Central rotation device for ring rail power transmission and ring rail power transmission method

Abstract

This application discloses a central rotary device and method for power transmission in a ring track, belonging to the technical field of tunnel construction equipment. The central rotary device for power transmission in a ring track includes: a floating arm, the end of which is connected to the ring track working equipment; a power transmission pipe for transmitting hydraulic power and / or electricity to the ring track working equipment; a central rotary swing cylinder connected to the floating arm, the central rotary swing cylinder having a control oil circuit, which allows the central rotary swing cylinder to be in a locked state or a balanced floating state. In the locked state, the floating arm is fixed in its current position; in the balanced floating state, the floating arm can rotate around the central rotary swing cylinder under the action of external force, achieving follow-up coordination; and a basic arm for supporting the floating arm and the central rotary swing cylinder, positioning the central rotary swing cylinder at the geometric center of the ring track. This application achieves blind-spot-free power transmission throughout the entire ring, ensuring the range of motion of construction machinery and working booms on the ring track.

Description

Technical Field

[0001] This application relates to the field of tunnel construction equipment technology, specifically to a central rotary device and a method for power transmission of ring tracks. Background Technology

[0002] In tunnel construction, especially in the lining of new tunnels and the repair and reinforcement of old tunnels, a circular track, hereinafter referred to as the ring track, is often used as a working platform support, erected around the tunnel cross-section. The ring track work equipment can travel along the circumference of the track and, in conjunction with spraying, trimming, scraping, and anchoring tools, achieve full coverage construction of the tunnel's inner wall.

[0003] Circular track work equipment typically requires a continuous hydraulic and / or electrical supply to drive the traveling mechanism, boom, and construction tools. Existing technologies commonly employ two main power transmission methods: cable chain conveying and hose reel conveying. Cable chain conveying involves placing hydraulic hoses and cables within a cable chain, which is dragged along with the equipment. Hose reel conveying utilizes a reel to wind up and unwind the hose; however, in circular track applications, additional guide rollers are required for this, resulting in a complex layout and a large hose bending radius.

[0004] The above two methods have the following shortcomings: the drag chain is prone to jamming at the top of the track, especially in the tunnel arch section. The movement trajectory of the drag chain is difficult to be completely consistent with the circular travel path of the equipment, resulting in failure to follow at certain angles and forming a power transmission blind spot; the winding and unwinding direction of the hose reel is usually arranged in a single plane. When the equipment passes through the top or near the ground section, the angle between the direction of the hose and the winding and unwinding direction of the reel is too large, which can easily cause pulling, accumulation or entanglement, and make it impossible to maintain continuous following. Summary of the Invention

[0005] This application provides a central rotary device and a method for ring track power transmission to solve the technical problem that existing ring track power transmission cannot achieve full-ring follow-up and has blind spots in operation.

[0006] According to one aspect of this application, a central rotary device for power transmission of a ring track is provided, including a floating arm that is capable of extending and retracting along the length direction, and the end of the floating arm is used to connect to ring track operation equipment.

[0007] Power delivery pipes, arranged along the floating arm, are used to deliver hydraulic power and / or electricity to the ring track work equipment;

[0008] The central rotary swing cylinder is connected to the floating arm. The central rotary swing cylinder has a control oil circuit. The control oil circuit can make the central rotary swing cylinder either locked or balanced floating. In the locked state, the floating arm is fixed in the current position. In the balanced floating state, the floating arm can rotate around the central rotary swing cylinder under the action of external force to achieve follow-up coordination.

[0009] The basic arm supports the floating arm and the central rotary swing cylinder, positioning the central rotary swing cylinder at the geometric center of the ring rail.

[0010] Optionally, a slewing base is provided at the end of the basic arm away from the floating arm, the basic arm and the slewing base are rotatably engaged, and a pitch cylinder for adjusting the pitch angle of the basic arm is provided between the basic arm and the slewing base.

[0011] Optionally, the basic arm is a telescopic structure, and the basic arm is equipped with a basic arm telescopic cylinder for controlling the telescopic movement.

[0012] Optionally, the floating arm is provided with a pin holder, the pin holder having a pin hole for inserting a pin, and a proximity switch for detecting the pin insertion status is installed on the pin holder.

[0013] Optionally, two proximity switches are provided along the axial direction of the pin hole.

[0014] Optionally, the control oil circuit of the central rotary swing cylinder includes: a first locking balance valve, a second locking balance valve, a floating back pressure valve, and a floating reversing valve, and is provided with a control oil port X connected to the ring track operation equipment;

[0015] The two chambers of the central rotary swing cylinder are connected to the first locking balance valve and the second locking balance valve respectively. The outlets of the first locking balance valve and the second locking balance valve are connected to the floating back pressure valve and the floating directional valve respectively.

[0016] The floating back pressure valve and the two chambers of the central rotary swing cylinder form a circuit that can overflow in both directions;

[0017] When there is no pressure at control port X, the floating directional valve is in the closed position, which locks the center rotary swing cylinder with the first and second locking balance valves, thus achieving the locked state.

[0018] When there is pressure at the control port X, the floating directional valve switches to the open position, causing the first and second locking balance valves to become ineffective. The center rotary swing cylinder forms a low-pressure balance circuit through the floating back pressure valve, achieving a balanced floating state.

[0019] Optionally, a movable chassis is provided on the slewing base, and a power station connected to the power transmission pipe is integrated on the movable chassis. The power station is used to provide hydraulic and / or electrical power to the power transmission pipe.

[0020] Optionally, the floating arm is equipped with a quick-connect coupling, one end of which is connected to the power transmission pipe, and the other end is used to connect to the power interface of the external ring track operation equipment.

[0021] According to another aspect of this application, a method for power transmission via a ring track is also provided, comprising the following steps:

[0022] S100, install the circular working rail in place;

[0023] S200, equipped with ring track operation equipment;

[0024] S300, adjust the pitch angle and length of the basic arm to position the center rotary swing cylinder at the geometric center of the ring rail;

[0025] S400, telescopic floating arm, aligns the pin seat with the connection point of the ring track work equipment and connects them via pins;

[0026] S500 connects the piping of the ring track work equipment to the quick-connect fittings on the floating arm.

[0027] S600, switch the center rotary swing cylinder to the locked state and confirm that the pin detection signal is normal;

[0028] When floating follow is required, the S700 switches the center rotary oscillating cylinder to a balanced floating state by controlling the oil circuit.

[0029] The S800 performs ring track operations, with the floating arm rotating synchronously with the equipment along the track to achieve continuous power transmission.

[0030] Furthermore, when the device is not in use or needs to be avoided, the control center's rotary swing cylinder is activated, causing the floating arm to rotate relative to the base arm to a parallel posture. The floating arm and the base arm are then folded to the yielding position by the base arm extension cylinder and pitch cylinder.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] This solution solves the problems of existing ring rail power transmission systems, such as the inability to move along the entire ring and the existence of blind spots, by combining the telescopic extension of the floating arm and the floating of the central rotary swing cylinder. Specifically, the length of the floating arm can be adjusted in the radial direction, ensuring that its end pin always matches the connection point with the ring rail equipment, achieving continuous connection regardless of the ring rail diameter or the position of the equipment on the ring rail. When switching to the balanced floating state, the swing cylinder does not rigidly lock but rotates around the center of the ring rail under the action of external force, allowing the floating arm to smoothly follow the equipment's movement along the ring rail for a full ring without blind spots. The base arm provides stable support for the floating arm and precisely positions the central rotary swing cylinder at the geometric center of the ring rail, ensuring that the rotation trajectory of the floating arm is completely concentric with the ring rail, thereby eliminating the travel limitations and blind spots caused by center offset. The three work together to enable the power transmission pipe to move along the entire length of the floating arm, avoiding problems such as jamming or reverse pulling of traditional drag chains or hose reels at the top of the track, and eliminating power transmission blind spots caused by layout constraints, achieving a stable and continuous full ring power supply. In addition, the floating arm, basic arm and central slewing cylinder of this device are all arranged on the outside of the track, eliminating the need to lay drag chains or hoses along the entire ring of the track, avoiding the occupation of the track cross-sectional space, ensuring the range of motion of construction machinery and operating booms on the ring track, and improving the freedom of arrangement of construction equipment.

[0033] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 This is a schematic diagram of the central rotary device used for ring track power transmission in this application;

[0036] Figure 2 This is a schematic diagram showing the coordination between the central rotary device for ring track power transmission and the ring track operation equipment in this application;

[0037] Figure 3 This is a schematic diagram of the structure of the pin socket of this application;

[0038] Figure 4 A schematic diagram showing the positions of the central slewing device and the ring track operation equipment when not in use or when avoidance is required.

[0039] Figure 5 A schematic diagram of the center rotation device when it is not in use or when it needs to avoid obstacles;

[0040] Figure 6 This is a schematic diagram of the center rotation device when it is not in use or when it needs to avoid obstacles.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Rotary base; 2. Base rotation swing cylinder; 3. Pitch cylinder; 4. Basic boom; 5. Basic boom telescopic cylinder; 6. Center rotation swing cylinder; 7. Floating boom; 8. Floating boom telescopic cylinder; 9. Proximity switch; 10. Power transmission pipe; 11. Quick-connect coupling; 12. Ring track operation equipment; 13. Pin seat; CV1.1, First locking balance valve; CV1.2, Second locking balance valve; CV2, Floating back pressure valve; CV3, Floating directional valve. Detailed Implementation

[0043] The embodiments of this application are described in detail below with reference to the accompanying drawings; however, this application may be implemented in a variety of different ways as defined and covered below.

[0044] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0045] This application discloses a central rotary device and a method for ring track power transmission.

[0046] Reference Figure 1 The central rotary device for power transmission in a ring track comprises a floating arm 7, a basic arm 4, a central rotary swing cylinder 6, and a power transmission pipe 10 arranged along the floating arm 7. The device is installed at the center of the ring track work site, with an overall radial spatial arrangement. One end of the basic arm 4 is connected to the mounting foundation, while the other end supports the floating arm 7 and the central rotary swing cylinder 6, ensuring that the central axis of the central rotary swing cylinder 6 coincides with the geometric center of the ring track. This guarantees a uniform power transmission path and eliminates blind spots during operation.

[0047] The basic boom 4 serves as the main load-bearing component, supporting the floating boom 7 and its power transmission system, and ensuring that the rotation center of the floating boom 7 remains stable at the geometric center of the ring track under various working postures. This support arrangement avoids the power supply dead zones and operational blind spots caused by the rotation mechanism deviating from the center in traditional solutions.

[0048] The floating arm 7 is designed as a telescopic structure. In this embodiment, it is preferably driven by a telescopic hydraulic cylinder 8, and an external guide rail is provided to ensure the stability of the telescopic process. The end of the floating arm 7 is mechanically connected to the ring rail working device 12 through a pin seat 13. After the pin is inserted, a rigid lock is formed, which facilitates quick installation and disassembly and ensures stable force transmission during operation.

[0049] The power transmission pipe 10 is arranged along the length of the floating arm 7, fixed to the floating arm 7 by pipe clamps, and covered with a wear-resistant protective sleeve to prevent damage caused by friction or impact from foreign objects during operation. The power transmission pipe 10 can transmit hydraulic oil, electricity, or a combination of both according to the operation requirements, thus adapting to various types of ring track operation equipment 12.

[0050] Reference Figure 2 The central rotary swing cylinder 6 is hinged to the floating arm 7, and its control oil circuit allows it to switch between a locked state and a balanced floating state. In the locked state, the central rotary swing cylinder 6 fixes the angular position of the floating arm 7 to prevent it from rotating freely; in the balanced floating state, the floating arm 7 can rotate around the central axis of the central rotary swing cylinder 6 under the action of external force, thereby achieving follow-up coordination and ensuring that the power transmission pipe 10 maintains continuous connection and flexible following with the working equipment during the movement of the ring track equipment along the track.

[0051] This structural design not only solves the problem that existing ring track power transmission devices cannot achieve full-ring follow-up and have blind spots, but also provides flexible mechanical and power interfaces during equipment installation, adjustment and obstacle avoidance, making power transmission more efficient and reliable.

[0052] Reference Figure 1 In one embodiment, the end of the base arm 4 furthest from the floating arm 7 is rotatably connected to the mounting base via a slewing base 1. The slewing base 1 allows the base arm 4 to be pitched around a horizontal axis. A pitch cylinder 3 is provided between the base arm 4 and the slewing base 1. One end of the pitch cylinder 3 is fixedly connected to the slewing base 1, and the other end is fixedly connected to the base arm 4. The pitch angle of the base arm 4 can be precisely adjusted by hydraulic control.

[0053] This pitch adjustment structure precisely positions the rotation axis of the central rotary swing cylinder 6 to the geometric center of the ring rail during device installation or changes in the ring rail position. This ensures that the floating arm 7 remains concentric with the ring rail during extension, retraction, and rotation, preventing positional deviations. Controlled by the pitch cylinder 3, the basic arm 4 can be adjusted vertically within a wide range to adapt to ring rail work sites of varying heights and inclination angles, improving the device's installation adaptability and operational flexibility. The pitch adjustment function can also be used in conjunction with the basic arm extension cylinder 5 to fold and retract the floating arm 7 to a safer position when the device is not in operation, reducing interference with the work site and the ring rail equipment's operating space, thereby improving equipment utilization and operational safety.

[0054] In one embodiment, the basic arm 4 is designed as a telescopic structure to accommodate changes in the diameter of different ring rails or the installation position. The basic arm 4 consists of an outer tube and an inner extension tube. The outer tube is connected to the rotary base 1, and the end of the inner extension tube is connected to the central rotary swing cylinder 6.

[0055] A basic arm telescopic cylinder 5 is installed between the outer tube and the inner extension tube. The cylinder body of the telescopic cylinder is fixedly connected to the outer tube, and the piston rod is fixedly connected to the inner extension tube. By hydraulically controlling the extension or retraction of the piston rod of the telescopic cylinder, the length of the basic arm 4 can be continuously adjusted. To ensure the smoothness of the telescopic movement and the structural strength, wear-resistant bushings and guide structures are provided at the sliding contact points between the outer tube and the inner extension tube to prevent jamming or wear caused by lateral forces.

[0056] This telescopic structure allows for precise adjustment of the central rotary swing cylinder 6 to the ideal position during the installation and commissioning phase, based on the ring track radius, the installation location of the working equipment, and the specific requirements of the workspace. This ensures that the telescopic range of the floating arm 7 is reasonable and the power transmission path is smooth. When the device is not in operation, the telescopic cylinder can shorten the basic arm 4 and fold it in conjunction with the pitch cylinder 3 to achieve overall retraction. This minimizes space requirements and facilitates equipment avoidance and storage.

[0057] Reference Figure 3 In one embodiment, the distal end of the floating arm 7 is provided with a pin seat 13, which is rigidly connected to the main structure of the floating arm 7. Its position and orientation match the connection point of the ring track working device 12. The pin seat 13 is machined with a through pin hole for inserting a positioning pin to achieve a reliable connection between the floating arm 7 and the ring track working device 12.

[0058] To ensure connection safety and operational reliability, two proximity switches 9 are arranged axially along the pin hole on the pin holder 13, located at different depths within the pin hole. The proximity switches 9 are used to detect the pin insertion status in real time—when the pin is fully inserted and reaches the designed positioning depth, both proximity switches 9 are triggered, and the control system determines that the pin is securely locked; when the pin is not fully inserted or becomes loose, at least one proximity switch 9 will not be triggered, and the system will issue an alarm or prevent the central rotary swing cylinder 6 from switching to a floating state to avoid equipment detachment or damage due to loose connection.

[0059] The arrangement of the two proximity switches 9 provides redundant detection, improving safety and fault diagnosis capabilities. Simultaneously, the detection signals can be interlocked with the switching logic of the control oil circuit, ensuring that the floating arm 7 can only enter floating servo operation when fully locked, thereby guaranteeing the stability of the entire servo operation and the safety of personnel and equipment.

[0060] Reference Figure 4In one embodiment, the control oil circuit of the central rotary swing cylinder 6 includes: a first locking balance valve CV1.1, a second locking balance valve CV1.2, a floating back pressure valve CV2, and a floating directional valve CV3, and is provided with a control oil port X connected to the hydraulic system of the ring track operation equipment 12. The central rotary swing cylinder 6 has two oppositely arranged chambers, chamber A and chamber B. Chamber A is connected to the inlet end of the first locking balance valve CV1.1, and chamber B is connected to the inlet end of the second locking balance valve CV1.2. The outlet ends of the first locking balance valve CV1.1 and the second locking balance valve CV1.2 are respectively connected to the floating back pressure valve CV2 and the floating directional valve CV3, wherein the two ends of the floating back pressure valve CV2 are respectively connected to chamber A and chamber B, forming a hydraulic circuit capable of bidirectional overflow.

[0061] When there is no pressure signal at the control port X, the floating directional valve CV3 remains in the closed position, and the first locking balance valve CV1.1 and the second locking balance valve CV1.2 are both in the locked state, sealing the oil in chambers A and B within the cylinder body, thereby fixing the piston of the central rotary swing cylinder 6 and keeping the floating arm 7 in its current position, achieving rigid locking.

[0062] When there is a pressure signal at control port X, the floating directional valve CV3 switches to the open position, releasing the locking action of the first locking balance valve CV1.1 and the second locking balance valve CV1.2. The oil between chambers A and B can then flow bidirectionally through the floating back pressure valve CV2, forming a low-pressure balance circuit. An external force can drive the floating arm 7 to reciprocate the piston rod of the central rotary swing cylinder 6, causing the oil to flow slowly between the two chambers. The floating back pressure valve CV2 provides damping and back pressure, achieving balanced follow-up of the floating arm 7.

[0063] Through the above-mentioned oil circuit design, the device can be stably positioned in the locked state, avoiding position drift caused by external forces during operation; in the balanced floating state, it can achieve ring rail follow-up without additional drive, and use back pressure damping to reduce inertial impact, ensuring the continuity and stability of power transmission.

[0064] In another embodiment, the floating back pressure valve CV2 adopts an adjustable structure. By adjusting the opening pressure of the back pressure valve according to the weight, operating speed, and resistance of different ring track operating equipment 12, optimal matching of rotational damping in the floating state can be achieved, preventing swaying or impact caused by excessive inertia. Furthermore, to improve the safety of the oil circuit, a check valve or throttle valve can be connected in series between the control port X and the floating directional valve CV3 to prevent malfunction or oil flow impact.

[0065] In one embodiment, a base rotary swing cylinder 2 is installed between the rotary base 1 and the basic arm 4 to drive the basic arm 4 to rotate and swing relative to the rotary base 1 in a horizontal plane. Specifically, one end of the cylinder body of the base rotary swing cylinder 2 is hinged to a fixed bracket of the rotary base 1, and the piston rod end is hinged to a connecting lug plate on the side of the basic arm 4 near the base. When hydraulic oil is input into the rod-side or rodless-side chamber of the base rotary swing cylinder 2, the piston rod contracts or extends, thereby driving the basic arm 4 to rotate around a vertical axis, realizing the overall horizontal angle adjustment of the floating arm 7 and the central rotary swing cylinder 6.

[0066] In one embodiment, a movable chassis is mounted on the rotating base 1, and a power station connected to the power transmission pipe 10 is integrated on the movable chassis. The power station provides hydraulic power and / or electricity to the ring track operation equipment 12. Its hydraulic output section includes a hydraulic pump, hydraulic oil tank, pressure regulating valve group, and safety overflow device, and the output can be adjusted according to the rated pressure and flow of the operation equipment. The electrical output section can use a generator set or battery pack, in conjunction with a frequency converter and voltage stabilizing module to achieve stable power supply. The output end of the power station is connected to the power transmission pipe 10 on the floating arm 7 through a high-pressure hydraulic hose. The hydraulic interface is equipped with a quick-connect coupling, and the electrical interface uses a waterproof and dustproof socket to ensure safety and reliability under harsh working conditions.

[0067] The movable chassis can be equipped with different walking structures depending on the application scenario. For example, it uses a track wheel structure when running on fixed tracks, and a universal wheel structure with braking function when working on flat ground. The chassis is equipped with support feet or hydraulic outriggers to fix the chassis during operation and prevent positional displacement caused by vibration or external forces during power station operation, thereby ensuring the stability of power transmission and the alignment accuracy of the central rotary device.

[0068] In one embodiment, the floating arm 7 is equipped with a quick-connect coupling 11. One end of the quick-connect coupling 11 is connected to the power transmission pipe 10, and the other end is used to connect to the power interface of the external ring track operation equipment 12. The quick-connect coupling 11 can be divided into two types according to the power transmission medium: hydraulic and electric. The hydraulic quick-connect coupling 11 uses high-pressure wear-resistant sealing material and has a self-sealing valve core structure, which can automatically close the oil circuit when the coupling is disconnected to prevent hydraulic oil leakage; the electric quick-connect coupling 11 uses an industrial-grade waterproof and dustproof interface, with a protection level of IP65 or higher, ensuring safe operation in outdoor or dusty and high-humidity environments.

[0069] Furthermore, to achieve rapid connection and leak-proof functionality, the hydraulic quick-connect coupling 11 features a double-seal ring structure and employs a locking method combining conical self-locking and snap ring positioning; the electric quick-connect coupling 11 uses a rotating locking ring with an elastic buckle to ensure proper insertion and prevent loosening. Both types of quick-connect couplings 11 can be operated with one hand, improving on-site connection efficiency; and the coupling body is equipped with an anti-misinsertion positioning key structure to prevent mixing of couplings of different media or specifications, thus preventing equipment damage or safety accidents caused by incorrect connections. This quick-connect coupling 11 not only improves the mobility and installation efficiency of the power transmission system in a ring track operation environment but also significantly reduces the risk of leakage and failure rate during the connection process, enhancing overall operational safety and reliability.

[0070] The ring track power transmission method includes the following steps:

[0071] S100, install the circular working rail in place;

[0072] S200, equipped with 12 ring track operation devices;

[0073] S300, adjust the pitch angle and length of the basic arm 4 so that the center rotary swing cylinder 6 is positioned at the geometric center of the ring rail;

[0074] S400, telescopic floating arm 7, aligns the pin seat 13 with the connection point of the ring track operation equipment 12, and connects them through the pin;

[0075] S500, connect the pipeline of the ring track operation equipment 12 to the quick-connect fitting 11 on the floating arm 7;

[0076] S600, switch the center rotary swing cylinder 6 to the locked state and confirm that the pin detection signal is normal;

[0077] When floating and following is required, the S700 switches the center rotary swing cylinder 6 to a balanced floating state by controlling the oil circuit.

[0078] The S800 performs ring track operation, with the floating arm 7 rotating synchronously with the equipment along the track to achieve continuous power transmission.

[0079] First, the circular working rail is installed at the target working position using brackets or fixing devices, and its geometric center position and levelness are calibrated to ensure that the subsequent power transmission device can operate in the ideal spatial position. This process ensures the stability and accuracy of the circular rail, laying the foundation for full-ring follow-up conveying. Next, the circular rail working device 12 is installed on the circular rail, and the cooperation between its running mechanism and the rail is checked to ensure smooth operation along the rail. This step ensures the smoothness and positioning accuracy of the working device, avoiding jamming and impact caused by rail mismatch. Then, by adjusting the pitch cylinder 3 and extension cylinder 5 of the basic arm 4, the central rotary swing cylinder 6 is precisely positioned at the geometric center of the circular rail. This center positioning method ensures that the floating arm 7 covers the entire circular rail range when rotating, thereby eliminating the blind spot problem existing in the prior art.

[0080] After positioning, the floating arm 7 is extended and retracted along its length, aligning the pin seat 13 at the end of the floating arm 7 with the connection point of the ring track working device 12, and inserting the pin to complete the mechanical connection. The dual proximity switches 9 on the pin seat 13 detect the pin insertion status to ensure a safe and reliable connection. Subsequently, the hydraulic lines and / or cables of the working device are connected to the quick-connect couplings 11 on the floating arm 7 to achieve a fast, leak-free power interface connection, improving work preparation efficiency.

[0081] After completing the mechanical and power connections, the central rotary swing cylinder 6 is switched to the locked state via the control oil circuit, and the pin detection signal is confirmed to be normal. In the locked state, the floating arm 7 is fixed in its current position, capable of withstanding inertial impacts and vibrations during equipment operation, ensuring conveying stability. During operation, if floating is required, the control oil circuit pressurizes the control port X, causing the floating reversing valve CV3 to open, disabling the first locking balance valve CV1.1 and the second locking balance valve CV1.2. The central rotary swing cylinder 6 forms a low-pressure balance circuit via the floating back pressure valve CV2, entering a balanced floating state. At this time, the floating arm 7 can rotate around the central rotary swing cylinder 6 under external force, achieving synchronous movement with the equipment. Finally, during ring track operation, the floating arm 7 rotates synchronously along the track with the operating equipment, achieving continuous supply of hydraulic power and / or electricity, preventing cable entanglement, excessive bending, or interruption of conveying.

[0082] Reference Figure 5 and Figure 6 In another embodiment, when the device is not in use or needs to be avoided, the control center rotary swing cylinder 6 is activated, causing the floating arm 7 to rotate relative to the base arm 4 to a parallel posture. The base arm extension cylinder 5 and the pitch cylinder 3 work together to fold the floating arm 7 and the base arm 4 to a clearance position, thereby avoiding occupying the work area or interfering with the operation of other equipment.

[0083] Specifically, oil is supplied to the central rotary swing cylinder 6 via the control oil circuit, causing its piston rod to extend and retract, driving the floating arm 7 to rotate around the rotation axis of the central rotary swing cylinder 6, gradually bringing the floating arm 7 closer to a position parallel to the basic arm 4. During this process, the connection between the end of the floating arm 7 and the ring track operation equipment 12 is released, and the pin is pulled out, ensuring that the rotation process does not cause mechanical interference with external equipment. When the floating arm 7 is parallel to the basic arm 4, the basic arm extension cylinder 5 is activated, driving the extension section of the basic arm 4 to retract inward, thereby shortening the length of the basic arm 4, reducing the overall radius, and reducing the space occupation and rotational inertia during subsequent folding. Subsequently, the pitch cylinder 3 drives the basic arm 4 to flip around the pitch rotation axis of the rotary base 1, folding the parallel stacked basic arm 4 and floating arm 7 as a whole to a preset yielding position. This yielding position can be folded downward to a low-level parking area or flipped upward to a high-level parking area, to adapt to the spatial layout requirements of different work sites.

[0084] The implementation principle of the central rotary device for power transmission in the ring track according to this application embodiment is as follows: the device, through the combination of the basic arm 4 and the floating arm 7, achieves precise positioning of the central rotary swing cylinder 6 at the geometric center of the ring track. The basic arm 4 provides rigid support and has pitch and telescopic adjustment capabilities, enabling the device to be centrally positioned in ring tracks of different heights and radii; the floating arm 7 adopts a radial telescopic structure, which can adjust the engagement radius with the ring track while maintaining a reliable connection between the power transmission pipe 10 and the ring track operating equipment 12. During operation, the central rotary swing cylinder 6 serves as the core rotating unit. It can switch between a locked state and a balanced floating state via a control oil circuit: In the locked state, both chambers of the swing cylinder are locked by the locking balance valve, and the floating arm 7 is fixed at the current angle, suitable for operation stages requiring rigid support; in the balanced floating state, control port X is pressurized, the floating reversing valve CV3 is activated, the locking balance valve is deactivated, and the two chambers of the swing cylinder form a low-pressure bidirectional overflow circuit through the floating back pressure valve CV2, enabling the floating arm 7 to rotate synchronously along the ring track with the working equipment under external force, thus achieving full-ring follow-up power transmission without blind spots. The power transmission pipe 10 is arranged along the floating arm 7, continuously transmitting hydraulic oil and / or electricity from the power station to the ring track working equipment 12. The quick-connect coupling 11 at the end of the floating arm 7 facilitates quick connection or disassembly of the equipment, and the proximity switch 9 detects the pin insertion status to ensure safe connection. When the device is not in use or needs to avoid obstacles, the central rotary swing cylinder 6 drives the floating arm 7 and the basic arm 4 to a parallel position. Then, the basic arm extension cylinder 5 shortens the length, and the pitch cylinder 3 folds the two together to the passing position, achieving a compact fold and avoiding occupation of the work area or interference with the operation of other equipment. This structural principle not only solves the problem of blind spots in the operation of existing ring rail power transmission systems, but also improves adaptability, storage convenience, and on-site operation safety.

[0085] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A central rotary device for ring track power transmission, characterized in that, include: The floating arm (7) is capable of extending and retracting along its length, and the end of the floating arm (7) is used to connect with the ring track operation equipment (12); A power delivery pipe (10), arranged along the floating arm (7), is used to deliver hydraulic power and / or electricity to the ring track work equipment (12); The central rotary swing cylinder (6) is connected to the floating arm (7). The central rotary swing cylinder (6) has a control oil circuit. The control oil circuit is used to control the central rotary swing cylinder (6) to be in a locked state or a balanced floating state. In the locked state, the floating arm (7) is fixed in the current position. In the balanced floating state, the floating arm (7) is used to rotate around the central rotary swing cylinder (6) under the action of external force to achieve follow-up coordination. The basic arm (4) is used to support the floating arm (7) and the central rotary swing cylinder (6), so that the central rotary swing cylinder (6) is positioned at the geometric center of the ring rail; A rotary base (1) is provided at the end of the basic arm (4) away from the floating arm (7). The basic arm (4) and the rotary base (1) are rotatably engaged. A pitch cylinder (3) for adjusting the pitch angle of the basic arm (4) is provided between the basic arm (4) and the rotary base (1). The basic arm (4) is a telescopic structure, and the basic arm (4) is equipped with a basic arm telescopic cylinder (5) for controlling the telescopic movement; The floating arm (7) is provided with a pin seat (13), the pin seat (13) has a pin hole for inserting a pin, and a proximity switch (9) for detecting the pin insertion state is installed on the pin seat (13). The control oil circuit of the central rotary swing cylinder (6) includes: a first locking balance valve, a second locking balance valve, a floating back pressure valve and a floating reversing valve, and is provided with a control oil port X for connecting to the ring track operation equipment (12); The first chamber of the central rotary swing cylinder (6) is connected to the inlet end of the first locking balance valve (CV1.1); the second chamber of the central rotary swing cylinder (6) is connected to the inlet end of the second locking balance valve (CV1.2); the outlet end of the first locking balance valve (CV1.1) is connected to the floating back pressure valve (CV2); and the outlet end of the second locking balance valve (CV1.2) is connected to the floating directional valve (CV3). The floating back pressure valve (CV2) and the two chambers of the central rotary swing cylinder (6) form a circuit that can overflow in both directions; When there is no pressure at the control port X, the floating directional valve (CV3) is in the closed position, which causes the first locking balance valve (CV1.1) and the second locking balance valve (CV1.2) to lock the center rotary swing cylinder (6) and achieve the locked state. The floating directional valve (CV3) is also used to switch to the open position when there is pressure at the control port X, so that the first locking balance valve (CV1.1) and the second locking balance valve (CV1.2) are ineffective, and the center rotary swing cylinder (6) forms a low-pressure balance circuit through the floating back pressure valve (CV2) to achieve a balanced floating state.

2. The central rotary device for ring track power transmission according to claim 1, characterized in that: Two proximity switches (9) are provided along the axial direction of the pin hole.

3. The central rotary device for ring track power transmission according to claim 1, characterized in that: A movable chassis is provided on the slewing base (1), and a power station connected to the power transmission pipe (10) is integrated on the movable chassis. The power station is used to provide hydraulic and / or electrical power to the power transmission pipe (10).

4. The central rotary device for ring track power transmission according to claim 1, characterized in that: The floating arm (7) is equipped with a quick-connect connector (11). One end of the quick-connect connector (11) is connected to the power transmission pipe (10), and the other end is used to connect to the power interface of the external ring track operation equipment (12).

5. A method for conveying power via a ring track, using the central rotary device for conveying power via a ring track as described in any one of claims 1-4, characterized in that, Includes the following steps: S100, install the ring rail in place; S200, install ring track operation equipment (12); S300, adjust the pitch angle and length of the basic arm (4) so ​​that the center rotary swing cylinder (6) is positioned at the geometric center of the ring rail; S400, telescopic floating arm (7), connects the pin seat (13) to the ring track operation equipment (12); S500, connect the pipeline of the ring track operation equipment (12) to the power transmission pipe on the floating arm (7); S600, switch the center rotary swing cylinder (6) to the locked state and confirm that the pin detection signal is normal; S700, when floating follow is required, switches the center rotary swing cylinder (6) to the balanced floating state by controlling the oil circuit; S800 performs ring track operation. The floating arm (7) rotates synchronously along the ring track with the ring track operation equipment (12) to achieve continuous power transmission.

6. The ring track power transmission method according to claim 5, characterized in that: When the central slewing device used for the ring track power transmission is not in use or needs to give way, the central slewing swing cylinder (6) is activated to make the floating arm (7) rotate relative to the basic arm (4) to a parallel posture. The floating arm (7) and the basic arm (4) are folded to the giving way position by the basic arm telescopic cylinder (5) and the pitch cylinder (3).

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