A device for repositioning and reinstalling the cutterhead of a tunnel boring machine.

Abstract

This utility model discloses a device for resetting and reinstalling a shield tunnel cutterhead inside a tunnel, belonging to the field of shield tunneling machinery and equipment. It includes multiple temporary fixing supports for temporarily securing the cutterhead; multiple support platforms are arranged at intervals along the circumference of the cutterhead, with one end of each platform passing through the gap in the cutterhead and abutting against the cutterhead support position, and the other end fixedly connected to the front shield soil chamber partition of the shield machine, forming a support system; multiple resetting mechanisms are correspondingly arranged with the multiple support platforms, and the fixed ends of the resetting mechanisms are respectively fixed to the corresponding support platforms, while the moving ends are all fixed to the cutterhead, used to achieve cutterhead resetting. This utility model installs translation cylinders and lifting cylinders, improving the efficiency and accuracy of shield cutterhead resetting and reinstallation. Throughout the entire resetting and reinstallation process, it improves operational efficiency, reduces labor intensity, and ensures safety, demonstrating good application results.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling equipment, specifically, it relates to a device for resetting and reinstalling the shield cutterhead inside a tunnel. Background Technology

[0002] Currently, the common method for resetting a detached cutterhead in a tunnel is to reinforce the ground, open a vertical shaft, and use a large crane to reassemble the cutterhead. This method is costly and is generally subject to significant restrictions from ground traffic. Therefore, there is an urgent need for a device for resetting and reassembling the cutterhead in a tunnel, so as to achieve safe and stable resetting and reassembling of the cutterhead in the tunnel. Utility Model Content

[0003] To achieve the above objectives, the present invention adopts the following technical solution:

[0004] A device for repositioning and reinstalling the cutterhead of a tunnel boring machine (TBM) includes:

[0005] Multiple temporary fixed supports, the first end of each of the multiple temporary fixed supports is fixedly connected to the upper part of the cutterhead, and the second end is fixedly connected to the front shield soil chamber partition of the tunnel boring machine, for the purpose of temporarily fixing the cutterhead;

[0006] Multiple support platforms are arranged at intervals along the circumference of the cutterhead. One end of each support platform passes through the gap of the cutterhead and abuts against the support position of the cutterhead, while the other end is fixedly connected to the front shield soil chamber partition of the tunnel boring machine to form a support system.

[0007] Multiple reset mechanisms are provided, each corresponding to one of the multiple support platforms. The fixed end of each reset mechanism is fixed to the corresponding support platform, and the movable end is fixed to the cutter head, for the purpose of resetting the cutter head.

[0008] Furthermore, the temporary fixed support is an H-beam.

[0009] Furthermore, the reset mechanism includes:

[0010] Multiple translation cylinders are provided, and the multiple translation cylinders are correspondingly arranged with the support platform. The multiple translation cylinders are all arranged between the cutterhead and the front shield soil chamber partition of the tunnel boring machine. The fixed ends of the translation cylinders are respectively fixed to the corresponding support platform through lugs, and the moving ends are respectively fixedly connected to the cutterhead through lugs.

[0011] Multiple lifting cylinders are provided, each corresponding to one of the multiple support platforms. The lifting cylinders are all located on the front of the cutter head. The front of the cutter head is provided with multiple anti-standing seats, each corresponding to one of the lifting cylinders. The fixed ends of the lifting cylinders are fixedly connected to the corresponding support platforms, and the moving ends are fixedly connected to the corresponding anti-standing seats.

[0012] Furthermore, the support platform includes a first support platform, a second support platform, a third support platform, and a fourth support platform, wherein the first support platform and the second support platform are respectively located on both sides of the upper part of the cutter head, and the third support platform and the fourth support platform are respectively located on both sides of the lower part of the cutter head.

[0013] Furthermore, the first support platform has the same structure as the second support platform, and the first support platform includes:

[0014] The first box-shaped crossbeam has one end passing through the gap of the cutterhead and abutting against the support position of the cutterhead, and the other end being fixedly connected to the front shield soil chamber partition of the tunnel boring machine.

[0015] The inclined support has its first end fixedly connected to the first box-shaped crossbeam and its second end fixed to the front shield soil chamber partition of the tunnel boring machine.

[0016] Furthermore, the third support platform has the same structure as the fourth support platform, and the third support platform includes:

[0017] The second box-shaped crossbeam has one end passing through the gap of the cutterhead and abutting against the cutterhead support position, and the other end is fixedly connected to the shield soil chamber partition of the tunnel boring machine.

[0018] The first box-type support has its first end fixedly connected to the second box-type crossbeam, and its second end fixed to the ground.

[0019] The beneficial effects of this utility model are:

[0020] This utility model installs translational and lifting hydraulic cylinders to improve the efficiency and accuracy of shield cutterhead repositioning and reinstallation. Throughout the entire repositioning and reinstallation process, it improves work efficiency, reduces labor intensity, and ensures safety, demonstrating excellent application results.

[0021] This utility model designs and manufactures a support platform. The main material is a 40mm thick Q345B steel plate, which is spliced ​​to form a steel box girder structure. This device has the advantages of small space occupation, strong load-bearing capacity, and the ability to safely hoist, move, and install large structural components. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the temporary support position of a device for resetting and reinstalling a shield cutterhead in a tunnel, according to the present invention.

[0023] Figure 2 This is a side view of the temporary support position of a device for resetting and reinstalling a shield cutterhead in a tunnel, according to the present invention.

[0024] Figure 3 This is a schematic diagram of the main view of the support platform and adjustable support of the device for resetting and reinstalling the shield cutterhead in a tunnel according to the present invention.

[0025] Figure 4 This is a side view schematic diagram of the support platform and adjustable support of the device for resetting and reinstalling the shield cutterhead in a tunnel according to the present invention.

[0026] Figure 5 This is a schematic diagram of the main view of the reset mechanism of a device for resetting and reinstalling a shield cutterhead in a tunnel, according to the present invention.

[0027] Figure 6 This is a side view schematic diagram of the reset mechanism of a device for resetting and reinstalling a shield cutterhead in a tunnel, according to the present invention.

[0028] Figure 7 This is a schematic diagram of the cutter head after adjustment.

[0029] In the diagram: 1. Cutterhead; 2. Temporary fixed support; 3. First support platform; 4. Second support platform; 5. Third support platform; 6. Fourth support platform; 7. Adjustable support; 8. Translation cylinder; 9. Lifting cylinder; 10. Front shield soil chamber partition of the tunnel boring machine; 11. Anti-standing support. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] refer to Figures 1 to 7 A device for repositioning and reinstalling the cutterhead of a tunnel boring machine (TBM) includes:

[0033] Multiple temporary fixed supports 2, the first end of each of the multiple temporary fixed supports 2 is fixedly connected to the upper part of the cutterhead 1, and the second end is fixedly connected to the front shield soil chamber partition 10 of the tunnel boring machine, for the purpose of temporarily fixing the cutterhead 1;

[0034] Multiple support platforms are arranged at intervals along the circumference of the cutterhead 1. One end of the support platform passes through the gap of the cutterhead 1 and abuts against the support position of the cutterhead 1, while the other end is fixedly connected to the shield soil chamber partition 10 of the shield machine to form a support system.

[0035] Multiple reset mechanisms are provided, each corresponding to a support platform. The fixed ends of the reset mechanisms are fixed to the corresponding support platforms, while the moving ends are all fixed to the cutter head 1, in order to achieve the reset of the cutter head 1.

[0036] This utility model's installation and reinstallation mechanism improves the efficiency and accuracy of shield cutterhead reinstallation and reassembly. Throughout the entire reinstallation and reassembly process, it increases operational efficiency, reduces labor intensity, and ensures safety, demonstrating excellent application results.

[0037] Example 2

[0038] To improve practicality, this embodiment has been further modified based on embodiment 1.

[0039] In this embodiment, the temporary fixed support 2 is an H-beam.

[0040] Preferably, the temporary fixed support 2 consists of four 200*200*8*12 H-shaped steel sections.

[0041] In this embodiment, the reset mechanism includes:

[0042] Multiple translation cylinders are provided, and multiple translation cylinders are set in correspondence with the support platform. All multiple translation cylinders are set between the cutterhead 1 and the front shield soil chamber partition 10 of the tunnel boring machine. The fixed ends of the translation cylinders are fixed to the corresponding support platform through ear seats, and the moving ends are fixedly connected to the cutterhead 1 through ear seats.

[0043] Multiple lifting cylinders are provided, and multiple lifting cylinders are correspondingly set with support platforms. Multiple lifting cylinders are all set on the front of the cutter head 1. Multiple anti-standing seats 11 are provided on the front of the cutter head 1. Multiple anti-standing seats 11 are correspondingly set with multiple lifting cylinders. The fixed ends of multiple lifting cylinders are fixedly connected to the corresponding support platforms, and the moving ends are fixedly connected to the corresponding anti-standing seats 11.

[0044] In this embodiment, the support platform includes a first support platform 3, a second support platform 4, a third support platform 5, and a fourth support platform 6. The first support platform 3 and the second support platform 4 are located on both sides of the upper part of the cutter head 1, and the third support platform 5 and the fourth support platform 6 are located on both sides of the lower part of the cutter head 1.

[0045] In this embodiment, the first support platform 3 and the second support platform 4 have the same structure. The first support platform 3 includes:

[0046] The first box-shaped crossbeam has one end passing through the gap of the cutterhead 1 and abutting against the support position of the cutterhead 1, and the other end is fixedly connected to the shield soil chamber partition 10 of the shield machine.

[0047] The inclined support has its first end fixedly connected to the first box-shaped crossbeam and its second end fixed to the shield soil chamber partition 10 of the tunnel boring machine.

[0048] In this embodiment, the third support platform 5 and the fourth support platform 6 have the same structure. The third support platform 5 includes:

[0049] The second box-shaped crossbeam has one end passing through the gap of the cutterhead 1 and abutting against the support position of the cutterhead 1, and the other end is fixedly connected to the shield soil chamber partition 10 of the shield machine.

[0050] The first box-type support has its first end fixedly connected to the second box-type crossbeam, and its second end fixed to the ground.

[0051] In specific implementation, the main materials of the first support platform 3, the second support platform 4, the third support platform 5, and the fourth support platform 6 are selected from 40mm thick Q345B steel plates and welded together to form a steel box girder structure. It has the characteristics of high strength, good toughness, convenient construction, and strong load-bearing capacity. By splicing the steel plates to form a steel box girder structure, this device has the advantages of small space occupation, strong load-bearing capacity, and the ability to safely hoist, move, and install large structural components.

[0052] Preferably, the first box-type crossbeam and the second box-type crossbeam are 400*400*35*3 box-type crossbeams, and the diagonal brace and the first box-type brace are 300*300*16*16 box-type braces.

[0053] In practice, each platform is calculated to withstand a load of 80 tons. The load analysis results show that the load requirements are met. However, since the beams and supports used are too large to be transported into the soil silo as a whole, they are cut into pieces on the ground, transported from the personnel warehouse to the soil silo, and then assembled and welded inside the soil silo.

[0054] In practice, the steel plates are connected by welding, and after passing UT and PT 100% flaw detection, they meet the requirements for on-site use.

[0055] Example 3

[0056] To ensure smooth movement during the leveling process of the cutter head, this embodiment makes further modifications based on embodiment 1 or embodiment 2.

[0057] In this embodiment, an adjustable support 7 is also included. The adjustable support 7 is located at the lower middle position of the cutter head 1 with an adjustable height, and is used to adjust the gap between the support platform and the cutter head 1.

[0058] In this embodiment, the adjustable support 7 includes:

[0059] The third box-shaped crossbeam has its first end fixedly connected to the shield soil chamber partition 10 of the shield machine, and its second end extends to the lower side of the cutterhead 1 bearing.

[0060] The fourth box-shaped crossbeam is located above the third box-shaped crossbeam, and the upper surface of the fourth box-shaped crossbeam abuts against the bearing of the cutter head 1.

[0061] The second box-type support has its first end fixedly connected to the third box-type crossbeam, and its second end fixed to the ground.

[0062] In practical implementation, five sets of supports were designed and manufactured, namely the first support platform 3, the second support platform 4, the third support platform 5, the fourth support platform 6, and the adjustable support 7. The main material is 40mm thick Q345B steel plate, which is spliced ​​and welded into a steel box girder structure. It has the characteristics of high strength, good toughness, convenient construction, and strong load-bearing capacity. By splicing steel plates to form a steel box girder structure, this device has the advantages of small space occupation, strong load-bearing capacity, and the ability to safely hoist, move, and install large structural components.

[0063] Preferably, the first box-type crossbeam, the second box-type crossbeam, the third box-type crossbeam, and the fourth box-type crossbeam are 400*400*35*3 box-type crossbeams, and the diagonal brace, the first box-type brace, and the second box-type brace are 300*300*16*16 box-type braces.

[0064] In practice, each platform is calculated to withstand a load of 80 tons. The load analysis results show that the load requirements are met. However, since the beams and supports used are too large to be transported into the soil silo as a whole, they are cut into pieces on the ground, transported from the personnel warehouse to the soil silo, and then assembled and welded inside the soil silo.

[0065] In practice, the steel plates are connected by welding, and after passing UT and PT 100% flaw detection, they meet the requirements for on-site use.

[0066] Example 4

[0067] This embodiment provides a method for resetting and reinstalling a shield cutterhead inside a tunnel, using a device for resetting and reinstalling a shield cutterhead inside a tunnel as described in Embodiment 2 or Embodiment 3. The method includes the following steps:

[0068] S10. Fix the inclined cutterhead 1 to the shield soil chamber partition 10 of the tunnel boring machine using temporary fixed support 2.

[0069] The upper part of the cutter head 1 is temporarily fixed with multiple H-beams;

[0070] S20, the construction of the tool head 1 support platform and reset mechanism;

[0071] Based on the tunnel clearance and the actual space and location parameters on site, multiple support platforms were installed. Each support platform underwent stress analysis and calculation to meet the load requirements.

[0072] S30, Move and level the cutter head 1;

[0073] S31. After the excavation of the soil is completed and the hand chain hoist is installed on the upper part, remove the multiple temporary fixed supports 2 of the cutterhead 1 after the installation is completed;

[0074] In practice, four 10-ton manual chain hoists are installed. The cross brace supporting the cutter head is rigidly connected to the cutter head, which can directly cut off the upper fixed steel section. At the same time, the four upper 10T hoists can be used for assistance.

[0075] S32. Translation cylinders 8 are installed on the support platform respectively. Two welded lugs are used to fix the translation cylinders 8. One lug is welded to the cross brace platform of the corresponding support platform, and the other is welded to the cutter head 1. The cutter head 1 is moved horizontally by the translation cylinders 8. The hydraulic pump station is used to control the horizontal translation cylinders to move forward and adjust the cutter head 1 to vertical. During the leveling process of the cutter head 1, adjustable supports 7 are used to ensure that the support positions of multiple support platforms and the cutter head 1 are reserved with adjustable gaps to ensure smooth movement.

[0076] In practice, each of the four support platforms is equipped with a translation cylinder. Four cylinders with a push-pull force of 50T and a stroke of 600mm are used. A hydraulic pump station is used to control the horizontal movement cylinder 4 to move forward and adjust the cutter head to be vertical.

[0077] S40, Cutter head 1 lifting;

[0078] Multiple counter-supports 11 are welded to the front of the cutter head 1, and multiple lifting cylinders 9 (50T) are installed between the corresponding support platform and the counter-supports 11. The cutter head 1 is lifted by lifting the corresponding support platform and the counter-supports 11.

[0079] S50. Reset and reinstall the tool turret.

[0080] Example 5

[0081] This embodiment takes the Nanjing tunnel boring machine project as an example. In the entire process of resetting and reinstalling the cutterhead, it improved the operation efficiency, reduced the labor intensity, and ensured safety, with good application results.

[0082] Economic Benefits: Existing technology: 20 workers, 300 yuan / day / person; construction period: 60 days; labor cost = 20 * 300 * 60 = 360,000 yuan; shaft reinforcement and hoisting costs nearly 10 million yuan. Using this device: 15 workers, 300 yuan / day / person; construction period: 45 days; labor cost = 15 * 300 * 45 = 202,500 yuan; saving 157,500 yuan in labor costs per unit. Currently, the dismantling and installation of one shield tunneling machine's auger has been completed, generating a total direct economic benefit of 157,500 yuan and saving nearly 10 million yuan in shaft reinforcement and hoisting costs. Based on the above analysis, after the application of this technology in the shield tunneling industry, assuming that China Railway has 1000 conventional diameter shield tunneling machines, and 2% of these machines require auger dismantling and installation in tunnels annually, the total economic benefit could reach 3.15 million yuan per year.

[0083] Social benefits: The application of this device has shortened the operation time for resetting and reinstalling the shield cutterhead in the tunnel. Throughout the implementation process, reasonable matching and coordination of work have enabled the safe and stable resetting and reinstallation of the shield cutterhead in the tunnel, which has been well received by the Nanjing Metro owners.

[0084] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A device for resetting and reinstalling the cutterhead of a tunnel boring machine (TBM) inside a tunnel, characterized in that, include: Multiple temporary fixed supports, the first end of each of the multiple temporary fixed supports is fixedly connected to the upper part of the cutterhead, and the second end is fixedly connected to the front shield soil chamber partition of the tunnel boring machine, for the purpose of temporarily fixing the cutterhead; Multiple support platforms are arranged at intervals along the circumference of the cutterhead. One end of each support platform passes through the gap of the cutterhead and abuts against the support position of the cutterhead, while the other end is fixedly connected to the front shield soil chamber partition of the tunnel boring machine to form a support system. Multiple reset mechanisms are provided, each corresponding to one of the multiple support platforms. The fixed end of each reset mechanism is fixed to the corresponding support platform, and the movable end is fixed to the cutter head, for the purpose of resetting the cutter head.

2. The device for resetting and reinstalling the shield cutterhead in a tunnel according to claim 1, characterized in that, The temporary fixed support is an H-beam.

3. The device for resetting and reinstalling the shield cutterhead in a tunnel according to claim 1, characterized in that, The reset mechanism includes: Multiple translation cylinders are provided, and the multiple translation cylinders are correspondingly arranged with the support platform. The multiple translation cylinders are all arranged between the cutterhead and the front shield soil chamber partition of the tunnel boring machine. The fixed ends of the translation cylinders are respectively fixed to the corresponding support platform through lugs, and the moving ends are respectively fixedly connected to the cutterhead through lugs. Multiple lifting cylinders are provided, each corresponding to one of the multiple support platforms. The lifting cylinders are all located on the front of the cutter head. The front of the cutter head is provided with multiple anti-standing seats, each corresponding to one of the lifting cylinders. The fixed ends of the lifting cylinders are fixedly connected to the corresponding support platforms, and the moving ends are fixedly connected to the corresponding anti-standing seats.

4. The device for resetting and reinstalling the shield cutterhead in a tunnel according to claim 1, characterized in that, The support platform includes a first support platform, a second support platform, a third support platform, and a fourth support platform, wherein the first support platform and the second support platform are respectively located on both sides of the upper part of the cutter head, and the third support platform and the fourth support platform are respectively located on both sides of the lower part of the cutter head.

5. The device for resetting and reinstalling the shield cutterhead in a tunnel according to claim 4, characterized in that, The first support platform has the same structure as the second support platform, and the first support platform includes: The first box-shaped crossbeam has one end passing through the gap of the cutterhead and abutting against the support position of the cutterhead, and the other end being fixedly connected to the front shield soil chamber partition of the tunnel boring machine. The inclined support has its first end fixedly connected to the first box-shaped crossbeam and its second end fixed to the front shield soil chamber partition of the tunnel boring machine.

6. The device for resetting and reinstalling the shield cutterhead in a tunnel according to claim 4, characterized in that, The third support platform has the same structure as the fourth support platform, and the third support platform includes: The second box-shaped crossbeam has one end passing through the gap of the cutterhead and abutting against the cutterhead support position, and the other end is fixedly connected to the shield soil chamber partition of the tunnel boring machine. The first box-type support has its first end fixedly connected to the second box-type crossbeam, and its second end fixed to the ground.

Images