Variable-distance energy supply device of heading machine, pipeline connection method and heading method

Abstract

The invention relates to the technical field of tunneling construction equipment, in particular to a variable-distance energy supply device of a tunneling machine, a pipeline connection method and a tunneling method, and solves the problem of extension of a variable-distance pipeline between a tunneling main machine and a supply station in the prior art. The tunneling main machine is connected with the supply station through at least one pipeline unit, and every two adjacent pipeline units are connected through a pipeline connector. The supply station is provided with a first supply station interface and a second supply station interface; a telescopic pipeline supporting assembly is arranged on the inner wall of the tunneling tunnel, the pipeline supporting assembly is connected with the tunneling main machine, and the pipeline unit is installed on the pipeline supporting assembly. The heading machine has the advantages that the heading main machine is connected with the rear matching device through the variable-distance pipeline, the problems of power supply of the variable-distance remote main machine and transmission of various media in the prior art are solved, the effect that the connecting pipeline of the heading machine rapidly extends and fluid is not interrupted in the lengthening process is achieved, and operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tunneling equipment technology, and in particular to a variable distance power supply device for a tunneling machine, a pipeline connection method, and a tunneling method. Background Technology

[0002] Full-face tunneling machines (TBMs) offer advantages such as high tunneling efficiency, safety, economy, and environmental friendliness. Currently, in coal mines, metal mines, and pumped-storage tunneling projects, short-distance tunnel excavation is increasingly common. With the changing demands of tunneling applications for TBMs, the TBM main unit and its supporting systems are adopting a modular design. The TBM main unit and supporting systems are connected via long-distance pipelines and cables. The equipment's own electrical, hydraulic, and fluid pipelines provide power, control signals, and various media transmissions for its operation. Currently, during TBM tunneling, the equipment pipelines are mounted on the supporting system and move synchronously with the tunneling machine. The extension methods of the equipment's own electrical, hydraulic, and fluid pipelines have many limitations. Existing synchronous tunneling with the TBM main unit and supporting systems is more suitable for rapid excavation of long-distance rock tunnels. However, with the increasing demand for short-distance rock tunnel excavation, this has become a serious problem restricting development and production capacity. The extension methods and rapid deployment of the tunneling machine's electrical, hydraulic, and fluid pipelines are key factors limiting the equipment's flexibility.

[0003] Currently, with the changing demands of tunnel boring machine (TBM) applications, mobile TBMs have emerged. However, this has also brought about the problem of extending their pipeline connections. For example, patent publication number CN221080895U discloses a self-moving device for suspending and moving the cable of a TBM's secondary transport system. This device includes a secondary transport frame for the TBM, a first support, a second support, an upper pulley, a lower pulley, a wire rope, and multiple lifting ring assemblies. The upper and lower pulleys are fixed to the top and bottom of the second support, respectively. The wire rope is mounted on the first and second supports, and the TBM's following cable is suspended from this section of wire rope through the lifting ring assemblies. The lower end of the first support is fixed to the tail frame of a belt conveyor, and the lower end of the second support is fixed to the secondary transport frame of the TBM. One end of the wire rope is fixed to the top of the first support, and the other end passes around the upper pulley and the lower pulley, and is fixed and tensioned on the tail frame of the belt conveyor. The upper edge of the upper pulley is higher than the fixing point of the wire rope on the first support. The aforementioned cable hanging self-moving device facilitates cable extension and retraction, but it is only suitable for short-distance rock tunnel excavation equipment. It still faces significant applicability challenges in terms of rapid extension and uninterrupted connection of long-distance pipelines, especially in the case of limited underground construction space and difficulty in extension control during deep tunnel excavation. Summary of the Invention

[0004] This invention proposes a variable-distance power supply device for tunneling machines, a pipeline connection method, and a tunneling method, which solves the problems of rapid extension and uninterrupted connection of variable-distance pipelines between the tunneling machine and the supply station in the prior art.

[0005] The technical solution of this invention is implemented as follows: A variable-distance power supply connection device for a tunnel boring machine includes a tunneling main unit located inside the tunnel and a supply station located inside the launching shaft. The tunneling main unit is connected to the supply station through at least one pipeline unit, and two adjacent pipeline units are connected through pipeline connection joints. The supply station is provided with a first supply station interface and a second supply station interface. A retractable pipeline support assembly is provided on the inner wall of the tunnel, and the pipeline support assembly is connected to the tunneling main unit. The pipeline units are installed on the pipeline support assembly. During the forward tunneling process of the tunneling main unit, the Nth pipeline unit unfolds from a folded state to a straight state. After the Nth pipeline unit is fully unfolded, the N+1th pipeline unit is connected between the Nth pipeline unit and the supply station. During tunnel excavation, the supporting supply station is located inside the launching shaft. This means that the supporting equipment does not enter the tunnel; only the tunnel boring machine (TBM) enters the tunnel. The TBM occupies little space, facilitating its forward, turning, and reversing movements, effectively improving the equipment's flexibility during excavation. In addition, by adding different numbers of pipeline units, long-distance pipeline extensions can be achieved between the TBM and the supporting supply station, improving pipeline applicability and thus enhancing the TBM's mobility. In other words, the TBM can excavate long distances while the supporting supply station remains stationary.

[0006] The pipeline support assembly includes a cable retractor and a cable fixing frame. The cable retractor is mounted on the tunneling machine, and the cable fixing frame is installed on the inner wall of the tunnel. The cable retractor has a cable attached to it, with the end of the cable connected to the cable fixing frame. The cable fixing frame is located at the entrance of the tunnel. As the tunneling machine advances, the cable retractor extends the cable synchronously, keeping the cable taut at all times, thus forming the pipeline travel cable.

[0007] Cable supports are spaced apart on the inner wall of the tunnel, and the cables are attached to the supports. As the tunneling machine advances inside the tunnel, when the cable extends to a certain distance, cable supports are installed on the inner wall of the tunnel to support the cable and improve its load-bearing capacity.

[0008] The pipeline unit includes a pipeline with multiple pipeline traveling devices spaced along its length. These devices are connected to cables, and the ends of the pipeline are detachably connected to pipeline connectors. Each end of the pipeline is equipped with an electrically controlled gate valve. The pipeline includes the equipment's own hydraulic pipeline, providing power and facilitating the transmission of various media for the equipment's operation. Modularizing these pipelines facilitates rapid extension of the pipeline between the tunneling machine and the supply station, improving pipeline extension efficiency, increasing the tunneling machine's travel distance relative to the supply station, and enhancing the equipment's flexibility and applicability.

[0009] The adjacent pipeline traveling devices are connected by a pull line, the length of which is less than the natural extension length of the pipeline between the two adjacent devices. The pull line provides tension between the adjacent pipeline traveling devices, pulling the next pipeline traveling device forward; at the same time, it avoids tension on the pipeline between the two adjacent devices, ensuring safety during pipeline extension.

[0010] The pipeline traveling device includes a sliding cable gripper and a pipeline clamp. The sliding cable gripper is slidably connected to the pipeline support assembly, and the pipeline clamp securely holds the pipeline in place. The pipeline clamp is connected to the sliding cable gripper via a traveling beam, and the end of the pull line is connected to the traveling beam. The pipeline clamp is suspended on the cable via the sliding cable gripper, and the pipeline is secured by the clamp. When the sliding cable gripper moves on the cable, it can extend and fold the pipeline, thus making the pipeline suitable for the forward or backward movement of the tunneling machine.

[0011] A braking device is installed on the inner wall of the tunnel, located at the tunnel entrance. The braking device is detachably connected to the pipeline travel device at the tail end of the pipeline unit. When the tunneling machine moves forward, the braking device restricts the movement of the pipeline travel device at the tail end of the pipeline unit, allowing the pipeline in the pipeline unit to fully extend. After the pipeline is fully extended, the pipeline travel device disconnects from the braking device, allowing the pipeline unit to continue moving forward. At this time, the hook at the end of the connecting line connects to the pipeline travel device at the head end of the next pipeline unit, thereby enabling the previous pipeline unit to drive the next pipeline unit to move.

[0012] The pipeline connection joint includes at least three pipeline interfaces, each equipped with an interface valve and an interface flange. The pipeline connection joint connects to the pipeline via the interface flange, while the interface valves control the opening and closing of each pipeline interface, facilitating uninterrupted power supply to the pipeline.

[0013] Each of the first and second supply station interfaces is equipped with a switch valve. The switch valves are used to control the on / off state of the first and second supply station interfaces.

[0014] A traction and retrieval device is installed at the entrance of the tunnel, and the traction and retrieval device is detachably connected to the pipeline unit. Specifically, the traction and retrieval device is a winch, which is connected to the traction line in the pipeline unit, and the pipeline unit is retrieved by pulling the winch.

[0015] A pipeline connection method for the variable distance power supply device of the tunneling machine, comprising: Before pipeline unit connection: one end of the Nth pipeline unit is connected to the first pipeline interface on the pipeline connection joint, the first supply station interface is connected to the third pipeline interface on the pipeline connection joint, and the second pipeline interface on the pipeline connection joint is closed. When connecting pipeline units: connect one end of the N+1th pipeline unit to the second pipeline interface on the pipeline connection joint, and connect the other end of the N+1th pipeline unit to the second supply station interface through another pipeline connection joint. The supply station fills the N+1th pipeline unit with liquid medium through the first supply station interface and discharges the air in the N+1th pipeline unit. After the pipeline unit is connected: disconnect the first supply station interface from the pipeline connection joint, open the second pipeline interface and the second supply station interface to connect the two pipeline units, and the pipeline unit connection is completed.

[0016] By alternating fluid supply through the first and second supply station interfaces and adding pipeline units, the continuous flow of the pipeline can be effectively achieved, thereby improving the working efficiency of the tunneling machine.

[0017] A tunneling method, comprising: The tunneling machine enters the tunnel to excavate. The supply station is located in the starting shaft and supplies power to the tunneling machine through pipeline units. During the tunneling machine's forward excavation, the cable extender on the tunneling machine extends the cable, and the pipeline traveling device in the pipeline unit moves on the cable, causing the pipeline in the pipeline unit to straighten or move forward. After the Nth pipeline unit on the cable is fully deployed, the N+1th pipeline unit is connected between the Nth pipeline unit and the supply station using the connection method of the tunneling machine's variable distance power supply device.

[0018] When the cable extends a certain distance, cable supports are installed on the inner wall of the tunnel to support the cable. This prevents excessive sag of the cable and ensures the cable's support for the pipeline unit.

[0019] After the tunnel boring machine completes its excavation, it retracts and the cable retractor retrieves the cable. At the same time, the traction and retrieval device located at the tunnel entrance pulls the pipeline unit to fold and retract. The pipeline unit is then retrieved and disassembled at the tunnel entrance.

[0020] The beneficial effects of this invention are: the use of pipeline units for variable-distance pipeline connection between the tunneling machine and its supporting equipment solves the problem of providing power and transmitting various media by the remote host in the prior art, realizes the effect of rapid extension of the tunneling machine's connecting pipeline and uninterrupted fluid flow during the extension process, achieves second-level adjustment of pipeline length, improves work efficiency, and reduces construction costs.

[0021] In addition, during tunnel excavation, the supporting supply station is located inside the launching shaft. That is, the supporting equipment does not enter the tunnel, only the tunneling machine enters the tunnel. The tunneling machine occupies little space, which facilitates the forward, turning and backward movement of the tunneling machine, effectively improving the flexibility of the equipment during tunneling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the variable-distance power supply device for a tunneling machine; Figure 2 A schematic diagram of the cross-section of a variable-distance power supply device for a tunneling machine; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of a pipeline connection joint structure; Figure 5 A schematic diagram showing the connection between the supply station and the pipeline unit before pipeline unit splicing; Figure 6 This is a schematic diagram showing the connection between the supply station and the pipeline unit during pipeline unit splicing; Figure 7 This is a schematic diagram showing the connection between the supply station and the pipeline unit after the pipeline unit is connected. In the diagram: 1. Cable retractor, 2. Pipeline transition plate, 3. Pipeline traveling device, 31. Sliding cable gripper, 32. Traveling beam, 33. Pipeline clamp, 4. Cable, 5. Cable bracket, 6. Pull line, 7. Cable fixing frame, 8. Pipeline, 81. Nth pipeline unit, 82. N+1th pipeline unit, 83. Electrically controlled gate valve, 9. Pipeline connection joint, 91. Interface valve, 92. Interface flange, 10. Braking device, 11. Supply station, 111. First supply station interface, 112. Second supply station interface, 911. First pipeline interface, 912. Second pipeline interface, 913. Third pipeline interface. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: A variable-distance power supply device for a tunneling machine, such as... Figure 1As shown, the system includes a tunneling machine located inside the tunnel and a supply station 11 located inside the launching shaft. The tunneling machine is connected to the supply station 11 through at least one pipeline unit, and two adjacent pipeline units are connected through a pipeline connection joint 9. The supply station 11 is provided with a first supply station interface 111 and a second supply station interface 112. A retractable pipeline support assembly is provided on the inner wall of the tunnel, and the pipeline support assembly is connected to the tunneling machine. The pipeline units are installed on the pipeline support assembly. During the forward tunneling process of the tunneling machine, the Nth pipeline unit unfolds from a folded state to a straight state. After the Nth pipeline unit is fully unfolded, the N+1th pipeline unit is connected between the Nth pipeline unit and the supply station 11. The tunneling machine and the supply station 11 in the supporting equipment are set up separately. When the tunnel is being excavated, the supply station 11 in the supporting equipment is located in the starting shaft and remains stationary. That is, the supporting equipment does not enter the tunnel, only the tunneling machine enters the tunnel. The tunneling machine occupies little space, which facilitates the forward, turning and reversing of the tunneling machine and effectively improves the flexibility of the equipment during tunneling. In addition, by adding different numbers of pipeline units, the tunneling machine can extend the pipelines relative to the supporting supply station at different distances, improve the applicability of the pipelines, and thus improve the mobility of the tunneling machine. That is, the tunneling machine can carry out long-distance tunneling while the supporting supply station remains stationary.

[0026] Furthermore, the pipeline support assembly includes a cable retractor 1 and a cable fixing frame 7. The cable retractor 1 is mounted on the tunneling machine, and the cable fixing frame 7 is installed on the inner wall of the tunnel. The cable retractor 1 has a cable 4, and the end of the cable 4 is connected to the cable fixing frame 7. Specifically, the cable retractor 1 is a winch, and the cable 4 is wound on the winch. The winch rotates forward or backward to retract the cable 4. Cable supports 5 are spaced apart on the inner wall of the tunnel, and the cable 4 is attached to the cable supports 5. The cable fixing frame 7 is located on the inner wall of the tunnel. When the tunneling machine advances forward, the cable retractor 1 extends the cable 4 synchronously, keeping the cable 4 taut at all times, forming a support cable 4 for the sliding gripper 31 to attach to. As the tunneling machine advances in the tunnel, when the cable 4 extends to a certain distance, a cable support 5 is set on the inner wall of the tunnel to support the cable 4, reduce the deformation of the cable 4, and improve the load-bearing capacity of the cable 4.

[0027] Example 2, based on Example 1, provides a variable-distance power supply device for a tunneling machine. The pipeline unit includes a pipeline 8, with multiple pipeline traveling devices 3 spaced along its length. The pipeline traveling devices 3 are connected to cables 4. The ends of the pipeline 8 are detachably connected to pipeline connection joints 9. Electrically controlled gate valves 83 are provided at both ends of the pipeline 8. In this example, the pipeline 8 includes various fluid pipelines within the equipment itself. Each fluid pipeline provides power and facilitates the transmission of various media for the equipment's operation. Modularizing these pipelines allows for rapid extension of the pipeline 8 between the tunneling machine and the supply station, improving the extension efficiency of the pipeline 8, increasing the forward distance of the tunneling machine relative to the supply station, and enhancing the flexibility and applicability of the equipment.

[0028] When connecting pipeline units, after installing pipeline 8 in the (N+1)th pipeline unit, the tunneling machine can be stopped first. At this time, the electrically controlled gate valve 83 at the connection position between the Nth pipeline unit and the pipeline connection joint 9 can be closed, and the electrically controlled gate valve 83 at the connection position between the N+1th pipeline unit and the pipeline connection joint 9 can be opened. The supply station 11 can fill the pipeline 8 in the (N+1)th pipeline unit with liquid and expel the air through the first supply station interface 111. After the pipeline 8 in the (N+1)th pipeline unit is filled with liquid, the electrically controlled gate valve connecting the N+1th pipeline unit and the second supply station interface 112 can be opened. At this time, the supply station 11 can supply liquid to the N+1th pipeline unit and the Nth pipeline unit in sequence through the second supply station interface 112. The tunneling machine can then be restarted for tunnel excavation.

[0029] Furthermore, adjacent pipeline traveling devices 3 are connected by a pull line 6, the length of which is less than the natural extension length of the pipeline 8 between adjacent pipeline traveling devices 3. Additionally, the tunneling machine is also connected to the pipeline traveling device 3 at the front end of the pipeline unit, and to adjacent pipeline units, via pull lines 6. During the tunneling machine's forward excavation, the machine pulls the pipeline traveling device 3 via the pull lines 6, thereby unfolding the pipeline unit and extending the pipeline. Furthermore, as the pipeline unit moves, the pull lines 6 provide tension, with the preceding pipeline traveling device 3 pulling the next one forward; this avoids tension on the pipeline 8 between adjacent pipeline traveling devices 3, ensuring the safety of the pipeline 8 during extension.

[0030] Furthermore, such as Figure 2 , Figure 3As shown, the pipeline traveling device 3 includes a sliding gripper 31 and a pipeline clamp 33. The sliding gripper 31 is slidably connected to the pipeline support assembly, and the pipeline clamp 33 clamps and fixes the pipeline 8. The pipeline clamp 33 is connected to the sliding gripper 31 through the traveling beam 32, and the end of the pull line 6 is connected to the traveling beam 32. The pipeline clamp 33 is suspended on the pipeline support assembly through the sliding gripper 31, and the pipeline clamp 33 secures and fixes the pipeline 8. When the sliding gripper 31 moves on the pipeline support assembly, it can extend and fold the pipeline 8, thus making the pipeline 8 suitable for the forward or backward movement of the tunneling machine.

[0031] Furthermore, a braking device 10 is installed on the inner wall of the tunnel, located at the tunnel entrance. The braking device 10 is detachably connected to the pipeline travel device 3 at the tail end of the pipeline unit. In this embodiment, the braking device 10 is a hanging ring, which is suspended on the inner wall of the tunnel. The pipeline travel device 3 at the tail end of the pipeline unit is provided with a connecting line, and a hook is provided at the end of the connecting line. The hook is connected to the hanging ring. When the pipeline unit extends and unfolds, the hook is connected to the hanging ring, and the braking device 10 restricts the movement of the pipeline travel device 3 at the tail end of the pipeline unit through the connecting line, so that the pipeline 8 in the pipeline unit can be fully extended. After the pipeline 8 is fully extended, the pipeline travel device 3 is disconnected from the braking device 10, so that the pipeline unit can continue to move forward. At this time, the hook at the end of the connecting line is connected to the pipeline travel device 3 at the head end of the next pipeline unit, so that the previous pipeline unit can drive the next pipeline unit to move.

[0032] Furthermore, such as Figure 4 As shown, the pipeline connection joint 9 includes at least three pipeline interfaces, each of which is equipped with an interface valve 91 and an interface flange 92. In this embodiment, the pipeline connection joint 9 is provided with a first pipeline interface 911, a second pipeline interface 912, and a third pipeline interface 913. The first pipeline interface 911, the second pipeline interface 912, and the third pipeline interface 913 are interconnected. The pipeline 8 is connected to the pipeline connection joint 9 through the interface flange 92. At the same time, the interface valve 91 is used to control the opening or closing of each pipeline interface.

[0033] Furthermore, the tunneling machine is equipped with a pipeline transition plate 2. The fluid pipe joints of the fluid-using equipment on the tunneling machine are integrated on the pipeline transition plate 2. The pipeline 8 in the pipeline unit is connected to the fluid pipe joint on the pipeline transition plate 2 through the pipeline connection joint 9, so as to realize the connection between the pipeline 8 and the fluid-using equipment on the tunneling machine. In addition, the pipeline 8 is connected to the first supply station interface 111 or the second supply station interface 112 through the pipeline connection joint 9, so as to realize the connection between the pipeline 8 and the supply station 11, thereby realizing the connection between the supply station 11 and the fluid-using equipment on the tunneling machine, ensuring that the fluid-using equipment on the tunneling machine can operate normally.

[0034] Furthermore, the first supply station interface 111 and the second supply station interface 112 are respectively equipped with switching valves. The switching valves are used to control the on / off state of the first supply station interface 111 and the second supply station interface 112.

[0035] Furthermore, a traction and recovery device is installed at the entrance of the tunnel, and the traction and recovery device is detachably connected to the pipeline unit. Specifically, the traction and recovery device is a winch, which is connected to the traction line 6 in the pipeline unit, and the pipeline unit is recovered by pulling the traction line.

[0036] Example 3, based on Example 2, provides a pipeline connection method for the variable distance power supply device of the tunneling machine, comprising: Before connecting pipeline units: such as Figure 5 As shown, one end of the Nth pipeline unit 81 is connected to the first pipeline interface 911 on the pipeline connection joint 9, the first supply station interface 111 is connected to the third pipeline interface 913 on the pipeline connection joint 9, and the second pipeline interface 912 on the pipeline connection joint 9 is closed. At this time, the supply station 11 supplies fluid to the tunneling host in sequence through the first supply station interface 11 and the Nth pipeline unit 81, providing the tunneling host with the power to advance forward, enabling the tunneling host to advance forward in tunnel excavation. Furthermore, when the tunneling host moves forward, it simultaneously stretches the pipeline support assembly, thereby extending the pipeline support assembly and driving the pipeline unit to extend and unfold on the pipeline support assembly.

[0037] When connecting pipeline units: such as Figure 6 As shown, one end of the (N+1)th pipeline unit 82 is connected to the second pipeline interface 912 on the pipeline connection joint 9, and the other end of the (N+1)th pipeline unit 81 is connected to the second supply station interface 112 through another pipeline connection joint 9. The supply station 11 fills the (N+1)th pipeline unit 81 with liquid medium through the first supply station interface 111 and discharges the air in the (N+1)th pipeline unit 81. The supply station 11 supplies medium to the (N+1)th pipeline unit 82 through the first supply station interface 111, so that the liquid medium fills the (N+1)th pipeline unit 82 and discharges the air in the pipe.

[0038] After the pipeline unit is connected: such as Figure 7 As shown, the first supply station interface 111 is disconnected from the pipeline connection joint 9, and the second pipeline interface 912 and the second supply station interface 112 are opened to connect the two pipeline units, thus completing the pipeline unit connection. At this time, the second supply station interface 112 supplies media to the tunneling host through the (N+1)th pipeline unit 82 and the Nth pipeline unit 81 in sequence, realizing the pipeline connection.

[0039] Example 4, based on Example 3, a tunneling method, comprising: The tunneling machine enters the tunnel to excavate. The supply station 11 is located in the starting shaft and supplies power to the tunneling machine through the pipeline unit. During the tunneling machine's forward excavation, the cable retractor 1 on the tunneling machine extends the cable 4, and the pipeline traveling device 3 in the pipeline unit moves on the cable 4, causing the pipeline 8 in the pipeline unit to straighten or move forward. After the Nth pipeline unit on the cable 4 is fully deployed, the N+1th pipeline unit is connected between the Nth pipeline unit and the supply station 11 using the connection method of the tunneling machine's variable distance power supply device. The cable 4 is connected to the cable fixing frame 7 on the inner wall of the tunnel. The cable 4 is kept straight by the cable retractor 1 and the cable fixing frame 7. At this time, the cable 4 provides support for the pipeline 8 in the pipeline unit. As the tunneling machine moves in the tunnel, when the cable 4 extends a certain distance, the cable support 5 is set on the inner wall of the tunnel. The cable support 5 supports the cable 4 and ensures that the cable 4 has sufficient support for the pipeline 8.

[0040] Furthermore, when the tunneling machine moves, the pull line 6 provides tension, that is, the tunneling machine pulls the pipeline traveling device 3 in the pipeline unit to move on the cable 4 through the pull line 6, and the previous pipeline traveling device 3 pulls the next pipeline traveling device 3 to move, so as to realize the unfolding and straightening or forward movement of the pipeline 8.

[0041] Furthermore, after the tunneling machine completes its excavation, it retracts, and the cable retractor 1 retrieves the cable 4. At the same time, the traction and retrieval device set at the tunnel entrance pulls the traction line 6 back, causing the pipeline unit to fold and retract. Then, the pipeline unit is retrieved and disassembled at the tunnel entrance.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 variable-distance power supply device for a tunnel boring machine, comprising a tunnel boring machine located inside the tunnel and a supply station (11) located inside the launching shaft, characterized in that, The tunneling machine is connected to the supply station (11) through at least one pipeline unit, and two adjacent pipeline units are connected through a pipeline connection joint (9); the supply station (11) is provided with a first supply station interface (111) and a second supply station interface (112); the inner wall of the tunnel is provided with a retractable pipeline support assembly, which is connected to the tunneling machine, and the pipeline unit is installed on the pipeline support assembly; During the forward tunneling process of the tunneling host, the Nth pipeline unit unfolds from the folded state to the straight state; after the Nth pipeline unit is fully unfolded, the N+1th pipeline unit is connected between the Nth pipeline unit and the supply station (11).

2. The variable distance power supply device for a tunneling machine according to claim 1, characterized in that, The pipeline support assembly includes a cable retractor (1) and a cable fixing frame (7). The cable retractor (1) is installed on the tunneling host, and the cable fixing frame (7) is installed on the inner wall of the tunnel. The cable retractor (1) is provided with a cable (4), and the end of the cable (4) is connected to the cable fixing frame (7).

3. The variable distance power supply device for a tunneling machine according to claim 2, characterized in that, Cable supports (5) are installed at intervals on the inner wall of the tunnel, and cables (4) are attached to the cable supports (5).

4. The variable-distance power supply device for a tunneling machine according to claim 1, 2, or 3, characterized in that, The pipeline unit includes a pipeline (8), and multiple pipeline traveling devices (3) are spaced along the length of the pipeline (8). The pipeline traveling devices (3) are connected to the cable (4). The end of the pipeline (8) is detachably connected to the pipeline connection joint (9). Both ends of the pipeline (8) are equipped with electrically controlled gate valves.

5. The variable-distance power supply device for a tunneling machine according to claim 4, characterized in that, The two adjacent pipeline traveling devices (3) are connected by a pull line (6), and the length of the pull line (6) is less than the natural extension length of the pipeline (8) between the two adjacent pipeline traveling devices (3).

6. The variable-distance power supply device for a tunneling machine according to claim 4, characterized in that, The pipeline traveling device (3) includes a sliding gripper (31) and a pipeline clamp (33). The sliding gripper (31) is slidably connected to the pipeline support assembly. The pipeline clamp (33) clamps and fixes the pipeline (8). The pipeline clamp (33) is connected to the sliding gripper (31) through the traveling beam (32). The end of the pull line (6) is connected to the traveling beam (32).

7. The variable-distance power supply device for a tunneling machine according to claim 6, characterized in that, A braking device (10) is installed on the inner wall of the tunnel. The braking device (10) is located at the entrance of the tunnel. The braking device (10) is detachably connected to the pipeline walking device (3) at the end of the pipeline unit.

8. The variable distance power supply device for a tunneling machine according to claim 5, 6, or 7, characterized in that, The pipeline connection joint (9) includes at least three pipeline interfaces, each of which is equipped with an interface valve (91) and an interface flange (92).

9. The variable-distance power supply device for a tunneling machine according to claim 8, characterized in that, Switch valves are respectively provided on the first supply station interface (111) and the second supply station interface (112).

10. The variable-distance power supply device for a tunneling machine according to claim 9, characterized in that, A traction and recovery device is installed at the entrance of the tunnel, and the traction and recovery device is detachably connected to the pipeline unit.

11. A pipeline connection method for the variable distance power supply device of a tunneling machine as described in any one of claims 1 to 10, characterized in that, include: Before the pipeline unit is connected: one end of the Nth pipeline unit is connected to the first pipeline interface (911) on the pipeline connection joint (9), the first supply station interface (111) is connected to the third pipeline interface (913) on the pipeline connection joint (9), and the second pipeline interface (912) on the pipeline connection joint (9) is closed. When connecting pipeline units: connect one end of the N+1th pipeline unit to the second pipeline interface (912) on the pipeline connection joint (9), connect the other end of the N+1th pipeline unit to the second supply station interface (112) through another pipeline connection joint (9), and the supply station (11) fills the N+1th pipeline unit with liquid medium through the first supply station interface (111) and discharges the air in the N+1th pipeline unit; After the pipeline unit is connected: disconnect the first supply station interface (111) from the pipeline connection joint (9), open the second pipeline interface (912) and the second supply station interface (112) to connect the two pipeline units, and the pipeline unit connection is completed.

12. A tunneling method, characterized in that, include: The tunneling machine enters the tunnel to excavate. The supply station (11) is set up in the starting shaft and supplies power to the tunneling machine through the pipeline unit. During the forward tunneling process, the cable retractor (1) on the tunneling machine extends the cable (4), and the pipeline walking device (3) in the pipeline unit moves on the cable (4), so that the pipeline (8) in the pipeline unit is straightened or moves forward; after the Nth pipeline unit on the cable (4) is fully deployed, the N+1th pipeline unit is connected between the Nth pipeline unit and the supply station (11) using the connection method of the variable distance power supply device of the tunneling machine as described in claim 11.

13. The tunneling method according to claim 12, characterized in that, When the cable (4) extends a certain distance, a cable support (5) is installed on the inner wall of the tunnel to support the cable (4).

14. The tunneling method according to claim 12, characterized in that, After the tunneling host finishes tunneling, the tunneling host moves backward and the cable retractor (1) retracts the cable (4). At the same time, the traction and recovery device set at the entrance of the tunnel pulls the pipeline unit to fold and retract. Then the pipeline unit is disassembled and recovered at the tunnel entrance.

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