact with the outer wall of the lined pipe segment 6; the third shield tail brush 3 and the fourth shield tail brush 4 are arranged in a detachable manner. The shield tail brushes 4 are fixedly connected to the shield machine body 01 by welding, and the third shield tail brush 3 and the fourth shield tail brush 4 are arranged in close contact with the outer wall of the lined segment 6; the sealing structure includes an annular grease cavity 9 for sealing by injecting grease, and the annular grease cavity 9 includes a first annular grease cavity arranged between the first shield tail brush 1 and the second shield tail brush 2, a second annular grease cavity arranged between the second shield tail brush 2 and the third shield tail brush 3, a third annular grease cavity between the third shield tail brush 3 and the fourth shield tail brush 4, and a fourth annular grease cavity between the fourth shield tail brush 4 and the steel plate bundle 5.

[0059] The steel plate bundle 5 is arranged at the rear of the shield machine body 01 , and the steel plate bundle 5 is arranged on a side of the fourth shield tail brush 4 away from the third shield tail brush 3 .

[0060] The slurry-stopping plate 10 is arranged at the tail of the shield machine body 01 , and the slurry-stopping plate 10 is arranged on the side of the steel plate bundle 5 away from the fourth shield tail brush 4 .

[0061] Preferably, the first shield tail brush 1, the second shield tail brush 2, the third shield tail brush 3, the fourth shield tail brush 4 and the steel plate bundle 5 are all arranged in an annular structure.

[0062] Furthermore, a first pressure sensor 7.1 is provided in the first annular grease chamber, and the oil pressure in the first annular grease chamber is detected by the first pressure sensor 7.1, so as to determine whether grease needs to be pumped in to supplement its pressure threshold;

[0063] A second pressure sensor 7.2 is provided in the second annular grease chamber, and the oil pressure in the second annular grease chamber is detected by the second pressure sensor 7.2, so as to determine whether grease needs to be pumped in to supplement its pressure threshold;

[0064] A third pressure sensor 7.3 is provided in the third annular grease chamber, and the third pressure sensor 7.3 detects the oil pressure in the third annular grease chamber, so as to determine whether grease needs to be pumped in to supplement its pressure threshold;

[0065] A fourth pressure sensor 7.4 is provided in the fourth annular grease chamber, and the oil pressure in the fourth annular grease chamber is detected by the fourth pressure sensor 7.4, so as to determine whether grease needs to be pumped in to supplement its pressure threshold.

[0066] As a further embodiment of the present invention, a grease polyurethane injection structure 8 is also provided at the tail of the shield machine body 01, and the grease polyurethane injection structure 8 includes a grease pipe 8.1 and a polyurethane emergency injection pipe 8.2. The grease pipe 8.1 is used to pump in an appropriate amount of grease to compensate for the pressure threshold after monitoring the grease pressure, and the polyurethane emergency injection pipe 8.2 is used to inject polyurethane in time to ensure construction safety when safety problems such as leakage of slurry and liquid occur in the project.

[0067] As a further embodiment of the present invention, see Figure 4(a) to Figure 4(d) As shown, the first pressure sensor 7.1, the second pressure sensor 7.2, the third pressure sensor 7.3 and the fourth pressure sensor 7.4 are each provided with four pieces, the four first pressure sensors 7.1 are respectively arranged at the nodes of the central axis of the cross section of the first annular grease chamber, the four second pressure sensors 7.2 are arranged at an angle of 45° to the central axis of the cross section of the second annular grease chamber, the four third pressure sensors 7.3 are arranged at an angle of 30° to the vertical central axis of the cross section of the third annular grease chamber, and the four fourth pressure sensors 7.4 are arranged at an angle of 30° to the horizontal central axis of the cross section of the fourth annular grease chamber.

[0068] As a further embodiment of the present invention, see Figures 5 to 7 As shown, the structures of the first shield tail brush 1, the second shield tail brush 2, the third shield tail brush 3 and the fourth shield tail brush 4 are all the same. Taking the first shield tail brush 1 as an example, it includes a cover plate 1.1, a bottom plate 1.2, a spring plate assembly, an intermediate brush wire layer 1.5 and a wear detection assembly 1.8;

[0069] The bottom plate 1.2 is installed on the shield machine body 01;

[0070] One end of the cover plate 1.1 is connected to the bottom plate 1.2, and the other end is bent to wrap around the spring plate assembly and fixed to the outside of the spring plate assembly;

[0071] The spring plate assembly is arranged on the bottom plate 1.2, and the spring plate assembly includes a first layer of spring bending plates 1.6, a second layer of spring bending plates 1.7, an intermediate layer of spring bending plates 1.3 and a bottom layer of spring bending plates 1.4 which are sequentially stacked on each other;

[0072] The middle brush wire layer 1.5 is arranged between the second layer of spring bending plate 1.7 and the bottom layer of spring bending plate 1.4;

[0073] The wear detection component 1.8 is used to detect the real-time wear condition of the first shield tail brush 1, and the wear detection component 1.8 is arranged between the first layer of spring bending plate 1.6 and the second layer of spring bending plate 1.7 and is fixedly connected to the second layer of spring bending plate 1.7.

[0074] Preferably, the cover plate 1.1 comprises a vertical plate and a horizontal plate connected to each other, one end of the vertical plate away from the horizontal plate is fixedly connected to the bottom plate 1.2, and the inner side surface of the horizontal plate is fixedly connected to the upper end surface of the first layer of spring bending plate 1.6.

[0075] Preferably, the distance between the wear detection component 1.8 and the end of the second layer spring bending plate 1.7 needs to be adapted to local conditions and leave an appropriate margin to ensure that after the wear detection component 1.8 is worn and damaged, the shield machine can still safely advance more than 100 meters and find a place that is more suitable for safely replacing the shield tail brush.

[0076] Preferably, the wear detection component 1.8 can be connected to the external signal processing system through electrical signals, or other connection methods such as optical signals, which is determined according to actual conditions.

[0077] Preferably, the wear detection component 1.8 includes a control circuit, a first detection element 1.8.1, a second detection element 1.8.2, a first connection circuit 1.8.3, a second connection circuit 1.8.4 and a terminal head 1.8.5; the first detection element 1.8.1 and the second detection element 1.8.2 are arranged parallel to each other in the horizontal direction, and the vertical height of the first detection element 1.8.1 is lower than the vertical height of the second detection element 1.8.2 (that is, the distance between the end of the first detection element 1.8.1 extending to the extension end of the second layer of spring bending plate 1.7 and the cover plate 1.1 is smaller than the distance between the end of the second detection element 1.8.2 extending to the extension end of the second layer of spring bending plate 1.7 and the cover plate 1.1); the first connection circuit 1.8.3 connects the first detection element 1.8.1 with the control circuit, the second connection circuit 1.8.4 connects the second detection element 1.8.2 with the control circuit, and the terminal head 1.8.5 is used to connect the control circuit with the control center of the shield machine body 01.

[0078] When the wear detection assembly 1.8 is used to detect the first layer of spring bending plate 1.6 that is in contact with the pipe segment 6 and causes wear, the first detection element 1.8.1 and the second detection element 1.8.2 in the wear detection assembly 1.8 are protected by the first layer of spring bending plate 1.6 and thus will not be worn, that is, the first connection circuit 1.8.3 and the second connection circuit 1.8.4 remain intact and maintain normal connection with the external signal processing system;

[0079] As time goes by, when the first layer of spring bending plate 1.6 is worn to the point where it cannot protect the wear detection component 1.8, the tube sheet 6 will wear the second detection element 1.8.2. When the second detection element 1.8.2 is worn to a certain extent, the second connection circuit 1.8.4 will be in a disconnected state and cannot send electrical signals to the external signal processing system. At this time, only the first connection circuit 1.8.3 can work normally. At the same time, the wear detection component 1.8 sets a corresponding warning signal based on the warning signal, warning that the wear detection component 1.8 has been partially worn, but can continue to be used.

[0080] When the pipe segment 6 continues to wear the second layer of spring bending plate 1.7, after being worn to a certain extent, the first detection element 1.8.1 will be worn, which will cause the first connection circuit 1.8.3 to be in an open circuit state and unable to send electrical signals to the external signal processing system. At this time, the wear detection component 1.8 loses its function completely, indicating that the shield tail brush needs to be replaced.

[0081] It should be noted that the "first" and "second" in the first detection element 1.8.1 and the second detection element 1.8.2, the first connecting circuit 1.8.3 and the second connecting circuit 1.8.4, the first layer of spring bending plate 1.6 and the second layer of spring bending plate 1.7 mentioned in the present application document are only for distinguishing the different positions and there is no order of precedence.

[0082] Furthermore, the shield machine also includes a remote information sending device and an external signal processing system, and the external signal processing system is simultaneously connected to the first pressure sensor 7.1, the second pressure sensor 7.2, the third pressure sensor 7.3, and the fourth pressure sensor 7.4 by signal; the remote information sending device is connected to the wear detection component of the shield tail brush through a signal receiving circuit; the outer periphery of the signal receiving circuit is wrapped with an insulating protective layer, and the signal receiving circuit is in contact with the inner wall of the shield tail of the shield machine body 01.

[0083] Preferably, the external signal processing system is also provided with an alarm indication system. During the operation of the shield tail brush device, the shield tail brush device first needs to be installed on the shield machine body. During the operation of the shield machine, the spring plate assembly and the middle brush wire layer will be deformed by the extrusion of the pipe segment, and the upper bending plate or the middle brush wire layer directly in contact with the pipe segment will be worn; when the wear detection assembly is not worn to the point of wear, the wear detection assembly can transmit signals normally. When the wear detection assembly is worn to a certain extent, the wear detection assembly cannot transmit signals normally. At the same time, the alarm indication system will hear an alarm sound on the terminal console and the red light will be on when the shield tail brush that cannot transmit signals normally is on. It is judged that the wear degree of the shield tail brush has reached the threshold and the shield tail brush needs to be replaced, which avoids the situation where the working time of the shield tail brush is less than the actual service life, saves unnecessary replacement costs, and improves construction efficiency. At the same time, due to the squeezing of the pipe segment, a closed grease chamber is formed between the shield tail brush device and the pipe segment. Since the grease chamber pressure detection component is located in the closed grease chamber, it is convenient to more accurately judge the pressure in the grease chamber. When the oil pressure in the grease chamber is lower than a certain threshold, an alarm will be issued on the terminal console, and the automatic grease injection mode will be turned on to ensure that the required grease pressure of the shield tail brush device is reached, avoiding excessive wear of the shield tail brush due to too low oil pressure, thereby reducing the number of replacement times of the shield tail brush to a certain extent.

[0084] As a further embodiment of the present invention, see Figure 8 As shown, the steel plate bundle 5 is configured as a hook structure, which can better protect the fourth shield tail brush 4 and the fourth pressure sensor 7.4, thereby improving the overall sealing performance.

[0085] Preferably, the steel sheet bundle 5 comprises a bottom spring bending plate 5.1 of the steel sheet bundle, a top spring bending plate 5.2 of the steel sheet bundle, a steel sheet bundle pressing plate 5.3 and a steel sheet bundle bottom plate 5.4;

[0086] The steel plate bundle bottom plate 5.4 is fixedly connected to the shield machine body 01, and a steel wire bundle layer, a steel plate bundle top spring bending plate 5.2 and a steel plate bundle pressure plate 5.3 are sequentially arranged on the steel plate bundle bottom plate 5.4 from bottom to top. The steel plate bundle bottom plate 5.4, the steel wire bundle layer, the steel plate bundle top spring bending plate 5.2 and the steel plate bundle pressure plate 5.3 are fixedly connected to each other by bolts 5.5.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shield tail brush device, arranged at the tail of a shield machine body (01), characterized in that: It comprises a plurality of shield tail brushes arranged at intervals from each other, a steel plate bundle (5) arranged on one side of the shield tail brush, a wear detection component (1.8) for detecting the wear condition of the shield tail brush, and a sealing structure arranged between two adjacent shield tail brushes; The plurality of shield tail brushes are all connected to the shield machine body (01), the steel plate bundle (5) is connected to the shield machine body (01), the wear detection assembly (1.8) is provided with a plurality of pieces arranged in one-to-one correspondence with the plurality of shield tail brushes, and a single wear detection assembly (1.8) is installed on the single shield tail brush; The sealing structure comprises a grease chamber (9) and a pressure detection component (7) arranged in the grease chamber (9), wherein the pressure detection component (7) is used to perform real-time detection of the grease pressure in the grease chamber (9).

2. The shield tail brush device according to claim 1, characterized in that: The shield tail brush comprises a cover plate (1.1), a bottom plate (1.2), a spring plate assembly and an intermediate brush wire layer (1.5); The bottom plate (1.2) is installed on the shield machine body (01); One end of the cover plate (1.1) is connected to the bottom plate (1.2), and the other end is bent to wrap around the spring plate assembly and fixed to the outside of the spring plate assembly; The spring plate assembly is arranged on the bottom plate (1.2), and comprises a first layer of spring bending plates (1.6), a second layer of spring bending plates (1.7), an intermediate layer of spring bending plates (1.3) and a bottom layer of spring bending plates (1.4) which are sequentially stacked from close to the bottom plate (1.2) to far away from the bottom plate (1.2); The middle brush wire layer (1.5) is arranged between the second layer of spring bending plate (1.7) and the bottom layer of spring bending plate (1.4); The wear detection component (1.8) is arranged between the first layer of spring bending plate (1.6) and the second layer of spring bending plate (1.7) and is fixedly connected to the second layer of spring bending plate (1.7).

3. The shield tail brush device according to claim 2, characterized in that: The first layer of spring bending plate (1.6) comprises a first horizontal section and a first inclined section which are integrally formed; The second layer of spring bending plate (1.7) comprises a second horizontal section and a second inclined section which are integrally formed; The middle layer spring bending plate (1.3) comprises a third horizontal section and a third inclined section which are integrally formed; The bottom spring bending plate (1.4) comprises a fourth horizontal section and a fourth inclined section which are integrally formed; The first horizontal section is connected to the bottom plate (1.2), the second horizontal section, the third horizontal section and the fourth horizontal section are sequentially stacked on the first horizontal section, and the cover plate (1.1) is arranged on the fourth horizontal section; The first inclined section, the second inclined section, the third inclined section and the fourth inclined section are stacked in sequence, and the length of the first inclined section, the length of the second inclined section, the length of the third inclined section and the length of the fourth inclined section are arranged in sequence from small to large.

4. The shield tail brush device according to claim 2, characterized in that: A plurality of brushes made of steel wires are arranged on the outer surface of the middle brush wire layer (1.5).

5. The shield tail brush device according to any one of claims 1 to 4, characterized in that: The wear detection component (1.8) comprises a control circuit, a first detection element (1.8.1), a second detection element (1.8.2), a first connection circuit (1.8.3) and a second connection circuit (1.8.4); The first detection element (1.8.1) and the second detection element (1.8.2) are arranged side by side in a horizontal direction, and the vertical height of the first detection element (1.8.1) is lower than the vertical height of the second detection element (1.8.2); The first connecting circuit (1.8.3) connects the first detection element (1.8.1) and the control circuit, and the second connecting circuit (1.8.4) connects the second detection element (1.8.2) and the control circuit.

6. The shield tail brush device according to claim 5, characterized in that: The shield tail brush comprises a first shield tail brush (1), a second shield tail brush (2), a third shield tail brush (3) and a fourth shield tail brush (4) which are sequentially arranged at intervals from each other; The grease chamber (9) is configured as an annular structure, and the grease chamber (9) comprises a first annular grease chamber respectively disposed between the first shield tail brush (1) and the second shield tail brush (2), a second annular grease chamber disposed between the second shield tail brush (2) and the third shield tail brush (3), a third annular grease chamber between the third shield tail brush (3) and the fourth shield tail brush (4), and a fourth annular grease chamber between the fourth shield tail brush (4) and the steel plate bundle (5); The pressure detection assembly (7) comprises a first pressure sensor (7.1) arranged in a first annular grease cavity, a second pressure sensor (7.2) arranged in a second annular grease cavity, a third pressure sensor (7.3) arranged in a third annular grease cavity, and a fourth pressure sensor (7.4) arranged in a fourth annular grease cavity.

7. The shield tail brush device according to claim 6, characterized in that: The first pressure sensor (7.1), the second pressure sensor (7.2), the third pressure sensor (7.3) and the fourth pressure sensor (7.4) are each provided with four pieces; Four first pressure sensors (7.1) are respectively arranged on the nodes of the central axis of the cross section of the first annular grease chamber; The four second pressure sensors (7.2) are arranged at an angle of 45° to the central axis of the cross section of the second annular grease chamber; The four third pressure sensors (7.3) are arranged at an angle of 30° to the vertical center axis of the cross section of the third annular grease chamber; The four fourth pressure sensors (7.4) are arranged at an angle of 30° to the horizontal central axis of the cross section of the fourth annular grease chamber.

8. The shield tail brush device according to claim 6 or 7, characterized in that: The steel plate bundle (5) is configured as a hook structure; and the steel plate bundle (5) comprises a bottom spring bending plate (5.1) of the steel plate bundle, a top spring bending plate (5.2) of the steel plate bundle, a steel plate bundle pressure plate (5.3) and a steel plate bundle bottom plate (5.4); The steel plate bundle bottom plate (5.4) is fixedly connected to the shield machine body (01), and a steel wire bundle layer, a steel plate bundle top layer spring bending plate (5.2) and a steel plate bundle pressure plate (5.3) are sequentially arranged on the steel plate bundle bottom plate (5.4) from bottom to top, and the steel plate bundle bottom plate (5.4), the steel wire bundle layer, the steel plate bundle top layer spring bending plate (5.2) and the steel plate bundle pressure plate (5.3) are fixedly connected to each other.

9. The shield tail brush device according to claim 8, characterized in that: It also includes a grease pipe (8.1) and a polyurethane emergency injection pipe (8.2) arranged at the tail of the shield machine body (01); The grease pipe (8.1) connects the grease chamber (9) and an external grease pump and is used to pump grease into the grease chamber (9); The polyurethane emergency injection pipe (8.2) connects the grease chamber (9) and an external polyurethane pump and is used to pump polyurethane into the grease chamber (9) when the grease chamber (9) leaks slurry and / or liquid.

10. A shield machine, characterized in that: It comprises a shield machine body and a shield tail brush device as described in any one of claims 1 to 9.

Images