A graphene heat dissipation film testing device

Abstract

The present invention relates to a graphene heat dissipation film testing device, and to the technical field of graphene heat dissipation film testing; the device comprises a heat dissipation test frame, on which a clamp for clamping and limiting the graphene heat dissipation film is arranged, and testers for testing the graphene heat dissipation film are arranged at the upper and lower ends of the clamp; the present invention can realize stable clamping of the graphene heat dissipation film, and avoid the movement of the graphene heat dissipation film during the process of testing the thermal conductivity of the graphene heat dissipation film; secondly, the clamp can clamp and fix graphene heat dissipation films of different sizes and shapes, which greatly improves the efficiency and applicability of the graphene heat dissipation film detection in this embodiment; then the present invention can perform different performance tests on the clamped graphene heat dissipation film, ensure the overall performance of the graphene heat dissipation film, and ensure the high quality of the graphene heat dissipation film.

Description

Technical Field

[0001] The invention relates to the technical field of graphene heat dissipation film testing, and in particular to a graphene heat dissipation film testing device. Background Art

[0002] Graphene material has excellent thermal conductivity, with a theoretical thermal conductivity of up to 5300W / (m·K), making it an ideal alternative to traditional heat dissipation materials.

[0003] Graphene heat dissipation film refers to a highly directional heat-conducting film made of graphene and stacked with multiple layers of graphene. The preparation of graphene heat dissipation film usually uses natural scaly graphite as the main raw material, and the finished product is obtained through processes such as defoaming, coating, drying, cutting, carbonization, graphitization, and film pressing. Since the macroscopic graphene heat-conducting film is a multi-dimensional heat-conducting channel formed by overlapping multiple layers of graphene, it has high thermal conductivity. The thermal conductivity decreases with the increase of thickness, and the thermal conductivity is 900-1300W / MKW.

[0004] Graphene heat dissipation film has the advantages of light weight, high thermal conductivity, low thermal resistance and good flexibility. It is widely used in aerospace, electric vehicles, communications, new energy, consumer electronics, medical equipment, photovoltaics and other fields, providing a perfect heat dissipation solution for the portability of mobile smart devices.

[0005] For example, a Chinese patent with the authorization announcement number CN213779945U discloses a thermal conductive film heat dissipation performance test device, in which a test cavity is formed in a test container, a heating element is installed in the test cavity to heat the sample, a temperature measuring element is installed in the test cavity to measure the temperature of the sample, and a vacuum element is connected to the test container to vacuum the test cavity; the inner wall unit encloses the test cavity, and the outer wall unit covers at least part of the inner wall unit; the thermal conductive film heat dissipation performance test device also includes a circulating water supply machine, the outlet of the circulating water supply machine is connected to the flow outlet, and the outlet of the circulating water supply machine is connected to the flow inlet. The purpose of this application is to provide a thermal conductive film heat dissipation performance test device in view of the problem that the ambient temperature has a great influence on the test results in the current thermal conductive film heat dissipation performance test, resulting in low test result accuracy.

[0006] However, the above heat dissipation film testing device still has some shortcomings in actual use:

[0007] 1. The thermal conductive film is heated by a heating element, and the thermal conductivity of the heated thermal conductive film is tested by a temperature measuring element. Moreover, the test can be performed in a test container to avoid the influence of the external environment on the test of the thermal conductive film. However, when testing the thermal conductive film, the prior art does not set up a synchronous control test group, and only tests the thermal conductivity of the thermal conductive film through a single group test, which will lead to a lack of comparative verification of the results of subsequent tests, resulting in accidental test results.

[0008] 2. In the above-mentioned prior art, when testing the thermal conductivity of the thermally conductive film, the temperature measuring element is only placed at a single position of the thermally conductive film for monitoring, which will cause the temperature detected by the temperature measuring element to be inaccurate, and the position of the temperature measuring element for monitoring the temperature cannot be adjusted.

[0009] 3. In the prior art, the existing devices can only detect the graphene heat dissipation film in a single way, resulting in a single detection method; when the graphene heat dissipation film needs to be detected in a variety of different ways, it is necessary to move the graphene heat dissipation film to other detection equipment or set up multiple groups of different detection equipment, which leads to the hidden danger of the graphene heat dissipation film being damaged by external factors during the movement, thereby affecting the detection accuracy of the graphene heat dissipation film.

[0010] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing heat dissipation film testing devices. Summary of the invention

[0011] In order to solve the above problems, the present invention provides a graphene heat dissipation film testing device.

[0012] A graphene heat dissipation film testing device comprises a heat dissipation test frame, on which a clamp for clamping and limiting the graphene heat dissipation film is arranged, and upper and lower ends of the clamp are both provided with testers for testing the graphene heat dissipation film.

[0013] The tester includes a bidirectional threaded rod, a fixed block, a support plate, a detection tube, a heating component, a temperature measuring component, a test wheel and a linkage belt; the bidirectional threaded rod is symmetrically rotatable and distributed on both sides of the length direction of the heat dissipation test frame, the fixed block is symmetrically threadedly connected to the bidirectional threaded rod along the height direction of the bidirectional threaded rod, the opposite sides of the two fixed blocks at the same height are fixedly connected with a support plate, the two support plates are symmetrically distributed up and down, the detection tube is symmetrically and movably arranged on the support plate along both sides of the length direction of the support plate, and the detection tube is installed through the support plate, the heating component is arranged in the detection tube of the bidirectional threaded rod located at the upper end of the heat dissipation test frame, and the temperature measuring component is arranged in the detection tube of the bidirectional threaded rod located at the upper end of the heat dissipation test frame.

[0014] The test wheel is fixedly mounted on the bottom of two groups of bidirectional threaded rods, and the linkage belt is sleeved on the test wheel at the bottom of the two bidirectional threaded rods.

[0015] Preferably, the clamp includes a placement rack, a clamping frame, a bar block, a fixing pin, a clamping plate and a clamping compression spring; the placement rack is fixedly mounted in the middle of the heat dissipation test rack, the clamping frame is slidably mounted on the inner side of the placement rack, and a sliding slot for sliding cooperation of the clamping frame is provided in the middle of the placement rack, the bar block is symmetrically slidably mounted on the inner wall of the clamping frame, and the two bar blocks are on the same plane, the fixing pins are arranged at the upper and lower ends of the bar block along both sides of the height direction of the bar block, the clamping plate is slidably mounted on the fixing pin, and the clamping plates are symmetrically distributed on both sides of the bar block from top to bottom, the clamping compression spring is arranged between the fixing pin and the clamping plate, and one end of the clamping compression spring abuts against the top of the fixing pin, and the other end abuts against the upper end of the clamping plate, and the clamping compression spring is sleeved on the fixing pin.

[0016] Preferably, the clamping frame is also provided with a clamping adjustment unit for clamping graphene heat dissipation films of different sizes, and the clamping adjustment unit includes a telescopic push rod, a limit column and a limit groove; the telescopic push rod is symmetrically arranged on the inner wall of the clamping frame on both sides along the length direction of the clamping frame, and the opposite sides of the telescopic push rod have a tendency to approach each other and are fixedly connected to the strip block, the limit column is fixedly installed on the clamping plate on one side of the strip block, and the limit groove is opened on the clamping plate on the other side of the strip block, and the limit groove and the limit column are arranged correspondingly.

[0017] Preferably, the bar block is also provided with a synchronization component capable of driving the two groups of bar blocks to move synchronously, and the synchronization component includes a synchronization disk, a synchronization rod, a synchronization wheel, a synchronization belt and a linkage block; the synchronization disk is rotatably installed on the side of the bar blocks away from each other, and the synchronization rod is symmetrically hingedly installed on the synchronization disk, and the side of the synchronization rod away from the synchronization disk is hinged to the clamping plates at the upper and lower ends of the bar blocks.

[0018] The synchronous wheels are symmetrically mounted on the clamping frame for rotation along both sides of the length direction of the clamping frame. The synchronous belt is mounted on two synchronous wheels. The linkage blocks are respectively fixedly mounted on the same side of the two bar blocks, and the two linkage blocks are staggered. The two linkage blocks are respectively fixedly connected to the upper and lower parts of the synchronous belt. An active groove is provided on one side of the clamping frame for the synchronous belt to rotate and drive the two bar blocks to slide relative to each other.

[0019] Preferably, the heating assembly includes a heating metal sheet, a heating control block, a wire and a heating power supply; the heating metal sheet is slidably mounted on the inner wall of the detection cylinder, the heating control block is fixedly mounted on the upper end of the heating metal sheet, the wire is connected to the upper end of the heating control block, the heating power supply is snap-connected to a supporting plate, and the end of the wire away from the heating control block is connected to the supporting plate.

[0020] Preferably, the temperature measuring assembly includes a guide rod, a guide block, a thermometer and a temperature measuring spring; the guide rod is hinged and distributed on the outer wall of the detection cylinder at equal intervals along the axial direction of the detection cylinder below the clamp, and the guide rod abuts against the supporting plate below the clamp, the guide block is slidably mounted on the guide rod, and the thermometer is fixedly mounted on the upper end of the guide block through the temperature measuring spring, and one end of the temperature measuring spring is fixedly connected to the thermometer, and the other end is fixedly connected to the guide block.

[0021] Preferably, the guide block is provided with an adjustment unit capable of adjusting the position of the thermometer, and the adjustment unit includes an adjustment threaded rod, an adjustment block, an adjustment rope, a reversing wheel, an actuator block and an actuator tension spring; the adjustment threaded rod is rotatably installed in the detection cylinder below the clamp, the adjustment block is installed on the adjustment threaded rod by a threaded connection, the adjustment rope is fixedly installed on the adjustment block, and the end of the adjustment rope away from the adjustment block slides through the detection cylinder and is fixedly connected to the guide block, the reversing wheel is rotatably installed on the inner wall of the detection cylinder through a support, the actuator block is fixedly installed on the end of the guide rod away from the corresponding detection cylinder, the actuator tension spring is arranged between the actuator block and the guide block, and one end of the actuator tension spring is connected to the guide block, and the other end is connected to the actuator block.

[0022] Preferably, a waterproof detection unit capable of performing a density waterproof test on the graphene heat dissipation film is also provided in the detection cylinder on the supporting plate; the waterproof detection unit comprises a sealing sleeve, a pressing column, a sealing sleeve plate, a pressing rod, a conical column, a reset spring, a linkage needle, a color-changing detection paper, a detection rod and a detection plate; the sealing sleeve is slidably mounted on the inner wall of the detection cylinder, and a sealing slide groove for sliding the sealing sleeve is provided on the detection cylinder, the pressing column is fixedly mounted on the upper surface of the sealing sleeve, and the pressing column extends upward to the outside of the detection cylinder, the sealing sleeve plate is slidably mounted on the inner wall of the sealing sleeve, the pressing rod is fixedly mounted on the sealing sleeve plate, and the pressing rod is slidably arranged in the detection cylinder, and a water source is arranged inside the detection cylinder above the clamp.

[0023] The sealing sleeve plate is provided with a circular hole, and a sealing plug is provided in the circular hole in a threaded connection manner.

[0024] The conical column slides through the sealing sleeve, and the sealing sleeve is provided with a water outlet hole for the conical column to slide open and close. The reset spring is arranged between the conical column and the sealing sleeve, and one end of the reset spring is connected to the conical column and the other end is connected to the inner wall of the sealing sleeve. The linkage needle is fixed to the end of the conical column away from the reset spring.

[0025] The color-changing detection paper is laid in the detection cylinder below the clamp, and a detection plate is slidably installed in the detection cylinder below the clamp, and the detection rod is fixed to an end of the detection plate away from the color-changing detection paper.

[0026] Preferably, an external thread groove is provided on the outer wall of the detection tube, and an internal thread hole for threaded connection of the detection tube is provided on the support plate.

[0027] Preferably, a sealing frame is installed on the heat dissipation test frame, and two groups of symmetrically distributed sealing covers are slidably installed on the sealing frame.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] First, the function of the clamp in the present invention is to achieve stable clamping of the graphene heat dissipation film to prevent the graphene heat dissipation film from moving during the thermal conductivity test of the graphene heat dissipation film; secondly, the clamp can clamp and fix graphene heat dissipation films of different sizes and shapes, which greatly improves the efficiency and applicability of the graphene heat dissipation film detection in this embodiment.

[0030] 2. The tester in the present invention is used to perform different performance tests on the clamped graphene heat dissipation film to ensure the overall performance of the graphene heat dissipation film and to ensure the high quality of the graphene heat dissipation film.

[0031] 3. The detection tube in the present invention is connected to the supporting plate by means of quick installation and quick disassembly, so that the detection tube can be replaced, and each detection tube is provided with equipment for performing different tests on the graphene heat dissipation film. Therefore, the present invention can greatly improve the applicability of graphene heat dissipation film detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0034] Figure 2 It is a structural schematic diagram of the tester of the present invention.

[0035] Figure 3 It is a schematic structural diagram of the clamp of the present invention from a first viewing angle.

[0036] Figure 4 It is a schematic structural diagram of the clamp of the present invention from a second viewing angle.

[0037] Figure 5 It is a schematic structural diagram of the clamp of the present invention from a third viewing angle.

[0038] Figure 6 It is an exploded view of the clamp of the present invention.

[0039] Figure 7 It is a schematic diagram of the structure between the clamp and the synchronization component of the present invention.

[0040] Figure 8 It is a schematic diagram of the structure between the tester and the heating component of the present invention.

[0041] Fig. 9 It is a structural schematic diagram of the heating component of the present invention.

[0042] Fig.10 It is a structural schematic diagram between the temperature measuring component and the regulating unit of the present invention.

[0043] Fig.11 It is a structural schematic diagram of the waterproof detection unit of the present invention.

[0044] Fig.12 It is a structural schematic diagram of the color-changing detection paper, the detection plate and the detection rod of the present invention.

[0045] In the figure, 1, heat dissipation test frame; 2, clamp; 3, tester; 30, bidirectional threaded rod; 31, fixed block; 32, support plate; 33, detection tube; 36, test wheel; 37, linkage belt; 20, placement frame; 21, clamping frame; 22, bar block; 23, fixing nail; 24, clamping plate; 25, clamping compression spring; 4, clamping adjustment unit; 40, telescopic push rod; 41, limit column; 42, limit groove; 5, synchronization component; 50, synchronization disk; 51, synchronization rod; 52, synchronization wheel; 53, synchronization belt; 54, linkage block; 6, heating component; 60, heating metal sheet; 61, heating control block; 62, guide Wire; 63, heating power supply; 7, temperature measuring component; 70, guide rod; 71, guide block; 72, thermometer; 73, temperature measuring spring; 8, adjustment unit; 80, adjustment threaded rod; 81, adjustment block; 82, adjustment rope; 83, reversing wheel; 85, execution block; 84, execution tension spring; 9, waterproof detection unit; 90, sealing sleeve; 91, sealing sleeve plate; 92, pressing rod; 93, color change detection paper; 94, conical column; 95, reset spring; 96, linkage needle; 97, detection plate; 98, detection rod; 99, pressing column; 10, sealing cover; 11, sealing frame; 100, external thread groove; 101, internal thread hole. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-Figure 12 While embodiments of the invention have been described in detail, the invention can be implemented in many different ways as defined and covered by the claims.

[0047] The embodiment of the present application discloses a graphene heat dissipation film testing device, which explains that the graphene heat dissipation film testing device is mainly used in the detection process of the graphene heat dissipation film. In terms of technical effect, it can avoid the problem that the graphene heat dissipation film is affected by the external environment, and ensure that the external factors of each group of test experiments are consistent; especially when the graphene heat dissipation film is heated and the temperature is measured, the existing technology only measures the temperature at one position of the graphene heat dissipation film, and therefore cannot detect the overall thermal conductivity of the entire graphene heat dissipation film after heating.

[0048] Furthermore, the present invention can not only detect the thermal conductivity of the graphene heat dissipation film, but also detect the waterproof performance of the graphene thermal conductive film, and during the detection process, the graphene thermal conductive film can be heat-dissipated by the water source used for the waterproof detection.

[0049] Embodiment 1:

[0050] Reference Figure 1 and Figure 2 As shown, a graphene heat dissipation film testing device includes a heat dissipation test frame 1, on which a clamp 2 for clamping and limiting the graphene heat dissipation film is arranged, and testers 3 for testing the graphene heat dissipation film are arranged at the upper and lower ends of the clamp 2.

[0051] A sealing frame 11 is installed on the heat dissipation test frame 1 , and two groups of symmetrically distributed sealing covers 10 are slidably installed on the sealing frame 11 .

[0052] The function of the clamp 2 is to achieve stable clamping of the graphene heat dissipation film to prevent the graphene heat dissipation film from moving during the thermal conductivity test of the graphene heat dissipation film; secondly, the clamp 2 can clamp and fix graphene heat dissipation films of different sizes and shapes, which greatly improves the efficiency and applicability of the graphene heat dissipation film detection in this embodiment.

[0053] The main purpose of the tester 3 is to perform different performance tests on the clamped graphene heat dissipation film to ensure the overall performance of the graphene heat dissipation film and to ensure the high quality of the graphene heat dissipation film.

[0054] Reference Figure 3 , Figure 4 and Figure 6 As shown, that is, a schematic diagram of the structure for clamping the graphene heat dissipation film in this embodiment; specifically, the clamp 2 includes a placement rack 20, a clamping frame 21, a bar block 22, a fixing pin 23, a clamping plate 24 and a clamping compression spring 25.

[0055] The placement rack 20 is fixedly installed in the middle of the heat dissipation test rack 1, the clamping frame 21 is slidably installed on the inner side of the placement rack 20, and a sliding slot for the clamping frame 21 to slide with is opened in the middle of the placement rack 20, the strip block 22 is symmetrically slidably installed on the inner wall of the clamping frame 21, and the two strip blocks 22 are on the same plane, the fixing nails 23 are arranged at the upper and lower ends of the strip block 22 along both sides of the height direction of the strip block 22, the clamping plate 24 is slidably installed on the fixing nail 23, and the clamping plate 24 is symmetrically distributed on both sides of the strip block 22, the clamping compression spring 25 is arranged between the fixing nail 23 and the clamping plate 24, and one end of the clamping compression spring 25 abuts against the top of the fixing nail 23, and the other end abuts against the upper end of the clamping plate 24, and the clamping compression spring 25 is sleeved on the fixing nail 23.

[0056] The two bar blocks 22 have the same height and are located on the same plane, while the linkage blocks 54 fixed at the side ends of the two bar blocks are staggered.

[0057] It should be noted that the clamping plate 24 is a Z-shaped structure; in the initial state, the clamping plate 24 always approaches the direction of the strip block 22 under the elastic force of the clamping compression spring 25, so the clamping plates 24 at the upper and lower ends of the strip block 22 are close to each other, and one end of the two clamping plates 24 contacts each other.

[0058] When the graphene heat dissipation film needs to be placed on the clamping frame 21, first lift the clamping plate 24 at the upper end of the strip block 22 upward so that the clamping plate 24 at the upper end of the strip block 22 moves upward along the fixing pin 23. At the same time, under the action of the synchronization component 5, the clamping plates 24 below the strip block 22 move synchronously relative to each other, so that the two clamping plates 24 move away from each other. At this time, the operator places the graphene heat dissipation film between the two clamping plates 24, and then releases the clamping plates 24. The two clamping plates 24 are pressed against each other again under the action of the clamping compression spring 25, but at this time the graphene heat dissipation film is clamped by the two clamping plates 24 to ensure that the area of ​​the graphene heat dissipation film to be tested is in a stretched state.

[0059] Reference Figure 6 and Figure 7 As shown, that is, a structural schematic diagram of the present embodiment for further improving the clamping stability of the graphene heat dissipation film; specifically, a clamping adjustment unit 4 for clamping and adjusting graphene heat dissipation films of different sizes is also provided on the clamping frame 21, and the clamping adjustment unit 4 includes a telescopic push rod 40, a limit column 41 and a limit groove 42.

[0060] The telescopic push rod 40 is symmetrically arranged on the inner wall of the clamping frame 21 on both sides along the length direction of the clamping frame 21. The opposite sides of the telescopic push rod 40 have a tendency to approach each other and are fixedly connected to the strip block 22. The limiting column 41 is fixedly installed on the clamping plate 24 on one side of the strip block 22. The limiting groove 42 is opened on the clamping plate 24 on the other side of the strip block 22, and the limiting groove 42 is correspondingly arranged with the limiting column 41.

[0061] It should be noted that the telescopic push rod 40 is a slidable and telescopic structure.

[0062] A limiting column 41 is fixed on the clamping plate 24 on one side, and a limiting groove 42 is provided on the clamping plate 24 on one side. When the graphene heat dissipation film is placed between the two clamping plates 24 and the two clamping plates 24 are closed, the limiting column 41 will squeeze the graphene heat dissipation film so that the graphene heat dissipation film fits in the limiting groove 42. At this time, the two ends of the graphene heat dissipation film are wavy. The main purpose is to increase the contact area between the graphene heat dissipation film and the clamping plate 24, thereby increasing the friction between the two. When the graphene heat dissipation film is tested, it is prevented from being sunken in the middle of the graphene heat dissipation film, which causes the graphene heat dissipation film to fall off from the clamp 2; further improving the clamping stability of the graphene heat dissipation film.

[0063] Look again Figure 6 and Figure 7 As shown, that is, a schematic diagram of the structure for the synchronous movement of the bar blocks 22 in this embodiment; specifically, the bar blocks 22 are also provided with a synchronization component 5 that can drive the two groups of bar blocks 22 to move synchronously, and the synchronization component 5 includes a synchronization disk 50, a synchronization rod 51, a synchronization wheel 52, a synchronization belt 53 and a linkage block 54; the synchronization disk 50 is rotatably installed on the side of the bar blocks 22 away from each other, and the synchronization rod 51 is symmetrically hingedly installed on the synchronization disk 50, and the side of the synchronization rod 51 away from the synchronization disk 50 is hinged to the clamping plates 24 at the upper and lower ends of the bar blocks 22.

[0064] That is, first, the two bar blocks 22 are slidably installed on the inner wall of the clamping frame 21, and a synchronous belt 53 is set on one side of the clamping frame 21; the two bar blocks 22 are respectively connected to the upper and lower sides of the synchronous belt 53 through the linkage blocks 54 (that is, one bar block 22 is connected to the upper half of the synchronous belt 53, and the other bar block 22 is connected to the lower half of the synchronous belt 53). When the bar block 22 on one side moves toward the direction of the graphene heat dissipation film, it will drive the synchronous belt 53 to rotate clockwise. At this time, the bar block 22 on the other side will also synchronously approach the graphene heat dissipation film under the clockwise rotation of the synchronous belt 53, and finally the two bar blocks 22 are realized. With the cooperation of the synchronous belt 53, the two bar blocks 22 can move relative to each other synchronously.

[0065] The synchronous wheels 52 are symmetrically rotated and installed on the clamping frame 21 on both sides of the length direction of the clamping frame 21. The synchronous belt 53 is sleeved and installed on the two synchronous wheels 52. The linkage blocks 54 are respectively fixedly installed on the same side of the two bar blocks 22, and the two linkage blocks 54 are staggered. The two linkage blocks 54 are respectively fixedly connected to the upper and lower parts of the synchronous belt 53. One side of the clamping frame 21 is provided with an active groove for the synchronous belt 53 to rotate and drive the two bar blocks 22 to slide relative to each other.

[0066] Furthermore, in order to clamp graphene heat dissipation films of different sizes and shapes, this embodiment also proposes a telescopic push rod 40 and a synchronization component 5.

[0067] When it is necessary to limit and clamp graphene heat dissipation films of different sizes, move the telescopic push rod 40, and control the movement of the strip block 22 by the telescopic push rod 40 to adjust the distance between the two strip blocks 22. After the graphene heat dissipation film is placed on the two strip blocks 22 and fixed, adjust the spacing between the two strip blocks 22 to make it match the length of the graphene heat dissipation film. In this process, when the telescopic push rod 40 on one side is moved, the corresponding strip block 22 moves synchronously with it. At this time, the synchronous belt 53 fixedly connected to the strip block 22 rotates. With the cooperation of the synchronous belt 53 and the synchronous wheel 52, the two strip blocks 22 always move synchronously with each other.

[0068] Its main purpose is to ensure that the graphene heat dissipation film can always be located in the middle of the clamping frame 21.

[0069] Reference Figure 2 , Fig. 9 and Fig.10 As shown, that is, a structural schematic diagram of the performance test of the clamped graphene heat dissipation film in this embodiment; specifically, the tester 3 includes a bidirectional threaded rod 30, a fixed block 31, a supporting plate 32, a detection tube 33, a heating component 6, a temperature measuring component 7, a test wheel 36 and a linkage belt 37.

[0070] The bidirectional threaded rod 30 is symmetrically rotated and distributed on both sides of the length direction of the heat dissipation test frame 1, and the fixed block 31 is symmetrically threadedly connected to the bidirectional threaded rod 30 along the height direction of the bidirectional threaded rod 30. Its main purpose is to ensure that the two groups of fixed blocks 31 can always move synchronously relative to each other, thereby improving the efficiency of the performance detection of the graphene heat dissipation film; the opposite sides of the fixed blocks 31 at the same height are fixedly connected with a supporting plate 32, and the two supporting plates 32 are symmetrically distributed up and down, and the detection tube 33 is symmetrically arranged on the supporting plate 32 along both sides of the length direction of the supporting plate 32, and the detection tube 33 is installed through the supporting plate 32, the heating component 6 is arranged in the detection tube 33 of the bidirectional threaded rod 30 at the upper end of the heat dissipation test frame 1, and the temperature measuring component 7 is arranged in the detection tube 33 of the bidirectional threaded rod 30 at the upper end of the heat dissipation test frame 1.

[0071] The test wheel 36 is fixedly mounted on the bottom of the two sets of bidirectional threaded rods 30 , and the linkage belt 37 is sleeved on the test wheel 36 mounted on the bottom of the two bidirectional threaded rods 30 .

[0072] During the specific implementation, after the graphene heat dissipation film is fixed on the clamp 2, the bidirectional threaded rod 30 is rotated. With the cooperation of the test wheel 36 and the linkage belt 37, the two groups of bidirectional threaded rods 30 on the heat dissipation test frame 1 rotate synchronously.

[0073] When the bidirectional threaded rod 30 is rotated, the fixed blocks 31 located on the upper and lower sides of the bidirectional threaded rod 30 drive the supporting plates 32 to move relative to each other, driving the two groups of supporting plates 32 to move toward the graphene heat dissipation film until the detection tubes 33 on the upper and lower supporting plates 32 both contact the graphene heat dissipation film.

[0074] At this time, the heating component 6 starts heating. After the heating component 6 runs for a certain period of time, the temperature measuring component 7 starts to measure the temperature of the graphene heat dissipation film in real time, and detects each position of the graphene heat dissipation film to ensure the comprehensiveness of the detection.

[0075] Look again Figure 8 and Fig. 9 As shown, that is, a schematic diagram of the structure for heating the graphene heat dissipation film in this embodiment; specifically, the heating component 6 includes a heating metal sheet 60, a heating control block 61, a wire 62 and a heating power supply 63.

[0076] The heating metal sheet 60 is slidably mounted on the inner wall of the detection tube 33, the heating control block 61 is fixedly mounted on the upper end of the heating metal sheet 60, the wire 62 is connected to the upper end of the heating control block 61, the heating power supply 63 is snap-fitted onto the supporting plate 32, and the end of the wire 62 away from the heating control block 61 is connected to the supporting plate 32.

[0077] In the present embodiment, two groups of detection tubes 33 for heating are arranged on the supporting plate 32 located at the upper end of the graphene heat dissipation film. In the present embodiment, only two groups of detection tubes 33 are arranged, but it is not limited to two groups of detection tubes 33. By arranging two groups of detection tubes 33 to compare the thermal conductivity of the graphene heat dissipation film, the heat dissipation performance of different positions of the graphene heat dissipation film can be intuitively reflected.

[0078] First, the heating power supply 63 is started, and the heating power supply 63 starts the heating control block 61 through the wire 62 to start heating. The heating control block 61 is an existing known structure, which can control the constant and adjustable temperature. In this embodiment, one heating power supply 63 is used to control two heating control blocks 61 to ensure that the two heating control blocks 61 start and stop synchronously, thereby ensuring the consistency of temperature regulation of the heating control block 61.

[0079] When the heating control block 61 is started, the heat is conducted to the heating metal sheet 60. After the heating metal sheet 60 is heated, the operator pushes it toward the graphene heat dissipation film until the graphene heat dissipation film contacts the heating metal sheet 60. At this time, the heat is conducted from the heating metal sheet 60 to the graphene heat dissipation film. At this time, the graphene heat dissipation film can diffuse the heat to achieve rapid heat dispersion.

[0080] Reference Fig.10 As shown, that is, a structural schematic diagram of the performance test of the heated graphene heat dissipation film in this embodiment; specifically, the temperature measuring component 7 includes a guide rod 70, a guide block 71, a thermometer 72 and a temperature measuring spring 73; the guide rod 70 is hingedly distributed on the outer wall of the detection cylinder 33 at equal intervals along the axial direction of the detection cylinder 33 below the clamp 2, and the guide rod 70 is against the supporting plate 32 below the clamp 2, the guide block 71 is slidably installed on the guide rod 70, and the thermometer 72 is fixedly installed on the upper end of the guide block 71 through the temperature measuring spring 73, and one end of the temperature measuring spring 73 is fixedly connected to the thermometer 72, and the other end is fixedly connected to the guide block 71.

[0081] The guide rod 70 is hingedly mounted on the side wall of the detection tube 33, so that the guide rod 70 can be disassembled integrally with the detection tube 33. The guide rod 70 is connected to the supporting plate 32 by gluing to prevent it from shaking.

[0082] When the graphene heat dissipation film is rapidly conducting and dissipating the heat emitted by the heating control block 61, the thermometer 72 rests against the bottom of the graphene heat dissipation film to detect the temperature of the graphene heat dissipation film in real time, ensuring that the entire process of the graphene heat dissipation film dissipating the heat and the entire temperature changes during this process are recorded.

[0083] Secondly, in this embodiment, the thermometers 72 are evenly spaced and distributed on the outer wall of the graphene heat dissipation film with the center of the heating metal sheet 60 as the axis point. Therefore, the heat conduction of the graphene heat dissipation film is monitored by multiple groups of thermometers 72, thereby realizing multi-directional temperature monitoring on the graphene heat dissipation film, providing a large amount of data for the heat dissipation performance detection of the graphene heat dissipation film, and ensuring the accuracy of the heat dissipation data of the graphene heat dissipation film.

[0084] In this embodiment, the entire device needs to be assisted by a numerical control system. The thermometer 72 is connected to the numerical control system and the numerical control screen through wires. The temperature measured by the thermometer 72 is displayed through the numerical control screen, and the data measured by the thermometer 72 is obtained through the numerical control system.

[0085] Look again Fig.10As shown, that is, a schematic diagram of the structure for adjusting the position of the thermometer 72 in this embodiment; specifically, the guide block 71 is provided with an adjusting unit 8 capable of adjusting the position of the thermometer 72, and the guide block 71 is provided with an adjusting unit 8 capable of adjusting the position of the thermometer 72, and the adjusting unit 8 includes an adjusting threaded rod 80, an adjusting block 81, an adjusting rope 82, a reversing wheel 83, an execution block 85 and an execution tension spring 84; the adjusting threaded rod 80 is rotatably installed in the clamping cylinder below the clamp 2, and the adjusting block 81 is installed by threaded connection. On the adjusting threaded rod 80, the adjusting rope 82 is fixedly mounted on the adjusting block 81, and the end of the adjusting rope 82 away from the adjusting block 81 slides through the detection cylinder 33 and is fixedly connected to the guide block 71. The reversing wheel 83 is rotatably mounted on the inner wall of the detection cylinder 33 through a support. The execution block 85 is fixedly mounted on the end of the guide rod 70 away from the corresponding detection cylinder 33. The execution tension spring 84 is arranged between the execution block 85 and the guide block 71, and one end of the execution tension spring 84 is connected to the guide block 71, and the other end is connected to the execution block 85.

[0086] The guide block 71 slides on the guide rod 70 , and in the initial state, the actuator spring 84 pulls the guide block 71 , so that the guide block 71 is close to one end of the actuator block 85 .

[0087] In the above description, although multiple groups of thermometers 72 are arranged around the heat source, the heat dissipation performance of the graphene heat dissipation film cannot be reflected at different distances from the heat source. Therefore, this embodiment can also adjust the position of the thermometer 72 to improve the diversity of detection.

[0088] The adjusting threaded rod 80 is rotated, and the adjusting threaded rod 80 drives the adjusting block 81 to move. During the movement, the adjusting block 81 controls the position of the thermometer 72 through the adjusting rope 82.

[0089] In the initial state, the guide block 71 is located at the end away from the detection cylinder 33 and the tension spring 84 is executed to squeeze the guide block 71. When the adjusting threaded rod 80 is rotated, the guide block 71 is pulled toward the detection cylinder 33 through the adjusting rope 82, thereby adjusting the distance of the guide block 71. The thermometer 72 is arranged on the guide block 71, and finally the position of the thermometer 72 is adjusted.

[0090] When the adjusting threaded rod 80 rotates clockwise, the adjusting block 81 moves toward the direction close to the graphene heat dissipation film. At this time, the guide block 71 is controlled to move toward the direction away from the heat source, and the thermometer 72 can monitor the temperature of the graphene heat dissipation film at a position away from the heat source; when the adjusting threaded rod 80 rotates counterclockwise, the adjusting block 81 moves toward the direction away from the graphene heat dissipation film. At this time, the thermometer 72 can monitor the temperature of the graphene heat dissipation film close to the heat source.

[0091] Embodiment 2:

[0092] Reference Fig.10 and Fig.11 As shown, on the basis of the first embodiment, in order to further improve the diversity of the graphene heat dissipation film test, this embodiment further proposes a waterproof detection unit 9; specifically, a waterproof detection unit 9 capable of performing a density waterproof test on the graphene heat dissipation film is further provided in the detection cylinder 33 on the supporting plate 32.

[0093] The waterproof detection unit 9 includes a sealing sleeve 90 , a pressing column 99 , a sealing sleeve plate 91 , a pressing rod 92 , a conical column 94 , a return spring 95 , a linkage needle 96 , a color-changing detection paper 93 , a detection rod 98 and a detection plate 97 .

[0094] The sealing sleeve 90 is slidably mounted on the inner wall of the detection cylinder 33, and a sealing groove for the sealing sleeve 90 to slide is provided on the detection cylinder 33. The pressing column 99 is fixedly mounted on the upper surface of the sealing sleeve 90, and the pressing column 99 extends upward to the outside of the detection cylinder 33. The sealing sleeve plate 91 is slidably mounted on the inner wall of the sealing sleeve 90. The pressing rod 92 is fixedly mounted on the sealing sleeve plate 91, and the pressing rod 92 is slidably arranged in the detection cylinder 33. A water source is arranged inside the detection cylinder 33 above the clamp 2.

[0095] A circular hole is formed on the sealing sleeve 91, and a sealing plug is provided in the circular hole by means of threaded connection.

[0096] In the initial state, the conical column 94 abuts against the water outlet hole on the sealing sleeve 90 through the return spring 95 to block the water outlet hole.

[0097] Secondly, there is no water source in the sealing sleeve 90 in the initial state, the sealing plug can be opened, and then the water source is injected into the space between the sealing sleeve 90 and the sealing sleeve plate 91, and then the sealing plug is re-locked into the circular hole opened on the sealing sleeve plate 91.

[0098] The conical column 94 slides through the sealing sleeve 90, and a water outlet hole is provided on the sealing sleeve 90 for the conical column 94 to slide open and close. The reset spring 95 is arranged between the conical column 94 and the sealing sleeve 90, and one end of the reset spring 95 is connected to the conical column 94 and the other end is connected to the inner wall of the sealing sleeve 90. The linkage needle 96 is fixed at one end of the conical column 94 away from the reset spring 95.

[0099] Reference Fig.12 As shown, the color change detection paper 93 is laid in the detection tube 33 below the clamp 2, and a detection plate 97 is slidably installed in the detection tube 33 below the clamp 2, and a detection rod 98 is fixed to the end of the detection plate 97 away from the color change detection paper 93.

[0100] After the heat dissipation performance of the graphene heat dissipation film is tested, the waterproof performance of the graphene heat dissipation film can be tested. At this time, after the heat dissipation performance of the graphene heat dissipation film is tested, the graphene heat dissipation film body has a certain temperature. Then, the pressing column 99 is held to drive the entire sealing sleeve 90 to move downward. At this time, the bottom of the sealing sleeve 90 is extremely close to the graphene heat dissipation film body; its main purpose is to facilitate the movement of the sealing sleeve 90.

[0101] During this process, when the linkage needle 96 touches the graphene heat dissipation film body downward, it is hindered by the graphene heat dissipation film and moves upward, and pushes open the conical column 94 until the conical column 94 fixedly connected to the upper end of the linkage needle 96 is separated from the water outlet on the sealing sleeve 90. At this time, the pressing rod 92 can be pushed, and the sealing sleeve plate 91 can be pushed downward by the pressing rod 92, so that the water stored in the sealing sleeve 90 flows out from the water outlet and enters the upper end of the graphene heat dissipation film.

[0102] Then, within a certain period of time, the water source contacts the upper end of the graphene heat dissipation film, and the color-changing detection paper 93 is attached to the lower end of the graphene heat dissipation film, and the position of the color-changing detection paper 93 corresponds to the position of the water source. If the color-changing detection paper 93 changes color, it means that the graphene heat dissipation film is leaking; if the color-changing detection paper 93 does not change color, it means that the graphene heat dissipation film is not leaking; finally, the waterproof detection of the graphene heat dissipation film is achieved.

[0103] In order to further improve the efficiency of detection, this embodiment also proposes a modular and detachable method to ensure the diversity of graphene heat dissipation film detection.

[0104] Reference Fig.11 and Fig.12 As shown, an external thread groove 100 is provided on the outer wall of the detection tube 33, and an internal thread hole 101 for threaded connection of the detection tube 33 is provided on the support plate 32. The direction of the thread hole of the support plate 32 above the clamp 2 is opposite to the direction of the thread hole of the support plate 32 below the clamp 2.

[0105] The internal threaded hole 101 provided on the supporting plate 32 in the present embodiment can be used to install the detection tube 33 by rotation. When it is necessary to detect different properties of the graphene heat dissipation film, the corresponding detection tube 33 can be replaced to ensure the detection efficiency of the graphene heat dissipation film. In the above, not only the heat dissipation performance of the graphene heat dissipation film can be detected, but also the waterproof performance of the graphene heat dissipation film can be detected by replacing the detection tube 33, which greatly improves the applicability of the entire detection equipment.

[0106] During operation: Step 1: First, lift the clamping plate 24 at the upper end of the strip block 22 upwards so that the two clamping plates 24 move away from each other. At this time, place the graphene heat dissipation film between the two clamping plates 24, and then release the clamping plate 24. The two clamping plates 24 are pressed against each other again under the action of the clamping pressure spring 25. However, at this time, the graphene heat dissipation film is clamped by the two clamping plates 24 to ensure that the area of ​​the graphene heat dissipation film to be tested is in a stretched state.

[0107] Step 2: When it is necessary to limit and clamp the graphene heat dissipation films of different sizes, move the telescopic push rod 40 to control the movement of the bar block 22 to adjust the distance between the two bar blocks 22. With the cooperation of the synchronous belt 53 and the synchronous wheel 52, the two bar blocks 22 always move synchronously relative to each other.

[0108] Step 3: After the graphene heat dissipation film is fixed on the clamp 2, rotate the bidirectional threaded rod 30, and the fixing blocks 31 located on the upper and lower sides of the bidirectional threaded rod 30 drive the supporting plates 32 to move relative to each other, driving the two groups of supporting plates 32 to move toward the graphene heat dissipation film until the detection tubes 33 on the upper and lower supporting plates 32 both contact the graphene heat dissipation film.

[0109] Step 4: After the heating control block 61 is started, the heat is transferred to the heating metal sheet 60. After the heating metal sheet 60 is heated, the operator pushes it toward the graphene heat dissipation film until the graphene heat dissipation film contacts the heating metal sheet 60. At this time, the heat is transferred from the heating metal sheet 60 to the graphene heat dissipation film.

[0110] Step 5: Then the thermometer 72 starts to measure the temperature of the graphene heat dissipation film in real time, and detects each position of the graphene heat dissipation film to ensure the comprehensiveness of the detection.

[0111] Step 6: After the heat dissipation performance of the graphene heat dissipation film is tested, the waterproof performance of the graphene heat dissipation film can be tested. At this time, after the heat dissipation performance of the graphene heat dissipation film is tested, the graphene heat dissipation film body has a certain temperature. At this time, the pressing rod 92 can be pushed, and the sealing sleeve 91 is pushed toward the graphene heat dissipation film through the pressing rod 92. In this process, the linkage needle 96 is against the graphene heat dissipation film, and then the conical column 94 moves to open the water outlet, and then the pressing rod 92 is pushed to squeeze the water source onto the conical column 94, and the water source is located in the detection tube 33, and no leakage will occur. Then, the graphene heat dissipation film is tested for waterproofness within a certain period of time.

[0112] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended that all changes within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0113] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A graphene heat dissipation film testing device, comprising a heat dissipation testing frame (1), characterized in that: The heat dissipation test frame (1) is provided with a clamp (2) for clamping and limiting the graphene heat dissipation film, and the upper and lower ends of the clamp (2) are both provided with testers (3) for testing the graphene heat dissipation film; The tester (3) comprises a bidirectional threaded rod (30), a fixing block (31), a supporting plate (32), a detection tube (33), a heating component (6), a temperature measuring component (7), a test wheel (36) and a linkage belt (37); the bidirectional threaded rod (30) is symmetrically rotatably distributed on both sides of the heat dissipation test frame (1) in the length direction; the fixing block (31) is symmetrically threadedly connected to the bidirectional threaded rod (30) along the height direction of the bidirectional threaded rod (30); opposite sides of the two fixing blocks (31) at the same height are fixed to each other. A support plate (32) is fixedly connected, the two support plates (32) are symmetrically distributed up and down, the detection tube (33) is symmetrically movably arranged on the support plate (32) along both sides of the length direction of the support plate (32), and the detection tube (33) penetrates the support plate (32) for installation, the heating component (6) is arranged in the detection tube (33) at the upper end of the bidirectional threaded rod (30) located on the heat dissipation test frame (1), and the temperature measurement component (7) is arranged in the detection tube (33) at the upper end of the bidirectional threaded rod (30) located on the heat dissipation test frame (1); The test wheel (36) is fixedly mounted on the bottom of the two sets of bidirectional threaded rods (30), and the linkage belt (37) is sleeved and mounted on the test wheel (36) at the bottom of the two bidirectional threaded rods (30); The clamp (2) comprises a placement rack (20), a clamping frame (21), a strip block (22), a fixing pin (23), a clamping plate (24) and a clamping compression spring (25); the placement rack (20) is fixedly mounted in the middle of the heat dissipation test rack (1); the clamping frame (21) is slidably mounted on the inner side of the placement rack (20); a sliding slot for the clamping frame (21) to slidably cooperate with is provided in the middle of the placement rack (20); the strip block (22) is symmetrically slidably mounted on the inner wall of the clamping frame (21); and the two strip blocks (22) are on the same plane. The fixing nail (23) is arranged at the upper and lower ends of the strip block (22) along both sides of the strip block (22) in the height direction, the clamping plate (24) is slidably mounted on the fixing nail (23), and the clamping plate (24) is symmetrically distributed on both sides of the strip block (22) in the upper and lower directions, the clamping compression spring (25) is arranged between the fixing nail (23) and the clamping plate (24), and one end of the clamping compression spring (25) abuts against the top of the fixing nail (23) and the other end abuts against the upper end of the clamping plate (24), and the clamping compression spring (25) is sleeved on the fixing nail (23); The clamping frame (21) is also provided with a clamping adjustment unit (4) for clamping graphene heat dissipation films of different sizes, and the clamping adjustment unit (4) comprises a telescopic push rod (40), a limiting column (41) and a limiting groove (42); the telescopic push rod (40) is symmetrically arranged on the inner wall of the clamping frame (21) on both sides along the length direction of the clamping frame (21), and the opposite side of the telescopic push rod (40) has a tendency to approach each other and is fixedly connected to the strip block (22), the limiting column (41) is fixedly mounted on the clamping plate (24) on one side of the strip block (22), and the limiting groove (42) is opened on the clamping plate (24) on the other side of the strip block (22), and the limiting groove (42) and the limiting column (41) are arranged correspondingly.

2. A graphene heat dissipation film testing device according to claim 1, characterized in that: The bar block (22) is also provided with a synchronization component (5) capable of driving the two groups of bar blocks (22) to move synchronously, the synchronization component (5) comprising a synchronization disk (50), a synchronization rod (51), a synchronization wheel (52), a synchronization belt (53) and a linkage block (54); the synchronization disk (50) is rotatably mounted on a side of the bar block (22) away from each other, the synchronization rod (51) is symmetrically hingedly mounted on the synchronization disk (50), and the side of the synchronization rod (51) away from the synchronization disk (50) is hingedly connected to the clamping plates (24) at the upper and lower ends of the bar block (22); The synchronous wheels (52) are symmetrically mounted on the clamping frame (21) along the length direction of the clamping frame (21) so as to rotate. The synchronous belt (53) is sleeved on the two synchronous wheels (52). The linkage blocks (54) are respectively fixedly mounted on the same side of the two bar blocks (22). The two linkage blocks (54) are staggered. The two linkage blocks (54) are respectively fixedly connected to the upper and lower parts of the synchronous belt (53). One side of the clamping frame (21) is provided with an active groove for the synchronous belt (53) to rotate and drive the two bar blocks (22) to slide relative to each other.

3. A graphene heat dissipation film testing device according to claim 1, characterized in that: The heating assembly (6) comprises a heating metal sheet (60), a heating control block (61), a wire (62) and a heating power source (63); the heating metal sheet (60) is slidably mounted on the inner wall of the detection cylinder (33); the heating control block (61) is fixedly mounted on the upper end of the heating metal sheet (60); the wire (62) is connected to the upper end of the heating control block (61); the heating power source (63) is clamped and arranged on the supporting plate (32); and one end of the wire (62) away from the heating control block (61) is connected to the supporting plate (32).

4. A graphene heat dissipation film testing device according to claim 1, characterized in that: The temperature measuring assembly (7) comprises a guide rod (70), a guide block (71), a thermometer (72) and a temperature measuring spring (73); the guide rod (70) is hingedly distributed on the outer wall of the detection cylinder (33) at equal intervals along the axial direction of the detection cylinder (33) below the clamp (2), and the guide rod (70) abuts against the supporting plate (32) below the clamp (2); the guide block (71) is slidably mounted on the guide rod (70), and the thermometer (72) is fixedly mounted on the upper end of the guide block (71) via the temperature measuring spring (73), and one end of the temperature measuring spring (73) is fixedly connected to the thermometer (72), and the other end is fixedly connected to the guide block (71).

5. A graphene heat dissipation film testing device according to claim 4, characterized in that: The guide block (71) is provided with an adjustment unit (8) capable of adjusting the position of the thermometer (72), and the adjustment unit (8) comprises an adjustment threaded rod (80), an adjustment block (81), an adjustment rope (82), a reversing wheel (83), an execution block (85), and an execution tension spring (84); the adjustment threaded rod (80) is rotatably mounted in the detection cylinder (33) below the clamp (2), the adjustment block (81) is mounted on the adjustment threaded rod (80) by means of a threaded connection, and the adjustment rope (82) is fixedly mounted on the adjustment block (81). ), and the end of the adjusting rope (82) away from the adjusting block (81) slides through the detection cylinder (33) and is fixedly connected to the guide block (71); the reversing wheel (83) is rotatably mounted on the inner wall of the detection cylinder (33) through a support; the executing block (85) is fixedly mounted on the end of the guide rod (70) away from the corresponding detection cylinder (33); the executing tension spring (84) is arranged between the executing block (85) and the guide block (71); one end of the executing tension spring (84) is connected to the guide block (71) and the other end is connected to the executing block (85).

6. A graphene heat dissipation film testing device according to claim 1, characterized in that: A waterproof detection unit (9) capable of performing a density waterproof test on the graphene heat dissipation film is also provided in the detection cylinder (33) on the support plate (32); The waterproof detection unit (9) comprises a sealing sleeve (90), a pressing column (99), a sealing sleeve plate (91), a pressing rod (92), a conical column (94), a return spring (95), a linkage needle (96), a color-changing detection paper (93), a detection rod (98) and a detection plate (97); The sealing sleeve (90) is slidably mounted on the inner wall of the detection tube (33), and a sealing groove for sliding the sealing sleeve (90) is provided on the detection tube (33); the pressing column (99) is fixedly mounted on the upper surface of the sealing sleeve (90), and the pressing column (99) extends upward to the outside of the detection tube (33); the sealing sleeve plate (91) is slidably mounted on the inner wall of the sealing sleeve (90); the pressing rod (92) is fixedly mounted on the sealing sleeve plate (91), and the pressing rod (92) is slidably arranged in the detection tube (33); and a water source is arranged inside the detection tube (33) above the clamp (2); The sealing sleeve (91) is provided with a circular hole, and a sealing plug is provided in the circular hole by means of a threaded connection; The conical column (94) slides through the sealing sleeve (90), and the sealing sleeve (90) is provided with a water outlet hole for the conical column (94) to slide open and close. The return spring (95) is arranged between the conical column (94) and the sealing sleeve (90), and one end of the return spring (95) is connected to the conical column (94) and the other end is connected to the inner wall of the sealing sleeve (90). The linkage needle (96) is fixed to the end of the conical column (94) away from the return spring (95); The color-changing detection paper (93) is laid in the detection cylinder (33) below the holder (2), and a detection plate (97) is slidably installed in the detection cylinder (33) below the holder (2), and the detection rod (98) is fixed to an end of the detection plate (97) away from the color-changing detection paper (93).

7. The graphene heat dissipation film testing device according to claim 1, characterized in that: An external thread groove (100) is provided on the outer wall of the detection cylinder (33), and an internal thread hole (101) for threaded connection of the detection cylinder (33) is provided on the support plate (32).

8. The graphene heat dissipation film testing device according to claim 1, characterized in that: A sealing frame (11) is installed on the heat dissipation test frame (1), and two groups of symmetrically distributed sealing covers (10) are slidably installed on the sealing frame (11).

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