Device for monitoring internal temperature response of cement mortar in heat conduction process

Abstract

The utility model provides a device for monitoring internal temperature response of cement mortar in a heat conduction process, which comprises a test container, heat insulation foam and a cement mortar test block are arranged in the container, a plurality of temperature sensors are fixedly arranged in the cement mortar test block, a cylindrical steel pipe is arranged in the center of the test block, and heat conduction liquid is filled in the steel pipe. A heating rod and a temperature sensor are placed in the liquid, the heating rod is connected with a power supply through a relay, the relay is used for controlling starting and stopping of the heating rod, the temperature sensor is connected with a data acquisition card, temperature data are acquired in real time, and the data are transmitted to a computer through the data acquisition card to be analyzed and recorded. The cement mortar temperature monitoring device is simple in structure, convenient to operate and capable of efficiently and accurately monitoring the temperature change in the cement mortar in the heat conduction process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a geotechnical engineering technical field especially relates to a device for monitoring the internal temperature response of cement mortar in the heat conduction process. BACKGROUND

[0002] Cement mortar is widely used as a basic material in construction due to its excellent strength and bonding properties. With the increasing demand for material performance in the construction industry, the thermal conductivity of cement mortar has gradually become the focus of research. Thermal conductivity not only directly affects the energy consumption of buildings, but also closely related to the comfort, cold resistance and thermal insulation of buildings. Therefore, accurate measurement of the thermal conductivity of cement mortar is of great significance for optimizing building materials and engineering design.

[0003] Currently, the testing methods for the thermal conductivity of cement mortar mainly include steady-state method and non-steady-state method. The steady-state method measures the temperature difference between the upper and lower surfaces of the sample and the heat flow through the sample under constant temperature difference, and then calculates the thermal conductivity coefficient. This method is simple to operate, but has some limitations: on the one hand, the steady-state method cannot simulate the complex heat conduction conditions in actual use; on the other hand, the steady-state method only measures the surface temperature and cannot fully reflect the temperature change inside the cement mortar. In contrast, the non-steady-state method records the temperature and time at different time points during the temperature change of the sample and calculates the thermal conductivity coefficient. This method can more realistically simulate the heat conduction process in actual application, but most current testing equipment still places temperature sensors on the surface of the material, which cannot effectively monitor the temperature distribution inside the cement mortar. This results in the existing equipment being unable to fully reflect the thermal conduction characteristics inside the cement mortar, thereby affecting the accuracy and reliability of the experimental results. Therefore, in view of the deficiencies of the prior art, the present patent proposes a device for monitoring the internal temperature response of cement mortar in the heat conduction process. The device can accurately measure the internal temperature of the cement mortar sample during temperature change, thereby more accurately calculating the thermal conductivity of the cement mortar and providing reliable data support for related research and engineering applications. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the above-mentioned shortcomings, and provides a device for monitoring the internal temperature response of cement mortar in the heat conduction process to solve the problems in the background art.

[0005] The utility model adopts the technical scheme of:

[0006] A device for monitoring the internal temperature response of cement mortar in the heat conduction process, comprising a test container, a first heat insulation foam is laid on the bottom wall of the test container, a cement mortar test block is mounted above the first heat insulation foam, a second heat insulation foam is laid above the cement mortar test block,

[0007] A cylindrical steel pipe is arranged at the axial center of the cement mortar test block, and the cylindrical steel pipe is internally provided with a heat-conducting liquid, a heating rod and a first temperature sensor,

[0008] A plurality of second temperature sensors are uniformly embedded outside the cylindrical steel pipe along the radial direction of the inside of the cement mortar test block, and the first temperature sensor and each second temperature sensor are connected in parallel to a data acquisition card through cables.

[0009] The second thermal insulation foam is attached to the inner wall of the top of the test container.

[0010] The test container is a cylindrical plastic container.

[0011] The heating rod is connected to a relay, the relay is connected to a power supply through a power supply line, and the relay is connected to the data acquisition card through the power supply line.

[0012] The power supply is provided with a switch.

[0013] The heat-conducting liquid is water.

[0014] The first temperature sensor and each second temperature sensor have the same vertical distance from the first thermal insulation foam.

[0015] The heating rod and the first temperature sensor are immersed in the heat-conducting liquid.

[0016] The data acquisition card is connected to a computer through a communication interface and a data line.

[0017] Preferably, neither the heating rod nor the temperature sensor contacts the side wall or the bottom wall of the cylindrical steel pipe.

[0018] The utility model has the following beneficial effects:

[0019] 1. The utility model discloses a temperature sensor arranged in the cement mortar test block, and real-time temperature data is collected by combining a data acquisition card, so that the real-time temperature change of the cement mortar in the heat conduction process can be accurately monitored.

[0020] 2. The utility model adopts real-time data feedback by the temperature sensor, accurately controls the start and stop of the heating rod through the relay, ensures the accurate adjustment of the temperature in the cement mortar test block, and guarantees the temperature stability in the experiment process.

[0021] 3. The utility model discloses the feedback control of the relay and the temperature sensor, reduces the artificial intervention, and ensures the accuracy of the test result and the efficiency of the experiment process. DRAWINGS

[0022] Figure 1 It is a vertical sectional view of the test container along the axial center line of the cement mortar test block.

[0023] Figure 2 It is the cross section overhead view of the testing container of the utility model after cutting along the horizontal dotted line A-A.

[0024] Testing container 1, first heat insulation foam 2, second heat insulation foam 201, cement mortar test block 3, cylindrical steel pipe 4, heat conducting liquid 5, heating rod 6, first temperature sensor 7, second temperature sensor 8, relay 9, power supply 10, switch 11, data acquisition card 12, computer 13. DETAILED DESCRIPTION

[0025] It should be understood that the orientation or positional relationship indicated by the terms "upper, upper, top, inner wall" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] Preferably, the heating rod 6 is purchased from Kunshan Xingke Electric Heating Technology Co., Ltd. SC-004 model and its related supporting power supply and circuit.

[0027] Preferably, the relay 9 is purchased from Beijing Juying Electronics Co., Ltd. D01600 model and its related supporting power supply and circuit.

[0028] Preferably, the data acquisition card 12 is purchased from Beijing Altai Technology Development Co., Ltd. DAM-3601 model and its related supporting power supply and circuit.

[0029] Preferably, the first temperature sensor 7 is purchased from Beijing Juying Electronics Co., Ltd. DS18B20 model and its related supporting power supply and circuit. The first temperature sensor 7 and the second temperature sensor 8 are completely the same.

[0030] The heating rod 6, the first temperature sensor 7, the second temperature sensor 8, the relay 9, the switch 11, the data acquisition card 12 and the computer 13 are powered by the power supply 10 or an external power supply.

[0031] Example 1

[0032] As Figure 1 and Figure 2As shown, a device for monitoring the internal temperature response of cement mortar during heat conduction includes a test container 1. A first heat-insulating foam 2 is laid on the bottom wall of the test container 1. A cement mortar test block 3 is mounted on top of the first heat-insulating foam 2. A second heat-insulating foam 201 is laid on top of the cement mortar test block 3. A cylindrical steel pipe 4 is provided at the center of the cement mortar test block 3. A heat-conducting liquid 5, a heating rod 6, and a first temperature sensor 7 are installed inside the cylindrical steel pipe 4. Multiple second temperature sensors 8 are uniformly embedded on the outside of the cylindrical steel pipe 4 along the internal radius of the cement mortar test block 3. The first temperature sensor 7 and each second temperature sensor 8 are connected in parallel to a data acquisition card 12 via cables.

[0033] The second insulating foam 201 is bonded to the top inner wall of the test container 1. The test container 1 is a cylindrical plastic container. The heating rod 6 is connected to the relay 9, which is connected to the power supply 10 via a power cord. The relay 9 is also connected to the data acquisition card 12 via a power cord. The power supply 10 is equipped with a switch 11. The heat-conducting liquid 5 is water.

[0034] The first temperature sensor 7 and each of the second temperature sensors 8 are equidistant from the first insulating foam 2. The heating rod 6 and the first temperature sensor 7 are immersed in the heat-conducting liquid 5. The data acquisition card 12 is connected to the computer 13 via a communication interface and a data cable. Preferably, neither the heating rod 6 nor the first temperature sensor 7 contacts the sidewall or bottom wall of the cylindrical steel pipe 4.

[0035] Example 2

[0036] The operation process of the device described in Example 1 is as follows:

[0037] Step 1: Prepare a cylindrical plastic container with a radius of 100mm and a height of 120mm as test container 1, and lay the first heat insulation foam 2 at the bottom of container 1.

[0038] Step 2: Prepare a cylindrical cement mortar specimen 3 with an outer radius of 100 mm and an inner radius of 20 mm according to the sample mix ratio. During the pouring process, follow... Figure 2 At the indicated location, multiple second temperature sensors 8 are fixed along the radial direction of the cement mortar specimen 3, and these second temperature sensors 8 are connected to the data acquisition card 12. A cylindrical steel pipe 4 is embedded in the center of the cement mortar specimen 3, and a heat-conducting liquid 5 is filled inside the steel pipe 4. Then, a heating rod 6 and a first temperature sensor 7 are placed in the heat-conducting liquid 5, and the first temperature sensor 7 is connected to the data acquisition card 12. The heating rod 6 is connected to the power supply 10 via a relay 9 and then connected to the data acquisition card 12. Finally, a second heat-insulating foam 201 is laid on the cement mortar specimen 3.

[0039] Step 3: Connect the data acquisition card 12 to the computer 13.

[0040] Step 4, open the switch 11 on the power 10 to start the device, the data acquisition card 12 begins to receive and transmit the real-time temperature data feedback by the first temperature sensor 7 in the heat-conducting liquid 5 and the second temperature sensor 8 in the cement mortar test block 3. The relay 9 automatically starts or stops the heating rod 6 according to the data of the data acquisition card 12, controls the temperature of the heat-conducting liquid 5 in the up-and-down process between 25°C to 45°C. In the temperature rising and falling process during the experiment, the data of the second temperature sensor 8 is recorded every 5 minutes, and the temperature data of each position of the cement mortar test block 3 in the heat conduction process is output on the computer 13.

[0041] The above-mentioned embodiment is only a preferred technical solution of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be based on the technical solution recorded in the claims, including the equivalent replacement scheme of the technical features recorded in the claims. That is, the equivalent replacement improvement within this range is also within the protection scope of the present application. The circuit in the electronic component is not improved in the present application, and the model number of the patent is only for convenience of explanation, but is not limited to the use of this instrument model. The parts not described in detail in the present application are prior art.

Claims

1. A device for monitoring the internal temperature response of cement mortar during heat conduction, comprising a test container (1), characterized in that, The bottom wall of the test container (1) is covered with a first heat insulation foam (2), a cement mortar test block (3) is placed on top of the first heat insulation foam (2), and a second heat insulation foam (201) is placed on top of the cement mortar test block (3). A cylindrical steel pipe (4) is provided at the center of the cement mortar test block (3). The cylindrical steel pipe (4) contains a heat-conducting liquid (5), a heating rod (6) and a first temperature sensor (7). Multiple second temperature sensors (8) are uniformly embedded on the outside of the cylindrical steel pipe (4) along the inner radius of the cement mortar test block (3). The first temperature sensor (7) and each second temperature sensor (8) are connected in parallel to the data acquisition card (12) via cables.

2. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The second insulating foam (201) is attached to the top inner wall of the contact test container (1).

3. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The test container (1) is a cylindrical plastic container.

4. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The heating rod (6) is connected to the relay (9), the relay (9) is connected to the power supply (10) via the power cord, and the relay (9) is connected to the data acquisition card (12) via the power cord.

5. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 4, characterized in that, The power supply (10) is equipped with a switch (11).

6. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The heat-conducting liquid (5) is water.

7. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The first temperature sensor (7) and each of the second temperature sensors (8) are at the same vertical distance from the first insulating foam (2).

8. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The heating rod (6) and the first temperature sensor (7) are immersed in the heat-conducting liquid (5).

9. The device for monitoring the internal temperature response of cement mortar during heat conduction according to claim 1, characterized in that, The data acquisition card (12) is connected to the computer (13) via a communication interface and a data cable.

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