A large-volume concrete temperature monitoring device and monitoring method

Abstract

The present application relates to a large-volume concrete temperature monitoring device and a monitoring method, belonging to the technical field of large-volume concrete temperature monitoring. It includes: embedded steel bars; installation pipes arranged parallel to the embedded steel bars, with both ends of the installation pipes being closed structures, a plurality of installation pipes are arranged vertically, temperature measurement grooves are opened on the outer side wall of the installation pipes, and heat conduction sealing plates are covered at the openings of the temperature measurement grooves; a monitoring component, including a temperature sensor and a controller, a plurality of temperature sensors are provided and correspond to the installation pipes one by one, the temperature sensors are located in the corresponding installation pipes and are used for temperature monitoring of the concrete, and the controller is used for receiving the acquisition information of the temperature sensors; an electric control component for providing electrical energy for the temperature sensors; a transmission component, a plurality of transmission components are provided and correspond to the installation pipes one by one, and the transmission component periodically controls the working state of the temperature sensor based on the change of the concrete temperature. The present application can improve the cost of concrete temperature monitoring.

Description

Technical Field

[0001] This application relates to the technical field of mass concrete temperature monitoring, and in particular to a mass concrete temperature monitoring device and a monitoring method. Background Art

[0002] With the continuous improvement of the complexity of building structures, the volume of concrete projects is also increasing. After the mass concrete is poured, a large amount of heat released by the hydration of cement will cause the temperature inside the concrete to rise. The surface of the concrete dissipates heat quickly, but the mass concrete structure is thick and its own thermal conductivity is poor. The heat generated by the hydration of cement accumulates inside the structure and is not easy to dissipate, resulting in a large temperature difference between the inside and outside of the concrete and generating temperature stress inside the mass. When the temperature stress is large enough, temperature cracks penetrating the entire interface will occur, causing significant damage to the structure and seriously affecting the safety of the engineering structure.

[0003] Therefore, it is necessary to cooperate with temperature measuring elements in the construction of mass concrete for effective temperature monitoring to timely understand the temperature change inside the mass concrete. The existing temperature measuring elements are to arrange temperature sensors on site for concrete temperature monitoring. However, due to the large volume of concrete, a large number of temperature sensors are required, and the construction time of concrete is long, resulting in a long service time of the temperature sensors, and thus a large energy consumption for concrete temperature monitoring. Summary of the Invention

[0004] In order to improve the cost of concrete temperature monitoring, this application provides a mass concrete temperature monitoring device and a monitoring method.

[0005] In a first aspect, this application provides a mass concrete temperature monitoring device, adopting the following technical solution:

[0006] A mass concrete temperature monitoring device includes embedded steel bars; mounting pipes, which are arranged on the embedded steel bars and are parallel to the embedded steel bars. Both ends of the mounting pipes are closed structures. A plurality of mounting pipes are arranged in the vertical direction. Temperature measuring grooves communicating with the inside of the mounting pipes are opened on the outer side walls of the mounting pipes, and heat-conducting sealing plates are covered at the openings of the temperature measuring grooves; a monitoring assembly, including a temperature sensor and a controller. A plurality of temperature sensors are provided and correspond to the mounting pipes one by one. The temperature sensors are located inside the corresponding mounting pipes and monitor the temperature of the concrete through the heat-conducting sealing plates. The controller is used to receive the acquisition information of the temperature sensors; an electric control assembly, which is used to provide electrical energy for the temperature sensors; a transmission assembly, which is provided in a plurality and corresponds to the mounting pipes one by one. The transmission assembly periodically controls the working state of the temperature sensors based on the temperature change of the concrete.

[0007] By adopting the above technical solution, the transmission assembly preliminarily monitors the temperature of the concrete by itself. When the transmission assembly detects that the temperature change value of the concrete reaches the preset value, the transmission assembly drives the temperature sensor to be in the working state, and the temperature sensor precisely monitors the temperature of the concrete periodically, avoiding the temperature sensor being always in the working state, thereby improving the monitoring cost of the concrete temperature.

[0008] Optionally, the electric control assembly includes: an external power supply and an electric control unit. There are several electric control units, and they are in one-to-one correspondence with the installation pipes and the temperature sensors respectively; the electric control unit includes: a power connection board, fixedly arranged in the corresponding installation pipe and electrically connected to the external power supply; a conductive board, slidably arranged in the corresponding installation pipe and used to abut against the power connection board to transmit electric energy, and the conductive board is electrically connected to the corresponding temperature sensor.

[0009] By adopting the above technical solution, the transmission assembly drives the power connection board to move based on the temperature change of the concrete. When the power connection board abuts against the conductive board, the power connection board transmits electric energy to the temperature sensor through the conductive board, making the temperature sensor in the startup working state; when there is a distance between the power connection board and the conductive board, the temperature sensor is in the power-off and closed state.

[0010] Optionally, a delay assembly is arranged on the installation pipe. The delay assembly includes a delay magnet arranged on the conductive board; the transmission assembly includes: a transmission telescopic rod, arranged vertically and perpendicular to the sliding direction of the power connection board. The fixed end of the transmission telescopic rod is rotatably arranged in the installation pipe, and the rotation axis is vertically arranged. A driving assembly for driving the transmission telescopic rod to rotate is arranged in the installation pipe; a first magnet, fixedly arranged on the fixed end of the transmission telescopic rod and used to drive the delay magnet to approach the conductive board; a second magnet, fixedly arranged on the fixed end of the transmission telescopic rod and used to drive the delay magnet to move away from the conductive board.

[0011] By adopting the above technical solution, when the temperature of the concrete is in a gradually decreasing state, during the process of the temperature of the concrete decreasing, the driving assembly drives the transmission telescopic rod to rotate in a single direction. During the rotation of the transmission telescopic rod, the first magnet and the second magnet can successively generate magnetic force on the delay magnet. When the first magnet and the delay magnet are arranged opposite to each other, there is a repulsive force between the first magnet and the delay magnet, making the delay magnet drive the conductive board to move towards the direction close to the power connection board, so that the power connection board and the conductive board can abut; when the second magnet and the delay magnet are arranged opposite to each other, there is an attractive force between the second magnet and the delay magnet, making the power connection board and the conductive board separate.

[0012] Optionally, a transmission groove is formed on the inner side wall of the installation pipe. The transmission groove is spirally arranged in the vertical direction. The driving assembly includes: a slider slidably arranged in the transmission groove along the length direction of the transmission groove; a driving telescopic rod vertically arranged in the installation pipe and located below the transmission telescopic rod. The fixed end of the driving telescopic rod is fixedly connected to the installation pipe, and a gas is preset in the rodless cavity of the fixed end of the driving telescopic rod; a spring is arranged in the rod cavity of the fixed end of the driving telescopic rod and is always in a compressed state; a driving plate is coaxially arranged in the installation pipe and located between the driving telescopic rod and the transmission rod. The driving plate is coaxially arranged with the driving telescopic rod and is rotatably connected to the driving telescopic rod. The driving plate is fixedly connected to the movable end of the driving telescopic rod and is fixedly connected to the slider.

[0013] By adopting the above technical solution, during the process of the temperature of the concrete gradually decreasing, the gas in the rodless cavity of the fixed end of the driving telescopic rod gradually contracts with the decrease of the temperature, so that the driving telescopic rod gradually shortens under the action of the spring and the gas;

[0014] During the process of the driving telescopic rod gradually shortening, it drives the driving plate and the slider to move downward, so that the slider slides in the transmission groove and drives the transmission telescopic rod to rotate unidirectionally, so that the first magnet and the second magnet can sequentially apply magnetic force to the delay magnet.

[0015] Optionally, the delay assembly further includes a delay telescopic rod. The length direction of the delay telescopic rod is the same as the sliding direction of the power connection plate, and the delay telescopic rod is located between the transmission telescopic rod and the power connection plate. The fixed end of the delay telescopic rod is on the side close to the power connection plate of itself and is damping-connected to the installation pipe; the delay magnet is fixedly connected to the movable end of the delay telescopic rod.

[0016] By adopting the above technical solution, the setting of the delay telescopic rod prolongs the contact time between the power connection plate and the conductive plate, thereby prolonging the working time of the temperature sensor and facilitating the temperature sensor to collect multiple groups of temperature information of the concrete.

[0017] Optionally, the temperature sensor abuts against the heat-conducting sealing plate and is fixedly connected to the driving plate.

[0018] By adopting the above technical solution, the driving plate drives the temperature sensor to move during the movement process, so that the temperature sensor can perform mobile temperature acquisition and expands the detection range of the temperature sensor.

[0019] Optionally, the driving assembly further includes an elastic airbag arranged in the rodless cavity of the fixed end of the driving telescopic rod, and the gas is located in the elastic airbag.

[0020] By adopting the above technical solution, when the gas is directly placed in the rodless cavity driving the fixed end of the telescopic rod, there may be a risk of gas leakage. The elastic airbag provides a closed storage space for the gas, avoiding the possibility of gas leakage.

[0021] In a second aspect, the present application provides a method for monitoring the temperature of mass concrete, adopting the following technical solution:

[0022] A method for monitoring the temperature of mass concrete includes the following steps:

[0023] Step 1: Determine the number of installation pipes according to the specifications of the mass concrete to be monitored, and bury several installation pipes into the preset depth in sequence;

[0024] Step 2: Start pouring the mass concrete;

[0025] Step 3: After the mass concrete is poured, connect the external power supply to the power connection board; the temperature sensor performs periodic temperature monitoring on the concrete. If it is found that the temperature difference between the inside and outside of the concrete exceeds the specification requirements, a warning message is sent to the controller.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up the monitoring component, the electric control component and the transmission component, the transmission component itself conducts preliminary monitoring on the temperature of the concrete. When the transmission component monitors that the temperature change value of the concrete reaches the preset value, the transmission component drives the temperature sensor to be in the working state, and the temperature sensor realizes periodic and accurate monitoring of the temperature of the concrete, avoiding the temperature sensor being in the working state all the time, thereby improving the monitoring cost of the concrete temperature;

[0028] 2. By setting up the driving plate and the temperature sensor, the driving plate drives the temperature sensor to move during the movement process, enabling the temperature sensor to perform mobile temperature acquisition and expanding the detection range of the temperature sensor. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0030] Figure 2 is a cross-sectional view of an embodiment of the present application;

[0031] Figure 3 is Figure 2 a partial enlarged view of part A in

[0032] Figure 4 is Figure 2 a partial enlarged view of part B in

[0033] Description of the Reference Numerals:

[0034] 1. Embedded steel bars;

[0035] 2. Installation pipe; 21. Temperature measurement groove; 22. Transmission groove; 23. Heat conduction sealing plate;

[0036] 3. Monitoring component; 31. Temperature sensor; 32. Controller;

[0037] 4. Electric control component;

[0038] 41. External power supply;

[0039] 42. Electric control part; 421. Power connection board; 422. Conductive plate; 423. First wire; 424. Second wire;

[0040] 5. Transmission component; 51. Transmission telescopic rod; 52. First magnet; 53. Second magnet;

[0041] 6. Delay component; 61. Delay magnet; 62. Delay telescopic rod;

[0042] 7. Driving component; 71. Slide block; 72. Driving telescopic rod; 73. Spring; 74. Driving plate; 75. Elastic airbag. Detailed implementation manners

[0043] The following further elaborates on this application in conjunction with the attached Figures 1-4 to provide a more detailed description of this application.

[0044] The embodiment of this application discloses a large - volume concrete temperature monitoring device. Referring to Figure 1 and Figure 2 , a large - volume concrete temperature monitoring device includes embedded steel bars 1. Referring to Figure 1 and Figure 3 , it further includes an installation pipe 2 which is vertically arranged and fixedly connected to the embedded steel bars 1, a monitoring component 3 for detecting the temperature of the concrete, and an electric control component 4. A plurality of installation pipes 2 are arranged along the vertical direction, and both ends of the installation pipe 2 are closed structures; the monitoring component 3 includes a controller 32 and a plurality of temperature sensors 31 corresponding to the installation pipes 2 one by one. The temperature sensors 31 are arranged in the corresponding installation pipes 2 and are electrically connected to the controller 32; the electric control component 4 is used to provide working electric energy for the temperature sensors 31.

[0045] When monitoring the temperature of the concrete, the electric control component 4 supplies power to the temperature sensors 31, enabling the temperature sensors 31 to be in a working state and collect the temperature information of the concrete. The temperature sensors 31 convert the temperature information of the concrete into corresponding temperature signals and transmit them to the controller 32, facilitating external staff to know the temperature situation of the concrete through the controller 32.

[0046] Referring toFigure 3 and Figure 4 The installation pipe 2 itself is made of heat-insulating material to avoid heat transfer between adjacent installation pipes 2. A temperature measuring groove 21 communicating with the inside of the installation pipe 2 is provided on the outer side wall of the installation pipe 2, and the cross section of the temperature measuring groove 21 is in an annular shape; a heat-conducting sealing plate 23 is covered at the notch of the temperature measuring groove 21, and the heat-conducting sealing plate 23 is used to transfer the heat of the concrete to the inside of the installation pipe 2.

[0047] Referring to Figure 3 and Figure 4 The temperature measuring end of the temperature sensor 31 abuts against the heat-conducting sealing plate 23, which is convenient for the temperature sensor 31 to collect the temperature information of the concrete; the electric control component 4 includes an external power supply 41 and an electric control part 42. Among them, a plurality of electric control parts 42 are provided and are in one-to-one correspondence with the installation pipe 2 and the temperature sensor 31 respectively.

[0048] Referring to Figure 3 and Figure 4 The electric control part 42 includes a conductive plate 422, a power connection plate 421, a first wire 423 and a second wire 424. Among them, the conductive plate is slidably arranged in the installation pipe 2 along the horizontal direction and is located above the temperature measuring groove 21; the power connection plate 421 is arranged opposite to the conductive plate 422, and the conductive plate 422 is used to abut against the power connection plate 421 to transfer electric energy. During the sliding process of the conductive plate 422, the power connection plate 421 can abut against the conductive plate 422; one end of the first wire 423 is connected to the power connection plate 421, and the other end is connected to the external power supply 41; one end of the second wire 424 is connected to the conductive plate 422, and the other end is connected to the corresponding temperature sensor 31.

[0049] The power connection plate 421 is electrically connected to the external power supply 41 through the first wire 423; the conductive plate 422 is electrically connected to the temperature sensor 31 through the second wire 424; when the power connection plate 421 abuts against the conductive plate 422, electric energy is sequentially transferred to the temperature sensor 31 through the first wire 423, the power connection plate 421, the conductive plate 422 and the second wire 424, so that the temperature sensor 31 is in a monitoring working state; when the power connection plate 421 is separated from the conductive plate 422, the temperature sensor 31 loses the power supply and is in a power-off and closed state.

[0050] Referring to Figure 3 and Figure 4 A transmission component 5 and a delay component 6 are arranged on the installation pipe 2. The delay component 6 is connected to the power connection plate 421. The delay component 6 is used to extend the abutting time between the power connection plate 421 and the conductive plate 422, which is convenient for the temperature sensor 31 to collect multiple groups of temperature information of the concrete; the transmission component 5 drives the delay component 6 and the power connection plate 421 to move periodically in a reciprocating manner.

[0051] Referring to Figure 3 and Figure 4, the delay component 6 is located within the corresponding mounting tube 2 and above the temperature measurement groove 21. The delay component 6 includes a delay magnet 61 and a delay telescopic rod 62. Among them, the delay telescopic rod 62 is arranged parallel to the sliding direction of the power connection board 421 and is located on the side of the power connection board 421 away from the conductive board 422; the fixed end of the delay telescopic rod 62 is located on the side of itself close to the power connection board 421. The fixed end of the delay telescopic rod 62 is slidably connected to the mounting tube 2, and the sliding direction is parallel to the sliding direction of the power connection board 421; the fixed end of the delay telescopic rod 62 is damping-connected to the mounting tube 2.

[0052] Referring to Figure 3 and Figure 4 , the delay magnet 61 is fixedly arranged on the movable end of the delay telescopic rod 62 and is located on the side of the delay telescopic rod 62 away from the power connection board 421.

[0053] Referring to Figure 3 and Figure 4 , the transmission component 5 includes a transmission telescopic rod 51, a first magnet 52, and a second magnet 53. Among them, the transmission telescopic rod 51 is coaxially arranged within the mounting tube 2 and is located on the side of the delay magnet 61 away from the delay telescopic rod 62. The fixed end of the rotating telescopic rod is rotatably connected to the mounting tube 2, and the rotation axis is vertically arranged; the first magnet 52 is located on one side of the fixed end of the transmission telescopic rod 51. During the rotation of the transmission telescopic rod 51, the first magnet 52 can be arranged opposite to the delay magnet 61. The first magnet 52 is fixedly connected to the fixed end of the transmission telescopic rod 51, and there is a repulsive force between the first magnet 52 and the delay magnet 61; the second magnet 53 is located on one side of the fixed end of the transmission telescopic rod 51. During the rotation of the transmission telescopic rod 51, the second magnet 53 can be arranged opposite to the delay magnet 61. The second magnet 53 is fixedly connected to the fixed end of the transmission telescopic rod 51, and there is an attractive force between the second magnet 53 and the delay magnet 61.

[0054] Referring to Figure 3 and Figure 4 , a transmission groove 22 is formed on the inner side wall of the mounting tube 2. The transmission groove 22 is arranged in a spiral shape in the vertical direction and is located above the temperature measurement groove 21; a driving component 7 is arranged on the mounting tube 2. The driving component 7 includes a slider 71, a driving telescopic rod 72, a driving plate 74, a spring 73, and an elastic airbag 75. Among them, the slider 71 is slidably arranged in the transmission groove 22 along the length direction of the transmission groove 22. Specifically, in order to facilitate the sliding of the slider 71, the slider 71 can be spherical.

[0055] Referring to Figure 3 and Figure 4, the driving board 74 is coaxially arranged inside the installation pipe 2 and is located below the transmission telescopic rod 51, and the driving board 74 is fixedly connected to the slider 71; the temperature sensor 31 is fixedly connected to the driving board 74; to avoid the second wire 424 from being wound inside the installation pipe 2, an electrical slip ring can be installed at the center of the driving board 74 to avoid the second wire 424 from being wound. It should be noted that the electrical slip ring is a prior art and will not be further described in this embodiment.

[0056] Refer to Figure 3 and Figure 4 , the driving telescopic rod 72 is vertically arranged inside the installation pipe 2 and is located below the transmission telescopic rod 51. The fixed end of the driving telescopic rod 72 is fixedly connected to the installation pipe 2, and the movable end of the driving telescopic rod 72 is rotationally connected to the driving board 74 around its own axis; the movable end of the driving telescopic rod 72 divides the interior of the fixed end of the driving telescopic rod 72 into a rod chamber and a rodless chamber.

[0057] Refer to Figure 3 and Figure 4 , the spring 73 is vertically arranged inside the rod chamber, and both ends of the spring 73 are fixedly connected to the fixed end and the movable end of the driving telescopic rod 72 respectively. The spring 73 is always in a compressed state; the elastic airbag 75 is arranged inside the rodless chamber, and a gas is preset inside the elastic airbag 75.

[0058] During the concrete pouring process, the temperature of the concrete is at the initial highest temperature. Therefore, the gas inside the elastic airbag 75 can support the driving telescopic rod 72 to be at the maximum length.

[0059] The implementation principle of the large-volume concrete temperature monitoring device in the embodiment of the present application is as follows: after the concrete is poured, the temperature of the concrete is in a gradually decreasing process, so that the gas inside the elastic airbag 75 is in a gradually shrinking state due to the influence of temperature, and under the action of the spring 73, the driving telescopic rod 72 is in a shrinking state.

[0060] During the shrinking process of the driving telescopic rod 72, the movable end of the driving telescopic rod 72 drives the driving board 74 and the slider 71 downward, so that the slider 71 rotates in the transmission groove 22 and drives the driving board 74 to rotate; during the movement of the driving board 74, the driving board 74 drives the temperature sensor 31 to move, so that the temperature information acquisition range of the temperature sensor 31 is expanded, which is beneficial for the constructor to know the temperature condition inside the concrete.

[0061] During the rotation of the driving board 74, the driving board 74 drives the transmission telescopic rod 51 to rotate. The rotating telescopic rod drives the first magnet 52 and the second magnet 53 to rotate, so that the first magnet 52 and the second magnet 53 apply magnetic force to the delay magnet 61 in turn, thereby realizing the reciprocating movement of the conductive plate 422.

[0062] During the movement of the conductive plate 422, since there is a damping connection between the fixed end of the delay telescopic rod 62 and the mounting tube 2; when the first magnet 52 exerts a magnetic force on the delay magnet 61, the delay telescopic rod 62 is first in the shortest state under the magnetic force, and then the whole approaches the power connection plate 421; when the second magnet 53 exerts a magnetic force on the delay magnet 61, the delay telescopic rod 62 changes from the shortest state to the longest state under the magnetic force, and then the whole moves away from the power connection plate 421, thereby prolonging the contact time between the power connection plate 421 and the conductive plate 422, and thus prolonging the working time of the temperature sensor 31.

[0063] A method for monitoring the temperature of mass concrete includes the following steps:

[0064] Step 1: Determine the number of mounting tubes 2 according to the specifications of the mass concrete to be monitored, and bury several mounting tubes 2 into the preset depth in sequence;

[0065] Step 2: Start pouring the mass concrete;

[0066] Step 3: After the mass concrete is poured, connect the external power supply 41 to the power connection plate 421; the temperature sensor 31 performs periodic temperature monitoring on the concrete. If it is found that the temperature difference between the inside and outside of the concrete exceeds the specification requirements, a warning message is sent to the controller 32.

[0067] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A large-volume concrete temperature monitoring device, characterized in that, Including: Embedded steel bars (1); Installation pipes (2), arranged on the embedded steel bars (1) and parallel to the embedded steel bars (1). Both ends of the installation pipes (2) are closed structures. A number of installation pipes (2) are arranged vertically. Temperature measurement grooves (21) communicating with the inside of the installation pipes (2) are formed on the outer side walls of the installation pipes (2). Heat-conducting sealing plates (23) are covered at the openings of the temperature measurement grooves (21); Monitoring components (3), including temperature sensors (31) and controllers (32). A number of temperature sensors (31) are provided and correspond to the installation pipes (2) one by one. The temperature sensors (31) are located in the corresponding installation pipes (2) and monitor the temperature of the concrete through the heat-conducting sealing plates (23). The controllers (32) are used to receive the acquisition information of the temperature sensors (31); Electric control components (4), used to supply electrical energy to the temperature sensors (31); Driving components (5), a number of which are provided and correspond to the installation pipes (2) one by one. The driving components (5) periodically control the working states of the temperature sensors (31) based on the temperature change of the concrete; The electric control components (4) include: an external power supply (41) and electric control parts (42). A number of electric control parts (42) are provided and correspond to the installation pipes (2) and the temperature sensors (31) one by one; The electric control parts (42) include: Power connection plates (421), fixedly arranged in the corresponding installation pipes (2) and electrically connected to the external power supply (41); Conductive plates (422), slidably arranged in the corresponding installation pipes (2) and used to abut against the power connection plates (421) to transfer electrical energy. The conductive plates (422) are electrically connected to the corresponding temperature sensors (31); A delay component (6) is arranged on the installation pipes (2). The delay component (6) includes a delay magnet (61) arranged on the conductive plate (422); The driving components (5) include: Driving telescopic rods (51), arranged vertically and perpendicular to the sliding direction of the power connection plates (421). The fixed ends of the driving telescopic rods (51) are rotatably arranged in the installation pipes (2), and the rotation axes are arranged vertically. A driving component (7) for driving the driving telescopic rods (51) to rotate is arranged in the installation pipes (2); First magnets (52), fixedly arranged on the fixed ends of the driving telescopic rods (51) and used to drive the delay magnets (61) to approach the conductive plates (422); Second magnets (53), fixedly arranged on the fixed ends of the driving telescopic rods (51) and used to drive the delay magnets (61) to move away from the conductive plates (422); A driving groove (22) is formed on the inner side wall of the installation pipe (2). The driving groove (22) is arranged in a spiral shape vertically. The driving component (7) includes: Sliders (71), slidably arranged in the driving groove (22) along the length direction of the temperature measurement groove (21); Driving telescopic rods (72), arranged vertically in the installation pipes (2) and located below the driving telescopic rods (51). The fixed ends of the driving telescopic rods (72) are fixedly connected to the installation pipes (2). A gas is preset in the rodless cavity of the fixed ends of the driving telescopic rods (72); A spring (73) is arranged in the rod chamber at the fixed end of the driving telescopic rod (72) and is always in a compressed state; A driving plate (74) is coaxially arranged in the mounting tube (2) and is located between the driving telescopic rod (72) and the transmission rod. The driving plate (74) is coaxially arranged with the driving telescopic rod (72) and is rotationally connected to the driving telescopic rod (72). The driving plate (74) is fixedly connected to the movable end of the transmission telescopic rod (51) and is fixedly connected to the slider (71); The driving assembly (7) further includes an elastic airbag (75) arranged in the rodless chamber at the fixed end of the driving telescopic rod (72), and the gas is located inside the elastic airbag (75); When the temperature of the concrete gradually decreases, the gas in the elastic airbag (75) gradually contracts under the influence of temperature, and the spring (73) makes the driving telescopic rod (72) in a contracted state; The temperature sensor (31) abuts against the heat-conducting sealing plate (23) and is fixedly connected to the driving plate (74).

2. The large-volume concrete temperature monitoring device according to claim 1, characterized in that: The delay assembly (6) further includes a delay telescopic rod (62). The length direction of the delay telescopic rod (62) is the same as the sliding direction of the power connection plate (421), and the delay telescopic rod (62) is located between the transmission telescopic rod (51) and the power connection plate (421). The fixed end of the delay telescopic rod (62) is on the side close to the power connection plate (421). The fixed end of the delay telescopic rod (62) is slidably connected to the mounting tube (2) and is damping-connected to the mounting tube (2); The delay magnet (61) is fixedly connected to the movable end of the delay telescopic rod (62).

3. A method for monitoring the temperature of mass concrete, based on the mass concrete temperature monitoring device described in claim 2, characterized in that, It includes the following steps: Step 1: According to the specifications of the mass concrete to be monitored, determine the number of mounting tubes (2), and bury several mounting tubes (2) into the preset depth in sequence; Step 2: Start pouring the mass concrete; Step 3: After the mass concrete is poured, connect the external power supply (41) to the power connection plate (421); The temperature sensor (31) performs periodic temperature monitoring on the concrete. If it is found that the temperature difference between the inside and outside of the concrete exceeds the specification requirements, a warning message is sent to the controller (32).

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