Sealing device for shield receiving

Abstract

The utility model relates to the technical field of shield equipment, in particular to a sealing device for shield receiving. The sealing device for shield receiving comprises a first sealing ring, a second sealing ring, an air bag and a driving assembly. The first sealing ring is arranged on the peripheral side of the shield tunneling machine in a sleeving mode. The air bag is arranged between the first sealing ring and the shield tunneling machine and has an inflation state and a deflation state. The peripheral side of the first sealing ring is sleeved with the second sealing ring, and a sealing ring is arranged between the second sealing ring and the first sealing ring. The driving assembly comprises a body and a telescopic rod, one end of the telescopic rod is movably connected with the body, the other end of the telescopic rod is fixedly connected with the second sealing ring, the end, away from the driving assembly, of the second sealing ring is fixedly connected with the ground wall, the body is fixedly connected with the first sealing ring, and the body can drive the first sealing ring to reciprocate in the tunneling direction of the shield tunneling machine. According to the sealing device for shield receiving, the sealing performance between a shield tunneling machine and a tunnel portal ring can be improved, and the operation efficiency and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield equipment, in particular to a shield receiving sealing device. Background Art

[0002] At present, the development of tunnels has gradually introduced shield construction, which is a new type of dark excavation construction method and has become an important part of the transportation development of major cities at home and abroad. It has the advantages of large transportation capacity, high speed, low noise, light pollution, good ecological environment, economic and social benefits, and is becoming more and more popular.

[0003] Shield receiving refers to the process from the shield machine exiting the tunnel to the shield machine falling onto the receiving base in the receiving working shaft during tunnel shield construction. Usually, a steel tunnel door ring is installed at the tunnel entrance to reinforce the tunnel entrance. To ensure that the shield machine can exit the tunnel smoothly, the inner diameter of the tunnel door ring must be larger than the diameter of the shield machine. Therefore, there will be a certain gap between the tunnel door ring and the shield machine during shield receiving. Under water-rich geological conditions, when the shield is received, the gap between the tunnel door ring and the shield machine is prone to water and sand gushing, which brings great safety hazards to shield construction.

[0004] In order to solve the above problems, in the prior art, a circle of rubber curtain plates is arranged around the receiving hole of the shield machine as a sealing device. Since the diameter of the cutter head of the shield machine itself is larger than other parts of the shield machine, the sealing method in the prior art can only play a sealing role to a certain extent. As the shield machine gradually exits the hole, the overall diameter tends to become smaller and smaller, so the sealing effect will become worse and worse, thereby affecting the safety and operation efficiency of the engineering construction.

[0005] Therefore, it is urgent to design a sealing device for shield receiving to solve the above technical problems. Utility Model Content

[0006] The utility model aims to provide a shield receiving sealing device, which can improve the sealing performance between the shield machine and the tunnel door ring during the shield receiving process, and improve the operation efficiency and safety.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a shield receiving sealing device, which is used to seal the gap between the shield machine and the tunnel door ring. The shield receiving sealing device comprises:

[0009] A first sealing ring, wherein the first sealing ring is sleeved on the outer peripheral side of the shield machine;

[0010] An airbag, the airbag is arranged between the first sealing ring and the shield machine, and the airbag has an inflated state and a deflated state;

[0011] A second sealing ring, wherein the second sealing ring is sleeved on the outer circumference of the first sealing ring, and a sealing ring is provided between the second sealing ring and the first sealing ring;

[0012] A driving assembly, the driving assembly includes a main body and a telescopic rod, one end of the telescopic rod is movably connected to the main body, the other end of the telescopic rod is fixedly connected to the second sealing ring, one end of the second sealing ring away from the driving assembly is fixedly connected to the ground wall, the main body is fixedly connected to the first sealing ring, and the main body can drive the first sealing ring to reciprocate along the excavation direction of the shield machine.

[0013] As an optional technical solution for a shield receiving sealing device, the shield receiving sealing device also includes an air compressor, which is connected to the airbag and can inflate or deflate the airbag to put the airbag in an inflated state or a deflated state.

[0014] As an optional technical solution for a shield receiving sealing device, the airbag is adhesively connected to the first sealing ring. When the airbag is in an inflated state, the airbag can press the shield machine and the first sealing ring; when the airbag is in a deflated state, the airbag can be separated from the shield machine.

[0015] As an optional technical solution for a shield receiving sealing device, the main body includes a hydraulic cylinder, one end of the telescopic rod is movably connected to the hydraulic cylinder, and the other end of the telescopic rod is fixedly connected to the second sealing ring.

[0016] As an optional technical solution for a shield receiving sealing device, the driving assembly further includes a hydraulic pump station, which is connected to the hydraulic cylinder and is configured to control the oil pressure of the hydraulic cylinder.

[0017] As an optional technical solution for a shield receiving sealing device, a limiting member is provided on the second sealing ring, and the limiting member is configured to limit the first sealing ring.

[0018] As an optional technical solution for a shield receiving sealing device, the limiting member is arranged in a ring shape, and the limiting member is welded to the inner wall of the second sealing ring.

[0019] As an optional technical solution for a shield receiving sealing device, the first sealing ring and the second sealing ring are both metal parts.

[0020] As an optional technical solution for a shield receiving sealing device, the sealing ring is a silicone member.

[0021] As an optional technical solution for a shield receiving sealing device, one end of the second sealing ring is welded to the ground wall, and the other end of the second sealing ring is welded to the telescopic rod.

[0022] The beneficial effects of the utility model include at least:

[0023] The utility model provides a shield receiving sealing device, which is used to seal the gap between the shield machine and the tunnel door ring. The shield receiving sealing device includes a first sealing ring, a second sealing ring, an airbag and a driving assembly. Among them, the first sealing ring is sleeved on the outer peripheral side of the shield machine. The airbag is arranged between the first sealing ring and the shield machine, and the airbag has an inflated state and a deflated state. The second sealing ring is sleeved on the outer peripheral side of the first sealing ring, and a sealing ring is arranged between the second sealing ring and the first sealing ring. The driving assembly includes a body and a telescopic rod, one end of the telescopic rod is movably connected to the body, the other end of the telescopic rod is fixedly connected to the second sealing ring, the end of the second sealing ring away from the driving assembly is fixedly connected to the ground wall, the body is fixedly connected to the first sealing ring, and the body can drive the first sealing ring to reciprocate along the excavation direction of the shield machine. Through the arrangement of the airbag and the driving assembly, the shield receiving sealing device can achieve the dual effects of static sealing and dynamic sealing, that is, when the shield machine is stationary and excavating, the shield receiving sealing device can seal between the shield machine and the tunnel ring, thereby improving the sealing performance. The arrangement of the first sealing ring, the second sealing ring and the sealing ring can ensure the reliability of the sealing, so that the shield machine can excavate smoothly during the receiving process, ensuring the safety of the construction and the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the assembly structure of a shield receiving sealing device and a shield machine provided in an embodiment of the utility model;

[0026] Figure 2 A side view of a shield receiving sealing device and a shield machine provided in an embodiment of the utility model.

[0027] Reference numerals

[0028] 10. Shield machine; 20. Ground wall;

[0029] 100, first sealing ring; 200, airbag; 300, second sealing ring; 400, sealing ring; 500, driving assembly; 510, main body; 520, telescopic rod; 530, hydraulic pump station; 600, air compressor; 700, limiter; 800, controller. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] In the description of this embodiment, unless otherwise specified, the term "plurality" refers to a quantity of two or more than two.

[0035] The receiving process of the shield machine refers to the process in which the shield machine excavates from the tunnel to the receiving working shaft and lands safely and accurately on the receiving base after the shield construction is completed. This process is an important part of the shield construction, involving the precise control and operation of the shield machine to ensure that the shield machine can successfully complete the excavation task and return safely.

[0036] During the receiving process, a series of operations and preparations need to be carried out, such as internal inspection of the shield machine, reinforcement of the soil at the tunnel entrance, accurate measurement of the coordinate position and posture of the shield machine, etc. At the same time, it is also necessary to gradually reduce the earth pressure (mud and water pressure) setting value and timely block the gap between the outer periphery of the segment at the tunnel entrance and the shield excavation hole to ensure the safety of the shield machine and the stability of the tunnel.

[0037] The receiving process is usually divided into two stages: initial receiving and final receiving. Initial receiving refers to the inspection before the shield machine enters the receiving site of the interval shield machine, including the preparation of the shield machine and the safety of the surrounding environment. Final receiving refers to the inspection after the tunnel exit is completed to ensure that the shield machine has completely landed on the receiving base and the safety and stability of the tunnel are guaranteed.

[0038] Sealing is always a very important link, whether in the initial acceptance stage or the final acceptance stage. Sealing measures can prevent soil, rock, water, mud and other substances from entering the shield machine or the tunnel, thereby ensuring the normal operation of the shield machine and the safety and stability of the tunnel. At the same time, sealing can also control the water pressure and groundwater level in the tunnel, prevent groundwater influx and mud leakage, keep the working surface dry and the construction proceed smoothly.

[0039] This embodiment provides a shield receiving sealing device, which can improve the sealing performance between the shield machine and the tunnel door ring during the shield receiving process, thereby improving operating efficiency and safety.

[0040] like Figure 1-Figure 2As shown, the shield receiving sealing device is used to seal the gap between the shield machine 10 and the tunnel door ring, and the shield receiving sealing device mainly includes a first sealing ring 100, a second sealing ring 300, an airbag 200 and a driving assembly 500. Among them, the first sealing ring 100 is sleeved on the outer peripheral side of the shield machine 10. The airbag 200 is arranged between the first sealing ring 100 and the shield machine 10, and the airbag 200 has an inflated state and a deflated state. The second sealing ring 300 is sleeved on the outer peripheral side of the first sealing ring 100, and a sealing ring 400 is arranged between the second sealing ring 300 and the first sealing ring 100. The driving assembly 500 includes a main body 510 and a telescopic rod 520, one end of the telescopic rod 520 is movably connected to the main body 510, the other end of the telescopic rod 520 is fixedly connected to the second sealing ring 300, the end of the second sealing ring 300 away from the driving assembly 500 is fixedly connected to the ground wall 20, the main body 510 is fixedly connected to the first sealing ring 100, and the main body 510 can drive the first sealing ring 100 to reciprocate along the excavation direction of the shield machine 10.

[0041] Based on the above design, in this embodiment, the shield receiving sealing device also includes a controller 800, and the controller 800 is electrically connected to the body 510 of the drive assembly 500. When the airbag 200 is in an inflated state, the airbag 200 can press the first sealing ring 100 and the shield machine 10, so that a static seal is formed between the shield machine 10 and the first sealing ring 100. When the shield machine 10 is excavating, the controller 800 can control the drive assembly 500 so that the body 510 of the drive assembly 500 drives the first sealing ring 100 to move in the excavation direction of the shield machine 10 ( Figure 1 The direction indicated by the middle arrow is the excavation direction of the shield machine 10), so that the shield machine 10, the airbag 200, the first sealing ring 100 and the body 510 can move synchronously and excavate synchronously. During the excavation of the shield machine 10, the airbag 200 can always press the shield machine 10 and the first sealing ring 100, thereby forming a dynamic seal. It should be noted that during the excavation of the shield machine 10, the telescopic rod 520 is continuously extended, and the second sealing ring 300 is stationary.

[0042] When the shield machine 10 needs to stop excavating, the airbag 200 is deflated and in a deflated state. At this time, the airbag 200 can be separated from the shield machine 10, and the controller 800 controls the main body 510 of the driving assembly 500 to retract, so that the main body 510 drives the first sealing ring 100 and the airbag 200 to retreat synchronously. When retreating to a certain position, the driving assembly 500 stops driving. At this time, the airbag 200 can be inflated again and press the first sealing ring 100 and the shield machine 10, and so on. The above process is repeated until the shield machine 10 is moved out.

[0043] In this embodiment, a sealing ring 400 is provided between the first sealing ring 100 and the second sealing ring 300, which can not only improve the sealing performance of the shield receiving sealing device, but also prevent foreign matter such as mud from contaminating the working surface of the shield machine 10, thereby ensuring the dryness of the working surface and the smooth progress of the construction. At the same time, it avoids the rigid contact between the first sealing ring 100 and the second sealing ring 300, thereby extending the service life.

[0044] Optionally, the sealing ring 400 in this embodiment can be made of silicone or rubber.

[0045] Optionally, one end of the second sealing ring 300 in this embodiment is welded to the ground wall 20, and the other end of the second sealing ring 300 is welded to the telescopic rod 520. This improves the stability and reliability of the second sealing ring 300, avoids the second sealing ring 300 from loosening during the tunneling of the shield machine 10, and improves the sealing performance. It can be understood that the telescopic rod 520 has a fixed end and a movable end, wherein the fixed end is welded to the second sealing ring 300, and the movable end is movably connected to the body 510, so that the body 510 can move forward or backward relative to the telescopic rod 520.

[0046] Compared with the prior art, the shield receiving sealing device in this embodiment can achieve the dual effects of static sealing and dynamic sealing through the arrangement of the airbag 200 and the driving assembly 500, that is, when the shield machine 10 is stationary and excavating, the shield receiving sealing device can seal between the shield machine 10 and the tunnel door ring, thereby improving the sealing performance. The arrangement of the first sealing ring 100, the second sealing ring 300 and the sealing ring 400 can ensure the reliability of the sealing, so that the shield machine 10 can excavate smoothly during the receiving process, ensuring the safety of the construction and the efficiency of the operation.

[0047] like Figure 1 As shown, in this embodiment, the shield receiving sealing device also includes an air compressor 600, which is connected to the airbag 200. The air compressor 600 can inflate or deflate the airbag 200 to put the airbag 200 in an inflated state or a deflated state.

[0048] Furthermore, the air compressor 600 in this embodiment is electrically connected to the controller 800 , and the controller 800 can control the working state of the air compressor 600 so that the air compressor 600 can inflate or deflate the airbag 200 .

[0049] It should be emphasized that the controller 800 in this embodiment is a conventional component in the art, for example, it can be a PLC controller, etc. Therefore, this embodiment will not elaborate on its specific structure and working principle.

[0050] Optionally, the airbag 200 in this embodiment is bonded to the first sealing ring 100, thereby ensuring the stability and reliability of the connection between the airbag 200 and the first sealing ring 100, and also facilitating the replacement and removal of the airbag 200 in the later stage. When the airbag 200 is in the inflated state, the airbag 200 can press the shield machine 10 and the first sealing ring 100, thereby ensuring the sealing performance; when the airbag 200 is in the deflated state, the airbag 200 can be separated from the shield machine 10, thereby facilitating the drive assembly 500 to drive the first sealing ring 100 and the airbag 200 to retract.

[0051] like Figure 1 As shown, optionally, the body 510 in this embodiment includes a hydraulic cylinder, one end of the telescopic rod 520 is movably connected to the hydraulic cylinder, and the other end of the telescopic rod 520 is fixedly connected to the second sealing ring 300. The driving assembly 500 also includes a hydraulic pump station 530, which is connected to the hydraulic cylinder and is configured to control the oil pressure of the hydraulic cylinder, thereby realizing the forward or backward movement of the hydraulic cylinder relative to the telescopic rod 520.

[0052] The controller 800 in this embodiment is electrically connected to the hydraulic cylinder, the hydraulic pump station 530 and the shield machine 10. The controller 800 can collect the excavation process data of the shield machine 10 in real time, and then feed the data back to the hydraulic pump station 530, so that the hydraulic pump station 530 can control the oil pressure in the hydraulic cylinder, thereby making the hydraulic cylinder consistent with the forward stroke of the shield machine 10, thereby ensuring the synchronous excavation of the shield machine 10, the hydraulic cylinder, the first sealing ring 100 and the airbag 200, so as to ensure the dynamic sealing performance of the shield receiving sealing device.

[0053] It should be noted that the hydraulic cylinder and the hydraulic pump station 530 in this embodiment are both common components on the market, and their structures and working principles are not described in detail here.

[0054] like Figure 1 As shown, in this embodiment, a limit member 700 is provided on the second sealing ring 300, and the limit member 700 is configured to limit the first sealing ring 100, so as to avoid the phenomenon that the first sealing ring 100 moves excessively and interferes with the floor wall 20, thereby improving the working efficiency.

[0055] Furthermore, the limiting member 700 in this embodiment is arranged in a ring shape, and the limiting member 700 is welded to the inner wall of the second sealing ring 300 , thereby improving the reliability and stability of the limiting member 700 limiting the first sealing ring 100 .

[0056] Optionally, in this embodiment, a connecting piece is provided on the main body 510, one end of the connecting piece is welded to the main body 510, and the other end is welded to the first sealing ring 100, thereby improving the reliability and stability of the main body 510 driving the first sealing ring 100 to move, and avoiding the phenomenon of the two being loosened or falling off.

[0057] Optionally, the first sealing ring 100 and the second sealing ring 300 in this embodiment are both metal parts. For example, the first sealing ring 100 and the second sealing ring 300 are both made of stainless steel, or both made of metal copper, so as to improve mechanical strength and extend service life.

[0058] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0059] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A shield receiving sealing device, used for sealing the gap between a shield machine (10) and a tunnel door ring, characterized in that: The shield receiving sealing device comprises: A first sealing ring (100), wherein the first sealing ring (100) is sleeved on the outer peripheral side of the shield machine (10); an airbag (200), the airbag (200) being arranged between the first sealing ring (100) and the shield machine (10), the airbag (200) having an inflated state and a deflated state; A second sealing ring (300), wherein the second sealing ring (300) is sleeved on the outer peripheral side of the first sealing ring (100), and a sealing ring (400) is provided between the second sealing ring (300) and the first sealing ring (100); A driving assembly (500), the driving assembly (500) comprising a body (510) and a telescopic rod (520), one end of the telescopic rod (520) being movably connected to the body (510), the other end of the telescopic rod (520) being fixedly connected to the second sealing ring (300), one end of the second sealing ring (300) being away from the driving assembly (500) being fixedly connected to a ground wall (20), the body (510) being fixedly connected to the first sealing ring (100), and the body (510) being capable of driving the first sealing ring (100) to reciprocate along the excavation direction of the shield machine (10).

2. The shield receiving sealing device according to claim 1, characterized in that: The shield receiving sealing device further comprises an air compressor (600), wherein the air compressor (600) is connected to the air bag (200), and the air compressor (600) is capable of inflating or deflating the air bag (200) so as to put the air bag (200) in an inflated state or a deflated state.

3. The shield receiving sealing device according to claim 2, characterized in that: The airbag (200) is adhesively connected to the first sealing ring (100); when the airbag (200) is in an inflated state, the airbag (200) can press the shield machine (10) and the first sealing ring (100); when the airbag (200) is in a deflated state, the airbag (200) can be separated from the shield machine (10).

4. The shield receiving sealing device according to claim 1, characterized in that: The main body (510) comprises a hydraulic cylinder, one end of the telescopic rod (520) is movably connected to the hydraulic cylinder, and the other end of the telescopic rod (520) is fixedly connected to the second sealing ring (300).

5. The shield receiving sealing device according to claim 4, characterized in that: The driving assembly (500) further comprises a hydraulic pump station (530), wherein the hydraulic pump station (530) is in communication with the hydraulic cylinder, and the hydraulic pump station (530) is configured to control the oil pressure of the hydraulic cylinder.

6. The shield receiving sealing device according to claim 1, characterized in that: A limiting member (700) is provided on the second sealing ring (300), and the limiting member (700) is configured to limit the position of the first sealing ring (100).

7. The shield receiving sealing device according to claim 6, characterized in that: The limiting member (700) is arranged in a ring shape, and the limiting member (700) is welded to the inner wall of the second sealing ring (300).

8. The shield receiving sealing device according to any one of claims 1 to 7, characterized in that: The first sealing ring (100) and the second sealing ring (300) are both metal parts.

9. The shield receiving sealing device according to any one of claims 1 to 7, characterized in that: The sealing ring (400) is a silicone member.

10. The shield receiving sealing device according to any one of claims 1 to 7, characterized in that: One end of the second sealing ring (300) is welded to the ground wall (20), and the other end of the second sealing ring (300) is welded to the telescopic rod (520).

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