Floating box type gate for drag reduction and water drainage of navigable estuary and using method of floating box type gate

Abstract

The invention discloses a floating box type gate for drag reduction and drainage of a navigable estuary and a using method. The floating box type gate comprises a gate hole, a small gate, a hoisting system and cabins with different functions. The cabins comprise a water ballast tank, a water pump tank, a tide tank and a lifting cabin, and opening and closing of the buoyancy tank type gate are controlled through water pumping and injection of the cabins; the multiple gate holes are located in the middle of the buoyancy tank type gate and are evenly arranged at intervals. The water flow resistance during dragging or the flow during water drainage is adjusted through opening and closing of the small gates; the hoisting system comprises a hoisting cabin, a portal frame and a winch, the use method of the buoyancy tank type gate comprises the following steps: during tide blocking, opening the small gate, emptying the water ballast tank, towing the gate to a gate opening, injecting water into the water ballast tank, and closing the small gate; during water drainage, the small gate is opened, the water ballast space is emptied, and the towing belt returns to the original position. According to the buoyancy tank type gate, by adjusting opening and closing of the water ballast space and the small gate, the effects of large-span gate rapid towing, convenient opening and closing and high stability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic steel gates, and in particular to a buoy-type gate for reducing drag and discharging water in a navigable estuary and a use method thereof. Background Art

[0002] With the increasing frequency of extreme weather, the sea level is rising year by year. In addition, urban construction has led to land subsidence, and the tide control standards in estuary areas are constantly improving. Tidal gates are important facilities in water conservancy projects. They are mainly used to control tides, prevent floods and drainage, prevent seawater backflow, and protect the ecological environment of estuaries. In addition, they must also meet the requirements for ship navigation.

[0003] Commonly used tide gates in estuaries include lifting, flap and floating types. For rivers with navigation requirements, lifting gates have large opening and closing forces, and require large hoists when the water head is high. In addition, the clearance is limited, making it difficult to meet navigation requirements. Flap gates have low control accuracy, and siltation is easy to accumulate at the flap hinges, making them unsuitable for navigation environments with greater water depths. Floating gates are driven up and down by buoyancy, making them suitable for estuaries with frequent tides. However, conventional floating gates are not rigid enough overall and have weak wind and wave resistance. Strong tidal currents or floating objects may jam the pontoon, causing the gate to be unable to rise and fall normally, resulting in poor operational stability. The contact surface between the gate and the bottom plate and side wall is prone to gaps due to deformation, resulting in salt water leakage, poor sealing, and easy water leakage. Relying on automatic buoyancy control, it is difficult to adjust the switch as accurately as hydraulic or electric gates, and the adjustment takes a long time and the control accuracy is low.

[0004] Chinese utility model patent CN217781919U (publication date November 11, 2022) discloses a navigable river super-large span tide gate, including: left and right gate grooves and a pontoon-type tide gate body, the pontoon-type tide gate body is transported to the central tide blocking position of the river by a tugboat and its left and right sides are respectively inserted into the left and right gate grooves, and the left and right gate grooves are used for position limiting; the pontoon compartment separated by a number of partitions arranged in the pontoon-type tide gate body is filled with water or drained by the injection and drainage system to adjust the internal water volume of the tide gate body to control the floating and sinking of the gate body. It is provided with a guiding and positioning device to solve the problem of operational stability; the water blocking and drainage speeds are regulated by independently controlling the injection and drainage of the pontoon compartment.

[0005] In the process of towing the above-mentioned prior art to the gate, the gate itself is large in size and difficult to tow; in addition, due to the water flow resistance, the stability during towing is poor and it is easy to overturn; and it can only act as a whole, and the efficiency and accuracy of regulating drainage are not high.

[0006] Jin Wei introduced a pontoon-type dock door in "Research on Structural Optimization Design of Floating Dock Door" (Master's Thesis of Dalian University of Technology, 2020), which involves the field of dock equipment manufacturing. A dock is a dock-type building used for ship repair and construction. It can allow ships to enter and exit after filling with water, and can repair and build ships on a dry bottom after draining. The dock door is a watertight gate used to block the dock entrance. The floating dock door is divided into three sections: upper, middle and lower by the deck. The floating dock door contains cabins with different functions. The overflow tank with a gate valve is on the top layer, and the water inside and outside the cabin are connected. The pump room and ballast water tank are both located between the middle deck and the lower deck, and the fixed ballast is located in the lower cabin, that is, the fixed ballast tank. During the floating process, the water in the overflow tank is gradually discharged from its gate valve hole to the outside of the dock door as the floating dock door floats up, causing the dock door to float slowly and make the dock door more stable; when sinking, the water flowing into the overflow tank offsets the buoyancy generated during the sinking process, and also plays a role in enhancing safety and stability. The pontoon-type dock gate of the dry dock can meet the navigation needs and can also bear large horizontal loads. It is usually placed in the gate warehouse and towed by a tugboat when in use. Therefore, the estuary tidal gate can refer to the pontoon-type dock gate of the dry dock and adopt the form of partitioned pontoon-type gate.

[0007] The existing floating dock gate has high overall rigidity and strong wind and wave resistance, which solves the stability and safety problems of large-span tide gates. However, it is difficult to tow, and its large size makes it inflexible and inconvenient to open and close, and it is impossible to accurately control the water volume. In view of this, the present application provides a floating box gate for reducing resistance and discharging water in navigable estuaries and a method of use. Summary of the invention

[0008] The present invention aims to solve the problems in the prior art that large-span tide-blocking gates are difficult to tow, the gates are inflexible in opening and closing, and they cannot be precisely regulated. A pontoon-type gate for reducing resistance and discharging water in a navigable estuary and a method for using the gate are provided. The gate and the method for using the gate can reduce water resistance during towing, realize fast and stable towing, and flexibly open and close the gate, thereby achieving the purpose of precise and efficient tide blocking and water discharge.

[0009] A floating box gate for reducing drag and releasing water in a navigable estuary, characterized by:

[0010] The front is a long rectangular strip, the length of which is set according to the width of the gate. It includes cabins with different functions, gate holes, several small gates that can be opened and closed, and a lifting system for opening and closing the small gates.

[0011] The cabins are divided into ballast tanks, pump cabins, tidal cabins and hoisting cabins according to their functions;

[0012] The gate holes are evenly spaced and arranged in the middle of the pontoon gate;

[0013] The small gate corresponds to the position of the gate hole above and below, and a lifting system is arranged on the top;

[0014] The lifting system includes a lifting cabin, a gantry and a winch, which is a channel for the small gate to slide up and down between the gate hole and the gantry, and controls the opening and closing of the small gate.

[0015] Furthermore, the ballast tanks are divided into adjustable ballast tanks and fixed ballast tanks, which are arranged at the two ends and the lower part of the middle part of the pontoon gate. The fixed ballast tanks are arranged at the two ends of the middle part and the two ends of the lower part to play a ballast role; the adjustable ballast tanks are arranged in the middle of the lower part to adjust the buoyancy. The pump cabin is arranged in the middle of the middle part of the pontoon gate, directly above the adjustable ballast tank and connected to it. The water pump in the pump cabin discharges and fills water into the adjustable ballast tank to make the pontoon gate float and sink as a whole; the tidal tank is arranged on the upper part of the pontoon gate, and holes are provided on it to connect the internal and external water. Water can freely enter and exit the tidal tank to ensure the stability of the buoyancy of the pontoon gate, so that the gravity speed of the water in the tidal tank is adapted to the sinking speed and floating speed of the gate. The light load waterline of the pontoon gate (the full weight of the gate plus the fixed ballast) should be controlled below the bottom plate of the tidal tank.

[0016] Furthermore, the lifting system channel is connected up and down, closed on the left and right, and rollers and tracks are arranged on the wall side. The lifting cabin is located directly above the gate hole, and the gantry is located above the lifting cabin. It is a gantry-type structure, including a bracket and a gantry. The height of the lifting cabin exposed is greater than the height of the small gate itself, providing an operating interface for the inspection and maintenance of the small gate. A winch is arranged on the gantry, and the size of the winch is designed according to the weight of the small gate.

[0017] Furthermore, the track of the lateral track of the lifting system, the gantry lintel and the bottom sill of the gate hole are all made of welded components, and all embedded water-stopping surfaces are made of composite stainless steel plates.

[0018] Furthermore, a method for using a pontoon-type gate for reducing drag and releasing water in a navigable estuary is characterized by:

[0019] When receiving information about the coming storm surge, tide blocking is carried out, including the following steps:

[0020] S1: Open the small gate and empty the ballast tank. Start the winch, and the side rollers lift the small gate upward along the tracks on both sides of the lifting cabin. Close the winch, and fix the small gate at the top lintel of the gantry. The water pump in the pump room will empty the water in the adjustable ballast tank, so that the pontoon gate floats up, and the light load waterline of the pontoon gate (the full weight of the gate plus the fixed ballast) is controlled to be below the bottom plate of the tidal tank.

[0021] S2: Use tugboats to tow the pontoon gate to the gate. The tugboats are grouped in groups of four, and different groups are configured according to different gate widths. Each group is assigned a tugboat to tow in the forward direction, and three tugboats to push in the backward direction. The pushing tugboats are evenly distributed, and the position of the tugboat towing rope is below the buoyancy center of the pontoon gate, and the pushing position avoids the turbulent water flow in the gate hole. When the pontoon gate needs to turn, the direction is controlled by the rear pushing tugboat. The tugboat controls the direction and pushes synchronously at the place with a larger turning radius, and only controls the direction to keep it in place at the place with a smaller turning radius.

[0022] S3: Fully ballast, close the small gate. After the tugboat tows the pontoon gate to the designated location of the gate, it fills the ballast tank with water through the water filling valve in the ballast tank to stabilize the pontoon gate. After the pontoon gate sinks into the gate threshold, it is further fixed by a wire rope, and the winch is started. The small gate passes through the lifting cabin and descends to the bottom sill of the gate. When a water level difference is formed between the upstream and downstream of the gate, it means that the small gate has been successfully closed.

[0023] S4: When the storm tide recedes, the flood discharge and drainage are carried out when the water level difference between upstream and downstream is reversed. Start the winch to lift the small gate, and control the flood discharge and drainage speed by adjusting the upper and lower positions of the small gate. When the water levels on both sides are flush, the small gate is fully opened, the winch is closed, and the small gate is fixed at the top lintel of the gantry. The water pump in the pump room will empty the water in the adjustable ballast tank to float the pontoon gate, loosen the wire rope, and after the pontoon gate is fully floated, it will be towed out of the gate threshold by a tugboat and towed to a position that does not affect the passage of the waterway.

[0024] Compared with the prior art, the technical solution of the present application has the following advantages and effects:

[0025] 1. In the prior art, pontoon gates are usually transported as a whole. Due to the large size of the large-span pontoon gates, the water flow resistance is huge and it is difficult to tow. This application reduces the deadweight of the pontoon gates by emptying the ballast tanks before towing, opens the small gates, reduces the water flow resistance during towing, and increases the towing speed;

[0026] 2. The floating box gate in the prior art is inconvenient to move, and is prone to being in a certain state for a long time due to management and cost issues, and cannot be flexibly adjusted. This application adopts multiple gate holes and small gates arranged evenly and a lifting system with guide rails and pulleys arranged vertically on both sides to achieve the effect of fast and flexible opening and closing;

[0027] 3. In the prior art, the pontoon-type gate can only be used as a whole, and has only two working states: fully open or fully closed. This application achieves the effect of accurately regulating the discharge flow by adjusting the opening degree of the small gate on the pontoon-type gate;

[0028] 4. Although the existing pontoon-type gate can reduce water resistance by draining water during towing, the gate is still prone to instability and capsize due to wind, water environment or inappropriate towing point during towing. This application reasonably arranges the cabins and adjusts the water level of the water tank, controls the center of gravity of the gate, and reasonably organizes the tugboat to ensure the overall stability and safety during the towing process and the tide-blocking and flood-discharging process.

[0029] The above is only an overview of the technical solution of the present application. In order to enable the technical means of the present application to be implemented in accordance with the contents of the specification and to make the above and other purposes, features and advantages of the present application clearer and easier to understand, the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. According to the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will be more aware of the above and other purposes, features and advantages of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly describe the technical solutions of the present invention and the embodiments, the following briefly describes the drawings required for describing the embodiments of the present invention. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0031] Figure 1 It is a schematic elevation view of a drag reduction and water release pontoon-type gate located at a gate to block water according to an embodiment of the present invention.

[0032] Figure 2 It is a schematic cross-sectional view of the compartments of the drag reduction and water discharge pontoon-type gate according to an embodiment of the present invention.

[0033] Figure 3 It is a schematic plan view of a tugboat towing a drag reduction and water discharge pontoon-type gate according to an embodiment of the present invention.

[0034] Figure numerals: 1. pontoon-type gate; 2. gate hole; 31. adjustable ballast water tank; 32. fixed ballast water tank; 4. pump room; 5. tidal tank; 6. lifting cabin; 7. small gate; 8. gantry; 9. winch; 101. towing tugboat; 102. push tugboat. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can also make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0036] Example 1

[0037] This embodiment provides a floating box gate for reducing drag and releasing water in a navigable estuary. The front side is a rectangular strip, and the length is set according to the width of the gate. Figure 1 As shown, it includes cabins with different functions, a gate hole 2, a plurality of small gates 7 that can be opened and closed, and a supporting lifting system for opening and closing the small gates 7;

[0038] The cabins are divided into ballast tanks, pump cabins 4, tidal cabins 5 and hoisting cabins 6 according to their functions;

[0039] The gate holes 2 are evenly spaced and arranged in the middle of the buoy-type gate 1;

[0040] The small gate 7 corresponds to the gate hole 2 above and below, and a lifting system is provided above;

[0041] The lifting system includes a lifting cabin 6, a gantry 8 and a winch 9, which is a passage for the small gate 7 to slide up and down between the gate hole 2 and the gantry 8, and controls the opening and closing of the small gate 7.

[0042] Further, such as Figure 2 As shown, the ballast tank is divided into an adjustable ballast tank 31 and a fixed ballast tank 32. The fixed ballast tank 32 is arranged at both ends of the middle part and the lower end to play a ballast role; the adjustable ballast tank 31 is arranged in the middle of the lower part to adjust the buoyancy. The pump cabin 4 is arranged in the middle of the middle part of the pontoon gate 1, directly above the adjustable ballast tank 31, and connected to it. The water pump in the pump cabin 4 discharges and injects water into the adjustable ballast tank 31, so that the pontoon gate 1 floats and sinks as a whole; the tidal tank 5 is arranged on the upper part of the pontoon gate 1, and holes are provided on it to connect the internal and external water. Water can freely enter and exit the tidal tank 5 to ensure the stability of the buoyancy of the pontoon gate 1, so that the self-flow speed of the water in the tidal tank 5 is adapted to the sinking speed and floating speed of the gate. The light load waterline (full weight of the gate plus fixed ballast) of the pontoon gate 1 should be controlled below the bottom plate of the tidal tank 5.

[0043] Furthermore, the lifting system channel is connected up and down, closed on the left and right, and rollers and tracks are arranged on the wall side. The lifting cabin 6 is located directly above the gate hole 2, and the gantry 8 is located above the lifting cabin 6. It is a gantry-type structure, including a bracket and a gantry. The height of the lifting cabin 6 exposed is greater than the height of the small gate 7 itself, providing an operating interface for the inspection and maintenance of the small gate 7. A winch 9 is arranged on the gantry 8, and the size of the winch 9 is designed according to the weight of the small gate 7.

[0044] Furthermore, the track of the lateral track of the lifting system, the lintel of the gantry 8 and the bottom sill of the gate hole 2 are all welded components, and all embedded water-stopping surfaces are made of composite stainless steel plates.

[0045] The technical effect achieved by this embodiment is: the multiple independently controlled small gates evenly arranged on the pontoon-type gate in this embodiment and the lifting system with guide rails and pulleys arranged vertically on both sides can be opened and closed quickly and flexibly; by controlling the opening degree of the small gates, the discharge flow rate can be accurately regulated; the cabins are reasonably arranged and the water level of the water tank is clearly defined at different stages, the center of gravity of the gate is controlled, and the overall stability is ensured.

[0046] Example 2

[0047] This embodiment provides a method for using a floating box gate for reducing drag and releasing water in a navigable estuary, and when receiving information about the coming storm surge, the method is used to block the tide. The method comprises the following steps:

[0048] S1: Open the small gate 7 and empty the adjustable ballast tank 31. Start the winch 9, and the side rollers lift the small gate 7 upward along the tracks on both sides of the hoisting cabin 6. Close the winch 9, and fix the small gate 7 at the top lintel of the gantry 8; the water pump in the pump cabin 4 empty the water in the adjustable ballast tank 31, so that the pontoon gate 1 floats up, and the light load waterline of the pontoon gate 1 (the full weight of the gate plus the fixed ballast) is controlled to be below the bottom plate of the tidal tank 5.

[0049] S2: Use a tugboat to tow the pontoon gate 1 to the gate. Figure 3 As shown, the tugboats are arranged in groups of four, and different groups are configured according to different gate widths. Each group is arranged with a towing tugboat 101 to tow in the forward direction, and three pushing tugboats 102 to push in the backward direction; the pushing tugboats 102 are evenly distributed, the rope action position of the towing tugboat 101 is below the buoyancy center, and the pushing position avoids the turbulent water flow of the gate hole 2. When the pontoon-type gate 1 needs to turn, the rear pushing tugboat 102 controls the direction. The tugboat 102 controls the direction and pushes synchronously at a larger turning radius, and the pushing tugboat 102 only controls the direction at a smaller turning radius.

[0050] S3: Fully ballast, close the small gate 7. After the tugboat tows the pontoon gate 1 to the designated position of the gate, it fills the adjustable ballast tank 31 with water through the water filling valve in the ballast tank to stabilize the pontoon gate 1. After the pontoon gate 1 sinks into the gate threshold, it is further fixed by wire ropes and other equipment. Start the winch 9, the small gate 7 passes through the lifting cabin 6 and descends to the bottom sill of the gate hole 2. When the water level difference is formed between the upstream and downstream of the gate, it indicates that the small gate 7 has been successfully closed.

[0051] S4: When the storm tide recedes, the upstream and downstream water level difference reverses and flood discharge and drainage are carried out. Start the winch 9, lift the small gate 7, and control the flood discharge and drainage speed by adjusting the upper and lower positions of the small gate 7. When the water levels on both sides are flush, the small gate 7 is fully opened, the winch 9 is closed, the small gate 7 is fixed at the top lintel of the gantry 8, the pump cabin 4 drains the water in the adjustable ballast tank 31, and the pontoon gate 1 floats up. The wire rope is loosened, and after the pontoon gate 1 is fully floated, it is towed out of the gate threshold by a tugboat and dragged to a position that does not affect the passage of the waterway.

[0052] The technical effects achieved by this embodiment are: emptying the ballast water tank before towing, reducing the deadweight of the pontoon-type gate, opening the small gate, reducing the water flow resistance during towing, and increasing the towing speed; by reasonably arranging the cabins and adjusting the water level of the floating tank, controlling the center of gravity of the gate, and reasonably organizing the tugboat, the overall stability during towing is ensured to avoid capsizing.

[0053] The above is only an exemplary embodiment of the present invention, not all embodiments. It should be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence, and all changes and modifications are included in the scope of protection of the present disclosure as defined by the claims. The scope of protection of the present disclosure is defined by the attached claims, and the equivalents of these claims are also included.

Claims

1. A floating box gate for reducing drag and releasing water in a navigable estuary, characterized by: The front is a long rectangular strip, including a gate hole, several small gates that can be opened and closed, a supporting lifting system for opening and closing the small gates, and cabins with different functions; The cabin is divided into a ballast water tank, a pump cabin (4), a tidal cabin (5) and a hoisting cabin (6); The gate holes (2) are evenly spaced and arranged in the middle of the buoy-type gate (1); The small gate (7) corresponds to the gate hole (2) in upper and lower positions, and a lifting system is arranged on the upper part; The lifting system comprises a lifting cabin (6), a gantry (8) and a winch (9), which is a passage for the small gate (7) to move up and down between the gate hole (2) and the gantry (8), and controls the small gate (7) to slide up and down to open and close.

2. A floating box gate for reducing drag and releasing water in a navigable estuary according to claim 1, characterized in that: The ballast water tank is divided into an adjustable ballast water tank (31) and a fixed ballast water tank (32), the fixed ballast water tank (32) is arranged at both ends of the middle part and the two ends of the lower part, and the adjustable ballast water tank (31) is arranged in the middle of the lower part; The water pump cabin (4) is arranged in the middle of the pontoon-type gate, located directly above the adjustable ballast water tank (31) and connected thereto, and the water pump in the water pump cabin (4) discharges and fills water into the adjustable ballast water tank (31); The tidal chamber (5) is arranged on the upper part of the buoy-type gate (1) and is provided with holes to allow the internal and external water to communicate.

3. A floating box gate for reducing drag and releasing water in a navigable estuary according to claim 2, characterized in that: The lifting system channel is connected vertically and closed on the left and right sides, and rollers and tracks are arranged on the wall side; the lifting cabin (6) is located directly above the gate hole (2), and the gantry (8) is located above the lifting cabin (6), which is a gantry-type structure, including a bracket and a gantry, and the height exposed from the lifting cabin (6) is greater than the height of the small gate (7) itself; a winch (9) is arranged on the gantry (8).

4. A floating box gate for reducing drag and releasing water in a navigable estuary according to claim 3, characterized in that: The track of the lateral track of the lifting system, the lintel of the gantry (8) and the bottom sill of the gate hole (2) are all welded components, and the water-stopping surfaces of all embedded parts are made of composite stainless steel plates.

5. A buoy-type gate for reducing drag and releasing water from a navigable estuary according to any one of claims 1 to 4, wherein the interior of the buoy-type gate (1) is divided into a plurality of compartments by steel plates.

6. A method for using a floating box gate for reducing drag and releasing water in a navigable estuary according to any one of claims 1 to 5, characterized in that: When receiving information about the coming storm surge, tide blocking is carried out; the following steps are included: S1: Open the small gate (7) to empty the adjustable ballast water tank (31); start the winch (9), and the side rollers lift the small gate (7) upward along the tracks on both sides of the lifting cabin; close the winch (9), and fix the small gate (7) at the top lintel of the gantry (8); the water pump in the water pump room (4) empty the water in the adjustable ballast water tank (31); S2: The tugboat 10 is used to tow the pontoon gate to the gate; the tugboats (10) are arranged in a group of four, and each group is provided with a towing tugboat (101) to tow in the forward direction, and three pushing tugboats (102) to push in the backward direction. The pushing tugboats (102) are evenly distributed, and the rope action position of the towing tugboat (101) is set below the buoyancy center, and the pushing position of the pushing tugboat (102) avoids the turbulent water flow in the gate hole; when the pontoon gate (1) needs to turn, the direction is controlled by the rear pushing tugboat (102). The pushing tugboat (102) controls the direction and pushes synchronously at a larger turning radius, and only controls the direction at a smaller turning radius; S3: Fully ballast the small gate (7); after the tugboat tows the pontoon gate (1) to the designated position of the gate, water is injected into the adjustable ballast tank (31) through the water injection valve. After the pontoon gate (1) sinks into the gate threshold, it is further fixed by a steel wire rope, and the winch (9) is started, and the small gate (7) passes through the lifting cabin (6) and enters the bottom sill of the gate hole (2).

7. The method for using a floating box gate for reducing drag and releasing water in a navigable estuary according to claim 6, characterized in that: When discharging flood water, the winch (9) is started to lift the small gate (7), and the speed of flood discharge and drainage is controlled by adjusting the upper and lower positions of the small gate (7). S4: When the flood discharge and drainage is completed, the small gate (7) is fully opened and fixed at the top lintel of the gantry (8), and the water pump in the pump room (4) empties the water in the adjustable ballast water tank (31), so that the pontoon gate (1) floats up, and the wire rope is released. After the pontoon gate (1) completely floats up, it is towed out of the gate threshold by a tugboat and towed to a position that does not affect the passage of the waterway.

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