A shield launching annular self-adapting sealing device

Abstract

The utility model discloses a kind of shield originating ring self-adapting sealing devices, including shield originating ring body, the outer end of the shield originating ring body is fixedly installed with multiple grouting pipes, the inner wall of the shield originating ring body is provided with self-adapting sealing assembly, the top of the shield originating ring body is provided with replacement component, the bottom of the replacement component is provided with loose early-warning component, loose early-warning component includes fixed groove, fixed groove is opened in the bottom of replacement component.The shield originating ring self-adapting sealing device, by setting loose early-warning component, in use, the firm degree of self-adapting rubber curtain installation can be monitored in real time, when curtain appears loose sign due to long-term use or external pressure, the relative position between contact head and inductor will change, sliding block generates displacement under the action of second spring, triggers early-warning signal, so that staff timely check and maintain, avoid construction risk caused by sealing failure.

Description

Technical Field

[0001] This utility model relates to the field of shield tunneling starting ring sealing technology, specifically a shield tunneling starting ring adaptive sealing device. Background Technology

[0002] The shield launching ring adaptive sealing device is mainly used to seal the annular gap between the shield machine and the portal steel ring during tunnel construction, preventing mud, water, soil and other substances from flowing into the working shaft and ensuring construction safety. During the launching or receiving of the shield machine, this device can effectively isolate water and soil pressure, avoid soil loss and ground settlement, and at the same time reduce construction difficulty and shorten the construction period.

[0003] Chinese patent CN213684120U discloses an extension ring device for the starting portal of a shield tunnel in water-rich sand layers. The device includes a pre-embedded steel ring embedded in the end face of the portal. A bearing ring is detachably and fixedly connected to the pre-embedded steel ring, and the bearing ring is coaxially arranged with the pre-embedded steel ring. From the inside out, a first sealing ring, a second sealing ring, and a third sealing ring are sequentially fixedly connected to the inner wall of the bearing ring for contact with the outer wall of the shield machine. During shield launching, the shield machine passes through the bearing ring and the pre-embedded steel ring sequentially into the portal. The first, second, and third sealing rings all contact the outer wall of the shield machine, achieving a seal between the shield machine and the portal. Furthermore, due to the use of a ring-shaped sealing structure, even after the shield machine detaches from the pre-embedded steel ring, the first, second, and third sealing rings can still contact the outer wall of the ring segment, continuing to provide a seal.

[0004] Adaptive rubber curtains may loosen due to long-term use or changes in external pressure, and may not be detected and adjusted immediately. This loosening can lead to a decrease in sealing performance, which in turn can cause the risk of mud and water leakage, thus affecting the stability of the construction area. Utility Model Content

[0005] The purpose of this invention is to provide a shield tunneling starting circumferential adaptive sealing device to solve the problem mentioned in the background art that the adaptive rubber curtain may loosen due to long-term use or changes in external pressure, and cannot be detected and adjusted in time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shield tunneling starting ring adaptive sealing device, including a shield tunneling starting ring body, a plurality of grouting pipes fixedly installed at the outer end of the shield tunneling starting ring body, an adaptive sealing component provided on the inner wall of the shield tunneling starting ring body, a replacement component provided on the top of the shield tunneling starting ring body, and a loosening early warning component provided at the bottom of the replacement component.

[0007] Preferably, the loosening warning component includes a fixing groove, which is formed at the bottom of the replacement component. A second spring is symmetrically fixedly installed inside the fixing groove. A sliding block is fixedly installed at the bottom of the two second springs. A contact head is fixedly installed on the inner side of the sliding block. A sensor is fixedly installed on the inner wall of the fixing groove.

[0008] Preferably, the adaptive sealing assembly includes a snap-fit ​​groove, which is formed on the top of the shield launching ring body. An installation plate is detachably connected inside the snap-fit ​​groove, and an adaptive rubber curtain is fixed to one side of the installation plate.

[0009] Preferably, the replacement component includes a mounting slot, which is formed on the top of the shield launching ring body. A guide rod is fixedly installed inside the mounting slot, and a first spring is sleeved on the outer end of the guide rod.

[0010] Preferably, a sleeve is slidably connected to the outer end of the guide rod, a pressing plate is fixedly installed on the top of the sleeve, and a reinforcing block is fixedly installed on the bottom of the pressing plate.

[0011] Preferably, the contact head and the sensor are slidably connected, and the two ends of the second spring are fixedly connected to the fixing groove and the sliding block, respectively, with the fixing groove located at the bottom of the reinforcing block.

[0012] Preferably, the adaptive rubber curtain is located on the inner wall of the shield tunneling starting ring body, and the mounting plate and the snap-fit ​​groove are size-adapted.

[0013] Preferably, the reinforcing block penetrates the interior of the mounting plate, and the two ends of the first spring are fixedly connected to the mounting groove and the sleeve, respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By setting up a loosening warning component, the firmness of the adaptive rubber curtain installation can be monitored in real time during use. When the curtain shows signs of loosening due to long-term use or external pressure, the relative position between the contact head and the sensor will change, and the sliding block will be displaced under the action of the second spring, triggering a warning signal so that staff can check and maintain it in time and avoid construction risks caused by seal failure.

[0016] 2. By setting up replacement components, the convenience of replacement operations has been further optimized. When it is necessary to repair or replace related parts, press the pressing plate to make the sleeve slide along the guide rod, the first spring is compressed, and the reinforcing block is detached from the mounting plate, so that the disassembly of the parts can be easily completed. The operation is simple and efficient, which greatly shortens the maintenance time and ensures the continuity of construction. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial schematic diagram of the front cross-section of the structure of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the replacement component of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the loosening warning component of this utility model;

[0021] Figure 5 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Shield launching ring body; 2. Grouting pipe; 31. Clip groove; 32. Mounting plate; 33. Adaptive rubber curtain; 41. Mounting groove; 42. Guide rod; 43. First spring; 44. Sleeve; 45. Pressing plate; 46. Reinforcing block; 51. Fixing groove; 52. Second spring; 53. Sliding block; 54. Contact head; 55. Sensor. 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] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4This utility model provides a technical solution: a shield tunneling machine (TBM) launching ring adaptive sealing device, including a TBM launching ring body 1, multiple grouting pipes 2 fixedly installed at the outer end of the TBM launching ring body 1, an adaptive sealing assembly provided on the inner wall of the TBM launching ring body 1, a replacement assembly provided on the top of the TBM launching ring body 1, and a loosening warning assembly provided at the bottom of the replacement assembly. The loosening warning assembly includes a fixing groove 51, which is opened at the bottom of the replacement assembly. Two second springs 52 are symmetrically fixedly installed inside the fixing groove 51. A sliding block 53 is fixedly installed at the bottom of the 2, and a contact head 54 is fixedly installed on the inner side of the sliding block 53. A sensor 55 is fixedly installed on the inner wall of the fixing groove 51. The contact head 54 and the sensor 55 are slidably connected. The two ends of the second spring 52 are fixedly connected to the fixing groove 51 and the sliding block 53 respectively. The fixing groove 51 is located at the bottom of the reinforcing block 46 and can monitor the degree of adhesion of the adaptive rubber curtain 33 in real time so that the staff can understand the working status of the sealing device in time and take corresponding maintenance or replacement measures to avoid construction risks caused by sealing failure.

[0025] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 The adaptive sealing component includes a snap-fit ​​groove 31, which is located on the top of the shield launching ring body 1. A mounting plate 32 is detachably connected inside the snap-fit ​​groove 31. An adaptive rubber curtain 33 is fixed to one side of the mounting plate 32 and is located on the inner wall of the shield launching ring body 1. The mounting plate 32 and the snap-fit ​​groove 31 are sized to match, allowing for automatic adjustment of the sealing state according to the dynamic conditions during shield construction. The detachable connection design between the snap-fit ​​groove 31 and the mounting plate 32 facilitates quick replacement and maintenance of the adaptive rubber curtain 33, ensuring that the curtain always fits tightly against the inner wall of the shield launching ring body 1, effectively improving the reliability and durability of the seal. The replacement component includes a mounting groove 41, which is located on the shield launching ring body. At the top of the mounting plate 32, a guide rod 42 is fixedly installed inside the mounting groove 41. A first spring 43 is sleeved on the outer end of the guide rod 42. A sleeve 44 is slidably connected to the outer end of the guide rod 42. A pressing plate 45 is fixedly installed on the top of the sleeve 44. A reinforcing block 46 is fixedly installed on the bottom of the pressing plate 45. The reinforcing block 46 penetrates the interior of the mounting plate 32. The two ends of the first spring 43 are fixedly connected to the mounting groove 41 and the sleeve 44 respectively. By simply pulling the pressing plate 45 upward, the sleeve 44 moves upward along the guide rod 42 under the return force of the first spring 43, which drives the reinforcing block 46 to be pulled out from the mounting plate 32, thereby releasing the fixation of the mounting plate 32. The whole operation process is convenient and efficient, without the need for complicated tools, which greatly shortens the time and cost of maintenance and replacement.

[0026] Working principle: When the tunnel boring machine starts to excavate, the adaptive rubber curtain 33 in the adaptive sealing component will deform under the compression of the tunnel boring machine shell, tightly adhering to the surface of the tunnel boring machine to form an initial seal. As the tunnel boring machine's posture is slightly adjusted during the excavation process, the adaptive rubber curtain 33 can further adapt to the curvature changes of the shell with its own elasticity, always maintaining a good sealing effect.

[0027] During long-term use of the sealing device, if the adaptive rubber curtain 33 wears down and the fit decreases, the loosening warning component will monitor it in real time. When the relative position between the contact head 54 and the sensor 55 changes due to the loosening of the curtain and triggers the sensing signal, the staff can be notified in time through the connected control system.

[0028] At this time, maintenance is performed using the replacement component. Pull the pressing plate 45 upward to disengage the reinforcing block 46 from the mounting plate 32, remove the old mounting plate 32 from the snap-fit ​​groove 31, replace it with a new mounting plate 32 with an adaptive rubber curtain 33, release the pressing plate 45, the first spring 43 pushes the sleeve 44 downward, causing the reinforcing block 46 to be reinserted into the new mounting plate 32 to complete the fixation. The above is the working process of the entire device, and all contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shield tunneling machine initiation circumferential adaptive sealing device, characterized in that: The shield tunneling starting ring body (1) includes a shield tunneling starting ring body (1) with multiple grouting pipes (2) fixedly installed at the outer end of the shield tunneling starting ring body (1), an adaptive sealing component is provided on the inner wall of the shield tunneling starting ring body (1), a replacement component is provided on the top of the shield tunneling starting ring body (1), and a loosening warning component is provided at the bottom of the replacement component. The loosening warning component includes a fixing groove (51), which is located at the bottom of the replacement component. A second spring (52) is symmetrically fixed inside the fixing groove (51). A sliding block (53) is fixedly installed at the bottom of the two second springs (52). A contact head (54) is fixedly installed on the inner side of the sliding block (53). A sensor (55) is fixedly installed on the inner wall of the fixing groove (51).

2. The shield tunneling starting circumferential adaptive sealing device according to claim 1, characterized in that: The adaptive sealing assembly includes a snap-fit ​​groove (31) which is located on the top of the shield starting ring body (1). An installation plate (32) is detachably connected inside the snap-fit ​​groove (31), and an adaptive rubber curtain (33) is fixed on one side of the installation plate (32).

3. The shield tunneling initiation circumferential adaptive sealing device according to claim 1, characterized in that: The replacement component includes a mounting slot (41) which is located on the top of the shield launching ring body (1). A guide rod (42) is fixedly installed inside the mounting slot (41), and a first spring (43) is sleeved on the outer end of the guide rod (42).

4. The shield tunneling starting circumferential adaptive sealing device according to claim 3, characterized in that: The outer end of the guide rod (42) is slidably connected to a sleeve (44), a pressing plate (45) is fixedly installed on the top of the sleeve (44), and a reinforcing block (46) is fixedly installed on the bottom of the pressing plate (45).

5. The shield tunneling starting circumferential adaptive sealing device according to claim 1, characterized in that: The contact head (54) and the sensor (55) are slidably connected, and the two ends of the second spring (52) are fixedly connected to the fixing groove (51) and the sliding block (53) respectively. The fixing groove (51) is located at the bottom of the reinforcing block (46).

6. The shield tunneling starting circumferential adaptive sealing device according to claim 2, characterized in that: The adaptive rubber curtain (33) is located on the inner wall of the shield starting ring body (1), and the mounting plate (32) and the snap-fit ​​groove (31) are size-matched.

7. A shield tunneling initiation circumferential adaptive sealing device according to claim 4, characterized in that: The reinforcing block (46) penetrates the interior of the mounting plate (32), and the two ends of the first spring (43) are fixedly connected to the mounting groove (41) and the sleeve (44) respectively.

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