A multifunctional mobile integrated platform for tailwater corridor of a hydropower station and its use method

Abstract

The present invention provides a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station and a method for using the platform. The multifunctional mobile integrated platform includes a platform body, wherein the four corners of the bottom of the platform body are equipped with a motor drive system for driving the entire platform body to move. The top of the platform body is slidably installed with a parallel main slide and auxiliary slide; the auxiliary slide is equipped with a retractable ladder set for manual climbing; the front side of the platform body is slidably installed with a slidable lifting system, and the traction rope of the slidable lifting system selectively passes around the movable hanging point or movable pulley on the main slide; the front side of the platform body is provided with a mobile integrated platform control area; and the auxiliary slide is equipped with a small lifting mechanism. This method integrates multiple tailwater inlet and outlet equipment, providing a safe, efficient, and convenient way for personnel and materials and equipment to enter and exit the tailwater pipe, greatly facilitating the smooth implementation of this work.

Description

Technical Field

[0001] The present invention relates to the technical field of hydropower station unit gallery maintenance, and in particular to a hydropower station tailwater gallery multifunctional mobile integrated platform and a use method thereof. Background Art

[0002] During the annual unit maintenance, after the tailwater entrance door is opened in the tailwater corridor, entering the tailwater pipe for maintenance and setting up the unit maintenance rack requires a large amount of manpower and material resources, and each task mainly relies on manual methods to be completed, that is: after the tailwater entrance door is opened by manpower, the tailwater pipe entry ladder is manually hung and installed so that personnel have the foundation to enter the tailwater pipe, and then the various heavy materials required for the work in the tailwater pipe are manually lowered into the tailwater pipe through a manual pulley. After the various maintenance tasks are completed, the site is manually cleared one by one and all materials are transferred out of the tailwater pipe. The on-site construction personnel have low work efficiency, high labor intensity, and extremely high safety risk factors.

[0003] Currently, there are many inconveniences and hidden dangers in carrying out various tasks within the tailrace corridor: ① The overall space is small, making it difficult for personnel to operate; ② A large number of personnel are involved, and most tasks require the cooperation of multiple people to complete; ③ Large power tools are required to open and close the tailrace entrance, which is labor-intensive for workers; ④ The height difference between the platforms is large, posing safety risks for working near edges and at heights; ⑤ A retractable ladder needs to be manually set up at the tailrace entrance, and the installation and storage of the retractable ladder require multiple people to manually retract and extend; ⑥ The various heavy materials required for the erection of the unit maintenance rack need to be lowered into the tailrace pipe by manpower via pulleys, and then manually transferred to the ground of the tailrace corridor after the maintenance is completed. This is extremely labor-intensive and poses extremely high safety risks; ⑦ The on-site lifting points are fixed anchor points, which are not convenient for carrying out various lifting tasks on site; ⑧ The site faces many safety hazards such as poor communication, inconvenient communication, insufficient lighting, and slippery holes. Summary of the Invention

[0004] The present invention provides a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station and a method for using the platform. Through the effective implementation of this platform and method, the current difficulties in the maintenance of the tailwater pipe equipment entering and exiting the tailwater corridor of the hydropower station can be completely solved. This method integrates a variety of tailwater inlet and outlet equipment, providing a safe, efficient and convenient way of passage for personnel and material equipment to enter and exit the tailwater pipe, thereby completely replacing the original manual method, providing great convenience for the smooth development of this work, and proposing new solutions and plans for promoting the integration and electrification of auxiliary maintenance innovation of hydropower station equipment.

[0005] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station, the multifunctional mobile integrated platform includes a platform body, the bottom four corners of the platform body are equipped with a motor drive system for driving the entire platform body to move, the top of the platform body is slidably installed with a main slide bar and a secondary slide bar arranged in parallel; a retractable ladder set for manual climbing is installed on the secondary slide bar; a slidable lifting system is slidably installed on the front side of the platform body, and the traction rope of the slidable lifting system selectively bypasses the movable hanging point or movable pulley on the main slide bar; a mobile integrated platform control area is provided on the front side of the platform body; and a small lifting mechanism is installed on the secondary slide bar.

[0006] Preferably, the platform body comprises vertically arranged high beams, the two high beams located at the front and rear sides are fixedly connected at both ends by a long beam, and the two high beams located at the left and right sides are fixedly connected at both ends by a wide beam, and the top of the high beam is symmetrically hinged with foldable and telescopic support rods on both sides;

[0007] The high beam adopts a telescopic structure and is equipped with a high beam synchronous adjustment mechanism to adjust the height of the entire platform body;

[0008] The wide beam adopts a telescopic structure and is equipped with a wide beam synchronous adjustment mechanism to adjust the width of the entire platform body.

[0009] Preferably, a retractable pedal is rotatably installed between the two groups of sorghums on the left and the wide beam at the bottom. When the platform is in use, the retractable pedal is in a lowered state and supported on the two long beams at the bottom, forming a load-bearing platform together with the wide beam at the bottom on the left; when the platform is not in use, the retractable pedal is in a retracted state and fixed between the two sorghums on the left and on the wide beam at the bottom, serving as a fence baffle.

[0010] Preferably, the four inner top corners of the platform body are fitted with detachable quick-connect lighting systems, which are used for internal lighting of the entire platform, tailwater pipe entry well, tailwater entry door and turbine tailwater pipe.

[0011] Preferably, the motor-driven system is an independent motor-driven wheel set, and the motor-driven system is provided with a locking device and a steering device. The wheel set is a load-bearing wheel that can carry a certain weight. The front and rear wheel sets are linked and synchronized to drive the multifunctional mobile integrated platform to move forward, backward, stop, lock, turn left, and turn right. The motor-driven system is connected to the control area of the mobile integrated platform and is controlled by buttons.

[0012] Preferably, the mobile integrated platform control area includes a mobile platform master control area, a retractable ladder and self-climbing mechanism control area, a lifting mechanism control area and an accessory control area;

[0013] A power supply placement area is provided below the control area of the mobile integrated platform, and the power supply placement area is arranged in the lower right corner area between the long beam and the high beam. It is composed of a stacked rechargeable and dischargeable battery assembly, fixed with a rear thin frame structure, and an external power cord is reserved to charge the battery pack when the battery is out of power or directly connect to the power interface on the external power cabinet, thereby providing a power source for the multifunctional mobile integrated platform.

[0014] Preferably, a fixed rod is installed between the two sorghums located on the front side, and a double slide rail structure is formed between the fixed rod and the long beam at the bottom of the corresponding side, and is used to slide and support the slidable lifting system;

[0015] The sliding lifting system is a form of multiple lifting mechanisms arranged in parallel, which adopts electric drive and has self-locking and anti-fall auxiliary functions. Through the steel wire rope or rope provided by its own lifting mechanism, it passes through the movable lifting point and movable pulley to achieve lifting and lowering of the heavy objects and personnel that need to be transferred.

[0016] Preferably, the retractable ladder set is installed in the middle of the secondary slide bar, and an electromagnetic slide rail locking device is provided on the top. The retractable ladder set includes a small lifting mechanism, a suspension connection device, a wire rope, a main ladder, a first secondary ladder, a second secondary ladder, a limit locking mechanism and an anti-fall system;

[0017] One end of the suspension connection device is installed on the auxiliary slide bar and is firmly connected to the slide rail on the auxiliary slide bar without falling off and can be locked in position;

[0018] One end of the wire rope is fixed to the end of the second auxiliary ladder of the retractable ladder set, and the other end is led out from the small lifting mechanism and can realize the electric extension and retraction of the retractable ladder set;

[0019] The upper part of the main ladder is connected to the suspension connection device, and a slide rail is reserved on the main ladder to match the first auxiliary ladder;

[0020] The first auxiliary ladder is inserted through the slide rail on the main ladder, so that the auxiliary ladder can slide up and down the main ladder. The upper part of the ladder is also reserved with a slide rail to cooperate with the second auxiliary ladder.

[0021] The second auxiliary ladder is inserted into the slide rail on the first auxiliary ladder, so that the second auxiliary ladder can slide up and down on the first auxiliary ladder. A hook hanging point is installed on the top to connect with the wire rope;

[0022] The limit locking mechanisms are respectively installed at the bottom of the main ladder and the bottom of the first auxiliary ladder, and are used to limit the travel of the retractable ladder set when it is retracting;

[0023] The anti-fall system is installed on the top of the second auxiliary ladder, and its anti-fall lead is suspended on the mobile hanging point on the auxiliary slide bar.

[0024] Preferably, the ends of the main slide bar and the auxiliary slide bar that slide with the wide beam are equipped with electromagnetic slide rail locking devices;

[0025] The electric self-climbing mechanism is suspended under the movable lifting point on the main slide bar. When construction personnel need to enter the tailwater pipe electrically to work, instead of manually entering through the retractable ladder kit, the automatic climbing mechanism is used to enable personnel to enter and exit the tailwater pipe electrically; a five-point safety belt is suspended below the electric self-climbing mechanism. After the personnel put on the safety belt, they connect to the electric self-climbing mechanism, which can be manually controlled and is equipped with an anti-fall device for protection.

[0026] Preferably, a mobile power supply plate is further included, which is suspended below the movable hanging point. When the tailwater inlet door needs to be opened or closed, an electric tool is required to assist in tightening or loosening the bolts to provide power guarantee for the electric tool;

[0027] The power tools are suspended on automatically retractable and fixed cables below the movable lifting points to ensure that the power tools always remain suspended in the air, making it convenient for construction workers to work.

[0028] A method for using a multifunctional mobile integrated platform for a tailwater corridor of a hydropower station comprises the following steps:

[0029] S1. When the unit needs to be overhauled or inspected in the tailwater pipe, the unit needs to be shut down, the upstream and downstream doors need to be lowered, and the tailwater pipe needs to be drained;

[0030] S2. Hoist the assembled multifunctional mobile integrated platform from the powerhouse hall to the tailrace gallery via a bridge crane;

[0031] S3. Turn on the main switch of the multifunctional mobile integrated platform and operate the button to drive the multifunctional mobile integrated platform to the top of the tailwater inlet well of the required maintenance unit;

[0032] S4. Control the width beam and height beam of the multifunctional mobile integrated platform to extend and retract to the appropriate position by operating the corresponding buttons in the control area;

[0033] S5. By operating the corresponding buttons in the control area, control the four sets of support rods of the multifunctional mobile integrated platform to extend and firmly support them on the upstream and downstream walls;

[0034] S6. Lock the driving mechanism of the multifunctional mobile integrated platform and cut off the power supply to prevent malfunction.

[0035] S7. Unfold the retractable pedal on the left side of the multifunctional mobile integrated platform to form a load-bearing platform for temporary passage of personnel and materials.

[0036] S8. Turn on all lighting power sources to provide sufficient lighting for the site;

[0037] S9, lock the fixed position of the movable pulley and connect the movable lifting mechanism;

[0038] S10, after adjusting the relative positions of the movable lifting mechanism and the pulley, locking and fixing the position of the movable lifting mechanism;

[0039] S11. Secure the power supply and electric tools required to open the tailwater entry door with ropes;

[0040] S12, tailwater pipe drainage completed;

[0041] S13. The work permit for opening the tailwater inlet gate is issued and the work is ready to begin;

[0042] S14. Electric-operate the retractable ladder to extend it to the tailwater entry well and lock it;

[0043] S15. Construction workers climb the ladder to the top of the tailwater inlet door at the bottom of the tailwater inlet well;

[0044] S16. Use a self-retractable rope to lower the power tool from the lifting point to assist the construction personnel in loosening the bolts on all tailwater entry doors. Use a manual hoist to open the tailwater entry door and lock the hoist chain.

[0045] S17. Operate the retractable ladder to continue extending downward into the draft tube until it is fully extended and reaches the draft tube floor, then lock the ladder. If rapid access to the draft tube is required, prepare all materials and equipment for the self-climbing mechanism, have personnel wear five-point safety harnesses, and secure the self-climbing mechanism. A worker can manually control the self-climbing mechanism to descend into the draft tube, or someone else can control the self-climbing mechanism by pressing the control buttons in the control area on the operating platform to lower the construction personnel together at a uniform speed into the draft tube.

[0046] S18: Transfer the heavy objects and components on the unit maintenance rack to the multifunctional mobile integrated platform. After they are securely tied and the rope hooks are hung, control the lifting mechanism switch button to retract and release the ropes, and lower the materials into the unit tailwater pipe in sequence to meet the maintenance needs of the unit equipment inside the tailwater pipe.

[0047] S19, maintenance personnel and materials enter and exit the draft tube in sequence through the multifunctional mobile integrated platform;

[0048] S20. After all maintenance work is completed, the materials are hoisted out one by one and transferred to the tailwater corridor to complete the material transfer;

[0049] S21. Close the tailwater disc valve and hoist all personnel out of the tailwater pipe;

[0050] S22, electrically retractable and telescopic access ladder and self-climbing mechanism;

[0051] S23. Secure the power supply, electric tools, bolts, nuts, and sealing accessories required to close the tailwater access door with ropes, and cooperate with construction personnel to close the tailwater access door.

[0052] S24, electric retractable support pole;

[0053] S25. Put away all accessories;

[0054] S26, cover the tailwater inlet gate;

[0055] S27, one-touch operation button controls the multi-functional mobile integrated platform to be folded to the minimum size;

[0056] S28, an electrically controlled multifunctional mobile integrated platform leaves the tailwater and enters the manhole;

[0057] S29, prevention from the corner of the operating platform to the tailwater gallery;

[0058] S30. Disconnect the main switch and provide certain protection for the equipment, and all work is completed.

[0059] Beneficial effects of the present invention:

[0060] 1. Through the effective implementation of the present invention, many pain points and difficulties in the maintenance of tailwater pipe equipment in and out of the tailwater corridor of a hydropower station can be completely solved. This platform integrates a variety of tailwater inlet and outlet equipment, providing a safe, efficient and convenient way for personnel and material equipment to enter and exit the tailwater pipe, thereby completely replacing the original manual method, providing great convenience for the smooth development of this work, and proposing new solutions and plans for promoting the integration and electrification of auxiliary maintenance of hydropower station equipment.

[0061] 2. The present invention has reasonable design and simple operation.

[0062] 3. The present invention can reduce labor intensity and liberate labor.

[0063] 4. The present invention improves the safety of equipment and personnel.

[0064] 5. The present invention can realize multiple options for personnel to enter and exit the tailwater pipe.

[0065] 6. The present invention cooperates better to achieve high efficiency of work.

[0066] 7. The present invention transforms the work from manual labor to electric, lightweight and integrated.

[0067] 8. The platform of the present invention has a high degree of integration and can be used together for multiple tasks.

[0068] 9. The present invention has a simple structure and can realize certain deformation adjustment of size, which is convenient for movement and placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The present invention will be further described below with reference to the accompanying drawings and examples.

[0070] Figure 1 This is an installation location diagram of a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station according to the present invention.

[0071] Figure 2 This is a front view of a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station according to the present invention.

[0072] Figure 3 This is a left view of a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station according to the present invention.

[0073] Figure 4 (a) and (b) are schematic diagrams of the front view and side view of the electric retractable ladder, respectively.

[0074] Figure 5 This is a diagram showing the expansion and usage of a multifunctional mobile integrated platform for the tailwater corridor of a hydropower station according to the present invention.

[0075] Figure 6 This is a schematic diagram of the multifunctional mobile integrated platform for transporting heavy objects.

[0076] Figure 7 This is a schematic diagram of the auxiliary switch tailwater gate of the multifunctional mobile integrated platform of the present invention.

[0077] Figure 8 This is a schematic diagram of the electric operation of the multifunctional mobile integrated platform of the present invention.

[0078] Figure 9 This is a schematic diagram of the manual operation of the multifunctional mobile integrated platform of the present invention.

[0079] Figure 10 This is a schematic diagram of the control area of the multifunctional mobile integrated platform of the present invention.

[0080] Figure: 1. Turbine draft tube, 2. Tailwater gallery, 3. Multifunctional mobile integrated platform, 4. Tailwater inlet door, 5. Tailwater inlet well, 6. Draft tube bottom plate, 7. Tailwater discharge valve;

[0081] 301. Wide beam, 302. High beam, 303. Support rod, 304. Retractable pedal, 305. Motorized drive system, 306. Mobile integrated platform control area, 307. Power supply area, 308. Long beam, 309. Fixed rod, 310. Sliding lifting system, 311. High beam synchronous adjustment mechanism, 312. Retractable ladder set, 313. Removable quick-connect lighting system, 314. Electromagnetic slide locking device, 315. Wide beam synchronous adjustment mechanism, 316. Main slide bar, 317. Secondary slide bar, 318. Movable lifting point, 319. Movable pulley, 320. Small lifting mechanism, 321. Electric self-climbing mechanism, 322. Heavy objects, 323. Mobile power tray, 324. Power tools, 325. Construction personnel, 326. Bolts;

[0082] 3121, suspension connection device, 3122, wire rope, 3123, main ladder, 3124, first auxiliary ladder, 3125, second auxiliary ladder, 3126, limit locking mechanism, 3127, anti-fall system; 306 mobile integrated platform control area, Zone 1, mobile integrated platform main control area switches S1, main switch button, S2, emergency stop button, S3, mobile integrated platform communication button, S4, platform lighting system button, S5, driving wheel forward, S6, driving wheel backward, S7, driving wheel stop, S8, driving system lock, S9, driving wheel left turn, S10, driving wheel right turn; Zone 2, retractable ladder and self-climbing mechanism control area, S11, retractable ladder lifting button, S12, retractable ladder lowering button, S13, retractable ladder stop button, S14, retractable ladder locking button, S15, self-climbing mechanism lifting button, S16 , self-climbing mechanism descending button, S17, self-climbing mechanism stop button, S18, self-climbing mechanism locking button; Zone 3, lifting mechanism control zone, S19, lifting mechanism 1 start button, S20, lifting mechanism 1 stop button, S21, lifting mechanism 1 slow rise button, S22, lifting mechanism 2 slow lowering button, S23, lifting mechanism 1 fast rise button, S24, lifting mechanism 1 fast lowering button, S25, lifting mechanism 2 start button, S26, lifting mechanism 2 stop button, S27, lifting mechanism 2 slow rise button, S28, lifting mechanism 2 slow lowering button, S29, lifting mechanism 2 fast rise button, S30, lifting mechanism 2 fast lowering button; Zone 4, accessory control zone, S31, support extension button, S32, support retraction button, S33, wide beam retraction button, S34, high beam retraction button, S35, one-touch retraction button, T01, LCD display. DETAILED DESCRIPTION

[0083] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0084] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0085] Example 1:

[0086] As shown in Figures 1-10 above:

[0087] See also Figure 1 The turbine tailwater pipe 1, whose main function is to discharge the water flow of the runner into the riverbed to reduce the head loss, is mainly composed of a cavity formed by multi-phase concrete pouring, and is internally provided with a tailwater gallery 2, a tailwater inlet door 4, a tailwater inlet door well 5, a tailwater pipe bottom plate 6 and a tailwater discharge valve 7;

[0088] The tailwater gallery 2 is located above the turbine tailwater pipe 1 and is a horizontal corridor that runs through all units in the power plant building. The tailwater inlet manhole 5 and the tailwater discharge valve 7 operating room are reserved on the ground downward according to the unit position;

[0089] The multifunctional mobile integrated platform 3 is a movable integrated platform composed of multiple components. It is hoisted by a bridge crane into the ground inside the tailwater gallery 2 through the hoisting hole of the hydropower station. It is mainly used for traveling and use on the ground inside the tailwater gallery 2. When in use, it is placed above the tailwater inlet manhole 5 and covers the tailwater inlet manhole 5. After all maintenance work is completed, it can be moved to a position close to the wall of the tailwater gallery 2 for storage without hindering the passage of personnel, or moved out of the tailwater gallery through the hoisting hole and stored separately.

[0090] The tailwater inlet door 4 is a stainless steel circular door of a certain diameter. Its main door shaft is installed on the base of the inlet door hole at the bottom of the tailwater inlet door well 5. It is tightened by a sealing strip and a certain number of bolts and nuts. The tailwater inlet door 4 is required to be free of water seepage and leakage. It is an outward-opening structure. It is opened and fixed at a certain opening by a manual hoist chain to prevent it from slipping.

[0091] The tailwater inlet manhole 5 is a single-unit single-well structure, i.e., one for each unit. Its top is level with the tailwater gallery 2 and is covered with a stainless steel grating to prevent people and objects from falling in. It is about 3 meters deep. A tailwater inlet manhole 4 is installed at its bottom. The foundation of the tailwater inlet manhole is connected to the top of the turbine tailwater pipe 1. When the tailwater drain valve 7 is opened and all the accumulated water in the turbine tailwater pipe 1 is drained, the tailwater inlet manhole 4 is opened, allowing people and materials to enter the turbine tailwater pipe 1 for work.

[0092] The tailwater pipe bottom plate 6 is located at the lowest point inside the turbine tailwater pipe 1 and forms a tailwater drainage channel together with the concrete. Tailwater drainage valves 7 are installed on both sides of the tailwater pipe bottom plate. When the drainage valves are opened, the accumulated water in the turbine tailwater pipe 1 is ensured to be discharged in time without accumulating in the tailwater pipe and affecting personnel and work.

[0093] The tailwater drain valve 7 is installed in the concrete of the turbine tailwater pipe 1. The upper operating room is arranged in the internal support of the tailwater gallery 2. It is symmetrically arranged in two groups on the left and right. After the unit is shut down, the water in the volute is discharged into the tailwater pipe, and then all the accumulated water in the tailwater pipe is discharged from the unit to the maintenance water collection well, thereby ensuring the smooth progress of various work in the tailwater pipe and the safety of personnel and equipment.

[0094] The multifunctional mobile integrated platform 3 is mainly composed of a platform body, four sets of motor drive devices, a power supply and external connection point placement area, a mobile integrated platform control area, a slidable lifting system, a lighting system, a movable hanging point, a retractable ladder and an electric self-climbing mechanism, namely: a wide beam 301, a high beam 302, a support rod 303, a retractable pedal 304, a motor drive system 305, a mobile integrated platform control area 306, a power supply placement area 307, a long beam 308, a fixed rod 309, a slidable lifting system 310, a high beam synchronous adjustment mechanism 311, a retractable ladder set 312, a detachable quick-connect lighting system 313, an electromagnetic slide rail locking device 314, a wide beam synchronous adjustment mechanism 315, a main slide bar 316, an auxiliary slide bar 317, a movable hanging point 318, a movable pulley 319, a small lifting mechanism 320, an electric self-climbing mechanism 321 and a weight 322;

[0095] The platform body is an adjustable frame platform consisting of a wide beam 301, a high beam 302 and a long beam 308. The wide beam 301 is a load-bearing beam, half of which is provided with a sliding track, and the other half is provided with a wide beam adjustment mechanism 315, which can synchronously adjust the telescopic length of the four wide beams.

[0096] The high beam 302 is a load-bearing beam, and a high beam synchronous adjustment mechanism 311 is installed in the middle of the beam to synchronously adjust the telescopic length of the four wide beams. In conjunction with the wide beam synchronous adjustment mechanism 315, the width and height of the entire body can be uniformly adjusted to adapt to the actual application conditions on site.

[0097] The long beam 308 is a load-bearing beam, which together with the wide beam 301 and the high beam 302 constitutes the platform body. The intersection of the three beams is reinforced with reinforcement. The specific connection method and form are not mandatory and limited. Figure 3 In the middle, the long beam 308 has a slidable track for the installation and fixing of the slidable lifting system 310;

[0098] The support rods 303 are of a liftable or retractable structure, installed flush with the top of the high beam 302 and parallel to the high beam 302. If it is a retractable structure, it is arranged on the upper part of the wide beam 301 and adopts a bilaterally symmetrical retractable type, which can achieve synchronous retraction and retraction, and the retractable length is adjustable. When the platform is not in use, the support rods 303 are fixed on the high beam 302. When the platform needs to be used, the support rods 303 can be opened electrically or hydraulically. There are no specific requirements for the specific form and style of the support rods 303 and the retraction method. However, it must be satisfied that the four groups of support rods 303 can simultaneously firmly contact the upstream and downstream walls of the tailwater gallery 2 and provide good support, thereby achieving the purpose of fixing the multifunctional mobile integrated platform 3;

[0099] The retractable pedal 304 is installed with Figure 3 As shown, between the two groups of sorghums on the left and the bottom cross beams, when not in use, it is in a retracted state and fixed between the two sorghums on the left, above the left bottom cross beam, to serve as a fence baffle; when the platform is in use, the retractable pedal 304 is in a lowered state, which is just placed on the two long beams at the bottom, and together with the left bottom cross beam, forms a load-bearing platform for daily personnel and materials to pass through the hole, so as to facilitate personnel to enter and exit the tailwater and enter the manhole 5, thereby preventing personnel from stepping on air and falling;

[0100] The motor drive system 305 is installed on the four pillars at the bottom of the platform. The motor drive system 305 is an independent motor-driven wheel set, which should have its own locking device and steering device. The wheel set is a load-bearing wheel that can carry a certain weight. The front and rear wheel sets are linked and synchronized to drive the multifunctional mobile integrated platform 3 to move forward, backward, stop, lock, turn left, turn right, etc. In the event of a power outage, the four wheel sets can be manually driven without affecting the actual functions of the wheel sets to ensure that the above actions are realized one by one. Its control is connected to the mobile integrated platform control area 306 through button control;

[0101] The mobile integrated platform control area 306 is as follows Figure 10 As shown, it mainly consists of four areas: Area 1, mobile platform control area, Area 2, retractable ladder and self-climbing mechanism control area, Area 3, lifting mechanism control area and Area 4, accessory control area. Each control area independently controls the movement and reset of the equipment in the designated area.

[0102] The power supply area 307 is arranged in the lower right corner between the long beam 308 and the sorghum 302. It is composed of a stacked rechargeable and dischargeable battery assembly, fixed with a rear thin frame structure, and the thickness is basically the same as the width of the long beam 308. An external power line is reserved to charge the power pack when the battery is low on power or to directly connect to the power interface on the external power cabinet. It mainly provides a power source for the multifunctional mobile integrated platform 3.

[0103] The fixed rod 309 is installed between the two sorghums 302 and parallel to the long beam 308. It is a slide rail structure and together with the long beam 308 forms a double slide rail structure for installing and supporting the sliding and locking of various positions of the slidable lifting mechanism 310. Since the fixed rod 309 includes horizontal rods and vertical rods, the specific number is not limited, as long as the slidable lifting mechanism 310 can pass smoothly without obstruction.

[0104] The slidable lifting mechanism 310 is installed between the fixed rod 309 and the long beam 308. It is a form of multiple lifting mechanisms arranged in parallel. It adopts an electric drive mode and has self-locking and anti-fall auxiliary functions. It mainly uses the steel wire rope or rope provided by its own lifting mechanism to pass through the movable lifting point 318 and the movable pulley 319 to achieve the function of lifting and lowering the heavy objects and personnel to be transferred.

[0105] The sorghum synchronous adjustment mechanism 311 is installed in the upper and middle areas of the sorghum 302. Through the four groups of sorghum synchronous adjustment mechanisms 311, the lengths of the four groups of sorghum 302 can be synchronously raised or lowered, thereby realizing the overall height adjustment of the multifunctional mobile integrated platform 3. The sorghum synchronous lifting mechanism 311 should have load-bearing, self-locking, and anti-slip functions. It is a synchronous trapezoidal thread jacking system, but the specific structure and style are not specifically limited. It only needs to meet the above requirements. It can synchronize with the wide beam 315 synchronous adjustment mechanism to achieve action, or it can operate independently.

[0106] The retractable ladder assembly 312 is mounted in the middle of the secondary slide bar 317, with an electromagnetic slide rail locking device 314 on top. It primarily comprises a small lifting mechanism 320, a suspension connection device 3121, a steel wire rope 3122, a main ladder 3123, a first secondary ladder 3124, a second secondary ladder 3125, a limit locking mechanism 3126, and a fall prevention system 3127. It can be electrically retracted and extended for personnel to ascend and descend in and out of the draft tube.

[0107] Among them, one end of the hanging connection device 3121 is installed on the auxiliary slide 317. It should be firmly connected to the slide rail of the auxiliary slide 317 without falling off and can be locked in position. It is the entire load-bearing connection component of the entire telescopic ladder set 312;

[0108] One end of the steel wire rope 3122 is fixed to the end of the second auxiliary ladder 3125 of the retractable ladder set 312, and the other end is led out from the small lifting mechanism 320, so as to realize the electric extension and retraction function of the retractable ladder set 312;

[0109] The upper portion of the main ladder 3123 is connected to the suspension connection device 3121, and a slide rail is reserved on the main ladder to cooperate with the first auxiliary ladder 3124;

[0110] The first auxiliary ladder 3124 is inserted into the slide rail on the main ladder 3123 so that the first auxiliary ladder 3124 can slide up and down the main ladder 3123. The upper portion of the first auxiliary ladder 3124 also has a slide rail reserved thereon to cooperate with the second auxiliary ladder 3125.

[0111] The second auxiliary ladder 3125 is inserted into the slide rail on the first auxiliary ladder 3124 so that the second auxiliary ladder 3125 can slide up and down on the first auxiliary ladder 3124. A hook is installed on the top of the second auxiliary ladder to connect with the wire rope 3122.

[0112] The limit locking mechanism 3126 is respectively installed at the bottom of the main ladder 3123 and the bottom of the first auxiliary ladder 3124, and is used to limit the travel of the telescopic ladder set 312 when it is telescoping, so that each ladder section will not fall off the slide rail and cause a safety hazard. The limit locking mechanism 3126 is a load-bearing limit mechanism;

[0113] The anti-fall system 3127 is installed on the top of the second auxiliary ladder 3125, and its anti-fall lead is suspended on the movable hanging point on the auxiliary slide bar 317, thereby protecting the retractable ladder set 312.

[0114] The detachable quick-connect lighting system 313 is installed inside the multifunctional mobile integrated platform 3. It mainly relies on the magnetic cables arranged at each corner of the multifunctional mobile integrated platform 3 to illuminate the entire platform, the draft tube entry door 5, and the part of the turbine draft tube 1 that is illuminated through the draft tube entry door 4. It has the functions of detachability, quick connection, and adjustable light brightness, realizing on-site lighting.

[0115] The electromagnetic slide rail locking device 314 is mainly installed on each sliding rail to lock each rail and prevent it from moving. There are no specific requirements for its specific form and style.

[0116] The wide beam synchronous adjustment mechanism 315 is installed in the upper and middle area of the wide beam 301. Through the four sets of wide beam synchronous adjustment mechanisms 315, the lengths of the four sets of wide beams 301 can be synchronously raised or lowered, thereby realizing the overall width adjustment of the multifunctional mobile integrated platform 3. The wide beam synchronous lifting mechanism 315 should have load-bearing, self-locking, and anti-slip functions. It is a synchronous trapezoidal thread jacking system, but the specific structure and style are not specifically limited. It only needs to meet the above requirements. It can synchronize with the high beam synchronous adjustment mechanism 311 to achieve action, or it can operate independently.

[0117] The main slide bar 316 is installed on the two sets of wide beams 301 at the top and slides within a certain position of the wide beam 301. It is a load-bearing rod, and its two ends are locked and fixed by electromagnetic slide rail locking devices 314 to prevent improper movement, thereby realizing the position adjustment of the hanging point on the main slide bar 316;

[0118] The auxiliary slide bar 317 is installed on the two groups of wide beams 301 at the top and slides within a certain position of the wide beam 301. It is a load-bearing rod, and its two ends are locked and fixed by electromagnetic slide rail locking devices 314 to prevent improper movement. It is arranged parallel to the main slide bar 316, and the upper part is equipped with a retractable ladder set 312, a small lifting mechanism 320, an electromagnetic slide rail locking device 314 and a movable hanging point 318. Each installation accessory can realize the self-locking function;

[0119] The movable hanging point 318 is installed on the main slide bar 316 and the auxiliary slide bar 317. It can bear weight and has a fixed locking function, providing a reliable hanging point for various anti-fall protection devices, objects, lamps and other items such as the electric self-climbing mechanism 321;

[0120] The movable pulley 319 is installed on the main slide bar 316. It can bear weight and has a fixed locking function. At the same time, it is used to change the direction and support the steel wire rope of the slidable lifting system 310. The movable pulley should be flexible and non-blocking. The number of movable pulleys should be more than two groups, and the specific number can be increased or decreased according to the actual needs of the site.

[0121] The small lifting mechanism 320 is installed on the top of the retractable ladder set 312 on the secondary slide 317. A small electric lifting mechanism is installed inside the small lifting mechanism, which can extend a cable to suspend the end of the second secondary ladder 3125 to realize the electric and remote control retraction and extension of the retractable ladder set 312.

[0122] The electric self-climbing mechanism 321 is suspended under the movable suspension point 318 on the main slide bar 316. When the construction personnel 325 need to enter the tailwater pipe for work electrically, instead of manually entering through the retractable ladder set 312, the automatic climbing mechanism 321 can be used to realize the personnel's electric entry and exit of the tailwater pipe; a five-point safety belt is suspended below the electric self-climbing mechanism 321. After the personnel put on the safety belt, they connect to the electric self-climbing mechanism 321 and can manually control the extension and retraction of the self-climbing mechanism or control the self-climbing mechanism through the control area. The self-climbing mechanism is equipped with an anti-fall device for protection;

[0123] The heavy objects 322 are materials required for various tasks in the turbine tailwater tube 1, heavy objects such as the unit maintenance rack components, etc., which are retracted and extended electrically instead of manually;

[0124] The mobile power supply plate 323 is suspended below the movable suspension point 318. When the tailwater entry door 4 needs to be opened or closed, an electric tool 324 is needed to assist in tightening or loosening the bolt 326. It mainly provides power for the electric tool 324 and its height can be adjusted.

[0125] The power tool 324 is suspended on an automatically retractable and fixed cable below the movable suspension point 318 to ensure that the power tool 324 is always suspended in the air to facilitate the work of the construction worker 325;

[0126] The construction personnel 325 mentioned above mainly refer to the personnel involved in opening and closing the tailwater inlet door and entering and exiting the tailwater pipe on site;

[0127] The bolts 326 are installed on the base of the tailwater inlet door 4, and are used to seal the tailwater inlet door 4 to prevent the river water in the tailwater pipe from flowing out, forming a closed space;

[0128] The mobile platform master control area in zone 1 of the mobile integrated platform control area 306 includes: switch buttons S1-S10. The functions of each button and the left and right buttons are temporarily arranged according to this plan, and can be increased or decreased without specific restrictions;

[0129] The S1 main switch button controls the total power supply of the entire multifunctional mobile integrated platform 3, including the power supply of the power supply area 307 and the external point, which can realize the battery function or directly connect to the external circuit power supply to take power;

[0130] The S2 emergency stop button is used for the emergency stop function of all units of the multifunctional mobile integrated platform 3;

[0131] The S3 mobile integrated platform communication button is mainly used to process and control the communication of the internal units of the multifunctional mobile integrated platform 3 and the on-site wireless connection communication. It can control the signal generator receiver and Bluetooth device installed on the mobile integrated platform for communication between various communication devices;

[0132] The S4 platform lighting system button is responsible for controlling the switch of the detachable quick-connect lighting system 313 in the multifunctional mobile integrated platform 3, which is used for lighting the on-site work surface;

[0133] The S5 driving wheel moves forward, controlling the motor drive system 305 to drive the wheel set forward;

[0134] The S6 driving wheel moves backward, controlling the motor driving system 305 to drive the wheel set backward;

[0135] The S7 driving wheel stops, controlling the motor drive system 305 to stop the driving wheel set;

[0136] The S8 drive system is locked, which controls the locking function of the drive wheel set of the motor drive system 305. After locking, the multifunctional mobile integrated platform 3 will be in a stationary state and cannot deviate or move;

[0137] The S9 driving wheel turns left, controlling the motor drive system 305 to drive the wheel assembly to turn left;

[0138] The S10 driving wheel turns right, controlling the motor drive system 305 to drive the wheel assembly to turn right;

[0139] The 2-zone retractable ladder and self-climbing mechanism control area in the mobile integrated platform control area 306 includes: switch buttons S11-S18, which control the retractable ladder and self-climbing mechanism;

[0140] The S11 retractable ladder lifting button controls the folding of the retractable ladder;

[0141] The S12 retractable ladder descending button controls the unfolding of the retractable ladder;

[0142] The S13 retractable ladder stop button controls the retractable ladder to stop, pause, or hover;

[0143] The S14 retractable ladder locking button controls the retractable ladder to lock and stop;

[0144] The S15 self-climbing mechanism lifting button controls the self-climbing mechanism to rise from the bottom of the tailwater pipe;

[0145] The S16 self-climbing mechanism descending button controls the self-climbing mechanism to descend and deploy toward the bottom of the tailwater pipe;

[0146] The S17 self-climbing mechanism stop button controls the self-climbing mechanism to stop;

[0147] The S18 self-climbing mechanism locking button controls the locking state of the self-climbing mechanism;

[0148] The lifting mechanism control area in the mobile integrated platform control area 306 includes switch buttons S19-24 for controlling the action of lifting mechanism 1; switch buttons S25-30 for controlling the action of lifting mechanism 2;

[0149] The S19 lifting mechanism 1 start button is used to control the start of the lifting mechanism 1;

[0150] The S20 lifting mechanism 1 stop button is used to control the lifting mechanism 1 to stop;

[0151] The S21 lifting mechanism 1 slow lifting button is used to control the slow lifting action of the lifting mechanism 1;

[0152] The S22 lifting mechanism 2 slow-down button is used to control the slow-down action of the lifting mechanism 1;

[0153] The S23 lifting mechanism 1 quick lifting button is used to control the quick lifting action of the lifting mechanism 1;

[0154] The S24 lifting mechanism 1 quick lowering button is used to control the quick lowering action of the lifting mechanism 1;

[0155] The S25 lifting mechanism 2 start button is used to control the start of the lifting mechanism 2;

[0156] The S26 lifting mechanism 2 stop button is used to control the lifting mechanism 2 to stop;

[0157] The S27 lifting mechanism 2 slow lifting button is used to control the slow lifting action of the lifting mechanism 2;

[0158] The S28 lifting mechanism 2 slow-down button is used to control the slow-down action of the lifting mechanism 2;

[0159] The S29 lifting mechanism 2 quick lifting button is used to control the quick lifting action of the lifting mechanism 2;

[0160] The S30 lifting mechanism 2 quick-descent button is used to control the quick-descent action of the lifting mechanism 2;

[0161] The 4-zone accessory control area in the control area of the mobile integrated platform 306 includes: switch buttons S31-35 and liquid crystal display screen and other components for realizing the operation of auxiliary accessories;

[0162] The S31 support rod extension button is used to control the synchronous extension of the four groups of support rods 303 to fix the multifunctional mobile integrated platform 3;

[0163] The S32 support rod retraction button is used to control the synchronous retraction of the four groups of support rods 303;

[0164] The S33 wide beam retraction button is used to control the retraction and extension of the four sets of wide beam synchronization adjustment mechanisms 315 to different lengths;

[0165] The S34 sorghum retraction and extension button is used to control the retraction and extension of the four sorghum synchronization adjustment mechanisms 311 at different lengths;

[0166] The S35 one-touch retraction button is used to control the multi-stroke retraction and extension adjustment of all sorghum synchronous adjustment mechanisms 311 and all wide beam synchronous adjustment mechanisms 315 with one button;

[0167] The T01 LCD screen is connected to the multifunctional mobile integrated platform 3 and has the function of real-time display of various data display platforms and data information.

[0168] The equipment and functional scope presented and proposed in this patent are intended as directional goals, and no specific limitations or descriptions are made in the details.

[0169] like Figure 8-9As shown, this patent can realize both electric and manual operations. When the power is energized, the equipment can perform all electric operations. When the power is off, it can also be used as a primitive manual method to drive and operate each working unit without affecting the normal use of each work unit, thereby coping with the use of this patent in different situations.

[0170] Example 2:

[0171] A method for using a multifunctional mobile integrated platform for a tailwater corridor of a hydropower station is characterized by comprising the following steps:

[0172] S1. When the unit needs to be overhauled or inspected in the tailwater pipe, the unit needs to be shut down, the upstream and downstream doors need to be lowered, and the tailwater pipe needs to be drained;

[0173] S2. Hoist the assembled multifunctional mobile integrated platform from the powerhouse hall to the tailrace gallery via a bridge crane;

[0174] S3. Turn on the main switch of the multifunctional mobile integrated platform and operate the button to drive the multifunctional mobile integrated platform to the top of the tailwater inlet well of the required maintenance unit;

[0175] S4. Control the width beam and height beam of the multifunctional mobile integrated platform to extend and retract to the appropriate position by operating the corresponding buttons in the control area;

[0176] S5. By operating the corresponding buttons in the control area, control the four sets of support rods of the multifunctional mobile integrated platform to extend and firmly support them on the upstream and downstream walls;

[0177] S6. Lock the driving mechanism of the multifunctional mobile integrated platform and cut off the power supply to prevent malfunction.

[0178] S7. Unfold the retractable pedal on the left side of the multifunctional mobile integrated platform to form a load-bearing platform for temporary passage of personnel and materials.

[0179] S8. Turn on all lighting power sources to provide sufficient lighting for the site;

[0180] S9, lock the fixed position of the movable pulley and connect the movable lifting mechanism;

[0181] S10, after adjusting the relative positions of the movable lifting mechanism and the pulley, locking and fixing the position of the movable lifting mechanism;

[0182] S11. Secure the power supply and electric tools required to open the tailwater entry door with ropes;

[0183] S12, tailwater pipe drainage completed;

[0184] S13. The work permit for opening the tailwater inlet gate is issued and the work is ready to begin;

[0185] S14. Electric-operate the retractable ladder to extend it to the tailwater entry well and lock it;

[0186] S15. Construction workers climb the ladder to the top of the tailwater inlet door at the bottom of the tailwater inlet well;

[0187] S16. Use a self-retractable rope to lower the power tool from the lifting point to assist the construction personnel in loosening the bolts on all tailwater entry doors. Use a manual hoist to open the tailwater entry door and lock the hoist chain.

[0188] S17. Operate the retractable ladder to continue extending downward into the draft tube until it is fully extended and reaches the draft tube floor, then lock the ladder. If rapid access to the draft tube is required, prepare all materials and equipment for the self-climbing mechanism, have personnel wear five-point safety harnesses, and secure the self-climbing mechanism. A worker can manually control the self-climbing mechanism to descend into the draft tube, or someone else can control the self-climbing mechanism by pressing the control buttons in the control area on the operating platform to lower the construction personnel together at a uniform speed into the draft tube.

[0189] S18: Transfer the heavy objects and components on the unit maintenance rack to the multifunctional mobile integrated platform. After they are securely tied and the rope hooks are hung, control the lifting mechanism switch button to retract and release the ropes, and lower the materials into the unit tailwater pipe in sequence to meet the maintenance needs of the unit equipment inside the tailwater pipe.

[0190] S19, maintenance personnel and materials enter and exit the draft tube in sequence through the multifunctional mobile integrated platform;

[0191] S20. After all maintenance work is completed, the materials are hoisted out one by one and transferred to the tailwater corridor to complete the material transfer;

[0192] S21. Close the tailwater disc valve and hoist all personnel out of the tailwater pipe;

[0193] S22, electrically retractable and telescopic access ladder and self-climbing mechanism;

[0194] S23. Secure the power supply, electric tools, bolts, nuts, and sealing accessories required to close the tailwater access door with ropes, and cooperate with construction personnel to close the tailwater access door.

[0195] S24, electric retractable support pole;

[0196] S25. Put away all accessories;

[0197] S26, cover the tailwater inlet gate;

[0198] S27, one-touch operation button controls the multi-functional mobile integrated platform to be folded to the minimum size;

[0199] S28, an electrically controlled multifunctional mobile integrated platform leaves the tailwater and enters the manhole;

[0200] S29, prevention from the corner of the operating platform to the tailwater gallery;

[0201] S30. Disconnect the main switch and provide certain protection for the equipment, and all work is completed.

Claims

1. A multifunctional mobile integrated platform for tailwater corridor of hydropower station, characterized by: The multifunctional mobile integrated platform (3) comprises a platform body, wherein the bottom four corners of the platform body are provided with a motor drive system (305) for driving the entire platform body to move, and the top of the platform body is provided with a parallel main slide bar (316) and a secondary slide bar (317); a retractable ladder set (312) for manual climbing is provided on the secondary slide bar (317); a slidable lifting system (310) is slidably provided on the front side of the platform body, and a traction rope of the slidable lifting system (310) selectively passes around a movable hanging point (318) or a movable pulley (319) on the main slide bar (316); a mobile integrated platform control area (306) is provided on the front side of the platform body; and a small lifting mechanism (320) is provided on the secondary slide bar (317); The platform body comprises a vertically arranged high beam (302), and the two high beams (302) located at the front and rear sides are fixedly connected at both ends by a long beam (308); A retractable pedal (304) is rotatably mounted between the two groups of high beams (302) on the left and the wide beam (301) at the bottom; A fixed rod (309) is installed between the two high beams (302) on the front side, and a double slide rail structure is formed between the fixed rod (309) and the long beam (308) at the bottom of the corresponding side, and is used to slide and support the slidable lifting system (310); The retractable ladder set (312) is installed in the middle of the auxiliary slide bar (317), and an electromagnetic slide rail locking device (314) is provided on the top; The ends of the main slide bar (316) and the auxiliary slide bar (317) that are slidably matched with the wide beam (301) are installed with electromagnetic slide rail locking devices (314).

2. A multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 1, characterized in that: The two high beams (302) on the left and right sides are fixedly connected at both ends by a wide beam (301), and foldable and telescopic support rods (303) are symmetrically hinged on both sides of the top of the high beam (302); The high beam (302) adopts a telescopic structure and is equipped with a high beam synchronous adjustment mechanism (311) to adjust the height of the entire platform body; The wide beam (301) adopts a telescopic structure and is equipped with a wide beam synchronous adjustment mechanism (315) to adjust the width of the entire platform body.

3. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: When the platform is in use, the retractable pedal (304) is in a lowered state and supported on the two long beams (308) at the bottom, forming a load-bearing platform together with the wide beam (301) at the bottom on the left side; when the platform is not in use, the retractable pedal (304) is in a retracted state and fixed between the two high beams (302) on the left side and on the wide beam (301) at the bottom, serving as a fence baffle.

4. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: The four corners of the inner top of the platform body are cooperatively mounted with a detachable quick-connect lighting system (313), and the detachable quick-connect lighting system (313) is used for internal lighting of the entire platform, the tailwater pipe entry well (5), the tailwater entry door (4), and the turbine tailwater pipe (1).

5. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: The motor drive system (305) is an independent motor-driven wheel set. The motor drive system (305) is provided with a locking device and a steering device. The wheel set is a load-bearing wheel that can carry a certain weight. The front and rear wheel sets are linked and synchronized to drive the multifunctional mobile integrated platform (3) to move forward, backward, stop, lock, turn left, and turn right. The motor drive system (305) is connected to the mobile integrated platform control area (306) and is controlled by buttons.

6. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: The mobile integrated platform control area (306) includes a mobile platform master control area, a retractable ladder and self-climbing mechanism control area, a lifting mechanism control area, and an accessory control area; A power supply placement area (307) is provided below the mobile integrated platform control area (306), and the power supply placement area (307) is provided in the lower right corner area between the long beam (308) and the high beam (302), and is composed of a stacked rechargeable and dischargeable battery assembly, fixed with a rear thin frame structure, and a reserved external power line for charging the battery pack when the battery is out of power or directly connected to a power interface on an external power supply cabinet, thereby providing a power source for the multifunctional mobile integrated platform (3).

7. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: The slidable lifting system (310) is in the form of multiple lifting mechanisms arranged in parallel, adopts an electric drive mode, and has self-locking and anti-fall auxiliary functions. Through the steel wire rope or rope provided by its own lifting mechanism, it passes through the movable lifting point (318) and the movable pulley (319) to achieve lifting and lowering of the heavy objects and personnel required to be transferred.

8. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: The retractable ladder set (312) includes a small lifting mechanism (320), a suspension connection device (3121), a steel wire rope (3122), a main ladder (3123), a first auxiliary ladder (3124), a second auxiliary ladder (3125), a limit locking mechanism (3126) and a fall prevention system (3127); One end of the suspension connection device (3121) is mounted on the auxiliary slide bar (317) and is firmly connected to the slide rail on the auxiliary slide bar (317) without falling off and can be locked in position; One end of the steel wire rope (3122) is fixed to the end of the second auxiliary ladder (3125) of the retractable ladder set (312), and the other end is led out from the small lifting mechanism (320) and can realize the electric extension and retraction of the retractable ladder set (312); The upper portion of the main ladder (3123) is connected to the suspension connection device (3121), and a slide rail is reserved on the main ladder to cooperate with the first auxiliary ladder (3124); The first auxiliary ladder (3124) is inserted through the slide rail on the main ladder (3123), so that the first auxiliary ladder (3124) can slide up and down on the main ladder (3123). The upper part of the first auxiliary ladder (3124) is also reserved with a slide rail to cooperate with the second auxiliary ladder (3125); The second auxiliary ladder (3125) is inserted through the slide rail on the first auxiliary ladder (3124), so that the second auxiliary ladder (3125) can slide up and down on the first auxiliary ladder (3124), and a hook hanging point is installed on the top to connect with the wire rope (3122); The limit locking mechanism (3126) is respectively installed at the bottom of the main ladder (3123) and the bottom of the first auxiliary ladder (3124), and is used to limit the travel when the retractable ladder set (312) is performing a retracting action; The anti-fall system (3127) is installed on the top of the second auxiliary ladder (3125), and its anti-fall lead is suspended on the mobile hanging point on the auxiliary slide bar (317).

9. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: The electric self-climbing mechanism (321) is suspended under the movable hanging point (318) on the main slide bar (316). When the construction personnel (325) need to enter the tailwater pipe electrically to work, instead of manually entering through the retractable ladder set (312), the electric self-climbing mechanism (321) is used to realize the personnel's electric entry and exit of the tailwater pipe; a five-point safety belt is suspended below the electric self-climbing mechanism (321). After the personnel wear the safety belt, they connect to the electric self-climbing mechanism (321) and can manually control the electric self-climbing mechanism (321). The electric self-climbing mechanism (321) is also provided with an anti-fall device for protection.

10. The multifunctional mobile integrated platform for tailwater corridor of a hydropower station according to claim 2, characterized in that: It also includes a mobile power supply disk (323), which is suspended below the movable hanging point (318). When the tailwater inlet door (4) needs to be opened or closed, an electric tool (324) is required to assist in tightening or loosening the bolt (326), providing power protection for the electric tool (324); The electric tool (324) is suspended on an automatically retractable and fixed cable below the movable suspension point (318) to ensure that the electric tool (324) is always suspended in the air to facilitate the work of the construction personnel (325).

11. A method for using the multifunctional mobile integrated platform for the tailwater corridor of a hydropower station according to any one of claims 1 to 10, characterized in that: The following steps are involved: S1. When the unit needs to be overhauled or inspected in the tailwater pipe, the unit needs to be shut down, the upstream and downstream doors need to be lowered, and the tailwater pipe needs to be drained; S2. Hoist the assembled multifunctional mobile integrated platform from the powerhouse hall to the tailrace gallery via a bridge crane; S3. Turn on the main switch of the multifunctional mobile integrated platform and operate the button to drive the multifunctional mobile integrated platform to the top of the tailwater inlet well of the required maintenance unit; S4. Control the width beam and height beam of the multifunctional mobile integrated platform to extend and retract to the appropriate position by operating the corresponding buttons in the control area; S5. By operating the corresponding buttons in the control area, control the four sets of support rods of the multifunctional mobile integrated platform to extend and firmly support them on the upstream and downstream walls; S6. Lock the driving mechanism of the multifunctional mobile integrated platform and cut off the power supply to prevent malfunction. S7. Unfold the retractable pedal on the left side of the multifunctional mobile integrated platform to form a load-bearing platform for temporary passage of personnel and materials. S8. Turn on all lighting power sources to provide sufficient lighting for the site; S9, lock the fixed position of the movable pulley and connect the movable lifting mechanism; S10, after adjusting the relative positions of the movable lifting mechanism and the pulley, locking and fixing the position of the movable lifting mechanism; S11. Secure the power supply and electric tools required to open the tailwater entry door with ropes; S12, tailwater pipe drainage completed; S13. The work permit for opening the tailwater inlet gate is issued and the work is ready to begin; S14. Electric-operate the retractable ladder to extend it to the tailwater entry well and lock it; S15. Construction workers climb the ladder to the top of the tailwater inlet door at the bottom of the tailwater inlet well; S16. Use a self-retractable rope to lower the power tool from the lifting point to assist the construction personnel in loosening the bolts on all tailwater entry doors. Use a manual hoist to open the tailwater entry door and lock the hoist chain. S17. Operate the retractable ladder to continue extending downward into the draft tube until it is fully extended and reaches the draft tube floor, then lock the ladder. If rapid access to the draft tube is required, prepare all materials and equipment for the self-climbing mechanism, have personnel wear five-point safety harnesses, and secure the self-climbing mechanism. A worker can manually control the self-climbing mechanism to descend into the draft tube, or someone else can control the self-climbing mechanism by pressing the control buttons in the control area on the operating platform to lower the construction personnel together at a uniform speed into the draft tube. S18: Transfer the heavy objects and components on the unit maintenance rack to the multifunctional mobile integrated platform. After they are securely tied and the rope hooks are hung, control the lifting mechanism switch button to retract and release the ropes, and lower the materials into the unit tailwater pipe in sequence to meet the maintenance needs of the unit equipment inside the tailwater pipe. S19, maintenance personnel and materials enter and exit the draft tube in sequence through the multifunctional mobile integrated platform; S20. After all maintenance work is completed, the materials are hoisted out one by one and transferred to the tailwater corridor to complete the material transfer; S21. Close the tailwater disc valve and hoist all personnel out of the tailwater pipe; S22, electrically retractable and telescopic access ladder and self-climbing mechanism; S23. Secure the power supply, electric tools, bolts, nuts, and sealing accessories required to close the tailwater access door with ropes, and cooperate with construction personnel to close the tailwater access door. S24, electric retractable support pole; S25. Put away all accessories; S26, cover the tailwater inlet gate; S27, one-touch operation button controls the multi-functional mobile integrated platform to be folded to the minimum size; S28, an electrically controlled multifunctional mobile integrated platform leaves the tailwater and enters the manhole; S29, prevention from the corner of the operating platform to the tailwater gallery; S30. Disconnect the main switch and provide certain protection for the equipment, and all work is completed.

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