Concrete rockfill dam panel anti-icing structure
By designing a small car equipped with a submersible pump, water pressure sensor, traction machine and rope-passing board, the problem of damage to dam panels in high latitude and high altitude areas during the freezing period is solved, and a low-cost and efficient anti-icing effect is achieved to adapt to various water level changes.
Patent Information
- Application Number
- CN202421808098.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-29
AI Technical Summary
Power station dams in high latitude and high altitude areas are easily affected by freezing damage during the freezing period, resulting in damage to the concrete panel rock-stacking dam surface. The existing anti-freezing methods are costly and difficult, and difficult to adapt to water level changes.
A concrete rock dam panel anti-ice structure is designed, including a movable trolley, equipped with a submersible pump, a water pressure sensor, a traction machine and a rope-passing plate. The water temperature of the submersible pump is sprayed with a high temperature, and the depth of the moving trolley is adjusted by using a water pressure sensor and a traction machine. The rope-passing plate is used to intercept debris and intermittent water spraying is achieved through a pressing valve.
It has achieved effective prevention of icing on dam panels in high latitude and high altitude areas, reduced anti-icing costs, adapted to various water level changes, and improved anti-icing effect.
Smart Images
Figure CN222908666U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an anti-icing structure for the concrete face slab of a concrete rockfill dam, in particular to an anti-icing structure for the concrete face slab of a concrete rockfill dam used in a hydropower station. Background Art
[0002] A pumped-storage power station is a hydropower station that pumps water to an upper reservoir during low electricity load periods and releases the water to a lower reservoir for power generation during high electricity load periods. It is also called a storage-type hydropower station. It can convert the excess electricity during low grid loads into high-value electricity during peak grid periods, and is also suitable for frequency modulation and phase modulation to stabilize the frequency and voltage of the power system. The dam of a pumped-storage power station plays a crucial role in the operation of the power station. It can store water sources. The dam is used to form a reservoir in the upper reservoir to store the water pumped up from the lower reservoir during low electricity demand periods. This stored water is released during peak electricity demand periods to meet the electricity demand through hydropower generation. It can also store and regulate seasonal rainwater, reducing the threat of floods to downstream areas. During heavy rain or floods, the dam can store the excess water volume, reducing the flood pressure downstream.
[0003] However, power station dams located in high-latitude and high-altitude areas will encounter long freezing periods. During the freezing period, relatively thick ice layers will form in the reservoir. When the ice layer reaches a certain thickness, the concrete face slab of the concrete rockfill dam will be subjected to freezing hazards such as ice jacking force and ice pressure. The acting force may tear the waterstop of the dam face and damage the sealing structure, bringing potential safety hazards to the safe operation of the dam. When the panel sealing structure is damaged, the water level will be lowered in spring every year for sealing repair, which will inevitably cause waste of water resources and affect the power generation efficiency of the power station. Currently, methods such as anti-freezing ice blowing and manual ice breaking are generally used. For dams with a water level fluctuation amplitude exceeding 30 meters, the anti-freezing ice blowing system needs to set fixed gas pipelines on the panels in the variable zone, which is relatively difficult to arrange for dams that have been put into use and has a relatively high cost; while manual ice removal is difficult because the power generation of the power station has no specific pattern and the reservoir water level cannot be maintained at a certain height, resulting in continuous changes in the ice layer thickness. Sometimes there will be an empty layer, and the ice breaking work cannot be completed in time, easily causing damage to the dam. Content of the Utility Model
[0004] The purpose of the utility model is to provide an anti-icing structure for the concrete face slab of a concrete rockfill dam. It can have the advantages of convenient installation, low cost, and good anti-icing effect.
[0005] Technical solution of the utility model: An anti-icing structure for the concrete face slab of a rockfill dam, which includes a moving trolley that can move along the slope of the dam. A towing rope is provided on the upper side of the moving trolley, and the upper end of the towing rope is connected to a towing machine located on the upper side of the dam body. A water pressure sensor is provided on one side of the moving trolley; a submersible pump is provided on the upper side of the lowest end of the moving trolley, and multiple groups of water pipes connected to the submersible pump are provided on the upper side of the middle part of the moving trolley. The upper side of the water pipe is connected to a first nozzle.
[0006] In the above-mentioned anti-icing structure for the concrete face slab of a rockfill dam, a rope-passing plate that is sleeved outside the towing rope and floats on the water surface is further provided on the upper side of the water pipe. Multiple groups of push-button valves are provided in the rope-passing plate. The lower end of the push-button valve is connected to a second nozzle located on both sides of the rope-passing plate. A control mechanism for controlling the timing opening and closing of the push-button valve is provided in the middle of the push-button valve. A positioning block is provided under the rope-passing plate, and a guide rail corresponding to the positioning block is provided on the dam body.
[0007] In the above-mentioned anti-icing structure for the concrete face slab of a rockfill dam, an arc-shaped guide plate is provided at the end of the rope-passing plate away from the dam slope, and the opening of the arc-shaped guide plate faces the dam slope.
[0008] In the above-mentioned anti-icing structure for the concrete face slab of a rockfill dam, the control mechanism includes a control motor. A driving wheel is provided on the output shaft of the control motor, and top blocks corresponding to the push-button valves and symmetrically arranged are provided at both ends of the driving wheel.
[0009] In the above-mentioned anti-icing structure for the concrete face slab of a rockfill dam, the rope-passing hole is a long strip-shaped rope-passing hole.
[0010] In the above-mentioned anti-icing structure for the concrete face slab of a rockfill dam, auxiliary wheel frames are provided on both sides of the lowest end of the moving trolley, and auxiliary wheels are provided under the auxiliary wheel frames.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] 1. In this application, the submersible pump conveys the water with a higher temperature from the deep part to the water surface, and the water is sent out through the first nozzle, so that the water surface is in a fluctuating state, preventing the occurrence of icing in front of the dam face slab;
[0013] 2. In this application, the water pressure sensor detects the depth of the moving trolley, and then transmits the information to an external controller to control the towing machine to drive the moving trolley to move along the dam slope, so that it can be applicable to the anti-icing work at various water levels;
[0014] 3. In this application, a rope-passing plate is provided to intercept the sundries on the water surface, preventing the sundries from affecting the winding of the towing rope, facilitating the adjustment of the depth of the moving trolley, having a good anti-icing effect, and a second nozzle is provided in the rope-passing plate. Through the cooperation of the control mechanism and the push-button valve, the second valve is intermittently started, making the water flow situation more diverse and the anti-icing effect better. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present utility model;
[0016] Figure 2 It is a schematic structural diagram of Embodiment 2 of the present utility model;
[0017] Figure 3 It is a schematic structural diagram of the rope threading plate of Embodiment 2 of the present utility model.
[0018] The reference signs in the drawings are: 1 - mobile trolley, 2 - towing rope, 3 - towing machine, 4 - water delivery pipe, 5 - first nozzle, 6 - submersible pump, 8 - rope threading plate, 9 - rope threading hole, 11 - push-button valve, 12 - positioning block, 13 - guide rail, 14 - second nozzle, 16 - control motor, 17 - driving wheel, 18 - top block, 19 - auxiliary wheel frame, 20 - auxiliary wheel, 21 - water pressure sensor, 22 - arc-shaped guide plate. Detailed implementation manners
[0019] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.
[0020] Embodiment 1. An anti-icing structure for the concrete face slab of a rockfill dam, the composition is as Figure 1 shown, including a mobile trolley 1 that can move along the dam slope. A towing rope 2 is provided on the upper side of the mobile trolley 1. The upper end of the towing rope 2 is connected to a towing machine 3 located on the upper side of the dam body. A water pressure sensor 21 is provided on one side of the mobile trolley 1; a submersible pump 6 is provided on the upper side of the lowermost end of the mobile trolley 1. A plurality of groups of water delivery pipes 4 connected to the submersible pump 6 are provided on the upper side of the mobile trolley 1. The upper side of the water delivery pipe 4 is connected to a first nozzle 5.
[0021] Auxiliary wheel frames 19 are provided on both sides of the lowermost end of the mobile trolley 1, and auxiliary wheels 20 are provided on the lower side of the auxiliary wheel frames 19.
[0022] Embodiment 2. As Figures 2-3 shown, on the basis of Embodiment 1, a rope threading plate 8 that is sleeved outside the towing rope 2 and floats on the water surface is further provided on the upper side of the water delivery pipe 4. The rope threading plate includes a horizontal plate, a guide plate parallel to the dam slope, a support plate parallel to the horizontal plate, and baffles on both sides. The water delivery pipe 4 conveys the warmer water below to the second nozzle 14 through a hose. A plurality of groups of push-button valves 11 are provided in the rope threading plate 8. The lower end of the push-button valve 11 is connected to the second nozzle 14 located on both sides of the rope threading plate 8. A control mechanism for controlling the timing opening and closing of the push-button valve 11 is provided in the middle of the push-button valve 11. A positioning block 12 is provided below the rope threading plate 8, and a guide rail 13 corresponding to the positioning block 12 is provided on the dam body.
[0023] An arc-shaped guide plate 22 is provided at the end of the rope threading plate 8 away from the dam slope surface, and the opening of the arc-shaped guide plate 22 faces the dam slope surface.
[0024] The control mechanism includes a control motor 16. A driving wheel 17 is provided on the output shaft of the control motor 16, and top blocks 18 corresponding to and symmetrically arranged with the pressing valve 11 are provided at both ends of the driving wheel 17.
[0025] The rope threading hole 9 is a long strip-shaped rope threading hole.
[0026] Principle of the present utility model: The mobile trolley 1 of the present application can move along the dam slope surface. Auxiliary wheel frames 19 are provided on both sides of the lowermost end of the mobile trolley 1, and auxiliary wheels 20 are provided under the auxiliary wheel frames 19, which can make the mobile trolley 1 run more stably and prevent the mobile trolley 1 from tipping over. A submersible pump 6 is provided on the upper side of the lowermost end of the mobile trolley 1, which can transport the water with a higher temperature in the depth through the water delivery pipe 4 and spray it out from the first nozzle 5 and the second nozzle 12, so that the water in front of the dam is in a fluctuating turbulent state, preventing the occurrence of icing in front of the concrete rockfill dam panel. Moreover, the submersible pump 6 will increase the self-weight of the mobile trolley, so that the mobile trolley 1 will move downward under the action of gravity. A water pressure sensor 21 is provided on one side of the mobile trolley 1, which can detect the depth where the mobile trolley 1 is located. If the depth is relatively large, the water sprayed out from the first nozzle 5 cannot cause strong fluctuations on the water surface. When it is relatively shallow, the water sprayed out from the first nozzle 5 is easy to contact the external air, resulting in a temperature drop and a weakened anti-icing effect. The present application can drive the traction rope 2 to wind or unwind through the tractor 3, thereby adjusting the depth of the mobile trolley 1 to make the depth where the mobile trolley 1 is located tend to be constant, and the anti-icing effect is good. A rope threading plate 8 is sleeved outside the traction rope 2 of the present application. The rope threading plate 8 is made of a light material that can float on the water surface, such as a tough high molecular polyethylene and other materials. And an arc-shaped guide plate 22 is provided at the front end of the rope threading plate 8, which can guide sundries to both sides and prevent the water surface sundries from being convolutioned into the traction rope 2. A rope threading hole 9 is provided in the rope threading plate 8, and the traction rope 2 can move relative to the rope threading hole 9, preventing the rope threading plate 8 from affecting the up and down movement of the traction rope 2. Further, a cleaning brush can be provided in the rope threading hole 9 to avoid adhesion of sundries on the traction rope and affecting the work of the tractor. Further, a guide rail 13 can be laid on the slope surface. The guide rail 13 is a long strip-shaped guide rail, which can play a guiding and limiting role for the rope threading plate 8. The upper ends of part of the water delivery pipes 4 are connected to the pressing valve 11 in the rope threading plate 8, and the water pumped up by the bottom submersible pump 6 is sent out through the second nozzle 12. The second nozzles 12 are evenly distributed at the edge of the rope threading plate 8, and the water outlet of the second nozzle 12 is located underwater. When the control motor 16 drives the driving wheel 17 to rotate, the top block 18 will trigger the pressing valve 11 to realize the intermittent water spraying of the second nozzle, so that the water around the rope threading plate 8 fluctuates more diversely, realizing a better anti-icing effect. And due to the cooperation of the guide rail 13 and the positioning block 12, the rope threading plate 8 will not swing greatly, resulting in the traction rope 2 being wound and knotted.
Claims
1. A concrete rockfill dam panel anti-icing structure, characterized by: The invention comprises a mobile trolley (1) which can move along the slope of a dam. A traction rope (2) is provided on the upper side of the mobile trolley (1). The upper end of the traction rope (2) is connected to a traction machine (3) located on the upper side of the dam body. A water pressure sensor (21) is provided on one side of the mobile trolley (1). A submersible pump (6) is provided on the upper side of the lowermost end of the mobile trolley (1). A plurality of water pipes (4) connected to the submersible pump (6) are provided on the upper side of the middle part of the mobile trolley (1). The upper side of the water pipes (4) is connected to a first nozzle (5).
2. The anti-icing structure of concrete rockfill dam face plate according to claim 1, characterized in that: The upper side of the water pipe (4) is also provided with a rope threading plate (8) which is sleeved outside the traction rope (2) and floats on the water surface. A plurality of groups of push-type valves (11) are provided in the rope threading plate (8). The lower ends of the push-type valves (11) are connected to second nozzles (14) located on both sides of the rope threading plate (8). A control mechanism for controlling the timing opening and closing of the push-type valve (11) is provided in the middle of the push-type valve (11). A positioning block (12) is provided under the rope threading plate (8), and a guide rail (13) corresponding to the positioning block (12) is provided on the dam body.
3. The anti-icing structure of concrete rockfill dam face plate according to claim 2, characterized in that: The end of the rope threading plate (8) away from the dam slope is provided with an arc-shaped guide plate (22), and the opening of the arc-shaped guide plate (22) faces the dam slope.
4. The anti-icing structure of concrete rockfill dam face plate according to claim 2, characterized in that: The control mechanism comprises a control motor (16), a driving wheel (17) is arranged on the output shaft of the control motor (16), and top blocks (18) corresponding to and symmetrically arranged with the push-type valve (11) are arranged at both ends of the driving wheel (17).
5. The anti-icing structure of concrete rockfill dam face plate according to claim 2, characterized in that: The rope threading plate (8) is provided with a rope threading hole (9), and the rope threading hole (9) is a long strip-shaped rope threading hole.
6. The anti-icing structure of concrete rockfill dam face plate according to claim 1, characterized in that: Auxiliary wheel frames (19) are provided on both sides of the lower end of the movable vehicle (1), and auxiliary wheels (20) are provided on the lower side of the auxiliary wheel frames (19).