An internal inspection device for a high vertical section of a water diversion channel and an inspection method thereof

Abstract

This invention provides an internal maintenance device and method for a high vertical section of a water diversion channel. The device includes a channel, an internal inspection device, and multiple cable carriers connected end-to-end. The inspection device includes an openable V-shaped support, with the end of the cable carrier hinged to the V-shaped support. A rotating top beam is located at the bottom of the V-shaped support, and a lifting bottom beam is located at the bottom of the top beam. A slewing mechanism is provided between the V-shaped support and the top beam. The multiple cable carriers form a cable carrier array, and the inspection device is first assembled in the high horizontal section. One end of the V-shaped support rests against the high curved section. Opening the V-shaped support drives the slewing mechanism to perform circumferential inspection of the vertical section. The vertical section is inspected from top to bottom by driving the lifting of the bottom beam. Personnel and goods can reach the guardrail through the cable carrier array, avoiding the problems of limited inspection range, small coverage area, low operational efficiency, and poor overall inspection quality associated with drones.

Description

Technical Field

[0001] This invention relates to the field of hydropower station pipeline maintenance, and in particular to an internal maintenance device and method for the high vertical section of a water diversion channel. Background Technology

[0002] The internal pipeline system of the hydropower station is complex and extensive. Its intake channel is a concrete structure, and after long-term erosion by water flow, sand, gravel, and other debris, its flow surface has suffered some erosion and damage, requiring pipeline maintenance. The water diversion channel, from top to bottom, includes a high-zone horizontal section, a high-zone bend section, a vertical section, a low-zone bend section, and a low-zone horizontal section.

[0003] Currently, the overall overhaul of the inlet water channel only involves inspection and repair of the bottom plate of the horizontal section. During the overhaul of the vertical section, the relatively enclosed space of the water channel and the limited space for equipment entry restrict the use of conventional lifting equipment on-site. Furthermore, maintaining stable operation in a large-diameter, high-vertical-drop channel is difficult, making close-range inspection and high-altitude repair extremely challenging. The vertical section can only be inspected and recorded using drones. However, the limited range of drones not only fails to achieve full coverage of the channel but also significantly impacts work efficiency and overall overhaul quality. Moreover, when problems arise in the vertical section requiring repair, access for personnel or equipment is extremely difficult, leading to significant challenges in vertical section maintenance. Summary of the Invention

[0004] This invention provides an internal maintenance device and method for the high vertical section of a water diversion channel, which solves the problems of the relatively enclosed and narrow space of the water diversion channel, the limited use of conventional lifting equipment on site, the difficulty in maintaining stability in the operation of large-diameter, high vertical drop channels, the fact that the vertical section of the water diversion channel can only be inspected by drones, which cannot achieve full coverage of channel maintenance and has low work efficiency.

[0005] Another technical problem solved by this invention is that when the vertical section of the water diversion channel needs maintenance, it is extremely difficult for personnel or equipment to enter the vertical section for inspection, which leads to difficulties in maintaining the vertical section.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an internal inspection device and method for a high vertical section of a water diversion channel, including a channel, an inspection device and multiple cable carts inside the channel, the multiple cable carts being connected end to end, the inspection device including an openable and closable V-shaped support, the cable carts at the ends being hinged to the V-shaped support, the bottom of the V-shaped support having a rotating top beam, the bottom of the top beam having a lifting bottom beam, and a rotation mechanism being provided between the V-shaped support and the top beam.

[0007] In the preferred embodiment, the flow channel includes, from top to bottom, a high-zone horizontal section, a high-zone curved section, a vertical section, a low-zone curved section, and a low-zone horizontal section. An electric chain cart is installed on the high-zone horizontal section. The electric chain cart is connected to a V-shaped support. The connection section between the V-shaped support and the electric chain cart abuts against the inner wall of the high-zone curved section.

[0008] In the preferred embodiment, the cable car includes a main beam, with multiple support arms at the bottom of the main beam, multiple connecting brackets on the main beam, detachable enclosures on the connecting brackets, a front hook and a rear hook at each end of the main beam, and a hinged seat on the main beam.

[0009] In the preferred embodiment, the enclosed fence includes two U-shaped connecting parts connected by a first bolt. The support arm is equipped with multiple traveling wheels, and the end of the main beam is provided with a notch. A rotating shaft is provided on the notch, and the front hook is rotatably connected to the rotating shaft.

[0010] In the preferred embodiment, the V-shaped support includes a base frame, one end of which is equipped with a jack, and the other end of which is rotatably connected to a hinged seat on the main beam. The base frame is equipped with a rotatably connected inclined frame, and multiple cable seats are provided on the inclined frame. Multiple winches are provided on the inclined frame, and the winches are connected to the cable seats via cables.

[0011] In the preferred embodiment, the slewing mechanism includes a mounting frame, a slewing motor mounted on the mounting frame, a main gear mounted on the slewing motor, a meshing driven gear mounted on the main gear, a bottom sleeve at the bottom of the driven gear, the bottom sleeve being connected to the bottom beam, and the mounting frame being connected to the bottom frame of the V-shaped support.

[0012] In the preferred embodiment, a seeding adjustment mechanism is provided at one end of the bottom beam. The seeding adjustment mechanism includes a counterweight frame, a frame sleeve on the counterweight frame, the frame sleeve sliding against the bottom beam, and a longitudinally sliding counterweight block on the counterweight frame.

[0013] In the preferred embodiment, a horizontal cylinder is provided at one end of the bottom beam, and one end of the horizontal cylinder is connected to the counterweight frame. The counterweight frame is provided with multiple guide rods, and the counterweight block is provided with multiple guide holes. The counterweight block abuts against the guide holes. A transverse cylinder is provided on one side of the counterweight frame, and the transverse cylinder is connected to the counterweight block.

[0014] In the preferred embodiment, a second winch is provided at both ends of the bottom beam, the second winch is connected to the top beam, and a guardrail is provided at one end of the bottom beam.

[0015] A method for inspecting an internal inspection device in a high vertical section of a water diversion channel, characterized by: S1, Inspection preparation: Multiple cable car trolleys are connected end to end and abut against the high horizontal section, V-shaped supports are connected to the cable car trolleys at the ends, and the cable car trolleys at the other ends are connected by a tractor, and the V-shaped supports are closed. S2. The detection device moves to the high-angle curve section: Slowly release the steel cable of the tractor, and multiple tractor cars slide to the high-angle curve section. Slowly release the steel cable of the electric chain car so that the tractor cars at the opposite ends of the V-shaped support rotate until the inclined frame abuts against the inner wall of the high-angle curve section. S3, V-shaped support positioning: Drive multiple winches to make the bottom frame rotate relative to the inclined frame, open the V-shaped support, make the bottom frame horizontal, drive the jacks to make the jacks abut against the inner wall of the vertical section; S4. Staff in position: After passing through the enclosed area of ​​multiple chain-driven trucks, staff enter the guardrail, proceed from the horizontal section of the high zone to the end of the vertical section, and adjust the breeding adjustment mechanism to ensure the overall structural stability. S5. Vertical section maintenance: Drive the slewing mechanism to rotate the top beam and bottom beam, and personnel perform circumferential maintenance on the vertical section. Drive the second winch to raise and lower the bottom beam, and perform maintenance on the vertical section from high to low.

[0016] The beneficial effects of this invention are as follows: Multiple cable carriers form a cable carrier array and a detection device are first assembled in the high-level horizontal section. The cable carrier array is slowly moved to the high-level curved section by its own gravity or manual pushing force. The closed V-shaped support is slowly rotated by an electric chain car so that one end of the inclined frame of the V-shaped support slowly abuts against the high-level curved section. The V-shaped support is opened so that the bottom frame rotates relative to the inclined frame and the bottom frame is horizontal. The V-shaped support is positioned by a jack against the inner wall of the flow channel. At this time, the bottom frame, top beam and bottom beam are all in a horizontal state.

[0017] The vertical section is inspected from top to bottom by driving the rotation mechanism and the vertical section is inspected from top to bottom by driving the lifting of the bottom beam. Personnel and goods can reach the guardrail through the drag chain vehicle array. Large lifting equipment is avoided during the vertical section inspection process so that the inspection device can inspect the vertical section. At the same time, the V-shaped support, top beam and bottom beam run relatively smoothly in the large-diameter, high vertical drop channel, achieving full coverage of vertical section inspection.

[0018] The overall structure avoids the use of drones for inspection, thus avoiding the problems of small inspection range, limited coverage, low operational efficiency, and poor overall inspection quality associated with drones.

[0019] The cable carrier array also carries deployable maintenance equipment, which is transported to the guardrail location for comprehensive inspection of the vertical section. This improves the ease of maintenance for the water diversion channel. When maintenance is needed on a vertical section of the water diversion channel, personnel carry the equipment to the guardrail location. By driving the adjustment mechanism, the weight of the personnel or equipment is adjusted to maintain the stability of the overall structure, preventing difficulties in accessing the vertical section for maintenance and avoiding the problems that would otherwise hinder maintenance. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is an internal view of the high-angle curved section of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is an axonometric view of the detection device of the present invention; Figure 4 This is a side view of the detection device of the present invention; Figure 5 This is an axial view of the V-shaped support of the present invention; Figure 6 This is an axonometric view of a partial structure of the present invention; Figure 7 This is the present invention. Figure 6 A magnified view of A in the middle; Figure 8 This is the present invention. Figure 6 A magnified view of B in the middle; Figure 9 This is an axonometric view of the cable car of the present invention; Figure 10 This is an axonometric view of a partial structure of the cable car of the present invention; Figure 11 This is the present invention. Figure 10 A magnified view of C; Figure 12 This is a side view of a partial structure of the cable car of the present invention; Detailed Implementation Example 1: like Figures 1-12 The present invention discloses an internal maintenance device and method for a high vertical section of a water diversion channel, comprising a channel 1, inside which are a detection device 3 and multiple cable carriers 2 connected end-to-end. The detection device 3 includes an openable V-shaped support 4, with the end cable carriers 2 hinged to the V-shaped support 4. The bottom of the V-shaped support 4 is provided with a rotating top beam 8, and the bottom of the top beam 8 is provided with a lifting bottom beam 5. A slewing mechanism 6 is provided between the V-shaped support 4 and the top beam 8. With this structure, when maintenance is required on the vertical section 103, the multiple cable carriers 2 cooperate and connect to form a cable carrier array, creating a passage for personnel and materials. Multiple chain trailers 2 form a chain trailer array and a detection device 3, which are first assembled in the high-level horizontal section 101. The chain trailer array is slowly moved to the high-level curved section 102 by its own weight or manual pushing. The closed V-shaped support 4 is slowly rotated by the electric chain trailer 10 so that one end of the inclined frame 402 of the V-shaped support 4 slowly abuts against the high-level curved section 102. The V-shaped support 4 is opened so that the bottom frame 401 rotates relative to the inclined frame 402. The bottom frame 401 is horizontal and is positioned by the jack 403 against the inner wall of the flow channel 1. At this time, the bottom frame 401, the top beam 8 and the bottom beam 5 are all in a horizontal state.

[0021] The vertical section 103 is inspected circumferentially by driving the rotary mechanism 6, and the vertical section 103 is inspected from top to bottom by driving the lifting of the bottom beam 5. Personnel and goods can reach the guardrail 9 through the chain-driven vehicle array. Large lifting equipment is avoided during the inspection of the vertical section 103 so that the inspection device 3 can inspect the vertical section 103. At the same time, the V-shaped support 4, the top beam 8 and the bottom beam 5 run relatively smoothly in the large-diameter, high-vertical-drop channel, achieving full coverage of the inspection of the vertical section 103.

[0022] The overall structure avoids the use of drones for inspection, thus avoiding the problems of small inspection range, limited coverage, low operational efficiency, and poor overall inspection quality associated with drones.

[0023] The cable carrier array also carries deployable maintenance equipment. This equipment reaches the guardrail 9 to be inspected, allowing for a comprehensive inspection of the vertical section 103. This improves the ease of maintenance for the water diversion channel. When maintenance is needed on the vertical section 103, personnel carry the equipment to the guardrail 9. The weight of the personnel or equipment is adjusted using the seed adjustment mechanism 7 to maintain the stability of the overall structure, preventing difficulties in accessing the vertical section 103 for maintenance.

[0024] In the preferred embodiment, the flow channel 1 includes, from top to bottom, a high-level horizontal section 101, a high-level curved section 102, a vertical section 103, a low-level curved section 104, and a low-level horizontal section 105. An electric chain cart 10 is mounted on the high-level horizontal section 101. The electric chain cart 10 is connected to a V-shaped support member 4, and the connection between the V-shaped support member 4 and the electric chain cart 10 rests against the inner wall of the high-level curved section 102. With this structure, when the electric chain cart 10 is connected to the V-shaped support member 4, the angle between the overall structure of the V-shaped support member 4 and the vertical direction is small at the beginning of the connection. When the steel cable of the electric chain cart 10 is released, the angle between the V-shaped support member 4 and the vertical direction slowly increases until the inclined frame 402 rests against the inner wall of the flow channel 1.

[0025] In the preferred embodiment, the chain carrier 2 includes a main beam 201, with multiple support arms 202 at its bottom and multiple connecting brackets 204 on its surface. Each connecting bracket 204 has a detachable enclosure 205. A front hook 206 and a rear hook 207 are located at opposite ends of the main beam 201, and a hinged seat is also provided on the main beam 201. With this structure, when maintenance is required on the vertical section 103, multiple chain carriers 2 can be connected to form a chain carrier array, creating a passageway for personnel and materials. The chain carrier 2 is equipped with a hinged seat, which is rotatably connected to the base frame 401.

[0026] In the preferred embodiment, the enclosure 205 includes two U-shaped connecting parts 2051, which are connected by a first bolt 2052. Multiple wheels 203 are mounted on the support arm 202. A notch is provided at the end of the main beam 201, and a rotating shaft 2011 is mounted on the notch. The front hook 206 is rotatably connected to the rotating shaft 2011. With this structure, the enclosure 205 is detachable. The enclosure 205 is connected to the connecting bracket 204 by a second bolt. The front hook 206 is rotatably connected to the main beam 201, and the rear hook 207 has a U-shaped structure. The multiple wheels 203 abut against the inner wall of the flow channel 1.

[0027] Multiple chain trailers 2 form a chain trailer array and detection device 3, which are first assembled in the high-level horizontal section 101. The chain trailer array is slowly moved to the high-level curved section 102 by its own gravity or manual pushing force, and the closed V-shaped support 4 is slowly rotated by the electric chain trailer 10.

[0028] In the preferred embodiment, the V-shaped support 4 includes a base frame 401, with a jack 403 at one end and the other end rotatably connected to a hinged seat on the main beam 201. A rotatably connected inclined frame 402 is mounted on the base frame 401, with multiple cable holders 404 and multiple winches 405. The winches 405 are connected to the cable holders 404 via cables. With this structure, by driving the multiple winches 405, the base frame 401 rotates relative to the inclined frame 402 until it becomes horizontal. The jack 403 abuts against the inner wall of the flow channel 1 to form the V-shaped support 4 for positioning, thus stabilizing the overall structure.

[0029] In the preferred embodiment, the rotary mechanism 6 includes a mounting frame 601, a rotary motor 602 mounted on the mounting frame 601, a main gear 603 mounted on the rotary motor 602, a meshing driven gear 604 mounted on the main gear 603, a bottom sleeve 605 at the bottom of the driven gear 604, the bottom sleeve 605 being connected to the bottom beam 5, and the mounting frame 601 being connected to the bottom frame 401 of the V-shaped support 4. With this structure, the top of the mounting frame 601 has multiple top sleeves 606, which are connected to the bottom frame 401.

[0030] Drive the rotary motor 602 to make the main gear 603 rotate, which in turn makes the driven gear 604 rotate, which makes the bottom sleeve 605 rotate relative to the mounting bracket 601, which makes the bottom beam 5 rotate relative to the V-shaped support 4, which makes the top beam 8, bottom beam 5 and guardrail 9 rotate, so as to realize the circumferential maintenance of the vertical section 103.

[0031] In the preferred embodiment, a seeding adjustment mechanism 7 is provided at one end of the bottom beam 5. The seeding adjustment mechanism 7 includes a counterweight frame 702, a frame sleeve 7021 on the counterweight frame 702, and the frame sleeve 7021 slides against the bottom beam 5. A longitudinally sliding counterweight block 705 is provided on the counterweight frame 702. With this structure, the weight of personnel or equipment can be adjusted by driving the seeding adjustment mechanism 7, thus maintaining the stability of the overall structure.

[0032] In the preferred embodiment, a horizontal cylinder 701 is provided at one end of the bottom beam 5. One end of the horizontal cylinder 701 is connected to the counterweight frame 702. The counterweight frame 702 is provided with multiple guide rods 704, and the counterweight block 705 is provided with multiple guide holes. The counterweight block 705 abuts against the guide holes. A transverse cylinder 703 is provided on one side of the counterweight frame 702 and is connected to the counterweight block 705. With this structure, driving the horizontal cylinder 701 causes the counterweight frame 702 to move horizontally, and driving the transverse cylinder 703 causes the counterweight block 705 to move laterally.

[0033] In the preferred embodiment, the bottom beam 5 is equipped with second winches 501 at both ends, and the second winches 501 are connected to the top beam 8. One end of the bottom beam 5 is equipped with a guardrail 9. With this structure, by driving multiple second winches 501, the bottom beam 5 can be raised and lowered relative to the top beam 8, so that the guardrail 9 can be raised and lowered relative to the vertical section 103.

[0034] Example 2: Further explanation in conjunction with Example 1: A method for inspecting an internal inspection device in a high vertical section of a water diversion channel, S1, Inspection preparation: Multiple cable car trolleys 2 are connected end to end and abut against the high horizontal section 101. V-shaped support 4 is connected to the cable car trolley 2 at one end, and the cable car trolley 2 at the other end is connected by a tractor. The V-shaped support 4 is closed. When the inspection device 3 is installed, the jack 403 is retracted and the winch 405 is wound up to close the V-shaped support 4.

[0035] S2. The detection device 3 moves to the high-angle curve section 102: the steel cable of the tractor is slowly released, and multiple tractor trolleys 2 slide to the high-angle curve section 102. The steel cable of the electric chain trolley 10 is slowly released so that the tractor trolleys 2 at the opposite ends of the V-shaped support 4 rotate until the inclined frame 402 abuts against the inner wall of the high-angle curve section 102. S3, V-shaped support 4 positioning: drive multiple winches 405 to make the bottom frame 401 rotate relative to the inclined frame 402, the V-shaped support 4 open, the bottom frame 401 horizontal, drive the jack 403 to make the jack 403 abut against the inner wall of the vertical section 103. S4. Staff in position: After passing through the closed fence 205 of multiple chain trucks 2, the staff enters the guardrail 9, and reaches the end of the vertical section 103 from the horizontal section 101 in the high zone. They adjust the breeding adjustment mechanism 7 to ensure the stability of the overall structure. S5, Vertical Section 103 Maintenance: Drive the slewing mechanism 6 to rotate the top beam 8 and bottom beam 5, and personnel perform circumferential maintenance on the vertical section 103. Drive the second winch 501 to raise and lower the bottom beam 5, and perform maintenance on the vertical section 103 from high to low.

[0036] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A maintenance device for the internal section of a high vertical section of a water diversion channel, characterized in that: It includes a flow channel (1), inside which is a detection device (3) and multiple cable carts (2), the multiple cable carts (2) are connected end to end, the detection device (3) includes a V-shaped support (4) that can be opened and closed, the cable carts (2) at the end are hinged to the V-shaped support (4), the bottom of the V-shaped support (4) is provided with a rotating top beam (8), the bottom of the top beam (8) is provided with a lifting bottom beam (5), and a rotary mechanism (6) is provided between the V-shaped support (4) and the top beam (8).

2. The internal maintenance device for the high vertical section of a water diversion channel according to claim 1, characterized in that: The flow channel (1) includes, from top to bottom, a high-zone horizontal section (101), a high-zone curved section (102), a vertical section (103), a low-zone curved section (104), and a low-zone horizontal section (105). An electric chain cart (10) is installed on the high-zone horizontal section (101). The electric chain cart (10) is connected to a V-shaped support (4). The connection section between the V-shaped support (4) and the electric chain cart (10) abuts against the inner wall of the high-zone curved section (102).

3. The internal maintenance device for the high vertical section of a water diversion channel according to claim 1, characterized in that: The cable carrier (2) includes a main beam (201), with multiple support arms (202) at the bottom of the main beam (201), multiple connecting brackets (204) on the main beam (201), a detachable enclosure (205) on the connecting bracket (204), a front hook (206) and a rear hook (207) at both ends of the main beam (201), and a hinge seat on the main beam (201).

4. The internal maintenance device for the high vertical section of a water diversion channel according to claim 3, characterized in that: The enclosed fence (205) includes two U-shaped connecting parts (2051), which are connected by a first bolt (2052). The support arm (202) is provided with multiple traveling wheels (203). The end of the beam (201) is provided with a notch, and a rotating shaft (2011) is provided on the notch. The front hook (206) is rotatably connected to the rotating shaft (2011).

5. The internal maintenance device for the high vertical section of a water diversion channel according to claim 1, characterized in that: The V-shaped support (4) includes a base frame (401), one end of which is provided with a jack (403), and the other end of which is rotatably connected to a hinge seat on the main beam (201). The base frame (401) is provided with a rotatably connected inclined frame (402), and multiple cable seats (404) are provided on the inclined frame (402). Multiple winches (405) are provided on the inclined frame (402), and the winches (405) are connected to the cable seats (404) by cables.

6. The internal maintenance device for the high vertical section of a water diversion channel according to claim 1, characterized in that: The rotary mechanism (6) includes a mounting frame (601), a rotary motor (602) is mounted on the mounting frame (601), a main gear (603) is mounted on the rotary motor (602), a meshing driven gear (604) is mounted on the main gear (603), a bottom sleeve (605) is mounted at the bottom of the driven gear (604), the bottom sleeve (605) is connected to the bottom beam (5), and the mounting frame (601) is connected to the bottom frame (401) of the V-shaped support (4).

7. The internal maintenance device for the high vertical section of a water diversion channel according to claim 1, characterized in that: The bottom beam (5) is provided with a breeding adjustment mechanism (7) at one end. The breeding adjustment mechanism (7) includes a counterweight frame (702), a frame sleeve (7021) on the counterweight frame (702), the frame sleeve (7021) slides against the bottom beam (5), and a longitudinally sliding counterweight block (705) is provided on the counterweight frame (702).

8. The internal maintenance device for the high vertical section of a water diversion channel according to claim 7, characterized in that: A horizontal cylinder (701) is provided at one end of the bottom beam (5). One end of the horizontal cylinder (701) is connected to the counterweight frame (702). Multiple guide rods (704) are provided on the counterweight frame (702). Multiple guide holes are provided on the counterweight block (705). The counterweight block (705) abuts against the guide holes. A transverse cylinder (703) is provided on one side of the counterweight frame (702). The transverse cylinder (703) is connected to the counterweight block (705).

9. The internal maintenance device for the high vertical section of a water diversion channel according to claim 1, characterized in that: The bottom beam (5) is equipped with a second winch (501) at both ends. The second winch (501) is connected to the top beam (8). The bottom beam (5) is equipped with a guardrail (9) at one end.

10. A maintenance method for an internal maintenance device of a high vertical section of a water diversion channel according to any one of claims 1 to 9, characterized in that: S1. Inspection preparation: Multiple cable car (2) are connected end to end and abut against the high zone horizontal section (101). The V-shaped support (4) is connected to the cable car (2) at the end. The cable car (2) at the other end is connected by a tractor. The V-shaped support (4) is closed. S2. The detection device (3) moves to the high-section curve section (102): the steel cable of the tractor is slowly released, and multiple tractor cars (2) slide to the high-section curve section (102). The steel cable of the electric chain car (10) is slowly released so that the tractor cars (2) at the opposite ends of the V-shaped support (4) rotate until the inclined frame (402) abuts against the inner wall of the high-section curve section (102). S3, V-shaped support (4) positioning: drive multiple winches (405) to make the bottom frame (401) rotate relative to the inclined frame (402), the V-shaped support (4) opens, the bottom frame (401) is horizontal, drive the jack (403) to make the jack (403) abut against the inner wall of the vertical section (103); S4. Staff in position: After passing through the closed fence (205) of multiple chain-driven vehicles (2), staff enter the guardrail (9), reach the end of the vertical section (103) from the horizontal section (101) in the high zone, and adjust the breeding adjustment mechanism (7) to ensure the stability of the overall structure. S5, Vertical section (103) maintenance: Drive the slewing mechanism (6) to make the top beam (8) and bottom beam (5) rotate, and personnel perform circumferential maintenance on the vertical section (103). Drive the second winch (501) to raise and lower the bottom beam (5) and perform maintenance on the vertical section (103) from high to low.

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