A device and method for repairing a canal bottom lining plate in a water conveying state

Abstract

A kind of canal bottom lining plate repair device and method under water conveying state, repair device includes platform, water retaining device, hoisting device, lifting device, traction winch and control system, the platform is horizontally arranged on water surface, the traction winch is set up in the two banks of water channel and output end is connected with the platform, the center of the platform is provided with mounting hole, the upper side of the platform is provided with the storage area for accommodating lining plate, the hoisting device, lifting device, control system are respectively installed in the upper side of the platform, the water retaining device is U-shaped, the opening of the water retaining device is towards with the same direction as the flow direction in water channel, the output end of the lifting device is connected to the upper side of the water retaining device after passing through the platform, the hoisting device, lifting device, traction winch are connected with the control system respectively.The design is not only higher safety, higher repair efficiency, but also higher stability, easy to operate.

Description

Technical Field

[0001] This invention relates to the field of channel lining repair technology, and in particular to a device and method for repairing channel bottom lining plates under water conveyance conditions. Background Technology

[0002] The South-to-North Water Diversion Project's central route is responsible for supplying water to residents and industries in large and medium-sized cities. Due to complex geological conditions, high groundwater levels, floods, and frost heave, the canal linings experience varying degrees of cracking, bulging, and collapse, affecting water supply efficiency and security. Furthermore, with increasing water demand from cities along the route, the requirements for continuous water supply from the central route are becoming increasingly stringent. Therefore, maintenance and repair of the linings can only be carried out during water transport. With the arrival of high-water seasons, some sections of the canal linings may be damaged. Since large-scale repairs are not necessary, divers are typically deployed to repair the damaged linings underwater. Each lining panel measures 4m x 4m and weighs approximately 3.6 tons. The current repair plan involves dividing the lining panel into four smaller 2m x 2m pieces and having divers assemble them underwater. However, the following problems arise during the repair process:

[0003] The water flow velocity in the canal can reach up to 1.1 m / s, and the water depth is 7 m. When divers work underwater, they are affected by the impact of the moving water flow and eddies, making it difficult for them to stand steadily, which poses a safety hazard. When repairing the bottom of the canal, the distance between the bottom of the canal and the bank is too far (up to 40 m). The on-site construction crane cannot reach the required position due to the width of the canal bank. Therefore, it is necessary to lift the lining plate onto a floating body in the middle of the canal, and then pull the floating body to the repair position from the bank. The crane on the floating body then lifts the lining plate to the bottom of the canal. In this process, repairing one lining plate requires at least three round trips between the floating body and the bank to transport the lining plate. Moreover, the floating body is unstable due to the water flow. The personnel lifting on the floating body cannot directly observe the precise position of the divers at the bottom of the canal, which requires constant adjustments. This results in long operation time and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects and problems of poor safety and low repair efficiency in the existing technology of channel bottom lining plate repair, and to provide a channel bottom lining plate repair device and method with higher safety and repair efficiency under water conveyance conditions.

[0005] To achieve the above objectives, the technical solution of the present invention is: a channel bottom lining plate repair device under water conveyance conditions, including a platform, a water blocking device, a lifting device, a hoisting device, a traction winch and a control system. The platform is horizontally arranged on the water surface. The traction winch is set on both banks of the water channel and its output end is connected to the platform. An installation hole is opened at the center of the platform. A storage area for accommodating the lining plate is set on the upper side of the platform. The lifting device, the hoisting device and the control system are respectively installed on the upper side of the platform. The water blocking device is U-shaped. The opening of the water blocking device faces the same direction as the water flow in the water channel (1). The output end of the hoisting device passes through the platform and is connected to the upper side of the water blocking device. The lifting device, the hoisting device and the traction winch are respectively connected to the control system.

[0006] The lifting device is used to lift the lining plate and lower it from the mounting hole of the platform to the bottom of the canal;

[0007] The lifting device is used to move the water-blocking device to the lining plate at the bottom of the water channel;

[0008] The control system is used to control the operation of the traction winch to move the platform and make it float horizontally on the water surface, control the lifting, moving and lowering of the hoisting device, and control the operation of the lifting device to drive the water-blocking device to move up and down.

[0009] The platform includes a pontoon, an extension plate, a kick plate, and a guardrail. The extension plate is connected to one side of the pontoon and has the storage area on its upper side. The pontoon has a mounting hole in its center. The kick plate surrounds the outer periphery of the mounting hole and is connected to the upper side of the pontoon. The guardrail surrounds the outer periphery of the kick plate and is connected to the upper side of the pontoon.

[0010] The water-blocking device includes a U-shaped box, which is horizontally arranged. The opening of the U-shaped box faces the same direction as the water flow in the channel. A water pump and an air pump are installed on the U-shaped box and the float box. The interior of the U-shaped box and the float box is hollow. An air inlet and an air outlet are opened on the upper side of the U-shaped box and the float box. An air inlet and a drain outlet are opened on the lower side of the U-shaped box and the float box. A valve is installed in the air inlet and the air outlet. The water pump is connected to the air inlet and the drain outlet. The air pump is connected to the air inlet and the air outlet. The valves, the air pump, and the water pump are connected to the control system.

[0011] The air pump is used to inject air into the U-shaped box and the floating box;

[0012] The water pump is used to pump water from the canal into the U-shaped box and the float box;

[0013] The control system is used to control the opening and closing of valves and to control the operation of air pumps and water pumps.

[0014] The water-blocking device also includes a rubber plate and a pressure sensor. The rubber plate is connected to the lower side of the U-shaped box, and the pressure sensor is connected to the lower side of the rubber plate. The pressure sensor is connected to the control system.

[0015] The lifting device includes a track, pulleys, a support, a hanger, a crane, and a hydraulic thruster. The pulleys are connected to the lower side of the support and are rotatably connected to the track. The hydraulic thruster is connected to the lower side of the support and its output end is connected to the pulleys. The hanger is horizontally connected to the upper side of the support. The crane is connected to the lower side of the hanger and is arranged relative to the storage area. The hydraulic thruster and the crane are connected to the control system.

[0016] The lifting device includes four legs, each hollow inside with an open top. The four legs are slidably connected to the platform in a vertical direction. The lower ends of the four legs are all connected to the upper side of the water-blocking device. Racks are connected to the outer sides of the four legs. Four mounting brackets are installed on the upper side of the platform. A drive motor is connected to one side of each of the four mounting brackets. Gears are connected to the output ends of the four drive motors. The four gears are respectively meshed with the four racks. The four drive motors are respectively connected to the control system.

[0017] The number of traction winches is four, and the four traction winches are symmetrically arranged on both banks of the canal. The output ends of the four traction winches are respectively connected to the four vertices of the platform, and the control system is connected to the four traction winches.

[0018] A method for repairing channel bottom lining slabs under water conveyance conditions, the method being applied to a channel bottom lining slab repair device under water conveyance conditions, the method comprising the following steps:

[0019] S1. The repair device is lifted into the canal by a crane. Then, traction winches are set up on both sides of the canal and connected to the platform. The control system controls the traction force of the traction winches to keep the platform in a horizontal state. Then, the small lining plate required to repair a lining plate is lifted by the crane to the storage area on the platform. Then, the control system controls the traction force of the traction winches to pull the platform directly above the lining plate to be repaired.

[0020] S2. The control system controls the traction force of the winch to adjust the direction of the platform so that the back surface of the water-blocking device faces the direction of the water flow. Then the control system controls the lifting device to work, so that the water-blocking device sinks to the lining plate at the bottom of the canal. Then the control system controls the lifting device to stop working. At this time, the internal space of the water-blocking device completely covers the lining plate that needs to be repaired.

[0021] S3. Once the platform is stable, the operator standing on the platform uses the lifting device to lift the lining plate from the storage area and lower it through the platform's installation hole to the bottom of the canal. At the bottom of the canal, divers use frogmen to align and install the lining plate, completing the lining plate repair work.

[0022] The specific steps of step S2 are as follows:

[0023] S21. The control system controls the valves in the inlet and outlet holes on the float box to open, and at the same time controls the water pump on the float box to work and inject water into the float box. When the draft of the float box reaches the set depth, the control system controls the valve to close and controls the water pump to stop working. Then the control system controls the traction force of the traction winch to adjust the direction of the float box so that the outer top wall of the U-shaped box faces the direction of water flow.

[0024] S22. The control system controls the lifting device to work, causing the water-blocking device to sink. At the same time, the control system opens the valves in the air inlet and outlet holes on the float box and the valves in the water inlet and outlet holes on the U-shaped box. Then, the control system controls the water pump on the U-shaped box to work to inject water into the U-shaped box and the air pump on the float box to work to pump the water in the float box into the water channel, so that the repair device is in a buoyancy balance state. When the U-shaped box is full of water, the control system closes the valves in the air inlet and outlet holes on the float box and the valves in the water inlet and outlet holes on the U-shaped box. At the same time, the control system stops the water pump on the U-shaped box and the air pump on the float box, so that the water-blocking device continues to sink.

[0025] S23. The water-blocking device sinks to the lining plate at the bottom of the canal, and the control system controls the lifting device to stop working. At this time, the internal space of the water-blocking device completely covers the lining plate that needs to be repaired.

[0026] In steps S22 and S23, the specific steps for the water-blocking device to sink to the bottom of the channel are as follows:

[0027] The control system controls the lifting device to lower the water-blocking device and reads the pressure sensor reading. When the pressure in the pressure sensor suddenly increases, the bottom of the water-blocking device contacts the lining plate to be repaired. The control system then controls the lifting device to slow down the descent speed and maintains the pressure in the pressure sensor within the set range. Finally, the control system stops the lifting device.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. In the present invention, a device and method for repairing channel lining slabs under water conveyance conditions, a water-blocking device is designed in the repair area of ​​the channel lining slab to reduce the water flow velocity and the influence of vortices, thereby ensuring operational safety. Simultaneously, the lifting mode is used for operation, which is convenient and quick, enabling rapid positioning. A lifting device and a storage area for the lining slabs are installed above the platform, allowing the lining slabs to be repaired to be placed directly in the storage area and lifted directly by the lifting device, reducing the round-trip time from the channel bank to the repair area and increasing work efficiency. Therefore, the present invention has high safety and high repair efficiency.

[0030] 2. In the present invention, a device and method for repairing channel lining plates under water conveyance conditions, a traction winch is used to move the platform on the water and ensure that the platform is in a horizontal state. Both the water-blocking device and the platform are designed as floating box structures. Buoyancy is used to float the device on the water surface to achieve buoyancy balance, thereby ensuring the stability of the platform. Water can be injected into the floating box and the U-shaped box by a water pump. After the floating box is filled with water, its center of gravity will drop, making it more stable. After the U-shaped box is filled with water, buoyancy is reduced, making the sinking of the water-blocking device smoother. At the same time, when the water-blocking device sinks to the bottom of the channel, the platform is supported by the bottom force and will not sway with the water flow, making the operation stable. The water in the floating box and the U-shaped box can be pumped into the channel by an air pump, which can facilitate the rapid rise of the water-blocking device. The rubber plate can prevent the U-shaped box from rigidly contacting the lining plate and damaging it. The kick plate and guardrail can prevent items on the platform from falling through the installation holes. Therefore, the present invention has high stability, high working efficiency, and high safety.

[0031] 3. In the present invention, a device and method for repairing channel lining plates under water conveyance conditions, a slide rail is installed on a platform, and a support can move on the slide rail via pulleys. Simultaneously, a crane can lift the lining plates. Four lining plates can be placed at a time in the storage area. The crane and support are used to lift and move the repaired lining plates to the channel bottom, making the operation convenient, efficient, and safe. The lifting device adopts a gear and rack transmission method. By installing a water-blocking device on the pile legs, the water-blocking device can rise and fall smoothly under the drive of the motor. Therefore, the present invention has high reliability and is easy to operate. Attached Figure Description

[0032] Figure 1 This is a top view schematic diagram of the canal bottom lining plate repair device in this invention.

[0033] Figure 2 This is a front view schematic diagram of the canal bottom lining plate repair device in this invention.

[0034] Figure 3 This is a structural schematic diagram of the platform, water-blocking device, lifting device, hoisting device, and traction winch in this invention.

[0035] Figure 4 This is a structural schematic diagram of the platform and lifting device in this invention.

[0036] Figure 5 This is a partial structural schematic diagram of the lifting device in this invention.

[0037] Figure 6 This is a schematic diagram of the rack, gear, and drive motor in this invention.

[0038] Figure 7 This is a structural block diagram of the canal bottom lining plate repair device in this invention.

[0039] Figure 8 This is a connection block diagram of the control system, lifting device, and hoisting device in this invention.

[0040] Figure 9 This is a connection block diagram of the control system, float box, and water-blocking device in this invention.

[0041] In the diagram: 1. Water channel; 2. Traction winch; 3. Control system; 4. Platform; 41. Float box; 42. Extension plate; 43. Kickboard; 44. Guardrail; 45. Mounting hole; 46. Storage area; 5. Water blocking device; 5. U-shaped box; 51. Rubber plate; 52. Pressure sensor; 53. Lifting device; 6. Track; 61. Pulley; 62. Bracket; 63. Hanger; 64. Crane; 65. Hydraulic thruster; 66. Lifting device; 7. Pile leg; 71. Rack; 72. Mounting frame; 73. Drive motor; 74. Gear; 75. Valve; 8. Water pump; 9. Air pump; 10. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1:

[0044] See Figures 1 to 9A device for repairing lining plates in a water conveyance state includes a platform 4, a water-blocking device 5, a lifting device 6, a hoisting device 7, four traction winches 2, and a control system 3. The platform 4 is horizontally arranged on the water surface. The four traction winches 2 are symmetrically arranged on both banks of the water channel 1. The output ends of the four traction winches 2 are respectively connected to the four vertices of the platform 4. The control system 3 is connected to the four traction winches 2. An installation hole 45 is provided at the center of the platform 4. A storage area 46 for accommodating lining plates is provided on the upper side of the platform 4. The lifting device 6, the hoisting device 7, and the control system 3 are respectively installed on the upper side of the platform 4. The water-blocking device 5 is U-shaped. The opening of the water-blocking device 5 faces the same direction as the water flow in the water channel (1). The output end of the hoisting device 7 passes through the platform 4 and is connected to the upper side of the water-blocking device 5. The lifting device 6, the hoisting device 7, and the traction winches 2 are respectively connected to the control system 3.

[0045] The lifting device 6 is used to lift the lining plate and lower it from the mounting hole 45 of the platform 4 to the bottom of the water channel 1;

[0046] The lifting device 7 is used to move the water-blocking device 5 to the lining plate at the bottom of the water channel 1.

[0047] The control system 3 is used to control the traction winch 2 to move the platform 4 and make it float horizontally on the water surface, control the lifting, moving and lowering of the hoisting device 6, and control the lifting device 7 to drive the water-blocking device 5 to move up and down.

[0048] A method for repairing channel bottom lining slabs under water conveyance conditions, the method being applied to a channel bottom lining slab repair device under water conveyance conditions, the method comprising the following steps:

[0049] S1. The repair device is lifted into the water channel 1 by a crane. Then, traction winches 2 are set up on both banks of the water channel 1 and connected to the platform 4. The control system 3 controls the traction force of the traction winches 2 to keep the platform 4 in a horizontal state. Then, the crane lifts the 4 small lining plates required to repair one lining plate to the storage area 46 on the platform 4. Then, the control system 3 controls the traction force of the traction winches 2 to pull the platform 4 to directly above the lining plate to be repaired.

[0050] S2. The control system 3 controls the traction force of the winch 2 to adjust the direction of the platform 4 so that the back surface of the water-blocking device 5 faces the direction of water flow. Then the control system 3 controls the lifting device 7 to work, so that the water-blocking device 5 sinks to the lining plate at the bottom of the canal 1. Then the control system 3 controls the lifting device 7 to stop working. At this time, the internal space of the water-blocking device 5 completely covers the lining plate that needs to be repaired.

[0051] S3. Once platform 4 is stable, the operator standing on platform 4 uses lifting device 6 to lift the lining plate from storage area 46 and lower it from the mounting hole 45 of platform 4 to the bottom of water channel 1. At the bottom of water channel 1, frogmen perform alignment and installation of the lining plate to complete the lining plate repair work.

[0052] Example 2:

[0053] The basic content is the same as in Example 1, except that:

[0054] See Figure 3 , Figure 4 and Figure 9 The platform 4 includes a float 41, an extension plate 42, a kick plate 43, and a guardrail 44. The extension plate 42 is connected to one side of the float 41 and has the storage area 46 on its upper side. The float 41 has a mounting hole 45 in its center. The kick plate 43 surrounds the mounting hole 45 and is connected to the upper side of the float 41. The guardrail 44 surrounds the kick plate 43 and is connected to the upper side of the float 41.

[0055] The water-blocking device 5 includes a U-shaped box 51, a rubber plate 52, and a pressure sensor 53. The U-shaped box 51 is horizontally arranged, and the opening of the U-shaped box 51 faces the same direction as the water flow in the water channel 1. The rubber plate 52 is connected to the lower side of the U-shaped box 51, and the pressure sensor 53 is connected to the lower side of the rubber plate 52. A water pump 9 and an air pump 10 are installed on both the U-shaped box 51 and the float box 41. The interior of the U-shaped box 51 and the float box 41 is hollow. An air inlet and an air outlet are opened on the upper side of the U-shaped box 51 and the float box 41, and an air inlet and a drain outlet are opened on the lower side of the U-shaped box 51 and the float box 41. A valve 8 is installed in both the air inlet and the air outlet and the air outlet. The water pump 9 is connected to the air inlet and the drain outlet, and the air pump 10 is connected to the air inlet and the air outlet. The valve 8, the air pump 10, the water pump 9, and the pressure sensor 53 are connected to the control system 3.

[0056] The air pump 10 is used to inject air into the U-shaped box 51 and the floating box 41;

[0057] The water pump 9 is used to pump water from the water channel 1 into the U-shaped box 51 and the float box 41;

[0058] The control system 3 is used to control the opening and closing of valve 8 and to control the operation of air pump 10 and water pump 9.

[0059] The specific steps of step S2 are as follows:

[0060] S21, the control system 3 controls the valve 8 in the inlet and outlet holes on the float box 41 to open, and at the same time controls the water pump 9 on the float box 41 to work, injecting water into the float box 41. When the draft of the float box 41 reaches the set depth, the control system 3 controls the valve 8 to close and controls the water pump 9 to stop working. Then the control system 3 controls the traction force of the traction winch 2 to adjust the direction of the float box 41 so that the outer top wall of the U-shaped box 51 faces the direction of water flow.

[0061] S22. The control system 3 controls the lifting device 7 to work, causing the water-blocking device 5 to sink while reading the pressure sensor 53. The control system 3 also opens the valve 8 in the air inlet and outlet holes on the float box 41 and the valve 8 in the water inlet and outlet holes on the U-shaped box 51. Then, the control system 3 controls the water pump 9 on the U-shaped box 51 to work to inject water into the U-shaped box 51 and the air pump 10 on the float box 41 to pump the water in the float box 41 into the water channel 1, so that the repair device is in a buoyancy balance state. When the U-shaped box 51 is full of water, the control system 3 closes the valve 8 in the air inlet and outlet holes on the float box 41 and the valve 8 in the water inlet and outlet holes on the U-shaped box 51. At the same time, the control system 3 stops the water pump 9 on the U-shaped box 51 and the air pump 10 on the float box 41, so that the water-blocking device 5 continues to sink.

[0062] S23. When the pressure in the pressure sensor 53 suddenly increases, the bottom of the water-blocking device 5 contacts the lining plate to be repaired. The control system 3 controls the lifting device 7 to slow down the descent speed, while maintaining the pressure in the pressure sensor 53 between 100 and 120 kPa. Then the control system 3 controls the lifting device 7 to stop working.

[0063] Example 3:

[0064] The basic content is the same as in Example 1, except that:

[0065] See Figure 4 and Figure 8 The lifting device 6 includes a track 61, a pulley 62, a support 63, a hanger 64, a crane 65, and a hydraulic thruster 66. The pulley 62 is connected to the lower side of the support 63 and is rotatably connected to the track 61. The hydraulic thruster 66 is connected to the lower side of the support 63 and its output end is connected to the pulley 62. The hanger 64 is horizontally connected to the upper side of the support 63. The crane 65 is connected to the lower side of the hanger 64 and is arranged relative to the storage area 46. The hydraulic thruster 66 and the crane 65 are connected to the control system 3.

[0066] Example 4:

[0067] The basic content is the same as in Example 1, except that:

[0068] See Figure 5 , Figure 6and Figure 8 The lifting device 7 includes four legs 71, each of which is hollow inside and open at the top. The four legs 71 are slidably connected to the platform 4 in a vertical direction. The lower ends of the four legs 71 are all connected to the upper side of the water-blocking device 5. The outer sides of the four legs 71 are all connected to racks 72. Four mounting brackets 73 are installed on the upper side of the platform 4. One side of each of the four mounting brackets 73 is connected to a drive motor 74. The output ends of each of the four drive motors 74 are connected to gears 75. The four gears 75 are respectively meshed with the four racks 72. The four drive motors 74 are respectively connected to the control system 3.

Claims

1. A device for repairing channel bottom lining plates under water conveyance conditions, characterized in that: The system includes a platform (4), a water-blocking device (5), a lifting device (6), a hoisting device (7), a traction winch (2), and a control system (3). The platform (4) is horizontally arranged on the water surface. The traction winch (2) is located on both banks of the water channel (1) and its output end is connected to the platform (4). An installation hole (45) is provided at the center of the platform (4). A storage area (46) for accommodating lining plates is provided on the upper side of the platform (4). The lifting device (6), the hoisting device (7), and the control system (3) are respectively installed on the upper side of the platform (4). On one side, the water-blocking device (5) is U-shaped, and the opening of the water-blocking device (5) faces the same direction as the water flow in the channel (1). The output end of the lifting device (7) passes through the platform (4) and is connected to the upper side of the water-blocking device (5). The hoisting device (6), the lifting device (7), and the traction winch (2) are respectively connected to the control system (3). The platform (4) includes a float (41), an extension plate (42), a kick plate (43), and a guardrail (44). The extension plate (42) is connected to one side of the float (41) and has a guardrail on the upper side. The storage area (46) is provided, and the mounting hole (45) is opened in the center of the float (41). The kick plate (43) surrounds the outer periphery of the mounting hole (45) and is connected to the upper side of the float (41). The guardrail (44) surrounds the outer periphery of the kick plate (43) and is connected to the upper side of the float (41). The water-blocking device (5) includes a U-shaped box (51). The U-shaped box (51) is arranged horizontally, and the opening of the U-shaped box (51) faces the same direction as the water flow in the water channel (1). The U-shaped box (51) and the float (45) are connected to the upper side of the float (41). 1) Each of the U-shaped box (51) and the float box (41) is equipped with a water pump (9) and an air pump (10). The U-shaped box (51) and the float box (41) are hollow inside. The upper side of the U-shaped box (51) and the float box (41) are provided with air inlet and air outlet holes. The lower side of the U-shaped box (51) and the float box (41) are provided with water inlet and drain holes. Valves (8) are installed in the air inlet and air outlet holes and the water inlet and drain holes. The water pump (9) is connected to the water inlet and drain holes. The air pump (10) is connected to the air inlet and air outlet holes. The valves (8), the air pump (10), and the water pump (9) are connected to the control system (3).The lifting device (6) includes a track (61), pulleys (62), a support (63), a hanger (64), a crane (65), and a hydraulic thruster (66). The pulleys (62) are connected to the lower side of the support (63) and are rotatably connected to the track (61). The hydraulic thruster (66) is connected to the lower side of the support (63) and its output end is connected to the pulleys (62). The hanger (64) is horizontally connected to the upper side of the support (63). The crane (65) is connected to... Arranged on the lower side of the hanger (64) and relative to the storage area (46), the hydraulic thruster (66), the crane (65) are connected to the control system (3), and the water-blocking device (5) further includes a rubber plate (52) and a pressure sensor (53). The rubber plate (52) is connected to the lower side of the U-shaped box (51), and the pressure sensor (53) is connected to the lower side of the rubber plate (52). The pressure sensor (53) is connected to the control system (3). The lifting device (6) is used to lift the lining plate and lower it from the mounting hole (45) of the platform (4) to the bottom of the canal (1); The lifting device (7) is used to move the water-blocking device (5) to the lining plate at the bottom of the water channel (1); The control system (3) is used to control the traction winch (2) to move the platform (4) and float horizontally on the water surface, control the lifting, moving and lowering of the hoisting device (6), control the lifting device (7) to drive the water blocking device (5) to move up and down, control the opening and closing of the valve (8), and control the operation of the air pump (10) and water pump (9). The air pump (10) is used to inject air into the U-shaped box (51) and the float box (41); The water pump (9) is used to pump water from the water channel (1) into the U-shaped box (51) and the float box (41).

2. The device for repairing channel bottom lining plates under water conveyance conditions according to claim 1, characterized in that: The lifting device (7) includes four legs (71), which are hollow inside and open at the top. The four legs (71) are slidably connected to the platform (4) in the vertical direction. The lower ends of the four legs (71) are all connected to the upper side of the water-blocking device (5). The outer sides of the four legs (71) are all connected to racks (72). Four mounting brackets (73) are installed on the upper side of the platform (4). One side of each of the four mounting brackets (73) is connected to a drive motor (74). The output ends of each of the four drive motors (74) are connected to gears (75). The four gears (75) are respectively meshed with the four racks (72). The four drive motors (74) are respectively connected to the control system (3).

3. The device for repairing channel bottom lining plates under water conveyance conditions according to claim 1, characterized in that: The number of the traction winches (2) is four, and the four traction winches (2) are symmetrically arranged on both banks of the water channel (1). The output ends of the four traction winches (2) are respectively connected to the four vertices of the platform (4). The control system (3) is connected to the four traction winches (2).

4. A method for repairing channel bottom lining plates under water conveyance conditions, characterized in that: The repair method is applied to the channel bottom lining plate repair device under water conveyance conditions as described in claim 1, and the repair method includes the following steps: S1. The repair device is lifted into the water channel (1) by a crane. Then, traction winches (2) are set up on both banks of the water channel (1) and connected to the platform (4). The control system (3) controls the traction force of the traction winches (2) to make the platform (4) horizontal. Then, the crane lifts the 4 small lining plates required to repair one lining plate to the storage area (46) on the platform (4). Then, the control system (3) controls the traction force of the traction winches (2) to pull the platform (4) directly above the lining plate to be repaired. S2. The control system (3) controls the direction of the traction adjustment platform (4) of the traction winch (2) so that the back surface of the water-blocking device (5) faces the water flow. Then the control system (3) controls the lifting device (7) to work so that the water-blocking device (5) sinks to the lining plate at the bottom of the water channel (1). Then the control system (3) controls the lifting device (7) to stop working. At this time, the internal space of the water-blocking device (5) completely covers the lining plate to be repaired. S3. After the platform (4) is stable, the operator standing on the platform (4) operates the lifting device (6) to lift the lining plate from the storage area (46) and lift it from the installation hole (45) of the platform (4) to the bottom of the water channel (1). At the bottom of the water channel (1), the frogman performs the alignment and installation of the lining plate to complete the repair work of the lining plate.

5. The method for repairing the channel bottom lining plate under water conveyance conditions according to claim 4, characterized in that: The specific steps of step S2 are as follows: S21. The control system (3) controls the valve (8) in the inlet and outlet holes of the float box (41) to open, and at the same time controls the water pump (9) on the float box (41) to work and inject water into the float box (41). When the draft of the float box (41) reaches the set depth, the control system (3) controls the valve (8) to close and controls the water pump (9) to stop working. Then the control system (3) controls the traction force of the traction winch (2) to adjust the direction of the float box (41) so that the outer top wall of the U-shaped box (51) is facing the water flow. S22. The control system (3) controls the lifting device (7) to work, so that the water blocking device (5) sinks. The control system (3) simultaneously opens the valve (8) in the air inlet and outlet hole on the float box (41) and the valve (8) in the drain hole on the U-shaped box (51). Then the control system (3) controls the water pump (9) on the U-shaped box (51) to work to inject water into the U-shaped box (51) and the air pump (10) on the float box (41) to pump the water in the float box (41) into the water channel (1), so that the repair device is in a buoyancy balance state. When the U-shaped box (51) is full of water, the control system (3) closes the valve (8) in the air inlet and outlet hole on the float box (41) and the valve (8) in the drain hole on the U-shaped box (51). At the same time, the control system (3) controls the water pump (9) on the U-shaped box (51) and the air pump (10) on the float box (41) to stop working, so that the water blocking device (5) continues to sink. S23. The water-blocking device (5) is lowered to the lining plate at the bottom of the water channel (1), and the control system (3) controls the lifting device (7) to stop working. At this time, the internal space of the water-blocking device (5) completely covers the lining plate to be repaired.

6. The method for repairing the channel bottom lining plate under water conveyance conditions according to claim 5, characterized in that: In steps S22 and S23, the specific steps for the water-blocking device (5) to sink to the bottom of the water channel (1) are as follows: The control system (3) controls the lifting device (7) to work so that the water-blocking device (5) sinks. At the same time, it reads the reading of the pressure sensor (53). When the pressure in the pressure sensor (53) suddenly increases, the bottom of the water-blocking device (5) contacts the lining plate to be repaired. The control system (3) controls the lifting device (7) to slow down the descent speed and keeps the pressure in the pressure sensor (53) within the set range. Then the control system (3) controls the lifting device (7) to stop working.

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