Withstand voltage tester for high-temperature film on outer layer of three-layer insulated wire

Abstract

The invention relates to the technical field of voltage withstanding testing, and discloses a three-layer insulated wire outer layer high temperature film voltage withstanding tester which comprises a transverse outer shell, the top of the transverse outer shell is fixedly connected with a vertical outer shell, the interior of the vertical outer shell is fixedly connected with a wire conduit, and the interior of the transverse outer shell is fixedly connected with an inner protection tube. A guide mechanism, a temperature difference resistance detection mechanism and a first heating mechanism are sequentially arranged in the inner protection pipe; through the arrangement of the first heating mechanism and the guide mechanism, in the withstand voltage detection process, the insulated wire is conveniently and directly heated, and then the withstand voltage performance of the insulated wire is tested after the insulated wire is bent, so that the diversity of insulated wire tests, including a conventional state test and a bending test after high temperature resistance, is increased, and the test efficiency is improved. Therefore, the accuracy of the withstand voltage test of the insulated wire is effectively ensured, the trouble that the withstand voltage test is performed after manual heating and bending processing can be avoided, and the efficiency of the withstand voltage test of the insulated wire is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of withstand voltage testing, in particular to a withstand voltage tester for a high-temperature film of an outer layer of a three-layer insulation wire. Background Art

[0002] In the production process of insulated wires, multi-strand twisted enameled wire core three-layer insulated wires are mostly extruded and coated on the enameled twisted wire core with a temperature-resistant 130-grade PET+PA rubber compound. However, the current products are severely cracked after being baked in an oven at 245°C for 40 minutes and then taken out and bent at an angle of 180 degrees. Therefore, in order to ensure the production quality of the insulated wires, it is necessary to bake the insulated wires in an oven at 245°C for 40 minutes, take them out and bend them, and then conduct a withstand voltage test to determine the quality of the existing insulated wires.

[0003] However, the existing insulation wire withstand voltage test device often directly performs the withstand voltage test on the insulation wire, and is unable to perform the withstand voltage test on the insulation layer of the insulation wire after passing through the harsh environment, resulting in unsatisfactory test results of the existing withstand voltage test device. In order to achieve the withstand voltage test in the harsh environment, it is necessary to manually simulate the environment of the insulation wire, and then test it through the withstand voltage test device, which makes the test process complicated and affects the test efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a three-layer insulated wire outer layer high temperature film withstand voltage tester, which has the advantages of improving test efficiency, reducing test difficulty, and being able to directly perform diversified tests on insulated wires.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A three-layer insulated wire outer layer high temperature film withstand voltage tester, comprising a horizontal outer shell, the top of the horizontal outer shell is fixedly connected to a vertical outer shell, the inside of the vertical outer shell is fixedly connected to a wire tube, the inside of the horizontal outer shell is fixedly connected to an inner protective tube, and the inside of the inner protective tube is sequentially provided with a guide mechanism, an anti-temperature difference detection mechanism and a first heating mechanism;

[0007] The guide mechanism is arranged below the wire outlet of the wire tube, and is used to guide the insulating wire to bend, and control the insulating wire to bend 90 degrees after passing through the guide mechanism and enter the interior of the anti-temperature difference detection mechanism;

[0008] The anti-temperature difference detection mechanism is used for sliding connection to the inside of the inner protective tube, and the anti-temperature difference detection mechanism is used for the pressure resistance test of the outer high-temperature film of the insulated wire after the cold and hot alternation.

[0009] Preferably: a protective ring is fixedly connected to the top of the vertical outer shell, a wire inlet is fixedly connected to the top of the wire tube, the protective ring surrounds the outside of the wire inlet, the wire tube extends downward to the inside of the inner protective tube, and an insulating cavity is arranged between the horizontal outer shell and the inner protective tube.

[0010] Preferably, a regulating pump is fixedly connected to the outside of the transverse outer shell, and the regulating pump includes an adjusting rod, which extends to the inside of the inner protective tube. The regulating pump drives the anti-temperature difference detection mechanism to slide inside the inner protective tube through the adjusting rod.

[0011] Preferably: the anti-temperature difference detection mechanism includes a movable detection chamber, the outer wall of the movable detection chamber and the inner wall of the inner protective tube fit and slide, the inner wall of the inner protective tube is fixedly connected with a limit ring for limiting the sliding range of the movable detection chamber, the limit ring is arranged between the anti-temperature difference detection mechanism and the guide mechanism, the interior of the movable detection chamber is fixedly connected with four heat insulation plates, the four heat insulation plates divide the movable detection chamber into two temperature control chambers, the shaft of the heat insulation plate is provided with a through opening, the interior of the through opening is provided with a sealing film, the two temperature control chambers of the movable detection chamber are respectively provided with a first semiconductor thermoelectric cooling plate and a second semiconductor thermoelectric cooling plate, and the two temperature control chambers of the movable detection chamber are both provided with a positioning mechanism.

[0012] Preferably, the cooling surface and the heating surface of the first semiconductor thermoelectric cooling sheet and the second semiconductor thermoelectric cooling sheet are arranged oppositely, so that the two temperature control cavities of the movable detection chamber form a heating cavity and a cooling cavity respectively.

[0013] Preferably: the positioning mechanism includes a fixed ring fixedly connected to the inside of the movable detection chamber, the outside of the fixed ring is fixedly connected to a fixed support, the outside of the fixed support is fixedly connected to a positioning rod, the outside of the positioning rod is fixedly connected to a conical wire bucket, the narrow end of the conical wire bucket is fixedly connected to a positioning rubber sleeve, the inside of the positioning rubber sleeve is fixedly connected to a plurality of conductive rings, the plurality of conductive rings are electrically connected to each other, and the conductive rings are electrically connected to an external power distribution system.

[0014] Preferably: the outside of the positioning rubber sleeve is fixedly connected with a clamping rod, the end of the clamping rod away from the positioning rubber sleeve is rotatably connected to the fixed support, the end of the clamping rod away from the positioning rubber sleeve is rotatably connected to a driving rod, the driving rod is located on the outside of the connection point between the clamping rod and the fixed support, the end of the driving rod away from the clamping rod is rotatably connected to an electric drive push ring, and the electric drive push ring is slidably connected to the outside of the fixed support.

[0015] Preferably: the guiding mechanism includes a lifting drive fixedly connected to the inside of the transverse outer shell, the lifting end of the lifting drive is fixedly connected to a movable U-shaped plate, the movable U-shaped plate is movable inside the inner protective tube, the movable U-shaped plate is internally movably connected to a guide wheel, the movable U-shaped plate is internally rotatably connected to a wire pressing wheel, a wire pressing plate is arranged above the guide wheel, the wire pressing plate is fixedly connected to the inside of the inner protective tube, the wire pressing plate is located below the wire outlet of the wire tube, and a folded arc opening is opened at the lower end of the wire pressing plate.

[0016] Preferably: the shaft of the guide wheel is rotatably connected to a movable shaft, the movable shaft is slidably connected to the inside of the movable U-shaped plate, the inside of the movable U-shaped plate is fixedly connected to a sliding rod, the movable shaft is slidably connected to the outside of the sliding rod, and a return spring is arranged between the movable shaft and the movable U-shaped plate.

[0017] Preferably: the first heating mechanism and the inner protective tube are arranged to be detachable, the first heating mechanism comprises a fan, a heating wire, a filter and an isolation plate, the isolation plate, the heating wire, the fan and the filter are installed in sequence from the inside to the outside, and the first heating mechanism is used to heat the insulated wire at the guide mechanism position.

[0018] Beneficial effects of the present invention:

[0019] 1. The three-layer insulated wire outer layer high temperature film withstand voltage tester is provided with a first heating mechanism and a guide mechanism, so that during the withstand voltage test process, it is convenient to directly heat the insulated wire, and then test the withstand voltage performance of the insulated wire after bending, thereby increasing the diversity of the insulated wire test, including conventional state test and high temperature resistance after bending test, so as to effectively ensure the accuracy of the withstand voltage test of the insulated wire, and can avoid the trouble of manual heating and bending, and then conducting the withstand voltage test, and perform it in one step, thereby effectively improving the efficiency of the withstand voltage test of the insulated wire.

[0020] 2. The three-layer insulated wire outer layer high temperature film withstand voltage tester is provided with a transverse outer shell and an inner protective tube, and a heat insulation cavity is formed between the transverse outer shell and the inner protective tube, thereby effectively avoiding high temperature from causing damage to the staff during the simulation process of heating or temperature change of the insulated wire, and improving the safety of the device detection process. At the same time, the wire tube and the inner protective tube are in a vertical relationship, and the insulated wire is bent 90° at the position of the guide mechanism, and the first heating mechanism is directly opposite to the bending position of the insulated wire, and the insulated wire is bent 180° at this position, so as to facilitate direct heating of the folded part of the insulated wire, and effectively ensure the heating effect.

[0021] 3. The three-layer insulated wire outer layer high-temperature film withstand voltage tester is equipped with a heating chamber and a cooling chamber through a movable detection chamber, and the heating chamber and the cooling chamber are provided with a first semiconductor thermoelectric cooling plate and a second semiconductor thermoelectric cooling plate, thereby effectively ensuring the accuracy of temperature control inside the heating chamber and the cooling chamber, and by separately setting the heating chamber and the cooling chamber, by alternately switching between the heating chamber and the cooling chamber at the same insulating wire position, the efficiency of switching between high and low temperature environments of the insulating wire is effectively improved, and the energy loss of switching between high and low temperature environments is reduced, and at the same time, it is convenient for the synchronous testing of the insulation layer of the insulating wire to resist high temperature and temperature difference changes, which not only effectively guarantees the diversified testing effect of the insulating wire, but also can effectively improve the withstand voltage test efficiency of the insulating wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall exterior of the insulated wire detection clamping part of the present invention;

[0023] Figure 2 It is a cross-sectional schematic diagram of the detection clamping part of the present invention;

[0024] Figure 3 It is a schematic diagram of the regulating pump, regulating rod and anti-temperature difference detection mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the state in which the first heating mechanism of the present invention is installed inside the inner protection tube;

[0026] Figure 5 It is a schematic diagram of the guide mechanism of the present invention;

[0027] Figure 6 This is a schematic diagram of the first heating mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the temperature difference resistance detection mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the positioning mechanism of the present invention.

[0030] In the figure: 1, horizontal outer shell; 2, vertical outer shell; 3, wire tube; 31, wire inlet; 4, protective ring; 5, inner protective tube; 6, guide mechanism; 7, anti-temperature difference detection mechanism; 8, regulating pump; 81, regulating rod; 9, first heating mechanism; 10, heat insulation cavity; 11, limit ring;

[0031] 61. Lifting drive; 62. Movable U-shaped plate; 63. Guide wheel; 64. Wire pressing wheel; 65. Wire pressing plate; 66. Folding arc; 631. Movable shaft; 632. Sliding rod; 633. Return spring;

[0032] 71. movable detection chamber; 72. heat insulation board; 73. sealing film; 74. positioning mechanism; 75. first semiconductor thermoelectric cooling sheet; 76. second semiconductor thermoelectric cooling sheet;

[0033] 741, fixing ring; 742, fixing support; 743, positioning rod; 744, conical wire bucket; 745, positioning rubber sleeve; 746, conductive ring; 747, clamping rod; 748, driving rod; 749, electric drive push ring;

[0034] 91. Fan; 92. Heating wire; 93. Filter; 94. Isolation plate. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] See also Figure 1 - Figure 4 , Figure 6 A three-layer insulated wire outer layer high temperature film withstand voltage tester, comprising a horizontal outer shell 1, a vertical outer shell 2 is fixedly connected to the top of the horizontal outer shell 1, a wire tube 3 is fixedly connected inside the vertical outer shell 2, an inner protective tube 5 is fixedly connected inside the horizontal outer shell 1, and a guide mechanism 6, an anti-temperature difference detection mechanism 7 and a first heating mechanism 9 are sequentially arranged inside the inner protective tube 5;

[0038] The guide mechanism 6 is arranged below the outlet of the wire tube 3, and is used to guide the insulating wire to bend, and controls the insulating wire to bend 90 degrees after passing through the guide mechanism 6 and enter the interior of the anti-temperature difference detection mechanism 7;

[0039] The temperature difference resistance detection mechanism 7 is used for being slidably connected to the inside of the inner protective tube 5, and the temperature difference resistance detection mechanism 7 is used for the pressure resistance test of the outer high temperature film of the insulated wire after the alternation of hot and cold.

[0040] refer to Figure 6 , wherein the first heating mechanism 9 and the inner protective tube 5 are arranged to be detachably installed, the first heating mechanism 9 comprises a fan 91, a heating wire 92, a filter screen 93 and an isolation plate 94, the isolation plate 94, the heating wire 92, the fan 91 and the filter screen 93 are installed in sequence from the inside to the outside, and the first heating mechanism 9 is used to heat the insulated wire at the position of the guide mechanism 6.

[0041] During the withstand voltage test of the insulated wire, the insulated wire enters from the wire tube 3, passes through the guide mechanism 6, is bent 90°, and then enters the inner protective tube 5. The insulated wire passes through the anti-temperature difference detection mechanism 7 in the inner protective tube 5, and then extends out from the wire outlet of the inner protective tube 5.

[0042] After the preliminary installation of the insulated wire is completed, the first heating mechanism 9 can be installed inside the inner protective tube 5, thereby completing the assembly work of the insulated wire before the withstand voltage test of the insulated wire.

[0043] During testing, the insulated wire is connected to the power supply system of the withstand voltage testing device. The system controls the power supply and voltage, and the voltage change is adjusted according to the actual testing range.

[0044] It should be noted that the guide mechanism 6 also includes a device for bending the insulated wire by 180°.

[0045] The detection process also includes heating the insulated wire at the bend of the guide mechanism 6 by the first heating mechanism 9, the heating temperature range is 235℃~255℃, then controlling cooling to room temperature, and then controlling the insulated wire to bend to 180° by the guide mechanism 6, and then performing a withstand voltage test on the insulated wire after recovery.

[0046] By setting the first heating mechanism 9 and the guide mechanism 6, it is convenient to directly heat the insulated wire during the withstand voltage test, and then test the withstand voltage performance of the insulated wire after bending, thereby increasing the diversity of the insulation wire test, including conventional state test and high temperature resistance after bending test, thereby effectively ensuring the accuracy of the withstand voltage test of the insulation wire, and avoiding the trouble of manual heating and bending, and then conducting the withstand voltage test, and performing it in one integrated manner, thereby effectively improving the efficiency of the withstand voltage test of the insulation wire.

[0047] refer to Figure 2 In an optional embodiment: a protective ring 4 is fixedly connected to the top of the vertical outer shell 2, a wire inlet 31 is fixedly connected to the top of the wire tube 3, the protective ring 4 surrounds the outside of the wire inlet 31, the wire tube 3 extends downward to the inside of the inner protective tube 5, and an insulating cavity 10 is arranged between the horizontal outer shell 1 and the inner protective tube 5.

[0048] It should be noted that by providing the transverse outer shell 1 and the inner protective tube 5, and forming an insulating cavity 10 between the transverse outer shell 1 and the inner protective tube 5, it is effectively avoided that high temperature causes damage to the workers during the simulation process of heating the insulated wire or temperature changes, thereby improving the safety of the detection process of the device.

[0049] At the same time, the wire tube 3 and the inner protective tube 5 are in a vertical relationship, and the insulating wire is bent 90° at the position of the guide mechanism 6, and the first heating mechanism 9 is directly opposite to the bending position of the insulating wire, and the insulating wire is bent 180° at this position at the same time, thereby facilitating direct heating of the folded part of the insulating wire and effectively ensuring the heating effect.

[0050] refer to Figure 2 and Figure 3 In an optional embodiment: the outside of the transverse outer shell 1 is fixedly connected with a regulating pump 8, the regulating pump 8 includes an adjusting rod 81, the adjusting rod 81 extends to the inside of the inner protective tube 5, and the regulating pump 8 drives the anti-temperature difference detection mechanism 7 to slide inside the inner protective tube 5 through the adjusting rod 81.

[0051] It should be noted that the temperature difference resistance detection mechanism 7 is used to heat or cool the insulation layer of the insulated wire, so that the insulated wire is in an environment with high and low temperature changes, and then a withstand voltage test is performed on the area where the temperature difference changes.

[0052] The regulating pump 8 is used to control the movement of the anti-temperature difference detection mechanism 7 inside the inner protective tube 5 through the adjusting rod 81, so that the anti-temperature difference detection mechanism 7 can alternately heat or cool the same position of the insulating wire, effectively improving the efficiency of switching between high and low temperature environments of the insulating wire, and thereby improving the efficiency of the withstand voltage test of the insulating wire.

[0053] Embodiment 2

[0054] refer to Figure 7 and Figure 8 In an optional embodiment: the anti-temperature difference detection mechanism 7 includes an active detection chamber 71, the outer wall of the active detection chamber 71 and the inner wall of the inner protective tube 5 fit and slide, the inner wall of the inner protective tube 5 is fixedly connected with a limit ring 11 for limiting the sliding range of the active detection chamber 71, the limit ring 11 is arranged between the anti-temperature difference detection mechanism 7 and the guide mechanism 6, the interior of the active detection chamber 71 is fixedly connected with four heat insulation plates 72, the four heat insulation plates 72 divide the active detection chamber 71 into two temperature control chambers, the shaft of the heat insulation plate 72 is provided with a through opening, the interior of the through opening is provided with a sealing film 73, the interiors of the two temperature control chambers of the active detection chamber 71 are respectively provided with a first semiconductor thermoelectric cooling plate 75 and a second semiconductor thermoelectric cooling plate 76, and the interiors of the two temperature control chambers of the active detection chamber 71 are both provided with a positioning mechanism 74.

[0055] It should be noted that the active detection chamber 71 is configured to be made of thermal insulation material, and the insulation board 72 is configured to be made of thermal insulation material, so that the internal temperatures of the two temperature control chambers of the active detection chamber 71 can remain relatively isolated and independent, effectively reducing the heat exchange efficiency of the two temperature control chambers, and when the insulating wire passes through the two temperature control chambers of the two active detection chambers 71, the insulating wire passes through the sealing film 73, and the sealing film 73 effectively reduces the air flow between the temperature control chamber and the outside, further reducing the heat exchange between the temperature control chamber and the outside, thereby effectively reducing energy waste and achieving the effect of energy-saving control of temperature control changes.

[0056] The cooling surface and the heating surface of the first semiconductor thermoelectric cooling sheet 75 and the second semiconductor thermoelectric cooling sheet 76 are oppositely arranged, so that the two temperature control chambers of the active detection chamber 71 form a heating chamber and a cooling chamber respectively.

[0057] It should be noted that since the cooling surface and the heating surface of the first semiconductor thermoelectric cooling sheet 75 and the second semiconductor thermoelectric cooling sheet 76 are arranged oppositely, the inside of the insulation cavity 10 is simultaneously affected by the opposite temperature control effects of the first semiconductor thermoelectric cooling sheet 75 and the second semiconductor thermoelectric cooling sheet 76, so that the gas in the insulation cavity 10 tends to room temperature, effectively reducing the impact on the outside world when the temperature changes, and improving the temperature insulation effect of the insulation cavity 10.

[0058] It should be noted that the movable detection chamber 71 is set as a heating chamber near the first heating mechanism 9, so that a hot air flow is generated in the first heating mechanism 9 and blown toward the heating chamber, so that the heating chamber can utilize the residual heating temperature of the first heating mechanism 9, which facilitates the heating chamber to reach the set temperature faster, thereby reducing energy loss caused by temperature changes.

[0059] The test process of the insulation layer of the insulated wire against high temperature and temperature difference is as follows:

[0060] During the high temperature resistance test of the high temperature film on the outer layer of the insulating wire, the first semiconductor thermoelectric cooling sheet 75 inside the heating cavity is controlled to operate, so that the heating cavity of the movable detection chamber 71 produces a high temperature environment, and then the external power supply system is controlled to operate to perform a withstand voltage test to complete the high temperature resistance test of the high temperature film on the outer layer of the insulating wire.

[0061] When testing the resistance of the outer high-temperature film of the insulating wire to temperature difference changes, the first semiconductor thermoelectric cooling plate 75 and the second semiconductor thermoelectric cooling plate 76 inside the two temperature control cavities of the active detection chamber 71 are controlled to work alternately, and the regulating pump 8 is controlled to work at the same time. The regulating pump 8 drives the active detection chamber 71 to move through the adjusting rod 81, so that the first semiconductor thermoelectric cooling plate 75 and the second semiconductor thermoelectric cooling plate 76 alternately form a high-temperature environment and a low-temperature environment at the same position of the insulating wire, so that the position to be detected of the insulating wire alternately experiences the high-temperature environment and the low-temperature environment, and then the withstand voltage test of the insulating wire is carried out to complete the test of the resistance of the insulating wire to temperature difference changes.

[0062] refer to Figure 8 In an optional embodiment: the positioning mechanism 74 includes a fixed ring 741 fixedly connected to the inside of the movable detection chamber 71, the outside of the fixed ring 741 is fixedly connected to a fixed support 742, the outside of the fixed support 742 is fixedly connected to a positioning rod 743, the outside of the positioning rod 743 is fixedly connected to a conical wire bucket 744, the narrow end of the conical wire bucket 744 is fixedly connected to a positioning rubber sleeve 745, the inside of the positioning rubber sleeve 745 is fixedly connected to a plurality of conductive rings 746, the plurality of conductive rings 746 are electrically connected to each other, and the conductive rings 746 are electrically connected to an external power distribution system.

[0063] It should be noted that during the testing process, the insulated wire passes through the fixed ring 741, the fixed support 742 and the conical conductor bucket 744, and then passes through the positioning rubber sleeve 745. The conductive ring 746 inside the positioning rubber sleeve 745 is used to assist the withstand voltage test of the insulated wire. The conductive ring 746 replaces the transmission probe for testing, thereby effectively improving the accuracy of the withstand voltage test of the insulated wire, and the positioning rubber sleeve 745 effectively ensures the contact effect between the conductive ring 746 and the insulated wire, thereby ensuring the stability of the withstand voltage test of the insulated wire.

[0064] In an optional embodiment: the outside of the positioning rubber sleeve 745 is fixedly connected with a clamping rod 747, and the end of the clamping rod 747 away from the positioning rubber sleeve 745 is rotatably connected to the fixed support 742, and the end of the clamping rod 747 away from the positioning rubber sleeve 745 is rotatably connected to a driving rod 748, and the driving rod 748 is located on the outside of the connection point between the clamping rod 747 and the fixed support 742, and the end of the driving rod 748 away from the clamping rod 747 is rotatably connected to an electric drive push ring 749, and the electric drive push ring 749 is slidably connected to the outside of the fixed support 742.

[0065] It should be noted that by controlling the electric drive push ring 749 to slide outside the fixed support 742, the electric drive push ring 749 can drive the clamping rod 747 to expand or contract through the driving rod 748, so that the clamping rod 747 drives the positioning rubber sleeve 745 to expand or contract.

[0066] By driving the positioning rubber sleeve 745 to fix the insulated wire through the clamping rod 747, it can be ensured that the positioning rubber sleeve 745 maintains a stable pressure on the insulated wire, thereby ensuring the contact effect between the conductive ring 746 and the insulated wire, and further improving the stability of the insulation wire withstand voltage test.

[0067] refer to Figure 2 During the specific test, the middle section of the insulating wire located inside the inner protective tube 5 is used for the temperature difference resistance test of the outer high-temperature film of the insulating wire, and the right section of the insulating wire located inside the inner protective tube 5 is used for the high-temperature resistance test of the outer high-temperature film of the insulating wire (only the middle section and the right section will be used later).

[0068] During the test, when the active detection chamber 71 is located at the right end of the inner protective tube 5, the heating chamber of the active detection chamber 71 heats the right section of the insulating wire, and the cooling chamber of the active detection chamber 71 cools the middle section of the insulating wire, and simultaneously forms a high temperature environment for the right section of the insulating wire and a low temperature environment for the middle section of the insulating wire. When the first semiconductor thermoelectric cooling sheet 75 and the second semiconductor thermoelectric cooling sheet 76 control the specified temperature, and the insulation reaches the specified time (the specified temperature and the specified time are determined and controlled by the withstand voltage measurement system according to the specifications of the insulating wire), then the regulating pump 8 controls the active detection chamber 71 to move to the left side of the inner protective tube 5 through the regulating rod 81. At this time, the second semiconductor thermoelectric cooling sheet 76 can stop working, and the first semiconductor thermoelectric cooling sheet 75 continues to work until the middle section of the insulating wire is in a high temperature environment. The active detection chamber 71 is alternately controlled to move left and right inside the inner protective tube 5, thereby completing the high and low temperature alternating switching of the middle section of the insulating wire environment, and the continuous detection of the high temperature environment of the right section of the insulating wire.

[0069] During detection, the movable detection chamber 71 is located at the right side of the inner protection tube 5 , and the clamping rod 747 is located outside the clamping and fixing positioning rubber sleeve 745 .

[0070] When the movable detection chamber 71 moves, the clamping rod 747 drives the positioning rubber sleeve 745 to be in an expanded state.

[0071] A heating chamber and a cooling chamber are provided at the same time through the movable detection chamber 71, and a first semiconductor thermoelectric cooling plate 75 and a second semiconductor thermoelectric cooling plate 76 are provided inside the heating chamber and the cooling chamber, thereby effectively ensuring the accuracy of temperature control inside the heating chamber and the cooling chamber, and by separately providing a heating chamber and a cooling chamber, by alternately switching between the heating chamber and the cooling chamber at the same insulating line position, the efficiency of switching between high and low temperature environments of the insulating line is effectively improved, and the energy loss of switching between high and low temperature environments is reduced, while facilitating the synchronous testing of the insulation layer of the insulating line against high temperature and temperature difference changes, which not only effectively guarantees the diversified testing effect of the insulating line, but also can effectively improve the efficiency of the withstand voltage test of the insulating line.

[0072] Embodiment 3

[0073] refer to Figure 4 and Figure 5 In an optional embodiment: the guide mechanism 6 includes a lifting drive 61 fixedly connected to the inside of the transverse outer shell 1, the lifting end of the lifting drive 61 is fixedly connected to a movable U-shaped plate 62, the movable U-shaped plate 62 is movable inside the inner protective tube 5, the inside of the movable U-shaped plate 62 is movably connected to a guide wheel 63, the inside of the movable U-shaped plate 62 is rotatably connected to a wire pressing wheel 64, a wire pressing plate 65 is arranged above the guide wheel 63, the wire pressing plate 65 is fixedly connected to the inside of the inner protective tube 5, the wire pressing plate 65 is located below the wire outlet of the wire tube 3, and the lower end of the wire pressing plate 65 is provided with a folded arc opening 66.

[0074] Among them, the shaft of the guide wheel 63 is rotatably connected to a movable shaft 631, the movable shaft 631 is slidably connected to the inside of the movable U-shaped plate 62, the inside of the movable U-shaped plate 62 is fixedly connected to a sliding rod 632, the movable shaft 631 is slidably connected to the outside of the sliding rod 632, and a return spring 633 is arranged between the movable shaft 631 and the movable U-shaped plate 62.

[0075] It should be noted that the guide wheel 63 is used to guide the direction of the insulated wire when it turns 90 degrees, and the insulated wire passes between the guide wheel 63 and the wire pressing wheel 64 and enters the interior of the anti-temperature difference detection mechanism 7.

[0076] When it is necessary to perform anti-bending test on the insulated wire after high temperature, the fan 91 is started, the insulated wire blows airflow, and the heating wire 92 heats the airflow. The insulated wire is heated by the high-temperature airflow so that the insulated wire is in the temperature range of 235°C to 255°C for 30 to 50 minutes. Then the lifting drive 61 is controlled to drive the movable U-shaped plate 62 to move upward, so that the wire pressing wheel 64 pushes the insulated wire to deflect upward, and the insulated wire is controlled to be folded at the folding arc 66 of the wire pressing plate 65, so that the insulated wire is folded 180°. At the same time, the side of the guide wheel 63 abuts against the side of the wire pressing plate 65, and the guide wheel 63 is provided with pressure by the reset spring 633. When the bending is completed, the movable U-shaped plate 62 is controlled to move downward to restore the insulated wire to the 90° bent state.

[0077] Among them, the insulated wire is elastically connected to the external wiring device at one end of the outlet of the inner protective tube 5, so that the insulated wire can complete a 180° bending action, and can control the insulated wire to return to a 90° bend, and can keep the insulated wire in a taut state.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-layer insulated wire outer layer high temperature film withstand voltage tester, comprising a horizontal outer shell (1), the top of the horizontal outer shell (1) is fixedly connected to a vertical outer shell (2), and the interior of the vertical outer shell (2) is fixedly connected to a wire tube (3), characterized in that: The interior of the transverse outer shell (1) is fixedly connected with an inner protective tube (5), and the interior of the inner protective tube (5) is provided with a guide mechanism (6), an anti-temperature difference detection mechanism (7) and a first heating mechanism (9) in sequence; The guide mechanism (6) is arranged below the wire outlet of the wire tube (3), and is used to guide the insulating wire to bend, and controls the insulating wire to bend 90 degrees after passing through the guide mechanism (6) and enter the interior of the anti-temperature difference detection mechanism (7); The anti-temperature difference detection mechanism (7) is used for being slidably connected to the inside of the inner protective tube (5), and the anti-temperature difference detection mechanism (7) is used for the pressure resistance test of the outer high-temperature film of the insulated wire after the alternation of hot and cold.

2. A three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 1, characterized in that: A protective ring (4) is fixedly connected to the top of the vertical outer shell (2), a wire inlet (31) is fixedly connected to the top of the wire tube (3), the protective ring (4) surrounds the outside of the wire inlet (31), the wire tube (3) extends downward to the inside of the inner protective tube (5), and an insulating cavity (10) is provided between the horizontal outer shell (1) and the inner protective tube (5).

3. The three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 1, characterized in that: The outside of the transverse outer shell (1) is fixedly connected to a regulating pump (8), the regulating pump (8) comprising an regulating rod (81), the regulating rod (81) extending into the interior of the inner protective tube (5), and the regulating pump (8) drives the anti-temperature difference detection mechanism (7) to slide inside the inner protective tube (5) via the regulating rod (81).

4. The three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 1, characterized in that: The anti-temperature difference detection mechanism (7) comprises a movable detection chamber (71), the outer wall of the movable detection chamber (71) and the inner wall of the inner protection tube (5) are fitted and slidably connected, the inner wall of the inner protection tube (5) is fixedly connected with a limit ring (11) for limiting the sliding range of the movable detection chamber (71), and the limit ring (11) is arranged between the anti-temperature difference detection mechanism (7) and the guide mechanism (6), the interior of the movable detection chamber (71) is fixedly connected with four heat insulation plates (72), the four heat insulation plates (72) divide the movable detection chamber (71) into two temperature control chambers, the shaft of the heat insulation plate (72) is provided with a through hole, and a sealing film (73) is arranged inside the through hole, the two temperature control chambers of the movable detection chamber (71) are respectively provided with a first semiconductor thermoelectric cooling plate (75) and a second semiconductor thermoelectric cooling plate (76), and the two temperature control chambers of the movable detection chamber (71) are both provided with a positioning mechanism (74).

5. The three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 4, characterized in that: The cooling surface and the heating surface of the first semiconductor thermoelectric cooling sheet (75) and the second semiconductor thermoelectric cooling sheet (76) are arranged oppositely, so that the two temperature control chambers of the active detection chamber (71) form a heating chamber and a cooling chamber respectively.

6. A three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 4, characterized in that: The positioning mechanism (74) comprises a fixing ring (741) fixedly connected to the inside of the movable detection chamber (71); the outside of the fixing ring (741) is fixedly connected to a fixing support (742); the outside of the fixing support (742) is fixedly connected to a positioning rod (743); the outside of the positioning rod (743) is fixedly connected to a conical wire bucket (744); the narrow end of the conical wire bucket (744) is fixedly connected to a positioning rubber sleeve (745); the inside of the positioning rubber sleeve (745) is fixedly connected to a plurality of conductive rings (746); the plurality of conductive rings (746) are electrically connected to each other; and the conductive rings (746) are electrically connected to an external power distribution system.

7. A three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 6, characterized in that: The outside of the positioning rubber sleeve (745) is fixedly connected with a clamping rod (747), and one end of the clamping rod (747) away from the positioning rubber sleeve (745) is rotatably connected to the fixed support (742), and one end of the clamping rod (747) away from the positioning rubber sleeve (745) is rotatably connected to a driving rod (748), and the driving rod (748) is located on the outside of the connection point between the clamping rod (747) and the fixed support (742), and one end of the driving rod (748) away from the clamping rod (747) is rotatably connected to an electric drive push ring (749), and the electric drive push ring (749) is slidably connected to the outside of the fixed support (742).

8. The three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 1, characterized in that: The guide mechanism (6) comprises a lifting drive (61) fixedly connected to the inside of the transverse outer shell (1); the lifting end of the lifting drive (61) is fixedly connected to a movable U-shaped plate (62); the movable U-shaped plate (62) is movable inside the inner protective tube (5); the movable U-shaped plate (62) is movably connected to a guide wheel (63); the movable U-shaped plate (62) is rotatably connected to a wire pressing wheel (64); a wire pressing plate (65) is arranged above the guide wheel (63); the wire pressing plate (65) is fixedly connected to the inside of the inner protective tube (5); the wire pressing plate (65) is located below the wire outlet of the wire tube (3); and a broken line arc opening (66) is opened at the lower end of the wire pressing plate (65).

9. The three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 8, characterized in that: The shaft of the guide wheel (63) is rotatably connected to a movable shaft (631), the movable shaft (631) is slidably connected to the inside of the movable U-shaped plate (62), the inside of the movable U-shaped plate (62) is fixedly connected to a sliding rod (632), the movable shaft (631) is slidably connected to the outside of the sliding rod (632), and a return spring (633) is provided between the movable shaft (631) and the movable U-shaped plate (62).

10. The three-layer insulated wire outer layer high temperature film withstand voltage tester according to claim 1, characterized in that: The first heating mechanism (9) and the inner protective tube (5) are arranged to be detachably installed. The first heating mechanism (9) comprises a fan (91), a heating wire (92), a filter screen (93) and an isolation plate (94). The isolation plate (94), the heating wire (92), the fan (91) and the filter screen (93) are installed in sequence from the inside to the outside. The first heating mechanism (9) is used to heat the insulated wire at the position of the guide mechanism (6).

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