Self-floating lifting device for end of dam front debris boom

Abstract

The utility model provides a dam front blocks the end of the row and floats formula lifting device, including the portal frame of fixed in concrete base top, the portal frame is fixed with first fixed pulley and second fixed pulley, the inside concrete base is provided with first guide groove and second guide groove and is located the portal frame directly below, the inside first guide groove is provided with the sliding balance weight, and the inside second guide groove is provided with the sliding end trolley, the portal frame is fixed with first hand chain hoist, and the steel cable is connected on first hand chain hoist, and the other end of steel cable is connected with second hand chain hoist in turn and passes over balance weight, first fixed pulley, second fixed pulley and end trolley, and second hand chain hoist is fixed on the portal frame, and end trolley is connected with end float box through universal hinge part, and end float box is connected with middle float box through one-way hinge part, can improve the adaptive capacity of the end structure of the row of blocking the change with water level, guarantee that the plumb plane of end structure horizontal barycenter and the plumb plane of horizontal float center tend to coincide.

Description

Technical Field

[0001] This utility model relates to the field of anti-floating and floating device in front of dams in water conservancy and hydropower projects, specifically a self-floating lifting device at the end of an anti-floating and floating device in front of dams. Background Technology

[0002] In the field of water conservancy and hydropower engineering, especially in dams, floating debris entering the generator units in front of the dam can seriously affect the operation and safety of the dam power station. Therefore, it is common practice to set up a debris interceptor to intercept and clean up the floating debris in front of the dam.

[0003] Floating barriers are generally classified into fixed, lifting, and self-floating types. Fixed floating barriers have their ends fixed at fixed positions on both banks and do not move with water level changes. They are generally suitable for reservoirs where the water level fluctuation does not exceed 5 meters. Lifting floating barriers consist of a trolley, a guide channel, and a winch at the top. The trolley moves up and down with water level changes driven by the winch. However, this type of floating barrier requires dedicated personnel to operate. Self-floating floating barriers consist of a trolley, a guide channel, and an end pontoon. The trolley moves up and down with water level changes driven by buoyancy, which can save on labor and electricity costs.

[0004] Currently, the end trolleys of self-floating drift barriers mainly rely on their own buoyancy and the pulling effect of the end pontoons to operate. Section 7.0.011 of the "Design Code for Drift Barriers in Hydropower Engineering" (NB / T10609-2021) stipulates that the overall structure of the end trolley and end pontoons of a self-floating drift barrier should have its lateral center of gravity and lateral buoyancy points roughly coinciding, and its longitudinal attitude should be roughly horizontal. However, in actual engineering, because the end trolleys are often made of steel, with high density and weight, relying solely on their own buoyancy and the pulling effect of the end pontoons is insufficient for their normal operation. This results in the end pontoons being partially submerged below the water surface, causing the center of gravity and buoyancy to deviate, and the longitudinal attitude to become tilted at a certain angle, affecting drift barrier efficiency. Furthermore, when the end trolley becomes stuck, it can lead to deformation or even damage to the pontoons and the pontoons. Utility Model Content

[0005] To address the aforementioned issues, this invention proposes a self-floating lifting device at the end of a dam-front drift barrier. This device enhances the adaptive capability of the drift barrier end structure to changes in water level, ensures that the plumb plane containing the transverse center of gravity of the end structure coincides with the plumb plane containing the transverse center of buoyancy, maintains a horizontal longitudinal posture, and solves the problem of deformation and damage caused by the end trolley jamming.

[0006] To achieve the aforementioned technical features, the purpose of this utility model is as follows: A self-floating lifting device for the end of a dam-front drift barrier includes a gantry frame fixed to the top of a concrete base, with a first fixed pulley and a second fixed pulley fixed on the gantry frame; a first guide groove and a second guide groove are provided inside the concrete base and directly below the gantry frame, with a balance block slidably disposed inside the first guide groove and an end trolley slidably disposed inside the second guide groove; a first hand-operated hoist is fixed on the gantry frame, with a steel cable connected to the first hand-operated hoist, the other end of which sequentially passes around the balance block, the first fixed pulley, the second fixed pulley, and the end trolley and connects to the second hand-operated hoist, which is fixed to the gantry frame; the end trolley is connected to an end pontoon via a universal hinge component, and the end pontoon is connected to a central pontoon via a one-way hinge component.

[0007] Preferably, the gantry frame consists of two layers comprising multiple steel columns and steel beams. The steel columns are fixed to a concrete base, and the steel beams are connected between the steel columns to form a frame structure.

[0008] Preferably, both the steel columns and steel beams are made of structural steel.

[0009] Preferably, the first guide groove is anchored inside the concrete base by anchor bolts; The second guide groove is anchored inside the concrete base by anchor bolts; The second guide groove is provided with a through groove for passing through the universal joint component.

[0010] Preferably, the top of the balance block is fixed with a first movable pulley for passing over the steel cable, and the four outer side walls of the balance block are equipped with first rollers for cooperating with the first guide groove.

[0011] Preferably, the top of the end carriage is fixed with a second movable pulley for passing over the steel cable, and the outer side wall of the end carriage is equipped with a second roller for cooperating with the second guide groove.

[0012] Preferably, the first hand chain hoist is connected to the end of the steel cable via a first steel chain and a first hook.

[0013] Preferably, the second hand chain hoist is connected to the other end of the steel cable via a second steel chain and a second hook.

[0014] Preferably, the first fixed pulley and the second fixed pulley are fixed to the second layer of steel beams of the gantry frame; The first and second hand chain hoists are fixed to the first layer of steel beams of the gantry frame.

[0015] Preferably, the first and second chain hoists are at the same height and can meet the conditions for manual operation; the first and second fixed pulleys are at the same height and are not lower than the first and second chain hoists, and do not interfere with each other.

[0016] The present invention has the following beneficial effects: 1. This utility model uses the gravity of the counterweight to balance most of the weight of the end trolley, so that the end trolley can move up and down with the water level by means of its own buoyancy and the pulling force of the end pontoon. The overall structure composed of the end trolley and the end pontoon has its lateral center of gravity on the plumb plane and its lateral center of buoyancy on the plumb plane, and its longitudinal attitude should be horizontal, which meets the specifications.

[0017] 2. The hand-operated hoist of this utility model is fixed to the steel beam of the gantry frame, connected to the ceiling via a steel chain, and then connected to the end trolley and counterweight via a steel cable. When the end trolley or counterweight is jammed, the chain of the hand-operated hoist can be manipulated to lift the end trolley or counterweight, thereby freeing it from obstruction and preventing deformation and damage to the end trolley, counterweight, and end float box. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the elevation structure of this utility model.

[0020] Figure 2 This is a plan view of the balance block, end trolley, and float box in this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the gantry frame in this utility model.

[0022] In the diagram: 1. Gantry frame; 2-1. First fixed pulley; 2-2. Second fixed pulley; 3-1. First hand chain hoist; 3-2. Second hand chain hoist; 3-3. First steel chain; 3-4. Second steel chain; 3-5. First hook; 3-6. Second hook; 4-1. First guide groove; 4-2. Second guide groove; 5. Counterweight; 5-1. First movable pulley; 5-2. First roller; 6. End trolley; 6-1. Second movable pulley; 6-2. Second roller; 7. Universal hinge component; 8. End pontoon; 9. One-way hinge component; 10. Middle pontoon; 11. Concrete base; 12. Anchor bolt; 13. Steel cable. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] See Figure 1-3 A self-floating lifting device for the end of a dam-front drift barrier includes a gantry frame 1 fixed to the top of a concrete base 11, with a first fixed pulley 2-1 and a second fixed pulley 2-2 fixed on the gantry frame 1; a first guide groove 4-1 and a second guide groove 4-2 are provided inside the concrete base 11 and directly below the gantry frame 1, with a balance block 5 slidably disposed inside the first guide groove 4-1 and an end trolley 6 slidably disposed inside the second guide groove 4-2; a first hand-operated hoist 3-1 is fixed on the gantry frame 1, with a steel cable 13 connected to the first hand-operated hoist 3-1, the other end of the steel cable 13 passing sequentially around the balance block 5, the first fixed pulley 2-1, the second fixed pulley 2-2 and the end trolley 6 and connected to the second hand-operated hoist 3-2, which is fixed on the gantry frame 1; the end trolley 6 is connected to an end pontoon 8 via a universal hinge component 7, and the end pontoon 8 is connected to a central pontoon 10 via a one-way hinge component 9. By employing the aforementioned lifting device, the weight of the end trolley is largely balanced by the gravity of the counterweight, allowing the end trolley to move up and down with water level changes using its own buoyancy and the pulling force of the end pontoon. This ensures that the horizontal center of gravity of the overall structure consisting of the end trolley and the end pontoon tends to coincide with the horizontal center of buoyancy, and its longitudinal attitude tends to be horizontal, meeting the specifications. If the end trolley or counterweight becomes jammed, the manual hoist directly above each can be pulled to release it from the jam.

[0025] Furthermore, the gantry frame 1 is divided into two layers, comprising multiple steel columns 1-1 and steel beams 1-2. The steel columns 1-1 are fixed to the concrete base 11, and the steel beams 1-2 are connected between the steel columns 1-1 to form a frame structure. By adopting the above-mentioned gantry frame 1, the stability and reliability of its structure are ensured, and it is guaranteed to have sufficient structural strength.

[0026] Furthermore, both the steel column 1-1 and the steel beam 1-2 are made of shaped steel. Using shaped steel simplifies the structure and reduces the difficulty of its manufacture.

[0027] Furthermore, the first guide groove 4-1 is anchored inside the concrete base 11 by anchor rods 12; the second guide groove 4-2 is also anchored inside the concrete base 11 by anchor rods; the second guide groove 4-2 is provided with a through groove for the universal hinge component 7 to pass through. By using the aforementioned anchor rods 12, the first guide groove 4-1 and the second guide groove 4-2 can be reliably fixed, thereby ensuring the stability and reliability of the structure and effectively preventing subsequent deformation, ensuring smooth lifting and sliding of the balance block 5 and the end trolley 6.

[0028] Furthermore, a first movable pulley 5-1 for passing over the steel cable 13 is fixed to the top of the balance block 5, and first rollers 5-2 for cooperating with the first guide groove 4-1 are installed on the four outer side walls of the balance block 5. The balance block 5 is thus able to smoothly slide up and down inside the first guide groove 4-1 with the help of the first rollers 5-2.

[0029] Furthermore, a second movable pulley 6-1 for passing over the steel cable 13 is fixed to the top of the end carriage 6, and a second roller 6-2 for cooperating with the second guide groove 4-2 is installed on the outer side wall of the end carriage 6. The end carriage 6 is thus equipped with the second roller 6-2 to ensure smooth lifting and sliding within the second guide groove 4-2.

[0030] Furthermore, the first chain hoist 3-1 is connected to the end of the steel cable 13 via the first steel chain 3-3 and the first hook 3-5. This connection structure ensures a reliable connection between the steel cable 13 and the first chain hoist 3-1.

[0031] Furthermore, the second chain hoist 3-2 is connected to the other end of the steel cable 13 via the second steel chain 3-4 and the second hook 3-6. This connection structure ensures a reliable connection between the steel cable 13 and the second chain hoist 3-2.

[0032] Furthermore, the first fixed pulley 2-1 and the second fixed pulley 2-2 are fixed to the second layer of steel beams of the gantry frame 1; the first hand chain hoist 3-1 and the second hand chain hoist 3-2 are fixed to the first layer of steel beams of the gantry frame 1. The above-mentioned fixed installation structure ensures the stability and reliability of the structure and prevents mutual interference.

[0033] Furthermore, the first chain hoist 3-1 and the second chain hoist 3-2 are at the same height and can meet the conditions for manual operation; the first fixed pulley 2-1 and the second fixed pulley 2-2 are at the same height and are not lower than the first chain hoist 3-1 and the second chain hoist 3-2, and do not interfere with each other.

[0034] Example 2: The weight of the balance block 5 should be set according to the following conditions: ; ; ; ; in G 平 The weight of the balance block 5 is... F 车浮 The buoyancy force exerted by the water when the end trolley 6 is fully submerged in the water. F 箱 The force transmitted from the end float 8 to the end trolley 6 via the universal joint 7. G 车 The weight of the end carriage 6. f This represents the total frictional resistance during operation.

[0035] Example 3: The height of the first hook 3-5 and the second hook 3-6 shall not be lower than the top elevation, and the total length of the steel cable 13 shall meet the following conditions: ; in h The total length of the steel cable 13 is [missing information]. h 顶部 This is the top elevation. h 底部 This is the bottom elevation. h 车 The height of the end carriage 6 h 平 The height of the balance block 5 d 动1 The diameter of the first movable pulley 5-1 is... d 动2 The diameter of the second movable pulley 6-1 is... d 定1 The diameter of the first fixed pulley 2-1 is... d 定2 The diameter of the second fixed pulley 2-2 is... h 定 The height of the center of the first fixed pulley 2-1 and the second fixed pulley 2-2 from the top elevation of the ground. L 定 The distance between the centers of the first fixed pulley 2-1 and the second fixed pulley 2-2 in the horizontal direction.

[0036] The working process and principle of this utility model: When the water level remains constant, the end trolley 6 remains in balance under the action of the weight of the counterweight 5, its own buoyancy, friction, and the pulling force of the end float 8, satisfying the following condition: ; As the water level rises, the end trolley 6 moves upward with the rising water level under the action of the gravity of the counterweight 5, its own buoyancy, friction, and the pulling force of the end float 8. At this time, the following condition must be met: ; As the water level drops, the balance block 5 of the end trolley 6 moves downward due to gravity, its own buoyancy, and friction. At this time, the following condition must be met: ; like Figure 1 As shown, after the balance block 5 balances most of the weight of the end trolley 6, the end trolley 6 adapts to water level changes by relying only on its own buoyancy and the force provided by the end float box 8 under different water level conditions, and rises or falls according to the water level changes.

[0037] like Figure 2 As shown, the end trolley 6 is connected to the end float 8 via a universal hinge component 7, and the end float 8 is connected to the middle float 10 via a one-way hinge component 9. The end float 8 and the middle float 10 can rotate relative to each other in the direction of water flow, but not relative to each other in the direction of the vertical horizontal plane.

[0038] like Figure 1 and Figure 3 As shown, under normal operating conditions, the first chain hoist 3-1 and the second chain hoist 3-2 are locked, serving only as fixing points at both ends of the steel cable 13 to provide support. The first steel chain 3-3 and the second steel chain 3-4 are locked, and the first hook 3-5 and the second hook 3-6 are above the top elevation. When the end trolley 6 moves upward or downward with changes in water level, the counterweight 5 moves in the opposite direction to the end trolley 6 under the tension of the steel cable 13. If the counterweight 5 becomes stuck during operation, it can be manually pulled up or released by operating the first chain hoist 3-1. If the end trolley 6 becomes stuck during operation, it can be manually pulled up or released by operating the first chain hoist 3-2.

[0039] The above description is merely an embodiment of this utility model, and while the description is specific and detailed, it should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A self-floating lifting device at the end of a dam-front drift barrier, characterized in that, The system includes a gantry (1) fixed to the top of a concrete base (11), with a first fixed pulley (2-1) and a second fixed pulley (2-2) fixed on the gantry (1); a first guide groove (4-1) and a second guide groove (4-2) are provided inside the concrete base (11) and directly below the gantry (1); a balance block (5) is slidably arranged inside the first guide groove (4-1), and an end trolley (6) is slidably arranged inside the second guide groove (4-2); a first hand-operated hoist (3-) is fixed on the gantry (1). 1) A steel cable (13) is connected to the first hand chain hoist (3-1). The other end of the steel cable (13) passes through the balance block (5), the first fixed pulley (2-1), the second fixed pulley (2-2) and the end trolley (6) in sequence and is connected to the second hand chain hoist (3-2). The second hand chain hoist (3-2) is fixed on the gantry frame (1). The end trolley (6) is connected to the end float box (8) through the universal hinge component (7). The end float box (8) is connected to the middle float box (10) through the one-way hinge component (9).

2. The self-floating lifting device at the end of the dam-front drift barrier according to claim 1, characterized in that, The gantry frame (1) is divided into two layers, including multiple steel columns (1-1) and steel beams (1-2). The steel columns (1-1) are fixed on the concrete base (11), and the steel beams (1-2) are connected between the steel columns (1-1) to form a frame structure.

3. The self-floating lifting device at the end of the dam-front drift barrier according to claim 2, characterized in that, The steel columns (1-1) and steel beams (1-2) are both made of structural steel.

4. The self-floating lifting device at the end of the dam-front drift barrier according to claim 2, characterized in that, The first guide groove (4-1) is anchored inside the concrete base (11) by anchor rod (12); The second guide groove (4-2) is anchored inside the concrete base (11) by anchor rods; The second guide groove (4-2) is provided with a through groove for passing through the universal joint component (7).

5. The self-floating lifting device at the end of the dam-front drift barrier according to claim 1, characterized in that, The top of the balance block (5) is fixed with a first movable pulley (5-1) for passing over the steel cable (13), and the four outer side walls of the balance block (5) are equipped with first rollers (5-2) for cooperating with the first guide groove (4-1).

6. The self-floating lifting device at the end of the dam-front drift barrier according to claim 1, characterized in that, The top of the end carriage (6) is fixed with a second movable pulley (6-1) for passing around the steel cable (13), and a second roller (6-2) for cooperating with the second guide groove (4-2) is installed on the outer side wall of the end carriage (6).

7. The self-floating lifting device at the end of the dam-front drift barrier according to claim 2, characterized in that, The first hand chain hoist (3-1) is connected to the end of the steel cable (13) via the first steel chain (3-3) and the first hook (3-5).

8. The self-floating lifting device at the end of the dam-front drift barrier according to claim 7, characterized in that, The second hand chain hoist (3-2) is connected to the other end of the steel cable (13) via the second steel chain (3-4) and the second hook (3-6).

9. A self-floating lifting device at the end of a dam-front drift barrier according to claim 8, characterized in that, The first fixed pulley (2-1) and the second fixed pulley (2-2) are fixed to the second layer of steel beams of the gantry frame (1); The first hand chain hoist (3-1) and the second hand chain hoist (3-2) are fixed on the first layer of steel beams of the gantry frame (1).

10. A self-floating lifting device at the end of a dam-front drift barrier according to claim 9, characterized in that, The first hand chain hoist (3-1) and the second hand chain hoist (3-2) are at the same height and can meet the conditions for manual operation; the first fixed pulley (2-1) and the second fixed pulley (2-2) are at the same height and the height is not lower than that of the first hand chain hoist (3-1) and the second hand chain hoist (3-2).

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