Mountain area mass concrete pouring temperature monitoring system

Abstract

The invention relates to the technical field of concrete construction, and particularly discloses a mountainous area mass concrete pouring temperature monitoring system which comprises an output temperature control module, a pouring temperature control module, a stirring water temperature monitoring module, a cooling water temperature monitoring module and a concrete temperature monitoring module. The stirring water temperature monitoring module is used for acquiring the water temperature in the water tank of the mixing station; the cooling water temperature monitoring module is used for acquiring water inlet and outlet parameters of each layer of cooling water pipe; the concrete temperature monitoring module is used for acquiring monitoring parameters of a concrete sensor; the out-machine temperature control module is used for controlling the water temperature in the water tank according to the obtained water tank temperature parameters; and the pouring temperature control module is used for obtaining a temperature adjusting relation according to the obtained water inlet temperature, water flow, water outlet temperature and concrete temperature of each layer of cooling water pipe, and controlling and adjusting at least one water inlet and outlet parameter or water inlet and outlet direction until the concrete temperature is smaller than a preset range. According to the scheme, various problems caused by the temperature of water for concrete mixing during existing concrete construction and cooling water in concrete pouring due to manual operation are solved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete construction, and in particular to a temperature monitoring system for pouring large-volume concrete in mountainous areas. Background Art

[0002] The cap of the Canyon Bridge is a large-volume concrete cap with a rectangular shape. The size of a single cap is 21.8m×29.6m and the height is 8m. The cap is cast with C45 concrete. 3 , with a large volume, it is cast in one time. Since the cap is a large volume of concrete, effective measures must be taken to prevent cracks caused by temperature stress, concrete shrinkage, etc. In order to control the hydration heat generated by concrete pouring, the concrete temperature must be controlled. During the curing process, the hydration heat causes the temperature of the concrete to rise by 25°C, resulting in an increase in the volume of the concrete. After curing, the temperature of the concrete drops and the volume decreases. This process usually causes cracks in the dam. Therefore, the initial pouring temperature of the concrete should control the corresponding concrete outlet temperature according to different concrete grades to ensure that the maximum temperature of the concrete during the curing period does not exceed the specified temperature of the design unit.

[0003] At present, during the construction of large-volume concrete structures, the concrete cooling water flow regulation method and the concrete mixing water temperature are usually manually operated to change the water flow and reach the specified value. However, due to factors such as changes in the water pressure of the water supply system, the cooling water flow may deviate from the set value, thereby having an adverse effect on the cooling of the concrete structure. In addition, there are many uncertainties in manual control, and there may be problems such as flow control errors, untimely control, and inability to adjust at any time according to changes in concrete temperature. In addition, since the existing temperature monitoring sensors are usually buried in concrete and solidify into one with the concrete during pouring, once the temperature sensor fails, it will be impossible to maintain or replace it, resulting in a greater risk. Summary of the invention

[0004] The present invention provides a temperature monitoring system for mass concrete pouring in mountainous areas to solve various problems caused by manual operation of the temperature of concrete mixing water during existing concrete construction and cooling water during concrete pouring.

[0005] To solve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a temperature monitoring system for pouring large-volume concrete in mountainous areas, including a temperature monitoring unit, an outlet temperature control module, and a pouring temperature control module;

[0006] The temperature monitoring unit includes a mixing water temperature monitoring module, a cooling water temperature monitoring module, and a concrete temperature monitoring module;

[0007] The mixing water temperature monitoring module is used to obtain the water temperature in the concrete mixing station water tank according to the sensor in the concrete mixing station water tank;

[0008] The cooling water temperature monitoring module is used to obtain the inlet and outlet parameters of each layer of cooling water pipes embedded inside the concrete during pouring. The inlet and outlet parameters include the inlet temperature, outlet temperature and water flow rate of each layer of cooling water pipes.

[0009] The concrete temperature monitoring module is used to obtain the monitoring parameters of the concrete sensors embedded in each layer when pouring concrete. The monitoring parameters include the concrete temperature of each layer.

[0010] The outlet temperature control module controls the water temperature in the water tank according to the obtained water tank temperature parameters;

[0011] The pouring temperature control module obtains the temperature regulation relationship between the inlet temperature, water flow rate, outlet temperature and concrete temperature of each layer of cooling water pipes of the concrete according to the obtained inlet temperature, water flow rate, outlet temperature and concrete temperature of each layer of cooling water pipes, and obtains the predicted concrete temperature according to the temperature regulation relationship, the inlet temperature, water flow rate and outlet temperature of each layer of cooling water pipes, compares the predicted concrete temperature with the preset range of concrete temperature, and controls and adjusts at least one inlet and outlet parameter until the concrete temperature reaches the preset range of concrete temperature.

[0012] The basic principle of this scheme is: cooling water pipes and concrete sensors are pre-buried in concrete on each layer. By obtaining the data of the inlet temperature, outlet temperature, water flow rate and concrete temperature of each cooling water pipe, the data is fitted to obtain the temperature regulation relationship between the inlet temperature, outlet temperature, water flow rate and concrete temperature of each layer of cooling water pipes. Based on the temperature regulation relationship and the actual inlet temperature, outlet temperature and water flow rate of each layer of cooling water pipes, the predicted temperature of the concrete under the input conditions of the inlet temperature, outlet temperature and water flow rate is predicted. The predicted temperature of the concrete is compared with the preset concrete temperature range, and the inlet temperature and water flow rate are controlled until the concrete temperature reaches the preset range of the concrete temperature.

[0013] The beneficial effects of this program are:

[0014] Furthermore, it also includes a balance adjustment module;

[0015] The balance adjustment module is used to control the inlet and outlet directions of each layer of cooling water pipes according to the inlet and outlet temperature difference of each layer of cooling water pipes; when the inlet and outlet temperature difference exceeds the preset range, the inlet and outlet directions are changed. Since water enters one side and exits the other side, the temperature near the inlet end on each layer is lower and the outlet end is higher. In order to avoid excessive inlet and outlet temperature difference and uneven heat dissipation, the inlet and outlet directions are reversed through the balance adjustment module to ensure uniform temperature distribution of each layer of concrete.

[0016] Furthermore, it also includes a cooling device, which is communicatively connected to the outlet temperature control module. The outlet temperature control module is used to control the cooling device to put ice flakes into the water tank when the water tank temperature is higher than a preset temperature range.

[0017] Furthermore, it also includes a heating device, which is communicatively connected to the outlet temperature control module. The outlet temperature control module is used to control the heating device to heat the stirring water in the water tank when the water tank temperature is lower than a preset temperature range.

[0018] Further, it also includes an alarm module;

[0019] The alarm module is connected to the mixing water temperature monitoring module, the cooling water temperature monitoring module, and the concrete temperature monitoring module in communication;

[0020] The alarm module is used to send out an alarm signal when the water temperature or water volume in the water tank exceeds a preset range.

[0021] Furthermore, the number of cooling water pipes on each layer is 4, and each cooling water pipe is distributed in a serpentine shape.

[0022] Furthermore, the angles between adjacent layers of cooling water pipes differ by 90 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural block diagram of an embodiment of the present invention; Figure 2 is a schematic diagram of an embodiment of the present invention; Figure 3 Schematic diagram of the connection between the first cooling water pipe and the first and second water inlet pipes in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The figure marks in the drawings of the specification include: cooling water pipe 1, first water inlet pipe 21, second water inlet pipe 22, first solenoid valve 31, second solenoid valve 32, main pipe three-way valve 4, water change three-way valve 5, pouring concrete 6, temperature sensor 7, water inlet temperature sensor 71, water outlet temperature sensor 72.

[0027] The embodiment is basically as shown in the attached Figures 1 to 3 As shown:

[0028] The large volume concrete in this example is the bridge cap, which is arranged in a rectangular shape. The size of a single cap is 21.8m×29.6m, and the height is 8m. The cap is cast with C45 concrete. 3The volume is large and it is cast in one time. The cap is a large volume of concrete. This embodiment takes effective measures to prevent cracks caused by temperature stress, concrete shrinkage, etc., and makes technical improvements in equipment, temperature control, etc.

[0029] Temperature monitoring system for pouring large-volume concrete in mountainous areas, including temperature monitoring unit, outlet temperature control module, and pouring temperature control module;

[0030] The temperature monitoring unit includes a mixing water temperature monitoring module, a cooling water temperature monitoring module, and a concrete temperature monitoring module;

[0031] The mixing water temperature monitoring module is used to obtain the water temperature in the concrete mixing station water tank according to the sensor in the concrete mixing station water tank;

[0032] The cooling water temperature monitoring module is used to obtain the inlet and outlet parameters of each layer of cooling water pipes embedded inside the concrete during pouring. The inlet and outlet parameters include the inlet temperature, outlet temperature and water flow rate of each layer of cooling water pipes.

[0033] The concrete temperature monitoring module is used to obtain the monitoring parameters of the concrete sensors embedded in each layer when pouring concrete. The monitoring parameters include the concrete temperature of each layer.

[0034] The outlet temperature control module controls the water temperature in the water tank according to the obtained water tank temperature parameters;

[0035] The pouring temperature control module obtains the temperature regulation relationship between the inlet temperature, water flow rate, outlet temperature and concrete temperature of each layer of cooling water pipes of the concrete according to the obtained inlet temperature, water flow rate, outlet temperature and concrete temperature of each layer of cooling water pipes, and obtains the predicted concrete temperature according to the temperature regulation relationship, the inlet temperature, water flow rate and outlet temperature of each layer of cooling water pipes, compares the predicted concrete temperature with the preset range of concrete temperature, and controls and adjusts at least one inlet and outlet parameter to make the concrete temperature reach the preset range of concrete temperature.

[0036] Also includes a balance adjustment module;

[0037] The balance adjustment module is used to control the inlet and outlet directions of each layer of cooling water pipes according to the inlet and outlet temperature difference of each layer of cooling water pipes; when the inlet and outlet temperature difference exceeds the preset range, the combination of inlet and outlet water is changed.

[0038] The specific combination method is as follows: in this embodiment, four pipes are normally connected in series; however, if the predicted temperature of the last pipe is high, this pipe is separated and supplied with water alternately with the first three pipes;

[0039] If the predicted temperatures of the two rear pipes are both high, the front two pipes and the rear two pipes are supplied with water alternately;

[0040] If the predicted temperatures of the three pipes at the rear are all high, the front pipe and the three pipes at the rear will be supplied with water alternately;

[0041] If alternating water supply cannot solve the problem of predicted high temperature, use fast water for replacement.

[0042] It also includes a cooling device, which is communicatively connected to the outlet temperature control module. The outlet temperature control module is used to control the cooling device to put ice flakes into the water tank when the water tank temperature is higher than a preset temperature range.

[0043] Also includes an alarm module;

[0044] The alarm module is connected to the mixing water temperature monitoring module, the cooling water temperature monitoring module, and the concrete temperature monitoring module in communication;

[0045] The alarm module is used to send out an alarm signal when the water temperature or water volume in the water tank exceeds a preset range.

[0046] In this embodiment, the number of cooling water pipes 1 in each layer is 4, and each cooling water pipe 1 is in the shape of a "J", and the entire layer of cooling water pipes 1 is distributed in a serpentine shape. The water inlet and outlet of each cooling water pipe 1 extend to the outside of the poured concrete 6 and are respectively installed with temperature sensors 7. A first water inlet pipe 21 and a second water inlet pipe 22 are installed on the outside of a layer of cooling water pipes 1. The first solenoid valve 31 and the second solenoid valve 32 are respectively installed at the head ends of the first water inlet pipe 21 and the second water inlet pipe 22. The water inlet and outlet of each cooling water pipe 1 are connected to the first water inlet pipe 21 and are connected to the first water inlet pipe 21 through the main three-way valve 4. A water changing three-way valve 5 is installed between each temperature sensor 7 and each main three-way valve 4, and the water changing three-way valve 5 is respectively connected to the external second water inlet pipe 22.

[0047] The water flow rates transported in the first water inlet pipe 21 and the second water inlet pipe 22 are different, wherein the flow rate in the first water inlet pipe 21 is slow, and the flow rate in the second water inlet pipe 22 is fast. The first solenoid valve 31, the second solenoid valve 32, the main three-way valve 4, the water exchange three-way valve 5, and the temperature sensor 7 are all electrically connected to the external controller. In this embodiment, multiple layers of cooling water pipes 1 are arranged in the concrete according to the height, and the angles between adjacent layers of cooling water pipes 1 differ by 90 degrees. Thus, the cooling water pipes 1 between different layers can be cross-distributed, so that the temperature control in the concrete is more uniform.

[0048] The specific implementation process is as follows:

[0049] like Figure 3As shown, the three ports on the main three-way valve 4 are marked as d, e, and f, and the three ports on the water exchange three-way valve 5 are marked as a, b, and c. In normal use, the pouring temperature control module can obtain the inlet temperature and outlet temperature of each cooling water pipe according to the inlet temperature sensor and outlet temperature sensor of each cooling water pipe, so that the predicted concrete temperature is kept within the preset temperature range. In this process, it is not necessary to adjust the parameters of the water inlet and outlet. The water flow in the second solenoid valve does not enter the cooling water pipe. The water exchange three-way valve 5 on the second water inlet pipe 22 is a and b connected, and c is cut off. Circulating water is introduced into the cooling water pipe 1, and the first solenoid valve 31 is opened. The circulating water flows from left to right along the first water inlet pipe 21. When passing through the main three-way valve 4 on the water inlet of the first cooling water pipe 1, e and d are connected, and f is cut off. After the first solenoid valve is opened, the circulating water enters the first cooling water pipe 1 along the ed path, flows along the first cooling water pipe 1 to the main three-way valve at the outlet of the first cooling water pipe. The main three-way valve is d and f connected, and e is cut off. The circulating water flows out of the first cooling water pipe 1 along the eddf path, and the inlet temperature and outlet temperature of the cooling water pipe 1 are respectively obtained through the inlet temperature sensor 71 and the outlet temperature sensor 72 of the first cooling water pipe 1. In this way, the inlet temperature and outlet temperature of all cooling water pipes 1 in a layer can be obtained.

[0050] As the heat exchange continues, when the concrete temperature monitoring module detects that the concrete temperature exceeds the preset temperature, it means that the heat exchange efficiency in the cooling water pipe needs to be improved. First, the alternating water supply inlet and outlet method is adopted. If the alternating water supply cannot reach the preset temperature range, the rapid replacement water inlet and outlet method is adopted.

[0051] The specific alternating water supply method is: in this embodiment, under normal circumstances, four pipes are connected in series; however, if the inlet and outlet water temperatures of the last cooling water pipe are high, this pipe is separated out and supplied with water alternately with the previous three pipes; that is, the first solenoid valve is always open, but the last cooling water pipe does not receive circulating water at the same time as the previous three pipes. First, the first three pipes are supplied with water according to the eddf path respectively, and the last pipe efef is not supplied with water. Then, the first three pipes are not supplied with water according to the efef path, and the last pipe is directly supplied with water through the eddf method.

[0052] If the inlet and outlet water temperatures of the two rear pipes are both high, the front two pipes and the rear two pipes will supply water alternately;

[0053] If the inlet and outlet water temperatures of the three rear pipes are all high, the front pipe and the three rear pipes will supply water alternately;

[0054] If alternating water supply cannot solve the problem of predicted high temperature, use fast water for replacement.

[0055] The specific method of rapid water replacement is: by replacing the circulating water in the cooling water pipe, the cooling water pipe is filled with circulating water at a lower temperature so that the concrete temperature reaches the preset range of the concrete temperature. Specifically, when the pouring temperature control module obtains that the temperature of a cooling water pipe 1 is higher than the predicted temperature of the concrete, the water flow in the cooling water pipe needs to be replaced. In addition, since the circulating water in the cooling water pipes from left to right gradually undergoes heat exchange, the circulating water temperature in the cooling water pipe on the left is low, and the circulating water temperature increases as it goes to the right; at this time, the first cooling water pipe with a temperature higher than the predicted temperature of the concrete is used as the starting point for grouping, and it is grouped with all the cooling water pipes on its right, and the circulating water of this group of cooling water pipes is replaced at the same time. For example, in this scheme, the number of cooling water pipes on one layer is 4. If the outlet temperature of the first cooling water pipe is higher than the predicted temperature, the four cooling water pipes are grouped together and the water is changed through the second solenoid valve at the same time; if the outlet temperature of the second cooling water pipe is higher than the predicted temperature, the second, third and fourth cooling water pipes are grouped together and the water is changed at the same time; if the outlet temperature of the third cooling water pipe is higher than the predicted temperature, the third and fourth cooling water pipes are grouped together and the water is changed at the same time; if the outlet temperature of the fourth cooling water pipe is higher than the predicted temperature, the water is changed for the fourth cooling water pipe alone.

[0056] The specific water changing step is to open the second solenoid valve 32, connect e and f on all the main three-way valves 4 in a group of cooling water pipes 1 that need water changing, and cut off d. The circulating water of the cooling water pipes that do not need water changing still flows to the subsequent cooling water pipes 1 along the eddf path. When the water flows to a group of cooling water pipes that need water changing, the water flows along the efef path, and the water changing three-way valve on the water inlet of the first cooling water pipe in the group is switched to a and c connected, b cut off, and the water changing three-way valve on the water outlet is switched to c and b connected, a cut off, so that the circulating water with a fast flow rate in the second water inlet can quickly enter the cooling water pipe 1 for replacement. Therefore, this solution can switch the states of the water changing three-way valve 5, the main three-way valve 4, the first and second solenoid valves 32 through the controller to ensure that the cooling water pipes 1 of each layer can maintain balanced inlet and outlet water temperatures. At the same time, when the temperature sensor 7 fails, because the temperature sensor 7 is installed outside the concrete, it will not affect the maintenance and replacement work, ensuring that the temperature monitoring work of the concrete can be carried out smoothly.

[0057] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Temperature monitoring system for mass concrete pouring in mountainous areas, characterized by: Including temperature monitoring unit, machine temperature control module, pouring temperature control module; The temperature monitoring unit includes a mixing water temperature monitoring module, a cooling water temperature monitoring module, and a concrete temperature monitoring module; The mixing water temperature monitoring module is used to obtain the water temperature in the concrete mixing station water tank according to the sensor in the concrete mixing station water tank; The cooling water temperature monitoring module is used to obtain the inlet and outlet parameters of each layer of cooling water pipes embedded inside the concrete during pouring. The inlet and outlet parameters include the inlet temperature, outlet temperature and water flow rate of each layer of cooling water pipes. The concrete temperature monitoring module is used to obtain the monitoring parameters of the concrete sensors embedded in each layer when pouring concrete. The monitoring parameters include the concrete temperature of each layer. The outlet temperature control module controls the water temperature in the water tank according to the obtained water tank temperature parameters; The pouring temperature control module obtains the temperature regulation relationship between the inlet temperature, water flow rate, outlet temperature and concrete temperature of each layer of cooling water pipes of the concrete according to the obtained inlet temperature, water flow rate, outlet temperature and concrete temperature of each layer of cooling water pipes, and obtains the predicted concrete temperature according to the temperature regulation relationship, the inlet temperature, water flow rate and outlet temperature of each layer of cooling water pipes, compares the predicted concrete temperature with the preset range of concrete temperature, and controls and adjusts at least one inlet and outlet parameter until the concrete temperature reaches the preset range of concrete temperature.

2. The temperature monitoring system for pouring large-volume concrete in mountainous areas according to claim 1 is characterized in that: Also includes a balance adjustment module; The balancing and regulating module is used to control the inlet and outlet directions of each layer of cooling water pipes according to the inlet and outlet temperature difference of each layer of cooling water pipes; when the inlet and outlet temperature difference exceeds a preset range, the inlet and outlet water combination is changed.

3. The temperature monitoring system for pouring large-volume concrete in mountainous areas according to claim 2 is characterized in that: It also includes a cooling device, which is communicatively connected to the outlet temperature control module. The outlet temperature control module is used to control the cooling device to put ice flakes into the water tank when the water tank temperature is higher than a preset temperature range.

4. The temperature monitoring system for pouring large-volume concrete in mountainous areas according to claim 3 is characterized in that: It also includes a heating device, which is communicatively connected to the outlet temperature control module. The outlet temperature control module is used to control the heating device to heat the stirring water in the water tank when the water tank temperature is lower than a preset temperature range.

5. The temperature monitoring system for pouring large-volume concrete in mountainous areas according to claim 4 is characterized in that: Also includes an alarm module; The alarm module is connected to the mixing water temperature monitoring module, the cooling water temperature monitoring module, and the concrete temperature monitoring module in communication; The alarm module is used to send out an alarm signal when the water temperature or water volume in the water tank exceeds a preset range.

6. The temperature monitoring system for pouring large-volume concrete in mountainous areas according to claim 5 is characterized in that: The number of cooling water pipes on each layer is 4, and each cooling water pipe is distributed in a serpentine shape.

7. The temperature monitoring system for pouring large-volume concrete in mountainous areas according to claim 6 is characterized in that: The angles between the cooling water pipes in adjacent layers differ by 90 degrees.

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