Water control device and method for pouring large volume concrete

Abstract

A water control device and method for pouring large-volume concrete, including a cold water pump, a hot water pump and a mixing water pump, wherein the cold water pump water inlet is connected to the cold water inlet through a main cold water inlet pipe, the mixing water pump water inlet is connected to the cold water inlet through a branch cold water inlet pipe on one side, and connected to the hot water inlet through a branch hot water inlet pipe on the other side, and the hot water pump water inlet is connected to the hot water inlet through the main hot water inlet pipe; the hot water pump water outlet is connected to the hot water outlet through a hot water outlet pipe, the mixing water pump water outlet is connected to the hot water outlet through a second mixing water outlet pipe branch on one side, and connected to the cold water outlet through a first mixing water outlet pipe branch on the other side, and the cold water pump water outlet is connected to the cold water outlet through a cold water outlet pipe. The advantages are that water flows with different flow rates and different temperatures can be provided at present, which is conducive to controlling the temperature difference of various areas of large-volume concrete in a targeted manner; the intelligent degree is high, and the control center can automatically adjust the flow rate and temperature according to the monitoring situation to obtain suitable cooling water.

Description

Technical Field

[0001] The invention relates to the technical field of concrete temperature control, and in particular to a water control device and method for pouring large-volume concrete. Background Art

[0002] Temperature and crack control of large-volume concrete is one of the common problems in the field of civil engineering. During the construction of large-volume concrete structures, the hydration reaction of cement will generate a large amount of hydration heat, which will increase the temperature inside the concrete. When the temperature rise reaches its peak, the temperature drops. During the heating-cooling process, an uneven temperature field will be generated inside the concrete. The external cold concrete is constrained by the expansion and contraction of the internal hot concrete, thus generating temperature stress. When the stress exceeds the ultimate tensile strength of the concrete, cracks will appear in the concrete, resulting in a decrease in the bearing capacity, waterproof performance and durability of the large-volume concrete, affecting the safety of the structure.

[0003] In order to solve the problem of temperature cracks in concrete, the most commonly used temperature control method is to bury water pipes inside the large-volume concrete structure to be poured, and cool it down by delivering cooling water to the water pipes, thereby reducing the temperature difference between the inside and outside of the concrete and the temperature difference between layers. This type of device is usually equipped with a water supply device and a water distribution device. The water supply device supplies water to the water distribution device, and then the water distribution device divides the cooling water into multiple pipelines to deliver large-volume concrete. The utility model patent with application number 202020725939.5 discloses a continuous diversion water control system for high-altitude large-volume concrete pouring, which consists of a water inlet system, a water distribution system and a cooling system. The diversion device is used to make the number of water outlets greater than the number of water pumps, thereby reducing the use of water pumps and saving costs. However, this solution has shortcomings: the water temperature cannot be dynamically adjusted, and the cooling rate is not easy to accurately control. Summary of the invention

[0004] The purpose of the present invention is to provide a water control device and method for pouring large-volume concrete, which can dynamically adjust the flow rate of cold and hot water supply according to the internal temperature of large-volume concrete, so that the cooling water temperature is in an appropriate state, which is conducive to accurately controlling the cooling rate and avoiding the problem of insufficient or too fast cooling rate.

[0005] The technical solution disclosed in the present invention is:

[0006] A water control device for pouring large-volume concrete comprises a cold water tank, a hot water tank, a pump unit, a control center and a water distribution device, wherein the pump unit comprises a cold water pump, a hot water pump and a mixing water pump, wherein the water inlet end of the cold water pump is connected to a cold water inlet through a main cold water inlet pipe, the water inlet end of the mixing water pump is connected to the cold water inlet through a branch cold water inlet pipe in one way and to the hot water inlet through a branch hot water inlet pipe in another way, and the water inlet end of the hot water pump is connected to the hot water inlet through the main hot water inlet pipe; the cold water inlet is connected to the cold water tank, and the hot water inlet is connected to the hot water tank; the water outlet end of the hot water pump is connected to the hot water outlet through a hot water outlet pipe, the water outlet end of the mixing water pump is connected to the hot water outlet through a second mixing water outlet pipe branch in one way and to the cold water outlet through a first mixing water outlet pipe branch in another way, and the water outlet end of the cold water pump is connected to the cold water outlet through a cold water outlet pipe; and the control center is used for parameter input and command issuance.

[0007] As a preferred solution, a mixing water inlet pipe is installed at the water inlet end of the mixing water pump, and the mixing water inlet pipe is connected to the branch cold water inlet pipe and the branch hot water inlet pipe through a three-way joint.

[0008] As a preferred solution, a mixing water outlet pipe is installed at the water outlet end of the mixing water pump, and the mixing water outlet pipe is connected to the second mixing water outlet pipe branch and the first mixing water outlet pipe branch through a three-way joint.

[0009] As a preferred solution, proportional servo valves are respectively installed at the water inlet and outlet of the cold water pump, the hot water pump and the mixing water pump, and the opening and closing of each pipeline and the water flow rate are controlled by the control center.

[0010] As a preferred solution, a first temperature sensor and a cold water outlet flow meter are installed at the cold water outlet, the first temperature sensor measures the water temperature of the cold water outlet in real time and transmits the temperature information to the control center, and the cold water outlet flow meter measures the cold water outlet flow in real time and transmits it to the control center; a second temperature sensor and a hot water outlet flow meter are installed at the hot water outlet, the second temperature sensor measures the water temperature of the hot water outlet in real time and transmits the temperature information to the control center, and the hot water outlet flow meter measures the hot water outlet flow in real time and transmits it to the control center.

[0011] As a preferred solution, a third temperature sensor is installed in the mixed water outlet pipe, and the third temperature sensor measures the water temperature of the mixed water outlet pipe in real time and transmits the temperature information to the control center.

[0012] As a preferred solution, the cold water tank is provided with a first water level sensor and the hot water tank is provided with a second water level sensor for monitoring the water volume; the cold water tank is provided with a fourth temperature sensor and the hot water tank is provided with a fifth temperature sensor for monitoring the water temperature, providing a basis for the temperature control strategy of the control center.

[0013] The water distribution device is provided with a hot water cylinder connected to the hot water outlet, and a cold water cylinder connected to the cold water outlet; the hot water cylinder is provided with a plurality of hot water distribution pipes, each of which is provided with a proportional servo valve; the cold water cylinder is provided with a plurality of cold water distribution pipes, each of which is provided with a proportional servo valve; the hot water distribution pipes and the cold water distribution pipes are the same in number and correspond one to one, and each pair merges into a water distribution outlet; water distribution flow meters are provided at the water distribution outlets.

[0014] A control method for a water control device used for pouring large-volume concrete, comprising the steps of:

[0015] (1) providing cold water: setting the cold water flow value at the control center, starting the cold water pump, and supplying water to the water distribution device. The water distribution device distributes water according to the number of water streams required for temperature control of large-volume concrete and then supplies water to the large-volume concrete. The cold water outlet flow meter measures the cold water outlet flow in real time and transmits it to the control center. The control center compares the outlet flow with the set cold water flow value, and flexibly controls the opening of the proportional servo valve on the main cold water inlet pipe to adjust the flow according to the comparison result. If the flow is insufficient when the cold water pump is turned on, the mixing water pump is turned on at the same time, and the proportional servo valve on the branch cold water inlet pipe is opened, and the proportional servo valve on the branch hot water inlet pipe is closed, and cold water is delivered at the same time.

[0016] (2) Steps for providing hot water: When only hot water is needed, a hot water flow value is set in the control center, and the hot water pump is turned on to supply water to the water distribution device. The water distribution device distributes water according to the number of water streams required for temperature control of large-volume concrete and then supplies water to the large-volume concrete. The hot water outlet flow meter measures the hot water outlet flow in real time and transmits it to the control center. The control center compares the outlet flow with the set hot water flow value, and flexibly controls the opening of the proportional servo valve on the main hot water inlet pipe to adjust the flow according to the comparison result. If the flow rate is insufficient when the hot water pump is turned on alone, the mixing water pump is turned on at the same time, and the proportional servo valve on the branch cold water inlet pipe is closed, and the proportional servo valve on the branch hot water inlet pipe is opened to deliver hot water at the same time.

[0017] (3) The steps of delivering cold and hot water simultaneously: the hot water flow value and the cold water flow value are set in the control center, and the hot water pump and the cold water pump are turned on at the same time to supply water to the water distribution device. The water distribution device distributes water according to the number of water streams required for temperature control of large-volume concrete and supplies water to the large-volume concrete. The cold water outlet flow meter measures the cold water outlet flow in real time and transmits it to the control center. The hot water outlet flow meter measures the hot water outlet flow in real time and transmits it to the control center. The control center compares the cold and hot water outlet flows with the corresponding set values ​​and flexibly controls the opening of the proportional servo valves on the main cold water inlet pipe and the main hot water inlet pipe to adjust the flow. If only the cold water pump and the hot water pump are turned on, and the cold water or hot water flow is still insufficient, the mixing water pump is turned on at the same time. When the cold water is insufficient, the proportional servo valve on the branch hot water inlet pipe is closed, and the proportional servo valve on the branch cold water inlet pipe is opened. When the hot water is insufficient, the proportional servo valve on the branch cold water inlet pipe is closed from time to time, and the proportional servo valve on the branch hot water inlet pipe is opened.

[0018] (4) Adjustment steps for mixing cold and hot water into a water flow of one temperature: When it is necessary to mix cold and hot water into a water flow of one temperature, the control center sets the mixed water temperature control range value and the mixed water flow value, starts the mixing water pump, and simultaneously extracts cold water and hot water, which are then mixed and delivered to the water distribution device; the third temperature sensor installed in the mixing water outlet pipe measures the mixed water temperature in real time and feeds it back to the control center, which compares the mixed water temperature with the set water temperature control range and controls the proportional servo valves on the branch cold water inlet pipe and the branch hot water inlet pipe to change the temperature of the cold and hot water. flow rate; when the mixed water temperature is greater than the set water temperature control range, increase the opening of the proportional servo valve on the branch cold water inlet pipe to increase the cold water inlet flow rate, and reduce the opening of the proportional servo valve on the branch hot water inlet pipe to reduce the hot water inlet flow rate, so as to obtain a suitable water temperature; when the mixed water temperature is less than the set water temperature control range, reduce the opening of the proportional servo valve on the branch cold water inlet pipe to reduce the cold water inlet flow rate, and increase the opening of the proportional servo valve on the branch hot water inlet pipe to increase the hot water inlet flow rate, so as to obtain a suitable water temperature until the requirements are met;

[0019] (5) Delivery of cold and hot water at the same time, and mixed temperature adjustment step: When it is necessary to deliver cold and hot water at the same time and to mix and adjust the temperature, the control center sets the control range value of the mixed cold water outlet temperature and the hot water outlet temperature, as well as the cold water outlet flow value and the hot water outlet flow value, and starts the cold water pump, the hot water pump and the mixing water pump at the same time; the first temperature sensor measures the water temperature of the cold water outlet in real time and transmits the temperature information to the control center; the second temperature sensor measures the water temperature of the hot water outlet in real time and transmits the temperature information to the control center; the control center compares the real-time temperature with the corresponding set value, and adopts the following control strategy according to the comparison result:

[0020] 1) When the water temperature at the cold water outlet is high, the opening of the proportional servo valve on the first mixed water outlet pipe branch is reduced to reduce the mixed water flow rate, and the opening of the proportional servo valve on the cold water outlet pipe is increased to increase the cold water flow rate, so as to reduce the outlet water temperature until the temperature reaches the requirement and the total outlet water flow rate remains unchanged; conversely, when the water temperature at the cold water outlet is low, the opening of the proportional servo valve on the first mixed water outlet pipe branch is increased to increase its flow rate, and the opening of the proportional servo valve on the cold water outlet pipe is reduced to reduce its flow rate, so as to increase the outlet water temperature until the temperature reaches the requirement and the total outlet water flow rate remains unchanged;

[0021] 2) When the water temperature at the hot water outlet is too high, increase the opening of the proportional servo valve on the second mixing water outlet pipe branch to increase the mixed water flow rate, and reduce the opening of the proportional servo valve on the hot water outlet pipe to reduce the hot water flow rate, so as to lower the outlet water temperature, and the total outlet water flow rate remains unchanged; conversely, when the water temperature at the hot water outlet is too low, reduce the opening of the proportional servo valve on the second mixing water outlet pipe branch to reduce the mixed water flow rate, and increase the opening of the proportional servo valve on the hot water outlet pipe to increase the hot water flow rate, so as to increase the outlet water temperature, and the total outlet water flow rate remains unchanged.

[0022] (6) Water distribution steps: According to the actual needs of temperature control of large-volume concrete, the number of water distribution and the flow rate of each water distribution are set in the control center. The water distribution device distributes water to the large-volume concrete after the water distribution. When hot water needs to be delivered, the proportional servo valve of the hot water distribution pipe is opened and the proportional servo valve of the cold water distribution pipe is closed; when cold water needs to be delivered, the proportional servo valve of the hot water distribution pipe is closed and the proportional servo valve of the cold water distribution pipe is opened. The flow meter on the water distribution pipe measures the flow in real time and feeds back to the control center. The control center flexibly controls the opening of the proportional servo valve on the water distribution pipe to adjust the flow according to the comparison result.

[0023] The beneficial effects of the present invention are:

[0024] 1. During the construction of large-volume concrete structures, the temperatures of the concrete layers poured successively are different, and the required cooling rates are also different, so the required water temperatures and flow rates are also different. The technology of the present invention can currently provide water flows with different flow rates and temperatures, which is conducive to targeted control of the temperature difference in various areas of large-volume concrete.

[0025] 2. With high intelligence, the control center can automatically adjust the flow and temperature according to the monitoring situation to obtain suitable cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a general layout diagram of a water control device for pouring large-volume concrete.

[0027] Figure 2 It is a schematic diagram of the structure of the pump unit of the present invention.

[0028] Figure 3 for Figure 2 Left view of .

[0029] Figure 4 for Figure 2 Top view.

[0030] Figure 5 for Figure 2 Rear view of.

[0031] Figure 6 This is the front view of the water distribution device.

[0032] Figure 7 This is the top view of the water distribution device.

[0033] Figure 8 This is the layout diagram of the water distribution pipe and proportional servo valve of the water distribution device.

[0034] The attached figure parts list is:

[0035] 1.1-cold water pump, 1.2-mixing water pump, 1.3-hot water pump, 2.1-main cold water inlet pipe, 2.2-branch cold water inlet pipe, 2.3-branch hot water inlet pipe, 2.4-main hot water inlet pipe, 2.5-cold water inlet, 2.6-hot water inlet, 2.7-mixing water inlet pipe, 3.1-cold water outlet pipe, 3.2-first mixed water outlet pipe branch, 3.3-second mixed water outlet pipe branch, 3.4-hot water outlet pipe, 3.5-cold water outlet, 3.6-hot water outlet, 3.7-mixing water outlet pipe, 4.1-first temperature sensor, 4.2-second temperature sensor, 4.3-third temperature sensor, 4.4-cold outlet Water flow meter, 4.5-hot water outlet flow meter, 5-proportional servo valve, 6-cold water tank, 6.1-fourth temperature sensor, 6.2-first water level sensor, 7-hot water tank, 7.1-fifth temperature sensor, 7.2-second water level sensor, 8-pump unit, 9-control center, 10-water distribution device, 10.1-hot water cylinder, 10.2-cold water cylinder, 10.3-hot water cylinder inlet, 10.4-cold water cylinder inlet, 10.5-hot water distribution pipe, 10.6-cold water distribution pipe, 10.7-water distribution outlet, 10.8-water distribution flow meter, 11-mass concrete, 12-water distribution proportional servo valve. DETAILED DESCRIPTION

[0036] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0037] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The water control device for pouring large-volume concrete of the present invention comprises a cold water tank 6, a hot water tank 7, a pump unit 8, a control center 9, and a water distribution device 10. The pump unit 8 comprises a cold water pump 1.1, a hot water pump 1.3, and a mixing water pump 1.2. The water inlet end of the cold water pump 1.1 is connected to a cold water inlet 2.5 through a main cold water inlet pipe 2.1. The water inlet end of the mixing water pump 1.2 is connected to the cold water inlet 2.5 through a branch cold water inlet pipe 2.2 in one way and to a hot water inlet 2.6 through a branch hot water inlet pipe 2.3 in the other way. The water inlet end of the hot water pump 1.3 is connected to the hot water inlet 2.6 through a main hot water inlet pipe 2.4. The water inlet 2.5 is connected to the cold water tank 6, and the hot water inlet 2.6 is connected to the hot water tank 7; the water outlet of the hot water pump 1.3 is connected to the hot water outlet 3.6 through the hot water outlet pipe 3.4, the water outlet of the mixing water pump 1.2 is connected to the hot water outlet 3.6 through the second mixing water outlet pipe branch 3.3, and is connected to the cold water outlet 3.5 through the first mixing water outlet pipe branch 3.2; the water outlet of the cold water pump 1.1 is connected to the cold water outlet 3.5 through the cold water outlet pipe 3.1; the control center 9 is used for parameter input and command issuance; the water pump is used to transport hot water, cold water and hot and cold mixed water; the water inlet pipeline and the water outlet pipeline are channels for water transportation.

[0038] One end of the hot water inlet pipe is connected to the hot water tank 7, and the other end is divided into two paths at the hot water inlet 2.6. The main hot water inlet pipe 2.4 is connected to the hot water pump 1.3, and the branch hot water inlet pipe 2.3 and the branch cold water pipe 2.2 are combined into a mixing water inlet pipe 2.7 and then connected to the mixing water pump 1.2.

[0039] The water inlet pipe is the outlet pipe after passing through the water pump. The mixed water outlet pipe is divided into two parts again. The first mixed water outlet pipe branch 3.2 merges with the cold water outlet pipe 3.1 to form a cold water distributor connected to the water distributor, and the second mixed water outlet pipe branch 3.3 merges with the hot water outlet pipe to form a hot water distributor connected to the water distributor.

[0040] The proportional servo valve 5 is installed on the water inlet pipe and the water outlet pipe, one is installed on each water inlet pipe and one is installed on each water outlet pipe.

[0041] A mixing water inlet pipe 2.7 is installed at the water inlet end of the hot water pump 1.3, and the mixing water inlet pipe 2.7 is connected to the branch cold water inlet pipe 2.2 and the branch hot water inlet pipe 2.3 through a three-way joint; a mixing water outlet pipe 3.7 is installed at the water outlet end of the hot water pump 1.3, and the mixing water outlet pipe 3.7 is connected to the second mixing water outlet pipe branch 3.3 and the first mixing water outlet pipe branch 3.2 through a three-way joint.

[0042] Proportional servo valves 5 are installed at the water inlet and outlet of the cold water pump 1.1, the hot water pump 1.3 and the mixing water pump 1.2 respectively. The proportional servo valves 5 are controlled by the control center 9 to open and close each pipeline and control the water flow.

[0043] A first temperature sensor 4.1 and a cold water outlet flow meter 4.4 are installed at the cold water outlet 3.5. The first temperature sensor 4.1 measures the water temperature of the cold water outlet 3.5 in real time and transmits the temperature information to the control center 9. The cold water outlet flow meter 4.4 measures the cold water outlet flow in real time and transmits it to the control center 9. A second temperature sensor 4.2 and a hot water outlet flow meter 4.5 are installed at the hot water outlet 3.6. The second temperature sensor 4.2 measures the water temperature of the hot water outlet 3.6 in real time and transmits the temperature information to the control center 9. The hot water outlet flow meter 4.5 measures the hot water outlet flow in real time and transmits it to the control center 9. The cold water tank 6 is provided with a first water level sensor 6.2 and the hot water tank 7 is provided with a second water level sensor 7.2 for monitoring the water volume. The cold water tank 6 is provided with a fourth temperature sensor 6.1 and the hot water tank 7 is provided with a fifth temperature sensor 7.1 for monitoring the water temperature, providing a basis for the temperature control strategy of the control center 9, and facilitating timely heating or cooling when the water temperature does not meet the requirements.

[0044] Temperature sensors are provided at the mixed water outlet pipe 3.7, the cold water outlet 3.5 and the hot water outlet 3.6 to measure the mixed water temperature, the cold water outlet temperature and the hot water outlet temperature.

[0045] A cold water outlet flow meter 4.4 and a hot water outlet flow meter 4.5 are respectively provided at the cold water outlet 3.5 and the hot water outlet 3.6 to measure the cold water outlet flow rate and the hot water outlet flow rate.

[0046] The water pumps include a cold water pump 1.1 for conveying cold water, a hot water pump 1.3 for conveying hot water, and a mixing water pump 1.2 for conveying hot water, cold water, or a mixture of hot and cold water. The water pumps are variable frequency centrifugal pumps, and multiple pumps can be provided as needed. To simplify the description, in this embodiment, one cold water pump, one hot water pump, and one mixing water pump are provided.

[0047] Please refer to Figure 6 , 7 8. The water distribution device 10 is provided with a hot water cylinder 10.1 connected to the hot water outlet, and a cold water cylinder 10.2 connected to the cold water outlet; the hot water cylinder 10.1 is provided with a plurality of hot water distribution pipes 10.5, each of which is provided with a water distribution ratio servo valve 12; the cold water cylinder 10.2 is provided with a plurality of cold water distribution pipes 10.6, each of which is provided with a water distribution ratio servo valve 12; the hot water distribution pipes 10.5 and the cold water distribution pipes 10.6 are the same in number and correspond one to one, and each pair merges into a water distribution outlet 10.7; and water distribution flow meters 10.8 are provided at the water distribution outlets.

[0048] The present invention provides a control method for a water control device for pouring large-volume concrete, comprising the following steps:

[0049] (1) Step of providing cold water: set the cold water flow value in the control center 9, start the cold water pump 1.1, and supply water to the water distribution device 10. The water distribution device 10 distributes water according to the number of water streams required for temperature control of the large-volume concrete and supplies water to the large-volume concrete 11; the cold water outlet flow meter 4.4 measures the cold water outlet flow in real time and transmits it to the control center 9. The control center 9 compares the outlet flow with the set cold water flow value, and flexibly controls the opening of the proportional servo valve on the main cold water inlet pipe 2.1 to adjust the flow according to the comparison result; if the flow is insufficient when only the cold water pump 1.1 is turned on, the mixing water pump 1.2 is turned on at the same time, and the proportional servo valve on the branch cold water inlet pipe 2.2 is opened, and the proportional servo valve on the branch hot water inlet pipe 2.3 is closed, and cold water is delivered at the same time;

[0050] (2) Step of providing hot water: when only hot water is needed, a hot water flow value is set in the control center 9, and the hot water pump 1.3 is turned on to supply water to the water distribution device 10. The water distribution device 10 distributes water according to the number of water streams required for temperature control of the large-volume concrete and supplies water to the large-volume concrete 11; the hot water outlet flow meter 4.5 measures the hot water outlet flow in real time and transmits it to the control center 9. The control center 9 compares the outlet flow with the set hot water flow value, and flexibly controls the opening of the proportional servo valve on the main hot water inlet pipe 2.4 to adjust the flow according to the comparison result; if the flow is insufficient when only the hot water pump 1.3 is turned on, the mixing water pump 1.2 is turned on at the same time, and the proportional servo valve on the branch cold water inlet pipe 2.2 is closed, and the proportional servo valve on the branch hot water inlet pipe 2.3 is opened to deliver hot water at the same time;

[0051] (3) Step of delivering cold and hot water simultaneously: set the hot water flow rate and the cold water flow rate in the control center 9, start the hot water pump 1.3 and the cold water pump 1.1 at the same time to supply water to the water distribution device 10, the water distribution device 10 distributes water according to the number of water streams required for temperature control of the mass concrete and then supplies water to the mass concrete 11; the cold water outlet flow meter 4.4 measures the cold water outlet flow in real time and transmits it to the control center 9, the hot water outlet flow meter 4.5 measures the hot water outlet flow in real time and transmits it to the control center 9, and the control center compares the cold and hot water outlet flows with the corresponding After comparing the set values, the opening of the proportional servo valves on the main cold water inlet pipe 2.1 and the main hot water inlet pipe 2.4 is flexibly controlled to adjust the flow rate; if only the cold water pump and the hot water pump are turned on, and the cold water or hot water flow is still insufficient, the mixing water pump 1.2 is turned on at the same time, and when the cold water is insufficient, the proportional servo valve on the branch hot water inlet pipe 2.3 is closed, and the proportional servo valve on the branch cold water inlet pipe 2.2 is opened; when the hot water is insufficient, the proportional servo valve on the branch cold water inlet pipe 2.2 is closed from time to time, and the proportional servo valve on the branch hot water inlet pipe 2.3 is opened;

[0052] (4) Adjustment steps for mixing cold and hot water to form a water flow of one temperature: When it is necessary to mix cold and hot water to form a water flow of one temperature, the control center 9 sets the mixed water temperature control range value and the mixed water flow value, starts the mixing water pump 1.2, and simultaneously extracts cold water and hot water, and delivers the mixed water to the water distribution device 10; the third temperature sensor 4.3 installed in the mixing water outlet pipe 3.7 measures the mixed water temperature in real time and feeds it back to the control center 9, and the control center 9 compares the mixed water temperature with the set water temperature control range, and controls the proportional servo valves on the branch cold water inlet pipe 2.2 and the branch hot water inlet pipe 2.3 to change the mixed water temperature. The flow of cold and hot water; when the mixed water temperature is greater than the set water temperature control range, increase the opening of the proportional servo valve on the branch cold water inlet pipe 2.2 to increase the cold water inlet flow, and reduce the opening of the proportional servo valve on the branch hot water inlet pipe 2.3 to reduce the hot water inlet flow, so as to obtain a suitable water temperature; when the mixed water temperature is less than the set water temperature control range, reduce the opening of the proportional servo valve on the branch cold water inlet pipe 2.2 to reduce the cold water inlet flow, and increase the opening of the proportional servo valve on the branch hot water inlet pipe 2.3 to increase the hot water inlet flow, so as to obtain a suitable water temperature until the requirements are met;

[0053] (5) Delivery of cold and hot water at the same time, and mixed temperature adjustment step: When it is necessary to deliver cold and hot water at the same time and to mix and adjust the temperature, the control center 9 sets the control range value of the mixed cold water outlet temperature and the hot water outlet temperature, as well as the cold water outlet flow value and the hot water outlet flow value, and simultaneously starts the cold water pump 1.1, the hot water pump 1.3 and the mixing water pump 1.2; the first temperature sensor 4.1 measures the water temperature of the cold water outlet 3.5 in real time and transmits the temperature information to the control center; the second temperature sensor 4.2 measures the water temperature of the hot water outlet 3.6 in real time and transmits the temperature information to the control center; the control center compares the real-time temperature with the corresponding set value, and adopts the following control strategy according to the comparison result:

[0054] 1) When the water temperature at the cold water outlet 3.5 is too high, the opening of the proportional servo valve on the first mixed water outlet pipe branch 3.2 is reduced to reduce the mixed water flow rate, and at the same time, the opening of the proportional servo valve on the cold water outlet pipe 3.1 is increased to increase the cold water flow rate, so as to reduce the outlet water temperature until the temperature reaches the requirement and the total outlet water flow rate remains unchanged; conversely, when the water temperature at the cold water outlet 3.5 is too low, the opening of the proportional servo valve on the first mixed water outlet pipe branch 3.2 is increased to increase its flow rate, and at the same time, the opening of the proportional servo valve on the cold water outlet pipe 3.1 is reduced to reduce its flow rate, so as to increase the outlet water temperature until the temperature reaches the requirement and the total outlet water flow rate remains unchanged;

[0055] 2) When the water temperature at the hot water outlet 3.6 is too high, the opening of the proportional servo valve on the second mixed water outlet pipe branch 3.3 is increased to increase the mixed water flow rate, and the opening of the proportional servo valve on the hot water outlet pipe 3.4 is reduced to reduce the hot water flow rate, so as to lower the outlet water temperature, and the total outlet water flow rate remains unchanged; conversely, when the water temperature at the hot water outlet 3.6 is too low, the opening of the proportional servo valve on the second mixed water outlet pipe branch 3.3 is reduced to reduce the mixed water flow rate, and the opening of the proportional servo valve on the hot water outlet pipe 3.4 is increased to increase the hot water flow rate, so as to increase the outlet water temperature, and the total outlet water flow rate remains unchanged.

[0056] (6) Water distribution step: According to the actual needs of temperature control of large-volume concrete, the number of water distribution and the flow rate of each water distribution are set in the control center 9, and the water distribution device 10 distributes the water to the large-volume concrete 11 after the water is distributed. When hot water needs to be delivered, the water distribution ratio servo valve 12 of the hot water distribution pipe 10.5 is opened, and the water distribution ratio servo valve 12 of the cold water distribution pipe 10.6 is closed; when cold water needs to be delivered, the water distribution ratio servo valve 12 of the hot water distribution pipe 10.5 is closed, and the water distribution ratio servo valve 12 of the cold water distribution pipe 10.6 is opened. The flow meter 10.8 on the water distribution outlet pipe measures the flow in real time and feeds back to the control center 9. The control center 9 flexibly controls the opening of the water distribution ratio servo valve 12 on the water distribution pipe to adjust the flow according to the comparison result.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A water control device for pouring large-volume concrete, comprising a cold water tank (6), a hot water tank (7), a pump unit (8), a control center (9), and a water distribution device (10), characterized in that: The pump unit (8) comprises a cold water pump (1.1), a hot water pump (1.3) and a mixing water pump (1.2); the water inlet end of the cold water pump (1.1) is connected to a cold water inlet (2.5) via a main cold water inlet pipe (2.1); the water inlet end of the mixing water pump (1.2) is connected to the cold water inlet (2.5) via a branch cold water inlet pipe (2.2) on one side and to a hot water inlet (2.6) via a branch hot water inlet pipe (2.3) on the other side; the water inlet end of the hot water pump (1.3) is connected to the hot water inlet (2.6) via a main hot water inlet pipe (2.4); the cold water inlet (2 .5) is connected to a cold water tank (6), the hot water inlet (2.6) is connected to a hot water tank (7); the water outlet of the hot water pump (1.3) is connected to a hot water outlet (3.6) via a hot water outlet pipe (3.4); the water outlet of the mixing water pump (1.2) is connected to the hot water outlet (3.6) via a second mixing water outlet pipe branch (3.3) and connected to a cold water outlet (3.5) via a first mixing water outlet pipe branch (3.2); the water outlet of the cold water pump (1.1) is connected to the cold water outlet (3.5) via a cold water outlet pipe (3.1); the control center (9) is used to A mixed water inlet pipe (2.7) is installed at the water inlet end of the mixed water pump (1.2), and the mixed water inlet pipe (2.7) is connected to the branch cold water inlet pipe (2.2) and the branch hot water inlet pipe (2.3) through a three-way joint; a mixed water outlet pipe (3.7) is installed at the water outlet end of the mixed water pump (1.2), and the mixed water outlet pipe (3.7) is connected to the second mixed water outlet pipe branch (3.3) and the first mixed water outlet pipe branch (3.2) through a three-way joint; a first temperature sensor (4.1) and a cold water outlet flow meter (4.4) are installed at the cold water outlet (3.5); A temperature sensor (4.1) measures the water temperature of the cold water outlet (3.5) in real time and transmits the temperature information to a control center (9); a cold water outlet flow meter (4.4) measures the cold water outlet flow in real time and transmits the cold water outlet flow to the control center (9); a second temperature sensor (4.2) and a hot water outlet flow meter (4.5) are installed at the hot water outlet (3.6); the second temperature sensor (4.2) measures the water temperature of the hot water outlet (3.6) in real time and transmits the temperature information to the control center (9); and the hot water outlet flow meter (4.5) measures the hot water outlet flow in real time and transmits the hot water outlet flow to the control center (9).

2. The water control device for pouring large-volume concrete according to claim 1, characterized in that: Proportional servo valves (5) are respectively installed at the water inlet and outlet ends of the cold water pump (1.1), the hot water pump (1.2) and the mixing water pump (1.3); the proportional servo valves (5) are controlled by the control center (9) to open and close each pipeline and control the water flow rate.

3. The water control device for pouring large-volume concrete according to claim 1, characterized in that: A third temperature sensor (4.3) is installed on the mixed water outlet pipe (3.7), and the third temperature sensor (4.3) measures the water temperature of the mixed water outlet pipe (3.7) in real time and transmits the temperature information to the control center (9).

4. The water control device for pouring large-volume concrete according to claim 1, characterized in that: The cold water tank (6) is provided with a first water level sensor (6.2) and the hot water tank (7) is provided with a second water level sensor (7.2) for monitoring the water volume; the cold water tank (6) is provided with a fourth temperature sensor (6.1) and the hot water tank (7) is provided with a fifth temperature sensor (7.1) for monitoring the water temperature, thereby providing a basis for the temperature control strategy of the control center (9).

5. The water control device for pouring large-volume concrete according to claim 1, characterized in that: The water distribution device (10) is provided with a hot water cylinder (10.1) connected to the hot water outlet and a cold water cylinder (10.2) connected to the cold water outlet; the hot water cylinder (10.1) is provided with a plurality of hot water distribution pipes (10.5), each of which is provided with a proportional servo valve (12); the cold water cylinder (10.2) is provided with a plurality of cold water distribution pipes (10.6), each of which is provided with a proportional servo valve (12); the hot water distribution pipes (10.5) and the cold water distribution pipes (10.6) are the same in number and correspond one to one, and each pair of them merge into a water distribution outlet (10.7); and a water distribution flow meter (10.8) is provided at each water distribution outlet.

6. A control method for the water control device for pouring large-volume concrete according to claim 1, characterized in that: Includes steps: (1) providing cold water step: setting a cold water flow value at the control center (9), starting the cold water pump (1.1), and supplying water to the water distribution device (10); the water distribution device (10) distributes water according to the number of water streams required for temperature control of the large volume concrete and then supplies water to the large volume concrete (11); the cold water outlet flow meter (4.4) measures the cold water outlet flow in real time and transmits it to the control center (9); the control center (9) compares the outlet flow with the set cold water flow value, and flexibly controls the opening of the proportional servo valve on the main cold water inlet pipe (2.1) to adjust the flow according to the comparison result; if the flow is insufficient when only the cold water pump (1.1) is turned on, the mixing water pump (1.2) is turned on at the same time, and the proportional servo valve on the branch cold water inlet pipe (2.2) is opened, and the proportional servo valve on the branch hot water inlet pipe (2.3) is closed, and cold water is delivered at the same time; (2) hot water supply step: when only hot water is needed, a hot water flow value is set in the control center (9), the hot water pump (1.3) is turned on, and water is supplied to the water distribution device (10). The water distribution device (10) distributes water according to the number of water streams required for temperature control of the large-volume concrete and supplies water to the large-volume concrete (11); the hot water outlet flow meter (4.5) measures the hot water outlet flow in real time and transmits it to the control center (9). The control center (9) compares the outlet flow with the set hot water flow value, and flexibly controls the opening of the proportional servo valve on the main hot water inlet pipe (2.4) to adjust the flow according to the comparison result; if the flow is insufficient when the hot water pump (1.3) is turned on, the mixing water pump (1.2) is turned on at the same time, and the proportional servo valve on the branch cold water inlet pipe (2.2) is closed, and the proportional servo valve on the branch hot water inlet pipe (2.3) is opened to deliver hot water at the same time; (3) The step of simultaneously delivering cold and hot water: the hot water flow rate and the cold water flow rate are set in the control center (9), and the hot water pump (1.3) and the cold water pump (1.1) are simultaneously turned on to supply water to the water distribution device (10). The water distribution device (10) distributes water according to the number of water streams required for temperature control of the large-volume concrete and then supplies water to the large-volume concrete (11); the cold water outlet flow meter (4.4) measures the cold water outlet flow rate in real time and transmits it to the control center (9), and the hot water outlet flow meter (4.5) measures the hot water outlet flow rate in real time and transmits it to the control center (9). The control center calculates the cold and hot water outlet flow rates. After comparison with the corresponding set value, the opening of the proportional servo valve on the main cold water inlet pipe (2.1) and the main hot water inlet pipe (2.4) is flexibly controlled to adjust the flow rate; if only the cold water pump and the hot water pump are turned on, and the cold water or hot water flow is still insufficient, the mixing water pump (1.2) is turned on at the same time, and when the cold water is insufficient, the proportional servo valve on the branch hot water inlet pipe (2.3) is closed, and the proportional servo valve on the branch cold water inlet pipe (2.2) is opened; when the hot water is insufficient, the proportional servo valve on the branch cold water inlet pipe (2.2) is closed from time to time, and the proportional servo valve on the branch hot water inlet pipe (2.3) is opened; (4) Adjustment steps for mixing cold and hot water to form a water flow of one temperature: When it is necessary to mix cold and hot water to form a water flow of one temperature, the control center (9) sets the mixed water temperature control range value and the mixed water flow value, starts the mixing water pump (1.2), and simultaneously extracts cold water and hot water, mixes them and delivers them to the water distribution device (10); the third temperature sensor (4.3) installed on the mixing water outlet pipe (3.7) measures the mixed water temperature in real time and feeds it back to the control center (9); the control center (9) compares the mixed water temperature with the set water temperature control range, and controls the proportional servo on the branch cold water inlet pipe (2.2) and the branch hot water inlet pipe (2.3) The servo valve is used to change the flow of cold and hot water; when the mixed water temperature is greater than the set water temperature control range, the opening of the proportional servo valve on the branch cold water inlet pipe (2.2) is increased to increase the cold water inlet flow, and the opening of the proportional servo valve on the branch hot water inlet pipe (2.3) is reduced to reduce the hot water inlet flow, thereby obtaining a suitable water temperature; when the mixed water temperature is less than the set water temperature control range, the opening of the proportional servo valve on the branch cold water inlet pipe (2.2) is reduced to reduce the cold water inlet flow, and the opening of the proportional servo valve on the branch hot water inlet pipe (2.3) is increased to increase the hot water inlet flow, thereby obtaining a suitable water temperature until the requirement is met; (5) Cold and hot water are delivered simultaneously, and mixed temperature adjustment is performed: when cold and hot water need to be delivered simultaneously, and mixed temperature adjustment is required, the control range values ​​of the mixed cold water outlet temperature and the hot water outlet temperature, as well as the cold water outlet flow value and the hot water outlet flow value are set in the control center (9), and the cold water pump (1.1), the hot water pump (1.3) and the mixing water pump (1.2) are started at the same time; the first temperature sensor (4.1) measures the water temperature of the cold water outlet (3.5) in real time and transmits the temperature information to the control center; the second temperature sensor (4.2) measures the water temperature of the hot water outlet (3.6) in real time and transmits the temperature information to the control center; the control center compares the real-time temperature with the corresponding set value, and adopts the following control strategy according to the comparison result: 1) When the water temperature at the cold water outlet (3.5) is too high, the opening of the proportional servo valve on the first mixed water outlet pipe branch (3.2) is reduced to reduce the mixed water flow rate, and at the same time, the opening of the proportional servo valve on the cold water outlet pipe (3.1) is increased to increase the cold water flow rate, thereby reducing the outlet water temperature until the temperature reaches the requirement and the total outlet water flow rate remains unchanged; On the contrary, when the water temperature at the cold water outlet (3.5) is low, the opening of the proportional servo valve on the first mixed water outlet pipe branch (3.2) is increased to increase its flow rate, and the opening of the proportional servo valve on the cold water outlet pipe (3.1) is reduced to reduce its flow rate, so as to increase the outlet water temperature until the temperature reaches the requirement and the total outlet water flow rate remains unchanged; 2) When the water temperature at the hot water outlet (3.6) is high, the opening of the proportional servo valve on the second mixed water outlet pipe branch (3.3) is increased to increase the mixed water flow rate, and the opening of the proportional servo valve on the hot water outlet pipe (3.4) is reduced to reduce the hot water flow rate, so as to lower the outlet water temperature, and the total outlet water flow rate remains unchanged; conversely, when the water temperature at the hot water outlet (3.6) is low, the opening of the proportional servo valve on the second mixed water outlet pipe branch (3.3) is reduced to reduce the mixed water flow rate, and the opening of the proportional servo valve on the hot water outlet pipe (3.4) is increased to increase the hot water flow rate, so as to increase the outlet water temperature, and the total outlet water flow rate remains unchanged; (6) Water distribution step: according to the actual needs of temperature control of large-volume concrete, the number of water distribution streams and the flow rate of each stream are set in the control center (9), and the water is distributed by the water distribution device (10) to the large-volume concrete (11); when hot water needs to be delivered, the proportional servo valve of the hot water distribution pipe (10.5) is opened, and the proportional servo valve of the cold water distribution pipe (10.6) is closed; when cold water needs to be delivered, the proportional servo valve of the hot water distribution pipe (10.5) is closed, and the proportional servo valve of the cold water distribution pipe (10.6) is opened; the flow meter (10.8) on the water distribution outlet pipe measures the flow rate in real time and feeds back to the control center (9), and the control center (9) flexibly controls the opening of the proportional servo valve on the water distribution pipe to adjust the flow rate according to the comparison result.

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