Temperature difference control system and method for mass concrete

Abstract

The invention discloses a temperature difference control system for mass concrete, which comprises a metal protective pipe pre-buried in the concrete, the bottom of the metal protective pipe is sealed, and the top of the metal protective pipe is higher than the top surface of the concrete by a set distance; the heat insulation plugging piece seals the top of the metal protection pipe; the internal temperature measurement module is used for detecting the internal temperature of the concrete; the external temperature measuring module is used for detecting the surface temperature of the concrete; the host is in communication connection with the internal temperature measurement module and the external temperature measurement module; the cooling device comprises a cooling water pipe, a water pump and a water pump controller, the cooling water pipe is pre-buried in concrete, the water inlet end of the water pump is communicated with a water source, the water outlet end of the water pump is communicated with the cooling water pipe, and the water pump controller is electrically connected with the water pump and controlled by the main machine; the invention further discloses a temperature difference control method of the mass concrete. The temperature difference control system and method for the mass concrete have the advantages of being convenient to construct, low in construction cost and capable of effectively improving the temperature difference control accuracy and timeliness.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete construction, and in particular to a temperature difference control system and a control method for large-volume concrete. Background Art

[0002] During large-volume concrete construction, due to the thickness of the concrete structure and the concentrated and prolonged release of hydration heat, internal heat is difficult to dissipate effectively, easily leading to significant temperature differences between the inside and outside. This temperature difference causes uneven thermal expansion and contraction of the concrete, leading to structural cracks and seriously compromising the quality and durability of the project. This problem is exacerbated in areas with unique climates, such as plateaus, where large diurnal temperature swings and low ambient temperatures are present.

[0003] The currently commonly used solution is to pre-embed condensation water pipes inside the concrete for cooling. However, traditional implementation methods have many defects: first, it is necessary to manually measure the temperature inside and outside the concrete at regular intervals, and adjust the cooling water flow by manually calculating the temperature difference. This method not only consumes a lot of manpower, but also has obvious lag in temperature monitoring, resulting in untimely and inaccurate cooling water adjustment. Secondly, temperature monitoring is disconnected from cooling control, making it difficult to achieve a rapid response to temperature differences, which not only affects the temperature control effect but also causes waste of water resources. In addition, some new technologies attempt to pre-embed temperature sensors during pouring, but there is a problem that the sensors are easily displaced and damaged and cannot be recycled. Especially in plateau areas where transportation is inconvenient, this one-time use method significantly increases construction costs. These defects together lead to unsatisfactory temperature difference control effects for large-volume concrete, making it difficult to meet the requirements of modern engineering for construction accuracy and resource efficiency.

[0004] Therefore, how to provide a temperature difference control system and control method that can improve construction efficiency and reduce construction costs while improving the accuracy and timeliness of temperature difference control inside and outside concrete has become a technical problem that needs to be solved. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a temperature difference control system and control method for large-volume concrete, which has the advantages of realizing real-time monitoring and intelligent regulation of the internal and external temperatures of concrete, improving temperature difference control accuracy, construction efficiency and reducing construction costs.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a temperature difference control system for mass concrete, comprising:

[0007] A metal protective tube embedded in the concrete, wherein the bottom of the metal protective tube is sealed and adjacent to or near the midpoint of the concrete in the thickness direction, and the top of the metal protective tube is a set distance above the top surface of the concrete;

[0008] A heat-insulating plugging piece is provided on the top of the metal protective tube and seals the top of the metal protective tube;

[0009] Internal temperature measurement module, placed at the bottom of the metal protective tube to detect the internal temperature of the concrete;

[0010] An external temperature measurement module is placed on the concrete surface to detect the surface temperature of the concrete;

[0011] The host is connected to the internal temperature measurement module and the external temperature measurement module respectively, and is used to receive the real-time temperature transmitted from the internal temperature measurement module and the external temperature measurement module to realize real-time monitoring of the internal and external temperatures of the concrete, and at the same time analyze the received real-time temperature to obtain the real-time temperature difference of the concrete;

[0012] The cooling device includes a cooling water pipe, a water pump and a water pump controller. The cooling water pipe is pre-buried in concrete, the water inlet of the water pump is connected to the water source, the water outlet of the water pump is connected to the cooling water pipe, and the water pump controller is electrically connected to the water pump and is controlled by the host.

[0013] Furthermore, the bottom of the metal protective tube is sealed with a concrete block made of the same material as the concrete; the internal temperature measurement module includes an infrared temperature sensor, the detection end of the infrared temperature sensor is arranged downward to detect the temperature of the concrete block, and the infrared temperature sensor is electrically connected to the host.

[0014] Furthermore, the external temperature measurement module includes a surface-mounted thermocouple attached to the concrete surface, and the surface-mounted thermocouple is electrically connected to the host.

[0015] Furthermore, the wall thickness of the metal protective tube is in the range of 1-2.5 mm.

[0016] Furthermore, the heat-insulating sealing piece completely wraps the exposed section of the top of the metal protective tube.

[0017] Furthermore, it also includes an early warning module, which is controlled by the host and is used to issue an alarm when the real-time temperature difference value processed by the host is greater than the set temperature difference threshold for a long time, where: a long time means greater than 2 hours, and the set temperature difference threshold range is 20-25 degrees Celsius.

[0018] Furthermore, the set distance between the top of the metal protective pipe and the top surface of the concrete is in the range of 5-10 cm.

[0019] A method for controlling the temperature difference of large-volume concrete is also provided. The method utilizes the temperature difference control system described above to control the temperature difference of concrete, and includes the following steps:

[0020] S1: Install the temperature difference control system;

[0021] S2: concrete temperature difference control, including controlling the opening and closing and flow of the water pump according to the real-time temperature difference value of the inside and outside of the concrete obtained by the host analysis;

[0022] S3: after the concrete strength reaches the standard, the temperature difference control system is removed.

[0023] Further, the rule of real-time control of the opening and closing and flow of the water pump in step S2 is that when the real-time temperature difference value is greater than the set temperature difference threshold value, the water pump is automatically opened, and the greater the real-time temperature difference value, the greater the flow of the water pump; when the real-time temperature difference value decreases to the set temperature difference safety value, the water pump is automatically closed, and the temperature difference safety value is in the range of 15-20 degrees Celsius.

[0024] Further, the step of installing the temperature difference control system in step S1 includes:

[0025] S11: before pouring the concrete, the metal protective pipe and the cooling water pipe are fixed and installed;

[0026] S12: pouring the concrete;

[0027] S13: after the concrete reaches the strength that personnel can pass through, the internal temperature measurement module is installed from the top of the metal protective pipe, then the top of the metal protective pipe is sealed, and then the installation of the external temperature measurement module, the host, the water pump and the water pump controller is completed.

[0028] The beneficial effects of the present application are as follows:

[0029] The temperature difference control system and control method of the mass concrete provided by the present application have the advantages of realizing real-time monitoring and intelligent control of the inside and outside temperatures of the concrete, improving the temperature difference control precision, construction efficiency and reducing the construction cost. Specifically, the present application realizes real-time monitoring and automatic adjustment of the inside and outside temperatures of the concrete by embedding the metal protective pipe and the cooling water pipe, cooperating with the internal and external temperature measurement modules and the intelligent control system, and solves the problems of traditional manual temperature measurement lag and inaccurate cooling control. At the same time, the internal and external temperature measurement modules of the present temperature difference control system can be recycled after the concrete pouring and curing process is completed, which improves the resource utilization rate and reduces the construction cost; and through the protection and positioning of the metal protective pipe, the internal temperature measurement module can be installed after the pouring construction is completed, so as to ensure the position accuracy of the internal temperature measurement module and accurately measure the temperature of the core area of the mass concrete. The temperature difference control system and control method of the mass concrete are particularly suitable for the construction of mass concrete in plateau areas.

[0030] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure numerals: 1-concrete; 2-metal protective pipe; 3-thermal insulation sealing piece; 4-internal temperature measurement module; 5-external temperature measurement module; 6-host; 7-cooling water pipe; 8-water pump; 9-water pump controller; 10-concrete block; 11-early warning module. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] See also Figure 1 This embodiment discloses a temperature differential control system for large-volume concrete 1, comprising: a metal protective tube 2, a thermal insulation plugging member 3, an internal temperature measurement module 4, an external temperature measurement module 5, a host computer 6, and a cooling device. The metal protective tube 2 is pre-embedded in the concrete 1. The bottom of the metal protective tube 2 is sealed and located adjacent to or near the midpoint of the concrete 1 in the thickness direction, and the top of the metal protective tube 2 is a set distance above the top surface of the concrete 1. The thermal insulation plugging member 3 is disposed on the top of the metal protective tube 2 and seals the top of the metal protective tube 2. The internal temperature measurement module 4 is positioned at the bottom of the metal protective tube 2 to detect the internal temperature of the concrete 1. The external temperature measurement module 5 is positioned on the surface of the concrete 1 to detect the surface temperature of the concrete 1. The host computer 6 is communicatively connected to the internal and external temperature measurement modules 4 and 5, respectively, and is configured to receive real-time temperature signals transmitted from the internal and external temperature measurement modules 4 and 5, enabling real-time monitoring of the internal and external temperatures of the concrete 1. The received real-time temperatures are analyzed to determine the real-time temperature differential of the concrete 1. The cooling device includes a cooling water pipe 7, a water pump 8 and a water pump controller 8. The cooling water pipe 7 is pre-buried in the concrete 1. The water inlet end of the water pump 8 is connected to the water source, and the water outlet end of the water pump 8 is connected to the cooling water pipe 7. The water pump controller 8 is electrically connected to the water pump 8 and is controlled by the host 6.

[0035] Specifically, the metal protective tube 2 can be made of stainless steel or galvanized steel. Its bottom seal and top are set a distance above the top surface of the concrete 1 to prevent mortar from sinking into the metal protective tube 2 during concrete pouring. The thermal insulation plug 3 can be made of polyurethane foam or a rubber plug, achieving a seal through an interference fit. The thermal insulation plug 3 is used to ensure the stability of the internal temperature of the metal protective tube 2 and prevent heat from escaping from the top of the metal protective tube 2 and affecting the accuracy of the measurement results. Both the internal and external temperature measurement modules 4 can be equipped with platinum resistance sensors, thermocouple sensors, infrared temperature sensors, etc. The host computer 6 (host computer) can be an industrial control computer or PLC controller with a built-in temperature difference calculation algorithm. The cooling water pipe 7 can be a metal bellows, the water pump 8 can be a centrifugal pump or a submersible pump, and the water pump controller 8 can be a frequency converter or relay control module.

[0036] This technical solution protects the internal temperature measurement module 4 with a metal protective tube 2, preventing damage during pouring and enabling the recyclability of the temperature sensor. Furthermore, the internal temperature measurement module 4 serves as a positioning mechanism, controlling the accuracy of its installation position through the position of the metal protective tube 2. Here, the bottom of the metal protective tube 2 is located adjacent to or near the midpoint of the thickness of the concrete 1, enabling the real-time temperature of the central area of ​​the concrete 1 to be determined. Dual temperature measurement modules monitor the internal and external temperatures of the concrete 1 in real time, while the main unit 6 automatically calculates the temperature difference and controls the cooling water flow, resolving the issues of untimely and inaccurate manual temperature measurement and control. Compared to existing technologies, this system automates temperature difference monitoring and control, improving control accuracy and response speed while reducing labor costs and equipment loss. The provision of the metal protective tube 2 ensures accurate temperature monitoring while facilitating subsequent removal and recycling, making it particularly suitable for areas with harsh construction conditions, such as plateaus.

[0037] In this embodiment, the bottom of the metal protective tube 2 is sealed with a concrete block 10 made of the same material as the concrete 1; the internal temperature measurement module 4 includes an infrared temperature sensor, the detection end of the infrared temperature sensor is arranged downward to detect the temperature of the concrete block 10, and the infrared temperature sensor is electrically connected to the host 6.

[0038] Specifically, the concrete block 10 at the bottom of the metal protective tube 2 can be cast using fine aggregate concrete 1 with the same mix as the main concrete 1. Its dimensions must match the inner diameter of the protective tube to ensure a tight seal. The infrared temperature sensor can be installed, but is not limited to: threaded connection to the bottom bracket of the protective tube, or directly adhered to the surface of the concrete block 10 using a high-temperature-resistant adhesive. When positioned with the detection end facing downward, a detection distance of 5-10 mm between the sensor lens and the top surface of the concrete block 10 must be maintained to ensure accurate temperature measurement. Signal transmission can use a four-core cable with a metal shield, with two cores for power supply and the remaining two for signal transmission.

[0039] This technical solution achieves precise temperature measurement through two key improvements: First, the use of homogeneous concrete 1 for sealing avoids temperature conduction errors caused by metal sealing heads while ensuring consistency with the thermal expansion coefficient of the main concrete 1. Second, infrared temperature measurement uses non-contact detection of the temperature of concrete block 10, indirectly reflecting the actual temperature inside concrete 1 through the principle of thermal radiation, which reduces structural interference. The temperature of the bottom concrete block 10 accurately reflects the real-time temperature of the concrete 1 at that location. While ensuring temperature measurement accuracy, this solution solves the problem of sensor recovery difficulties caused by buried sensors. The concrete 1 sealing structure also allows the temperature monitoring module to be installed after the concrete 1 has initially set, reducing the risk of construction damage.

[0040] In this embodiment, the external temperature measurement module 5 includes a surface-mounted thermocouple attached to the surface of the concrete 1, and the surface-mounted thermocouple is electrically connected to the host 6. Specifically, the surface-mounted thermocouple is fixed to the surface of the concrete 1 by direct bonding, and its temperature measuring end is in close contact with the surface of the concrete 1. The thermocouple wire is connected to the host 6 through a waterproof junction box, wherein the wire can be wrapped with a high-temperature resistant insulating material. As a preferred embodiment, the installation position of the thermocouple is selected in an area where the temperature gradient of the surface of the concrete 1 changes significantly, such as 20-30 cm from the edge. Furthermore, the thermocouple can be a K-type or T-type thermocouple, and its measurement accuracy can reach ±0.5°C. During the installation process, the surface of the concrete 1 must first be cleaned, then the thermocouple is fixed with a high-temperature adhesive, and finally the area around the temperature measurement point is covered with an insulating material.

[0041] This technical solution uses surface-mount thermocouples to accurately measure the surface temperature of concrete 1. Compared to traditional contact temperature measurement methods, it offers advantages such as easy installation, high measurement accuracy, and resistance to environmental interference. Specifically, the adhesive fixation method avoids measurement errors caused by traditional fixture installation. Second, the thermocouples are in direct contact with the surface of concrete 1, enabling rapid response to temperature changes. Third, the overall structure is simple and reliable, making them less susceptible to displacement or damage during construction. This solution provides an accurate data foundation for temperature differential control.

[0042] In this embodiment, the wall thickness of the metal protective tube 2 is in the range of 1-2.5 mm. The metal protective tube 2 in this thickness range is a thin-walled metal protective tube 2, which has a certain structural strength and a good heat transfer effect, which is conducive to ensuring that the temperature at the corresponding position inside the metal protective tube 2 is equivalent to the temperature of the concrete 1 at the corresponding height position.

[0043] In this embodiment, the heat-insulating sealing member 3 completely wraps the exposed section at the top of the metal protective tube 2 .

[0044] Specifically, the thermal insulation sealing member 3 can be completely encapsulated using a polyurethane foam material or a rubber sealing ring. The polyurethane foam is formed by on-site pouring and can tightly fill the gap between the metal protective tube 2 and the sealing member. The rubber sealing ring achieves sealing through an interference fit and can be installed using a thermal expansion and contraction method. Thus, this technical solution effectively blocks the interference of the external ambient temperature on the temperature measurement module within the metal protective tube 2 through a completely encapsulated sealing design. This not only solves the top sealing problem but also prevents lateral heat conduction. This design allows the temperature monitoring data to more accurately reflect the actual temperature within the concrete 1, providing a reliable data basis for temperature difference control.

[0045] This embodiment also includes an early warning module 11, which is controlled by the host computer 6 and is configured to issue an alarm if the real-time temperature difference value processed by the host computer 6 exceeds a set temperature difference threshold for a prolonged period of time. A prolonged period of time means greater than two hours, and the set temperature difference threshold range is 20-25 degrees Celsius. The early warning module 11 can employ an audible or visual alarm or buzzer as an alarm device and be connected to the host computer 6 via a wired or wireless connection. In specific implementations, the host computer 6 continuously monitors the temperature data collected by the internal temperature measurement module 4 and the external temperature measurement module 5 to calculate the real-time temperature difference between the inside and outside of the concrete 1. When the temperature difference exceeds the threshold range of 20-25 degrees Celsius and persists for more than two hours, the host computer 6 sends a trigger signal to the early warning module 11, which then activates an audible and visual alarm. In a preferred embodiment, the early warning module 11 can be integrated within the host computer 6, with the alarm information displayed synchronously on the host computer 6's display screen. Furthermore, the early warning module 11 can be configured with a remote communication unit to transmit the alarm information to the mobile terminal of the construction management personnel.

[0046] This technical solution, through the provision of an early warning module 11, automatically monitors and promptly alerts users of temperature anomalies in concrete 1. If the temperature difference between the interior and exterior of concrete 1 consistently exceeds a safe range, early warning module 11 promptly alerts construction personnel to take intervention measures to prevent cracking in concrete 1 caused by excessive temperature differences. More specifically, by setting a two-hour duration and a threshold range of 20-25 degrees Celsius, this system avoids false alarms caused by brief temperature fluctuations while also promptly identifying actual temperature risk.

[0047] In this embodiment, the distance between the top of the metal protective tube 2 and the top surface of the concrete 1 is set within a range of 5-10 cm. Specifically, by limiting the height of the top of the metal protective tube 2 above the top surface of the concrete 1 to a range of 5-10 cm, it is possible to ensure that the top of the metal protective tube 2 is neither too high to affect construction operations nor too low to cause installation difficulties or poor sealing effects for the thermal insulation plugging member 3.

[0048] Therefore, by limiting the height of the top of the metal protective tube 2 above the top surface of the concrete 1 to within a range of 5-10 cm, the installation quality and sealing effect of the thermal insulation seal 3 can be effectively guaranteed, thereby ensuring a stable operating environment for the internal temperature measurement module 4 and preventing external interference with temperature monitoring. This height range also takes into account construction convenience, making the installation and subsequent maintenance of the metal protective tube 2 more convenient. Compared with existing technologies, this technical solution, by precisely controlling the height of the top of the metal protective tube 2, can ensure temperature monitoring accuracy while reducing construction difficulty and improving the reliability and practicality of the system.

[0049] In this embodiment, a method for controlling the temperature difference of a large volume of concrete 1 is also provided. The method uses the temperature difference control system described above to control the temperature difference of the concrete 1, and includes the following steps:

[0050] S1: Install the temperature difference control system;

[0051] S2: Temperature difference control of concrete 1, including real-time control of the start and stop and flow rate of water pump 8 based on the real-time temperature difference between the inside and outside of concrete 1 analyzed by host 6;

[0052] S3: After the strength of the concrete 1 reaches the standard, the temperature difference control system is removed.

[0053] Specifically, during the installation of the temperature differential control system, the metal protective tube 2 and cooling water pipe 7 are first fixed and installed before pouring concrete 1. Concrete 1 is then poured. After the concrete 1 reaches a strength sufficient for personnel to pass through, the internal temperature measurement module 4 is installed from the top of the metal protective tube 2, and the top of the metal protective tube 2 is sealed. Finally, the external temperature measurement module 5, main unit 6, water pump 8, and water pump controller 8 are installed. During the temperature differential control step for concrete 1, the rules for real-time control of the on / off and flow rate of water pump 8 are as follows: when the real-time temperature differential value exceeds the set temperature differential threshold, water pump 8 is automatically turned on, and the larger the real-time temperature differential value, the greater the flow rate of water pump 8; when the real-time temperature differential value drops to the set temperature differential safety value, water pump 8 is automatically turned off.

[0054] This method achieves precise regulation of the internal and external temperature differential of large-volume concrete 1 through automated temperature monitoring and cooling water flow control. The use of pre-buried metal protective tubes 2 to install the internal temperature measurement module 4 prevents damage to the temperature monitoring module during the pouring process and facilitates subsequent removal and reuse. The host computer 6 analyzes temperature differential data in real time and automatically adjusts the flow rate of the water pump 8, addressing the response lag and lack of accuracy associated with traditional manual control methods. This effectively prevents cracking of the concrete 1 caused by excessive temperature differentials.

[0055] In this embodiment, the rules for real-time control of the opening and closing and flow rate of the water pump 8 in step S2 are: when the real-time temperature difference value is greater than the set temperature difference threshold value, the water pump 8 is automatically turned on, and the larger the real-time temperature difference value, the larger the flow rate of the water pump 8; when the real-time temperature difference value drops to the set temperature difference safety value, the water pump 8 is automatically turned off, and the value range of the temperature difference safety value is: 15-20 degrees Celsius. As a preferred embodiment, the flow control of the water pump 8 can be achieved by a frequency converter, and the cooling water flow rate is accurately controlled by adjusting the speed of the water pump 8 motor. The correspondence between the temperature difference value and the flow rate can adopt a linear proportional control algorithm. For example, for every 1 degree Celsius increase in the temperature difference, the flow rate of the water pump 8 increases by 5%. In addition, a step-by-step control strategy can also be adopted to divide the temperature difference range into multiple intervals, each interval corresponding to a fixed flow value.

[0056] This technical solution, by establishing a dynamic correlation between the temperature difference and the flow rate of water pump 8, achieves precise control of the cooling water volume. Compared to the manual adjustment methods used in existing technologies, this solution can automatically adjust the cooling intensity in real time based on the temperature difference, avoiding the lag associated with manual operation and preventing the waste of resources caused by excessive water supply. Specifically, by setting the temperature difference safety value below the temperature difference threshold, the internal temperature of concrete 1 can be ensured to smoothly transition to a safe state, effectively suppressing temperature rebound.

[0057] In this embodiment, the step of installing the temperature difference control system in step S1 includes:

[0058] S11: Before pouring the concrete 1, first fix and install the metal protective pipe 2 and the cooling water pipe 7;

[0059] S12: pouring concrete 1;

[0060] S13: After the concrete 1 reaches a strength sufficient for people to pass through, the internal temperature measurement module 4 is first installed from the top of the metal protective tube 2, and then the top of the metal protective tube 2 is sealed. Then, the installation of the external temperature measurement module 5, the main unit 6, the water pump 8, and the water pump controller 8 is completed.

[0061] The metal protective tube 2 is sealed at the bottom with a concrete block 10 made of the same material as the concrete 1. The internal temperature measurement module 4 uses an infrared temperature sensor with its detection end facing downward to detect the temperature of the concrete block 10. The external temperature measurement module 5 uses a surface-mount thermocouple attached to the surface of the concrete 1. The top of the metal protective tube 2 is 5-10 cm above the top surface of the concrete 1, and the exposed section is completely enclosed and filled with thermal insulation sealing members 3.

[0062] Specifically, the internal temperature measurement module 4 is installed after the concrete 1 reaches a passable strength, thus preventing displacement or damage to the temperature measurement module during the pouring process. The top of the metal sheath 2 is sealed with a thermally insulating plug 3, effectively preventing the external ambient temperature from affecting temperature measurement accuracy. As a preferred embodiment, the cooling water pipe 7 is installed simultaneously with the metal sheath 2, which helps ensure the stability of the overall system structure.

[0063] By optimizing the installation sequence and method of each module, this installation method ensures accurate temperature monitoring while avoiding the risk of damage to the temperature measurement modules during the pouring process. Compared with existing technologies, this method offers advantages such as convenient construction, reusable equipment, and high installation precision. It can effectively address the high construction costs and inaccurate temperature monitoring issues associated with temperature differential control of large-volume concrete in plateau regions.

[0064] Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A temperature difference control system for mass concrete, characterized in that: include: A metal protective tube embedded in the concrete, wherein the bottom of the metal protective tube is sealed and adjacent to or near the midpoint of the concrete in the thickness direction, and the top of the metal protective tube is a set distance above the top surface of the concrete; A heat-insulating plugging piece is provided on the top of the metal protective tube and seals the top of the metal protective tube; Internal temperature measurement module, placed at the bottom of the metal protective tube to detect the internal temperature of the concrete; An external temperature measurement module is placed on the concrete surface to detect the surface temperature of the concrete; The host is connected to the internal temperature measurement module and the external temperature measurement module respectively, and is used to receive the real-time temperature transmitted from the internal temperature measurement module and the external temperature measurement module to realize real-time monitoring of the internal and external temperatures of the concrete, and at the same time analyze the received real-time temperature to obtain the real-time temperature difference of the concrete; The cooling device includes a cooling water pipe, a water pump and a water pump controller. The cooling water pipe is pre-buried in concrete, the water inlet of the water pump is connected to the water source, the water outlet of the water pump is connected to the cooling water pipe, and the water pump controller is electrically connected to the water pump and is controlled by the host.

2. The temperature difference control system for mass concrete according to claim 1, characterized in that: The bottom of the metal protective pipe is sealed with concrete blocks made of the same material as the concrete; The internal temperature measurement module includes an infrared temperature sensor, the detection end of the infrared temperature sensor is arranged downward to detect the temperature of the concrete block, and the infrared temperature sensor is electrically connected to the host.

3. The temperature difference control system for mass concrete according to claim 2, characterized in that: The external temperature measurement module includes a surface-mounted thermocouple attached to the concrete surface, and the surface-mounted thermocouple is electrically connected to the host.

4. The temperature difference control system for mass concrete according to claim 1, characterized in that: The wall thickness of the metal protective tube ranges from 1 to 2.5 mm.

5. The temperature difference control system for mass concrete according to claim 1, characterized in that: The heat-insulating sealing piece completely wraps the exposed section of the top of the metal protective pipe.

6. The temperature difference control system for mass concrete according to claim 1, characterized in that: It also includes an early warning module, which is controlled by the host and is used to issue an alarm when the real-time temperature difference value processed by the host is greater than the set temperature difference threshold for a long time, where: a long time means greater than 2 hours, and the set temperature difference threshold range is 20-25 degrees Celsius.

7. The temperature difference control system for mass concrete according to claim 1, characterized in that: The set distance between the top of the metal protective pipe and the top surface of the concrete is in the range of 5-10 cm.

8. A method for controlling temperature difference of large volume concrete, characterized by: The temperature difference control system according to any one of claims 1 to 7 is used to control the temperature difference of concrete, comprising the following steps: S1: Install the temperature difference control system; S2: Concrete temperature difference control, including real-time control of the water pump opening and closing and flow rate based on the host analysis of the real-time temperature difference between the inside and outside of the concrete; S3: After the concrete strength reaches the standard, the temperature difference control system is removed.

9. The temperature difference control method for mass concrete according to claim 8, characterized in that: The rules for real-time control of the opening and closing of the water pump and the flow rate in step S2 are: when the real-time temperature difference is greater than the set temperature difference threshold, the water pump is automatically turned on, and the larger the real-time temperature difference is, the greater the flow rate of the water pump is; when the real-time temperature difference drops to the set temperature difference safety value, the water pump is automatically turned off, and the value range of the temperature difference safety value is: 15-20 degrees Celsius.

10. The temperature difference control method for mass concrete according to claim 8, characterized in that: The steps of installing the temperature difference control system in step S1 include: S11: Before pouring concrete, securely install the metal protective pipe and cooling water pipe; S12: pouring concrete; S13: After the concrete reaches a strength sufficient for people to pass through, first install the internal temperature measurement module from the top of the metal protective pipe, then seal the top of the metal protective pipe, and then complete the installation of the external temperature measurement module, main unit, water pump, and water pump controller.

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