Self-adaptive warm water circulation curing device and method for dam concrete panel

Abstract

The dam concrete face self-adaptive warm water circulation curing device comprises a water supply unit and further comprises a water retention plate, the water supply unit comprises a water distribution device and a sedimentation tank, the water distribution device is arranged at the top of a dam, the sedimentation tank is arranged on the lower side of a concrete face, and the water retention plate is laid on the concrete face on the surface of the dam; the water distribution device comprises a water distribution tank and a water distribution pipe, a water supplementing pipe is arranged on the water distribution tank, a first control valve is arranged on the water supplementing pipe, the water distribution pipe is connected to the lower side of the water distribution tank, and a plurality of branch pipes are connected to the water distribution pipe; a plurality of hole channels are formed in the water retention plate, the upper ends of the hole channels are connected with the branch pipes for water supply, and the sedimentation tank collects water flowing down from the concrete face and supplies water to the water distribution tank through a water pump and a water return pipe. Water can be uniformly permeated and distributed through the water retention plates, sunlight heat is absorbed through the water retention plates, maintenance water is heated, the heated water is recycled through the sedimentation tank for cyclic utilization, water resource waste is reduced, and traditional electric heating energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering construction technology, and in particular to an adaptive warm water circulation curing device and method for dam concrete panels. Background Technology

[0002] The concrete face of a dam is a critical seepage prevention structure for hydropower stations and reservoirs; cracks in it can seriously affect the safe operation of the dam. Concrete face panels are susceptible to hydration heat, drying shrinkage, and temperature deformation, making them prone to cracking. A proper water curing plan can minimize the risk of cracking.

[0003] Existing concrete panel curing technologies for dams lack a water circulation system. Curing water is discharged directly into the reservoir after a single use. Since the curing process occurs before water storage, most of the curing water evaporates, resulting in water waste. For example, the intelligent system and control and curing method for panel curing in water level fluctuation zones disclosed in Chinese patent document CN110055970A employs this approach.

[0004] In regions with significant diurnal temperature variations, such as Xinjiang, nighttime curing requires heating the curing water, and the hot water used for curing is then directly discharged, resulting in energy waste. To address this, we propose an adaptive warm water circulation curing device and method for dam concrete panels, as described in this application. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the problems existing in the background art and provide an adaptive warm water circulation curing device and method for dam concrete panels. The device and method can uniformly distribute water through a water-retaining plate and absorb solar heat through the water-retaining plate. The heated water is then recycled through a sedimentation tank, reducing water waste and lowering the energy consumption of traditional electric heating.

[0006] To achieve the above-mentioned technical features, the present invention aims to provide an adaptive warm water circulation curing device for dam concrete panels, comprising a water supply unit and a water-retaining plate. The water supply unit includes a water distribution device and a settling tank. The water distribution device is located at the top of the dam, the settling tank is located on the lower side of the concrete panel, and the water-retaining plate is laid on the concrete panel on the surface of the dam. The water distribution device includes a water distribution tank and a water distribution pipe. A water supply pipe is provided on the water distribution tank, and a first control valve is provided on the water supply pipe. The water distribution pipe is connected to the lower side of the water distribution tank and has multiple branch pipes connected to it. The water-retaining plate has multiple channels, the upper ends of which are connected to the branch pipes for water supply. The settling tank collects water flowing down from the concrete panel and supplies water to the water distribution tank through a water pump and a return water pipe.

[0007] The water-retaining board includes a heat-absorbing and water-insulating layer and a water-releasing layer. The heat-absorbing and water-insulating layer is installed on top of the water-releasing layer, and the water-releasing layer is in contact with the concrete panel. The ducts are located inside the water-releasing layer.

[0008] The heat-absorbing and water-insulating layer is a water-repellent non-woven material, and the water-releasing layer is a water-absorbing porous material.

[0009] A pump forebay is also provided on the outer side of the bottom of the dam. The upper side of the pump forebay and the sedimentation tank are connected by a connecting pipe. One end of the return water pipe is connected to the pump forebay, and the pump is installed on the return water pipe. A warm water tank is also provided on the top of the dam. The other end of the return water pipe is connected to the warm water tank. The warm water tank is equipped with a water supply pipe, which is connected to the water distribution tank. A second control valve is installed on the water supply pipe.

[0010] The water distribution tank is equipped with a heating device, which is used to heat the water in the water distribution tank.

[0011] A flow control valve is installed on the branch pipe.

[0012] The water-retaining board is composed of multiple pieces spliced ​​together. The channels inside the water-retaining board are longitudinal straight holes, longitudinal wavy structures, longitudinal spiral structures, or longitudinal and transverse connected structures. When the channels adopt longitudinal straight hole structures, longitudinal wavy structures, or longitudinal spiral structures, the water-retaining board is fitted with plugs at the lower end of the concrete panel. When the channels adopt longitudinal and transverse connected structures, the water-retaining board is fitted with plugs at the left and right ends and the lower end of the concrete panel.

[0013] The edge of the water-retaining board is provided with locking blocks and slots. The locking blocks of adjacent water-retaining boards are inserted into the slots, thereby splicing and covering the entire concrete panel.

[0014] It also includes a control system, which includes a controller and a first temperature sensor, a second temperature sensor, a third temperature sensor, a first liquid level sensor, a second liquid level sensor, a third liquid level sensor, and a fourth temperature sensor, all electrically connected to the controller. The first temperature sensor is used to detect the temperature of the dam. The second temperature sensor and the first liquid level sensor are installed in the water distribution tank. The third temperature sensor and the second liquid level sensor are installed in the warm water pool. The third liquid level sensor is installed in the forebay of the water pump. The fourth temperature sensor is used to detect the temperature of the concrete panel. The first control valve, the second control valve, and the water pump are all electrically connected to the controller for control.

[0015] A method for adaptive warm water circulation curing of dam concrete panels, employing the aforementioned adaptive warm water circulation curing device for dam concrete panels, includes the following steps: S1. Install a water distribution device at the top of the dam, set up a settling pool and a pump forebay at the bottom of the concrete panel of the dam, install a water pump and a return water pipe, and after the concrete panel is poured to meet the construction conditions, lay a water-retaining board on the concrete panel. After the water-retaining board is laid, connect the branch pipe to the hole at the top of the water-retaining board and connect the water supply pipe to the tap water pipe. S2. In the early stage of curing, open the first control valve, and water enters the water distribution tank, then through the water distribution pipe and branch pipe, and then through the water replenishment pipe into each channel; the water-retaining board absorbs water from the edge of the channel, and the water at the bottom of the water-retaining board soaks the concrete panel for curing, while the water at the top of the water-retaining board absorbs the heat from the sun, and the heat is gradually conducted downward to the concrete panel. S3. The heated water flows to the bottom of the concrete panel and is finally collected in the settling tank. After sedimentation, the water flows into the pump forebay. The third level sensor detects the water level in the pump forebay, and the second level sensor detects the water level in the warm water tank. When the water level in the pump forebay is higher than the low water level and the water level in the warm water tank has not reached the high water level, the controller controls the pump to start and pump water into the warm water tank. When the water level in the pump forebay is lower than the low water level, or the water level in the warm water tank reaches the high water level, the controller controls the pump to stop. The controller controls the first control valve to close until the water levels in the pump forebay, the warm water tank, and the distribution tank meet the circulation requirements. When the temperature of the concrete panel is higher than that of the dam, if the temperature of the water in the warm water pool is not greater than the sum of the internal temperature of the dam and the allowable temperature difference, the second control valve is opened to supply water to the water distribution tank. The water flows through the water-retaining plate to cool the concrete panel and reduce the temperature difference between the concrete panel and the inside of the dam. When the temperature of the concrete panel is higher than that of the dam, if the water temperature in the warm water pool is greater than the sum of the internal temperature of the dam and the allowable temperature difference, then the second control valve and the first control valve are opened to supply water to the distribution tank so that the water temperature in the distribution tank is lower than the sum of the internal temperature of the dam and the allowable temperature difference; if both the warm water pool and the pump forebay are full, and the water temperature in the warm water pool is still greater than the sum of the internal temperature of the dam and the allowable temperature difference, then the second control valve is opened, and only the first control valve is opened to provide fresh cold water. When the temperature of the concrete panel is lower than that of the dam, if the temperature of the warm water pool is not less than the difference between the internal temperature of the dam and the allowable temperature difference, the second control valve is opened for curing to increase the surface temperature of the panel. If the temperature of the concrete panel is lower than the temperature of the dam, and the temperature of the water in the warm water pool is less than the difference between the internal temperature of the dam and the allowable temperature difference, then the water in the distribution tank or the warm water pool will be heated. The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: 1. This invention combines a water-retaining board, a water distribution device, and a temperature difference control scheme to fully utilize the heating effect of large-area sunlight during the day, achieving low-energy consumption, high-efficiency, and easy-to-construct wet curing of concrete panels. It solves the technical problems of existing curing methods, such as high energy consumption, water waste, insufficient temperature difference control, uneven watering, and cumbersome system deployment. The water-retaining board allows for uniform water penetration and distribution, and absorbs solar heat to heat the curing water. The heated water is then recycled through a sedimentation tank, reducing water waste and lowering the energy consumption of traditional electric heating.

[0016] 2. Closed-loop water recycling system: The system is designed with a complete recycling chain, including "water injection into the distribution device - water retention plate permeation - sedimentation tank purification - water pump lifting - warm water tank", which significantly improves water resource utilization. Even if electric heating is necessary at night, heat can be largely recovered through the circulating maintenance system.

[0017] 4. Dynamic temperature difference control strategy: Based on the temperature difference threshold between the concrete panel and the inside of the dam, the system automatically switches between a "fresh cold water / circulating warm water" dual-pipeline water supply mode to achieve precise temperature control of "cooling during the day and keeping warm at night".

[0018] 5. Standardized and easily assembled / disassembled components: For the water-retaining board, a modular structure of heat-absorbing and water-insulating layer + sponge layer + through-hole structure is adopted, supporting optimized design of corrugated, lateral flow, spliced ​​hole type, or water-retaining board shape, effectively reducing warm water evaporation loss, reducing solar radiation, and improving the uniformity of curing water coverage. For the water distribution device, only one water distribution pipe needs to be installed on the dam top. When the span is large, it can also be spliced ​​from several standard short pipes. It is quick to assemble and disassemble and can be moved at any time during the construction of different panels.

[0019] 6. Intelligent control scheme: Through the control system, fully automated control of water pump start-up and shutdown, flow regulation, and heater linkage can be realized. Attached Figure Description

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0021] Figure 1 This is a schematic diagram of the overall structure of the invention.

[0022] Figure 2 This is a schematic diagram of the water distribution device of the present invention.

[0023] Figure 3 This is a schematic diagram of the first structure of the water-retaining board of the present invention.

[0024] Figure 4 This is a schematic diagram of the second structure of the water-retaining board of the present invention.

[0025] Figure 5 This is a schematic diagram of the third structure of the water-retaining board of the present invention.

[0026] Figure 6 This is a schematic diagram of the fourth structure of the water-retaining board of the present invention.

[0027] Figure label: Dam 1, concrete panel 2; 10. Water-retaining board; 11. Heat-absorbing and water-insulating layer; 12. Water-releasing layer; 13. Channel; 14. Plug; 15. Locking block; 16. Locking groove. Water distribution device 20, water distribution tank 21, water supply pipe 22, first control valve 221, water distribution pipe 23, branch pipe 24, heating device 25, flow control valve 26.

[0028] Sedimentation tank 30, connecting pipe 31; 40 forebay for pumps, 41 gate valve, 42 pump, 43 return pipe; 50 warm water tank, 51 water supply pipe, 52 second control valve, 53 overflow pipe; The system includes a control system 60, a controller 61, a first temperature sensor 62, a second temperature sensor 63, a third temperature sensor 64, a first liquid level sensor 65, a second liquid level sensor 66, a third liquid level sensor 67, and a fourth temperature sensor 68. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0031] Example 1: See Figure 1-6 An adaptive temperature water circulation curing device for dam concrete panels includes a water supply unit and a water-retaining plate 10. The water supply unit includes a water distribution device 20 and a settling tank 30. The water distribution device 20 is located at the top of the dam 1, and the settling tank 30 is located on the lower side of the concrete panel 2. The water-retaining plate 10 is laid on the concrete panel 2 on the surface of the dam 1. The water distribution device 20 includes a water distribution tank 21 and a water distribution pipe 23. A water supply pipe 22 is provided on the water distribution tank 21, and a first control valve 221 is provided on the water supply pipe 22. The water distribution pipe 23 is connected to the lower side of the water distribution tank 21, and multiple branch pipes 24 are connected to the water distribution pipe 23. Multiple channels 13 are provided in the water-retaining plate 10. The upper end of the channels 13 is connected to the branch pipes 24 for water supply. The settling tank 30 collects the water flowing down from the concrete panel 2 and supplies water to the water distribution tank 21 through a water pump 42 and a return water pipe 43.

[0032] The water-retaining board allows for even water distribution and absorbs solar heat to heat the water. The heated water is then recycled through a sedimentation tank, reducing water waste and lowering the energy consumption of traditional electric heating.

[0033] Settlement pool 30 is excavated on the concrete panel 2 of dam 1. Water is injected into the water-retaining plate 6 through the branch pipe 24 of the water distribution device 20. Water seeps out from the bottom of the dam and flows into the settling pool 30. The water in the settling pool 30 is then pumped to the water distribution tank 21 through the water pump 42 and the return water pipe 43 to achieve water circulation.

[0034] During the day when there is ample sunlight, the water-retaining board absorbs heat from the sun, and the curing water gradually absorbs heat and rises in temperature during the circulation process. At night when the temperature drops, it continuously provides heat preservation and curing for the concrete panel 2. The curing water is recycled, reducing water waste, and the use of the water-retaining board to absorb heat from the sun reduces the energy consumption of traditional electric heating.

[0035] In this embodiment, see Figure 2 The water-retaining board 10 includes a heat-absorbing and water-insulating layer 11 and a water-releasing layer 12. The heat-absorbing and water-insulating layer 11 is installed on top of the water-releasing layer 12, and the water-releasing layer 12 is in contact with the concrete panel 2. Channels 13 are located within the water-releasing layer 12. The heat-absorbing and water-insulating layer 11 absorbs heat from sunlight and prevents moisture evaporation. The water-releasing layer 12 allows curing water to permeate evenly through the channels 13.

[0036] In this embodiment, the heat-absorbing and water-insulating layer 11 is a water-repellent nonwoven material, and the water-releasing layer 12 is a water-absorbing porous material.

[0037] Specifically, the heat-absorbing and water-repellent layer 11 is made of a dark-colored water-repellent nonwoven material processed from nylon or polyester. The water-releasing layer 12 is made of polyethylene, polypropylene, or polyurethane through a foaming process.

[0038] The channel 13 is a through-type channel inside the water release layer 12, formed by occupying space in the mold for manufacturing the water release layer 12. During use, the curing water supplied from the branch pipe 24 forms a flow network within the channel 13, and the water release layer 12 absorbs moisture from the edges of the channel 13. The moisture at the bottom of the water release layer 12 wets the dam surface for curing, while the moisture at the top of the water release layer 12 absorbs solar heat from the heat-absorbing insulating layer 11, and the heat is gradually conducted downwards to the dam surface.

[0039] Furthermore, a flow control valve 26 is installed on branch pipe 24 to control the flow rate of branch pipe 24, making the water flow in each branch pipe 24 more even. The flow control valve 26 can be an electronic flow control valve or a conventional gate valve. The flow control valve 26 is not only used to control the flow rate, but can also close the corresponding branch pipe 24 as needed.

[0040] The settling tank 30 needs to be excavated or enclosed along the toe slab of the dam. The bottom of the tank on the side of the toe slab should be deepened, or the bottom of the tank on the opposite side of the toe slab should be raised so that the slag and stones left by the maintenance water on the panel are deposited on the side of the toe slab and cleaned regularly. The clean water on the opposite side of the toe slab overflows into the fore-pool 40 of the water pump, and water treatment equipment such as filtration can be added in the middle.

[0041] Example 2: Based on Example 1, see Figure 1 A pump forebay 40 is also provided on the outer side of the bottom of the dam 1. The upper side of the pump forebay 40 and the sedimentation tank 30 are connected by a connecting pipe 31. One end of the return water pipe 43 is connected to the pump forebay 40, and the pump 42 is installed on the return water pipe 43. A warm water pool 50 is also provided on the top of the dam 1. The other end of the return water pipe 43 is connected to the warm water pool 50. The warm water pool 50 is provided with a water supply pipe 51, which is connected to the water distribution tank 21. A second control valve 52 is installed on the water supply pipe 51.

[0042] The purified water at the top of the settling tank 30 is injected into the forebay 40 via the connecting pipe 31. When the water level meets the requirements, it is pumped to the warm water pool 50 at the top of the dam via the pump 42 and the return water pipe 43. When the water temperature in the warm water pool 50 is low, it re-enters the curing cycle via the supply pipe 51. When the water level in the warm water pool 50 is high, it can be discharged directly along the concrete panel 2 via the overflow pipe 53 and flow into the settling tank 30. When the water level in the settling tank 30 is high, it overflows directly into the reservoir, forming wastewater. The warm water pool 50 is an insulated pool, which also serves a heat preservation function. During the day when there is sufficient sunlight, the water temperature is low during water circulation curing, which cools the concrete panel 2 while the curing water temperature rises. At night when the temperature is low, the water in the warm water pool 50 can circulate again for heat preservation curing, keeping the curing temperature of the concrete panel 2 within a suitable range.

[0043] For ease of maintenance, a gate valve 41 is also installed on the return water pipe 43 at the front end of the water pump 42.

[0044] Example 3: Based on Example 1 or Example 2, see Figure 1 A heating device 25 is installed inside the water distribution tank 21. The heating device 25 is used to heat the water in the water distribution tank 21. When the water temperature in the water distribution tank 21 is insufficient, the heating device 25 will heat it. The heating device 25 can be an electric heater or a heat exchanger.

[0045] Example 4: Based on Example 1, 2, or 3, see [link to example]. Figure 3 , 45, 6. The water-retaining board 10 is composed of multiple pieces spliced ​​together. The channels 13 inside the water-retaining board 10 are longitudinal straight holes, longitudinal wave structures, longitudinal spiral structures, or longitudinal and transverse connected structures. When the channels 13 adopt longitudinal straight hole structures, longitudinal wave structures, or longitudinal spiral structures, the water-retaining board 10 is fitted with plugs 14 at the lower end of the concrete panel 2. When the channels 13 adopt longitudinal and transverse connected structures, the water-retaining board 10 is fitted with plugs 14 at the left and right ends and the lower end of the concrete panel 2.

[0046] Specifically, in order to improve the wetting effect of the channel 13 on the water release layer 12, the water-retaining plate 10 can adopt a variety of designs. This invention provides four solutions, see [link to relevant documentation]. Figure 3 The channels 13 within the water-retaining plate 10 adopt a longitudinal straight-hole structure. (See also...) Figure 4 The channels 13 within the water-retaining plate 10 employ a wave-like or spiral structure. This type of channel has a wider distribution within a single water-retaining plate, which can improve the uniformity of water absorption within the water-releasing layer 12. See also... Figure 5 , 6 The channels 13 inside the water-retaining plate 10 adopt a longitudinal and transverse connection structure. The design of the transverse flow connection mechanism can improve the consistency and stability of the water content between different transverse water-retaining plates.

[0047] Further, see Figure 6 The edge of the water-retaining board 10 is provided with locking blocks 15 and locking grooves 16. The locking blocks 15 of adjacent water-retaining boards 10 are inserted into the locking grooves 16, thereby splicing and covering the entire concrete panel 2. Since gaps are easily generated between water-retaining boards, the panel at the gaps may not be sufficiently wetted. Using spliced ​​water-retaining boards can significantly reduce the gap area and greatly reduce the blind spots of panel wetting.

[0048] Example 5: Based on embodiments 1, 2, 3, or 4, the present invention further includes a control system 60. The control system 60 includes a controller 61 and four temperature sensors electrically connected to the controller 61: a first temperature sensor 62, a second temperature sensor 63, a third temperature sensor 64, a first liquid level sensor 65, a second liquid level sensor 66, a third liquid level sensor 67, and a fourth temperature sensor 68. The first temperature sensor 62 detects the temperature of the dam 1. The second temperature sensor 63 and the first liquid level sensor 65 are installed in the water distribution tank 21. The third temperature sensor 64 and the second liquid level sensor 66 are installed in the warm water pool 50. The third liquid level sensor 67 is installed in the forebay 40 of the water pump. The fourth temperature sensor 68 detects the temperature of the concrete panel 2. The first control valve 221, the second control valve 52, and the water pump 42 are electrically connected to the controller 61 for control. Automatic control can be achieved through the above structure.

[0049] Example 6: This invention also proposes an adaptive warm water circulation curing method for dam concrete panels. This curing method uses an adaptive warm water circulation curing device for dam concrete panels as described in Example 5, and the curing method includes the following steps: S1. A water distribution device 20 is installed on the top of the dam 1. A sedimentation tank 30 and a pump forebay 40 are set at the bottom of the concrete panel 2 of the dam 1. A water pump 42 and a return water pipe 43 are installed. After the concrete panel 2 is poured to meet the construction conditions, generally more than 3 days later, a water-retaining board 10 is laid on the concrete panel 2. After the water-retaining board 10 is laid, the branch pipe 24 is connected to the hole 13 at the upper end of the water-retaining board 10, and the water supply pipe 22 is connected to the tap water pipe.

[0050] S2. In the early stage of curing, the first control valve 221 is opened, and water enters the water distribution tank 21, then through the water distribution pipe 23 and the branch pipe 24, and then through the water replenishment pipe 22 into each channel 13; the water-retaining board 10 absorbs water from the edge of the channel 13, and the water at the bottom of the water-retaining board 10 soaks the concrete panel 2 for curing, and the water at the top of the water-retaining board 10 absorbs the heat of the sun, and the heat is gradually conducted downward to the concrete panel 2.

[0051] S3. The heated water flows to the bottom of the concrete panel 2 and is finally collected in the sedimentation tank 30. After sedimentation, the water flows into the pump forebay 40. The third level sensor 67 detects the water level in the pump forebay 40, and the second level sensor 66 detects the water level in the warm water tank 50. When the water level in the pump forebay 40 is higher than the low water level and the water level in the warm water tank 50 has not reached the high water level, the controller 61 controls the pump 42 to start and pump water into the warm water tank 50. When the water level in the pump forebay 40 is lower than the low water level, or the water level in the warm water tank 50 reaches the high water level, the controller 61 controls the pump 42 to stop running. Until the water levels in the pump forebay 40, the warm water tank 50, and the water distribution tank 21 meet the circulation requirements, the controller 61 controls the first control valve 221 to close.

[0052] When there is sufficient sunlight during the day, the temperature of the concrete panel 2 is higher than that of the dam 1. If the water temperature in the warm water pool 50 is not greater than the sum of the internal temperature of the dam 1 and the allowable temperature difference, the second control valve 52 is opened to supply water to the water distribution tank 21. The water flows through the water-retaining plate 10 to cool the concrete panel 2 and reduce the temperature difference between the concrete panel 2 and the inside of the dam 1. Usually, the allowable temperature difference is selected as 15℃.

[0053] When there is sufficient sunlight during the day, if the temperature of the concrete panel 2 is higher than that of the dam 1, and the water temperature in the warm water pool 50 is greater than the sum of the internal temperature of the dam 1 and the allowable temperature difference, then the second control valve 52 and the first control valve 221 are opened to supply water to the water distribution tank 21, so that the water temperature in the water distribution tank 21 is lower than the sum of the internal temperature of the dam 1 and the allowable temperature difference; if both the warm water pool 50 and the pump forebay 40 are full, and the water temperature in the warm water pool 50 is still greater than the sum of the internal temperature of the dam 1 and the allowable temperature difference, then the second control valve 52 opens only the first control valve 221 to provide fresh cold water; normally, the allowable temperature difference is 15℃.

[0054] At night, when the temperature of the concrete panel 2 is lower than that of the dam 1, if the water temperature of the warm water pool 50 is not less than the difference between the internal temperature of the dam 1 and the allowable temperature difference, the second control valve 52 is opened for curing to increase the surface temperature of the panel.

[0055] At night, when the temperature of the concrete panel 2 is lower than that of the dam 1, if the water temperature in the warm water pool 50 is less than the difference between the internal temperature of the dam 1 and the allowable temperature difference, the water in the distribution tank 21 or the warm water pool 50 will be heated. When sunlight is insufficient during the day, the temperature of concrete panel 2 is approximately equal to that of dam 1. In this case, circulating water curing is insufficient for effective heat storage. Therefore, the unit time cost of circulating curing and fresh water curing is calculated, and the lower-cost strategy is chosen, generally fresh water curing.

[0056] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the invention. Modifications and variations made by those skilled in the art in accordance with the spirit of the invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A self-adaptive hot water circulation curing device for dam concrete panels, comprising a water supply unit, characterized in that: It also includes a water-retaining board (10). The water supply unit includes a water distribution device (20) and a sedimentation tank (30). The water distribution device (20) is located on the top of the dam (1), and the sedimentation tank (30) is located on the underside of the concrete panel (2). The water-retaining board (10) is laid on the concrete panel (2) on the surface of the dam (1). The water distribution device (20) includes a water distribution tank (21) and a water distribution pipe (23). A water supply pipe (22) is installed on the water distribution tank (21). 2) A first control valve (221) is provided on the upper part, and a water distribution pipe (23) is connected to the lower side of the water distribution tank (21). Multiple branch pipes (24) are connected to the water distribution pipe (23). Multiple channels (13) are provided in the water retention plate (10). The upper end of the channel (13) is connected to the branch pipe (24) for water supply. The sedimentation tank (30) collects the water flowing down from the concrete panel (2). The sedimentation tank (30) supplies water to the water distribution tank (21) through the water pump (42) and the return water pipe (43).

2. The adaptive warm water circulation curing device for dam concrete panels according to claim 1, characterized in that: The water-retaining board (10) includes a heat-absorbing and water-insulating layer (11) and a water-releasing layer (12). The heat-absorbing and water-insulating layer (11) is installed on top of the water-releasing layer (12). The water-releasing layer (12) is in contact with the concrete panel (2). The duct (13) is located in the water-releasing layer (12).

3. The adaptive warm water circulation curing device for dam concrete panels according to claim 2, characterized in that: The heat-absorbing and water-insulating layer (11) is a water-repellent nonwoven material, and the water-releasing layer (12) is a water-absorbing porous material.

4. The adaptive hot water circulation curing device for dam concrete panels according to claim 1, characterized in that: A water pump forebay (40) is also provided on the outer side of the bottom of the dam (1). The upper side of the water pump forebay (40) and the sedimentation pool (30) are connected by a connecting pipe (31). One end of the return water pipe (43) is connected to the water pump forebay (40), and the water pump (42) is installed on the return water pipe (43). A warm water pool (50) is also provided on the top of the dam (1). The other end of the return water pipe (43) is connected to the warm water pool (50). The warm water pool (50) is provided with a water supply pipe (51), which is connected to the water distribution tank (21). A second control valve (52) is installed on the water supply pipe (51).

5. The adaptive warm water circulation curing device for dam concrete panels according to claim 1, characterized in that: The water distribution tank (21) is equipped with a heating device (25) for heating the water in the water distribution tank (21).

6. The adaptive hot water circulation curing device for dam concrete panels according to claim 1, characterized in that: A flow control valve (26) is installed on the branch pipe (24).

7. The adaptive warm water circulation curing device for dam concrete panels according to claim 1, characterized in that: The water-retaining board (10) is composed of multiple pieces. The channels (13) inside the water-retaining board (10) are longitudinal straight holes, longitudinal wave structures, longitudinal spiral structures, or longitudinal and transverse connecting structures. When the channels (13) adopt longitudinal straight hole structures, longitudinal wave structures, or longitudinal spiral structures, the water-retaining board (10) is equipped with plugs (14) at the lower end of the concrete panel (2). When the channels (13) adopt longitudinal and transverse connecting structures, the water-retaining board (10) is equipped with plugs (14) at the left and right ends and the lower end of the concrete panel (2).

8. The adaptive warm water circulation curing device for dam concrete panels according to claim 7, characterized in that: The edge of the water-retaining board (10) is provided with a locking block (15) and a locking groove (16). The locking block (15) of the adjacent water-retaining board (10) is inserted into the locking groove (16) to splice and cover the entire concrete panel (2).

9. The adaptive hot water circulation curing device for dam concrete panels according to claim 1, characterized in that: It also includes a control system (60), which includes a controller (61) and a first temperature sensor (62), a second temperature sensor (63), a third temperature sensor (64), a first liquid level sensor (65), a second liquid level sensor (66), a third liquid level sensor (67), and a fourth temperature sensor (68) that are electrically connected to the controller (61). The first temperature sensor (62) is used to detect the temperature of the dam (1). The second temperature sensor (63) and the first liquid level sensor (65) are installed in the water distribution tank (21). The third temperature sensor (64) and the second liquid level sensor (66) are installed in the warm water pool (50). The third liquid level sensor (67) is installed in the water pump forebay (40). The fourth temperature sensor (68) is used to detect the temperature of the concrete panel (2). The first control valve (221), the second control valve (52), and the water pump (42) are electrically connected to the controller (61) for control.

10. A method for adaptive warm water circulation curing of dam concrete panels, characterized in that: The self-adaptive hot water circulation curing device for dam concrete panels as described in claim 9 is used, and the curing method includes the following steps: S1. Install a water distribution device (20) on the top of the dam (1). Set a sedimentation tank (30) and a water pump forebay (40) at the bottom of the concrete panel (2) of the dam (1). Install a water pump (42) and a return water pipe (43). After the concrete panel (2) is poured to meet the construction conditions, lay a water-retaining board (10) on the concrete panel (2). After the water-retaining board (10) is laid, connect the branch pipe (24) to the hole (13) at the top of the water-retaining board (10) and connect the water supply pipe (22) to the tap water pipe. S2. In the early stage of curing, the first control valve (221) is opened, and water enters the water distribution tank (21), then through the water distribution pipe (23) and branch pipe (24), and then through the water replenishment pipe (22) into each channel (13); the water-retaining board (10) absorbs water from the edge of the channel (13), the water at the bottom of the water-retaining board (10) soaks the concrete panel (2) for curing, and the water at the top of the water-retaining board (10) absorbs the heat of the sun, and the heat is gradually conducted downward to the concrete panel (2). S3. The heated water flows to the bottom of the concrete panel (2) and is finally collected in the sedimentation tank (30). After sedimentation, the water flows into the pump forebay (40). The third liquid level sensor (67) detects the water level in the pump forebay (40), and the second liquid level sensor (66) detects the water level in the warm water tank (50). When the water level in the pump forebay (40) is higher than the low water level and the water level in the warm water tank (50) has not reached the high water level, the controller (61) controls the pump (42) to start and pump water into the warm water tank (50). When the water level in the pump forebay (40) is lower than the low water level, or the water level in the warm water tank (50) reaches the high water level, the controller (61) controls the pump (42) to stop running. Until the water levels in the pump forebay (40), the warm water tank (50) and the water distribution tank (21) meet the circulation requirements, the controller (61) controls the first control valve (221) to close. When the temperature of the concrete panel (2) is higher than that of the dam (1), if the water temperature in the warm water pool (50) is not greater than the sum of the internal temperature of the dam (1) and the allowable temperature difference, the second control valve (52) is opened to supply water to the water distribution tank (21). The water flows through the water-retaining plate (10) to cool the concrete panel (2) and reduce the temperature difference between the concrete panel (2) and the inside of the dam (1). When the temperature of the concrete panel (2) is higher than that of the dam (1), if the water temperature in the warm water pool (50) is greater than the sum of the internal temperature of the dam (1) and the allowable temperature difference, then the second control valve (52) and the first control valve (221) are opened to supply water to the water distribution tank (21) so that the water temperature in the water distribution tank (21) is lower than the sum of the internal temperature of the dam (1) and the allowable temperature difference; if the warm water pool (50) and the water pump forebay (40) are both full, and the water temperature in the warm water pool (50) is still greater than the sum of the internal temperature of the dam (1) and the allowable temperature difference, then the second control valve (52) is opened only to supply fresh cold water to the first control valve (221); When the temperature of the concrete panel (2) is lower than that of the dam (1), if the water temperature of the warm water pool (50) is not less than the difference between the internal temperature of the dam (1) and the allowable temperature difference, the second control valve (52) is opened for curing to increase the surface temperature of the panel. When the temperature of the concrete panel (2) is lower than that of the dam (1), if the temperature of the water in the warm water pool (50) is less than the difference between the internal temperature of the dam (1) and the allowable temperature difference, the water in the water distribution tank (21) or the warm water pool (50) will be heated.

Images