Shield cutter head opening plugging device

Abstract

The utility model belongs to the technical field of cutterhead opening plugging, and particularly relates to a shield cutterhead opening plugging device which comprises a shield sealing plate A, an anchor plate arranged on one side of the shield sealing plate A, a reinforcing assembly arranged on one side of the anchor plate, a left mounting frame arranged on one side of the back of the shield sealing plate A, a connecting piece arranged in the left mounting frame, and a fastening nut arranged at one end of the connecting piece. A sealing piece is arranged on the front side of the connecting piece. The left mounting frame, the connecting piece, the fastening nut, the sealing piece and the right mounting frame are matched with one another, so that the problems that in the splicing process of the shield sealing plates, repeated calibration, positioning and connection are needed, and procedure connection is complex due to the fact that the shield sealing plates are limited by a narrow operation space are solved; through mutual cooperation of the base material layer, the corrosion-resistant layer, the first wear-resistant layer, the second wear-resistant layer and the third wear-resistant layer, the wear-resistant performance of the shield sealing plate is improved, and the problem that the surface of the shield sealing plate is prone to local stripping or excessive wear due to abrasive particle erosion when the device is used for tunneling in a complex stratum is solved.

Description

Technical Field

[0001] This utility model relates to the field of cutterhead opening sealing technology, specifically a shield tunnel cutterhead opening sealing device. Background Technology

[0002] The shield cutterhead opening sealing device is mainly used to seal the opening area of ​​the shield cutterhead to ensure the safety of the opening construction. It mainly uses detachable components such as sealing shield plate, anchor plate, support screw, and pressure plate to form a stable closed structure to prevent soil or slag from entering the construction area. It is a key device to deal with adverse geological conditions such as tunnel face voids and water leakage.

[0003] Existing patent number CN210660103U provides a shield tunnel cutterhead opening sealing device, belonging to the field of shield tunneling construction technology. It is composed of an opening sealing shield, anchor plate, external threaded column positioning holes, rear seat plate positioning holes, rear seat plate, support screw positioning holes, external threaded column, internal threaded bolt, support screw, pressure bolt, long pressure plate, long pressure plate support, short pressure plate, and short pressure plate support, working together to effectively and stably seal the shield tunnel cutterhead opening area. All components are detachable and can be easily transported manually from outside the narrow earth chamber entrance for construction. It has the advantages of convenient transportation and assembly, reliable anchoring, and wide applicability.

[0004] The existing technology has the following problems:

[0005] 1. The existing shield cutterhead opening sealing device requires repeated calibration and positioning during the assembly of the shield plates. Due to the limited working space, the process is complicated, which prolongs the shield start-up and shutdown cycle and fails to meet the usage requirements.

[0006] 2. The existing shield cutterhead opening sealing device has a shield plate with less than ideal wear resistance. This makes the shield plate surface prone to local peeling or excessive wear due to abrasive erosion when the device is tunneling in complex strata. This results in frequent sealing failures, shortened maintenance cycles, and a significant increase in downtime for maintenance and component replacement costs. It also reduces construction efficiency and the continuous operation capability of the equipment, making it less practical. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a shield cutterhead opening sealing device. It solves the problems of the current assembly process between sealing plates, which requires repeated calibration and positioning, and is limited by the narrow working space, resulting in complex process connections. Furthermore, the wear resistance of the sealing plates is not ideal, which makes the surface of the sealing plates prone to local peeling or excessive wear due to abrasive erosion when the device is tunneling in complex strata. This leads to frequent sealing failures, shortened maintenance cycles, and a significant increase in downtime for maintenance and component replacement costs.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a shield tunnel cutterhead opening sealing device, comprising a shield plate A, an anchor plate on one side of the shield plate A, a reinforcing component on one side of the anchor plate, a left mounting bracket on the back side of the shield plate A, a connector inside the left mounting bracket, a fastening nut at one end of the connector, a sealing component on the front side of the connector, a shield plate B on the other side of the shield plate A, and a right mounting bracket on the back side of the shield plate B.

[0009] As a preferred embodiment of this utility model, the left mounting bracket and the right mounting bracket are respectively fixedly connected and mounted on the shield plate A and the shield plate B. The positions of the left mounting bracket and the right mounting bracket are respectively arranged to correspond to each other. The dimensions of the left mounting bracket and the connecting parts are adapted to the dimensions of the right mounting bracket.

[0010] As a preferred technical solution of this utility model, the connector is U-shaped in general, and both ends of the connector are provided with threads that are adapted to the size of the fastening nut.

[0011] In a preferred embodiment of this utility model, the sealing element is installed on the connector by adhesive bonding, the size of the sealing element is adapted to the size of the connector, and the sealing element is specifically made of rubber.

[0012] As a preferred embodiment of the present invention, the shield plate B includes a substrate layer, an anti-corrosion layer is provided on the outer surface of the substrate layer, a first wear-resistant layer is provided on the outer surface of the anti-corrosion layer, a second wear-resistant layer is provided on the outer surface of the first wear-resistant layer, and a third wear-resistant layer is provided on the outer surface of the second wear-resistant layer.

[0013] As a preferred embodiment of this utility model, the substrate layer is specifically made of high-strength chromium-molybdenum steel, the anti-corrosion layer is specifically made of nickel-plated alloy, and the inner wall of the anti-corrosion layer is bonded to the outer surface of the substrate layer.

[0014] As a preferred technical solution of this utility model, the first wear-resistant layer, the second wear-resistant layer and the third wear-resistant layer are respectively made of nano-carbon material, high-density tungsten carbide alloy material and polycrystalline diamond material, and the thickness of the first wear-resistant layer, the thickness of the second wear-resistant layer and the thickness of the third wear-resistant layer are set to be the same.

[0015] Compared with the prior art, the present invention provides a shield cutterhead opening sealing device, which has the following beneficial effects:

[0016] 1. This shield tunnel cutterhead opening sealing device, by setting up a left mounting bracket, connectors, fastening nuts, seals, and a right mounting bracket, allows for precise alignment of the edges of shield plates A and B during shield plate assembly. Then, the tail ends of the connectors are inserted into the corresponding left and right mounting brackets, respectively. Initial positioning is achieved through a simple push-in action, requiring no complex tools or additional adjustments. Next, the fastening nuts are used to tighten and secure the tail ends of the connectors, further enhancing connection rigidity through a threaded locking mechanism. The entire assembly operation is intuitive and convenient. Finally, the seals ensure a tight fit between the connectors and the mounting brackets, significantly improving the overall stability and impact resistance of the shield plate structure. This design avoids the need for repeated calibration and positioning during shield plate assembly, and eliminates the complex process connections caused by limited working space, thus meeting usage requirements.

[0017] 2. This shield tunnel cutterhead opening sealing device comprises a base material layer, an anti-corrosion layer, a first wear-resistant layer, a second wear-resistant layer, and a third wear-resistant layer. During use, the base material layer, made of high-strength chromium-molybdenum steel, serves as the core structural support, ensuring impact resistance and stability. The anti-corrosion layer, made of nickel-plated alloy, possesses strong corrosion resistance, forming a chemical erosion barrier to resist groundwater and chemical corrosion. Finally, the first wear-resistant layer, composed of nano-carbon materials, reduces friction and stress through its self-lubricating properties. The second wear-resistant layer, made of high-density tungsten carbide alloy, resists severe erosion by coarse particles. The third wear-resistant layer, made of polycrystalline diamond, forms an ultra-hard and dense surface, withstanding high pressure and high temperature extreme wear. Through gradient transition design and interlayer stress optimization, the risk of interface spalling is eliminated, adapting to multi-size abrasive composite wear conditions. This design improves the wear resistance of the shield plate, preventing localized spalling or excessive wear on the shield plate surface due to abrasive erosion during tunneling in complex strata. It improves construction efficiency and the equipment's continuous operation capability, demonstrating strong practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the back structure of the shield plate of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the connector of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the shield plate of this utility model.

[0022] In the diagram: 1. Shield plate A; 2. Anchor plate; 3. Reinforcing component; 4. Left mounting bracket; 5. Connector; 6. Fastening nut; 7. Seal; 8. Shield plate B; 801. Substrate layer; 802. Anti-corrosion layer; 803. First wear-resistant layer; 804. Second wear-resistant layer; 805. Third wear-resistant layer; 9. Right mounting bracket. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a shield tunnel cutterhead opening sealing device, including a shield plate A1, an anchor plate 2 on one side of the shield plate A1, a reinforcing component 3 on one side of the anchor plate 2, a left mounting bracket 4 on the back side of the shield plate A1, a connector 5 inside the left mounting bracket 4, a fastening nut 6 at one end of the connector 5, a sealing component 7 on the front side of the connector 5, a shield plate B8 on the other side of the shield plate A1, and a right mounting bracket 9 on the back side of the shield plate B8; the left mounting bracket 4 and the right mounting bracket 9 are respectively fixedly connected and installed on the shield plate A1 and the shield plate B8, the position of the left mounting bracket 4 and the position of the right mounting bracket 9 are corresponding to each other, and the size of the left mounting bracket 4 and the size of the connector 5 are adapted to the size of the right mounting bracket 9;

[0025] Specifically, it facilitates the insertion of the tail end of connector 5 into the corresponding left mounting bracket 4 and right mounting bracket 9, respectively. The initial positioning can be completed with a simple pushing action, avoiding the problem of repeated calibration of positioning and connection during the assembly of the shield plates.

[0026] Reference Figure 2 and Figure 3 The connector 5 is U-shaped, and both ends of the connector 5 are threaded to match the size of the fastening nut 6.

[0027] Specifically, it facilitates the tightening and fixing of both ends of the connector 5 by tightening the nuts 6, and further strengthens the connection rigidity by using the threaded locking mechanism, making the entire splicing operation intuitive and convenient.

[0028] Reference Figure 3 The seal 7 is installed on the connector 5 by adhesive bonding. The size of the seal 7 is adapted to the size of the connector 5. The seal 7 is made of rubber.

[0029] Specifically, the sealing element 7 ensures a tight fit between the connector 5 and the mounting bracket, significantly improving the overall stability and impact resistance of the shield plate structure.

[0030] Reference Figure 1 , Figure 2 and Figure 4 The shield plate B8 includes a substrate layer 801, an anti-corrosion layer 802 on the outer surface of the substrate layer 801, a first wear-resistant layer 803 on the outer surface of the anti-corrosion layer 802, a second wear-resistant layer 804 on the outer surface of the first wear-resistant layer 803, and a third wear-resistant layer 805 on the outer surface of the second wear-resistant layer 804. The substrate layer 801 is specifically made of high-strength chromium-molybdenum steel, and the anti-corrosion layer 802 is specifically made of nickel-plated alloy. The inner wall of the anti-corrosion layer 802 is in contact with the outer surface of the substrate layer 801.

[0031] Specifically, the substrate layer 801 serves as the core of structural support, ensuring impact resistance and stability. At the same time, the anti-corrosion layer 802 provides strong corrosion resistance, forming a chemical erosion barrier to resist groundwater and chemical corrosion, thereby improving the service life of the shield plate.

[0032] Reference Figure 4 The first wear-resistant layer 803, the second wear-resistant layer 804 and the third wear-resistant layer 805 are made of nano-carbon material, high-density tungsten carbide alloy material and polycrystalline diamond material, respectively. The thickness of the first wear-resistant layer 803, the thickness of the second wear-resistant layer 804 and the thickness of the third wear-resistant layer 805 are set to be the same.

[0033] Specifically: the first wear-resistant layer 803, made of nano-carbon material, reduces friction and stress through its self-lubricating properties; the second wear-resistant layer 804, made of high-density tungsten carbide alloy, resists the severe erosion of coarse particles; and the third wear-resistant layer 805, made of polycrystalline diamond, forms an ultra-hard and dense surface that can withstand extreme wear under high pressure and high temperature. Through gradient transition design and interlayer stress optimization, the risk of interface peeling is eliminated, making it suitable for composite wear conditions of multi-particle-size abrasives.

[0034] It should be noted that: the reinforcement component 3 is well known or can be found by those skilled in the art related to this utility model, and therefore will not be described here.

[0035] The working principle and usage process of this utility model are as follows: When splicing the shield plates, firstly, the edges of the shield plates A1 and B8 are precisely aligned. Then, the tail ends of the connectors 5 are inserted into the corresponding left mounting brackets 4 and right mounting brackets 9 respectively. The initial positioning can be completed by a simple push-in action without the need for complicated tools or additional adjustments. Next, the tail ends of the connectors 5 are tightened and fixed with fastening nuts 6. The threaded locking mechanism further strengthens the connection rigidity. The entire splicing operation is intuitive and convenient. Finally, the sealing element 7 ensures that the connection between the connectors 5 and the mounting brackets fits tightly, which can greatly improve the stability and impact resistance of the overall structure of the shield plate.

[0036] During use, the base material layer 801 inside the shield plate is made of high-strength chromium-molybdenum steel, which serves as the core of the structural support and ensures impact resistance and stability. Then, the anti-corrosion layer 802 on the outer surface of the base material layer 801 is made of nickel-based alloy, which has strong corrosion resistance and forms a chemical erosion barrier to resist groundwater and chemical corrosion. Finally, the first wear-resistant layer 803 is made of nano-carbon material, which reduces friction and stress through its self-lubricating properties. The second wear-resistant layer 804 is made of high-density tungsten carbide alloy to resist the severe erosion of coarse particles. The third wear-resistant layer 805 is made of polycrystalline diamond to form an ultra-hard and dense surface, which can withstand high pressure and high temperature extreme wear. Through gradient transition design and interlayer stress optimization, the risk of interface peeling is eliminated, and it can adapt to multi-size abrasive composite wear conditions.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shield tunnel cutterhead opening sealing device, comprising a shield sealing plate A(1), characterized in that: An anchor plate (2) is provided on one side of the shield plate A (1), a reinforcing component (3) is provided on one side of the anchor plate (2), a left mounting bracket (4) is provided on one side of the back of the shield plate A (1), a connector (5) is provided inside the left mounting bracket (4), a fastening nut (6) is provided at one end of the connector (5), a sealing component (7) is provided on one side of the front of the connector (5), a shield plate B (8) is provided on the other side of the shield plate A (1), and a right mounting bracket (9) is provided on one side of the back of the shield plate B (8).

2. The shield tunnel cutterhead opening sealing device according to claim 1, characterized in that: The left mounting bracket (4) and the right mounting bracket (9) are respectively fixedly connected to the shield plate A (1) and the shield plate B (8). The position of the left mounting bracket (4) and the position of the right mounting bracket (9) are respectively set to correspond to each other. The size of the left mounting bracket (4) and the size of the connector (5) are adapted to the size of the right mounting bracket (9).

3. The shield tunnel cutterhead opening sealing device according to claim 1, characterized in that: The connector (5) is U-shaped, and both ends of the connector (5) are threaded to match the size of the fastening nut (6).

4. The shield tunnel cutterhead opening sealing device according to claim 1, characterized in that: The seal (7) is installed on the connector (5) by adhesive bonding. The size of the seal (7) is adapted to the size of the connector (5). The seal (7) is specifically made of rubber.

5. The shield tunnel cutterhead opening sealing device according to claim 1, characterized in that: The shield plate B (8) includes a substrate layer (801), an anti-corrosion layer (802) is provided on the outer surface of the substrate layer (801), a first wear-resistant layer (803) is provided on the outer surface of the anti-corrosion layer (802), a second wear-resistant layer (804) is provided on the outer surface of the first wear-resistant layer (803), and a third wear-resistant layer (805) is provided on the outer surface of the second wear-resistant layer (804).

6. The shield tunnel cutterhead opening sealing device according to claim 5, characterized in that: The substrate layer (801) is specifically made of high-strength chromium-molybdenum steel, and the anti-corrosion layer (802) is specifically made of nickel-based alloy plating. The inner wall of the anti-corrosion layer (802) is attached to the outer surface of the substrate layer (801).

7. A shield tunnel cutterhead opening sealing device according to claim 5, characterized in that: The first wear-resistant layer (803), the second wear-resistant layer (804) and the third wear-resistant layer (805) are made of nano-carbon material, high-density tungsten carbide alloy material and polycrystalline diamond material, respectively. The thickness of the first wear-resistant layer (803), the second wear-resistant layer (804) and the third wear-resistant layer (805) are set to be the same.

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