Testing tool for evaluating thermal diffusivity of high polymer material
By designing a test tool built on common tools and materials in ordinary laboratories, the existing thermal diffusion capacity evaluation equipment is solved, and the rapid and accurate evaluation of the thermal diffusion capacity of polymer materials is achieved, and the technological development and industrialization of thermal conductive polymer composite materials is promoted.
Patent Information
- Application Number
- CN202420617603.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing thermal diffusion capacity evaluation equipment of polymer materials is expensive, complex in structure, and the data results are obtained for a long time, so equipment suitable for ordinary laboratories is relatively inefficient.
A test tool built on common tools and materials in ordinary laboratories is designed, including fixed glands, temperature monitoring units, heating units, substrates and fasteners, for rapid and accurate evaluation of the thermal diffusion ability of polymer materials.
It has achieved rapid and accurate evaluation of the thermal diffusion ability of polymer materials, low cost and simple structure, suitable for research on the field of thermally conductive polymer materials at the enterprise end, and promoted the technological development and industrialization of thermally conductive polymer composite materials.
Smart Images
Figure CN222671727U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of evaluating the thermal diffusion capacity of polymer materials, and in particular to a testing tool for evaluating the thermal diffusion capacity of polymer materials. Background Art
[0002] Polymer materials are widely used in aerospace, traditional industries, electronic information and other fields due to their light weight, good insulation and corrosion resistance. With the development of technology, related fields have new requirements for the thermal conductivity of polymer materials. For example, in the traditional industrial field, the use of heat exchangers lined with polymer materials can avoid problems such as flue gas corrosion, and further improving their thermal conductivity can effectively save production costs; in the field of electronic information, polymer materials are used in electronic packaging, integrated circuits, etc. Improving thermal conductivity can optimize the heat dissipation performance of related equipment and speed up the operation rate. However, due to the weak intrinsic thermal conductivity of polymer materials, the above application expansion is limited. Therefore, the preparation of high thermal conductivity polymer materials is of great significance to solving the heat dissipation problem in related industrial fields, and how to quickly evaluate the thermal diffusion capacity is a key step.
[0003] However, existing equipment for evaluating the thermal diffusion capacity of polymer materials is often expensive and complex in structure, and it takes a long time to obtain data results, so its adaptability to ordinary laboratories is still relatively low. Utility Model Content
[0004] In response to the above technical problems, the present application provides a test tool for evaluating the thermal diffusion capacity of polymer materials. It is built based on common instruments and materials in ordinary laboratories. It can quickly and accurately evaluate the thermal diffusion capacity of various polymer materials, thereby accelerating the research process of thermal conductivity functionalization of polymer materials. It has low cost, simple structure and strong scalability.
[0005] To achieve the above-mentioned purpose, the present application proposes a test tool for evaluating the thermal diffusion capacity of polymer materials, comprising: a fixed pressure cover, a temperature monitoring unit, a heating unit, a substrate and a fastener, wherein the fixed pressure cover is used to sequentially cover the temperature monitoring unit and the heating unit on the substrate in the height direction, and the fastener is used to fix the fixed pressure cover on the substrate so that the two surfaces of the workpiece to be inspected located between the temperature monitoring unit and the heating unit are respectively in contact with the temperature monitoring unit and the heating unit, and the temperature monitoring unit is used to obtain surface temperature change data of the workpiece to be inspected located on the heating unit in operation.
[0006] Optionally, the test fixture further includes a buffer layer, which is sandwiched between the fixed pressure cover and the temperature monitoring unit, and is used to protect the heating unit and the temperature monitoring unit when the fastener fixes the fixed pressure cover on the substrate.
[0007] Optionally, the heating unit includes a temperature control module and a heating module, and the temperature control module is used to increase the temperature of the heating module to a preset target temperature.
[0008] Optionally, the temperature monitoring unit includes a thermocouple and a data receiving module, and the data receiving module is used to receive surface temperature change data sent by the thermocouple laid on the surface of the workpiece to be detected.
[0009] Optionally, the thermocouple is provided in plurality, and the data receiving module is used to receive surface temperature change data sent by the plurality of thermocouples distributed in an array and laid on the surface of the workpiece to be inspected.
[0010] Optionally, the fixed gland is a "J" shaped structure.
[0011] Optionally, the fixed pressure cover includes a supporting portion and a pressing portion protruding from the supporting portion in the height direction, the pressing portion is used to press the temperature monitoring unit and the heating unit onto the substrate in sequence in the height direction, and the supporting portion is used for the fastener to fix the temperature monitoring unit and the heating unit onto the substrate when the pressing portion presses the temperature monitoring unit and the heating unit.
[0012] Optionally, a positioning groove is provided on the substrate, and the heating unit is arranged in the positioning groove.
[0013] Optionally, the substrate is provided with through grooves on two opposite sides of the positioning groove, the support portion is provided with a through hole, and the fastener passes through the through groove and the through hole to fix the fixed pressure cover on the substrate.
[0014] Optionally, the fastener includes a bolt and a nut, and the bolt passes through the through slot and the through hole in sequence, or passes through the through hole and the through slot in sequence and then is connected to the nut.
[0015] The present application proposes a test fixture constructed based on common instruments and materials in ordinary laboratories. It has the characteristics of low cost and simple structure, and can quickly and accurately evaluate the thermal diffusion capacity of various polymer materials. It is especially suitable for enterprises to conduct research in the field of thermal conductive polymer materials, and can effectively promote the technical development and industrialization of thermal conductive polymer composite materials, and accelerate the process of thermal conductive material preparation from theory to application. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A schematic diagram of the three-dimensional structure of a test tool provided in an embodiment of the present application;
[0018] Figure 2 Schematic diagram of the explosion structure of the test tool provided in one embodiment of the present application Figure 1 ;
[0019] Figure 3 Schematic diagram of the explosion structure of the test tool provided in one embodiment of the present application Figure 2 ;
[0020] Figure 4 A schematic diagram of the top structure of a test tool provided in one embodiment of the present application. DETAILED DESCRIPTION
[0021] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0023] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0024] Furthermore, the terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, rather than to indicate or imply relative importance or a particular order.
[0025] In addition, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion in addition to the listed elements and may also include additional elements not expressly listed.
[0026] Please refer to Figure 1 , Figure 1 A schematic diagram of the three-dimensional structure of a test fixture for evaluating the thermal diffusion capacity of a polymer material is shown. The test fixture includes: a fixed pressure cover 10, a temperature monitoring unit (not shown in the figure), a heating unit 30, a substrate 40 and a fastener 50. The fixed pressure cover 10 is used to sequentially cover the temperature monitoring unit (not shown in the figure) and the heating unit 30 on the substrate 40 in the height direction. The fastener 50 is used to fix the fixed pressure cover 10 on the substrate 40 so that the two surfaces of the workpiece 90 to be tested located between the temperature monitoring unit (not shown in the figure) and the heating unit 30 are respectively in contact with the temperature monitoring unit (not shown in the figure) and the heating unit 30. The temperature monitoring unit (not shown in the figure) is used to obtain surface temperature change data of the workpiece 90 to be tested located on the working heating unit 30. Specifically, in this embodiment, the heating unit 30 is arranged on the surface of the substrate 40, the lower surface of the workpiece 90 to be detected is placed on the heating unit 30, the temperature monitoring unit (not shown in the figure) is arranged on the surface of the workpiece 90 to be detected, and the fixed cover 10 is used to press and fix the temperature monitoring unit (not shown in the figure), the workpiece 90 to be detected and the heating unit 30 on the substrate 40 in sequence from top to bottom. The heating unit 30 is heated from room temperature to a preset target temperature, so that the lower surface of the workpiece 90 to be detected is heated, and then heat conduction in the plane direction begins. At this time, the temperature monitoring unit (not shown in the figure) arranged on the upper surface of the workpiece 90 to be detected dynamically monitors the change of the upper surface temperature of the workpiece 90 to be detected in real time, thereby obtaining the surface temperature change data of the workpiece 90 to be detected. In actual implementation, laboratory staff can turn on the heating unit 30 to start raising the temperature to the preset target temperature. During this process, the temperature monitoring unit (not shown in the figure) will record the temperature changes of the corresponding positions of the workpiece 90 to be inspected in real time and dynamically, and compare the temperature differences and heating speeds of different points to complete the evaluation of the thermal diffusion capacity of different workpieces 90 to be inspected. It has the characteristics of low cost, simple structure and strong scalability.
[0027] Optionally, in one embodiment, the substrate 40 is in the shape of a cuboid, and the edges and corners thereof are all rounded to form a safety angle to protect the safety of the staff. The substrate 40 can be made of wood or inorganic glass, and wood is selected in this embodiment.
[0028] Optionally, in one embodiment, the heating unit 30 may be a positive temperature coefficient thermistor (PTC), the rated working voltage of the PTC is ≤36V, for example, it may be 6V, 12V, 18V, 24V, etc., and 12V is selected in this embodiment. The maximum temperature of the PTC is 50-200°C, for example, it may be 50°C, 100°C, 150°C or 200°C, etc., and 100°C is selected in this embodiment. It can be understood that after confirming the PTC type of the maximum temperature and rated working voltage, it is connected to the circuit environment of the corresponding voltage to form a closure, that is, a rapid temperature rise process begins. Generally, the preset target temperature can be reached within five minutes and maintained. After the power is cut off, the heating unit 30 naturally cools down until it reaches room temperature.
[0029] Optionally, in order to prevent the workpiece 90 to be inspected from sliding on the upper surface of the heating unit 30, an appropriate amount of thermal grease can be coated on the upper surface of the heating unit 30 to form a relatively uniform wet thin layer, and then the workpiece 90 to be inspected is placed thereon and lightly pressed so that the lower surface of the workpiece 90 to be inspected is fully infiltrated and in contact with the wet thin layer of thermal grease to squeeze out as much air layer as possible between the two.
[0030] Please refer to Figure 2 and Figure 3 The test fixture also includes a buffer layer 60, which is sandwiched between the fixed gland 10 and the temperature monitoring unit (not shown in the figure), and is used to protect the heating unit 30 when the fastener 50 fixes the fixed gland 10 on the substrate 40. Specifically, in the present embodiment, a buffer layer 60 is also provided between the fixed gland 10 and the temperature monitoring unit (not shown in the figure), which is essentially a soft layer, and is used to protect the heating unit 30 and the temperature monitoring unit (not shown in the figure) located therebelow when the fastener 50 presses the fixed gland 10 downward. The material of the buffer layer 60 can be, for example, polyurethane, rubber, silicone, etc. In the present embodiment, polyurethane material is selected. In addition, the provision of the buffer layer 60 can also be used to protect the workpiece 90 to be tested during the test process.
[0031] Optionally, the heating unit 30 includes a temperature control module (not shown in the figure) and a heating module (not shown in the figure), and the temperature control module (not shown in the figure) is used to output a temperature adjustment instruction or program to increase the temperature of the heating module (not shown in the figure) to a preset target temperature. Specifically, in the present embodiment, the temperature control module (not shown in the figure) is electrically connected to the heating module (not shown in the figure), and the staff can set the preset target temperature to be reached by the heating module (not shown in the figure) through the temperature control module (not shown in the figure) according to the actual needs of the experiment, so that when the heating module (not shown in the figure) is working, it is increased from the current temperature to the preset target temperature.
[0032] Optionally, the temperature monitoring unit (not shown in the figure) includes a thermocouple 210 and a data receiving module (not shown in the figure), and the data receiving module (not shown in the figure) is used to receive the surface temperature change data sent by the thermocouple 210 laid on the surface of the workpiece 90 to be detected. Specifically, in the present embodiment, one end of the thermocouple 210 is a metal temperature sensing end, and the other end is pluggably electrically connected to the data receiving module (not shown in the figure). By laying the metal temperature sensing end of the thermocouple 210 on the upper surface of the workpiece 90 to be detected, the data receiving module (not shown in the figure) can receive and display the surface temperature change data of the surface of the workpiece 90 to be detected measured by the thermocouple 210. Before the fixed gland 10 is not tightened, the thermocouple 210 needs to be arranged in place and then tightened. Preferably, the metal temperature sensing end of the thermocouple 210 is located in the center area of the plane between the workpiece 90 to be detected and the fixed gland 10. Further, the data receiving module (not shown in the figure) can also be used for the storage of surface temperature change data, so that subsequent staff can search and analyze.
[0033] Optionally, the thermocouple 210 is provided with a plurality of them, and the data receiving module (not shown in the figure) is used to receive the surface temperature change data sent by the plurality of thermocouples 210 distributed in an array on the surface of the workpiece 90 to be detected. Specifically, in the present embodiment, the number of thermocouples 210 is multiple, and the corresponding thermocouple 210 measurement channels are also multiple, and the plurality of thermocouples 210 are distributed in an array and laid on the upper surface of the workpiece 90 to be detected, so that the data receiving module (not shown in the figure) can simultaneously perform multi-point temperature monitoring, thereby improving the accuracy of the evaluation of the thermal diffusion capacity. In actual implementation, the staff can predetermine the number and monitoring points of the thermocouples 210 according to the needs of the experimental scheme, so as to place the corresponding positions of the thermocouples 210. Exemplarily, the thermocouple 210 measurement channels can be 1 to 12, and in the present embodiment, there are 6 temperature measurement channels.
[0034] Optionally, the fixed gland 10 is a "J" shaped structure. Specifically, in the illustrated structure, the fixed gland 10 has an inner cavity space, and the inner cavity space is adapted to the shape of the heating unit 30. For example, when the heating unit 30 is a cube, the inner cavity space of the fixed gland 10 is also a cube. In this embodiment, the fixed gland 10 is a "J" shaped structure. In the process of the fixed gland 10 pressing down the temperature monitoring unit (not shown in the figure) and the heating unit 30, the inner cavity space can fix the two at any position on the surface of the substrate 40. In this embodiment, the two are fixed in a relatively central area on the surface of the substrate 40.
[0035] Optionally, the fixed gland 10 includes a support portion 110 and a pressing portion 120 protruding from the support portion 110 in the height direction, the pressing portion 120 is used to press the temperature monitoring unit (not shown in the figure) and the heating unit 30 on the substrate 40 in the height direction, and the support portion 110 is used for the fastener 50 to fix it on the substrate 40 when the pressing portion 120 presses the temperature monitoring unit (not shown in the figure) and the heating unit 30. Specifically, in this embodiment, the "J"-shaped fixed gland 10 includes two outwardly extending support portions 110 as the "J" character, and the pressing portion 120 as the protruding portion of the "J". It can be understood that the height of the pressing portion 120 is less than or equal to the sum of the thicknesses of the temperature monitoring unit (not shown in the figure), the workpiece 90 to be detected, and the heating unit 30, so that when the pressing portion 120 is pressed, the three can be better pressed and fixed on the substrate 40.
[0036] Optionally, a positioning groove 410 is provided on the substrate 40, and the heating unit 30 is arranged in the positioning groove 410. Specifically, in this embodiment, in order to avoid affecting the detection result, a positioning groove 410 is provided on the substrate 40 for better fixing the heating unit 30 and preventing it from shaking, thereby improving the accuracy of the evaluation of the thermal diffusion capacity. Exemplarily, in actual implementation, an appropriate amount of room temperature curing glue (the operation time is generally within 20 minutes) can be pre-coated on the surface of the positioning groove 410, and then the heating unit 30 is pressed on the glue layer, and the glue is cured to complete the fixing of the heating unit 30, or a heat-resistant double-sided tape can be applied in the positioning groove 410 to play the same fixing role.
[0037] Optionally, the substrate 40 is provided with through grooves 420 on two opposite sides of the positioning groove 410, the support portion 110 is provided with through holes 111, and the fasteners 50 pass through the through grooves 420 and the through holes 111 to fix the fixed gland 10 on the substrate 40. Specifically, in this embodiment, the through grooves 420 are provided on two opposite sides of the positioning groove 410, and the support portion 110 of the fixed gland 10 is provided with a plurality of symmetrically distributed through holes 111 at the edges of both sides, and the through holes 111 are arranged opposite to the through grooves 420, so that the fasteners 50 can pass through the through grooves 420 and the through holes 111 to fasten the fixed gland 10 on the substrate 40.
[0038] Please refer to Figure 3 and Figure 4The fastener 50 includes a bolt 510 and a nut 520. The bolt 510 passes through the through slot 420 and the through hole 111 in sequence, or passes through the through hole 111 and the through slot 420 in sequence and then is connected with the nut 520. Specifically, in this embodiment, the fastener 50 can achieve the fastening connection between the fixed gland 10 and the substrate 40 in two ways. The first way is to pass the bolt 510 from the through slot 420 on the bottom surface of the substrate 40. At this time, the bottom platform of the bolt 510 is located in the through slot 420, that is, hidden in the substrate 40, and then the bolt 510 is passed through the through hole 111 of the fixed gland 10 and then the nut 520 is used to rotate and tighten. The second way is to pass the bolt 510 from the through hole 111 of the fixed gland 10 and then pass it downward through the through slot 420, and then the nut 520 is passed upward from the through slot 420 on the bottom surface of the substrate 40 to correspond to the bolt 510 and rotate and tighten.
[0039] The present application proposes a test fixture constructed based on common instruments and materials in ordinary laboratories. It has the characteristics of low cost and simple structure, and can quickly and accurately evaluate the thermal diffusion capacity of various polymer materials. It is especially suitable for enterprises to conduct research in the field of thermal conductive polymer materials, and can effectively promote the technical development and industrialization of thermal conductive polymer composite materials, and accelerate the process of thermal conductive material preparation from theory to application.
[0040] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.
Claims
1. A test tool for evaluating the thermal diffusion capacity of polymer materials, characterized in that: include: A fixed pressure cover, a temperature monitoring unit, a heating unit, a substrate and fasteners, wherein the fixed pressure cover is used to sequentially cover the temperature monitoring unit and the heating unit on the substrate in the height direction, and the fasteners are used to fix the fixed pressure cover on the substrate so that two surfaces of the workpiece to be detected located between the temperature monitoring unit and the heating unit are respectively in contact with the temperature monitoring unit and the heating unit, and the temperature monitoring unit is used to obtain surface temperature change data of the workpiece to be detected located on the heating unit in operation.
2. The test tool according to claim 1, characterized in that: The test fixture further includes a buffer layer, which is sandwiched between the fixed pressure cover and the temperature monitoring unit and is used to protect the heating unit and the temperature monitoring unit when the fixed pressure cover is fixed on the substrate by the fastener.
3. The test tool according to claim 1, characterized in that: The heating unit includes a temperature control module and a heating module. The temperature control module is used to increase the temperature of the heating module to a preset target temperature.
4. The test tool according to claim 1, characterized in that: The temperature monitoring unit includes a thermocouple and a data receiving module, and the data receiving module is used to receive surface temperature change data sent by the thermocouple laid on the surface of the workpiece to be detected.
5. The test tool according to claim 4, characterized in that: There are multiple thermocouples, and the data receiving module is used to receive surface temperature change data sent by multiple thermocouples distributed in an array and laid on the surface of the workpiece to be detected.
6. The test tool according to claim 1, characterized in that: The fixed gland is a "J" shaped structure.
7. The test fixture according to claim 6, characterized in that: The fixed pressure cover includes a supporting portion and a pressing portion protruding from the supporting portion in the height direction, the pressing portion is used to press the temperature monitoring unit and the heating unit onto the substrate in sequence in the height direction, and the supporting portion is used for the fastener to fix the temperature monitoring unit and the heating unit onto the substrate when the pressing portion presses the temperature monitoring unit and the heating unit.
8. The test tool according to claim 7, characterized in that: A positioning groove is provided on the substrate, and the heating unit is arranged in the positioning groove.
9. The test fixture according to claim 8, characterized in that: The substrate is provided with through grooves on two opposite sides of the positioning groove, the support portion is provided with a through hole, and the fastener passes through the through groove and the through hole to fix the fixed pressure cover on the substrate.
10. The test fixture according to claim 9, characterized in that: The fastener comprises a bolt and a nut. The bolt passes through the through slot and the through hole in sequence, or passes through the through hole and the through slot in sequence and then is connected with the nut.