Clay heat conductivity coefficient testing device

Abstract

The utility model relates to a clay heat conductivity coefficient testing device which comprises a first temperature control water area device and a second temperature control water area device, the first constant-temperature box is communicated with the first temperature control water area device, the second constant-temperature box is communicated with the second temperature control water area device, and the first constant-temperature box and the second constant-temperature box are arranged at the two ends of the shell respectively; the soil body layer, the paraffin layer and the automatic lifting mechanism are arranged on the shell and connected with the paraffin layer; the locking assembly is arranged on the shell, and after the first constant-temperature box, the soil body layer, the paraffin layer and the second constant-temperature box are sequentially installed in the shell from top to bottom, the locking assembly locks the first constant-temperature box, the soil body layer, the paraffin layer and the second constant-temperature box into the shell; after the locking assembly is released, the automatic lifting mechanism lifts the first constant-temperature box, the soil body layer and the paraffin layer. The device is simple in structure, and the to-be-tested sample can be rapidly replaced.

Description

Technical Field

[0001] The present application belongs to the technical field of clay thermal conductivity testing, and specifically relates to a clay thermal conductivity testing device. Background Art

[0002] Thermal conductivity refers to the amount of heat transferred through an area of ​​1 square meter within 1 second when the temperature difference between the two surfaces of a 1 meter thick material is 1 degree (K, ℃) under stable heat transfer conditions. The unit is watt / meter·degree (W / (m·K), K here can be replaced by ℃).

[0003] There are some thermal conductivity test devices in the prior art, such as the Chinese patent with publication number CN211741137U, which discloses a semi-infinite space frozen clay thermal conductivity test device, including a first low-temperature water supply water area device, a second low-temperature water supply water area device, an inner thermostatic box, a soil body, and an outer thermostatic box, wherein the first low-temperature water supply water area device is connected to the outer thermostatic box, and the second low-temperature water supply water area device is connected to the inner thermostatic box, and the ring-shaped structural design is used to simulate the traditional infinite plane to realize the test of the thermal conductivity of clay. However, since the thermal conductivity test of clay needs to replace different soil bodies, the structural setting of the test device in the prior art (such as the above patent) does not facilitate the replacement of the structure of the sample to be tested, and the sample to be tested cannot be quickly replaced, which brings inconvenience to the test and the test efficiency is low. In order to solve this technical problem, the present application provides a clay thermal conductivity test device. Utility Model Content

[0004] In view of the above analysis, the embodiment of the utility model aims to provide a clay thermal conductivity testing device to solve the above problems existing in the prior art.

[0005] The purpose of the utility model is achieved in this way:

[0006] A clay thermal conductivity testing device, comprising

[0007] a first temperature-controlled water area device and a second temperature-controlled water area device;

[0008] A first thermostatic box and a second thermostatic box, wherein the first thermostatic box is connected to the first temperature-controlled water area device, and the second thermostatic box is connected to the second temperature-controlled water area device, and the first thermostatic box and the second thermostatic box are respectively arranged at two ends of the housing;

[0009] A soil layer, disposed in the shell;

[0010] A paraffin layer, disposed in the housing;

[0011] An automatic lifting mechanism, arranged on the housing and connected to the paraffin layer;

[0012] A locking assembly is arranged on the shell, and when the first thermostatic box, the soil layer, the paraffin layer and the second thermostatic box are installed in the shell from top to bottom in sequence, the locking assembly locks the four into the shell;

[0013] When the locking assembly is released, the automatic lifting mechanism lifts the first constant temperature box, the soil layer, and the paraffin layer;

[0014] Wherein, temperature measuring thermocouples are arranged on the opposite side and the opposite side of the soil layer and the paraffin layer.

[0015] Preferably, the first temperature-controlled water area device includes a first temperature-controlled water area, the second temperature-controlled water area device includes a second temperature-controlled water area, the first temperature-controlled water area and the second temperature-controlled water area are both installed with electric heating wires, one of the first temperature-controlled water area device and the second temperature-controlled water area device includes a water delivery system, the water delivery system includes a solenoid valve, a condenser, and a variable frequency compressor, the output end of the variable frequency compressor is sequentially connected in series with the condenser and the solenoid valve through a pipeline and connected to the first temperature-controlled water area, and then connected from the first temperature-controlled water area to the second temperature-controlled water area through a pipeline, and then connected to the input end of the variable frequency compressor through a pipeline.

[0016] Preferably, the output end of the first temperature-controlled water area is connected to the water inlet of the first constant temperature box through a spiral water pipe, and the input end is connected to the water outlet of the first constant temperature box through a spiral water pipe. The output end of the second temperature-controlled water area is connected to the water inlet of the second constant temperature box through a spiral water pipe, and the input end is connected to the water outlet of the second constant temperature box through a spiral water pipe.

[0017] Preferably, the automatic lifting mechanism comprises:

[0018] An inner sleeve, wherein the bottom of the inner sleeve further comprises a step extending radially outward, the step being connected to the inner wall surface of the shell, the inner sleeve being arranged in the shell, and an installation space being formed between the inner sleeve and the shell;

[0019] an elastic member, one end of which is disposed on the step and is located in the installation space;

[0020] A bearing member is connected to the other end of the elastic member and extends into the inner sleeve through a lifting groove opened on the side wall of the inner sleeve. The bearing member is located above the second constant temperature box and abuts against the bottom of the paraffin layer. The lifting groove extends to both ends of the inner sleeve.

[0021] Preferably, it also includes a first limiting ring and a second limiting ring, the first limiting ring and the second limiting ring are respectively arranged in the installation space, and are respectively arranged at positions close to the two ends of the inner sleeve, the first limiting ring and the second limiting ring are both connected to the shell, the bearing member is located between the first limiting ring and the second limiting ring, and the first limiting ring and the second limiting ring block the bearing member.

[0022] Preferably, a telescopic cover is provided in the lifting groove, and the telescopic cover is respectively located at the upper and lower parts of the bearing member, and the two ends of the lifting groove are respectively located outside the range between the first limiting ring and the second limiting ring.

[0023] Preferably, the locking assembly includes a wrapping tube, a bracket, a connector, and a plug-in box. The wrapping tube is connected to the bottom of the first constant temperature box, the wrapping tube abuts against the first limiting ring, the side wall of the wrapping tube is hollow, the bracket is connected to the hollow part of the side wall of the wrapping tube, the connector is connected to the bracket, the plug-in box is connected to the first limiting ring, an opening is provided on the side of the plug-in box, and the connector can be moved circumferentially along the first limiting ring and plugged into the plug-in box through the opening.

[0024] Preferably, the inner wall of the connector box and the outer wall of the connector are both connected with rubber pads.

[0025] Preferably, a reflective arrow is provided in front of the opening of the plug-in box, the reflective arrow points to the opening, and the reflective arrow is connected to the first limiting ring.

[0026] Preferably, the second thermostat is installed in the shell through the bottom of the shell. After the paraffin layer is installed in the shell, the paraffin layer abuts against the second thermostat and is connected to the automatic lifting mechanism. The automatic lifting mechanism can lift the paraffin layer upward.

[0027] Compared with the prior art, the clay thermal conductivity testing device provided by the utility model can achieve at least one of the following beneficial effects:

[0028] 1. Through the provided locking assembly and automatic lifting mechanism, when the first thermostatic box, the soil layer, the paraffin layer and the second thermostatic box are sequentially installed in the shell from top to bottom, the locking assembly is used to lock the four into the shell, so that the temperatures of the first thermostatic box and the second thermostatic box are changed respectively by the first temperature-controlled water area device and the second temperature-controlled water area device, and then the thermal conductivity of the clay in the soil layer is measured based on the temperature measuring thermocouples arranged in the soil layer and the paraffin layer; when the soil layer and the paraffin layer need to be replaced, the locking assembly is released, and the automatic lifting mechanism lifts the first thermostatic box, the soil layer and the paraffin layer, so that the first thermostatic box, the soil layer and the paraffin layer can be lifted to the top of the shell, and the disassembly is completed, so that it is convenient to take out and replace the samples to be tested, thereby improving the experimental efficiency.

[0029] 2. Use one compressor, save energy and easy installation;

[0030] 3. Both temperature-controlled water areas are equipped with electric heating wires to achieve rapid temperature adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0032] Figure 1 A schematic diagram of the structure of a clay thermal conductivity testing device provided by the utility model;

[0033] Figure 2 A schematic diagram of the first angle structure of the automatic lifting mechanism and the locking assembly provided by the utility model;

[0034] Figure 3 A second angle structural schematic diagram of the automatic lifting mechanism and the locking assembly provided by the utility model;

[0035] Figure 4 This is a structural schematic diagram of the locking assembly provided by the utility model.

[0036] Reference numerals:

[0037] 1. Solenoid valve; 2. Condenser; 3. Variable frequency compressor; 4. First temperature-controlled water area; 5. Second temperature-controlled water area; 6. First water pump; 7. First constant temperature box; 8. Second constant temperature box; 9. Soil layer; 10. Paraffin layer; 11. Spiral water pipe; 12. Second water pump; 13. Heating wire;

[0038] 14. Automatic lifting mechanism; 141. Inner sleeve; 142. Elastic member; 143. Bearing member; 144. Lifting groove; 145. First limiting ring; 146. Second limiting ring; 147. Telescopic cover; 148. Spring;

[0039] 15. Locking assembly; 151. Wrapping tube; 152. Rubber pad; 153. Connector; 154. Connector box; 155. Reflective arrow;

[0040] 16. Temperature measuring thermocouple; 17. Shell. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] In the accompanying drawings, the size and relative size of components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, a specific process sequence may be performed in a different order than described. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the order described. In addition, the same reference numerals represent the same components.

[0043] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "(the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups are not excluded from existence or addition. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0044] A specific embodiment of the utility model is as follows Figures 1 to 4 As shown, a clay thermal conductivity testing device comprises:

[0045] a first temperature-controlled water area device and a second temperature-controlled water area device;

[0046] A first thermostatic box 7 and a second thermostatic box 8, wherein the first thermostatic box 7 is connected to the first temperature-controlled water area device, and the second thermostatic box 8 is connected to the second temperature-controlled water area device, and the first thermostatic box 7 and the second thermostatic box 8 are respectively arranged at two ends of the housing 17;

[0047] The soil layer 9, i.e., the clay layer, is disposed in the housing 17 as a sample to be tested;

[0048] The paraffin layer 10 is arranged in the housing 17;

[0049] An automatic lifting mechanism 14 is disposed on the housing 17 and connected to the paraffin layer 10;

[0050] The locking assembly 15 is arranged on the housing 17. When the first thermostatic box 7, the soil layer 9, the paraffin layer 10 and the second thermostatic box 8 are sequentially installed in the housing 17 from top to bottom, the locking assembly 15 locks the four into the housing 17.

[0051] When the locking assembly 15 is released, the automatic lifting mechanism 14 lifts the first constant temperature box 7, the soil layer 9, and the paraffin layer 10;

[0052] Wherein, temperature measuring thermocouples 16 are arranged on the opposite side and the opposite side of the soil layer 9 and the paraffin layer 10 .

[0053] Compared with the prior art, the clay thermal conductivity testing device provided in the present embodiment, through the provided locking assembly 15 and the automatic lifting mechanism 14, when the first thermostatic box 7, the soil layer 9, the paraffin layer 10 and the second thermostatic box 8 are sequentially installed in the shell 17 from top to bottom, the locking assembly 15 is used to lock the four into the shell 17, so that the temperatures of the first thermostatic box 7 and the second thermostatic box 8 are respectively controlled by the first temperature-controlled water area device and the second temperature-controlled water area device, and then the clay thermal conductivity of the soil layer 9 is measured based on the temperature measuring thermocouples 16 provided in the soil layer 9 and the paraffin layer 10; when the soil layer 9 and the paraffin layer 10 need to be replaced, the locking assembly 15 is released, and the automatic lifting mechanism 14 lifts the first thermostatic box 7, the soil layer 9 and the paraffin layer 10, so that the first thermostatic box 7, the soil layer 9 and the paraffin layer 10 can be lifted to the top of the shell 17, and the disassembly is completed, so as to facilitate the removal and replacement of the sample to be tested.

[0054] Specifically, the second thermostat 8 is installed in the shell 17 through the bottom of the shell 17. After the paraffin layer 10 is installed in the shell 17, the paraffin layer 10 abuts against the second thermostat 8 and is connected to the automatic lifting mechanism 14. The automatic lifting mechanism 14 can lift the paraffin layer 10 upward.

[0055] The second thermostat 8 is first installed into the shell 17 through the bottom of the shell 17, and then after the paraffin layer 10 is installed into the shell 17, the paraffin layer 10 abuts against the second thermostat 8 and is connected to the automatic lifting mechanism 14. Then the soil layer 9 is installed, and the soil layer 9 contacts the paraffin layer 10, and finally the first thermostat 7 is installed. After such arrangement, the automatic lifting mechanism 14 lifts the paraffin layer 10 and the soil layer 9 for easy replacement. Since the first thermostat 7 is arranged in the outermost layer, the first thermostat 7 is easy to take out. After the first thermostat 7 is taken out, the soil layer 9 and the paraffin layer 10 are ejected sequentially by the automatic lifting mechanism 14.

[0056] In some embodiments, the first temperature-controlled water area device includes a first temperature-controlled water area 4, and the second temperature-controlled water area device includes a second temperature-controlled water area 5. Both the first temperature-controlled water area 4 and the second temperature-controlled water area 5 are equipped with electric heating wires 13. Both temperature-controlled water areas are equipped with electric heating wires, which can achieve rapid temperature adjustment; one of the first temperature-controlled water area device and the second temperature-controlled water area device includes a water supply system, and the water supply system includes an electromagnetic valve 1, a condenser 2, and a variable frequency compressor 3. The output end of the variable frequency compressor 3 is connected in series with the condenser 2 and the electromagnetic valve 1 through pipelines in sequence and connected to the first temperature-controlled water area 4, and then connected from the first temperature-controlled water area 4 to the second temperature-controlled water area 5 through pipelines, and then connected to the input end of the variable frequency compressor 3 through pipelines.

[0057] In this embodiment, by providing a variable frequency compressor 3 for driving, precise control can also be achieved, which can reduce equipment costs.

[0058] After the variable frequency compressor 3 is started, the refrigerant can be driven to pass through the condenser 2 and the solenoid valve 1 to flow into the first temperature-controlled water area 4, then flow through the second temperature-controlled water area 5, and then be connected to the input end of the variable frequency compressor 3 through a pipeline. The refrigerant can be water.

[0059] At the same time, the output end of the first temperature-controlled water area 4 is connected to the water inlet of the first thermostatic tank 7 through the spiral water pipe 11, and the input end is connected to the water outlet of the first thermostatic tank 7 through the spiral water pipe 11. The output end of the second temperature-controlled water area 5 is connected to the water inlet of the second thermostatic tank 8 through the spiral water pipe 11, and the input end is connected to the water outlet of the second thermostatic tank 8 through the spiral water pipe 11. The water of the first thermostatic tank 7 is pumped by the first water pump 6, and the water of the second thermostatic tank 8 is pumped by the second water pump 12.

[0060] Through the above settings, the temperatures of the first thermostatic box 7 and the second thermostatic box 8 are controlled. Different temperatures can be provided to the first thermostatic box 7 and the second thermostatic box 8 according to experimental needs. Then, the temperature is transferred through the heat conduction of the paraffin layer 10 and the soil layer 9. After measurement by the temperature measuring thermocouple, the thermal conductivity data of the clay in the experiment is obtained. By using a spiral water pipe to connect the temperature-controlled water area and the thermostatic box, the temperature change generated during the transfer process is reduced, making the measurement result more accurate.

[0061] Optionally, 4 layers of temperature measuring thermocouples are provided inside the soil layer and the paraffin layer (2 on each side and 2 in the middle), which can accurately measure the temperature of each point and transmit it to the computer in real time through the data collector, reducing the error of the experimental data.

[0062] Optionally, the water inlet of the thermostatic box is installed at the lower part of the box body, and the water outlet is installed at the upper part of the box body, which is conducive to the water staying fully inside the box body.

[0063] In some embodiments, the automatic lifting mechanism 14 includes:

[0064] The inner sleeve 141 has a bottom portion which further includes a step extending radially outward, the step being connected to the inner wall surface of the housing 17, the inner sleeve 141 being disposed in the housing 17, and an installation space being formed between the inner sleeve 141 and the housing 17;

[0065] An elastic member 142, one end of which is disposed on the step and is located in the installation space;

[0066] The supporting member 143 is connected to the other end of the elastic member 142 and extends into the inner sleeve 141 through a lifting groove 144 opened on the side wall of the inner sleeve 141. The supporting member 143 is located above the second constant temperature box 8 and abuts against the bottom of the paraffin layer 10. The lifting groove 144 extends to both ends of the inner sleeve 141.

[0067] The elastic member 142 includes a plurality of springs 148, and the plurality of springs 148 are evenly arranged along the circumference of the inner sleeve 141. The plurality of springs 148 are provided so that the elastic member 142 can provide better lifting force and lift stably.

[0068] When the paraffin layer 10 is installed into the inner sleeve 141, the paraffin layer 10 presses the supporting member 143 to move downward, that is, moves toward the second constant temperature box 8, and the elastic member 142 is compressed. After the soil layer 9 and the first constant temperature box 7 are installed, the first constant temperature box 7 is locked by the locking assembly 15, so that the paraffin layer 10, the soil layer 9 and the first constant temperature box 7 are fixed. After the first constant temperature box 7 is unlocked, the elastic member 142 lifts the paraffin layer 10, the soil layer 9 and the first constant temperature box 7.

[0069] The portion of the bearing member 143 located in the lifting groove 144 is narrower than the portion of the bearing member 143 outside the lifting groove 144. One end of the bearing member 143 is located in the inner sleeve 141, used to carry the wax layer 10, the soil layer 9 and the first constant temperature box 7, and the other part is located in the installation space and connected to the elastic member 142. In this way, the lifting groove 144 can be made narrower, and the soil layer 9 is not easy to leak into the installation space.

[0070] Furthermore, a telescopic cover 147 is provided in the lifting groove 144, and the telescopic cover 147 is respectively located at the upper and lower parts of the bearing member 143, and the two ends of the lifting groove 144 are respectively located outside the range between the first limiting ring 145 and the second limiting ring 146. The lifting groove 144 can be closed by providing the telescopic cover 147.

[0071] In some embodiments, a first limiting ring 145 and a second limiting ring 146 are also included. The first limiting ring 145 and the second limiting ring 146 are respectively arranged in the installation space and are respectively arranged at positions close to the two ends of the inner sleeve 141. The first limiting ring 145 and the second limiting ring 146 are both connected to the shell 17, and the supporting member 143 is located between the first limiting ring 145 and the second limiting ring 146. The first limiting ring 145 and the second limiting ring 146 block the supporting member 143.

[0072] After the first limiting ring 145 and the second limiting ring 146 are provided, the bearing member 143 can only move within the range between the first limiting ring 145 and the second limiting ring 146. Beyond this range, the first limiting ring 145 and the second limiting ring 146 block the bearing member 143. In this way, on the one hand, the elastic member 142 can be prevented from being overly compressed and damaged. On the other hand, a good range of movement can be provided for the movement of the telescopic cover 147, and the two ends of the telescopic cover 147 are not overly compressed.

[0073] In some embodiments, the locking assembly 15 includes a wrapping tube 151, a bracket, a connector 153, and a plug-in box 154. The wrapping tube 151 is connected to the bottom of the first constant temperature box 7, the wrapping tube 151 abuts against the first limiting ring 145, the side wall of the wrapping tube 151 is hollow, the bracket is connected to the hollow part of the side wall of the wrapping tube 151, the connector 153 is connected to the bracket, the plug-in box 154 is connected to the first limiting ring 145, and an opening is provided on the side of the plug-in box 154. The connector 153 can move circumferentially along the first limiting ring 145 and be plugged into the plug-in box 154 through the opening.

[0074] When installing the first thermostatic box 7, align the wrapping tube 151 with the first limiting ring 145, move it downward to abut against the first limiting ring 145, and then rotate the first thermostatic box 7 so that the connector 153 and the connector box 154 are plugged together. In this way, the first thermostatic box 7 cannot move in the up and down directions, and a locking effect is produced.

[0075] The first thermostatic box 7, the second thermostatic box 8, and the shell 17 are all cylindrical structures.

[0076] The inner wall of the plug box 154 and the outer wall of the plug connector 153 are both connected with rubber pads 152. The rubber pads 152 are provided to increase the friction force after the plug box 154 and the plug connector 153 are plugged together, and the plug box 154 and the plug connector 153 are not easy to be separated from the circumferential direction of the first limiting ring 145 after being plugged together.

[0077] A reflective arrow 155 is provided in front of the opening of the plug box 154, the reflective arrow 155 points to the opening, and the reflective arrow 155 is connected to the first limiting ring 145. The reflective arrow 155 can be provided to facilitate the auxiliary position calibration of the docking of the plug box 154 and the plug connector 153.

[0078] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A clay thermal conductivity testing device, characterized in that: include: a first temperature-controlled water area device and a second temperature-controlled water area device; A first thermostatic box and a second thermostatic box, wherein the first thermostatic box is connected to the first temperature-controlled water area device, and the second thermostatic box is connected to the second temperature-controlled water area device, and the first thermostatic box and the second thermostatic box are respectively arranged at two ends of the housing; A soil layer, disposed in the shell; A paraffin layer, disposed in the housing; An automatic lifting mechanism, arranged on the housing and connected to the paraffin layer; A locking assembly is arranged on the shell, and when the first thermostatic box, the soil layer, the paraffin layer and the second thermostatic box are installed in the shell from top to bottom in sequence, the locking assembly locks the four into the shell; When the locking assembly is released, the automatic lifting mechanism lifts the first constant temperature box, the soil layer, and the paraffin layer; Wherein, temperature measuring thermocouples are arranged on the opposite side and the opposite side of the soil layer and the paraffin layer.

2. The clay thermal conductivity testing device according to claim 1, characterized in that: The first temperature-controlled water area device includes a first temperature-controlled water area, the second temperature-controlled water area device includes a second temperature-controlled water area, the first temperature-controlled water area and the second temperature-controlled water area are both installed with electric heating wires, one of the first temperature-controlled water area device and the second temperature-controlled water area device includes a water delivery system, the water delivery system includes a solenoid valve, a condenser, and a variable frequency compressor, the output end of the variable frequency compressor is sequentially connected to the condenser and the solenoid valve through a pipeline and connected to the first temperature-controlled water area, and then connected from the first temperature-controlled water area to the second temperature-controlled water area through a pipeline, and then connected to the input end of the variable frequency compressor through a pipeline.

3. The clay thermal conductivity testing device according to claim 2, characterized in that: The output end of the first temperature-controlled water area is connected to the water inlet of the first constant temperature box through a spiral water pipe, and the input end is connected to the water outlet of the first constant temperature box through a spiral water pipe. The output end of the second temperature-controlled water area is connected to the water inlet of the second constant temperature box through a spiral water pipe, and the input end is connected to the water outlet of the second constant temperature box through a spiral water pipe.

4. The clay thermal conductivity testing device according to claim 1, characterized in that: The automatic lifting mechanism comprises: An inner sleeve, wherein the bottom of the inner sleeve further comprises a step extending radially outward, the step being connected to the inner wall surface of the shell, the inner sleeve being arranged in the shell, and an installation space being formed between the inner sleeve and the shell; an elastic member, one end of which is disposed on the step and is located in the installation space; A bearing member is connected to the other end of the elastic member and extends into the inner sleeve through a lifting groove opened on the side wall of the inner sleeve. The bearing member is located above the second constant temperature box and abuts against the bottom of the paraffin layer. The lifting groove extends to both ends of the inner sleeve.

5. The clay thermal conductivity testing device according to claim 4, characterized in that: It also includes a first limiting ring and a second limiting ring, which are respectively arranged in the installation space and respectively arranged at positions close to the two ends of the inner sleeve, and the first limiting ring and the second limiting ring are both connected to the shell, and the bearing member is located between the first limiting ring and the second limiting ring, and the first limiting ring and the second limiting ring block the bearing member.

6. The clay thermal conductivity testing device according to claim 5, characterized in that: A telescopic cover is arranged in the lifting groove, and the telescopic cover is respectively located at the upper and lower parts of the bearing member, and the two ends of the lifting groove are respectively located outside the range between the first limiting ring and the second limiting ring.

7. The clay thermal conductivity testing device according to claim 5, characterized in that: The locking assembly includes a wrapping tube, a bracket, a connector, and a plug-in box. The wrapping tube is connected to the bottom of the first constant temperature box, the wrapping tube abuts against the first limiting ring, the side wall of the wrapping tube is hollow, the bracket is connected to the hollow part of the side wall of the wrapping tube, the connector is connected to the bracket, the plug-in box is connected to the first limiting ring, an opening is provided on the side of the plug-in box, and the connector can be moved circumferentially along the first limiting ring and plugged into the plug-in box through the opening.

8. The clay thermal conductivity testing device according to claim 7, characterized in that: The inner wall of the plug-in box and the outer wall of the plug-in connector are both connected with rubber pads.

9. The clay thermal conductivity testing device according to claim 7, characterized in that: A reflective arrow is arranged in front of the opening of the plug-in box, the reflective arrow points to the opening, and the reflective arrow is connected to the first limiting ring.

10. The clay thermal conductivity testing device according to any one of claims 1 to 9, characterized in that: The second thermostatic box is installed in the shell through the bottom of the shell. After the paraffin layer is installed in the shell, the paraffin layer abuts against the second thermostatic box and is connected to the automatic lifting mechanism. The automatic lifting mechanism can lift the paraffin layer upward.

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