A reusable extension sleeve for adjusting the tunneling angle of a tunneling machine

Abstract

This invention discloses a reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine (TBM). It includes a fixed section hinged to an adjustable section. A sealing device is located at the hinge between the fixed section and the adjustable section. Several adjusting devices are circumferentially evenly distributed on the fixed section and the adjustable section. Each adjusting device includes a hydraulic cylinder, one end of which is located on the fixed section, and the other end is connected to the adjustable section. The fixed section and the adjustable section prevent groundwater or mud from leaking into the working shaft through the portal gap. The circumferentially distributed hydraulic cylinders control the adjustable angle, allowing the cutterhead of the TBM to pass through the launching portal synchronously and smoothly during launch. This design is suitable for launching portals with different angles, ensuring a smooth launch of the TBM. A standard section of the fixed section is used to connect to a pre-embedded portal ring plate via bolt assemblies, making the device easy to disassemble and recycle, reusable, and effectively reducing construction costs.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) launching technology, and in particular to a reusable extension sleeve for adjusting the tunneling angle of a TBM. Background Technology

[0002] During the conventional initial excavation of a tunnel boring machine (TBM), the starting axis of the TBM should be aligned with the centerline of the tunnel. The working shaft end wall portal ring plate and the installation of a curtain rubber plate device for sealing are often used to ensure the smooth start of the TBM. This ensures that the TBM enters the soil safely and smoothly during the initial stage and prevents groundwater or mud from seeping into the working shaft through the portal gap.

[0003] However, in actual engineering projects, due to limitations such as site topography, existing buildings, or route planning, there is an angle between the starting axis of some working shafts and the tunnel axis. This causes the cutterhead on both sides to not pass through the portal ring plate synchronously when the tunnel boring machine starts. If the conventional starting mode is used, there may be hidden dangers of portal seal damage or poor sealing performance, which will affect the safety of tunnel boring machine starting construction. Secondly, the conventional starting mode requires the temporary construction of adjustment devices. Since the requirements for adjustment devices are different in different construction environments, the adjustment devices are often difficult to reuse, resulting in high construction costs. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned background technology, the purpose of this invention is to provide a reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine. By changing the angle between the starting axis and the tunnel axis, it can meet the sealing requirements of the starting tunnel portal at different angles. It is highly adaptable, ensuring the smooth starting of the tunnel boring machine, and is easy to disassemble and recycle. It can be reused and can effectively reduce construction costs.

[0005] The technical solution is: a reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine, characterized in that it includes:

[0006] The fixed section is hinged to an adjustable section, which is able to deflect relative to the fixed section within a predetermined angle range.

[0007] A sealing device is provided at the fixed section and the adjustable hinge;

[0008] An adjustment device, wherein a plurality of adjustment devices are circumferentially evenly arranged on the fixed section and the adjustable section, the adjustment device including a hydraulic cylinder connecting the fixed section and the adjustable section, the hydraulic cylinder being used to drive the adjustable section to deflect at an angle relative to the fixed section, and when the adjustable section deflects, the sealing device being used to maintain a seal at the hinge.

[0009] As a further preferred embodiment, the plurality of adjustment devices are divided into four groups, which are respectively arranged on the fixed section and the adjustable upper, lower, left and right positions, with each group containing at least two adjustment devices.

[0010] As a further preferred embodiment, the fixed section includes a standard section for rigid connection with the pre-embedded hole door ring plate via fasteners, thereby facilitating disassembly and recycling of the device; the standard section is connected to a hinged section for hinged engagement with the adjustable section, allowing the adjustable section to deflect relative to the fixed section within a predetermined angle range.

[0011] As a further preferred embodiment, the adjustable section includes an adjustable standard section, which is connected to an adjustable hinge section. The adjustable hinge section is hinged to the fixed section hinge section, and the hydraulic cylinder is connected to the adjustable standard section.

[0012] As a further preferred embodiment, the diameter of the adjustable hinge section is smaller than the diameter of the fixed hinge section, providing the necessary space for the adjustable section to deflect relative to the fixed section, effectively preventing mechanical interference between the two components during movement.

[0013] As a further preferred embodiment, the hydraulic cylinder includes a connecting rod disposed on the fixed standard section, a hydraulic oil pipe body disposed on the connecting rod, a chamber formed within the hydraulic oil pipe body, a hydraulic cylinder piston sealing device slidably connected within the chamber, a hydraulic cylinder piston rod disposed on the hydraulic cylinder piston sealing device and slidably connected to the hydraulic oil pipe body, the hydraulic cylinder piston rod being connected to the adjustable standard section, and the hydraulic oil pipe body being provided with a hydraulic oil pipe interface one and a hydraulic oil pipe interface two, the hydraulic oil pipe interface one and the hydraulic oil pipe interface two being used to input or output hydraulic oil into or out of the chamber.

[0014] As a further preferred embodiment, the movable cylinder piston sealing device divides the chamber into a rodless chamber and a rod chamber. The first hydraulic oil pipe interface is connected to the rodless chamber, and the second hydraulic oil pipe interface is connected to the rod chamber. The hydraulic oil in the rodless chamber is input or output through the first hydraulic oil pipe interface, and the hydraulic oil in the rod chamber is input or output through the second hydraulic oil pipe interface.

[0015] As a further preferred embodiment, the sealing device includes a plurality of grease holes disposed in the hinge section of the fixed section, two detachable rubber sealing rings disposed in the sealing groove of the adjustable hinge section, and a ball valve disposed on the side of the grease holes away from the rubber sealing rings.

[0016] As a further preferred embodiment, the grease hole is located between the two rubber sealing rings.

[0017] As a further preferred embodiment, the number of grease holes is ten, which are evenly distributed circumferentially along the hinge section of the fixed joint.

[0018] The present invention has the following advantages:

[0019] The fixed section and adjustable section are used to prevent groundwater or mud from seeping into the working shaft through the gap in the tunnel portal. Through circumferentially distributed hydraulic cylinders, the adjustable angle can be actively and precisely controlled, so that the cutterhead can pass through the launching portal synchronously and smoothly when the tunnel boring machine body is launched. This makes it suitable for launching portals with different angles, and ultimately solves the sealing requirements of launching portals with different angles. It has strong adaptability and ensures the smooth launch of the tunnel boring machine. The standard section of the fixed section is used to connect with the pre-embedded portal ring plate through bolt assembly, which makes the device easy to disassemble and recycle, and can be reused, effectively reducing construction costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0021] Figure 2 This is a schematic diagram showing the connection relationship between the fixed section, the adjustable section, and the adjustment device of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the fixing section of the present invention.

[0023] Figure 4 This is a schematic diagram of the adjustable structure of the present invention.

[0024] Figure 5 This is a schematic diagram illustrating the connection between the fixed section and the adjustable section of the present invention.

[0025] Figure 6 This describes the connection relationship between the fixed section, the adjustable section, and the sealing device of the present invention.

[0026] Figure 7 This is a cross-sectional view of the adjustment device of the present invention.

[0027] Figure 8 This is a schematic diagram of the left-hand structure of the hydraulic cylinder stroke adjustment under the R250m horizontal curve of the present invention.

[0028] Figure 9 This is a schematic diagram of the installation of the present invention.

[0029] Among them: 1-starting end wall, 2-extension sleeve installation position, 3-shield machine body, 4-starting bracket, 5-tunnel axis, 6-starting axis, 21-fixed section standard section, 22-fixed section articulated section, 23-adjustable standard section, 24-adjustable articulated section, 25-rubber sealing ring, 26-grease hole, 27-ball valve, 71-hydraulic oil pipe interface one, 72-rodless chamber, 73-cylinder piston sealing device, 74-rod chamber, 75-cylinder piston rod, 76-hydraulic oil pipe interface two, 77-hydraulic oil pipe body, 78-connecting rod, 8-R250m horizontal curve. Detailed Implementation

[0030] The technical solution will be further described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used herein refer only to the position of the illustrated structure in the corresponding drawings. The component numbers used herein, such as "first," "second," etc., are merely for distinguishing the described objects and have no sequential or technical meaning. Furthermore, terms such as "connection" and "linkage," unless otherwise specified, include both direct and indirect connections.

[0031] like Figures 1 to 9 The diagram shows a reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine, comprising a fixed section, an adjustable section hinged to the fixed section, and several adjusting devices evenly distributed around the outer circumference of the fixed section and the adjustable section. The two ends of the adjusting devices are respectively connected to the fixed section and the adjustable section. A sealing device is provided at the joint between the fixed section and the adjustable section. The adjusting device is a hydraulic cylinder. It should be noted that this is only a preferred embodiment and not a limiting provision. Of course, in other embodiments, the adjusting device can also be an electric cylinder.

[0032] An adjustable extension sleeve device is installed on the pre-embedded portal ring plate of the starting end wall 1. This device consists of a fixed section, an adjustable section, an adjustment device, and a sealing device. In use, the adjustable angle is changed by adjusting the device, thereby changing the angle between the starting axis 6 and the tunnel axis 5. This allows the cutterhead of the shield machine body 3 to pass through the portal ring plate synchronously and adapt to the tunnel design curve when it starts to run. The fixed section and the adjustable section are used to prevent groundwater or mud from seeping into the working shaft from the portal gap, thereby meeting the sealing requirements of the starting portal at different angles. It has strong adaptability and ensures the smooth start of the shield machine. After the adjustable position is adjusted, the shield machine body 3, which is erected on the starting bracket 4, is sent into the starting end wall 1 for operation through the extension sleeve device. The standard section 21 of the fixed section is used to connect with the pre-embedded portal ring plate through a bolt assembly, making this device easy to disassemble and recycle, and reusable, effectively reducing construction costs.

[0033] like Figures 3 to 8As shown, in a preferred embodiment, the fixed section includes a fixed section standard segment 21, and the fixed section standard segment 21 is connected to a fixed section hinge segment 22.

[0034] The adjustable section includes an adjustable standard section 23, which is connected to an adjustable hinge section 24. The adjustable hinge section 24 and the fixed section hinge section 22 are hinged together by a hinge shaft, so that the adjustable section can deflect relative to the fixed section within a predetermined angle range.

[0035] As a key design feature, the diameter of the adjustable hinge section 24 is smaller than that of the fixed hinge section 22. This dimensional difference is designed to provide the necessary space for the adjustable section to deflect relative to the fixed section, effectively preventing mechanical interference between the two components during movement.

[0036] The hydraulic cylinder includes a connecting rod 78 bolted to the standard section 21 of the fixed section. The connecting rod 78 is bolted to the hydraulic cylinder. The hydraulic cylinder includes a hydraulic hose body 77, within which a cylindrical chamber is formed. A hydraulic cylinder piston sealing device 73 is slidably connected. One end of the hydraulic cylinder piston rod 75 is mounted on the hydraulic cylinder piston sealing device 73, and the other end of the hydraulic cylinder piston rod 75 passes through and slidably connects to the hydraulic hose body 77. The hydraulic cylinder piston rod 75 is connected to the adjustable standard section 21. 3. Connection: The hydraulic oil pipe body 77 is equipped with hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76. Hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76 are connected by threads to plugs of matching sizes. The plugs are equipped with sealing rings and are used to seal hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76. The maximum stroke of the oil cylinder is 1200mm to meet the requirements of adjusting the angle of the extension sleeve when the tunnel boring machine starts on a curved section with a minimum turning radius of R250 meters.

[0037] The movable hydraulic cylinder piston sealing device 73 divides the chamber into a rodless chamber 72 and a rod chamber 74. Hydraulic oil pipe interface 1 71 is connected to the rodless chamber 72, and hydraulic oil pipe interface 2 76 is connected to the rod chamber 74. The hydraulic cylinder piston sealing device 73 is used to ensure the seal between the two oil chambers and prevent hydraulic oil from flowing between them.

[0038] In this embodiment, twelve adjustment devices are evenly arranged in the fixed section and the adjustable section in the circumferential direction, which are divided into four groups and respectively arranged in the four directions of up, down, left and right of the fixed section and the adjustable section. Each group has three adjustment devices, with one group in each of the four directions of up, down, left and right of the fixed section and the adjustable section. The maximum output of the adjustment devices is 5T. Of course, in other embodiments, the number of adjustment devices in each group can be two, four, etc.

[0039] When it is necessary to change the angle between the starting axis 6 and the tunnel axis 5, first unscrew the plugs on hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76. Then, connect the oil pipes with sealing rings to hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76 respectively via threads. Next, pump hydraulic oil into the rod chamber 74 or rodless chamber 72 through the hydraulic pump station. The hydraulic oil in the other chamber is then discharged back to the hydraulic pump station through the connected oil pipe. The flow of hydraulic oil regulates the piston mechanism of the cylinder. The position of the sealing device 73 allows the cylinder piston rod 75 to extend or retract from the hydraulic oil pipe body 77. Since the connecting rod 78 is fixed to the standard section 21 of the fixed section, the movement of the cylinder piston rod 75 drives the adjustable standard section 23 to move. After the stroke of the cylinder piston rod 75 is adjusted, the oil pipe is unscrewed from the hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76 of the cylinder, and the plug with the sealing ring is reinstalled on the hydraulic oil pipe interface 1 71 and hydraulic oil pipe interface 2 76. Subsequently, the strokes of the other eleven cylinders are adjusted sequentially. The piston rod 75 of the cylinders in the same group has the same stroke. The adjustable position is adjusted by moving the piston rod 75 to change the angle between the starting axis 6 and the tunnel axis 5.

[0040] The maximum stroke of the hydraulic cylinder determines the maximum adjustment angle of the adjustable extension sleeve device. This technical solution designs the maximum stroke of the hydraulic cylinder to be 1200mm. Taking a shield tunnel construction condition with a segment outer diameter of 6.2m as an example, if... Figure 8 As shown, the minimum turning radius of the shield machine body 3 is designed to be R250m. At this time, the strokes of the upper and lower sets of hydraulic cylinders of the extension sleeve are 174mm and 93mm respectively, and the strokes of the left and right sets of hydraulic cylinders are 133mm. The adjustment range of the hydraulic cylinder stroke of the extension steel sleeve meets the minimum turning requirement. Therefore, this technical solution is applicable to the shield machine launching conditions of tunnels with a horizontal curve of R250m and above.

[0041] By using 12 circumferentially distributed hydraulic cylinders, the adjustable angle can be actively and precisely controlled, thereby changing the angle between the starting axis 6 of the shield machine body 3 and the tunnel axis 5. This allows the cutterhead of the shield machine body 3 to pass through the starting portal synchronously and smoothly during the initial launch, making it suitable for starting portals with different angles. By controlling the stroke of the hydraulic cylinders with high precision, it can adapt to starting conditions on sharp curves with a radius as small as R250 meters, significantly improving the adaptability of this device to complex construction lines.

[0042] like Figures 3 to 6As shown, in a preferred embodiment, the sealing device includes ten grease holes 26 disposed on the hinge section 22 of the fixed section. The grease holes 26 are evenly distributed along the circumference of the hinge section 22 of the fixed section. In other embodiments, the number of grease holes 26 can be eight, twelve, fourteen, etc. It should be noted that the number of grease holes 26 is only a preferred option and not a limiting requirement. This flexibility allows the design to be optimized and adjusted according to different working conditions and sealing requirements.

[0043] Two sealing grooves are provided axially spaced on the outer circumference of the adjustable hinge section 24. Two detachable rubber sealing rings 25 are respectively embedded in these two sealing grooves. The rubber sealing rings 25 form a tight radial contact seal with the inner wall of the fixed section hinge section 22. The rubber sealing rings 25 are designed to be detachable, which makes it easy to quickly disassemble them for inspection, replacement or maintenance after wear or damage, reducing the maintenance cost of long-term repeated use of this device.

[0044] The grease hole 26 is located between the two rubber sealing rings 25. The ball valve 27 is located on the side of the grease hole 26 away from the rubber sealing rings 25. The ball valve 27 is used to control the opening and closing of the grease passage. In other embodiments, the ball valve 27 can be replaced by a butterfly valve, a plug valve, etc.

[0045] In this embodiment, during use, the detachable rubber sealing ring 25 is first placed in the two sealing grooves of the adjustable hinge section 24. Then, the adjustable hinge section 24 is hinged to the fixed section hinge section 22. Next, the ball valve 27 is opened, and sealing grease is injected into the grease hole 26 through an external grease pump to ensure the sealing and lubrication of the fixed section and the adjustable hinge part, ensuring the sealing reliability of the hinge part during adjustment. After the sealing grease is injected into the grease hole 26, the ball valve 27 is closed. The rubber sealing rings 25 located on both sides of the grease hole 26 form a sealing barrier, ensuring that an effective seal can be formed between the fixed section and the adjustable section after the adjustable section is adjusted, preventing external water or mud from flowing into the device, greatly reducing the risk of the shield machine body 3 during the initial stage, and ensuring the smooth start of the shield machine.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine, characterized in that... ,include: The fixed section is hinged to an adjustable section, which is able to deflect relative to the fixed section within a predetermined angle range. A sealing device is provided at the fixed section and the adjustable hinge; An adjustment device, wherein a plurality of adjustment devices are circumferentially evenly arranged on the fixed section and the adjustable section, the adjustment device including a hydraulic cylinder connecting the fixed section and the adjustable section, the hydraulic cylinder being used to drive the adjustable section to deflect at an angle relative to the fixed section, and when the adjustable section deflects, the sealing device being used to maintain a seal at the hinge. The plurality of adjustment devices are divided into four groups, which are respectively arranged on the fixed section and the adjustable upper, lower, left and right positions, and each group has at least two adjustment devices; The fixed section includes a standard section, which is rigidly connected to the pre-embedded hole door ring plate by fasteners to facilitate disassembly and recycling of the device; the standard section is connected to a hinged section, which is used to form a movable hinge with the adjustable section so that the adjustable section can deflect relative to the fixed section within a predetermined angle range. The adjustable section includes an adjustable standard section, which is connected to an adjustable hinge section. The adjustable hinge section is hinged to the fixed section hinge section, and the hydraulic cylinder is connected to the adjustable standard section. The diameter of the adjustable hinge section is smaller than the diameter of the fixed hinge section, providing necessary space for the adjustable section to deflect relative to the fixed section, effectively preventing mechanical interference between the two components during movement; The hydraulic cylinder includes a connecting rod disposed on the fixed standard section, a hydraulic oil pipe body disposed on the connecting rod, a chamber formed within the hydraulic oil pipe body, a hydraulic cylinder piston sealing device slidably connected within the chamber, a hydraulic cylinder piston rod disposed on the hydraulic cylinder piston sealing device and slidably connected to the hydraulic oil pipe body, the hydraulic cylinder piston rod being connected to the adjustable standard section, and a hydraulic oil pipe interface one and a hydraulic oil pipe interface two disposed on the hydraulic oil pipe body, the hydraulic oil pipe interface one and the hydraulic oil pipe interface two being used to input or output hydraulic oil into or out of the chamber.

2. The reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine as described in claim 1, characterized in that: The movable cylinder piston sealing device divides the chamber into a rodless chamber and a rod chamber. The first hydraulic oil pipe interface is connected to the rodless chamber, and the second hydraulic oil pipe interface is connected to the rod chamber. The hydraulic oil in the rodless chamber is input or output through the first hydraulic oil pipe interface, and the hydraulic oil in the rod chamber is input or output through the second hydraulic oil pipe interface.

3. The reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine as described in claim 1, characterized in that: The sealing device includes a plurality of grease holes disposed in the hinge section of the fixed section, two detachable rubber sealing rings disposed in the sealing groove of the adjustable hinge section, and a ball valve disposed on the side of the grease holes away from the rubber sealing rings.

4. A reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine as described in claim 3, characterized in that: The grease hole is located between the two rubber sealing rings.

5. A reusable extension sleeve for adjusting the tunneling angle of a tunnel boring machine as described in claim 3, characterized in that: The number of grease holes is ten, and they are evenly distributed along the circumference of the hinged section of the fixed joint.

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