A heat pipe performance testing and positioning fixture

Abstract

This utility model relates to the field of heat pipe testing technology, specifically a heat pipe performance testing and positioning fixture; it includes a body; a testing platform is slidably connected to the upper end of the body; the number of testing platforms is set to two; a lead screw is set between the two testing platforms; the lead screw is rotatably connected to the body; a drive motor is installed on one side of the body; the drive motor is used to drive the lead screw to rotate; this utility model, by setting the lead screw, enables the lead screw to drive the two testing platforms to move closer to each other, so that the two testing platforms drive the stop blocks to clamp and position the heat pipe placed on the testing platforms, ensuring that the axis of the clamped heat pipe coincides with the center reference line of the body, so that when the telescopic rod between the two testing platforms drives the soldering iron to approach the heat pipe, the soldering iron can fit in contact with the center of the heat pipe, eliminating the need for manual judgment of the heating position in the middle of the heat pipe by the naked eye, greatly reducing the influence of human error, and thus improving the accuracy of heat pipe thermal performance testing.

Description

Technical Field

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

[0002] A heat pipe is a sealed, vacuum-sealed metal tube filled with a low-boiling-point working fluid (such as water, methanol, or sodium). It transfers heat through a cycle of evaporation and condensation of the working fluid, achieving a thermal conductivity hundreds of times that of copper. After production, existing heat pipes undergo thermal performance testing, including measurements of heat transfer efficiency, isothermal properties, and heat transfer coefficient. Testing these properties ensures the heat pipe will not be damaged or compromised by overheating during operation. The isothermal testing method involves first fixing the heat pipe in a positioning fixture, then heating the middle section of the heat pipe with a soldering iron. If the heat pipe performs well, heat will be rapidly transferred to both ends through the working fluid, quickly bringing the temperatures at both ends to a uniform level. If the performance is poor, the temperature difference between the two ends will significantly increase. Since the heating point is located in the middle (not the pre-designed evaporation section), and both ends are passive heat dissipation ends, the core test here is the uniform diffusion of heat along the heat pipe's axis, i.e., the isothermal property of the heat pipe. However, most existing heat pipes are placed directly on the testing platform, and the heating position in the middle of the heat pipe can only be determined manually by visual inspection. This can easily introduce human error, making it difficult to keep the testing position consistent within the same batch of heat pipes. The consistency of the testing position is a key prerequisite for ensuring the accuracy of the heat pipe isothermal test data. Position deviation will ultimately have a direct impact on the accuracy of the test results, making it impossible to provide a reliable basis for heat pipe performance evaluation, and thus affecting the accuracy of heat pipe thermal performance testing. In view of this, in order to overcome the above-mentioned technical problems, this utility model proposes a heat pipe performance testing and positioning fixture, which solves the above-mentioned technical problems. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this invention proposes a heat pipe performance testing and positioning fixture. This invention utilizes a lead screw to drive two testing platforms closer together. These platforms, in turn, use stoppers to clamp and position the heat pipe placed on them, ensuring that the axis of the clamped heat pipe coincides with the central reference line of the machine body. Furthermore, when the telescopic rod between the two testing platforms moves the soldering iron closer to the heat pipe, the soldering iron can be placed in contact with the center of the heat pipe. This eliminates the need for manual visual judgment of the heating position in the center of the heat pipe, significantly reducing the impact of human error and thus improving the accuracy of heat pipe thermal performance testing.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A heat pipe performance testing and positioning fixture of this utility model includes a body; a testing platform is slidably connected to the upper end of the body; two testing platforms are provided; a lead screw is provided between the two testing platforms; the lead screw is rotatably connected to the body; a drive motor is installed on one side of the body; the drive motor is used to drive the lead screw to rotate; a mounting frame is fixedly installed on the upper end of the testing platform; a stop block is provided on one side of the mounting frame; the stop block is fixedly connected to the testing platform; an electric push rod is provided between the mounting frame and the testing platform; one end of the electric push rod is fixedly connected to the mounting frame, and the other end is fixedly connected to a pressure plate; a temperature sensor is installed at the lower end of the pressure plate; a support block is fixedly installed on the upper end of the body; a telescopic rod is rotatably connected to the upper end of the support block; a soldering iron is installed at the end of the telescopic rod away from the support block.

[0005] Preferably, the telescopic rod includes a fixed rod and a straight rod; the fixed rod is rotatably connected to the support block; a circular groove is formed at the end of the fixed rod away from the support block; the straight rod is slidably connected in the circular groove; a ring sleeve is fitted on the surface of the fixed rod and slidably connected to the straight rod; a groove communicating with the circular groove is formed on the surface of the fixed rod; a pressing block is slidably connected in the groove; an inclined groove is formed on the inner wall of the ring sleeve; the pressing block is slidably connected in the inclined groove.

[0006] Preferably, a servo motor is fixedly installed on the upper end of the support block; the servo motor is used to drive the telescopic rod to rotate; a rotating groove is opened at the end of the straight rod away from the fixed rod; a rotating block is rotatably connected in the rotating groove; an electric soldering iron is fixedly installed on the lower end of the rotating block; teeth are fixedly installed on the surface of the rotating block; a transmission gear that meshes with the teeth is provided above the rotating block; the transmission gear is rotatably connected to the straight rod; a transmission motor is installed on one side of the straight rod; the transmission motor is used to drive the transmission gear to rotate.

[0007] Preferably, the rotating block is made of ceramic material; a strip groove is provided at the lower end of the rotating block; the soldering iron is fixedly installed in the strip groove by bolts.

[0008] Preferably, a V-shaped groove is provided on one side of the stop block.

[0009] Preferably, a cover plate is rotatably connected to the upper end of the stop; an L-shaped plate is hinged to the end of the cover plate away from the stop.

[0010] The beneficial effects of this utility model are as follows: 1. This utility model incorporates a lead screw, which drives two testing platforms to approach each other. The two testing platforms then use stoppers to clamp and position the heat pipe placed on them, ensuring that the axis of the clamped heat pipe coincides with the central baseline of the machine body. This allows the soldering iron to be in contact with the center of the heat pipe when the telescopic rod between the two testing platforms moves it closer, eliminating the need for manual visual judgment of the heating position in the center of the heat pipe. This significantly reduces the impact of human error and improves the accuracy of heat pipe thermal performance testing.

[0011] 2. This utility model creates V-shaped grooves on the surface of the baffles, allowing the isosceles trapezoidal end of the heat pipe to be inserted into the V-shaped grooves of the two baffles. This allows the groove opening angle to form a close contact with the trapezoidal end face, which not only enables the baffles to stably clamp the two ends of the heat pipe, but also distributes the clamping force of the baffles to the entire contact area of ​​the trapezoidal hypotenuse, avoiding local stress concentration that could lead to deformation or surface damage of the heat pipe end. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of the telescopic rod installed in this utility model; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 yes Figure 3 Enlarged view of point C in the middle; In the diagram: 1. Machine body; 11. Testing table; 111. Lead screw; 112. Stop block; 113. V-groove; 114. Cover plate; 115. L-shaped plate; 12. Drive motor; 121. Electric push rod; 122. Pressure plate; 123. Temperature sensor; 13. Mounting bracket; 14. Support block; 141. Servo motor; 15. Telescopic rod; 151. Soldering iron; 152. Fixing rod; 153. Straight rod; 154. Circular groove; 155. Ring sleeve; 156. Groove; 157. Clamping block; 158. Inclined groove; 16. Rotating groove; 161. Rotating block; 162. Tooth; 163. Transmission gear; 164. Transmission motor; 165. Strip groove. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] like Figures 1 to 5 As shown, the heat pipe performance testing and positioning fixture of this utility model includes a body 1; a testing platform 11 is slidably connected to the upper end of the body 1; two testing platforms 11 are provided; a lead screw 111 is provided between the two testing platforms 11; the lead screw 111 is rotatably connected to the body 1; a drive motor 12 is installed on one side of the body 1; the drive motor 12 is used to drive the lead screw 111 to rotate; a mounting frame 13 is fixedly installed on the upper end of the testing platform 11; a mounting frame 13 is provided on one side of the mounting frame 13. There is a stop block 112; the stop block 112 is fixedly connected to the testing table 11; an electric push rod 121 is provided between the mounting frame 13 and the testing table 11; one end of the electric push rod 121 is fixedly connected to the mounting frame 13, and the other end is fixedly connected to a pressure plate 122; a temperature sensor 123 is installed at the lower end of the pressure plate 122; a support block 14 is fixedly installed at the upper end of the body 1; a telescopic rod 15 is rotatably connected to the upper end of the support block 14; an electric soldering iron 151 is installed at the end of the telescopic rod 15 away from the support block 14.

[0016] In one embodiment of this utility model, the telescopic rod 15 includes a fixed rod 152 and a straight rod 153; the fixed rod 152 is rotatably connected to the support block 14; a circular groove 154 is provided at the end of the fixed rod 152 away from the support block 14; the straight rod 153 is slidably connected in the circular groove 154; a ring sleeve 155 is sleeved on the surface of the fixed rod 152 and slidably connected to the straight rod 153; a groove 156 communicating with the circular groove 154 is provided on the surface of the fixed rod 152; a pressing block 157 is slidably connected in the groove 156; an inclined groove 158 is provided on the inner wall of the ring sleeve 155; the pressing block 157 is slidably connected in the inclined groove 158.

[0017] In one embodiment of this utility model, a servo motor 141 is fixedly installed on the upper end of the support block 14; the servo motor 141 is used to drive the telescopic rod 15 to rotate; a rotating groove 16 is opened at the end of the straight rod 153 away from the fixed rod 152; a rotating block 161 is rotatably connected in the rotating groove 16; an electric soldering iron 151 is fixedly installed at the lower end of the rotating block 161; teeth 162 are fixedly installed on the surface of the rotating block 161; a transmission gear 163 that meshes with the teeth 162 is provided above the rotating block 161; the transmission gear 163 is rotatably connected to the straight rod 153; a transmission motor 164 is installed on one side of the straight rod 153; the transmission motor 164 is used to drive the transmission gear 163 to rotate.

[0018] In one embodiment of this utility model, the rotating block 161 is made of ceramic material; a strip groove 165 is provided at the lower end of the rotating block 161; and the soldering iron 151 is fixedly installed in the strip groove 165 by bolts.

[0019] In one embodiment of this utility model, a V-groove 113 is provided on one side of the stop block 112.

[0020] In one embodiment of this utility model, a cover plate 114 is rotatably connected to the upper end of the stop block 112; an L-shaped plate 115 is hinged to the end of the cover plate 114 away from the stop block 112.

[0021] During operation, existing heat pipes are mostly placed directly on the testing platform 11, and the heating position in the middle of the heat pipe can only be determined manually by visual inspection. This can easily introduce human error, making it difficult to keep the testing position consistent within the same batch of heat pipes. The consistency of the testing position is a key prerequisite for ensuring the accuracy of the heat pipe isothermal test data. Position deviation will ultimately have a direct impact on the accuracy of the test results, making it impossible to provide a reliable basis for heat pipe performance evaluation, and thus affecting the accuracy of the heat pipe's thermal performance test. To address this issue, this utility model incorporates a lead screw 111, which drives two testing platforms 11 to approach each other. The two testing platforms 11 then use a stop block 112 to clamp and position the heat pipe placed on the testing platform 11, ensuring that the axis of the clamped heat pipe coincides with the center baseline of the machine body 1. This allows the extension rod 15 between the two testing platforms to bring the soldering iron 151 close to the heat pipe, ensuring that the soldering iron 151 is in contact with the center of the heat pipe. This eliminates the need for manual visual judgment of the heating position in the center of the heat pipe, significantly reducing human error and improving the accuracy of heat pipe thermal performance testing. In use, the user first places the heat pipe on the two testing platforms 11, so that both ends of the heat pipe are located on the upper ends of the two testing platforms 11. Then, the user controls the drive motor 12 to run, so that the drive motor 12 drives the lead screw 111 to rotate. Since the threads at both ends of the lead screw 111 are set oppositely, and the two testing platforms 11 are connected to the two ends of the lead screw 111 by a helical drive, when the drive motor 12 drives the lead screw 111 to rotate, the lead screw 111 can drive the two testing platforms 11 to move closer to each other, so that the two testing platforms 11 drive the two upper stops 112 to move closer to each other. Only the two stops 112 contact the two ends of the heat pipe, so that the two stops 112 clamp the heat pipe. At this time, the axis of the clamped heat pipe coincides with the center reference line of the machine body 1. The shapes of the two ends of existing heat pipes are mostly square planes or isosceles trapezoidal planes. This is because the square planes at the ends of the heat pipe have a larger contact area with the heat dissipation components, while the isosceles trapezoidal plane is designed so that the hypotenuse can guide the heat pipe and the heat dissipation components to automatically align, reducing assembly errors. At the same time, the trapezoidal end face can form a bevel structure during welding, which can enhance the amount of solder filling, improve the connection strength and the reliability of heat conduction. Therefore, in order to effectively clamp the two ends of the heat pipe in the isosceles trapezoidal plane, this utility model provides a V-groove 113 on the surface of the baffle 112. This allows the isosceles trapezoidal end of the heat pipe to be inserted into the V-groove 113 of the two baffles 112, so that the groove angle of the V-groove 113 can form a close contact with the trapezoidal end face. This not only allows the baffles 112 to stably clamp the two ends of the heat pipe, but also allows the clamping force of the baffles 112 to be distributed to the entire contact area of ​​the trapezoidal hypotenuse, avoiding local stress concentration that could lead to deformation or surface damage of the heat pipe end. When clamping the heat pipe at the square flat end, the user only needs to flip the cover plate 114 so that the cover plate 114 can drive the L-shaped plate 115 to rotate synchronously, so that the cover plate 114 can cover the upper end of the stop block 112 and block the upper port of the V-shaped groove 113. Then, rotate the L-shaped plate 115 so that the L-shaped plate 115 can rotate to the groove opening of the V-shaped groove 113, so that the L-shaped plate 115 blocks the groove opening of the V-shaped groove 113. At this time, the L-shaped plate 115 and the stop block 112 are clamped together. 2. With the V-groove 113 on one side, the user only needs to place the square flat end of the heat pipe between the two L-shaped plates 115 and control the drive motor 12 to drive the lead screw 111 to rotate. This causes the lead screw 111 to drive the stop block 112 to clamp the L-shaped plate 115, so that the square flat end of the heat pipe is in close contact with the two inner side walls of the L-shaped plate 115. This eliminates the need to replace the stop block 112, reduces the time spent on replacing the stop block 112, and improves the detection efficiency of heat pipes with different end faces. After the stop block 112 clamps the heat pipe, the electric push rod 121 is controlled to move, so that the electric push rod 121 can push the pressure plate 122 down, so that the pressure plate 122 presses the upper end face of the heat pipe. Then, the servo motor 141 is controlled to move, so that the servo motor 141 can drive the telescopic rod 15 to rotate, so that the telescopic rod 15 drives the soldering iron 151 to rotate closer to the heat pipe, so that the soldering iron 151 contacts the upper end face of the center of the heat pipe. Before the soldering iron 151 contacts the heat pipe, the soldering iron 151 is first controlled to be energized and heated to the set temperature. When the soldering iron 151 contacts the upper end face of the center of the heat pipe, the soldering iron 151 will heat the center of the heat pipe. Since the temperature sensor 123 is embedded in the lower end of the pressure block, the temperature sensor 123 can monitor the heat transferred to both ends of the heat pipe in real time, that is, test the ability of heat to diffuse evenly in the axial direction of the heat pipe, and obtain the isothermal property of the heat pipe. Because heat pipes come in various shapes, such as vertical and V-shaped, the distance between the center of the heat pipe and the servo motor 141 varies depending on the shape of the heat pipe being tested. Therefore, a telescopic rod 15 is provided, allowing the user to adjust its length to ensure stable contact between the soldering iron 151 and the upper surface of the heat pipe of different shapes. To change the length of the telescopic rod 15, the user simply pulls the ring 155, causing the inclined groove 158 on the inner wall to slide away from the servo motor 141. This causes the clamping block 157 to slide relative to the bottom of the inclined groove 158, preventing the bottom of the groove from pressing against the clamping block 157 and thus removing the clamping block 157 from contact with the straight rod 153. The user can then pull the straight rod 153 to slide within the circular groove 154 to adjust the length of the telescopic rod 15. Once the length is adjusted, push... The moving ring sleeve 155 approaches the servo motor 141, causing the clamping block 157 in the groove 156 to slide along the inclined groove 158. The inclined groove 158 exerts a squeezing force on the clamping block 157 through the bottom of the groove, causing the squeezed clamping block 157 to press against the straight rod 153, thus fixing the straight rod 153 in the circular groove 154. After adjusting the length of the telescopic rod 15, the transmission motor 164 is controlled to drive the transmission gear 163 to rotate, so that the transmission gear 163 can drive the teeth 162 that mesh with it to drive the rotating block 161 to rotate, so that the rotating block 161 can drive the soldering iron 151 to rotate. When the soldering iron 151 contacts the heat pipe, the lower end face of the soldering iron 151 remains parallel to the upper end face of the heat pipe, thereby increasing the contact area between the soldering iron 151 and the heat pipe, thus achieving stable and efficient heat transfer and avoiding interference to the test results caused by local overheating or poor contact. By making the rotating block 161 into a ceramic material, it achieves excellent heat insulation, preventing heat from the soldering iron 151 from being transferred to the telescopic rod 15 or the servo motor 141. This prevents the telescopic rod 15 from deforming due to heat and avoids overheating damage to the servo motor 141, thus extending the service life of the telescopic rod 15 and the servo motor 141. Furthermore, by providing a slot 165 at the lower end of the rotating block 161, the soldering iron 151 is bolted into the slot, making the connection between the soldering iron 151 and the rotating block 161 detachable. This allows for quick replacement of the soldering iron 151 when it is damaged, improving the practicality of this invention.

[0022] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for testing heat pipe performance, characterized in that: Includes a body (1); a testing platform (11) is slidably connected to the upper end of the body (1); there are two testing platforms (11); a lead screw (111) is provided between the two testing platforms (11); the lead screw (111) is rotatably connected to the body (1); a drive motor (12) is installed on one side of the body (1); the drive motor (12) is used to drive the lead screw (111) to rotate; a mounting frame (13) is fixedly installed on the upper end of the testing platform (11); a stop block (112) is provided on one side of the mounting frame (13); the stop block (112) is fixedly installed on one side of the mounting frame (13); 12) Fixed to the testing table (11); an electric push rod (121) is provided between the mounting frame (13) and the testing table (11); one end of the electric push rod (121) is fixed to the mounting frame (13), and the other end is fixed to a pressure plate (122); a temperature sensor (123) is installed at the lower end of the pressure plate (122); a support block (14) is fixedly installed at the upper end of the body (1); a telescopic rod (15) is rotatably connected to the upper end of the support block (14); an electric soldering iron (151) is installed at the end of the telescopic rod (15) away from the support block (14).

2. The heat pipe performance testing positioning fixture according to claim 1, characterized in that: The telescopic rod (15) includes a fixed rod (152) and a straight rod (153); the fixed rod (152) is rotatably connected to the support block (14); a circular groove (154) is provided at one end of the fixed rod (152) away from the support block (14); the straight rod (153) is slidably connected in the circular groove (154); a ring sleeve (155) is sleeved on the surface of the fixed rod (152) and slidably connected to the straight rod (153); a groove (156) communicating with the circular groove (154) is provided on the surface of the fixed rod (152); a pressing block (157) is slidably connected in the groove (156); an inclined groove (158) is provided on the inner wall of the ring sleeve (155); the pressing block (157) is slidably connected in the inclined groove (158).

3. The heat pipe performance testing positioning fixture according to claim 2, characterized in that: A servo motor (141) is fixedly installed on the upper end of the support block (14); the servo motor (141) is used to drive the telescopic rod (15) to rotate; a rotating groove (16) is opened at the end of the straight rod (153) away from the fixed rod (152); a rotating block (161) is rotatably connected in the rotating groove (16); an electric soldering iron (151) is fixedly installed at the lower end of the rotating block (161); teeth (162) are fixedly installed on the surface of the rotating block (161); a transmission gear (163) that meshes with the teeth (162) is provided above the rotating block (161); the transmission gear (163) is rotatably connected to the straight rod (153); a transmission motor (164) is installed on one side of the straight rod (153); the transmission motor (164) is used to drive the transmission gear (163) to rotate.

4. The heat pipe performance testing positioning fixture according to claim 3, characterized in that: The rotating block (161) is made of ceramic material; a strip groove (165) is provided at the lower end of the rotating block (161); the soldering iron (151) is fixedly installed in the strip groove (165) by bolts.

5. A heat pipe performance testing positioning fixture according to claim 4, characterized in that: A V-shaped groove (113) is provided on one side of the stop (112).

6. The heat pipe performance testing and positioning fixture according to claim 5, characterized in that: The upper end of the stop (112) is rotatably connected to a cover plate (114); an L-shaped plate (115) is hinged to the end of the cover plate (114) away from the stop (112).

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