A testing device based on the electrical conductivity of composite materials

Abstract

The present invention provides a test device for the electrical conductivity of composite materials, comprising: a test box; a partition, the top and bottom of the partition are respectively fixed to the top and bottom of the inner wall of the test box, and a circular hole is opened on the partition, and a cover plate for sealing the circular hole is hinged on one side of the partition and located on the side of the circular hole through a hinge; a motor, the motor is arranged on one side of the test box. The test device for the electrical conductivity of composite materials provided by the present invention can adjust the positions of the first jet nozzle and the second jet nozzle through the arranged motor, so that the gas released by the heater and the refrigerator can evenly cover the surface of the composite material, avoiding the phenomenon of gas accumulation, resulting in the local temperature of the composite material surface being too high or too low, and then causing a certain error in the electrical conductivity data, thereby improving the accuracy of the test data of the device.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, and in particular to a testing device based on the electrical conductivity of composite materials. Background Art

[0002] Composite materials are new materials made by optimizing the combination of material components with different properties using advanced material preparation technology. The matrix materials of composite materials are divided into two categories: metal and non-metal. Commonly used metal matrices are aluminum, magnesium, copper, titanium and their alloys. Non-metal matrices mainly include synthetic resins, rubber, ceramics, graphite, carbon, etc. Reinforcement materials mainly include glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber, whiskers, and metal.

[0003] When testing the electrical conductivity of some metal composite materials, in order to collect more comprehensive data on the electrical conductivity of the metal composite materials, temperature simulation is generally used to place them in different temperature environments for electrical conductivity testing.

[0004] In the related art, when performing temperature simulation, the gas of different temperatures is sprayed into the test box through the set jet nozzle, and the contact reaction of the composite material is then tested for the guiding performance, and the test results are recorded. However, since the position of the jet nozzle is generally fixed, accumulation is likely to occur when spraying gases of different temperatures, causing the local temperature of the composite material to be too high or too low, resulting in certain errors in the conductive test data, resulting in a decrease in the accuracy of the data.

[0005] Therefore, it is necessary to provide a testing device based on the electrical conductivity of composite materials to solve the above technical problems. Summary of the invention

[0006] The invention provides a test device for the electrical conductivity of composite materials, which solves the problem that the accumulation phenomenon is easy to occur when the gases of different temperatures are sprayed because the position of the air jet nozzle is generally fixed.

[0007] In order to solve the above technical problems, the present invention provides a test device for the electrical conductivity of composite materials, comprising:

[0008] Test box;

[0009] A partition, the top and bottom of which are respectively fixed to the top and bottom of the inner wall of the test box, and a circular hole is opened on the partition, and a cover plate for sealing the circular hole is hingedly connected to one side of the partition and located on one side of the circular hole through a hinge;

[0010] A motor, the motor is arranged at one side of the test box, and a lead screw is fixedly connected to the motor output shaft, one end of the lead screw sequentially passes through the test box and the partition and extends to one side of the partition, and one end of the lead screw extending to the partition is rotatably connected to one side of the inner wall of the test box;

[0011] a first jet nozzle and a second jet nozzle, wherein the first jet nozzle and the second jet nozzle are both threadedly connected to the outer surface of the screw rod;

[0012] A heater and a refrigerator, the heater and the refrigerator are respectively arranged on both sides of the top of the test box, and one side of the heater is connected to a first hose, the bottom end of the first hose passes through the test box and extends to the interior of the test box, and one end of the first hose extending to the interior of the test box is connected to the interior of the first jet nozzle, and one side of the refrigerator is connected to a second hose, the bottom end of the second hose passes through the test box and extends to the interior of the test box, and one end of the second hose extending to the interior of the test box is connected to the interior of the second jet nozzle.

[0013] Preferably, a tester is arranged on the top of the test box, both sides of the tester are connected with connecting wires, one end of the connecting wire is electrically connected to a circuit board, and a signal bulb is arranged on the circuit board.

[0014] Preferably, a wire receiving box is fixedly connected to both sides of the top of the inner wall of the test box, a rotating shaft is rotatably connected to the back side of the inner wall of the wire receiving box, a front end of the rotating shaft passes through the wire receiving box and extends to the outside of the wire receiving box, and one end of the rotating shaft extending to the outside of the wire receiving box is fixedly connected to a rotating disk.

[0015] Preferably, a winding disk is fixedly connected to the interior of the wire receiving box and the outer surface of the rotating shaft, and the bottom end of the connecting wire passes through the test box and the wire receiving box in sequence and extends to the interior of the wire receiving box, and one end of the connecting wire extending to the interior of the wire receiving box is wound around the outer surface of the winding disk.

[0016] Preferably, an opening for the guide to pass through is formed at the bottom of the wire receiving box, and the free end of the connecting wire passes through the opening and extends to the bottom of the opening.

[0017] Preferably, the bottom of the inner wall of the test box is fixedly connected to an operating table, and transparent covers for observation are provided on both sides of the front of the test box.

[0018] Preferably, a sliding groove is provided on the front side of the operating table, a sliding plate is slidably connected between the two sides of the sliding groove, an auxiliary table is fixedly connected to one side of the sliding plate, a groove is provided on the auxiliary table, a displacement block is slidably connected between the two sides of the groove, and a clamping plate for fixing the composite material is fixedly connected to one side of the displacement block.

[0019] Preferably, a limit spring is arranged on the other side of the displacement block, and one end of the limit spring is arranged on one side inside the groove.

[0020] Preferably, a locking groove is provided at the bottom of the sliding groove, a protrusion block is slidably connected between the two sides inside the locking groove, a compression spring is provided on one side of the protrusion, and the bottom end of the compression spring is provided at the bottom of the inner wall of the locking groove.

[0021] Preferably, a clamping groove is provided at the bottom of the auxiliary platform, and the top end of the protruding member passes through the clamping groove and extends to the inside of the clamping groove.

[0022] Compared with the related art, the test device for the electrical conductivity of composite materials provided by the present invention has the following beneficial effects:

[0023] The present invention provides a testing device for the electrical conductivity of a composite material. The position of a first jet nozzle and a second jet nozzle can be adjusted by a set motor, so that the gas released by a heater and a refrigerator can evenly cover the surface of the composite material, avoiding the phenomenon of gas accumulation, resulting in the local temperature of the composite material surface being too high or too low, and thus causing a certain error in the electrical conductivity data, thereby improving the accuracy of the test data of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a first embodiment of a test device for electrical conductivity of a composite material provided by the present invention;

[0025] Figure 2 A cross-sectional schematic diagram of a test device for electrical conductivity of a composite material provided by the present invention;

[0026] Figure 3 for Figure 1 A schematic diagram of the structure of the test box from top view shown;

[0027] Figure 4 for Figure 2 A schematic cross-sectional view of the wire take-up box shown;

[0028] Figure 5 for Figure 2 The structural schematic diagram of the first jet nozzle is shown;

[0029] Figure 6 for Figure 2 A schematic diagram of the side structure of the partition shown;

[0030] Figure 7 A schematic structural diagram of a second embodiment of a test device for electrical conductivity of a composite material provided by the present invention;

[0031] Figure 8 for Figure 7 A schematic diagram of the structure of the auxiliary platform from a top view;

[0032] Fig. 9 for Figure 7 Schematic cross-sectional view of the operating station shown.

[0033] Numbers in the figure: 1, test box, 2, partition, 3, round hole, 4, cover plate, 5, motor, 6, screw, 7, first jet nozzle, 8, second jet nozzle, 9, heater, 10, refrigerator, 11, first hose, 12, second hose, 13, tester, 14, connecting wire, 15, circuit board, 16, signal bulb, 17, wire box, 18, rotating shaft, 19, rotating disk, 20, winding disk, 21, opening, 22, operating table, 23, transparent cover plate, 24, sliding groove, 25, sliding plate, 26, auxiliary table, 27, groove, 28, displacement block, 29, clamping plate, 30, limit spring, 31, locking groove, 32, protrusion, 33, extrusion spring, 34, clamping groove. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0035] First embodiment

[0036] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ,in, Figure 1 A schematic structural diagram of a first embodiment of a test device for electrical conductivity of a composite material provided by the present invention; Figure 2 A cross-sectional schematic diagram of a test device for electrical conductivity of a composite material provided by the present invention; Figure 3 for Figure 1 A schematic diagram of the structure of the test box from top view shown; Figure 4 for Figure 2 A schematic cross-sectional view of the wire take-up box shown; Figure 5 for Figure 2 The structural schematic diagram of the first jet nozzle is shown; Figure 6 for Figure 2 The side view structure diagram of the separator is shown. The test device based on the electrical conductivity of the composite material includes:

[0037] Test box 1;

[0038] A partition 2, the top and bottom of the partition 2 are respectively fixed to the top and bottom of the inner wall of the test box 1, and a circular hole 3 is opened on the partition 2, and a cover plate 4 for sealing the circular hole 3 is hinged on one side of the partition 2 and located on one side of the circular hole 3 through a hinge;

[0039] A motor 5, wherein the motor 5 is disposed at one side of the test box 1, and a screw rod 6 is fixedly connected to the output shaft of the motor 5, one end of the screw rod 6 sequentially passes through the test box 1 and the partition 2 and extends to one side of the partition 2, and one end of the screw rod 6 extending to the partition 2 is rotatably connected to one side of the inner wall of the test box 1;

[0040] A first air jet nozzle 7 and a second air jet nozzle 8, wherein the first air jet nozzle 7 and the second air jet nozzle 8 are both threadedly connected to the outer surface of the screw rod 6;

[0041] A heater 9 and a refrigerator 10, the heater 9 and the refrigerator 10 are respectively arranged on both sides of the top of the test box 1, and one side of the heater 9 is connected with a first hose 11, the bottom end of the first hose 11 passes through the test box 1 and extends to the inside of the test box 1, and one end of the first hose 11 extending to the inside of the test box 1 is connected to the inside of the first jet nozzle 7, and one side of the refrigerator 10 is connected with a second hose 12, the bottom end of the second hose 12 passes through the test box 1 and extends to the inside of the test box 1, and one end of the second hose 12 extending to the inside of the test box 1 is connected to the inside of the second jet nozzle 8;

[0042] The motor 5, the heater 9 and the refrigerator 10 are all connected to an external power source and a control switch;

[0043] The motor 5 is a forward and reverse motor, driving the first jet nozzle 7 and the second jet nozzle 8 to reciprocate, so that the ejected hot air and cold air can evenly cover the air inside the test box 1, so that the guiding performance of two identical composite materials under different temperature environments can be compared;

[0044] The first hose 11 and the second hose 12 can be folded and stretched to meet the movement of the first jet nozzle 7 and the second jet nozzle 8;

[0045] The heater 9 is set to cool the outside air, so that it is sprayed into the composite material to record the data of its conductive properties;

[0046] The setting of the refrigerator 10 can heat the outside air, so as to spray it into the composite material and record the data of its conductive properties;

[0047] The circular hole 3 is opened to allow air to flow on both sides, and finally the temperature is the same. Then the conductivity of the two composite materials is tested to see if they are the same, and the conductivity data is recorded.

[0048] A tester 13 is disposed on the top of the test box 1. Both sides of the tester 13 are connected with connecting wires 14. One end of the connecting wire 14 is electrically connected to a circuit board 15. A signal bulb 16 is disposed on the circuit board 15.

[0049] The signal bulb 16 is set up, and by observing its brightness, the conductive properties of the two groups of composite materials under different environments can be intuitively felt;

[0050] The tester 13 adopts the existing technology and only needs to measure the data of the conductive properties of the composite material;

[0051] And the tester 13 is connected to an external power source and a control switch;

[0052] When testing the composite material, connect the connecting wire 14 to the composite material, set the EST103 electrometer range to 20V, turn "ZERO" to the left, start the test, and after the test, turn the switch to the "10M" position so that it is in a low internal resistance state to play a protective role. Then adjust the voltage source from small to high. When increasing the voltage, observe the readings of the EST122 picoammeter and the EST103 electrometer at the same time. When the voltage is adjusted to about 10V, adjust the range so that the electrometer and the picoammeter can read at the same time. Finally, record the readings of the EST103 electrometer and the EST122 picoammeter. Record the reading of the EST103 electrometer as the voltage V and the reading of the EST122 picoammeter as the current I, and obtain the resistance R, so as to analyze the conductive properties of each composite material.

[0053] A wire receiving box 17 is fixedly connected to both sides of the top of the inner wall of the test box 1, and a rotating shaft 18 is rotatably connected to the back of the inner wall of the wire receiving box 17. The front end of the rotating shaft 18 passes through the wire receiving box 17 and extends to the outside of the wire receiving box 17. One end of the rotating shaft 18 extending to the outside of the wire receiving box 17 is fixedly connected to a rotating disk 19;

[0054] The setting of the take-up box 17 will not affect the opening of the cover plate 4, because the distance between the two is sufficient for the cover plate 4 to open and rotate;

[0055] And it will not affect the movement of the first air jet nozzle 7 and the second air jet nozzle 8 because they are not in the same straight line.

[0056] A winding disk 20 is fixedly connected inside the wire receiving box 17 and on the outer surface of the rotating shaft 18. The bottom end of the connecting wire 14 passes through the test box 1 and the wire receiving box 17 in sequence and extends to the inside of the wire receiving box 17. One end of the connecting wire 14 extending to the inside of the wire receiving box 17 is wound around the outer surface of the winding disk 20.

[0057] When the connecting wire 14 is wound in the winding disk 20, there are two guides inside, which are convenient for connecting to both sides of the composite material to test the guiding performance;

[0058] The wire collection box 17 can be used to store relatively long connecting wires 14 , thereby improving the neatness and safety of the test operation table 22 and preventing the connecting wires 14 from being scattered on the operation table 22 , thereby ensuring a certain degree of electrical safety.

[0059] The bottom of the wire receiving box 17 is provided with an opening 21 for the guide to pass through, and the free end of the connecting wire 14 passes through the opening 21 and extends to the bottom of the opening 21 .

[0060] The bottom of the inner wall of the test box 1 is fixedly connected with an operating table 22, and both sides of the front of the test box 1 are provided with transparent cover plates 23 for observation;

[0061] The transparent cover plate 23 is provided to facilitate observation of the situation in the test box 1;

[0062] Two operating tables 22 are provided to facilitate comparative experiments on the same composite material, thereby reflecting the conductive properties of the two under different environments.

[0063] The working principle of the test device for the electrical conductivity of composite materials provided by the present invention is as follows:

[0064] When testing the composite material, first, two identical composite materials are placed on the operating table 22, and then the rotating disk 19 is rotated to drive the connecting wire 14 wound on the winding disk 20 to spread out and come out from the opening 21, and its ends are connected to the two sides of the composite material. Through the connection between the connecting wire 14 and the tester 13, the data of the conductive performance of the composite material is displayed on the tester 13 for easy recording;

[0065] In order to make the data of the conductive performance more comprehensive, at this time, the refrigerator 10 and the heater 9 are started respectively, so that the generated cold air and hot air are transported by the second hose 12 and the first hose 11, and finally sprayed and released on the second jet nozzle 8 and the first jet nozzle 7, so as to cover the surface of the composite material. In order to avoid the accumulation of hot air or cold air, the motor 5 is started to rotate the screw 6 on the output shaft of the motor 5, thereby driving the first jet nozzle 7 and the second jet nozzle 8 to slide on the surface of the screw 6, so that the hot air and cold air can be moved and sprayed, avoiding accumulation, and can evenly cover the surface of the composite material. At this time, at different temperatures, the data displayed on the tester 13 are recorded;

[0066] Afterwards, the cover plate 4 is opened to mix the gases on both sides of the test box 1 so that the temperatures in different areas are the same. At this time, the data displayed by the tester 13 is observed to record the conductivity data of the composite materials placed on both sides.

[0067] Compared with the related art, the test device for the electrical conductivity of composite materials provided by the present invention has the following beneficial effects:

[0068] By setting the motor 5, the positions of the first jet nozzle 7 and the second jet nozzle 8 can be adjusted, so that the gas released by the heater 9 and the refrigerator 10 can evenly cover the surface of the composite material, avoiding the phenomenon of gas accumulation, which causes the local temperature of the composite material surface to be too high or too low, and thus causes a certain error in the conductive performance data, thereby improving the accuracy of the test data of the device.

[0069] Second embodiment

[0070] Please refer to Figure 7-9 Based on the test device for the electrical conductivity of composite materials provided in the first embodiment of the present application, the second embodiment of the present application proposes another test device for the electrical conductivity of composite materials. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0071] Specifically, the difference of the test device for composite material conductivity provided by the second embodiment of the present application is that: a sliding groove 24 is provided on the front of the operating table 22, a sliding plate 25 is slidably connected between the two sides of the inside of the sliding groove 24, an auxiliary table 26 is fixedly connected to one side of the sliding plate 25, a groove 27 is provided on each of the auxiliary tables 26, a displacement block 28 is slidably connected between the two sides of the inside of the groove 27, and a clamping plate 29 for fixing the composite material is fixedly connected to one side of the displacement block 28;

[0072] The provision of the auxiliary table 26 can increase the usable area of ​​the operating table 22, making it easier to place the composite material to be tested.

[0073] A limit spring 30 is disposed on the other side of the displacement block 28, and one end of the limit spring 30 is disposed on one side inside the groove 27;

[0074] The limit spring 30 is provided to push the clamping plate 29 on the displacement block to clamp and fix the composite material under rebound, thereby improving the stability of the test;

[0075] Furthermore, by compressing the limit spring 30 , composite materials of different lengths can be clamped, thereby increasing the scope of use.

[0076] A locking groove 31 is provided at the bottom of the sliding groove 24, and a protrusion 32 is slidably connected between the two sides of the locking groove 31. A compression spring 33 is provided on one side of the protrusion 32, and the bottom end of the compression spring 33 is provided at the bottom of the inner wall of the locking groove 31.

[0077] The extrusion spring 33 is provided to push the protrusion 32 into the clamping groove during the rebound process, thereby fixing the position of the auxiliary platform 26 and improving the stability of use.

[0078] A clamping groove 34 is formed at the bottom of the auxiliary platform 26, and the top end of the protrusion 32 passes through the clamping groove 34 and extends to the inside of the clamping groove 34;

[0079] The bottom of the clamping groove 34 is provided with an annular arc surface to facilitate the protrusion 32 to slide out and slide in;

[0080] The engaging groove 34 is matched with the protruding member 32 .

[0081] In order to be able to test composite materials of different sizes, since the area of ​​the operating table 22 is limited and the number of composite materials placed is limited, the auxiliary table 26 is provided to increase the use area of ​​the operating table 22. When multiple composite materials are tested, the auxiliary table 26 is pulled out from the operating table 22 so that the protrusion 32 slides at the bottom of the auxiliary table 26 until it enters the snap-in groove 34. Under the rebound of the extrusion spring 33, the snap-in fixation between the protrusion 32 and the snap-in groove 34 is pushed, thereby completing the locking and fixing of the position of the pulled-out auxiliary table 26, preventing the position of the auxiliary table 26 from moving during use, thereby affecting the connection of the connecting line 14, which is prone to disconnection and further affecting the test.

[0082] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A test device for the electrical conductivity of composite materials, characterized in that: include: Test box; A partition, the top and bottom of which are respectively fixed to the top and bottom of the inner wall of the test box, and a circular hole is opened on the partition, and a cover plate for sealing the circular hole is hingedly connected to one side of the partition and located on one side of the circular hole through a hinge; A motor, the motor is arranged at one side of the test box, and a lead screw is fixedly connected to the motor output shaft, one end of the lead screw sequentially passes through the test box and the partition and extends to one side of the partition, and one end of the lead screw extending to the partition is rotatably connected to one side of the inner wall of the test box; a first jet nozzle and a second jet nozzle, wherein the first jet nozzle and the second jet nozzle are both threadedly connected to the outer surface of the screw rod; A heater and a refrigerator, the heater and the refrigerator are respectively arranged on both sides of the top of the test box, and one side of the heater is connected to a first hose, the bottom end of the first hose passes through the test box and extends to the inside of the test box, and one end of the first hose extending to the inside of the test box is connected to the inside of the first jet nozzle, and one side of the refrigerator is connected to a second hose, the bottom end of the second hose passes through the test box and extends to the inside of the test box, and one end of the second hose extending to the inside of the test box is connected to the inside of the second jet nozzle; The motor is a forward and reverse motor, which drives the first jet nozzle and the second jet nozzle to perform reciprocating motion, so that the ejected hot air and cold air can evenly cover the air inside the test box.

2. The test device for electrical conductivity of composite materials according to claim 1, characterized in that: A tester is arranged on the top of the test box, both sides of the tester are connected with connecting wires, one end of the connecting wire is electrically connected with a circuit board, and a signal bulb is arranged on the circuit board.

3. The test device for electrical conductivity of composite materials according to claim 2, characterized in that: A wire receiving box is fixedly connected to both sides of the top of the inner wall of the test box, a rotating shaft is rotatably connected to the back of the inner wall of the wire receiving box, a front end of the rotating shaft passes through the wire receiving box and extends to the outside of the wire receiving box, and a rotating disk is fixedly connected to one end of the rotating shaft extending to the outside of the wire receiving box.

4. The test device for electrical conductivity of composite materials according to claim 3, characterized in that: A winding disk is fixedly connected inside the wire receiving box and on the outer surface of the rotating shaft. The bottom end of the connecting wire passes through the test box and the wire receiving box in sequence and extends to the inside of the wire receiving box. One end of the connecting wire extending to the inside of the wire receiving box is wound around the outer surface of the winding disk.

5. The test device for electrical conductivity of composite materials according to claim 3, characterized in that: The bottom of the wire receiving box is provided with an opening, and the free end of the connecting wire passes through the opening and extends to the bottom of the opening.

6. The test device for electrical conductivity of composite materials according to claim 1, characterized in that: The bottom of the inner wall of the test box is fixedly connected with an operating table, and transparent covers for observation are arranged on both sides of the front of the test box.

7. The test device for electrical conductivity of composite materials according to claim 6, characterized in that: A sliding groove is provided on the front of the operating table, a sliding plate is slidably connected between the two sides of the sliding groove, an auxiliary table is fixedly connected to one side of the sliding plate, a groove is provided on the auxiliary table, a displacement block is slidably connected between the two sides of the groove, and a clamping plate for fixing the composite material is fixedly connected to one side of the displacement block.

8. The test device for electrical conductivity of composite materials according to claim 7, characterized in that: A limit spring is arranged on the other side of the displacement block, and one end of the limit spring is arranged on one side inside the groove.

9. The test device for electrical conductivity of composite materials according to claim 7, characterized in that: A locking groove is provided at the bottom of the sliding groove, a protrusion is slidably connected between the two sides inside the locking groove, a compression spring is provided on one side of the protrusion, and the bottom end of the compression spring is provided at the bottom of the inner wall of the locking groove.

10. The test device for electrical conductivity of composite materials according to claim 9, characterized in that: A clamping groove is formed at the bottom of the auxiliary platform, and the top end of the protruding piece passes through the clamping groove and extends to the inside of the clamping groove.

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