Anti-silt hydraulic jacking auxiliary device for plane gate
By installing a hydraulic lifting auxiliary device on the plane gate and using a hydraulic telescopic rod to lift the gate, the problem of failure of door opening due to serious sand silt is solved, and the effect of safe door opening and sand cleaning is achieved.
Patent Information
- Application Number
- CN202420024024.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-04
AI Technical Summary
In hydropower station projects, severe silt in front of the plane gate door, resulting in insufficient capacity of the opening and closing machine, which may lead to failure of the opening and closing machine or even damage the opening and closing machine.
Design an anti-silt hydraulic hoisting auxiliary device for flat gates, including hydraulic telescopic rods, guide seats and support plates. With the cooperation of the opening and closing machine, the hydraulic telescopic rods lift the gate for a certain distance, so as to realize the gate opening and closing time. Flush the sand and clear the silt.
Through the use of hydraulic hoisting device, the door opening load can be reduced when the sand is severe, the door opening safety can be ensured, and the vicious cycle caused by the inability to open the door is avoided. It significantly improves the cleaning of the sand and the reduction of the load of the machine Effect.
Smart Images
Figure CN222435212U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plane gates of water conservancy and hydropower engineering, and in particular relates to an anti-silting hydraulic jacking auxiliary device for plane gates. Background Art
[0002] In hydropower station projects, siltation in front of the gate is an inevitable problem during the operation of the power station. Especially for rivers with high sand content and poor water quality, more attention is paid to the prevention and treatment of sediment bedload. The more common methods include arranging sand barriers at the water inlet, flushing sand through the spillway, arranging sand flushing corridors and using sand flushing gates to flush sand. Although such methods can clear the silt to a certain extent to prevent the silt from entering the runner of the turbine unit, for working gates like emptying holes, due to the long emptying and maintenance cycle of the reservoir area, long-term siltation often leads to serious siltation in front of the gate. If the margin of the design capacity of the hoist is limited, the hoist may fail to open the gate due to insufficient capacity when the silt is several meters high. In severe cases, the wire rope may even be broken, damaging the hoist. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a hydraulic jacking auxiliary device for preventing siltation for a plane gate, which can cooperate with the gate hoist to lift the gate to partially open and clear silt when there is serious siltation in front of the gate and the capacity of the gate hoist is insufficient, thereby reducing the gate opening load and ensuring the safety of gate opening.
[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: an anti-siltation hydraulic jacking auxiliary device for a plane gate, comprising a plane gate lifted vertically, the plane gate is equipped with a gate opening and closing machine for driving the lifting thereof, side beams are provided on both sides of the plane gate, at least one set of hydraulic jacking device is respectively installed in the bottom cavity of each side beam, each set of hydraulic jacking device comprises a hydraulic telescopic rod, a guide seat and a support plate, the guide seat and the support plate are fixedly connected to the side beam, the guide seat is located below the support plate, the guide seat has a vertical guide hole, the axis of the hydraulic telescopic rod is vertically arranged, The cylinder of the hydraulic telescopic rod is slidably installed in the vertical guide hole, and the upper end of the cylinder is provided with a suspension limiter to prevent the hydraulic telescopic rod from escaping from the vertical guide hole. When the hydraulic telescopic rod is in a retracted state, the overall axial length of the hydraulic telescopic rod is not greater than the vertical spacing between the lower end surface of the support plate and the lower end surface of the plane gate. When the hydraulic telescopic rod is in an extended state, the overall axial length of the hydraulic telescopic rod is greater than the vertical spacing between the lower end surface of the support plate and the lower end surface of the plane gate. The upper end of the hydraulic telescopic rod can abut against the support plate, and the lower end of the hydraulic telescopic rod can extend out of the bottom end surface of the side beam.
[0005] A further preferred solution is that the guide seat comprises a positioning hole plate and a locking hole plate which are arranged at intervals, and both the positioning hole plate and the locking hole plate have a central through hole to form a vertical guide hole of the guide seat.
[0006] A further preferred solution is: the hydraulic telescopic rod includes a cylinder, a piston rod, a piston, a sealing ring and a limiting ring; the lower end of the cylinder has a bottom plate with a closed structure, and the upper end is the protruding end of the piston; the sealing ring and the limiting ring are fixedly installed on the upper end of the inner wall of the cylinder, the piston is slidably installed in the cylinder, and one end of the piston rod passes through the sealing ring and the limiting ring and is fixedly connected to the piston.
[0007] A further preferred solution is that when the hydraulic telescopic rod is in an extended state, the overall axial length of the hydraulic telescopic rod is 200 mm to 300 mm greater than the vertical distance between the lower end surface of the support plate and the lower end surface of the plane gate.
[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: when the gate is seriously silted up and the hoist capacity is insufficient to open the gate safely, the hydraulic telescopic rod can be used to lift the gate as a whole for a certain distance to achieve sand flushing and silt removal after the gate is partially opened. The hydraulic lifting device is small in size and large in capacity, and can be customized according to needs. It is arranged in the gate body without taking up space, has good stability, can act underwater for a long time, and is simple and convenient to operate. The utility model effectively avoids the vicious cycle of not being able to open the gate due to siltation, and not opening the gate leads to more serious siltation. It has significant effects on solving the problem of cleaning silt in front of the gate, reducing the load of the hoist opening the gate, increasing the safety of opening and closing, and saving engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0010] Figure 2 It is a schematic diagram of the hydraulic jacking device in the utility model in the process of descending into position along with the plane gate;
[0011] Figure 3 It is a schematic diagram of the hydraulic jacking device of the utility model when it is not working (the plane gate is in a closed state).
[0012] Figure 4 It is a schematic diagram of the hydraulic jacking device of the utility model during jacking operation.
[0013] Marked in the figure are: hydraulic jacking device 1, positioning hole plate 2, locking hole plate 3, plane gate 4, support plate 11, cylinder 12, piston rod 13, piston 14, suspension limiter 15, sealing ring 16, limit ring 17, hydraulic pipeline 18. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] See also Figures 1 to 4 The utility model includes a plane gate 4 that is lifted vertically. The plane gate 4 is equipped with a gate hoist for driving the lifting thereof. The plane gate 4 has side beams on both sides. At least one set of hydraulic jacking device 1 is installed in the bottom cavity of each side beam (the installation position of the hydraulic jacking device 1 can be any position as long as it does not affect the normal guiding cooperation between the side beam and the gate groove). Each set of hydraulic jacking device 1 includes a hydraulic telescopic rod, a guide seat and a support plate 11. The guide seat and the support plate 11 are fixedly connected to the side beam. The guide seat is located below the support plate 11. The guide seat has a vertical guide hole. The axis of the hydraulic telescopic rod is vertically arranged. The hydraulic telescopic rod is provided with a vertical guide hole. The cylinder 12 of the retracting rod is slidably installed in the vertical guide hole. The upper end of the cylinder 12 has a suspension limiter 15 to prevent the hydraulic telescopic rod from escaping from the vertical guide hole. When the hydraulic telescopic rod is in a retracted state, the overall axial length of the hydraulic telescopic rod is not greater than the vertical spacing between the lower end surface of the support plate 11 and the lower end surface of the plane gate 4. When the hydraulic telescopic rod is in an extended state, the overall axial length of the hydraulic telescopic rod is greater than the vertical spacing between the lower end surface of the support plate 11 and the lower end surface of the plane gate 4. The upper end of the hydraulic telescopic rod can abut against the support plate 11, and the lower end of the hydraulic telescopic rod can extend out of the bottom end surface of the side beam.
[0016] The guide seat can be an integral structure or a partition-type split structure. To make the structure simple and easy to implement, the guide seat preferably adopts a positioning hole plate 2 and a locking hole plate 3 arranged at intervals. The positioning hole plate 2 and the locking hole plate 3 both have a central through hole to form a vertical guide hole of the guide seat. In specific implementation, the positioning hole plate 2, the locking hole plate 3 and the support plate 11 can all be implemented by welding and fixing.
[0017] The suspension limiter 15 can be fixedly connected (for example, directly welded to the upper end of the outer wall of the cylinder 12), or movably connected (for example, sleeved on the outer periphery of the cylinder 12 in the form of a slip ring, and the outer periphery of the cylinder 12 is correspondingly provided with a groove as a guide groove of the slip ring, and the end of the guide groove is the travel limit structure of the slip ring). The embodiment shown in the drawings adopts the form of a slip ring.
[0018] In order to make the structure simple and reliable, the hydraulic telescopic rod generally includes a cylinder 12, a piston rod 13, a piston 14, a sealing ring 16 and a limiting ring 17. The lower end of the cylinder 12 has a bottom plate of a closed structure, and the upper end is a piston extension end; the sealing ring 16 and the limiting ring 17 are fixedly installed on the upper end of the inner wall of the cylinder 12, and the piston 14 is slidably installed in the cylinder 12. One end of the piston rod 13 passes through the sealing ring 16 and the limiting ring 17 and is fixedly connected to the piston 14. It can be understood that the hydraulic telescopic rod needs to be provided with necessary hydraulic pipelines 18. The structural design of the hydraulic pipeline 18 should not interfere with the movement process of the hydraulic jacking device 1. According to the size and stroke of the hydraulic pipeline 18, holes can be opened on the corresponding sides of the positioning orifice plate 2 and the locking orifice plate 3 to avoid interference; at the same time, a hose or a sliding sleeve is added at a suitable position to meet the vertical movement requirements of the cylinder 12. The dam top hydraulic system of the hydraulic telescopic rod can be designed independently or in combination with the hoist, preferably in combination with the hoist.
[0019] See also Figure 2 When the hydraulic lifting device 1 is lowered into position with the plane gate 4, the hydraulic telescopic rod is initially in a retracted state, and the suspension limiter 15 and the positioning guide seat provide a limit function, driving the hydraulic lifting device 1 to fall onto the bottom sill of the gate slot. When the hydraulic lifting device 1 is in position with the plane gate 4, the main body of the plane gate 4 is in a water-blocking and silting state, and the bottom end of the hydraulic telescopic rod is in a natural contact state with the bottom sill of the gate slot. The hydraulic telescopic rod is not pressed and does not work. For details, see Figure 3 .
[0020] When the gate needs to be opened to flush sand or empty the reservoir area due to long-term water retention and siltation, considering the serious siltation in front of the gate and the limited margin of the design capacity of the gate hoist, in the case of several meters of siltation, in order to avoid the failure of opening the gate due to insufficient capacity of the gate hoist, or even the breaking of the wire rope to damage the gate hoist, the hydraulic jacking device 1, in cooperation with the gate hoist, controls the left and right sets of hydraulic jacking devices 1 to lift the plane gate 4 according to the stroke requirements of the partial opening through the hydraulic pump station set on the top of the dam. After the gate is opened with a small opening, the upstream water flow pressure is used to flush sand and silt, reduce the sediment load in front of the gate, and ensure the safety of opening the gate. In this embodiment, the partial opening stroke is preferably 200mm~300mm (that is, when the hydraulic telescopic rod is in an extended state, the overall axial length of the hydraulic telescopic rod is 200mm~300mm larger than the vertical spacing between the lower end face of the support plate 11 and the lower end face of the plane gate 4). The specific stroke can be further estimated and determined according to the actual working conditions and siltation conditions. For details of the specific jacking process, see Figure 4 .
Claims
1. A hydraulic lifting auxiliary device for preventing siltation of a plane gate, comprising a plane gate (4) that is lifted and lowered vertically, the plane gate (4) being provided with a hoist for driving the lifting and lowering thereof, and having side beams on both sides of the plane gate (4), characterized in that: At least one set of hydraulic lifting devices (1) is installed in the bottom cavity of each side beam, and each set of hydraulic lifting devices (1) comprises a hydraulic telescopic rod, a guide seat and a support plate (11). The guide seat and the support plate (11) are fixedly connected to the side beam, the guide seat is located below the support plate (11), the guide seat has a vertical guide hole, the axis of the hydraulic telescopic rod is vertically arranged, the cylinder barrel (12) of the hydraulic telescopic rod is slidably installed in the vertical guide hole, and the upper end of the cylinder barrel (12) has a cap to prevent the hydraulic telescopic rod from falling out of the vertical guide hole. The hydraulic telescopic rod is provided with a suspension limiter (15) which is separated from the support plate (11). When the hydraulic telescopic rod is in a retracted state, the overall axial length of the hydraulic telescopic rod is not greater than the vertical distance between the lower end surface of the support plate (11) and the lower end surface of the plane gate (4). When the hydraulic telescopic rod is in an extended state, the overall axial length of the hydraulic telescopic rod is greater than the vertical distance between the lower end surface of the support plate (11) and the lower end surface of the plane gate (4). The upper end of the hydraulic telescopic rod can abut against the support plate (11), and the lower end of the hydraulic telescopic rod can extend out of the bottom end surface of the side beam.
2. The anti-silting hydraulic lifting auxiliary device for a plane gate according to claim 1, characterized in that: The guide seat comprises a positioning hole plate (2) and a locking hole plate (3) which are arranged at intervals. Both the positioning hole plate (2) and the locking hole plate (3) have a central through hole to form a vertical guide hole of the guide seat.
3. The anti-silting hydraulic lifting auxiliary device for a plane gate according to claim 1, characterized in that: The hydraulic telescopic rod comprises a cylinder (12), a piston rod (13), a piston (14), a sealing ring (16) and a limiting ring (17); the lower end of the cylinder (12) is provided with a bottom plate of a closed structure, and the upper end is a piston extension end; the sealing ring (16) and the limiting ring (17) are fixedly mounted on the upper end of the inner wall of the cylinder (12); the piston (14) is slidably mounted in the cylinder (12); one end of the piston rod (13) passes through the sealing ring (16) and the limiting ring (17) and is fixedly connected to the piston (14).
4. The anti-silting hydraulic lifting auxiliary device for a plane gate according to any one of claims 1 to 3, characterized in that: When the hydraulic telescopic rod is in an extended state, the overall axial length of the hydraulic telescopic rod is 200 mm to 300 mm greater than the vertical distance between the lower end surface of the support plate (11) and the lower end surface of the plane gate (4).