Device for testing heat conduction characteristic of thermal barrier material

Abstract

The utility model discloses a thermal barrier material heat conduction characteristic testing device which comprises a test heat transfer tube and two protective heat transfer tubes, a heating tube is arranged in the test heat transfer tube, a first thermal barrier material tube is sleeved on the outer surface of the test heat transfer tube, and the protective heat transfer tubes are respectively arranged at two ends of the test heat transfer tube. A heating pipe is arranged in the protective heat transfer pipe; heat insulation partition plates are arranged at two ends of the protective heat transfer pipe and the test heat transfer pipe; the protective heat transfer pipes are arranged at the two ends of the test heat transfer pipe, and the heating pipes are arranged in the protective heat transfer pipes, so that the internal temperature of the protective heat transfer pipes and the internal temperature of the test heat transfer pipe can be the same; the heat in the test heat transfer tube is prevented from flowing to the protective heat transfer tube, so that the heat in the test heat transfer tube can only be dissipated through the first thermal barrier material tube, and the test accuracy of the thermal barrier material is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal barrier material testing, in particular to a thermal barrier material heat conduction property testing device. Background Art

[0002] Commonly used insulation materials include ultra-fine glass fiber, ultra-fine glass wool, mineral wool, microporous calcium silicate, etc. However, in the special environment of nuclear power plants, when non-metallic insulation materials are used around the reactor, the materials will be radioactively activated and produce radioactive dust; the insulation performance will be reduced after being exposed to nuclear radiation, which will shorten the service life, and a large amount of radioactive solid waste will be generated, which is not easy to handle. Therefore, the insulation of nuclear island equipment in nuclear power plants basically adopts metal reflective insulation structure. Under the same insulation performance requirements, the metal insulation layer is generally heavy, which is not conducive to disassembly, maintenance and replacement. Therefore, the insulation materials for the main steam pipe and the remaining pipes of the conventional island should try to choose thermal barrier materials with low density and high insulation performance. Before the insulation material is put into practical application, it is necessary to test its insulation performance to determine the actual insulation effect of the insulation layer.

[0003] The existing thermal insulation performance test is to wrap the heat source with a thermal barrier material, and set a temperature sensor on the side of the thermal barrier material away from the heat source to measure the thermal insulation performance of the thermal barrier material. For example, Chinese patent publication No. CN219162029U discloses a new type of cement-based thermal insulation material thermal insulation performance test equipment, in which a heating pipe is set inside the detection box, and thermal insulation material is set around the heating pipe. The thermal insulation material is heated by the heating pipe, and the thermometer inside the detection box monitors the temperature change to measure the performance of the thermal insulation material. During the test, although the top and bottom of the space enclosed by the thermal insulation material are closed, heat will still be dissipated through the top box cover and the bottom box, resulting in inaccurate test data of the thermal insulation material.

[0004] In view of this, the existing technology still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a thermal barrier material thermal conductivity property testing device, aiming to solve the problem that during the existing thermal barrier material testing process, heat is dissipated through seals at both ends, resulting in inaccurate test data.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] A thermal barrier material thermal conductivity testing device, comprising:

[0008] A test heat transfer tube; a heating tube is coaxially arranged inside the test heat transfer tube, and a first thermal barrier material tube is coaxially arranged on the outer surface of the test heat transfer tube for testing the thermal conductivity of the thermal barrier material;

[0009] Two protective heat transfer tubes are respectively arranged at the two ends of the test heat transfer tube; a heating tube is arranged inside the protective heat transfer tube; and both ends of the protective heat transfer tube and the test heat transfer tube are provided with insulating baffles.

[0010] Furthermore, a gap is set between the outer surface of the heating tube and the inner surface of the test heat transfer tube, and a gap is set between the inner surface of the first thermal barrier material tube and the outer surface of the heat transfer tube.

[0011] Furthermore, an insulating heat-insulating block is radially arranged on the outer surface of the test heat transfer tube, and the inner surface of the first thermal barrier material tube is in contact with the insulating heat-insulating block.

[0012] Furthermore, a plurality of bridges are radially arranged on both sides of the test heat transfer tube, and a side of the plurality of bridges away from the test heat transfer tube is respectively connected to the side walls of the two protection heat transfer tubes.

[0013] Furthermore, the first thermal barrier material tube includes a first semicircular tube and a second semicircular tube, a plurality of first buckles are respectively provided at both ends of the arc surface of the first semicircular tube, a plurality of first clamping blocks are respectively provided at both ends of the arc surface of the second semicircular tube, and the plurality of first buckles correspond to the plurality of first clamping blocks one by one; the first buckles cooperate with the first clamping blocks so that the first semicircular tube and the second semicircular tube are sleeved on the test heat transfer tube.

[0014] Furthermore, a second thermal barrier material tube is coaxially disposed on the outer surface of the protective heat transfer tube, and an insulating heat insulating block is disposed between the second thermal barrier material tube and the protective heat transfer tube so that a gap is disposed between the second thermal barrier material tube and the protective heat transfer tube.

[0015] Furthermore, a plurality of second buckles are radially arranged at both ends of the first thermal barrier material tube, and a plurality of second clamping blocks are radially arranged at one end of the second thermal barrier material tube close to the first thermal barrier material tube, and the second buckles cooperate with the second clamping blocks.

[0016] Furthermore, a plurality of first thermocouples are provided on the inner surface and the outer surface of the first thermal barrier material tube and the second thermal barrier material tube.

[0017] Furthermore, a plurality of grooves are formed on the outer surfaces of the test heat transfer tube and the protective heat transfer tube, and a second thermocouple is disposed inside the grooves.

[0018] Furthermore, a through hole is provided inside the thermal insulation partition for placing the heating pipe.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the utility model, a heating tube is arranged inside the test heat transfer tube for generating heat, a first thermal barrier material tube is sleeved on the outer surface of the test heat transfer tube for testing the thermal conductivity of the thermal barrier material, protective heat transfer tubes are arranged at both ends of the test heat transfer tube, a heating tube is arranged inside the protective heat transfer tube, and insulating baffles are arranged at both ends of the protective heat transfer tube and the test heat transfer tube; by arranging protective heat transfer tubes at both ends of the test heat transfer tube and arranging heating tubes inside the protective heat transfer tube, the internal temperatures of the protective heat transfer tube and the test heat transfer tube can be made the same, and at the same time, insulating baffles are arranged at both ends of the protective heat transfer tube and the test heat transfer tube to prevent the temperature inside the test heat transfer tube from flowing to the protective heat transfer tube, so that the heat inside the test heat transfer tube can only be dissipated through the first thermal barrier material tube, thereby improving the test accuracy of the thermal barrier material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the structure of the test heat transfer tube and the protective heat transfer tube of the utility model.

[0023] Figure 3 It is a schematic diagram of the bridge structure of the test heat transfer tube of the utility model.

[0024] Figure 4 This is a schematic diagram of the first thermocouple structure of the utility model.

[0025] Figure 5 This is a schematic diagram of the second thermocouple structure of the utility model.

[0026] The numbers in the figure indicate: 1. test heat transfer tube; 2. heating tube; 3. first thermal barrier material tube; 4. protective heat transfer tube; 5. insulation baffle; 6. insulation block; 7. second thermal barrier material tube; 8. first thermocouple; 9. second thermocouple; 10. support. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In view of the shortcomings of the prior art, this embodiment provides a thermal barrier material thermal conductivity property testing device, which can be specifically described as follows:

[0031] As attached Figure 1 As shown, a thermal barrier material heat conduction characteristic testing device includes a test heat transfer tube 1 and two protective heat transfer tubes 4. Both the test heat transfer tube 1 and the protective heat transfer tube 4 are cylindrical structures. A heating tube 2 is arranged inside the test heat transfer tube 1 to generate heat inside the test heat transfer tube 1. A first thermal barrier material tube 3 is sleeved on the outer surface of the test heat transfer tube 1 to test the thermal conductivity of the thermal barrier material. Protective heat transfer tubes 4 are respectively arranged at both ends of the test heat transfer tube 1. A heating tube 2 is arranged inside the protective heat transfer tube 4 to provide heat to the inside of the protective heat transfer tube 4. Insulating baffles 5 are respectively arranged at both ends of the protective heat transfer tube 4 and the test heat transfer tube 1 to prevent heat convection between the protective heat transfer tube 4 and the test heat transfer tube 1 to avoid affecting the test data.

[0032] By arranging protective heat transfer tubes 4 at both ends of the test heat transfer tube 1 and arranging heating tubes 2 inside the protective heat transfer tube 4, the temperature inside the protective heat transfer tube 4 and the test heat transfer tube 1 can be made the same. Meanwhile, insulating baffles 5 are arranged at both ends of the protective heat transfer tube 4 and the test heat transfer tube 1 to prevent the temperature inside the test heat transfer tube 1 from flowing to the protective heat transfer tube 4, so that the heat inside the test heat transfer tube 1 can only be dissipated through the first thermal barrier material tube 3, thereby improving the test accuracy of the thermal barrier material.

[0033] In one embodiment of the present application, the heating tube 2 inside the protective heat transfer tube 4 is a single-end heating tube 2, and a connecting wire is led out from each end of the test device to connect to an external power supply device. The heating tube 2 inside the test heat transfer tube 1 is a double-end heating tube 2, and a connecting wire is led out from each end, and is connected to an external power supply device through an insulating partition 5 and the inside of the protective heat transfer tube 4.

[0034] As attached Figure 1 As shown, the outer surface of the heating tube 2 is spaced apart from the inner surface of the test heat transfer tube 1, and the inner surface of the first thermal barrier material tube 3 is spaced apart from the outer surface of the test heat transfer tube 1. Through the spacing, the heat generated by the heating tube 2 is transferred to the inside of the test heat transfer tube 1 through the air medium in the gap, and at the same time, the heat inside the test heat transfer tube 1 is transferred to the inside of the first thermal barrier material tube 3 through the air medium in the gap, and then passes through the first thermal barrier material tube 3 to be transferred to the outside. Through the air gap setting, the test heat transfer tube 1 and the first thermal barrier material tube 3 can be heated evenly, thereby improving the stability and accuracy of the test.

[0035] In one embodiment of the present application, a through hole is opened inside the insulating baffle 5, and the through hole is coaxially arranged with the test heat transfer tube 1 and the protective heat transfer tube 4. The heating tube 2 located inside the test heat transfer tube 1 and the protective heat transfer tube 4 is arranged in the corresponding through hole of the insulating baffle 5, so that the heating tube 2 is coaxially arranged with the test heat transfer tube 1 or the protective heat transfer tube 4, that is, a gap is set between the heating tube 2 and the test heat transfer tube 1 or the protective heat transfer tube 4 to ensure uniform heat transfer.

[0036] In one embodiment of the present application, a plurality of insulating blocks 6 are radially arranged on the outer surface of the test heat transfer tube 1, and the inner surface of the first thermal barrier material tube 3 is in contact with the surface of the insulating blocks 6; through the insulating blocks 6, the outer surface of the test heat transfer tube 1 and the inner surface of the first thermal barrier material tube 3 are spaced apart, so that the first thermal barrier material tube 3 is evenly heated, which is convenient for testing the thermal conductivity of the thermal barrier material.

[0037] In this application, an embodiment is shown in the attached Figure 2 and attached Figure 3As shown, both the test heat transfer tube 1 and the protective heat transfer tube 4 are carbon steel tubes. A plurality of bridges are radially arranged on both sides of the test heat transfer tube 1. The sides of the plurality of bridges away from the test heat transfer tube 1 are respectively connected to the side walls of the two protective heat transfer tubes 4, so that the test heat transfer tube 1 and the two protective heat transfer tubes 4 are fixed, thereby facilitating the placement of the test device; the bridges are fixed to the side walls of the test heat transfer tube 1 and the protective heat transfer tube 4 by welding.

[0038] Furthermore, the insulating baffle 5 on the side of the protective heat transfer tube 4 close to the test heat transfer tube 1 is located at the position of the bridge frame, which is used to block the gap between the test heat transfer tube 1 and the protective heat transfer tube 4 to prevent the heat inside the test heat transfer tube 1 from being lost through the gap.

[0039] In this embodiment, as shown in the attached Figure 2 and attached Figure 3 As shown, the test heat transfer tube 1 and the protection heat transfer tube 4 can be a carbon steel tube, which is cut into three sections, namely the test heat transfer tube 1 and the two protection heat transfer tubes 4; specifically, three notches are radially cut on the cross section of the carbon steel tube, and no cutting is performed between two adjacent notches, so that the test heat transfer tube 1 is partially connected to the protection heat transfer tubes 4 on both sides, and the connection width between the two notches is small enough to prevent the heat inside the test heat transfer tube 1 from being transferred to the heat inside the protection heat transfer tube 4 through the connection position.

[0040] Furthermore, the insulating partition 5 inside the protective heat transfer tube 4 close to the test heat transfer tube 1 is located at the cut notch position, which is not only used to isolate the heat inside the protective heat transfer tube 4, but also used to block the notch to prevent heat from dissipating through the notch and affecting the test results.

[0041] In one embodiment of the present application, the first thermal barrier material tube 3 includes a first semicircular tube and a second semicircular tube, the first semicircular tube and the second semicircular tube cooperate with each other to form the first thermal barrier material tube 3, and the first thermal barrier material tube 3 is divided into two parts for easy installation; a plurality of first buckles are respectively arranged at both ends of the arc surface of the first semicircular tube, the first buckles are located at a position where the arc surface of the first semicircular tube is close to the cross section of the first semicircular tube, and the first buckles at both ends of the arc surface are symmetrical to each other, and a plurality of first clamping blocks are respectively arranged at both ends of the arc surface of the second semicircular tube, the first clamping blocks are located at a position where the arc surface of the first semicircular tube is close to the cross section of the first semicircular tube, and the first clamping blocks at both ends of the arc surface are symmetrical to each other; the first buckle corresponds to the first clamping block one by one, the first buckle on the first semicircular tube cooperates with the first clamping block on the second semicircular tube, so that the first semicircular tube and the second semicircular tube form the first thermal barrier material tube 3, and are sleeved on the test heat transfer tube 1.

[0042] As attached Figure 1As shown, the outer surface of the protective heat transfer tube 4 is coaxially provided with a second thermal barrier material tube 7. Both the first thermal barrier material tube 3 and the second thermal barrier material tube 7 are made of thermal barrier material. An insulating heat block 6 is provided between the second thermal barrier material tube 7 and the protective heat transfer tube 4. Through the function of the insulating heat block 6, a gap is set between the second thermal barrier material tube 7 and the protective heat transfer tube 4, so that the shell of the second thermal barrier material tube 7 is evenly heated. The second thermal barrier material tube 7 is provided to prevent the protective heat transfer tube 4 from dissipating heat too quickly, resulting in the heat inside the protective heat transfer tube 4 being lower than that inside the test heat transfer tube 1, thereby causing the heat inside the test heat transfer tube 1 to be convectively dissipated to the inside of the protective heat transfer tube 4. At the same time, the test results of the second thermal barrier material tube 7 are compared with the test results of the first thermal barrier material tube 3, so that the test results are more rigorous.

[0043] In one embodiment of the present application, multiple second buckles are radially arranged at both ends of the first thermal barrier material tube 3, the arrangement direction of the second buckles is perpendicular to the arrangement direction of the first buckles, and the second buckles are located on the outer surface of the first thermal barrier material tube 3. Multiple second clamps are radially arranged on one end of the second thermal barrier material tube 7 close to the first thermal barrier material tube 3, and the second clamps are located on the outer surface of the second thermal barrier material tube 7. The second buckles cooperate with the second clamps to make the first thermal barrier material tube 3 cooperate with the second thermal barrier material tube 7, while ensuring that there is no gap between the first thermal barrier material tube 3 and the second thermal barrier material tube 7 to prevent heat loss.

[0044] In this application, an embodiment is shown in the attached Figure 4 As shown, a plurality of first thermocouples 8 are arranged on the inner and outer surfaces of the first thermal barrier material tube 3 and the second thermal barrier material tube 7. The plurality of first thermocouples 8 are evenly distributed on the inner and outer surfaces of the first thermal barrier material tube 3 and the second thermal barrier material tube 7. Through the detection of the first thermocouples 8, the time from the start of heating until the inner and outer surface temperatures of the thermal barrier material tend to be the same can be determined, and the thermal conduction efficiency of the thermal barrier material can be calculated based on the amount of heating.

[0045] In this embodiment, a plurality of first thermocouples 8 are welded on the inner and outer surfaces of the first thermal barrier material tube 3 and the second thermal barrier material tube 7 by means of surface resistance welding.

[0046] In this application, an embodiment is shown in the attached Figure 2 and attached Figure 5 As shown, multiple grooves are formed on the outer surfaces of the test heat transfer tube 1 and the protective heat transfer tube 4, and the multiple grooves are evenly arranged on the outer surfaces of the test heat transfer tube 1 and the protective heat transfer tube 4. Second thermocouples 9 are arranged inside the grooves and welded by a butt welding machine. The second thermocouple 9 is used to measure the temperature change of the outer surfaces of the test heat transfer tube 1 and the protective heat transfer tube 4, which is used for calculating the test results, etc.

[0047] In this embodiment, third thermocouples are provided on both sides of the bridge of the protection heat transfer tube 4 and the test heat transfer tube 1, and the temperature change and heat dissipation at both ends of the protection heat transfer tube 4 and the test heat transfer tube 1 are monitored by the third thermocouples.

[0048] In one embodiment of the present application, the thermal barrier material thermal conductivity property testing device further includes two supports 10, which are respectively located at one end of the two protective heat transfer tubes 4 away from the test heat transfer tube 1, and insulating blocks 6 are provided at the positions where the supports 10 contact the protective heat transfer tubes 4 to prevent heat loss inside the protective heat transfer tubes 4.

[0049] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

Claims

1. A thermal barrier material thermal conductivity testing device, characterized in that: include: Test heat transfer tubes; A heating tube is coaxially arranged inside the test heat transfer tube, and a first thermal barrier material tube is coaxially arranged on the outer surface of the test heat transfer tube for testing the thermal conductivity of the thermal barrier material; Two protective heat transfer tubes are respectively arranged at the two ends of the test heat transfer tube; a heating tube is arranged inside the protective heat transfer tube; and both ends of the protective heat transfer tube and the test heat transfer tube are provided with insulating baffles.

2. A thermal barrier material thermal conductivity testing device according to claim 1, characterized in that: A gap is set between the outer surface of the heating tube and the inner surface of the test heat transfer tube, and a gap is set between the inner surface of the first thermal barrier material tube and the outer surface of the heat transfer tube.

3. A thermal barrier material thermal conductivity testing device according to claim 2, characterized in that: The outer surface of the test heat transfer tube is radially provided with insulating blocks, and the inner surface of the first thermal barrier material tube is in contact with the insulating blocks.

4. A thermal barrier material thermal conductivity testing device according to claim 1, characterized in that: A plurality of bridge frames are radially arranged on both sides of the test heat transfer tube, and the sides of the plurality of bridge frames away from the test heat transfer tube are respectively connected to the side walls of the two protection heat transfer tubes.

5. The thermal barrier material thermal conductivity testing device according to claim 1, characterized in that: The first thermal barrier material tube comprises a first semicircular tube and a second semicircular tube, a plurality of first buckles are respectively arranged at both ends of the arc surface of the first semicircular tube, a plurality of first clamping blocks are respectively arranged at both ends of the arc surface of the second semicircular tube, and the plurality of first buckles correspond to the plurality of first clamping blocks one by one; the first buckles cooperate with the first clamping blocks so that the first semicircular tube and the second semicircular tube are sleeved on the test heat transfer tube.

6. A thermal barrier material thermal conductivity testing device according to claim 5, characterized in that: A second thermal barrier material tube is coaxially disposed on the outer surface of the protective heat transfer tube, and an insulating heat insulating block is disposed between the second thermal barrier material tube and the protective heat transfer tube so that a gap is set between the second thermal barrier material tube and the protective heat transfer tube.

7. A thermal barrier material thermal conductivity testing device according to claim 6, characterized in that: A plurality of second buckles are radially arranged at both ends of the first thermal barrier material tube, and a plurality of second clamping blocks are radially arranged at one end of the second thermal barrier material tube close to the first thermal barrier material tube, and the second buckles match the second clamping blocks.

8. A thermal barrier material thermal conductivity testing device according to claim 6, characterized in that: A plurality of first thermocouples are arranged on the inner surface and the outer surface of the first thermal barrier material tube and the second thermal barrier material tube.

9. The thermal barrier material thermal conductivity testing device according to claim 1, characterized in that: A plurality of grooves are formed on the outer surfaces of the test heat transfer tube and the protective heat transfer tube, and a second thermocouple is disposed inside the grooves.

10. The thermal barrier material thermal conductivity testing device according to claim 1, characterized in that: A through hole is provided inside the heat-insulating baffle for placing the heating pipe.

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