CN117388312B - Testing device and testing method for graphene heat conduction film - Google Patents
Testing device and testing method for graphene heat conduction film Download PDFInfo
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- CN117388312B CN117388312B CN202311647498.6A CN202311647498A CN117388312B CN 117388312 B CN117388312 B CN 117388312B CN 202311647498 A CN202311647498 A CN 202311647498A CN 117388312 B CN117388312 B CN 117388312B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 92
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000009413 insulation Methods 0.000 claims description 120
- 230000007246 mechanism Effects 0.000 claims description 72
- 229910002804 graphite Inorganic materials 0.000 claims description 30
- 239000010439 graphite Substances 0.000 claims description 30
- -1 graphite alkene Chemical class 0.000 claims description 30
- 238000004804 winding Methods 0.000 claims description 23
- 238000009423 ventilation Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 19
- 238000005485 electric heating Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000011056 performance test Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention belongs to the technical field of film testing, and particularly relates to a testing device and a testing method for a graphene heat-conducting film. According to the invention, the thermal conductivity and the puncture resistance of the graphene thermal conductive film can be tested, the accuracy of a measurement result can be improved, the testing range of the graphene thermal conductive film can be improved, the influence of external temperature on the thermal conductivity of the graphene thermal conductive film can be avoided, and the personnel can conveniently and rapidly judge the thermal conductivity of the graphene thermal conductive film.
Description
Technical Field
The invention belongs to the technical field of film testing, and particularly relates to a testing device and a testing method for a graphene heat-conducting film.
Background
The graphene heat-conducting film is a film-shaped material, is composed of single-layer or multi-layer graphene fragments, has excellent heat-conducting performance and mechanical strength, and is applied to multiple fields of electronic equipment heat dissipation, photoelectric devices, heat management and the like, and in order to ensure the output quality of the graphene heat-conducting film, performance test is required to be carried out on the graphene heat-conducting film.
At present, after the graphene heat-conducting film is produced, the heat-conducting performance of the graphene heat-conducting film needs to be tested, so that the heat-conducting performance of the graphene film can meet the actual use requirements, and a plurality of testing methods of the graphene heat-conducting film exist, such as a testing method of the graphene heat-conducting film disclosed in patent publication No. CN 110887864A;
when the graphene heat conducting film is prepared, the thermal gradient effect exists, the heat conducting performance of different positions may have different degrees, for example, in the graphene heat conducting film prepared by a common CVD method, the thermal gradient effect may cause higher heat conductivity at the boundary of the film, the heat conductivity at the center is lower, the graphene heat conducting film is tiled, then fixed-point heating is selected, different points are selected for temperature measurement, although the heat conducting performance of the graphene heat conducting film can be tested, the distances between two temperature measuring points and the heating point are different, when the temperature is measured, part of heat can be dissipated through air to influence the measurement precision, and secondly, the temperature measuring performance of thermocouples per se of the two temperature measuring points also has the difference, so that the measurement precision is also influenced, moreover, the measurement of the graphene heat conducting film sample cannot be comprehensively carried out, if the number of the selected points is increased, the measurement precision error is superposed, and the finally obtained measurement result is larger in deviation.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for a graphene heat conduction film.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a testing arrangement of graphite alkene heat conduction film, includes the insulation box, insulation box's inner wall fixed mounting has heat conduction insulation winding cover, and insulation box's internally mounted has rotatory detection mechanism, rotatory detection mechanism is used for detecting the heat conduction of graphite alkene heat conduction film, insulation box's inside upside is provided with fixture, and fixture is used for compressing tightly the centre gripping to graphite alkene heat conduction film, insulation box's lateral wall has seted up the operating window corresponding with fixture position, temperature control mechanism is installed to insulation box's inner wall, temperature control mechanism is used for regulating and controlling the inside temperature of insulation box, insulation box's lateral wall installs the ventilation mechanism that is linked together with temperature control mechanism, and insulation box's lateral wall installs the top thorn mechanism that is linked together with the ventilation blower mechanism, top thorn mechanism is used for carrying out anti-puncture detection to graphite alkene heat conduction film, insulation box's lateral wall installs the instruction mechanism that is linked together with the ventilation blower mechanism, the instruction mechanism is used for showing the result that detects, insulation box's box mouth department articulates has sealed chamber door, and insulation box's operating window department articulates has sealed door, and insulation box's operating window department is articulated to have sealed outside of sealed container, the sealed container is fixed mounting;
the rotation detection mechanism comprises a thermistor rod arranged in the heat-conducting insulating winding sleeve, the side wall of the thermistor rod is in contact with the inner wall of the heat-conducting insulating winding sleeve, a heat insulation strip is arranged on the outer side of the heat-conducting insulating winding sleeve, an electric heating strip is fixedly inserted into the side wall of the heat insulation strip, an electromagnetic switch electrically connected with the thermistor rod is fixedly arranged on the inner wall of the heat insulation box, and a driving assembly is arranged on the side wall of the heat insulation box and used for rotationally driving the heat insulation strip and the thermistor rod;
the indicating mechanism comprises a mounting plate fixedly arranged on the outer side wall of the heat insulation box, a lamp holder is fixedly arranged on the side wall of the mounting plate, a plurality of LED indicating lamps are arranged on the side wall of the lamp holder, an air cavity is formed in the mounting plate, a pushing piston is slidably arranged in the air cavity, a plurality of grooves are formed in the cavity wall of the air cavity, first pressure switches electrically connected with the corresponding LED indicating lamps are arranged in the grooves, flexible films are packaged in the grooves of the grooves, hard pressing sheets are fixedly arranged on the side wall of the flexible films, a shunt pipe is fixedly connected with the air cavity and the air pipe in a plugging mode, a third normally closed electromagnetic valve is arranged in the shunt pipe, the electromagnetic switch is electrically connected with the third normally closed electromagnetic valve through a controller, and an exhaust hole is formed in the cavity wall of the air cavity;
the driving assembly comprises an insulating rotating plate and an insulating movable plate, wherein the insulating rotating plate and the insulating movable plate are arranged inside the insulating box, the positions of the insulating rotating plate and the insulating movable plate are opposite, the thermistor rod is fixedly arranged on the side wall of the insulating rotating plate, the insulating strip is fixedly arranged on the side wall of the insulating movable plate, the thermistor rod and the insulating strip are opposite, the side wall of the insulating box is provided with a self-locking motor, the output end of the self-locking motor is rotationally connected with the side wall of the insulating box, the insulating rotating plate is fixedly arranged at the output end of the self-locking motor, the self-locking motor is electrically connected with the controller, and the insulating movable plate and the insulating rotating plate are jointly provided with a threaded locking assembly.
Preferably, the fixture includes two electric putter of fixed grafting in insulation can top, and two electric putter all with controller electric connection, two equal fixed mounting of output of electric putter has the pressure strip, two the below of pressure strip all is provided with the fixed plate, and two fixed plates all are located insulation can's inside fixed mounting.
Preferably, the temperature control mechanism comprises a hood fixedly arranged in the heat insulation box, a plurality of ventilation holes are formed in the side wall of the hood, an electric heater and a refrigerator are fixedly installed in the hood, the hot end of the refrigerator penetrates through the hood and the side wall of the heat insulation box, a temperature controller electrically connected with the electric heater and the refrigerator is fixedly installed on the inner top of the heat insulation box, and the temperature controller is electrically connected with the controller.
Preferably, the ventilation mechanism comprises an air pump fixedly mounted on the outer side wall of the heat insulation box, an air pipe is fixedly mounted at the output end of the air pump and communicated with the hood, an exhaust pipe is fixedly inserted at the top of the heat insulation box, a first normally closed electromagnetic valve is mounted in the exhaust pipe, and the first normally closed electromagnetic valve is electrically connected with the controller.
Preferably, the jacking mechanism comprises a boss fixedly inserted at the top of the heat insulation box, a plurality of cylindrical cavities and a strip-shaped cavity are formed in the boss, each cylindrical cavity is communicated with the strip-shaped cavity, a jacking piston is slidably arranged in each cylindrical cavity, a group of sliding rods are fixedly arranged at the bottom of each jacking piston, the rod walls of the sliding rods are slidably connected with the bottom of the cylindrical cavity, two same groups of sliding rods are fixedly arranged on the rod walls of the sliding rods, movable blocks are fixedly inserted at the tops of the movable blocks, conical spines are fixedly inserted at the tops of the movable blocks, communicating pipes are fixedly inserted at the pipe walls of the strip-shaped cavities and the same side cylindrical cavities, a second normally-closed electromagnetic valve is arranged in the communicating pipes, a first normally-open electromagnetic valve is arranged in the inner part of each gas transmission pipe, a gas outlet pipe is fixedly inserted at the cavity wall of each strip-shaped cavity, a second normally-open electromagnetic valve is arranged in the inner part of each gas outlet pipe, and the second normally-open electromagnetic valve, the first normally-open electromagnetic valve and the second normally-open electromagnetic valve are electrically connected with the controller.
Preferably, the second pressure switch is fixedly arranged at the position, below the same-side jacking piston, of the inner part of each cylindrical cavity, the LED indicator lamps are fixedly arranged on the outer side wall of the heat insulation box, each LED indicator lamp is electrically connected with the corresponding second pressure switch, and whistle is arranged at the pipe end of the air outlet pipe.
Preferably, a round hole is formed in the cavity wall of the air cavity, a plug is mounted in the round hole, and a connecting rope is mounted in the plug and the extruding piston together.
A testing method of a testing device of a graphene heat-conducting film comprises the following steps:
s1, opening a sealing box door, then tightly winding a graphene heat-conducting film sample on a heat-conducting insulating winding sleeve, placing one end of the graphene heat-conducting film sample on two fixing plates, and then pressing a clamping button on a controller, wherein at the moment, two electric push rods drive a pressing plate to move downwards and press and fix the graphene heat-conducting film;
s2, screwing bolts of the thread locking assembly to enable the side walls of the heat insulation strips and the electric heating strips to be in contact with the side walls of the graphene heat conduction films;
s3, pressing a temperature control button on the controller, wherein the air pump, the first normally closed electromagnetic valve and the temperature controller work for 2 minutes at regular time, and the temperature controller controls the electric heater and the refrigerator to work, so that the temperature inside the heat insulation box can be stabilized at 25+/-1 ℃;
s4, after the timing work of the air pump and the temperature controller is finished, the controller controls the electric heating strip to work for 5 seconds at fixed time, and synchronously supplies power to a connecting loop of the thermistor rod and the electromagnetic switch for 5 seconds at fixed time;
s5, after 5 seconds after the step S4 is finished, the controller controls the air pump and the temperature controller to repeat the step S3, so that the temperature of the heat insulation box is stabilized at 25+/-1 ℃, meanwhile, the controller controls the self-locking motor to work for 5 seconds at fixed time, and then, the controller controls the electric heating strip, the thermistor rod and the electromagnetic switch to repeat the step S4 until the heat conduction performance test of the graphene heat conduction film is completed;
s6, a person observes whether all the LED indicator lamps are lighted, if no LED indicator lamp is lighted, the graphene heat conduction film is good in heat conduction performance, and if the LED indicator lamps are lighted, the more the LED indicator lamps are lighted, the worse the heat conduction performance of the graphene heat conduction film is indicated;
s7, after the step S6 is finished, opening the sealing window cover, and pressing a puncture button on the controller, wherein the controller controls the air pump, the first normally-open electromagnetic valve, the second normally-closed electromagnetic valve and the second normally-open electromagnetic valve to work for 30 seconds at regular time;
s8, observing whether the LED prompt lamp is lighted, if so, indicating that the graphene heat-conducting film is pierced, and if not, indicating that the graphene heat-conducting film is relatively good in piercing resistance;
s9, after hearing the sound of the whistle, pressing a clamping button on the controller, at the moment, the electric push rod drives the pressing plate to move upwards to be separated from the graphene heat conduction film, then, a person pulls the graphene heat conduction film outwards through the operation window, if the person wants to detect the puncture resistance of the graphene heat conduction film at multiple points, the person stops pulling the graphene heat conduction film, presses the clamping button on the controller again, and presses the puncture button on the controller again after the pressing plate presses and fixes the graphene heat conduction film.
Compared with the prior art, the testing device and the testing method for the graphene heat conduction film have the advantages that:
1. through the check case that sets up, the insulating winding cover of heat conduction, rotatory detection mechanism, fixture, operating window and controller mutually support, when carrying out the heat conductivility test of graphite alkene heat conduction film, can make a test point through rotatory mode of stacking, a plurality of positions on the graphite alkene heat conduction film can be measured simultaneously, consequently, under the test of the selective point of same quantity, can greatly increased to the test coverage of graphite alkene heat conduction film, and can reduce the influence of air to measurement accuracy, simultaneously, only need a temperature measuring element, there is not the condition that temperature measuring element difference influences measurement accuracy, both can improve measuring result's precision, can improve the test range to graphite alkene heat conduction film again.
2. Through the mutually supporting of control by temperature change mechanism and ventilation mechanism that sets up, can be when carrying out the heat conduction test of graphite alkene heat conduction film, to the inside thermostatic control that carries out of insulation box, avoid outside temperature to influence the heat conductivility to graphite alkene heat conduction film to can ensure the accuracy to the heat conductivility test of graphite alkene heat conduction film.
3. Through the penetrating mechanism that sets up, can be after the heat conductivility test of graphite alkene heat conduction film is accomplished, test the puncture resistance performance of graphite alkene heat conduction film, and can utilize the ventilation mechanism to the inside temperature regulation and control of insulation can, assist to carry out the puncture resistance test to graphite alkene heat conduction film, through the indicating mechanism that sets up, can utilize the ventilation mechanism to the inside temperature regulation and control of insulation can, show the heat conduction result of graphite alkene heat conduction film, thereby can be convenient for personnel judge the heat conductivility of graphite alkene heat conduction film fast.
Drawings
Fig. 1 is a schematic structural diagram of a testing device and a testing method for graphene heat conducting films provided by the invention;
fig. 2 is a schematic cross-sectional structure diagram of a testing device and a testing method for a graphene heat-conducting film (the broken line is the graphene heat-conducting film);
fig. 3 is a schematic structural diagram of a rotation detection mechanism of a testing device and a testing method for graphene heat-conducting films (the dotted line is the graphene heat-conducting film);
fig. 4 is a schematic top view structure diagram of a testing device and a testing method for a graphene heat-conducting film according to the present invention (dotted lines are graphene heat-conducting films);
fig. 5 is a schematic diagram of the internal structure of a hood of the testing device and the testing method for graphene heat-conducting films provided by the invention;
fig. 6 is a schematic structural diagram of a propping mechanism of a testing device and a testing method for graphene heat conducting films;
fig. 7 is a schematic top view of a structure of an indication mechanism of a test device and a test method for a graphene heat-conducting film.
In the figure: 1 thermal insulation box, 2 heat conduction insulating winding sleeve, 3 rotation detection mechanism, 4 clamping mechanism, 401 electric push rod, 402 compacting plate, 403 fixed plate, 5 operation window, 6 temperature control mechanism, 601 hood, 602 ventilation hole, 603 electric heater, 604 refrigerator, 605 temperature controller, 7 ventilation mechanism, 701 air pump, 702 air pipe, 703 exhaust pipe, 704 first normally closed electromagnetic valve, 8 propping mechanism, 81 boss, 82 cylindrical cavity, 83 bar cavity, 84 propping piston, 85 slide bar, 86 movable block, 87 cone thorn, 88 spring, 89 communicating pipe, 810 second normally closed electromagnetic valve, 811 first normally open electromagnetic valve, 812 air outlet pipe, 813 second normally open solenoid valve, 9 indicating mechanism, 91 mounting panel, 92 lamp stand, 93 LED indicating lamp, 94 air cavity, 95 push piston, 96 recess, 97 first pressure switch, 98 flexible membrane, 99 hard preforming, 910 shunt tubes, 911 third normally closed solenoid valve, 912 exhaust hole, 10 sealed chamber door, 11 sealed window lid, 12 controller, 13 thermistor stick, 14 heat insulating strip, 15 electric strip, 16 electromagnetic switch, 17 drive assembly, 171 insulating rotating plate, 172 insulating movable plate, 173 self-locking motor, 174 screw locking assembly, 18 second pressure switch, 19 LED indicating lamp, 20 whistle, 21 round hole, 22 shutoff, 23 connecting rope.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-7, a testing device for a graphene heat conduction film comprises a heat insulation box 1, wherein a heat conduction insulating winding sleeve 2 is fixedly installed on the inner wall of the heat insulation box 1, a rotation detection mechanism 3 is installed inside the heat insulation box 1, the rotation detection mechanism 3 is used for detecting the heat conduction of the graphene heat conduction film, a clamping mechanism 4 is arranged on the upper side inside the heat insulation box 1, the clamping mechanism 4 is used for clamping the graphene heat conduction film, the clamping mechanism 4 comprises two electric push rods 401 fixedly inserted at the top of the heat insulation box 1, the two electric push rods 401 are electrically connected with a controller 12, pressing plates 402 are fixedly installed at the output ends of the two electric push rods 401, fixing plates 403 are arranged below the two pressing plates 402, the two fixing plates 403 are fixedly installed inside the heat insulation box 1, a travel switch (not shown in the drawing) is installed at the electric push rods 401, and the controller 12 is used for accurately controlling the travel of the electric push rods 401.
The side wall of the heat insulation box 1 is provided with an operation window 5 corresponding to the position of the clamping mechanism 4, the inner wall of the heat insulation box 1 is provided with a temperature control mechanism 6, the temperature control mechanism 6 is used for regulating and controlling the temperature inside the heat insulation box 1, the temperature control mechanism 6 comprises a hood 601 fixedly arranged inside the heat insulation box 1, the side wall of the hood 601 is provided with a plurality of ventilation holes 602, the inside of the hood 601 is fixedly provided with an electric heater 603 and a refrigerator 604, the hot end of the refrigerator 604 penetrates through the side walls of the hood 601 and the heat insulation box 1, the inner top of the heat insulation box 1 is fixedly provided with a temperature controller 605 electrically connected with the electric heater 603 and the refrigerator 604, the temperature controller 605 is electrically connected with a controller 12, an inductor of the temperature controller 605 can monitor the temperature inside the heat insulation box 1 in real time, and controls the refrigerator 604 to perform refrigeration work when the temperature is higher, and when the temperature is lower, the electric heater 603 is controlled to operate, the refrigerator 604 is formed by a plurality of semiconductor refrigeration pieces, after the refrigerator is electrified, the heat inside the hood 601 can be transferred to a mature refrigerating effect, and the refrigerating effect is achieved.
The lateral wall of the thermal insulation box 1 is provided with a ventilation mechanism 7 communicated with the temperature control mechanism 6, the ventilation mechanism 7 comprises an air pump 701 fixedly arranged on the outer lateral wall of the thermal insulation box 1, the output end of the air pump 701 is fixedly provided with an air pipe 702, the air pipe 702 is communicated with a hood 601, the top of the thermal insulation box 1 is fixedly inserted with an exhaust pipe 703, the interior of the exhaust pipe 703 is provided with a first normally closed electromagnetic valve 704, the first normally closed electromagnetic valve 704 is electrically connected with a controller 12, the first normally closed electromagnetic valve 704 is opened after being electrified, the air flow of unstable temperature inside the thermal insulation box 1 can be discharged, and the hood 601 and the heat conduction insulation winding sleeve 2 are provided with ventilation pipes communicated with each other for flowing air inside the heat conduction insulation winding sleeve 2, so that the temperature regulation and control are facilitated.
The side wall of the thermal insulation box 1 is provided with a jacking mechanism 8 communicated with the ventilation mechanism 7, the jacking mechanism 8 is used for carrying out puncture-resistant detection on the graphene heat-conducting film, the jacking mechanism 8 comprises a boss 81 fixedly inserted at the top of the thermal insulation box 1, a plurality of cylindrical cavities 82 and a strip-shaped cavity 83 are arranged in the boss 81, each cylindrical cavity 82 is communicated with the strip-shaped cavity 83, a jacking piston 84 is slidably arranged in each cylindrical cavity 82, the bottom of each jacking piston 84 is fixedly provided with a group of sliding rods 85, the rod walls of each sliding rod 85 are slidably connected with the cavity bottom of the cylindrical cavity 82, the rod walls of the same group of two sliding rods 85 are fixedly provided with movable blocks 86 together, the tops of the movable blocks 86 are fixedly inserted with conical spines 87, the spring 88 is installed jointly in each jacking piston 84 and the same side cylindrical cavity 82, the communicating pipe 89 is fixedly inserted into the strip-shaped cavity 83 and the pipe wall of the gas pipe 702 jointly, the second normally-closed electromagnetic valve 810 is installed in the communicating pipe 89, the first normally-open electromagnetic valve 811 is installed in the gas pipe 702, the gas outlet pipe 812 is fixedly inserted into the cavity wall of the strip-shaped cavity 83, the second normally-open electromagnetic valve 813 is installed in the gas outlet pipe 812, the second normally-closed electromagnetic valve 810, the first normally-open electromagnetic valve 811 and the second normally-open electromagnetic valve 813 are electrically connected with the controller 12, a certain jacking force is applied to the taper 87, whether the taper 87 can puncture the graphene heat-conducting film or not is observed, and whether the puncture resistance of the graphene heat-conducting film is qualified or not can be known.
The second pressure switch 18 is fixedly installed at the position, below the same-side jacking piston 84, of the inner part of each cylindrical cavity 82, the plurality of LED (light-emitting diode) indicator lamps 19 are fixedly installed on the outer side wall of the heat insulation box 1, each LED indicator lamp 19 is electrically connected with the corresponding second pressure switch 18, the whistle 20 is installed at the pipe end of the air outlet pipe 812, when the LED indicator lamp 19 is on, the anti-puncture performance of the graphene heat conducting film is poor, when the air flow passes through the whistle 20, the air flow can pass through a narrow channel, so that vortex and hydrodynamic effects can be generated, air molecules vibrate, sound is generated, and the personnel are prompted to puncture the test to finish.
The outer side wall of the thermal insulation box 1 is provided with an indicating mechanism 9 communicated with the ventilation mechanism 7, the indicating mechanism 9 is used for displaying the detection result of the rotation detection mechanism 3, the indicating mechanism 9 comprises a mounting plate 91 fixedly arranged on the outer side wall of the thermal insulation box 1, a lamp holder 92 is fixedly arranged on the side wall of the mounting plate 91, a plurality of LED indicating lamps 93 are arranged on the side wall of the lamp holder 92, an air cavity 94 is formed in the mounting plate 91, a push piston 95 is slidably arranged in the air cavity 94, a plurality of grooves 96 are formed in the cavity wall of the air cavity 94, a first pressure switch 97 electrically connected with the corresponding LED indicating lamps 93 is arranged in each groove 96, flexible films 98 are respectively packaged in the grooves of each groove 96, a hard pressing sheet 99 is fixedly arranged on the side wall of each flexible film 98, the air cavity 94 and the air delivery pipe 702 are fixedly connected with each other in an inserted mode, a shunt pipe 910 is arranged in the air cavity 910 in the air cavity, a third normally-closed electromagnetic valve 911 is arranged in the air cavity wall of the shunt pipe 910 in an inner mode, when the air cavity 94 is increased, the air cavity wall of the electromagnetic switch 16 is electrically connected with the third normally-closed electromagnetic valve through a controller 12, an air cavity 94 is provided with an air vent 912, and when the air pressure inside of the air cavity 94 increases, the hard pressing sheet 98 drives the hard pressing sheet 98 to drive the first pressure switch 97, and accordingly the first pressure switch 97 is closed.
The cavity wall of the air cavity 94 is provided with a round hole 21, a plug 22 is arranged in the round hole 21, a connecting rope 23 is arranged in the plug 22 and the extruding piston 95 together, the plug 22 is opened, the extruding piston 95 can be driven to move back and reset through the connecting rope 23, and the extruding piston 95 can be moved back after a single test is completed.
The box mouth of the thermal insulation box 1 is hinged with a sealing box door 10, the operation window 5 of the thermal insulation box 1 is hinged with a sealing window cover 11, the outer side wall of the thermal insulation box 1 is fixedly provided with a controller 12, the rotation detection mechanism 3 comprises a thermistor rod 13 arranged in the thermal insulation winding sleeve 2, the side wall of the thermistor rod 13 is contacted with the inner wall of the thermal insulation winding sleeve 2, the outer side of the thermal insulation winding sleeve 2 is provided with a thermal insulation strip 14, the side wall of the thermal insulation strip 14 is fixedly inserted with an electric heating strip 15, the inner wall of the thermal insulation box 1 is fixedly provided with an electromagnetic switch 16 electrically connected with the thermistor rod 13, the side wall of the thermal insulation box 1 is provided with a driving component 17, the driving component 17 is used for rotationally driving the thermal insulation strip 14 and the thermistor rod 13, the driving component 17 comprises an insulation rotating plate 171 and an insulation movable plate 172 which are arranged in the thermal insulation box 1, the insulating rotary plate 171 is arranged opposite to the insulating movable plate 172, the thermistor rod 13 is fixedly arranged on the side wall of the insulating rotary plate 171, the heat insulating strip 14 is fixedly arranged on the side wall of the insulating movable plate 172, the thermistor rod 13 is arranged opposite to the heat insulating strip 14, the side wall of the heat insulating box 1 is provided with a self-locking motor 173, the output end of the self-locking motor 173 is rotationally connected with the side wall of the heat insulating box 1, the insulating rotary plate 171 is fixedly arranged at the output end of the self-locking motor 173, the self-locking motor 173 is electrically connected with the controller 12, the insulating movable plate 172 and the insulating rotary plate 171 are jointly provided with a thread locking assembly 174, the self-locking motor 173 adopts a screw structure with a spiral line and is connected with an output shaft, when a driving force is applied to the screw rod, due to the inclined surface angle of the spiral line, an impedance torque is generated, the torque can prevent the output shaft from continuously rotating and lock the output shaft at the current position, the stability of the insulating rotary plate 171 during the test is ensured.
The principle of operation of the present invention will now be described as follows: opening the sealing box door 10, then tightly winding the graphene heat-conducting film sample on the heat-conducting insulating winding sleeve 2, placing one end of the graphene heat-conducting film sample on the two fixing plates 403, then pressing a clamping button on the controller 12, at the moment, driving the pressing plate 402 to move downwards by the two electric push rods 401, pressing and fixing the graphene heat-conducting film, screwing a bolt of the thread locking assembly 174, and enabling the side walls of the heat insulating strip 14 and the electric heating strip 15 to be in contact with the side walls of the graphene heat-conducting film;
pressing a temperature control button on the controller 12, at this time, the air pump 701, the first normally closed electromagnetic valve 704 in the exhaust pipe 703 and the temperature controller 605 are operated for 2 minutes at regular time, the temperature controller 605 controls the electric heater 603 and the refrigerator 604 to operate, the sensor of the temperature controller 605 can sense the indoor temperature and adjust the temperature in the heat insulation box 1 by controlling the electric heater 603 and the refrigerator 604 to operate, the air pump 701 is operated, hot air or cold air in the hood 601 can be blown into the heat insulation box 1, and air in the heat insulation box 1 is exhausted through the exhaust pipe 703, so that the temperature in the heat insulation box 1 can be stabilized at 25+/-1 ℃;
after the air pump 701 and the temperature controller 605 are in timing operation, the controller 12 controls the electric heating bar 15 to work for 5 seconds at timing and synchronously supplies power to the connection loop of the thermistor rod 13 and the electromagnetic switch 16 for 5 seconds at timing, the electric heating bar 15 works to generate heat, the heat can be transferred to the thermistor rod 13 through the graphene heat conducting film through the heat conducting insulation winding sleeve 2, if the heat conducting performance of the graphene heat conducting film is better in 5 seconds after the power is supplied to the connection loop of the thermistor rod 13 and the electromagnetic switch 16 at timing, the heat transferred to the thermistor rod 13 is more in 5 seconds, at the moment, the thermistor rod 13 can reduce the self resistance value due to the temperature rise, at the moment, the moving contact of the electromagnetic switch 16 can be magnetically closed, therefore, the controller 12 receives the electric signal of the electromagnetic switch 16 in 5 seconds, when the controller 12 controls the electric heating strip 15 to start working, the power supply to the air pump 701, the first normally-open electromagnetic valve 811 in the air pipe 702 and the third normally-closed electromagnetic valve 911 in the shunt pipe 910 is delayed for 10 seconds at fixed time, if the controller 12 receives the electric signal of the electromagnetic switch 16, the controller 12 cuts off the power supply loop to the air pump 701, the first normally-open electromagnetic valve 811 in the air pipe 702 and the third normally-closed electromagnetic valve 911 in the shunt pipe 910, if the graphene heat conducting film has poor heat conducting performance, the heat transferred to the thermistor rod 13 is less in 5 seconds, at this time, the moving contact of the electromagnetic switch 16 is not magnetically closed because the resistance value of the thermistor rod 13 is higher, and therefore the controller 12 cannot receive the electric signal of the electromagnetic switch 16, and after the delayed 6 seconds, the controller 12 starts the air pump 701, the first normally-open electromagnetic valve 811 in the air pipe 702 and the third normally-closed electromagnetic valve 911 in the shunt pipe 910 work for 10 seconds at regular time, at this moment, the air conveyed by the air pump 701 enters the air cavity 94 through the air pipe 702 and the shunt pipe 910, so that the extruding piston 95 can be pushed to move, and the extruding piston 95 can pass through one groove 96, at this moment, under the action of air pressure, the air can extrude the flexible film 98 and drive the hard pressing sheet 99 to touch the first pressure switch 97, at this moment, the corresponding LED indicator lamp 93 can be lightened, and the thermal conductivity test of one position of the graphene thermal conductive film is completed;
after the thermal conductivity of one position of the graphene thermal conductive film is tested, the controller 12 controls the air pump 701, the first normally closed electromagnetic valve 704 in the exhaust pipe 703 and the temperature controller 605 to work for 2 minutes at regular time again, so that the temperature of the thermal insulation box 1 is stabilized at 25+/-1 ℃ again, meanwhile, the controller 12 controls the self-locking motor 173 to work for 5 seconds at regular time, at the moment, the self-locking motor 173 drives the insulating rotating plate 171 to drive the insulating movable plate 172 to rotate for a certain angle, so that the thermistor rod 13 and the thermal insulation strip 14 can be driven to rotate and transfer to the next position of the graphene thermal conductive film, then, the controller 12 controls the electric heating strip 15, the thermistor rod 13 and the electromagnetic switch 16 to repeat the thermal conductivity test of the graphene thermal conductive film until all the thermal conductive films are tested, and then, a person observes whether all the LED indicator lamps 93 are on or not, if the LED indicator lamps 93 are on, the thermal conductive performance of the graphene thermal conductive film is better, and if the LED indicator lamps 93 are on, the quantity of the thermal conductive test points is more, the thermal conductive performance of the graphene thermal conductive film is poor;
after the thermal conductivity test of the graphene thermal conductive film is completed, the sealing window cover 11 is opened, and the puncture button on the controller 12 is pressed, at this time, the controller 12 controls the air pump 701, the first normally-open electromagnetic valve 811 in the air pipe 702, the second normally-closed electromagnetic valve 810 in the communicating pipe 89 and the second normally-open electromagnetic valve 813 in the air outlet pipe 812 to work for 30 seconds at regular time, at this time, air conveyed by the air pump 701 enters the strip-shaped cavity 83 through the air pipe 702 and the communicating pipe 89, under the action of air pressure, each top pressure piston 84 can be pushed to move downwards, so that the cone puncture 87 can be driven to move downwards through the sliding rod 85 and the movable block 86, and further, puncture test can be performed on the graphene thermal conductive film, and as the air pressure increases, the puncture force of the cone puncture 87 on the graphene thermal conductive film is larger, under the action of air pressure if the puncture resistance of the graphene thermal conductive film is poor, the taper 87 pierces the graphene heat conduction film, at this time, the pushing piston 84 moves downwards to press the second pressure switch 18, at this time, the corresponding LED indicator lamp 19 is on, if the puncture resistance of the graphene heat conduction film is good, the taper 87 cannot pierce the graphene heat conduction film, at this time, since the moving contact of the second pressure switch 18 cannot be pressed, the LED indicator lamp 19 cannot be on, and after the air pump 701, the first normally open electromagnetic valve 811 in the air pipe 702, the second normally closed electromagnetic valve 810 in the communicating pipe 89, and the second normally open electromagnetic valve 813 in the air pipe 812 are finished at regular time for 30 seconds, under the action of the spring 88, the redundant air in the cylindrical cavity 82 and the strip cavity 83 is discharged through the air pipe 812, the discharged air flow enters the whistle 20, and the whistle 20 can make a sound, therefore, when the person makes a sound at the whistle 20, the end of the puncture resistance test of a single position of the graphene heat-conducting film is described;
after hearing the sound of whistle 20, push the grip button on controller 12, at this moment, electric putter 401 drives pressure strip 402 and shifts up and break away from the graphite alkene heat conduction film, and then, the staff outwards pulls graphite alkene heat conduction film through operating window 5, if the staff wants the anti puncture performance of multiple spot detection graphite alkene heat conduction film, then stop pulling graphite alkene heat conduction film to push down the grip button on controller 12 again, wait that pressure strip 402 compresses tightly the fixed back to graphite alkene heat conduction film, push the puncture button on controller 12 again can.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The utility model provides a testing arrangement of graphite alkene heat conduction film, includes insulation box (1), its characterized in that, the inner wall fixed mounting of insulation box (1) has heat conduction insulating winding cover (2), and the internally mounted of insulation box (1) has rotation detection mechanism (3), rotation detection mechanism (3) are used for detecting the heat conduction of graphite alkene heat conduction film, the inside upside of insulation box (1) is provided with fixture (4), and fixture (4) are used for compressing tightly the centre gripping to graphite alkene heat conduction film, operation window (5) corresponding with fixture (4) position are seted up to the lateral wall of insulation box (1), temperature control mechanism (6) are installed to the inner wall of insulation box (1), and temperature control mechanism (6) are used for regulating and controlling the inside temperature of insulation box (1), ventilation mechanism (7) that are linked together with temperature control mechanism (6) are installed to the lateral wall of insulation box (1), and the tip thorn mechanism (8) that are linked together with mechanism (7) are installed to the lateral wall of insulation box (1), tip thorn mechanism (8) are used for compressing tightly centre gripping to graphite alkene heat conduction film, the indicator is used for showing that the detection mechanism (9) are carried out to the outside of insulation box (1) and are connected with ventilation mechanism (9), a sealing box door (10) is hinged at a box opening of the heat insulation box (1), a sealing window cover (11) is hinged at an operation window (5) of the heat insulation box (1), and a controller (12) is fixedly arranged on the outer side wall of the heat insulation box (1);
the rotation detection mechanism (3) comprises a thermistor rod (13) arranged in the heat conduction insulation winding sleeve (2), the side wall of the thermistor rod (13) is in contact with the inner wall of the heat conduction insulation winding sleeve (2), a heat insulation strip (14) is arranged on the outer side of the heat conduction insulation winding sleeve (2), an electric heating strip (15) is fixedly inserted into the side wall of the heat insulation strip (14), an electromagnetic switch (16) electrically connected with the thermistor rod (13) is fixedly arranged on the inner wall of the heat insulation box (1), a driving assembly (17) is arranged on the side wall of the heat insulation box (1), and the driving assembly (17) is used for rotationally driving the heat insulation strip (14) and the thermistor rod (13);
the indicating mechanism (9) comprises a mounting plate (91) fixedly arranged on the outer side wall of the heat insulation box (1), a lamp holder (92) is fixedly arranged on the side wall of the mounting plate (91), a plurality of LED indicating lamps (93) are arranged on the side wall of the lamp holder (92), an air cavity (94) is formed in the mounting plate (91), a pushing piston (95) is slidably arranged in the air cavity (94), a plurality of grooves (96) are formed in the cavity wall of the air cavity (94), first pressure switches (97) electrically connected with the corresponding LED indicating lamps (93) are respectively arranged in the grooves (96), flexible films (98) are respectively packaged in the notch of each groove (96), a hard pressing sheet (99) is respectively and fixedly arranged on the side wall of each flexible film (98), a shunt pipe (910) is fixedly inserted into the air cavity (94) and the air conveying pipe (702), a third normally-closed electromagnetic valve (912) is arranged in the air cavity wall of the shunt pipe (910), and the electromagnetic switch (16) is electrically connected with the third normally-closed electromagnetic valve (911) through a controller (12), and the air cavity wall (911) is formed in the air cavity wall of the air cavity wall (911);
the driving assembly (17) comprises an insulating rotating plate (171) and an insulating movable plate (172) which are arranged inside the heat insulation box (1), the positions of the insulating rotating plate (171) and the insulating movable plate (172) are opposite, the thermistor rod (13) is fixedly arranged on the side wall of the insulating rotating plate (171), the heat insulation strip (14) is fixedly arranged on the side wall of the insulating movable plate (172), the thermistor rod (13) and the heat insulation strip (14) are opposite, the side wall of the heat insulation box (1) is provided with a self-locking motor (173), the output end of the self-locking motor (173) is rotationally connected with the side wall of the heat insulation box (1), the insulating rotating plate (171) is fixedly arranged at the output end of the self-locking motor (173), the self-locking motor (173) is electrically connected with the controller (12), and the insulating movable plate (172) and the insulating rotating plate (171) are jointly provided with a thread locking assembly (174).
2. The testing device of the graphene heat conducting film according to claim 1, wherein the clamping mechanism (4) comprises two electric push rods (401) fixedly inserted into the top of the heat insulation box (1), the two electric push rods (401) are electrically connected with the controller (12), the output ends of the two electric push rods (401) are fixedly provided with pressing plates (402), the lower parts of the two pressing plates (402) are provided with fixing plates (403), and the two fixing plates (403) are fixedly installed inside the heat insulation box (1).
3. The testing device of the graphene heat-conducting film according to claim 2, wherein the temperature control mechanism (6) comprises a hood (601) fixedly arranged inside the heat insulation box (1), a plurality of ventilation holes (602) are formed in the side wall of the hood (601), an electric heater (603) and a refrigerator (604) are fixedly arranged inside the hood (601), the hot end of the refrigerator (604) penetrates through the side wall of the hood (601) and the heat insulation box (1), a temperature controller (605) electrically connected with the electric heater (603) and the refrigerator (604) is fixedly arranged on the inner top of the heat insulation box (1), and the temperature controller (605) is electrically connected with the controller (12).
4. The testing device of the graphene heat conduction film according to claim 3, wherein the ventilation mechanism (7) comprises an air pump (701) fixedly installed on the outer side wall of the heat insulation box (1), an air pipe (702) is fixedly installed at the output end of the air pump (701), the air pipe (702) is communicated with the hood (601), an exhaust pipe (703) is fixedly inserted into the top of the heat insulation box (1), a first normally closed electromagnetic valve (704) is installed in the exhaust pipe (703), and the first normally closed electromagnetic valve (704) is electrically connected with the controller (12).
5. The device for testing the graphene heat-conducting film according to claim 4, wherein the jacking mechanism (8) comprises a boss (81) fixedly inserted into the top of the heat insulation box (1), a plurality of cylindrical cavities (82) and a strip-shaped cavity (83) are formed in the boss (81), the cylindrical cavities (82) are communicated with the strip-shaped cavity (83), jacking pistons (84) are slidably arranged in the cylindrical cavities (82), a group of sliding rods (85) are fixedly arranged at the bottoms of the jacking pistons (84), rod walls of the sliding rods (85) are fixedly connected with the bottoms of the cylindrical cavities (82), movable blocks (86) are fixedly arranged on the rod walls of the same group of two sliding rods (85), conical spines (87) are fixedly inserted into the tops of the movable blocks (86), springs (88) are commonly arranged on the jacking pistons (84) and the same side cylindrical cavities (82), a plurality of normally-closed electromagnetic valves (83) are fixedly arranged in the strip-shaped cavity (89), a normally-open communication pipe (812) is fixedly arranged in the second electromagnetic valve (702), a normally-open communication pipe (811) is fixedly arranged in the second electromagnetic valve (702), and a second normally-open electromagnetic valve (813) is arranged in the air outlet pipe (812), and the second normally-closed electromagnetic valve (810), the first normally-open electromagnetic valve (811) and the second normally-open electromagnetic valve (813) are electrically connected with the controller (12).
6. The device for testing the graphene heat-conducting film according to claim 5, wherein the second pressure switches (18) are fixedly installed at positions, located below the same-side jacking pistons (84), of the inner portions of the cylindrical cavities (82), a plurality of LED indicator lamps (19) are fixedly installed on the outer side wall of the heat insulation box (1), the LED indicator lamps (19) are electrically connected with the corresponding second pressure switches (18), and whistle (20) are installed at the pipe ends of the air outlet pipes (812).
7. The device for testing the graphene heat-conducting film according to claim 6, wherein a round hole (21) is formed in the cavity wall of the air cavity (94), a plug (22) is mounted in the round hole (21), and a connecting rope (23) is mounted in the plug (22) and the pushing piston (95) together.
8. The method for testing the testing device of the graphene heat-conducting film according to claim 7, wherein the testing method comprises the following steps:
s1, opening a sealing box door (10), then tightly winding a graphene heat-conducting film sample on a heat-conducting insulating winding sleeve (2), placing one end of the graphene heat-conducting film sample on two fixing plates (403), and then pressing a clamping button on a controller (12), wherein at the moment, two electric push rods (401) drive a pressing plate (402) to move downwards and press and fix the graphene heat-conducting film;
s2, screwing bolts of the movable thread locking assembly (174) to enable the side walls of the heat insulation strips (14) and the electric heating strips (15) to be in contact with the side walls of the graphene heat conducting films;
s3, pressing a temperature control button on the controller (12), wherein the air pump (701), the first normally-closed electromagnetic valve (704) and the temperature controller (605) work for 2 minutes at regular time, and the temperature controller (605) controls the electric heater (603) and the refrigerator (604) to work, so that the temperature in the heat insulation box (1) can be stabilized at 25+/-1 ℃;
s4, after the timing work of the air pump (701) and the temperature controller (605) is finished, the controller (12) controls the electric heating strip (15) to work for 5 seconds at fixed time, and synchronously supplies power to a connecting loop of the thermistor rod (13) and the electromagnetic switch (16) for 5 seconds at fixed time;
s5, after 5 seconds after the step S4 is finished, the controller (12) controls the air pump (701) and the temperature controller (605) to repeat the step S3, so that the temperature of the heat insulation box (1) is stabilized at 25+/-1 ℃, meanwhile, the controller (12) controls the self-locking motor (173) to work for 5 seconds at regular time, and then, the controller (12) controls the electric heating strip (15), the thermistor rod (13) and the electromagnetic switch (16) to repeat the step S4 until the heat conduction performance test of the graphene heat conduction film is finished;
s6, a person observes whether all the LED indicator lamps (93) are lighted, if no LED indicator lamp (93) is lighted, the graphene heat conduction film has good heat conduction performance, and if the LED indicator lamps (93) are lighted, the more the LED indicator lamps (93) are lighted, the worse the heat conduction performance of the graphene heat conduction film is indicated;
s7, after the step S6 is finished, opening the sealing window cover (11) and pressing a puncture button on the controller (12), wherein the controller (12) can control the air pump (701), the first normally-open electromagnetic valve (811), the second normally-closed electromagnetic valve (810) and the second normally-open electromagnetic valve (813) to work for 30 seconds at regular time;
s8, observing whether the LED indicator lamp (19) is lightened, if so, indicating that the graphene heat conduction film is pierced, and if the LED indicator lamp (19) is not lightened, indicating that the graphene heat conduction film has good piercing resistance;
s9, after hearing the sound of whistle (20), pressing the clamping button on controller (12), at this moment, electric putter (401) drive pinch plate (402) move upwards and break away from the graphite alkene heat conduction film, then, personnel outwards stimulate graphite alkene heat conduction film through operating window (5), if personnel want the puncture resistance of multiple spot detection graphite alkene heat conduction film, then stop pulling graphite alkene heat conduction film, and press the clamping button on controller (12) again, wait to pinch plate (402) compress tightly fixed back to graphite alkene heat conduction film, again press the puncture button on controller (12).
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