In-situ maintenance platform and method for radial gate hinge of hydropower station

Abstract

The water power station radial gate support hinge in-situ maintenance platform and method, including base frame, manned platform mechanism, lifting drive mechanism and platform opening and closing mechanism; the base frame is installed on the concrete base surface on both sides of the radial gate support hinge, the manned platform mechanism is hinged to the lower end of the sliding frame, the lifting drive mechanism is installed on the base frame and connected with the sliding frame, and the platform opening and closing mechanism is installed on the lower section of the sliding frame and drives the manned platform mechanism to open and close; the platform opening and closing mechanism drives the manned platform mechanism to rotate around the manned platform installation hinge seat of the sliding frame through the extension and retraction movement of the opening and closing electric push rod, and forms the construction platform for the maintenance personnel to work. The present application can be opened and closed and the height can be adjusted according to the actual support hinge condition on site, and can adapt to the maintenance operation requirements around the radial gate support hinge at different heights and different positions.

Description

Technical Field

[0001] This invention belongs to the field of high-altitude operation and maintenance platforms, and specifically relates to an in-situ maintenance platform and method for the hinge support of a hydropower station's arc gate. Background Technology

[0002] In water conservancy engineering, especially in hydropower stations, to ensure the safe operation of water-retaining structures and prevent dam overload events, flood discharge channels are installed at different elevations on the dam body. These channels, along with arched gates, discharge and impound river water from the reservoir area, controlling the upstream water level at a reasonable and safe height to ensure the safe operation of the water conservancy system. The arched gates are effectively connected to the dam body via hinges. Therefore, the safe operation of the arched gates and their hinges directly affects the safe operation of the hydropower station. Operation and maintenance units typically conduct annual routine inspections and maintenance on all four sides of the arched gate hinge metal structure according to relevant operating specifications to ensure the structural safety and stable operation of the arched gates. Thus, the maintenance of the arched gate hinges is particularly important.

[0003] However, since the arc-shaped gate hinge is fixedly installed at the upper part of the outlet of the flood discharge channel of the dam body and embedded in a suspended position, and the area below its installation position is an inclined channel, it is impossible to set up conventional scaffolding to carry out maintenance work. There is a concrete base above that obstructs the view, making it impossible to directly hoist conventional tools from top to bottom for maintenance work. At the same time, the risk and difficulty of working in the suspended position at the bottom of the arc-shaped gate hinge is even greater. How to carry out on-site maintenance work on the metal structure of the arc-shaped gate hinge in an efficient, convenient and safe manner is an urgent problem to be solved by operation and maintenance management personnel.

[0004] Based on the actual site conditions, the metal structure of the arched gate hinges generally requires annual routine inspection and maintenance on four sides: the top surface, the two side facades, and the bottom. For the top surface of this type of equipment, personnel can directly access it for work; for the two side facades and the bottom, it is necessary to construct suspended scaffolding from top to bottom at the hinge position or use a hoisting work platform to carry out the work. However, this method has the following drawbacks: 1. Scaffolding-type work platforms have low work efficiency. Scaffolding is time-consuming to erect, especially this kind of special scaffolding that is erected from top to bottom. Every time materials are transferred and passed, measures must be taken to prevent them from falling, which takes up a lot of working time and results in low work efficiency. 2. The risks are relatively high. The work area for the erection personnel is located near the edge and in the air, and there is a risk of personnel falling from a height, resulting in a high level of operational safety risks. 3. Lifting platforms are suitable for operations with small-to-high-rise spans. However, for hydropower stations with high dam structures, where the flood discharge facilities are installed about 100m from the dam crest, lifting platforms pose risks such as swaying, shaking, and uncontrollable operation. Summary of the Invention The technical problem to be solved by the present invention is to provide an in-situ maintenance platform and method for the hinges of the arc gate of a hydropower station. The working platform has a simple structure and a high degree of integration. It can be opened and closed and its height can be adjusted according to the actual hinge conditions on site, and can meet the maintenance needs of the hinges of the arc gate at different heights and in different locations.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The in-situ maintenance platform for the arched gate hinge of a hydropower station includes a foundation frame, a personnel platform mechanism, a lifting drive mechanism, and a platform opening and closing mechanism. The foundation frame is installed on the concrete base on both sides of the arched gate hinge. The personnel platform mechanism is hinged to the lower end of the sliding frame. The lifting drive mechanism is installed on the foundation frame and connected to the sliding frame. The platform opening and closing mechanism is installed on the lower section of the sliding frame and drives the personnel platform mechanism to open and close. The platform opening and closing mechanism drives the personnel platform mechanism to rotate around the personnel platform mounting hinge seat of the sliding frame through the telescopic movement of the opening and closing electric push rod, forming a construction platform for maintenance personnel to work on.

[0006] As a preferred embodiment, the base frame is composed of two side rails connected by multiple equidistant mounting plates. The inner sides of the side rails are provided with U-shaped grooves facing each other, and anti-slip pin holes are evenly distributed on the front side. The lower outer side is provided with a groove to avoid the mounting rod of the opening and closing mechanism, and the lower outer side of the base frame is provided with an anti-detachment safety plate.

[0007] As a preferred embodiment, the sliding frame includes a sliding plate, with a set of mounting lugs on the top of the sliding plate, a hinge seat on each side of the upper front part, support rails on the front and rear parts of the left and right sides, a manned platform mounting hinge seat at the bottom of the sliding frame, and anti-slip holes on both sides of the sliding frame. The sliding frame can be restricted to the suspended position of the base frame by means of pins.

[0008] As a preferred embodiment, the manned platform mechanism includes a manned platform, an extension platform, a tie rod mechanism, and a fence mechanism; the manned platform is provided with a hidden mounting groove for the extension platform on the hinge side, a limit stop is provided on the end face, and extension platform sliding grooves are provided on the left and right positions of the upper surface; the manned platform is connected to the manned platform mounting hinge seat through a pin, and a manned platform mounting hinge is provided at one end of the upper surface of the manned platform, and a first connecting pin mounting hole is opened in the middle.

[0009] As a preferred embodiment, the lifting drive mechanism includes an electric actuator, a wire rope, and a pulley; the electric cylinder of the electric actuator is mounted on the lifting drive mechanism mounting rod of the base frame, one end of the wire rope is connected to the telescopic rod of the electric actuator, and the other end is connected to the mounting lug of the sliding frame, and the pulley is mounted on the wire rope pulley mounting rod of the base frame.

[0010] As a preferred embodiment, the platform opening and closing mechanism includes an opening and closing electric actuator and a mounting bearing; the opening and closing electric cylinder of the opening and closing electric actuator is mounted on the platform opening and closing mechanism drive head mounting rod of the sliding frame, and the opening and closing telescopic rod is mounted on the platform opening and closing mechanism connecting mounting rod of the manned platform through the mounting bearing.

[0011] As a preferred embodiment, the pull rod mechanism includes an upper pull rod, a lower pull rod, a guide rod, a first connecting shaft, and a first locking nut; the upper pull rod and the lower pull rod are installed in the guide groove of the guide rod through the first connecting shaft and can slide inside it; the lower end of the lower pull rod of the pull rod mechanism is connected to the pull rod and fence mounting hinge of the manned platform through a pin, and the upper end of the upper pull rod of the pull rod mechanism is connected to the hinge seat of the sliding frame through a pin.

[0012] As a preferred embodiment, the fence mechanism consists of fence panels, connecting rods, a second connecting shaft, and a second locking nut; the fence panels and connecting rods are connected via the second connecting shaft and locked by the second locking nut; the lower end of the fence panels is connected to the pull rod of the manned platform and the fence mounting hinge via a pin, and the upper end of the connecting rod is connected to the hinge seat of the sliding frame via a pin, thereby achieving a reliable connection between the fence mechanism and the manned platform.

[0013] As a preferred embodiment, the expansion platform is embedded in the hidden mounting slot of the manned platform, and an operation drive block is provided on the upper part, which works in conjunction with the expansion platform slide to push the expansion platform to slide and unfold on the manned platform.

[0014] As a preferred embodiment, the end face limiting block of the manned platform cooperates with the limiting block clearance groove of the extension platform to prevent the extension platform from moving beyond the limit; the second connecting pin mounting hole on the upper surface of the manned platform is connected to the first connecting hole at the lower end of the pull rod of the tie rod mechanism through a connecting shaft to achieve a reliable connection between the tie rod mechanism and the manned platform.

[0015] The method for using the in-situ maintenance platform for the hinge support of the arc gate of a hydropower station includes the following steps: S1. Maintenance platform installation: Fix the base frame to the concrete base surface on both sides of the arc gate hinge through the mounting holes of the mounting plate. Align the anti-slip pin holes evenly distributed on the front of the base frame with the anti-slip holes on both sides of the sliding frame. Insert pins into the anti-slip pin holes and anti-slip holes to achieve the initial suspension and locking position of the sliding frame on the base frame. Then install the anti-detachment safety plate to ensure that the anti-detachment safety plate can move safely between the hinge seat of the sliding frame and the mounting hinge seat of the manned platform. S2. The manned platform is deployed, and the opening and closing electric actuator of the platform opening and closing mechanism is activated. The opening and closing telescopic rod of the electric actuator pushes the platform opening and closing mechanism connecting rod of the manned platform, so that the manned platform mechanism rotates around the manned platform mounting hinge of the sliding frame to a horizontal position, forming a horizontal construction platform. S3. Platform height adjustment: Activate the electric actuator of the lifting drive mechanism. The telescopic rod of the electric actuator pulls the wire rope. The wire rope is guided by the wire rope pulley of the foundation frame, which drives the sliding frame to move up and down along the U-shaped slide groove of the side rail. The height of the upper surface of the manned platform can be dynamically adjusted to be level with the maintenance working surface of the arc gate hinge. After adjustment, the locking pin is inserted to prevent the manned platform from sliding. S4. The extension platform is deployed. The operation drive block of the extension platform is operated to push the extension platform to slide along the extension platform slide groove of the manned platform towards the bottom of the hinge. The limit stop groove of the extension platform cooperates with the limit stop of the manned platform to prevent the extension platform from moving beyond the limit, thus realizing a full-coverage working platform in the bottom area of ​​the hinge. S5. The maintenance platform is retrieved. After the maintenance work is completed, the unit is retrieved and locked. (1) The expansion platform is lowered and retracted into the manned platform; (2) Release the pin lock, start the electric push rod of the lifting drive mechanism to move in the opposite direction, the electric cylinder of the electric push rod drives the wire rope to retract, so that the sliding frame moves upward along the U-shaped slide to the initial hovering position, and inserts the locking pin to prevent the device from sliding down. (3) Personnel evacuate the manned platform; (4) Start the opening and closing mechanism of the platform and retract the electric push rod in the opposite direction, so that the manned platform mechanism rotates around the manned platform mounting hinge and returns to the position of fitting the base frame.

[0016] In step S3, when the sliding frame moves along the U-shaped groove, the front and rear base surfaces of the U-shaped groove of the supporting slide rail and the side rail cooperate to reduce contact friction and ensure smooth movement.

[0017] In step S4, the limiting block clearance groove of the extension platform cooperates with the limiting block of the manned platform, so that the extension platform is automatically limited when it slides to the bottom of the hinge, thus preventing the platform from exceeding the safety boundary.

[0018] In steps S2, S3, and S5, the electric actuators of the platform opening and closing mechanism and the lifting drive mechanism adopt single-step control logic to ensure that the platform retraction and height reset actions are performed in a single operation.

[0019] In step S1, the mounting plate of the foundation frame is fixed to the concrete base surface with bolts, and the mounting holes are evenly distributed to ensure that the horizontal error of the foundation frame is ≤5mm.

[0020] The present invention can achieve the following beneficial effects: 1. This platform is installed on the concrete base on both sides of the arc gate hinge. During routine inspection or maintenance of the arc gate hinge, the platform can be unfolded to form a work platform for maintenance personnel. The support height of the platform can be adjusted and controlled according to different elevation requirements to achieve effective inspection of the two sides of the arc gate hinge. A connecting platform can also be erected between two maintenance platforms to achieve effective inspection of the bottom area of ​​the hinge, thus ensuring the smooth completion of the full-coverage maintenance task of the arc gate hinge. When not in use, it can be completely recycled to the fixed frame without affecting the normal flood discharge function of the facility during the flood discharge period. At the same time, for the convenience and safety of the staff, the maintenance platform is designed as a modular structure. The components are assembled using a linkage drive method. The platform has a simple structure and a high degree of integration. It can be opened, closed and height adjusted according to the actual hinge conditions on site, and can adapt to the maintenance needs of the arc gate hinge at different heights and locations.

[0021] 2. Based on the actual working conditions at the site, this invention provides an in-situ maintenance platform for the hinge support of the arc gate in hydropower stations. It provides a safe and reliable manned solution for on-site maintenance of the hinge support of the arc gate, improves work efficiency, avoids high-risk working environments for workers, reduces the labor intensity of workers, and ensures the safety of flood discharge facility maintenance and construction operations.

[0022] 3. The work platform has a safe and reliable structure, is easy to operate, improves labor efficiency, and is low in cost. This device is used for maintenance work on the air-facing surface, suspended surface, and bottom of equipment. It can also be moved freely as needed, has a wide range of applications, and is highly versatile. This platform is reusable and has broad application prospects. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the fixing frame structure of the present invention; Figure 2 This is a schematic diagram of the sliding frame structure of the present invention; Figure 3 This is a schematic diagram of the manned platform structure of the present invention; Figure 4 This is a schematic diagram of the extended platform structure of the present invention; Figure 5 This is an exploded view of the tie rod mechanism structure of the present invention; Figure 6 This is a schematic diagram of the tie rod mechanism of the present invention; Figure 7 This is a schematic diagram of the fence mechanism structure of the present invention; Figure 8 This is a schematic diagram of the lifting drive mechanism of the present invention; Figure 9 This is a schematic diagram of the in-situ maintenance platform (unfolded) for the arc-shaped gate hinge of a hydropower station according to the present invention. Figure 10 This is a schematic diagram of the in-situ maintenance platform (retractable) for the arc-shaped gate hinge of a hydropower station according to the present invention. Figure 11 This is a schematic diagram of the extended platform (unfolded) structure of the in-situ maintenance platform for the arc gate hinge of the hydropower station according to the present invention; Figure 12. Application diagram of in-situ maintenance platform for the hinge support of the arc gate of a hydropower station; Figure 13 Enlarged view of the application location of the in-situ maintenance platform for the arched gate hinge of the hydropower station.

[0024] In the diagram: 0 Dam; 01 Flood discharge channel; 02 Arc gate; 02-1 Water-facing side of arc gate; 02-2 Arc gate support arm; 02-3 Arc gate hinge; 03 Gantry crane; 1 Fixed frame; 2 Sliding frame; 3 Manned platform mechanism; 4 Extending platform; 5 Tie rod mechanism; 50 Upper tie rod; 51 Lower tie rod; 52 Guide rod; 53 Connecting shaft; 54 Locking nut; 6 Fence mechanism; 60 Fence panel; 61 Connecting rod; 7 Lifting drive mechanism; 70 Electric actuator; 71 Wire rope; 72 Pulley; 80 Opening and closing electric actuator. Detailed Implementation

[0025] Preferred solutions include Figure 10-13 As shown, the in-situ maintenance platform for the arc gate hinge of the hydropower station consists of four parts: a fixed frame, a manned platform mechanism, a lifting drive mechanism, and a platform opening and closing mechanism.

[0026] The fixed frame, which is the main basic installation functional component of this invention, is installed at the corresponding position on the dam according to the hinge position to be inspected. It can provide safe and reliable installation and lifting support for the manned platform mechanism. The lifting drive mechanism and the platform opening and closing mechanism realize effective control of the manned platform mechanism, ensuring that the manned platform mechanism can reach the position elevation area of ​​the arch hinge that needs to be inspected as needed, and ensuring the normal progress of hinge inspection work. It mainly consists of a fixed frame and a sliding frame.

[0027] The manned platform mechanism, the main manned device of this invention, is hinged and installed at the lower end of the sliding frame. It opens and closes under the drive of the platform opening and closing mechanism. Its opening and closing angle can be adjusted according to the actual site conditions to ensure that the platform is in a horizontal position after being unfolded. An extension platform can be installed between the two platforms to provide a safe and reliable maintenance platform for workers to carry out maintenance work at the bottom of the hinge, ensuring the effective implementation of maintenance work. It mainly consists of the manned platform mechanism, the extension platform, the tie rod, and the fence.

[0028] The lifting drive mechanism is the main functional component for lifting control of the device of the present invention. The main body is installed on the fixed frame and connected to the sliding frame through a steel wire rope, thereby realizing the reliable movement of the sliding frame within the fixed frame. This ensures that the operators can effectively access different elevations in the side area of ​​the arc gate hinge, ensuring the smooth progress of maintenance work. It mainly consists of a drive device, steel wire rope and pulley.

[0029] The platform opening and closing mechanism is mounted on the lower section of the sliding frame via a hinge, with the other end of the drive rod mounted on the side of the manned platform mechanism at an adapter position. The platform opening and closing operation is achieved through an external power supply control device, ensuring that the platform can be quickly opened when in use and quickly retracted when not in use.

[0030] The components required for this invention are as follows: Fixture 1, such as Figure 1 As shown, this is a custom component consisting of two side rails 10 connected by multiple equidistant mounting plates 11. The inner sides of the side rails 10 have U-shaped grooves 10-1 facing each other, and anti-slip pin holes 10-2 are evenly distributed on the front. The lower outer section has an opening / closing mechanism mounting rod clearance groove 10-3. Mounting holes 11-1 are evenly distributed on the mounting plates 11 to facilitate the installation of the fixing frame 1 on the foundation surface. A wire rope pulley mounting rod 12 is installed at the upper end between the inner sides of the two side rails 10, and a lifting drive mechanism mounting rod 13 is installed at the lower section. Anti-detachment safety plates 14 are installed at appropriate positions on the lower front section of the two side rails 10.

[0031] Sliding bracket 2, such as Figure 2 As shown, it is a plate structure with two sets of mounting lugs 21 on the top. The lugs 21 have wire rope mounting holes 21-1. There is a hinge seat 22 on each side of the upper front part. The hinge seat 22 has mounting holes 22-1 for tie rods and fence connecting shafts. Support rails 23 are provided on the front and rear parts of the left and right sides. They can be used with the front and rear base surfaces of the side rail U-shaped slide groove 10-1 of the fixed frame to reduce the contact friction with the U-shaped slide groove 10-1 and achieve smooth sliding inside it. Anti-slip holes 20-1 are provided on both sides of the sliding frame 2. The sliding frame 2 can be restricted to the suspended position of the fixed frame 1 by pins to ensure the safety of the platform device. The bottom of the sliding frame 2 is provided with a manned platform mechanism mounting hinge seat 24, which has a platform mounting hole 24-1. The lower outer side of the sliding frame 2 is provided with a platform opening and closing mechanism drive head mounting rod 25.

[0032] Manned platform organization 3, such as Figure 3As shown, the main manned functional component of the present invention is a plate structure. A hidden mounting groove 30-1 for the extension platform is provided on the hinge side, and a limit stop 30-2 is provided at a suitable position on the end face. Extension platform sliding grooves 30-3 are provided on the left and right sides of the upper surface. A platform opening and closing mechanism connecting rod 31 is provided on the opposite side of the hidden mounting groove 30-1 of the manned platform mechanism 3. A manned platform mechanism mounting hinge 32 is provided at one end of the upper surface of the manned platform mechanism 3, with a first connecting pin mounting hole 32-1 in the middle. A pin can pass through the connecting pin mounting hole 32-1 and the platform mounting hole 24-1 to reliably connect the manned platform mechanism 3 to the manned platform mechanism mounting hinge seat 24. A tie rod and fence mounting hinge seat 33 is provided at the other end of the upper surface of the manned platform mechanism 3, with a second connecting pin mounting hole 33-1 in the middle, enabling a reliable connection between the manned platform mechanism 3 and the tie rod 5 and fence 6, ensuring the safe use of the manned platform mechanism.

[0033] Expand platform 4, such as Figure 4 As shown, the overall structure is a plate type, embedded in the manned platform mechanism 3. It can be extended and pushed out according to the needs of on-site use, and can be effectively connected with another device to form a working platform at the bottom of the hinge, ensuring the safety of maintenance in the area at the bottom of the hinge. The main body has a limit block avoidance groove 40-1, which can be used in conjunction with the limit block 30-2 of the manned platform mechanism 3 to prevent the extension platform 4 from moving beyond the limit and ensure the safety of platform use. An operation drive block 41 is installed on the upper part of the extension platform, which is used in conjunction with the extension platform slide 30-3, allowing the operator to operate the extension platform according to maintenance needs.

[0034] Pull rod mechanism 5, such as Figure 5 , Figure 6 As shown, the manned platform mechanism 3 is installed on both sides. Each side consists of two rod-shaped structures: an upper pull rod 50, a lower pull rod 51, a guide rod 52, a first connecting shaft 53-1, and a first locking nut 54-1. Specifically, the upper pull rod 50 has a first mounting hole 50-1 and a first connecting hole 50-2, and the lower pull rod 51 has a second mounting hole 51-1 and a second connecting hole 51-2. The guide rod 52 is provided with a mounting rod 52-1 and a guide groove 52-2. The upper pull rod 50 and the lower pull rod 51 are installed in the guide groove 52-2 through the first connecting shaft 53-1 and can slide inside it, realizing the directional movement of the upper pull rod 50 and the lower pull rod 51 during the retraction process. Under the action of the platform opening and closing mechanism 8, the pull rod mechanism 5 can effectively open and retract, thereby ensuring that the manned platform mechanism 3 is effectively pulled on the sliding frame 2 after opening, ensuring the safety of the device.

[0035] Fence mechanism 6, such as Figure 7As shown, the fence mechanism 6 consists of a fence plate 60, a connecting rod 61, a second connecting shaft 53-2, and a second locking nut 54-2. Specifically, the fence plate 60 and the connecting rod 61 are connected by the second connecting shaft 53-2 and locked by the second locking nut 54-2, allowing the fence plate to rotate around the shaft. The lower end of the fence plate 60 is provided with a fence plate mounting hole 60-1, which can be installed on the pull rod and the fence mounting hinge seat 33. The upper end of the connecting rod 61 is provided with a connecting rod mounting hole 61-1, which can be installed on the hinge seat 22. Under the action of the platform opening and closing mechanism 8, the fence mechanism 6 can effectively open and retract.

[0036] Lifting drive mechanism 7, such as Figure 8 As shown, the device is installed on both sides of the fixed frame 1 and the sliding frame 1. The single-side device mainly consists of an electric actuator 70, a wire rope 71, and a pulley 72. Specifically, the electric cylinder 70-1 of the electric actuator 70 is installed on the lifting drive mechanism mounting rod 13 of the fixed frame 1. One end of the wire rope 71 is connected to the telescopic rod 70-2 of the electric actuator 70, and the other end of the wire rope 71 is connected to the mounting lug 21 of the sliding frame 2. The pulley 72 is installed on the wire rope pulley mounting rod 12 of the fixed frame 1, and the mounting shaft 73 is installed on the mounting lug 21 of the sliding frame 2. The mechanism drives the wire rope 71 to move up and down through the telescopic movement of the electric actuator 70, thereby realizing the up and down movement of the sliding frame 2 within the fixed frame 1, providing a reliable working platform for the safe maintenance of the two sides of the arched door hinge and the bottom area.

[0037] Platform opening and closing mechanism 8, such as Figure 9 , Figure 10 As shown, the platform is installed on the outside of the fixed frame 1 and the sliding frame 1. The opening and closing function of the platform is mainly realized by the opening and closing electric push rod 80. Specifically, the opening and closing electric cylinder 80-1 is installed on the platform opening and closing mechanism drive head mounting rod 25 of the sliding frame 2. The opening and closing telescopic rod 80-2 is installed on the platform opening and closing mechanism connecting mounting rod 31 of the manned platform mechanism 3 through the mounting bearing 81. The mechanism realizes the rotation of the manned platform mechanism 3 around the manned platform mechanism mounting hinge seat 24 of the sliding frame 2 through the telescopic movement of the opening and closing electric push rod 80, thereby achieving the effective opening and closing movement of the manned platform mechanism.

[0038] The method for using the in-situ maintenance platform for the hinge support of the arc gate of a hydropower station includes the following steps: S1. Maintenance platform installation: Fix the base frame 1 to the concrete base surface on both sides of the arc gate hinge through the mounting holes 11-1 of the mounting plate 11. Align the anti-slip pin holes 10-2 evenly distributed on the front of the base frame 1 with the anti-slip holes 20-1 on both sides of the sliding frame 2. Insert pins into the anti-slip pin holes 10-2 and anti-slip holes 20-1 to achieve the initial suspension and locking position of the sliding frame 2 on the base frame 1. Then install the anti-detachment safety plate 14 to ensure that the anti-detachment safety plate 14 can move safely between the hinge seat 22 of the sliding frame 2 and the manned platform mounting hinge seat 24. S2. The manned platform is deployed, and the opening and closing electric push rod 80 of the platform opening and closing mechanism 8 is activated. The opening and closing telescopic rod 80-2 of the opening and closing electric push rod 80 pushes the platform opening and closing mechanism connecting installation rod 31 of the manned platform 30, so that the manned platform mechanism 3 rotates around the manned platform mounting hinge seat 24 of the sliding frame 2 to a horizontal position, forming a horizontal construction platform. S3. Platform height adjustment: Activate the electric push rod 70 of the lifting drive mechanism 7. The telescopic rod 70-2 of the electric push rod 70 pulls the wire rope 71. The wire rope 71 is guided by the wire rope pulley 72 of the foundation frame 1, which drives the sliding frame 2 to move up and down along the U-shaped slide groove 10-1 of the side rail 10. The height of the upper surface of the manned platform 30 and the maintenance working surface of the arc gate hinge can be dynamically adjusted. After adjustment, the locking pin is inserted to prevent the manned platform 30 from sliding. S4. The extension platform is deployed. The operation drive block 41 of the extension platform 4 is operated to push the extension platform 4 to slide along the extension platform slide groove 30-3 of the manned platform 30 towards the bottom of the hinge. The limit block clearance groove 40-1 of the extension platform 4 cooperates with the limit block 30-2 of the manned platform 30 to prevent the extension platform 4 from moving beyond the limit, thus realizing a full-coverage working platform in the bottom area of ​​the hinge. S5. The maintenance platform is retrieved. After the maintenance work is completed, the unit is retrieved and locked. (1) The expansion platform 4 is lowered and retracted into the manned platform 30; (2) Release the pin lock, start the electric push rod 70 of the lifting drive mechanism 7 to move in the reverse direction, the electric cylinder 70-1 of the electric push rod 70 drives the wire rope 71 to retract, so that the sliding frame 2 moves upward along the U-shaped slide groove 10-1 to the initial hovering position, and insert the locking pin to prevent the device from sliding down. (3) Personnel evacuate the manned platform; (4) Start the opening and closing mechanism 8 of the platform and retract the electric push rod 80 in the opposite direction, so that the manned platform mechanism 3 rotates around the manned platform mounting hinge 24 and returns to the position of fitting the base frame 1.

[0039] In step S3, when the sliding frame 2 moves along the U-shaped slide groove 10-1, the supporting slide rail 23 cooperates with the front and rear base surfaces of the U-shaped slide groove 10-1 of the side rail 10 to reduce contact friction and ensure smooth movement.

[0040] In step S4, the limiting block clearance groove 40-1 of the extension platform 4 cooperates with the limiting block 30-2 of the manned platform 30, so that the extension platform 4 is automatically limited when it slides to the bottom of the hinge, thus preventing the platform from exceeding the safety boundary.

[0041] In steps S2, S3, and S5, the opening and closing electric push rod 80 of the platform opening and closing mechanism 8 and the electric push rod 70 of the lifting drive mechanism 7 adopt single-step control logic to ensure that the platform retraction and height reset actions are performed in a single operation.

[0042] In step S1, the mounting plate 11 of the foundation frame 1 is fixed to the concrete base surface by bolts, and the mounting holes 11-1 are evenly distributed to ensure that the horizontal error of the foundation frame 1 is ≤5mm.

[0043] 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 platform for the hinge support of an arc-shaped gate in a hydropower station, characterized in that, It includes a base frame (1), a manned platform mechanism (3), a lifting drive mechanism (7), and a platform opening and closing mechanism (8); the base frame (1) is installed on the concrete base surface on both sides of the arc gate hinge, the manned platform mechanism (3) is hinged to the lower end of the sliding frame (2), the lifting drive mechanism (7) is installed on the base frame (1) and connected to the sliding frame (2), and the platform opening and closing mechanism (8) is installed on the lower section of the sliding frame (2) and drives the manned platform mechanism (3) to open and close; the platform opening and closing mechanism (8) drives the manned platform mechanism (3) to rotate around the manned platform mounting hinge seat (24) of the sliding frame (2) through the telescopic movement of the opening and closing electric push rod (80), forming a construction platform for maintenance personnel to work.

2. The in-situ maintenance platform for the hinge support of the arc-shaped gate of a hydropower station according to claim 1, characterized in that: The base frame (1) is formed by two side rails (10) connected by multiple equidistant mounting plates (11). The side rails (10) have U-shaped grooves (10-1) on their inner sides facing each other, and anti-slip pin holes (10-2) are evenly distributed on the front side. The lower outer side has a groove (10-3) to avoid the mounting rod of the opening and closing mechanism. The lower outer side of the base frame (1) has an anti-detachment safety plate (14).

3. The in-situ maintenance platform for the hinged support of the arc-shaped gate of a hydropower station according to claim 1, characterized in that: The sliding frame (2) includes a sliding plate (20). The top of the sliding plate (20) is provided with two sets of mounting lugs (21). The upper front part is provided with one hinge seat (22) on each side. The front and rear parts on the left and right sides are provided with support rails (23). The bottom of the sliding frame (2) is provided with a manned platform mounting hinge seat (24). Anti-slip holes (20-1) are provided on both sides of the sliding frame (2). The sliding frame (2) can be restricted to the suspended position of the base frame (1) by means of pins.

4. The in-situ maintenance platform for the hinged support of the arc-shaped gate of a hydropower station according to claim 1, characterized in that: The manned platform mechanism (3) includes a manned platform (30), an extension platform (4), a tie rod mechanism (5), and a fence mechanism (6); the manned platform (30) is provided with a hidden installation groove (30-1) for the extension platform on the hinge side, a limit stop (30-2) is provided on the end face, and an extension platform slide groove (30-3) is provided on the left and right sides of the upper surface; the manned platform (30) is connected to the manned platform mounting hinge seat (24) through a pin, and a manned platform mounting hinge (32) is provided at one end of the upper surface of the manned platform (30), and a first connecting pin mounting hole (32-1) is opened in the middle.

5. The in-situ maintenance platform for the hinge support of the arc-shaped gate of a hydropower station according to claim 1, characterized in that: The lifting drive mechanism (7) includes an electric push rod (70), a wire rope (71) and a pulley (72); the electric cylinder (70-1) of the electric push rod (70) is installed on the lifting drive mechanism mounting rod (13) of the base frame (1), one end of the wire rope (71) is connected to the telescopic rod (70-2) of the electric push rod (70), and the other end is connected to the mounting lug (21) of the sliding frame (2), and the pulley (72) is installed on the wire rope pulley mounting rod (12) of the base frame (1).

6. The in-situ maintenance platform for the hinge of the arc-shaped gate of a hydropower station according to claim 1, characterized in that: The platform opening and closing mechanism (8) includes an opening and closing electric push rod (80) and a mounting bearing (81); the opening and closing electric cylinder (80-1) of the opening and closing electric push rod (80) is mounted on the platform opening and closing mechanism drive head mounting rod (25) of the sliding frame (2), and the opening and closing telescopic rod (80-2) is mounted on the platform opening and closing mechanism connecting mounting rod (31) of the manned platform (30) through the mounting bearing (81).

7. The in-situ maintenance platform for the hinged support of the arc-shaped gate of a hydropower station according to claim 4, characterized in that: The lever mechanism (5) includes an upper lever (50), a lower lever (51), a guide rod (52), a first connecting shaft (53-1), and a first locking nut (54-1). The upper lever (50) and the lower lever (51) are installed in the guide groove (52-2) of the guide rod (52) through the first connecting shaft (53-1) and can slide inside it. The lower end of the lower lever (51) of the lever mechanism (5) is connected to the lever and fence mounting hinge (33) of the manned platform (30) through a pin, and the upper end of the upper lever (50) of the lever mechanism (5) is connected to the hinge seat (22) of the sliding frame (2) through a pin.

8. The in-situ maintenance platform for the hinged support of the arc-shaped gate of a hydropower station according to claim 4, characterized in that: The fence mechanism (6) consists of a fence panel (60), a connecting rod (61), a second connecting shaft (53-2), and a second locking nut (54-2). The fence panel (60) and the connecting rod (61) are connected by the second connecting shaft (53) and locked by the second locking nut (54). The lower end of the fence panel (60) of the fence mechanism (6) is connected to the pull rod of the manned platform (30) and the fence mounting hinge (33) by a pin. The upper end of the connecting rod (61) of the fence mechanism (6) is connected to the hinge seat (22) of the sliding frame (2) by a pin, so as to realize the reliable connection between the fence mechanism (6) and the manned platform (30).

9. The in-situ maintenance platform for the hinge support of the arc-shaped gate of a hydropower station according to claim 4, characterized in that: The expansion platform (4) is embedded in the expansion platform hidden mounting slot (30-1) of the manned platform (30). An operation drive block (41) is provided on the upper part, which works in conjunction with the expansion platform slide (30-3) to push the expansion platform (4) to slide and unfold on the manned platform (30).

10. The in-situ maintenance platform for the hinge support of the arc-shaped gate of a hydropower station according to claim 4, characterized in that: The end face limit stop (30-2) of the manned platform (30) cooperates with the limit stop clearance groove (40-1) of the extension platform (4) to prevent the extension platform (4) from moving beyond the limit; the second connecting pin mounting hole (33-1) on the upper surface of the manned platform (30) is connected to the first connecting hole (51-1) at the lower end of the pull rod (51) of the pull rod mechanism (5) through the connecting shaft to realize the reliable connection between the pull rod mechanism (5) and the manned platform (30).

11. The method of using the in-situ maintenance platform for the hinge support of the arc-shaped gate of a hydropower station according to claim 1, characterized in that, Includes the following steps: S1. Maintenance platform installation: Fix the base frame (1) to the concrete base surface on both sides of the arc gate hinge through the mounting holes (11-1) of the mounting plate (11), so that the anti-slip pin holes (10-2) are evenly distributed on the front of the base frame (1) and aligned with the anti-slip holes (20-1) on both sides of the sliding frame (2). Insert the pins into the anti-slip pin holes (10-2) and anti-slip holes (20-1) to achieve the initial suspension and locking position of the sliding frame (2) on the base frame (1). Then install the anti-detachment safety plate (14) to ensure that the anti-detachment safety plate (14) can move safely between the hinge seat (22) of the sliding frame (2) and the manned platform mounting hinge seat (24). S2. The manned platform is deployed, and the opening and closing electric push rod (80) of the platform opening and closing mechanism (8) is activated. The opening and closing telescopic rod (80-2) of the opening and closing electric push rod (80) pushes the platform opening and closing mechanism connecting rod (31) of the manned platform (30) to rotate the manned platform mechanism (3) around the manned platform mounting hinge seat (24) of the sliding frame (2) to a horizontal position, forming a horizontal construction platform; S3. Adjust the platform height, start the electric push rod (70) of the lifting drive mechanism (7), the telescopic rod (70-2) of the electric push rod (70) pulls the wire rope (71), the wire rope (71) is guided by the wire rope pulley (72) of the foundation frame (1), and drives the sliding frame (2) to move up and down along the U-shaped slide groove (10-1) of the side rail (10). The height of the upper surface of the manned platform (30) and the maintenance working surface of the arc gate hinge can be dynamically adjusted. After the adjustment is in place, the locking pin is inserted to prevent the manned platform (30) from sliding. S4. The extension platform is deployed. The operation drive block (41) of the extension platform (4) is operated to push the extension platform (4) to slide along the extension platform slide groove (30-3) of the manned platform (30) towards the bottom of the hinge. The limit block clearance groove (40-1) of the extension platform (4) cooperates with the limit block (30-2) of the manned platform (30) to prevent the extension platform (4) from moving beyond the limit and realize the full coverage operation platform of the bottom area of ​​the hinge. S5. The maintenance platform is retrieved. After the maintenance work is completed, the unit is retrieved and locked. (1) The expansion platform (4) is lowered and retracted into the manned platform (30); (2) Release the pin lock, start the electric push rod (70) of the lifting drive mechanism (7) to move in the opposite direction, the electric cylinder (70-1) of the electric push rod (70) drives the wire rope (71) to retract, so that the sliding frame (2) moves upward along the U-shaped slide groove (10-1) to the initial hovering position, and insert the locking pin to prevent the device from sliding down. (3) Personnel evacuate the manned platform; (4) Start the opening and closing mechanism (8) of the platform opening and closing mechanism (8) and retract the electric push rod (80) in the opposite direction, so that the manned platform mechanism (3) rotates around the manned platform mounting hinge (24) and returns to the position of fitting the base frame (1).

12. The method of using the in-situ maintenance platform for the hinge support of the arc-shaped gate of a hydropower station according to claim 11, characterized in that: In step S3, when the sliding frame (2) moves along the U-shaped groove (10-1), the front and rear base surfaces of the U-shaped groove (10-1) of the support rail (23) and the side rail (10) cooperate to reduce contact friction and ensure smooth movement.

13. The method of using the in-situ maintenance platform for the hinge of the arc-shaped gate of a hydropower station according to claim 11, characterized in that: In step S4, the limiting block clearance groove (40-1) of the extension platform (4) cooperates with the limiting block (30-2) of the manned platform (30) so that the extension platform (4) is automatically limited when it slides to the bottom of the hinge, thus preventing the platform from exceeding the safety boundary.

14. The method of using the in-situ maintenance platform for the hinge support of the hydropower station's arc-shaped gate according to claim 11, characterized in that: In steps S2, S3, and S5, the opening and closing electric push rod (80) of the platform opening and closing mechanism (8) and the electric push rod (70) of the lifting drive mechanism (7) adopt single-step control logic to ensure that the platform retraction and height reset actions are performed in a single operation.

15. The method of using the in-situ maintenance platform for the hinge of the arc-shaped gate of a hydropower station according to claim 11, characterized in that: In step S1, the mounting plate (11) of the foundation frame (1) is fixed to the concrete base surface by bolts, and the mounting holes (11-1) are evenly distributed to ensure that the horizontal error of the foundation frame (1) is ≤5mm.

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