A hand-held heat pipe performance test fixture

Abstract

The utility model provides a kind of hand-held heat pipe performance test fixture, comprising: handle, setting in the top of fixture, for hand-held operation;Press block, it is integrally formed structure pedestal, its bottom is equipped with installation groove;Thermal conductive copper block, setting in the bottom of press block, install through installation groove, thermal conductive copper block inside is equipped with the through hole passing through it, for heat pipe to be inserted;Fixed block, install in the installation groove of the bottom of press block, for supporting and heat insulation connection thermal conductive copper block and press block;Fixed component, including the first screw for connecting thermal conductive copper block and fixed block, and the second screw, washer and nut for fixed block is fixed in the bottom of press block.Press block supports and is heat-insulated using acrylic or high-strength plastic plate, reduces heat unnecessary dissipation, improves test stability.Handle is arranged obliquely, and it is comfortable to hold;Complete set of fixture cost is low, structure is simple, easy to process maintenance, applicable to laboratory research and development, production line sampling inspection and on-site portable test and a variety of use scenarios.

Description

Technical Field

[0001] This utility model relates to the field of heat pipe performance testing technology, and more specifically to a handheld heat pipe performance testing fixture. Background Technology

[0002] Heat pipes, as highly efficient heat transfer elements, are widely used in electronic heat dissipation, new energy, aerospace, and other fields. Testing their thermal conductivity is crucial for research and development and quality control. Currently, known heat pipe performance testing fixtures typically consist of a heating and cooling system, a temperature measurement and data acquisition system, an insulation structure and support mechanism, and a control and regulation system. The heating device often uses resistance wire heating or high-frequency induction heating to provide a heat source for the evaporation section of the heat pipe; the cooling system dissipates heat to the condensation section through water cooling or air cooling; the temperature measurement system generally uses thermocouples or NTC thermistors, combined with a data acquisition module to calculate parameters such as thermal resistance and heat transfer power. However, existing heat pipe testing fixtures have the following shortcomings: the testing environment is sensitive to external interference and easily affected by heat loss, resulting in poor test result stability; the fixture structure is complex and installation is cumbersome, relying on manual positioning, leading to low testing efficiency and poor repeatability; the overall cost is high, the equipment is bulky, and its functionality is limited, making it difficult to meet the needs of portable testing or multi-scenario applications. Therefore, there is an urgent need for a test fixture that is compact, easy to operate, has high thermal contact efficiency, and is applicable to heat pipes of various specifications, so as to improve the accuracy, efficiency and practicality of heat pipe thermal conductivity testing. Utility Model Content

[0003] In view of this, the present invention provides a handheld heat pipe performance testing fixture.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A handheld heat pipe performance testing fixture includes: a handle located on the top of the fixture for handheld operation; a pressure block, an integrally formed structural base with a mounting groove at its bottom; a thermally conductive copper block located at the bottom of the pressure block and installed through the mounting groove, the thermally conductive copper block having a through hole for heat pipe insertion; a fixing block installed in the mounting groove at the bottom of the pressure block for supporting and thermally insulating the thermally conductive copper block and the pressure block; and a fixing assembly including a first screw for connecting the thermally conductive copper block and the fixing block, and a second screw, washer, and nut for fixing the fixing block to the bottom of the pressure block.

[0006] In the preferred technical solution, the width of the heat-conducting copper block is smaller than that of the fixing block. After installation, its two sides do not contact the pressure block, but are only connected through the fixing block, thereby achieving separation of heat conduction and heat insulation functions.

[0007] In a preferred embodiment, the bottom of the heat-conducting copper block is provided with a groove for embedding an electric heating element, so as to achieve rapid heating of the heat pipe and improve the heat conduction efficiency.

[0008] In the preferred technical solution, the handle is installed at an angle on the horizontal top surface of the pressure block, and its installation angle facilitates hand operation.

[0009] In the preferred technical solution, the through hole is a cylindrical through hole that penetrates the heat-conducting copper block. Its inner diameter matches the outer diameter of the heat pipe, and the tolerance is controlled within 0.1 mm. The inner wall of the through hole is machined and polished.

[0010] In the preferred embodiment, the mounting groove is located at the bottom of the pressure block, and its shape is adapted to the fixing block for fitting and mounting, while accommodating the heat-conducting copper block carried by the fixing block.

[0011] In the preferred embodiment, the second screw in the fixing component passes through the bottom of the pressure block and connects to the fixing block, and is fastened and fixed in conjunction with the washer and nut.

[0012] In the preferred technical solution, the surfaces of the handle, pressure block, fixing block, heat-conducting copper block and fixing components are all degreased to remove oil and impurities, thereby improving the contact thermal conductivity and connection stability between the components.

[0013] In the preferred technical solution, the heat-conducting copper block is a replaceable structure, and the inner diameter of the through hole can be replaced with a heat-conducting copper block of the corresponding specification according to different heat pipe diameters to adapt to heat pipes with diameters of Φ6 to Φ10 mm.

[0014] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial technical effects:

[0015] This invention utilizes a high-purity, precision-machined thermally conductive copper block as the heat source component. The through-hole is perfectly matched to the outer diameter of the heat pipe, and the mirror-polished inner wall ensures a tight fit between the heat pipe and the copper block, effectively reducing thermal resistance and improving heat transfer efficiency. The fixing block in the fixture is a heat-insulating structure, effectively preventing heat transfer to the support structure. Simultaneously, the pressure block is supported and insulated with acrylic or high-strength plastic plates, reducing unnecessary heat loss and improving test stability. The handle is angled for comfortable grip; it can be quickly assembled and disassembled with the fixing components, facilitating production and use, and enabling rapid positioning and replacement of the heat pipe, suitable for one-handed operation. The thermally conductive copper block adopts a modular design, allowing for replacement according to the outer diameter of the heat pipe, accommodating heat pipes of different specifications from Φ6 to Φ10mm, meeting various testing needs. The entire fixture is low-cost, simple in structure, and easy to process and maintain, suitable for various application scenarios such as laboratory research and development, production line sampling inspection, and portable on-site testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is an exploded structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0019] Reference numerals: 1. Handle; 2. Pressure block; 3. Nut; 4. Washer; 5. First screw; 6. Fixing block; 7. Thermally conductive copper block; 8. Second screw; 21. Mounting slot; 71. Through hole; 72. Strip groove. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0021] In the description of this application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] This invention is used for rapid thermal conductivity testing of heat pipes. It features a compact design, easy one-handed operation, stable thermal contact, and strong structural versatility, making it suitable for laboratory, production line sampling, and portable on-site testing. Please refer to [link / reference]. Figure 1 ,2 The fixture includes: a handle 1, a pressure block 2, a fixing block 6, a heat-conducting copper block 7, and a fixing assembly. The handle 1 is mounted on the horizontal surface of the pressure block 2 at the top of the fixture and secured with screws. The handle 1 is angled, forming a 15-40 degree angle between its axis and the normal to the top surface of the pressure block 2. This angle range is based on ergonomic design, facilitating one-handed grip for testing the heat pipe, and can be adjusted according to different user operating habits. The handle 1 is a one-piece molded structure, with an outer layer that can be covered with thermoplastic rubber to improve grip comfort and anti-slip performance. The pressure block 2 is a one-piece molded base made of acrylic material, balancing mechanical strength, heat resistance, and thermal insulation to ensure structural stability and prevent heat transfer to the operator. The bottom of the pressure block 2 has a rectangular mounting groove 21 for embedding the fixing block 6 and the heat-conducting copper block 7. A longitudinal strip-shaped hole runs through the center of the pressure block, with a recessed space for accommodating a nut 3 and a washer 4. The fixing block 6 is made of metal or high-performance plastic, providing excellent thermal insulation. Its upper surface fits tightly against the mounting groove 21 at the bottom of the pressure block. The fixing block 6 has internal slots corresponding to the slots in the pressure block 2, allowing the insertion of the second screw 8 for longitudinal locking. The thickness of the fixing block 6 is optimized to effectively prevent direct heat transfer to the pressure block while maintaining structural strength.

[0024] Furthermore, the heat-conducting copper block 7 is precision-machined from high-purity copper (T2 copper) to ensure excellent thermal conductivity. The width of the heat-conducting copper block 7 is smaller than that of the fixing block 6, and it is connected to the pressure block 2 only through the fixing block 6, achieving functional separation of heat conduction and insulation to prevent heat loss. A cylindrical through-hole 71 is provided in the center of the heat-conducting copper block 7, with its inner diameter strictly matching the outer diameter of the heat pipe, with tolerance controlled within 0.05–0.1 mm, ensuring tight contact between the heat pipe and the copper block and reducing thermal resistance. The inner wall of the through-hole is machined and mirror-polished to improve thermal contact efficiency and prevent gaps. A U-shaped or rectangular groove 72 is provided at the bottom of the heat-conducting copper block 7 for embedding electric heating elements (such as plate heaters or thermoelectric films), which can uniformly heat the evaporation section of the heat pipe. The electric heating elements are powered by an external constant-temperature power supply, ensuring precise temperature control and stable heating. The copper block 7 features a modular design, allowing for quick replacement based on the diameter of the heat pipe being tested. It is compatible with various heat pipes ranging from Φ6 to Φ10 mm, and the replacement process is simple, requiring no disassembly of other structural components.

[0025] Furthermore, the fixing assembly includes a first screw 5, a second screw 8, a washer 4, and a nut 3. The first screw 5 is used to fix the heat-conducting copper block 7 to the fixing block 6. The second screw 8 passes through the slotted hole of the fixing block 6 from bottom to top and enters the corresponding slotted hole of the pressure block 2, where it is tightened in conjunction with the elastic washer 4 and the hexagonal nut 3 embedded in the through hole. The nut 3 adopts an embedded design, closely fitting the edge of the slot to prevent rotation and detachment, achieving quick one-sided tightening, improving the efficiency of device assembly and disassembly and structural reliability. The washer 4 is made of highly elastic and wear-resistant material to buffer pressure, avoid stress concentration, and extend the service life of the components. It should be noted that in other embodiments, the fixing assembly of this utility model can also adopt other fastening connection methods to meet the needs of different application scenarios and assembly convenience. All components (pressure block 2, handle 1, fixing block 6, heat-conducting copper block 7, first screw 5, second screw 8, nut 3, washer 4) have undergone strict degreasing and cleaning to remove oil and impurities, ensuring the stability of the fastening connection and the heat conduction performance between the components. The key contact surfaces (the contact surface between the heat-conducting copper block 7 and the heat pipe, and the interface between the fixing block 6 and the pressure block 2) are all precision machined by CNC equipment to ensure flatness and assembly accuracy, effectively improving heat conduction efficiency and the repeatability of the test device.

[0026] Furthermore, the usage process of this utility model is as follows: According to the diameter specification of the heat pipe being tested, select a suitable heat-conducting copper block 7 and install and fix it to the bottom of the fixing block 6 with the first screw 5; embed the fixing block 6 into the mounting groove 21 at the bottom of the pressure block 2, so that it fits tightly against the bottom surface of the pressure block; the second screw 8 passes through the corresponding strip-shaped slots of the fixing block 6 and the pressure block 2 in sequence, and completes the longitudinal fastening with the washer 4 and the nut 3 in the strip-shaped slot of the pressure block 2; operate by holding the handle 1, insert the heat pipe through the through hole 71 of the heat-conducting copper block 7, so that it is in full contact with the inner wall of the through hole and maintains a tight fit; embed the electric heating element in the strip-shaped groove 72 at the bottom of the heat-conducting copper block 7, and heat it by energizing it with an external temperature-controlled power supply to simulate the working state of the heat source; the operator can achieve single-handed gripping and control of the device through the handle 1, which is convenient for quick positioning and disassembly of the heat pipe; in order to cooperate with the use of this utility model, it is generally necessary to place a copper block (hereinafter referred to as the temperature-sensing copper block) at the other end of the heat pipe as a reference for cold end temperature detection. The temperature-sensing copper block is specially designed with mounting grooves or attachment points for the temperature-sensing wire, facilitating stable installation of the temperature sensor. The temperature-sensing wire, a crucial component of the temperature acquisition system, is attached to the surface of the copper block for real-time monitoring of the cold end temperature. A layer of high thermal conductivity material is placed between the temperature-sensing wire and the copper block, significantly improving temperature response sensitivity and testing accuracy. When heated, the temperature at end 7 of the heat-conducting copper block rises rapidly, and heat is transferred along the heat pipe to the temperature-sensing copper block end. The temperature-sensing wire records temperature change data in real time. By analyzing the temperature changes at both ends and the time response curve, the thermal conductivity and process stability of the heat pipe can be accurately evaluated. It should be noted that the temperature-sensing copper block is not part of the structural design of this invention and is not shown in the accompanying drawings.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A handheld heat pipe performance testing fixture, characterized in that: include: A handle (1) is provided on the top of the fixture for hand operation; The pressure block (2) is an integrally formed structural base with a mounting groove (21) at its bottom. A heat-conducting copper block (7) is set at the bottom of the pressure block (2) and installed through the mounting groove (21). The heat-conducting copper block (7) has a through hole (71) inside for heat pipe insertion. The fixing block (6) is installed in the mounting groove (21) at the bottom of the pressure block (2) to support and heat-insulate the connection between the heat-conducting copper block (7) and the pressure block (2). The fixing assembly includes a first screw (5) for connecting the heat-conducting copper block (7) and the fixing block (6), and a second screw (8), a washer (4) and a nut (3) for fixing the fixing block (6) to the bottom of the pressure block (2).

2. The handheld heat pipe performance testing fixture according to claim 1, characterized in that: The width of the heat-conducting copper block (7) is smaller than that of the fixing block (6). After installation, its two sides do not contact the pressure block (2) and are only connected through the fixing block (6) to achieve separation of heat conduction and heat insulation functions.

3. The handheld heat pipe performance testing fixture according to claim 1, characterized in that: The bottom of the heat-conducting copper block (7) is provided with a groove (72) for embedding an electric heating element, so as to achieve rapid heating of the heat pipe and improve the heat conduction efficiency.

4. The handheld heat pipe performance testing fixture according to claim 1, characterized in that: The handle (1) is installed obliquely on the horizontal top surface of the pressure block (2), and its installation angle is convenient for hand operation.

5. The handheld heat pipe performance testing fixture according to claim 1, characterized in that: The through hole (71) is a cylindrical through hole that penetrates the heat-conducting copper block (7). Its inner diameter matches the outer diameter of the heat pipe, and the tolerance is controlled within 0.1 mm. The inner wall of the through hole (71) is machined and polished.

6. The handheld heat pipe performance testing fixture according to claim 1, characterized in that: The mounting groove (21) is located at the bottom of the pressure block (2), and its shape is adapted to the fixing block (6) for fitting and installing it, while accommodating the heat-conducting copper block (7) carried by the fixing block (6).

7. The handheld heat pipe performance testing fixture according to claim 1, characterized in that: The second screw in the fixing component passes through the bottom of the pressure block (2) and connects to the fixing block (6), and is fastened and fixed in conjunction with the washer (4) and the nut (3).

8. A handheld heat pipe performance testing fixture according to claim 1, characterized in that: The surfaces of the handle (1), pressure block (2), fixing block (6), heat-conducting copper block (7) and fixing components are all degreased to remove oil and impurities and improve the contact heat conduction performance and connection stability between the components.

9. A handheld heat pipe performance testing fixture according to claim 1, characterized in that: The heat-conducting copper block (7) is a replaceable structure. The inner diameter of the through hole (71) can be replaced with a heat-conducting copper block (7) of the corresponding specification according to different heat pipe diameters, so as to adapt to heat pipes with diameters of Φ6~Φ10mm.

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