On-site anticorrosion operation platform and method for upstream face metal structure of roof-exposed embedded radial gate of hydropower station

Abstract

The invention discloses a hydropower station top-exposed embedded radial gate upstream face metal structure on-site anti-corrosion operation platform and method, the hydropower station top-exposed embedded radial gate upstream face metal structure on-site anti-corrosion operation platform comprises an anti-corrosion operation platform body arranged on a hydropower station dam, and the anti-corrosion operation platform body comprises a platform foundation support arranged in the area where a portal crane track is located; a platform structure frame is installed on the platform foundation support, a manned suspended platform is hinged to one side of the platform structure frame, and an anti-falling system is arranged between the hydropower station dam and the platform structure frame. A safe and reliable high-altitude maintenance operation platform can be provided for on-site anti-corrosion operation of the arc-shaped gate metal structure, the working efficiency is improved, the labor intensity of operators is reduced, and the construction operation safety of the overflowing face of the flood discharge flow channel is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of high-altitude working quick-assembly working platforms, in particular to an overhead LNG pipeline supporting structure with settlement compensation adjustment. Background Art

[0002] In water conservancy projects, especially hydropower stations, overflow holes are set on the dam body to ensure the safe operation of water retaining structures and prevent the occurrence of dam overflow events. The river water in the reservoir area is discharged and blocked by the open and closed state of the exposed top radial gate, thereby controlling the water level upstream of the reservoir at a reasonable safe height to ensure the safe operation of the water conservancy project. It can be seen that the safe operation of the exposed top radial gate is directly related to the safe operation of the hydropower station. Therefore, the operation and maintenance unit generally performs overall anti-corrosion treatment on the metal structure of the exposed top radial gate in accordance with relevant operation specifications to ensure the safety of the exposed top radial gate structure and stable operation. Therefore, the anti-corrosion work of the metal structure of the exposed top radial gate is particularly important.

[0003] Since the exposed-top radial gate is fixedly installed on the inclined surface of the overflow surface flow channel of the dam body, and the radial gate itself has a relatively large structural size, it cannot be dismantled and transported to the anti-corrosion center for anti-corrosion work. Anti-corrosion work can only be carried out on site. How to efficiently, conveniently and safely set up an inspection and maintenance operation platform required for anti-corrosion operations is an urgent problem that our operation and maintenance management personnel need to solve.

[0004] At present, the general practice is to use steel pipe scaffolding in the flood discharge channel to build an anti-corrosion maintenance work platform for workers. However, this method of setting up the maintenance platform has the following disadvantages: 1. Traditional steel pipe scaffolding cannot be effectively fixed on the inclined surface of the flow channel. It is necessary to drill holes and plant rebar on the flow channel surface, and then fix the vertical poles of the steel pipe scaffolding to the rebar parts by welding. After the scaffolding is dismantled, the rebar is cut off. However, this method is very harmful to the flow channel surface. When the flood discharge is high-speed, there is a small interface gap in the cut part, which makes the part at risk of scouring and cavitation, causing certain man-made damage to the flood discharge channel. 2. Due to the large structural dimensions of the radial gate, a full-height steel pipe scaffolding was required on the inclined flow channel on the backwater side of the radial gate. If this method were used, the erection period would be long, which would affect the maintenance period of the flood discharge equipment. Flood discharge facilities are generally overhauled before the flood season, and the length of the maintenance period directly affects whether the equipment can be put into standby use within the specified time. At the same time, the scaffolding process requires the measurement of the pitch, span, horizontality, and verticality of each steel pipe, and the tightening of each fastener must be checked one by one, which places high demands on the skills of the scaffolding workers.

[0005] 3. Traditional steel pipe scaffolding uses 6m steel pipes for erection. For high-altitude erection operations on inclined surfaces, the safe transportation and erection of materials are relatively difficult. The work requires the cooperation of multiple people, which requires a large number of people. At the same time, the weight of the steel pipes is also heavy, and the amount required for erection is also large, which increases the labor intensity of the operators. The maintenance platform set up in this way is also inconsistent with the current principles of safe, efficient and rapid maintenance. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an on-site anti-corrosion operation platform and method for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station. It can provide a safe and reliable high-altitude maintenance operation platform for on-site anti-corrosion operations of the radial gate metal structure, improve work efficiency, reduce the labor intensity of operators, and ensure the safety of construction operations on the flow surface of the flood discharge channel.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed-top embedded radial gate of a hydropower station, including an anti-corrosion working platform arranged on the dam of the hydropower station, the anti-corrosion working platform including a platform foundation support arranged in the area where the gantry crane track is located, a platform structure frame is installed on the platform foundation support, a manned suspended platform is hingedly provided on one side of the platform structure frame, and an anti-fall system is provided between the hydropower station dam and the platform structure frame.

[0008] Preferably, the platform foundation support includes a supporting cantilever beam, a rail clamping support and a counterweight system. The supporting cantilever beam is passed through the rail clamping support and is respectively connected to the counterweight system and the platform structure frame. The rail clamping support is slidably matched with the gantry crane track and can be locked in position.

[0009] Preferably, a limit block and a mounting bolt hole are provided on the supporting cantilever beam; the supporting cantilever beam passes through the top of the arc-shaped structural frame of the platform structural frame and is limited by the limit block and the bolts screwed into the mounting bolt holes; The rail clamping support comprises a support frame, a handwheel, a locking rod, a driven bevel gear, a driving bevel gear, a supporting travel wheel and a limiting cover. The central axis of the handwheel is fixedly connected to the center of the driving bevel gear, the driving bevel gear is meshed with the driven bevel gear, a hollow rotating sleeve is passed through the center of the driven bevel gear, the inner side of the rotating sleeve is threadedly engaged with the outer side of the locking rod; the supporting travel wheel is slidably engaged with the gantry crane track on the hydropower station dam; the locking rod can be moved axially to contact and press the gantry crane track to lock the position of the entire rail clamping support on the gantry crane track; the supporting cantilever beam is slidably engaged with the limiting groove inside the limiting cover; The counterweight system includes a counterweight bracket and a counterweight block. The counterweight bracket is provided with supporting feet and supporting cantilever beam mounting holes. The surface of the counterweight block is provided with a carrying handle. The supporting cantilever beam mounting holes are slidably matched with the supporting cantilever beam.

[0010] Preferably, the platform structure frame includes an arc-shaped structure frame, which is an internally hollow arc-shaped column frame structure. A channel ladder frame is provided inside the arc-shaped structure frame. A fence is provided on the top of the arc-shaped structure frame to form a safety isolation channel along the edge. A resistance wheel mechanism is provided on one side of the bottom of the arc-shaped structure frame.

[0011] Preferably, the curvature of the arc-shaped structural frame is consistent with the curvature of the water-facing surface of the arc-shaped gate, and its side is provided with a safety isolation door, a hanging point for a manned suspended platform, a hinged seat for mounting a manned suspended platform, and a mounting hole for a platform load-bearing rope; The resistance wheel mechanism includes a mounting support, both sides of which are connected to a roller mounting frame via a buffer spring, and a roller is hingedly provided on the roller mounting frame, and the roller fits the water-facing surface of the arc gate.

[0012] Preferably, the manned suspended platform includes a folding platform, one side of the folding platform is hinged to one side of the bottom of the arc-shaped structural frame, a platform guardrail is provided on the side of the folding platform, and a pull rod device is provided between the folding platform and the side of the arc-shaped structural frame.

[0013] Preferably, the folding platform includes a main platform and a secondary platform, the main platform is hinged to the manned suspended platform mounting hinge seat of the arc-shaped structural frame through a mounting hinge hole, one end of the secondary platform is hinged to the main platform, and the other end is provided with a pull rod mounting hinge seat; The platform guardrail is installed on the upstream and downstream hinges of the main platform and the auxiliary platform, and can be rotated around the hinge within the range of 0°-90° to switch between the protective state and the folded state; The pull rod device includes an upper pull rod sleeve and a lower pull rod. The upper pull rod sleeve is connected to the suspension point of the manned suspended platform of the arc-shaped structure frame, and the lower pull rod is connected to the pull rod installation hinge seat of the auxiliary platform.

[0014] Preferably, the anti-fall system includes a platform anti-fall device and a personnel anti-fall device.

[0015] Preferably, the platform anti-fall device includes a rail clamp and a steel wire rope. The rail clamp is fixed to the dam gantry crane track. Four rail clamp supports are installed on the gantry crane track and locked on the gantry crane track. Then, the supporting cantilever beam is installed on the rail clamp supports, and a counterweight bracket is installed at the tail of the supporting cantilever beam, and a counterweight block of corresponding weight is placed according to the cantilever weight. Step 2: Lift the radial gate to the fully open position. Use the hydraulic hoist to lift the radial gate that needs to replace the water seal to the fully open position H2 to prepare for the subsequent installation of the platform structure frame. Step 3: Installation of platform structure frame: Use gantry crane to lift the curved structure frame to the installation entrance position, make the contact wheel mechanism installed at the bottom of the curved structure frame contact the water-facing surface of the radial gate, and slowly lower the curved structure frame with the gantry crane. Guided by the curved surface of the radial gate, it slowly enters the upstream side of the water-facing surface of the radial gate. After it is lowered to the installation position of the supporting cantilever beam, the curved structure frame is placed on the supporting cantilever beam and then fixed with bolts to ensure that the curved structure frame and the supporting cantilever beam are firmly connected. Step 4: Installation of platform structure frame anti-fall device: Install the rail clamp on the gantry crane track, and then connect the rail clamp to the upstream anti-fall installation point of the curved structure frame through a wire rope to achieve secondary anti-fall protection for the curved structure frame; Step 5: Installation of the load-bearing rope of the manned suspended platform: Install the rail clamp on the gantry crane track, and then connect the rail clamp to the upstream anti-fall installation point of the auxiliary platform of the manned suspended platform through a wire rope to achieve effective pulling installation of the manned suspended platform; Step 6: Deploy the manned suspended platform: Open the folding platform on the side of the arc-shaped structure frame in an orderly manner. When the folding platform is fully opened horizontally, the pull rod device is in a stretched state, effectively suspending the folding platform safely. Then, the upstream and downstream guardrails of the platform are flipped and built to achieve effective protection for the manned suspended platform. Step 7: Installation of personnel anti-falling device: The personnel anti-falling device is installed along the channel ladder frame set up inside the arc-shaped structure frame for personnel to go up and down. The anti-falling guide rail is installed on the arc-shaped structure frame and is laid out along the channel ladder frame inside the arc-shaped structure frame. It is used in conjunction with the brake slider to ensure the safety of personnel climbing and passing through the arc-shaped structure frame, preventing the risk of personnel falling during the climbing process, and ensuring the safety of personnel passage; Step 8: Adjust the platform structure frame anti-fall device to separate the friction wheel mechanism installed on the arc structure frame from the arc gate, preparing for subsequent anti-corrosion work; Step 9: Rust and paint removal of the radial gate: The anti-corrosion personnel stand on the folding platform of the anti-corrosion work platform and open and close the radial gate to make it move along the arc track on the inner side of the arc structure frame. At the same time, the anti-corrosion personnel move back and forth on the folding platform to carry out rust and paint removal work on all water-facing areas of the radial gate. Specifically, according to the rust removal process, the radial gate is rusted and painted. During this process, waste is recycled to prevent environmental pollution. Step 10: Anti-corrosion of radial gates: According to the anti-corrosion process, the radial gates are subjected to bottom zinc spraying, primer spraying, intermediate paint spraying and topcoat spraying. The radial gates will also be opened and closed during the above work. At the same time, the anti-corrosion personnel move back and forth on the folding platform to cooperate in the anti-corrosion work of all water-facing areas of the radial gates.

[0016] Beneficial effects of the present invention: 1. The present invention can provide a safe and reliable high-altitude maintenance operation platform for on-site anti-corrosion operations of radial gate metal structures, thereby improving work efficiency, reducing the labor intensity of operators, and ensuring the safety of construction operations at the flow surface of the flood discharge channel.

[0017] 2. The present invention is mainly used for when the metal structure of the water-facing surface of the exposed-top radial gate needs to be subjected to anti-corrosion operations on site, providing a safe and reliable working platform for construction workers to ensure the smooth completion of the anti-corrosion task; in order to facilitate the safe erection of workers, the platform is designed as a modular structural component, which does not require on-site processing and cutting, and each component is assembled using a universal quick-assembly method. The working platform has a simple structure, a high degree of integration, rapid erection and disassembly, and convenient transportation. The working platform can be erected according to the actual situation on site, and can adapt to the needs of suspended surface operations of arc-shaped equipment at different inclination angles, different heights, and different parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of an on-site anti-corrosion work platform for the metal structure of the water-facing surface of an exposed roof embedded radial gate in a hydropower station; Figure 2 for Figure 1 Schematic diagram of the structure from the upstream perspective; Figure 3 Schematic diagram of the supporting cantilever beam structure; Figure 4 Schematic diagram of the rail clamp support structure; Figure 5 Schematic diagram of the counterweight system structure; Figure 6 This is a schematic diagram of the installation of the curved structural frame and its accessories; Figure 7 This is a schematic diagram of the installation of the friction wheel mechanism; Figure 8 This is a schematic diagram of the installation of various components of the manned suspended platform; Figure 9 This is a schematic diagram of the folding of the components of the manned suspended platform; Figure 10 This is a schematic diagram of the fall protection system installation; Figure 11 This is a schematic diagram of the on-site application structure of an on-site anti-corrosion work platform for the water-facing metal structure of an exposed roof embedded radial gate in a hydropower station. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: Figure 1-10As shown, an on-site anti-corrosion work platform for the metal structure of the water-facing surface of the exposed-top embedded radial gate of a hydropower station includes an anti-corrosion work platform 2 arranged on the hydropower station dam 0, and the anti-corrosion work platform 2 includes a platform foundation support arranged in the area where the gantry crane track 03 is located, and a platform structure frame is installed on the platform foundation support. A manned suspended platform is hingedly provided on one side of the platform structure frame, and an anti-fall system is provided between the hydropower station dam 0 and the platform structure frame.

[0021] Preferably, the platform foundation support includes a supporting cantilever beam 20, a rail clamping support 21 and a counterweight system 22. The supporting cantilever beam 20 is passed through the rail clamping support 21 and is respectively connected to the counterweight system 22 and the platform structure frame. The rail clamping support 21 slides with the gantry crane track 03 and can be locked in position.

[0022] Preferably, if Figure 3 As shown, the supporting cantilever beam 20 is provided with a limit block 20-1 and a mounting bolt hole 20-2; the supporting cantilever beam 20 passes through the top of the arc-shaped structural frame 23 of the platform structural frame, and is limited by the limit block 20-1 and the bolts screwed into the mounting bolt holes 20-2; the supporting cantilever beam 20 is the main supporting component of the present invention, which is mainly used to support and fix the arc-shaped structural frame 20, and provide a safe and reliable basic support for the arc-shaped structural frame 20. The supporting cantilever beam 20 is provided with a limit block 20-1 and a mounting bolt hole 20-2 to prevent the arc-shaped structural frame 20 from moving on the supporting cantilever beam 20 and prevent the arc-shaped structural frame 20 from separating from the basic support.

[0023] like Figure 4As shown, the rail clamping support 21 includes a support frame 211, a hand wheel 212, a locking rod 213, a driven bevel gear 214, a driving bevel gear 215, a supporting walking wheel 216 and a limiting cover 217. The central axis of the hand wheel 212 is fixedly connected to the center of the driving bevel gear 215, and the driving bevel gear 215 is meshed with the driven bevel gear 214. A hollow rotating sleeve is passed through the center of the driven bevel gear 214, and the inner side of the rotating sleeve is threadedly matched with the outer side of the locking rod 213; the supporting walking wheel 216 is slidably matched with the gantry crane track 03 on the hydropower station dam 0; the locking rod 213 can move axially to contact and press the gantry crane track 03 to lock the position of the entire rail clamping support 21 on the gantry crane track 03; the supporting cantilever beam 20 slides with the limiting groove on the inner side of the limiting cover 217; the rail clamping support 21 is clamped and installed on the track to support the cantilever beam 20, so as to realize the moving and walking function of the anti-corrosion platform 2 on the track. At the same time, the rail clamping function can prevent the device from derailing, thereby ensuring the safety of the anti-corrosion platform 2. The active bevel gear 215 can be manually rotated by the handwheel 212 to drive the driven bevel gear 214 to rotate, and the driven bevel gear 214 drives the rotating sleeve to rotate. A radial limiting mechanism (such as a key and keyway matching mechanism) is provided on the surface of the locking rod, so the locking rod 213 can reciprocate in the axial direction, and the axial movement can resist and press the gantry crane track 03 to lock the position of the entire rail clamping support 21 on the gantry crane track 03, thereby realizing the effective clamping and locking of the track by the device.

[0024] like Figure 5 As shown, the counterweight system 22 includes a counterweight bracket 221 and a counterweight block 222. The counterweight bracket 221 is provided with support feet 221-2 and a support cantilever beam mounting hole 221-1. The surface of the counterweight block 222 is provided with a carrying handle 222-1. The support cantilever beam mounting hole 221-1 is slidably engaged with the support cantilever beam 20. The counterweight system 22 is a major safety accessory of the present invention. It is installed at the rear of the support cantilever beam 20 through a quick connector to provide a safe counterweight for the anti-corrosion platform. The corresponding counterweight block 222 can be placed according to different passenger weights to ensure the safety of the device during passenger operation. The counterweight system 22 mainly consists of a counterweight bracket 221 and a counterweight block 222. The counterweight bracket 221 is provided with support feet 221-2 and a support cantilever beam mounting hole 221-1. The counterweight block 222 is placed on the counterweight bracket 221, and the main body 222 is provided with a carrying handle 222-1 to facilitate transportation.

[0025] Preferably, if Figure 6As shown, the platform structure frame includes an arc-shaped structure frame 23, which is an arc-shaped column frame structure with a hollow interior. A channel ladder frame is provided inside the arc-shaped structure frame 23, a fence 24 is provided on the top of the arc-shaped structure frame 23 to form a safety isolation channel along the edge, and a resistance wheel mechanism 25 is provided on one side of the bottom of the arc-shaped structure frame 23.

[0026] Preferably, the curvature of the arc-shaped structural frame 23 is consistent with the curvature of the water-facing surface of the arc gate 4, and its side is provided with a safety isolation door 231, a hanging point 232 for a manned suspended platform, a hinged seat 233 for mounting a manned suspended platform, and a mounting hole 234 for a platform load-bearing rope. The arc-shaped structural frame 23 is the main functional component of the present invention. The curvature of its main structure is basically consistent with the curvature of the arc gate 4, ensuring that the arc gate 4 does not interfere with the door during the door movement. The upper end of the structural frame is placed on the supporting cantilever beam 20 and then fixed to it by bolts to prevent the arc gate structural frame 23 from sliding. The fence 24 is installed at the upper end of the arc-shaped structural frame 23 to build an effective safety isolation fence for personnel entering the passage opening, ensuring safe passage at the edge. like Figure 7 As shown, the friction wheel mechanism 25 includes a mounting support 251, which is connected to a roller mounting frame 252 on both sides via a buffer spring 253. The roller mounting frame 252 is hingedly provided with a roller 254, which is in contact with the water-facing surface of the radial gate 4. The friction wheel mechanism 25 is installed on both sides of the bottom of the arc-shaped structure frame 23 and mainly consists of the mounting support 251, the roller mounting frame 252, the buffer spring 253 and the roller 254. The roller 254 of the main body can roll in contact with the water-facing surface of the radial gate 4. During the opening and closing process of the radial gate, the anti-corrosion platform is ensured not to interfere with the radial gate 4, ensuring the safe use of the platform.

[0027] Preferably, if Figure 8 As shown, the manned suspended platform includes a folding platform 26 , one side of the folding platform 26 is hinged to the bottom side of the arc-shaped structural frame 23 , a platform guardrail 27 is provided on the side of the folding platform 26 , and a pull rod device 28 is provided between the folding platform 26 and the side of the arc-shaped structural frame 23 .

[0028] Preferably, the folding platform 26 includes a main platform 261 and a sub-platform 262. The main platform 261 is hinged to the manned suspended platform mounting hinge seat 233 of the arc-shaped structural frame 23 through a mounting hinge hole 261-1. One end of the sub-platform 262 is hinged to the main platform 261, and the other end is provided with a pull rod mounting hinge seat 262-2. The platform guardrail 27 is installed on the upstream and downstream hinges of the main platform 261 and the auxiliary platform 262, and can be rotated around the hinge within the range of 0°-90° to switch between the protective state and the folded state; Figure 8As shown in the figure, when it is rotated to 90 degrees, the guardrail is in the erected state, realizing the safety protection of the platform passage area; Figure 9 As shown, when rotated to 0°, the guardrail is in a retracted state, which facilitates the folding platform 26 to be retracted.

[0029] The rod assembly 28 comprises an upper rod sleeve 282 and a lower rod 281. The upper rod sleeve 282 is connected to the suspension point 232 of the manned suspended platform on the curved structural frame 23, while the lower rod 281 is connected to the rod mounting hinge 262-2 of the auxiliary platform 262. The rod assembly 28 is the primary pulling member of the manned suspended platform, enabling efficient extension and construction of the platform and ensuring its safe use.

[0030] Preferably, if Figure 10 As shown, the anti-fall system includes a platform anti-fall device 51 and a personnel anti-fall device 52.

[0031] Preferably, the platform anti-fall device 51 includes a rail clamp 511 and a wire rope 512. The rail clamp 511 is fixed on the gantry crane track 03. One end of the wire rope 512 is connected to the rail clamp 511, and the other end is connected to the anti-fall installation point on the arc-shaped structure frame 23 and the folding platform 26. The device realizes effective protection of the anti-corrosion working platform 2.

[0032] The personnel fall prevention device 52 comprises a fall prevention rail 521 and a brake block. The fall prevention rail 521 is arranged along the passage ladder frame within the curved structure 23, and the brake block is connected to the climbing personnel safety equipment. This device ensures the safety of personnel climbing and traversing the curved structure 23, preventing the risk of falling during climbing and ensuring safe passage.

[0033] Example 2: Figure 11 As shown, the present invention also discloses a method for using the above-mentioned on-site anti-corrosion operation platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of the hydropower station, which includes the following steps: Step 1: Platform foundation support installation: Install four rail clamping supports 21 on the dam gantry crane track 03 at the radial gate opening 01 where the water seal needs to be replaced, and lock them on the gantry crane track 03. Then install the supporting cantilever beam 20 on the rail clamping supports 21, and install the counterweight bracket 221 at the tail end of the supporting cantilever beam 20. Place a counterweight block 222 of the corresponding weight according to the cantilever weight; Step 2: Lift the radial gate to the fully open position. Use the hydraulic hoist to lift the radial gate that needs to replace the water seal to the fully open position H2 to prepare for the subsequent installation of the platform structure frame. Step 3: Installation of the platform structure frame: Use the gantry crane 1 to lift the curved structure frame 23 to the installation entrance position, and make the contact wheel mechanism 25 installed at the bottom of the curved structure frame 23 contact the water-facing surface of the radial gate. The gantry crane 1 slowly lowers the curved structure frame 23, and slowly enters the upstream side of the water-facing surface of the radial gate under the guidance of the curved surface of the radial gate 4. After lowering to the installation position of the supporting cantilever beam 20, the curved structure frame 23 is placed on the supporting cantilever beam 20, and then fixed with bolts to ensure that the curved structure frame 23 is firmly connected to the supporting cantilever beam 20; Step 4: Installation of platform structure frame anti-fall device: Install the rail clamp 511 on the gantry crane track 03, and then connect the rail clamp 511 to the upstream anti-fall installation point of the arc structure frame 23 through the wire rope 512 to achieve secondary anti-fall protection for the arc structure frame 23; Step 5: Install the load-bearing rope of the manned suspended platform: Install the rail clamp 511 on the gantry crane track 03, and then connect the rail clamp 511 to the upstream anti-fall installation point of the auxiliary platform 262 of the manned suspended platform through the wire rope 512 to achieve effective pulling installation of the manned suspended platform; Step 6: Deploy the manned suspended platform: The folding platform 26 on the side of the arc-shaped structural frame 23 is opened in an orderly manner. When the folding platform 26 is fully opened horizontally, the pull rod device 28 is in a stretched state, and the folding platform 26 is effectively and safely suspended. Then, the upstream and downstream guardrails 27 of the platform are flipped and built to achieve effective protection for the manned suspended platform. Step 7: Installation of personnel anti-falling device: A personnel anti-falling device 52 for personnel to go up and down is arranged along the channel ladder frame provided inside the arc-shaped structural frame 23. The anti-falling guide rail 521 is installed on the arc-shaped structural frame 23 and is arranged along the channel ladder frame inside the arc-shaped structural frame 23. When used in conjunction with the brake slider, it can ensure the safety of personnel climbing and passing through the arc-shaped structural frame 23, prevent the risk of personnel falling during the climbing process, and ensure the safety of personnel passing; Step 8: Adjust the platform structure frame anti-fall device to separate the resistance wheel mechanism 25 installed on the arc structure frame 23 from the arc gate, in preparation for subsequent anti-corrosion work; Step 9: Rust and paint removal of the radial gate: The anti-corrosion personnel stand on the folding platform 26 of the anti-corrosion working platform 2, and open and close the radial gate 4 so that the radial gate 4 moves along the arc track on the inner side of the arc structure frame 23. At the same time, the anti-corrosion personnel move back and forth on the folding platform 26 to carry out rust and paint removal work on all water-facing areas of the radial gate 4. Specifically, according to the rust removal process, the radial gate is rusted and painted. During this process, waste is recycled to prevent environmental pollution. Step 10: Anti-corrosion of radial gate: According to the anti-corrosion process, the radial gate is subjected to bottom zinc spraying, primer spraying, intermediate paint spraying and topcoat spraying. During the above work, the radial gate will also be opened and closed. At the same time, the anti-corrosion personnel move back and forth on the folding platform 26 to cooperate with the anti-corrosion work of all water-facing areas of the radial gate 4.

[0034] Figure 10 In order to facilitate understanding of the overall concept of the present invention, it should be noted that: 0 is the dam of the hydropower station; 01 is the opening of the surface hole gate slot; 02 is the surface hole flood discharge channel; 03 is the gantry crane track; 1 is the gantry crane; 10 is the slewing crane.

[0035] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An on-site anti-corrosion operation platform for a metal structure on the water-facing surface of an exposed roof embedded radial gate of a hydropower station, comprising an anti-corrosion operation platform (2) provided on a dam (0) of a hydropower station, wherein the anti-corrosion operation platform (2) comprises a platform foundation support provided in the area where a gantry crane track (03) is located, and is characterized in that: A platform structural frame is installed on the platform foundation support, a manned suspended platform is hingedly provided on one side of the platform structural frame, and an anti-fall system is provided between the hydropower station dam (0) and the platform structural frame.

2. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 1 is characterized by: The platform foundation support comprises a supporting cantilever beam (20), a rail clamping support member (21) and a counterweight system (22); the supporting cantilever beam (20) is passed through the rail clamping support member (21) and is respectively connected to the counterweight system (22) and the platform structure frame; the rail clamping support member (21) is slidably matched with the gantry crane track (03) and can be locked in position.

3. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 1 is characterized by: The supporting cantilever beam (20) is provided with a limit block (20-1) and a mounting bolt hole (20-2); the supporting cantilever beam (20) passes through the top of the arc-shaped structural frame (23) of the platform structural frame and is limited by the limit block (20-1) and the bolts screwed into the mounting bolt holes (20-2); The rail clamping support member (21) includes a support frame (211), a hand wheel (212), a locking rod (213), a driven helical gear (214), a driving helical gear (215), and a supporting walking wheel (216). and a limiting cover (217), the central axis of the hand wheel (212) is fixedly connected to the center of the active bevel gear (215), the active bevel gear (215) is meshed with the driven bevel gear (214), the center of the driven bevel gear (214) is provided with a hollow rotating sleeve, the inner side of the rotating sleeve is threadedly engaged with the outer side of the locking rod (213); the supporting walking wheel (216) is slidably engaged with the gantry crane track (03) on the hydropower station dam (0); the locking rod (213) can move axially to contact and press the gantry crane track (03) to lock the position of the entire rail clamping support (21) on the gantry crane track (03); the supporting cantilever beam (20) is slidably engaged with the limiting groove on the inner side of the limiting cover (217); The counterweight system (22) comprises a counterweight bracket (221) and a counterweight block (222); the counterweight bracket (221) is provided with a supporting foot (221-2) and a supporting cantilever beam mounting hole (221-1); a carrying handle (222-1) is provided on the surface of the counterweight block (222); and the supporting cantilever beam mounting hole (221-1) is slidably engaged with the supporting cantilever beam (20).

4. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 1 is characterized by: The platform structure frame includes an arc-shaped structure frame (23), which is an arc-shaped column frame structure with a hollow interior. A passage ladder frame is provided inside the arc-shaped structure frame (23), a fence (24) is provided on the top of the arc-shaped structure frame (23) to form a safety isolation passage along the edge, and a resistance wheel mechanism (25) is provided on one side of the bottom of the arc-shaped structure frame (23).

5. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 4 is characterized by: The arc of the arc-shaped structural frame (23) is consistent with the arc of the water-facing surface of the arc-shaped gate (4), and its side is provided with a safety isolation door (231), a hanging point (232) for a manned suspended platform, a hinged seat (233) for mounting a manned suspended platform, and a platform load-bearing rope mounting hole (234); The resisting wheel mechanism (25) includes a mounting support (251), both sides of which are connected to a roller mounting frame (252) via a buffer spring (253), and a roller (254) is hingedly provided on the roller mounting frame (252), and the roller (254) is in contact with the water-facing surface of the arc gate (4).

6. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 5 is characterized by: The manned suspended platform includes a folding platform (26), one side of the folding platform (26) is hinged to one side of the bottom of the arc-shaped structural frame (23), a platform guardrail (27) is provided on the side of the folding platform (26), and a pull rod device (28) is provided between the folding platform (26) and the side of the arc-shaped structural frame (23).

7. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 6, characterized in that: The folding platform (26) includes a main platform (261) and a secondary platform (262), wherein the main platform (261) is hinged to the manned suspended platform mounting hinge seat (233) of the arc-shaped structural frame (23) via a mounting hinge hole (261-1), and one end of the secondary platform (262) is hinged to the main platform (261), and the other end is provided with a pull rod mounting hinge seat (262-2); The platform guardrail (27) is installed on the hinge seats on the upstream and downstream sides of the main platform (261) and the auxiliary platform (262), and can rotate around the hinge seats within the range of 0°-90° to achieve switching between a protective state and a folded state; The pull rod device (28) comprises an upper pull rod sleeve (282) and a lower pull rod (281), wherein the upper pull rod sleeve (282) is connected to the manned suspended platform suspension point (232) of the arc-shaped structural frame (23), and the lower pull rod (281) is connected to the pull rod mounting hinge seat (262-2) of the auxiliary platform (262).

8. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 6 is characterized by: The anti-fall system comprises a platform anti-fall device (51) and a personnel anti-fall device (52).

9. The on-site anti-corrosion working platform for the metal structure of the water-facing surface of the exposed roof embedded radial gate of a hydropower station according to claim 8 is characterized by: The platform anti-fall device (51) includes a rail clamp (511) and a steel wire rope (512), wherein the rail clamp (511) is fixed on the gantry crane track (03), one end of the steel wire rope (512) is connected to the rail clamp (511), and the other end is connected to the anti-fall installation point on the arc-shaped structure frame (23) and the folding platform (26); The personnel anti-falling device (52) comprises an anti-falling guide rail (521) and a brake slide block, wherein the anti-falling guide rail (521) is arranged along the channel ladder frame inside the arc-shaped structural frame (23), and the brake slide block is connected to the climbing personnel safety equipment.

10. A method for using the on-site anti-corrosion work platform for the metal structure of the water-facing surface of an exposed roof embedded radial gate of a hydropower station according to any one of claims 1 to 9, characterized in that: It includes the following steps: Step 1: Platform foundation support installation: Install four rail clamping supports (21) on the dam gantry crane track (03) at the radial gate opening (01) where the water seal needs to be replaced, and lock them on the gantry crane track (03). Then, install the supporting cantilever beam (20) on the rail clamping supports (21), and install the counterweight bracket (221) at the tail of the supporting cantilever beam (20), and place a counterweight block (222) of corresponding weight according to the cantilever weight. Step 2: Lift the radial gate to the fully open position. Use the hydraulic hoist to lift the radial gate that needs to replace the water seal to the fully open position H2 to prepare for the subsequent installation of the platform structure frame. Step 3: Installation of the platform structure frame: The arc structure frame (23) is hoisted to the installation entrance position by the gantry crane (1), and the resistance wheel mechanism (25) installed at the bottom of the arc structure frame (23) is brought into contact with the water-facing surface of the arc gate. The gantry crane (1) slowly lowers the arc structure frame (23), and slowly enters the upstream side of the water-facing surface of the arc gate under the guidance of the arc surface of the arc gate (4). After it is lowered to the installation position of the supporting cantilever beam (20), the arc structure frame (23) is placed on the supporting cantilever beam (20), and then fixed by bolts to ensure that the arc structure frame (23) is firmly connected to the supporting cantilever beam (20); Step 4: Installation of the platform structure frame anti-fall device: Install the rail clamp (511) on the gantry crane track (03), and then connect the rail clamp (511) to the upstream anti-fall installation point of the arc structure frame (23) through the wire rope (512) to achieve secondary anti-fall protection for the arc structure frame (23); Step 5: Installation of the load-bearing rope of the manned suspended platform: Install the rail clamp (511) on the gantry crane track (03), and then connect the rail clamp (511) to the upstream anti-fall installation point of the auxiliary platform (262) of the manned suspended platform through the wire rope (512) to achieve effective pulling installation of the manned suspended platform; Step 6: Deploy the manned suspended platform: The folding platform (26) on the side of the arc-shaped structural frame (23) is opened in an orderly manner. When the folding platform (26) is in a horizontally fully opened state, the pull rod device (28) is in a stretched state, and the folding platform (26) is effectively suspended safely. Then, the upstream and downstream guardrails (27) of the platform are flipped and built to achieve effective protection of the manned suspended platform. Step 7: Installation of personnel anti-falling device: A personnel anti-falling device (52) for personnel to go up and down is arranged along the channel ladder frame set inside the arc-shaped structure frame (23). The anti-falling guide rail (521) is installed on the arc-shaped structure frame (23) and is arranged along the channel ladder frame inside the arc-shaped structure frame (23). When used in conjunction with the brake slider, it can ensure the safety of personnel climbing and passing in the arc-shaped structure frame (23), prevent the risk of personnel falling during the climbing process, and ensure the safety of personnel passing; Step 8: Adjust the platform structure frame anti-fall device to separate the resistance wheel mechanism (25) installed on the arc structure frame (23) from the arc gate, so as to prepare for the subsequent anti-corrosion work; Step 9: Derusting and removing paint from the radial gate: The anti-corrosion personnel stand on the folding platform (26) of the anti-corrosion working platform (2), and open and close the radial gate (4) so that the radial gate (4) moves along the arc track on the inner side of the arc structure frame (23). At the same time, the anti-corrosion personnel move back and forth on the folding platform (26) to carry out the rust and paint removal work on all water-facing areas of the radial gate (4). Specifically, according to the rust removal process, the radial gate is derusted and painted, and waste is recycled in the process to prevent environmental pollution. Step 10: Anti-corrosion of the radial gate: According to the anti-corrosion process, the radial gate is subjected to the following procedures: zinc spraying on the bottom surface, primer spraying, intermediate paint spraying, and topcoat spraying. During the above-mentioned work, the radial gate is also opened and closed. At the same time, the anti-corrosion personnel move back and forth on the folding platform (26) to cooperate in the anti-corrosion work of all water-facing areas of the radial gate (4).

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