A multi-mode cooling system for cooling concrete pouring and a temperature control method thereof

Abstract

The invention discloses a multi-mode cooling system for cooling the temperature of poured concrete and a temperature control method thereof, comprising a pair of temperature control water tanks, an outer ring cooling pipe circulation pipeline, an inner ring cooling pipe circulation pipeline, an outer ring cooling pipe and an inner ring cooling pipe; the outer ring cooling pipe is arranged in the concrete near the surface for cooling the concrete near the outside, and the inner ring cooling pipe is arranged in the concrete for cooling the inside of the concrete; the outer ring cooling pipe circulation pipeline and the inner ring cooling pipe circulation pipeline are provided with a water supply main pipeline, a return water main pipeline, a pressure pipeline, an inner circulation pipeline and a cooling pipeline; the invention uses two sets of cooling systems running separately to cool the inside and the outside of the concrete respectively; the cooling system can timely adjust the water flow rate and water temperature of the cooling water pipe according to the temperature monitoring result, and has a heat preservation function to ensure the cooling rate of the concrete, thereby achieving a small difference in the temperature gradient between the inside and the outside, reducing the internal temperature stress, and ensuring the quality of the concrete.

Description

Technical Field

[0001] The present invention belongs to the technical field of stockpiling structures, such as structures formed by pouring or similar methods of concrete on site, with or without additional components, and specifically relates to a multi-mode cooling system and a temperature control method thereof for cooling poured concrete. Background Art

[0002] After pouring of large volume concrete, due to the release of cement hydration heat, the internal temperature will rise sharply. If cooling and temperature control are not performed, a large temperature gradient will be formed between the inside and outside of the concrete. This temperature gradient will produce tensile stress inside the concrete. When the tensile stress exceeds the tensile strength of the concrete, it will cause temperature cracks. Through cooling and temperature control, the temperature inside the concrete can be effectively reduced, the temperature gradient can be reduced, and thus the generation of temperature cracks can be prevented. There are two traditional cooling methods: continuous water flow and intermittent water flow. Continuous water flow means that water flow starts immediately after concrete pouring, and a certain water flow rate and water temperature are maintained until the internal temperature of the concrete reaches the design requirements. Intermittent water flow means that water flow starts after the internal temperature of the concrete rises to a certain level, and water flow is stopped when the temperature drops to a certain level, and this is repeated. Both cooling methods ignore the requirements for the cooling rate of concrete. On the other hand, the traditional cooling mode adopts a single-tube series layout, that is, the cooling pipe inside and on the surface of the concrete is the same. Due to the faster heat dissipation on the outer surface, this cooling method still has a large temperature gradient, which produces internal temperature stress, such as Figure 1 The figure shows the traditional cooling pipe layout. Cooling water of a certain temperature enters the inlet end of the cooling pipe. Since the outer surface of the concrete is in contact with the air, the heat dissipation capacity is much greater than the heat dissipation capacity inside the concrete. Therefore, there is a large temperature gradient between the inside of the concrete and the concrete close to the surface.

[0003] Here, a new multi-mode cooling system for cooling poured concrete needs to be designed, which can solve the large temperature gradient between the concrete inside and the concrete near the surface. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a multi-mode cooling system for cooling poured concrete and a temperature control method thereof. The multi-mode cooling system for cooling poured concrete is provided with S-shaped cooling pipes and external cooling pipes inside the concrete and near the outer surface, respectively. The inside and outer surface of the concrete are cooled separately by two sets of separately operated cooling systems. The cooling system can timely adjust the water flow rate and water temperature of the cooling water pipe according to the temperature monitoring results, and has a heat preservation function to ensure the cooling rate of the concrete, thereby achieving a small difference in the temperature gradient between the inside and the outside, reducing the internal temperature stress, and ensuring the quality of the concrete.

[0005] In order to achieve the above-mentioned object, the present invention provides a multi-mode cooling system for cooling concrete casting, comprising a pair of temperature-controlled water tanks, an outer ring cooling pipe circulation pipeline and an inner ring cooling pipe circulation pipeline respectively connected to the pair of temperature-controlled water tanks, and an outer ring cooling pipe and an inner ring cooling pipe arranged in concrete and respectively connected to the outer ring cooling pipe circulation pipeline and the inner ring cooling pipe circulation pipeline; The outer ring cooling pipe is arranged in the concrete near the surface for cooling the concrete near the outside, and the inner ring cooling pipe is arranged in the concrete for cooling the concrete; The temperature-controlled water tanks all include a water tank body, a water level detector arranged in the water tank body, a water tank temperature sensor and an electric heater; The outer ring cooling pipe circulation pipeline includes a water supply main line connected between the temperature control water tank and the outer ring cooling pipe and a water return main line connected between the outer ring cooling pipe and the temperature control water tank; The water supply main line is provided with a water pump, a flow valve, a pressure gauge, a water inlet temperature sensor, a water inlet electric ball valve and a manual ball valve in sequence; The return water main line is provided with a manual ball valve I, a return water electric ball valve, a water outlet temperature sensor, a return water filter and a return water electric ball valve I in sequence; The main water supply line is connected to a pressure line connected to a temperature-controlled water tank at the outlet of the water pump, and a pressure valve is provided on the pressure line; An internal circulation pipeline for internal circulation is connected between the water supply main pipeline and the return water main pipeline, one end of the internal circulation pipeline is connected to the water inlet end of the water inlet electric ball valve, and the other end is connected to the water outlet end of the return water electric ball valve. The internal circulation pipeline is provided with an internal circulation switching electric ball valve for closing / opening the internal circulation pipeline; The return water main line is connected to a cooling line connected to a temperature control water tank between the return water filter and the return water electric ball valve 1, and a cooling switching electric ball valve and a cooler are sequentially arranged on the cooling line; The inner ring cooling pipe circulation pipeline includes a water supply main line I connected between the temperature control water tank and the inner ring cooling pipe and a water return main line I connected between the inner ring cooling pipe and the temperature control water tank; The water supply main line I is provided with a water pump I, a flow valve I, a pressure gauge I, a water inlet temperature sensor I, a water inlet electric ball valve I and a manual ball valve II; The return water main line I is provided with a manual ball valve III, a return water electric ball valve II, a water outlet temperature sensor I, a return water filter I and a return water electric ball valve III in sequence; The main water supply line I is located at the outlet of the water pump I and is connected to a pressure line I connected to a temperature-controlled water tank, and a pressure valve I is provided on the pressure line I; An internal circulation pipeline I for internal circulation is connected between the water supply main pipeline I and the return water main pipeline I. One end of the internal circulation pipeline I is connected to the water inlet end of the water inlet electric ball valve I, and the other end is connected to the water outlet end of the return water electric ball valve II. The internal circulation pipeline I is provided with an internal circulation switching electric ball valve I for closing / opening the internal circulation pipeline I; The return water main line I is connected to a cooling line I connected to a temperature control water tank between the return water filter I and the return water electric ball valve III, and the cooling line I is sequentially provided with a cooling switching electric ball valve I and a cooler I.

[0006] Furthermore, at least two cooling layers are arranged in the concrete, and an outer ring cooling pipe and an inner ring cooling pipe are arranged in each cooling layer accordingly. A water supply branch pipe connected to each layer of outer ring cooling pipe is arranged at the outlet of the water inlet electric ball valve on the water supply main line, and a plurality of manual ball valves are arranged and are correspondingly arranged on the water supply branch pipe. A return water branch pipe connected to each layer of outer ring cooling pipe is arranged at the inlet of the return water electric ball valve on the return water main line, and a plurality of manual ball valves I are arranged and are correspondingly arranged on the water supply branch pipe. A water supply branch pipe I connected to each layer of inner ring cooling pipe is arranged at the outlet of the water inlet electric ball valve I on the water supply main line I, a plurality of manual ball valves II are arranged and are correspondingly arranged on the water supply branch pipe I, a return water branch pipe I connected to each layer of inner ring cooling pipe is arranged at the inlet of the return water electric ball valve I on the return water main line I, and a plurality of manual ball valves III are arranged and are correspondingly arranged on the water supply branch pipe I.

[0007] Furthermore, the inner ring cooling pipe is configured as an S-shaped cooling pipe, and the outer ring cooling pipe is configured as a C-shaped cooling pipe.

[0008] Furthermore, the cooling water temperature at the water inlet of the inner ring cooling pipe is lower than the cooling water temperature at the water inlet of the outer ring cooling pipe.

[0009] Furthermore, the cooling water temperature at the water outlet of the inner ring cooling pipe is higher than the cooling water temperature at the water outlet of the outer ring cooling pipe.

[0010] Furthermore, it also includes a water replenishment tank for replenishing water to the temperature-controlled water tank. The water replenishment tank is connected to a water replenishment pipeline, and the water replenishment management is provided with a water replenishment pump and a filter II.

[0011] The present invention also discloses a temperature control method for a multi-mode cooling system for cooling concrete pouring, and the control process is as follows: 1) Real-time monitoring of the temperature of each monitoring point of concrete: The temperature at different locations inside and outside the large volume concrete is monitored by the temperature monitoring system installed inside and outside the concrete, and the temperature data is transmitted to the temperature monitoring center. The cooling measures are adjusted based on the temperature monitoring data; 2) Cooling pipe layout: Two groups of cooling pipes are arranged in each layer of concrete, one group is the inner ring cooling pipe for cooling the inside of the concrete, and the other group is the outer ring cooling pipe for cooling the position close to the concrete surface. The inner ring cooling pipe and the outer ring cooling pipe are temperature-controlled and water-supplied by a pair of temperature-controlled water tanks. When cooling is performed at the same time, the cooling water temperature at the water inlet of the inner ring cooling pipe must be lower than the cooling water temperature at the water inlet of the outer ring cooling pipe; 3) Control the cooling speed: According to the temperature monitoring results, timely adjust the water flow rate and water temperature of the outer ring cooling pipe and the outer ring cooling pipe to ensure that the cooling rate of the concrete will not exceed 25°C ~ 30°C / day.

[0012] Furthermore, before the inner ring cooling pipe and the outer ring cooling pipe are subjected to external circulation cooling, the water temperature of the water tank is calculated and given by the temperature monitoring system as T 设 At this time, the water temperature sensor in the temperature control water tank measures the water temperature to be T 水 , when T 水 <T 设 When the temperature control water tank enters the internal circulation heating mode, the water in the temperature control water tank is heated to T 水 =T 设 When T 水 >T 设 When the temperature control water tank enters the internal circulation cooling mode, the water in the temperature control water tank is cooled to T 水 =T 设 .

[0013] Furthermore, when the inner circle cooling pipe and the outer circle cooling pipe are performing external circulation cooling, when the difference between the water inlet temperature and the water outlet temperature exceeds the set temperature difference value, the concrete cooling temperature needs to be insulated, and the temperature control water tank enters the external circulation heating mode to increase the water temperature in the temperature control water tank.

[0014] The beneficial effects of the present invention are: 1. The multi-mode cooling system for cooling poured concrete of the present invention is provided with S-shaped cooling pipes and external cooling pipes inside the concrete and near the outer surface, respectively. The inside and outer surface of the concrete are cooled respectively by two sets of independently operated cooling systems. The cooling system can timely adjust the water flow rate and water temperature of the cooling water pipe according to the temperature monitoring result, and has a heat preservation function to ensure the cooling rate of the concrete, thereby achieving a small difference in the temperature gradient between the inside and outside, reducing the internal temperature stress, and ensuring the quality of the concrete.

[0015] 2. The multi-mode cooling system for cooling concrete pouring of the present invention has the following advantages: 1) Uniform cooling: The cooling speed should be as uniform as possible to avoid excessively fast or slow cooling speeds that may cause excessive temperature gradients inside the concrete. Excessive temperature gradients may easily cause temperature differences between the surface and inside of the concrete, which may lead to the formation of temperature cracks. 2) Control the cooling rate: Try to control the cooling rate to avoid too fast a temperature drop. Too fast a cooling rate will cause the shrinkage rate inside the concrete to be too large, which may cause surface cracking. It is usually recommended to reduce the concrete temperature by no more than 25°C to 30°C / day. 3) Avoid rapid cooling: Avoid using supercooled water for cooling, especially in hot seasons. Rapid cooling may cause the concrete surface to solidify quickly, forming a "frozen interlayer" and affecting the overall performance of the concrete.

[0016] 4) Keep it moist: It is important to keep the concrete surface moist during the cooling process. Covering the concrete surface with moist sacks, straw mats, etc. to keep the concrete surface moist is conducive to uniform temperature reduction and slows down the hydration reaction rate of the concrete. 5) Real-time temperature monitoring: During the concrete pouring and cooling process, the temperature of the concrete needs to be monitored in real time; through temperature monitoring data, the cooling measures can be adjusted in time to ensure that the concrete temperature is within a safe range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the concrete inner pipe in the existing cooling system for cooling the poured concrete; Figure 2 This is a working flow diagram of the multi-mode cooling system for cooling concrete pouring according to the present invention; Figure 3 A schematic diagram of the piping structure of the multi-mode cooling system for cooling concrete pouring according to the present invention; Figure 4 It is a schematic diagram of the structure of the pipeline inside the concrete in the multi-mode cooling system for cooling the poured concrete of the present invention; Figure 5 It is a pipeline structure diagram of the internal circulation heating mode in the multi-mode cooling system for cooling concrete pouring of the present invention; Figure 6 It is a piping structure diagram of the internal circulation cooling mode in the multi-mode cooling system for cooling concrete pouring of the present invention; Figure 7 It is a piping structure diagram of the internal and external circulation heating mode of the multi-mode cooling system for cooling concrete pouring of the present invention; Figure 8 A piping structure diagram of an external circulation cooling mode in a multi-mode cooling system for cooling concrete pouring according to the present invention; Fig. 9A steady-state temperature field distribution diagram of a concrete block in a cooling mode of an existing cooling system for cooling concrete pouring; Fig.10 This is a steady-state temperature field distribution diagram of a concrete block in a cooling mode of the multi-mode cooling system for cooling concrete casting according to the present invention.

[0018] Figure markings: 1-concrete; 2-inside of concrete; 3-inner circle cooling pipe; 4-outer circle cooling pipe; 5-temperature-controlled water tank; 6-water pump; 7-pressure valve; 8-flow valve; 9-pressure gauge; 10-water inlet temperature sensor; 11-water tank temperature sensor; 12-electric heater; 13-manual ball valve; 14-water supply tank; 15-water supply pump; 16-filter; 17-cooler; 18-water outlet temperature sensor; 19-internal circulation switching electric ball valve; 20-cooling switching electric ball valve; 21-return water filter; 22-return water electric ball valve; 23-inlet water electric ball valve. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] like Figure 2-4 The figure shows a schematic diagram of the structure of the multi-mode cooling system for cooling concrete pouring according to the present invention; the multi-mode cooling system for cooling concrete pouring according to the present invention comprises a pair of temperature-controlled water tanks 5, an outer ring cooling pipe circulation pipeline and an inner ring cooling pipe circulation pipeline respectively connected to the pair of temperature-controlled water tanks 5, and an outer ring cooling pipe 4 and an inner ring cooling pipe 3 arranged in the concrete 1 and respectively connected to the outer ring cooling pipe circulation pipeline and the inner ring cooling pipe circulation pipeline; The outer ring cooling pipe 4 is arranged in the concrete near the surface for cooling the concrete 1 near the outside, and the inner ring cooling pipe is arranged in the concrete 1 for cooling the concrete interior 2; The temperature-controlled water tank 5 includes a water tank body, a water level detector arranged in the water tank body, a water tank temperature sensor 11 and an electric heating meter 12; The outer ring cooling pipe circulation pipeline includes a water supply main pipeline connected between the temperature control water tank 5 and the outer ring cooling pipe 4 and a water return main pipeline connected between the outer ring cooling pipe 4 and the temperature control water tank 5; The water supply main line is provided with a water pump 6, a flow valve 8, a pressure gauge 9, a water inlet temperature sensor 10, a water inlet electric ball valve 23 and a manual ball valve 13 in sequence; The return water main line is provided with a manual ball valve 1, a return water electric ball valve 22, a water outlet temperature sensor 18, a return water filter 21 and a return water electric ball valve 1 in sequence; The main water supply line is connected to a pressure line connected to a temperature-controlled water tank 5 at the outlet of the water pump 6, and a pressure valve 7 is provided on the pressure line; An internal circulation pipeline for internal circulation is connected between the water supply main pipeline and the return water main pipeline. One end of the internal circulation pipeline is connected to the water inlet end of the water inlet electric ball valve 23, and the other end is connected to the water outlet end of the return water electric ball valve 22. The internal circulation pipeline is provided with an internal circulation switching electric ball valve 19 for closing / opening the internal circulation pipeline; A cooling pipeline connected to the temperature control water tank is connected between the return water filter and the return water electric ball valve 1 on the return water main line, and a cooling switching electric ball valve 20 and a cooler 17 are sequentially arranged on the cooling pipeline; The inner circle cooling pipe circulation pipeline includes a water supply main line I connected between the temperature control water tank and the inner circle cooling pipe and a water return main line I connected between the inner circle cooling pipe and the temperature control water tank; The main water supply line I is provided with a water pump I, a flow valve I, a pressure gauge I, a water inlet temperature sensor I, a water inlet electric ball valve I and a manual ball valve II; The return water main line I is provided with a manual ball valve III, a return water electric ball valve II, an outlet water temperature sensor I, a return water filter I and a return water electric ball valve III in sequence; The main water supply line I is located at the outlet of the water pump I and is connected to a pressure line I connected to the temperature control water tank, and a pressure valve I is provided on the pressure line I; An internal circulation pipeline I for internal circulation is connected between the water supply main pipeline I and the return water main pipeline I. One end of the internal circulation pipeline I is connected to the water inlet end of the water inlet electric ball valve I, and the other end is connected to the water outlet end of the return water electric ball valve II. The internal circulation pipeline I is provided with an internal circulation switching electric ball valve I for closing / opening the internal circulation pipeline I; A cooling pipeline I connected to a temperature-controlled water tank is connected on the return water main pipeline I between the return water filter I and the return water electric ball valve III, and a cooling switching electric ball valve I and a cooler I are sequentially arranged on the cooling pipeline I.

[0021] The multi-mode cooling system in this embodiment consists of four parts: a temperature control system, a piping system, a cold water system, and a control system.

[0022] The temperature control water tank in the temperature control system includes a water tank body, a water level detector, a temperature sensor, and a heating rod; the heating rod is responsible for heating the water inside the water tank so that the difference between the cooling water temperature and the temperature inside the concrete is within the specified range; the temperature sensor monitors the water tank temperature in real time; the water level detector detects the water level inside the water tank, controls the operation of the water tank water supply pump WB1, and ensures that the water level is not lower than the heating rod to ensure the safe operation of the equipment; The piping system includes circulating pipes, water pumps, flow meters, pressure gauges, safety valves, electric valves, manual valves, temperature sensors, filters, etc. The water pumps include water supply pumps and circulating water pumps, which are responsible for the supply and circulation of cooling water; flow meters, pressure gauges, and temperature sensors are responsible for monitoring the internal conditions of the pipelines and feeding back corresponding data to guide the cooling action; safety valves ensure pipeline safety; filters ensure that the water entering the circulating pipelines and cold water systems does not contain large particles of impurities, ensuring the cleanliness of the pipelines and avoiding pipeline blockages; electric valves and manual valves are used for pipeline switching to achieve multi-mode operation of the system; The chilled water system is responsible for cooling the cooling water flowing out of the concrete; The control system is responsible for the coordinated operation of each module of the multi-mode cooling system, controlling electrical equipment such as water pumps to achieve heating and cooling functions; real-time monitoring of the temperature of concrete, water outlet and water inlet pipes, and recording, management and transmission of data; and supports remote monitoring functions.

[0023] In this embodiment, the peripheral pipelines and components of the inner and outer ring temperature-controlled water tanks and the inner ring temperature-controlled water tank are exactly the same. The outer ring temperature-controlled water tank is responsible for cooling the area covered by the outer ring pipe of the poured concrete, and the inner ring temperature-controlled water tank is responsible for cooling the area covered by the inner ring pipe of the poured concrete; the outer ring temperature-controlled water tank and the inner ring temperature-controlled water tank control the respective temperatures of the two water tanks according to the measurement results of the temperature sensor inside the concrete.

[0024] like Figure 5 Shown is the multi-mode cooling system in recirculation heating mode Among them, the electric valves MQ2, MQ3, and MQ5 are closed, and MQ1 and MQ4 are opened. This mode is used to heat the circulating water in the pipeline to the specified cooling water temperature in advance; it is suitable for the initial cooling of large-volume concrete and the situation where the internal temperature is high; when the water pump is working, the cooling water enters the flow valve, pressure valve, internal circulation pipeline, internal circulation switching electric ball valve, return water main pipeline, return water filter and return water electric ball valve I along the water supply main line, and flows back to the temperature control water tank.

[0025] like Figure 6 Shown is the multi-mode cooling system internal circulation cooling mode Among them, the electric valves MQ2, MQ3, and MQ4 are closed, and MQ1 and MQ5 are opened. This mode is used to cool the circulating water in the pipeline to the specified cooling water temperature in advance; it is suitable for the situation where the internal temperature drops to a certain extent after the initial cooling for a period of time, and the cooling water in the water tank needs to be cooled when the water pump is working. Under the operation of the water pump, the cooling water enters the flow valve, pressure valve, internal circulation pipeline, internal circulation switching electric ball valve, return water main pipeline, return water filter, return water electric ball valve II and cooler along the water supply main line, and flows back to the temperature control water tank.

[0026] like Figure 7Shown is the multi-mode cooling system external circulation heating mode Among them, the electric valves MQ1 and MQ5 are closed, and MQ2, MQ3, and MQ5 are opened. This mode is used when the temperature of cooling water is significantly lower than the temperature inside the concrete (exceeding the specified temperature difference); it is used when the concrete needs to be kept warm at a specified temperature; when the water pump is working, the cooling water enters the flow valve, pressure valve, water inlet electric ball valve, manual ball valve, outer ring cooling pipe, return water main line, return water filter and return water electric ball valve I along the water supply main line, and flows back into the temperature control water tank.

[0027] like Figure 8 Shown is the multi-mode cooling system external circulation cooling mode The electric valves MQ1 and MQ4 are closed, and MQ2, MQ3, and MQ5 are opened. This mode is used when the concrete continues to release heat and circulating water is needed to cool the inside of the concrete. The water pump is working, and the cooling water flows along the water supply main line into the flow valve, pressure valve, water inlet electric ball valve, manual ball valve, outer ring cooling pipe, return water main line, return water filter, return water electric ball valve II and cooler, and flows back to the temperature control water tank.

[0028] In this embodiment, the entire cooling process is a dynamic process. The temperature sensor monitors the change of water temperature in real time. The control system commands the system to heat or cool according to the feedback data of the temperature sensor, so that the temperature of the cooling water is always kept within the specified range. When the internal temperature of the concrete drops to the specified temperature of the day, the system will adjust the water temperature so that the internal temperature of the concrete always maintains this temperature, thereby playing a role in heat preservation.

[0029] like Fig. 9 and Fig.10 They are Figure 1 The steady-state temperature field distribution state diagram of the concrete block under the two cooling modes of the existing cooling system and the dual cooling system of the present invention shows that Fig.10 The temperature gradient on the outer boundary of the concrete is relatively Fig. 9 The surface is smooth and stable, the temperature distribution is more uniform, the cooling effect is better, and the overall performance of the concrete is stronger.

[0030] In a preferred embodiment, at least two cooling layers are arranged in the concrete 1, and an outer ring cooling pipe and an inner ring cooling pipe are arranged in each cooling layer accordingly. A water supply branch pipe connected to each layer of outer ring cooling pipe is arranged at the outlet of the water inlet electric ball valve on the water supply main line, and a plurality of manual ball valves are arranged and are correspondingly arranged on the water supply branch pipe. A return water branch pipe connected to each layer of outer ring cooling pipe is arranged at the inlet of the return water electric ball valve on the return water main line, and a plurality of manual ball valves I are arranged and are correspondingly arranged on the water supply branch pipe. A water supply branch pipe I connected to each layer of inner ring cooling pipe is arranged at the outlet of the water inlet electric ball valve I on the water supply main line I, a plurality of manual ball valves II are arranged and are correspondingly arranged on the water supply branch pipe I, a return water branch pipe I connected to each layer of inner ring cooling pipe is arranged at the inlet of the return water electric ball valve I on the return water main line I, and a plurality of manual ball valves III are arranged and are correspondingly arranged on the water supply branch pipe I.

[0031] In a preferred embodiment, the inner ring cooling pipe 3 is configured as an S-shaped cooling pipe, and the outer ring cooling pipe is configured as a C-shaped cooling pipe.

[0032] In a preferred embodiment, the cooling water temperature at the water inlet of the inner ring cooling pipe 3 is lower than the cooling water temperature at the water inlet of the outer ring cooling pipe. The outer ring cooling pipe assists in cooling the inside of the concrete, and the outer ring cooling pipe is responsible for cooling near the surface of the concrete. Since the heat dissipation inside the concrete is slower than that of the outer layer, during cooling, the cooling water temperature at the IN1 port should be lower than the cooling water temperature at the IN2 port, thereby reducing the impact of the faster heat dissipation of the outer layer on the quality of the concrete.

[0033] In a preferred embodiment, the cooling water temperature at the water outlet of the inner ring cooling pipe 3 is higher than the cooling water temperature at the water outlet of the outer ring cooling pipe.

[0034] The preferred embodiment further includes a water replenishment tank 4 for replenishing water to the temperature-controlled water tank 5. The water replenishment tank is connected to a water replenishment pipeline, and a water replenishment pump 15 and a filter II are provided for water replenishment management.

[0035] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A multi-mode cooling system for cooling concrete, characterized in that: It includes a pair of temperature-controlled water tanks, an outer ring cooling pipe circulation pipeline and an inner ring cooling pipe circulation pipeline respectively connected to the pair of temperature-controlled water tanks, and an outer ring cooling pipe and an inner ring cooling pipe respectively arranged in concrete and connected to the outer ring cooling pipe circulation pipeline and the inner ring cooling pipe circulation pipeline; The outer ring cooling pipe is arranged in the concrete near the surface for cooling the concrete near the outside, and the inner ring cooling pipe is arranged in the concrete for cooling the concrete; The temperature-controlled water tanks all include a water tank body, a water level detector arranged in the water tank body, a water tank temperature sensor and an electric heater; The outer ring cooling pipe circulation pipeline includes a water supply main line connected between the temperature control water tank and the outer ring cooling pipe and a water return main line connected between the outer ring cooling pipe and the temperature control water tank; The water supply main line is provided with a water pump, a flow valve, a pressure gauge, a water inlet temperature sensor, a water inlet electric ball valve and a manual ball valve in sequence; The return water main line is provided with a manual ball valve I, a return water electric ball valve, a water outlet temperature sensor, a return water filter and a return water electric ball valve I in sequence; The main water supply line is connected to a pressure line connected to a temperature-controlled water tank at the outlet of the water pump, and a pressure valve is provided on the pressure line; An internal circulation pipeline for internal circulation is connected between the water supply main pipeline and the return water main pipeline, one end of the internal circulation pipeline is connected to the water inlet end of the water inlet electric ball valve, and the other end is connected to the water outlet end of the return water electric ball valve. The internal circulation pipeline is provided with an internal circulation switching electric ball valve for closing / opening the internal circulation pipeline; The return water main line is connected to a cooling line connected to a temperature control water tank between the return water filter and the return water electric ball valve 1, and a cooling switching electric ball valve and a cooler are sequentially arranged on the cooling line; The inner circle cooling pipe circulation pipeline includes a water supply main line I connected between the temperature control water tank I and the inner circle cooling pipe, and a water return main line I connected between the inner circle cooling pipe and the temperature control water tank I; The water supply main line I is provided with a water pump I, a flow valve I, a pressure gauge I, a water inlet temperature sensor I, a water inlet electric ball valve I and a manual ball valve II; The return water main line I is provided with a manual ball valve III, a return water electric ball valve II, a water outlet temperature sensor I, a return water filter I and a return water electric ball valve III in sequence; The main water supply line I is located at the outlet of the water pump I and is connected to a pressure line I connected to a temperature-controlled water tank, and a pressure valve I is provided on the pressure line I; An internal circulation pipeline I for internal circulation is connected between the water supply main pipeline I and the return water main pipeline I. One end of the internal circulation pipeline I is connected to the water inlet end of the water inlet electric ball valve I, and the other end is connected to the water outlet end of the return water electric ball valve II. The internal circulation pipeline I is provided with an internal circulation switching electric ball valve I for closing / opening the internal circulation pipeline I; The return water main line I is connected to a cooling line I connected to a temperature control water tank between the return water filter I and the return water electric ball valve III, and the cooling line I is sequentially provided with a cooling switching electric ball valve I and a cooler I.

2. The multi-mode cooling system for cooling concrete pouring as claimed in claim 1, characterized in that: No less than two cooling layers are arranged in the concrete, and an outer ring cooling pipe and an inner ring cooling pipe are arranged in each cooling layer accordingly. A water supply branch pipe connected with each layer of outer ring cooling pipe in one-to-one correspondence is arranged on the water supply main pipe at the outlet of the water inlet electric ball valve, a plurality of manual ball valves are arranged and are correspondingly arranged on the water supply branch pipe, a return water branch pipe connected with each layer of outer ring cooling pipe in one-to-one correspondence is arranged on the return water main pipe at the inlet of the return water electric ball valve, a plurality of manual ball valves I are arranged and are correspondingly arranged on the water supply branch pipe, a water supply branch pipe I connected with each layer of inner ring cooling pipe in one-to-one correspondence is arranged on the water supply main pipe I at the outlet of the water inlet electric ball valve I, a plurality of manual ball valves II are arranged and are correspondingly arranged on the water supply branch pipe I, a return water branch pipe I connected with each layer of inner ring cooling pipe in one-to-one correspondence is arranged on the return water main pipe I at the inlet of the return water electric ball valve I, and a plurality of manual ball valves III are arranged and are correspondingly arranged on the water supply branch pipe I.

3. The multi-mode cooling system for cooling concrete pouring according to claim 1 or 2, characterized in that: The inner ring cooling pipe is configured as an S-shaped cooling pipe, and the outer ring cooling pipe is configured as a C-shaped cooling pipe.

4. The multi-mode cooling system for cooling concrete pouring as claimed in claim 1, characterized in that: The cooling water temperature at the water inlet of the inner ring cooling pipe is lower than the cooling water temperature at the water inlet of the outer ring cooling pipe.

5. The multi-mode cooling system for cooling concrete pouring as claimed in claim 4, characterized in that: The cooling water temperature at the water outlet of the inner ring cooling pipe is higher than the cooling water temperature at the water outlet of the outer ring cooling pipe.

6. The multi-mode cooling system for cooling concrete pouring according to claim 1, characterized in that: It also includes a water replenishment tank for replenishing water to the temperature-controlled water tank. The water replenishment tank is connected to a water replenishment pipeline, and the water replenishment management is provided with a water replenishment pump and a filter II.

7. A temperature control method using the multi-mode cooling system for cooling concrete pouring according to claims 1-6, characterized in that: The control process is as follows: 1) Real-time monitoring of the temperature of each monitoring point of concrete: The temperature at different locations inside and outside the large volume concrete is monitored by the temperature monitoring system installed inside and outside the concrete, and the temperature data is transmitted to the temperature monitoring center. The temperature reduction and temperature control method is adjusted based on the temperature monitoring data; 2) Cooling pipe layout: Two groups of cooling pipes are arranged in each layer of concrete, one group is the inner ring cooling pipe for cooling the inside of the concrete, and the other group is the outer ring cooling pipe for cooling the position close to the concrete surface. The inner ring cooling pipe and the outer ring cooling pipe are temperature-controlled and water-supplied by a pair of temperature-controlled water tanks. When cooling is performed at the same time, the cooling water temperature at the water inlet of the inner ring cooling pipe must be lower than the cooling water temperature at the water inlet of the outer ring cooling pipe; 3) Control the cooling speed: According to the temperature monitoring results, adjust the water flow rate and water temperature of the outer ring cooling pipe and the outer ring cooling pipe to ensure that the cooling rate of the concrete does not exceed 25°C ~ 30°C / day.

8. The temperature control method of the multi-mode cooling system for cooling concrete pouring as claimed in claim 7, characterized in that: Before the inner and outer cooling pipes are cooled by external circulation, the water temperature of the water tank is calculated and given by the temperature monitoring system as T. 设 At this time, the water temperature sensor in the temperature control water tank measures the water temperature to be T 水 , when T 水 <T 设 When the temperature control water tank enters the internal circulation heating mode, the water in the temperature control water tank is heated to T 水 =T 设 When T 水 >T 设 When the temperature control water tank enters the internal circulation cooling mode, the water in the temperature control water tank is cooled to T 水 =T 设 .

9. The temperature control method of the multi-mode cooling system for pouring concrete as claimed in claim 7, characterized in that: When the inner circle cooling pipe and the outer circle cooling pipe are performing external circulation cooling, when the difference between the water inlet temperature and the water outlet temperature exceeds the set temperature difference value, the concrete cooling temperature needs to be kept warm, and the temperature control water tank enters the external circulation heating mode to increase the water temperature in the temperature control water tank.

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