Composite breakdown withstand voltage test structure for insulating material

Abstract

The invention relates to the technical field of breakdown voltage resistance testing of insulating materials, and discloses a composite breakdown voltage resistance testing structure for insulating materials, which comprises a driving assembly and a testing box arranged at the top end of the driving assembly, and is characterized in that a cabinet door is hinged to the testing box; a detection device body and a test power supply are fixedly mounted on a bottom plate on the inner wall of the test box, the driving assembly comprises a conveying belt, two guide plates are arranged above the conveying belt, and an adjustable structure is arranged between the two guide plates and the driving assembly and used for adjusting the distance between the two guide plates. A sliding groove is formed in the inner wall of the guide plate. According to the technical scheme, in the power-on detection process, after the metal conductive plates on the two sides clamp the insulator and test voltage is removed, the metal conductive plates reset under the action of the springs, the insulator clamped in the middle is loosened, the detected insulator can continue to be conveyed, and the next insulator needing to be detected can be detected conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulation material breakdown voltage test, and particularly relates to a composite breakdown voltage test structure for insulation material. BACKGROUND

[0002] As the core medium for realizing electrical isolation in electrical systems, the performance of insulation materials directly determines the reliability and safety of equipment operation. From the basic function, insulation materials need to have high resistivity, low dielectric loss and excellent mechanical stability to withstand voltage stress and suppress partial discharge. As a typical application form of insulation materials, insulators isolate conductors and support structures through specific structural design (such as umbrella skirt structure, composite outer sleeve, etc.), while also need to consider anti-pollution flashover, anti-aging and environmental adaptability. Modern insulators have developed from traditional porcelain and glass materials to composite materials. Through nano modification or gradient structure design, materials such as silicone rubber and epoxy resin have significantly improved the insulation performance in extreme weather, high altitude and heavy pollution conditions, and have become the core components in the fields of smart grid and rail transit.

[0003] The breakdown voltage test of insulation materials is a key link for evaluating their electrical strength and failure mechanism. By simulating the electric field distribution under actual working conditions, the tolerance limit of the material under continuous or transient high voltage is quantified. During the test, the sample is placed in a standard electrode system, and AC, DC or impulse voltage is applied. The breakdown field strength is recorded and the damage path is analyzed. Modern testing technology pays more attention to the coupling of multiple factors, such as combining temperature cycling, humidity control or mechanical pre-stress, to simulate the performance degradation process of the material in complex environments. In addition, the introduction of non-destructive testing methods (such as partial discharge monitoring and ultrasonic imaging) enables the test to capture early defect signals before breakdown, providing data support for the life prediction and reliability design of insulation materials, and further optimizing material formulations or process parameters.

[0004] Patent CN207541207U discloses a device for testing the breakdown strength and voltage resistance time of insulation materials under power frequency voltage or DC voltage; specifically, it is a high-temperature air medium voltage withstand test instrument. It includes a device host, a first high-voltage wall-penetrating terminal and a first low-voltage terminal are mounted on the device host, and are connected with a second high-voltage wall-penetrating terminal and a second low-voltage terminal mounted on a high-temperature voltage withstand test device. On the basis of the conventional voltage breakdown host, the high-voltage wall-penetrating terminal and the low-voltage terminal are connected on the host cover, and the high-temperature voltage withstand test device with air as the medium is added. The structure is simple, easy to operate, and the obtained analysis data is reliable.

[0005] The aforementioned patent describes a conventional withstand voltage testing device in the prior art. However, this type of testing is only suitable for small-batch withstand voltage testing. During the testing process, manual loading and unloading of the device is required. Furthermore, the positions and shapes of the wiring holes on both sides of the insulator and other materials are different, requiring different wiring structures for installation and connection, resulting in poor testing efficiency. Summary of the Invention

[0006] Purpose of the invention: The purpose of this invention is to provide a composite breakdown withstand voltage test structure for insulating materials, so as to overcome the above-mentioned shortcomings in the prior art.

[0007] Technical Solution: A composite breakdown withstand voltage test structure for insulating materials includes a drive assembly and a test chamber mounted on top of the drive assembly. The test chamber has a hinged door. A detection device body and a test power supply are fixedly mounted on the bottom plate of the inner wall of the test chamber. The drive assembly includes a conveyor belt with two guide plates above it. An adjustable structure is provided between the two guide plates and the drive assembly to adjust the distance between the two guide plates. A groove is formed on the inner wall of each guide plate. Two metal conductive plates are positioned at one end of the groove near the test chamber. An electromagnetic drive assembly is positioned between the two metal conductive plates and the test power supply.

[0008] As a further description of the above technical solution: the drive assembly includes a frame, two mounting plates are fixedly installed at the top of the frame, electric conveying rollers are provided at both ends of the two mounting plates, and the conveyor belt is installed between the two electric conveying rollers.

[0009] As a further description of the above technical solution: the adjustable structure includes side plates fixedly installed on the top of two mounting plates, and adjusting members are slidably installed on the two side plates. The adjusting members are U-shaped, and the two parallel plates of the adjusting members are fixedly connected to the guide plate.

[0010] As a further description of the above technical solution: bolts are rotatably mounted on the two side plates, and the adjusting member is threadedly connected to the bolts.

[0011] As a further description of the above technical solution: a sliding member is fixedly installed on the two metal conductive plates, one end of the sliding member passes through the guide plate and is fixedly installed with a magnetic block, and the two magnetic blocks are arranged opposite to each other.

[0012] As a further description of the above technical solution: the electromagnetic drive assembly includes an iron core fixedly installed between two mounting plates, a winding coil is wound on the iron core, and the winding coil and two metal conductive plates are connected in parallel by wires.

[0013] Two springs are arranged between each of the two metal conductive plates and the sliding groove.

[0014] Two metal conductive plates are arranged between each of the two metal conductive plates and the sliding groove.

[0015] One of the mounting plates is provided with a step-down rectifier, and the winding coil is connected with the step-down rectifier in series through a wire.

[0016] The iron core is arranged directly below the two magnetic blocks.

[0017] The insulator to be detected is placed between the guide plates of the driving assembly, the wire terminals at both ends of the insulator are clamped into the interior of the sliding groove, the insulator is conveyed by the conveying belt, the two metal conductive plates are electrified by the test power supply when the insulator is conveyed to the position of the two metal conductive plates, meanwhile, the electromagnetic driving assembly can drive the two metal conductive plates to clamp the insulator in the middle, the clamping of the insulator by the two metal conductive plates during the electrification detection is realized, the metal conductive plates are reset under the action of the spring after the test voltage is removed, the insulator clamped in the middle is released, the insulator after the detection is continuously conveyed, and the next insulator to be detected can be conveniently detected. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided.

[0019] Figure 2 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided. Figure 1 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided.

[0020] Figure 3 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided.

[0021] Figure 4 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided.

[0022] Figure 5 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided.

[0023] Figure 6 A three-dimensional structure schematic view of the composite breakdown voltage test structure for insulating materials is provided.

[0024] Figure 7The application is a sectional view structure diagram of the power supply to the iron core after the iron core generates a magnetic field against the magnetic block.

[0025] Legend:

[0026] 1, frame; 2, mounting plate; 3, electric conveying roller; 4, conveying belt; 5, test box; 501, cabinet door; 502, bottom plate; 6, side plate; 7, adjusting part; 8, bolt; 9, guide plate; 10, detection device body; 11, test power supply; 1101, positive electrode; 1102, negative electrode; 12, wire; 13, sliding groove; 14, metal conductive plate; 15, spring; 16, magnetic block; 17, sliding part; 18, iron core; 19, winding coil; 20, voltage reducer. DETAILED DESCRIPTION

[0027] In order to make the technical scheme of the application clearer, the application will be further described in detail below with reference to the drawings and specific embodiments.

[0028] Reference Figures 1-7 A composite breakdown voltage test structure for insulating materials, comprising a driving assembly and a test box 5 arranged at the top end of the driving assembly, a cabinet door 501 is hingedly installed on the test box 5, a detection device body 10 and a test power supply 11 are fixedly installed on the bottom plate 502 of the inner wall of the test box 5, the driving assembly comprises a conveying belt 4, two guide plates 9 are arranged above the conveying belt 4, an adjustable structure is arranged between the two guide plates 9 and the driving assembly for adjusting the distance between the two guide plates 9, a sliding groove 13 is formed in the inner wall of the guide plate 9, two metal conductive plates 14 are arranged at one end of the sliding groove 13 close to the test box 5, and an electromagnetic driving assembly is arranged between the two metal conductive plates 14 and the test power supply 11; the size of the insulator to be detected is adjusted according to the need, the insulator to be detected is placed between the guide plates 9 on the driving assembly, the terminal of the insulator at both ends is clamped into the inside of the sliding groove 13, the insulator is conveyed by the conveying belt 4, when it is conveyed to the position of the two metal conductive plates 14, the test power supply 11 is powered on to the two metal conductive plates 14, at the same time, the electromagnetic driving assembly can drive the two metal conductive plates 14 to clamp in the middle, so that the clamping of the two metal conductive plates 14 on the insulator during the power-on detection is realized, after the test voltage is removed, the metal conductive plates 14 are reset under the action of the spring 15, the insulator clamped in the middle is released, so that the insulator after the detection is continuously conveyed, and the next insulator to be detected is conveniently detected.

[0029] As a preferred technical scheme of the embodiment, the driving assembly comprises a frame body 1, two mounting plates 2 are fixedly installed at the top end of the frame body 1, and electric conveying rollers 3 are arranged at the two ends of the two mounting plates 2, and the conveying belt 4 is drivingly installed between the two electric conveying rollers 3; the electric conveying rollers 3 can drive the conveying belt 4 to convey, which is a prior art and will not be described in detail.

[0030] As a preferred technical scheme of the embodiment, the adjustable structure comprises side plates 6 fixedly installed at the top end of the two mounting plates 2, and adjusting members 7 are slidingly installed on the two side plates 6, the adjusting members 7 are in the shape of a Chinese character and parallel two plate members are fixedly connected with guide plates 9.

[0031] As a preferred technical scheme of the embodiment, bolts 8 are rotatably installed on the two side plates 6, and the adjusting members 7 are threadedly connected with the bolts 8; by rotating the bolts, the adjusting members 7 can drive the two guide plates 9 to move, so as to adapt to insulators of different lengths.

[0032] As a preferred technical scheme of the embodiment, sliding members 17 are fixedly installed on the two metal conductive plates 14, one end of each sliding member 17 penetrates through the guide plate 9 and is fixedly installed with a magnetic block 16, and the two magnetic blocks 16 are oppositely arranged; by the electromagnetic driving assembly, the two magnetic blocks 16 are pushed, so as to realize extrusion of the two metal conductive plates 14 to the middle, thereby realizing extrusion and fixation of the insulator to the middle.

[0033] As a preferred technical scheme of the embodiment, the electromagnetic driving assembly comprises an iron core 18 fixedly installed between the two mounting plates 2, and a winding coil 19 is wound on the iron core 18, and the winding coil 19 and the two metal conductive plates 14 are connected in parallel through wires 12; by electrifying the winding coil 19, the iron core 18 can generate a magnetic force, according to the principle that similar poles attract and opposite poles repel, the magnetic blocks 16 connected to the metal conductive plates 14 can be pushed and extruded.

[0034] As a preferred technical scheme of the embodiment, two springs 15 are arranged between the two metal conductive plates 14 and the sliding groove 13; the arrangement of the springs 15 can realize resetting of the metal conductive plates 14 after the external force is removed, thereby facilitating detection of the next insulator.

[0035] As a preferred technical scheme of the embodiment, the positive electrode 1101 and the negative electrode 1102 of the test power supply 11 are connected in parallel with the two metal conductive plates 14 through wires 12, and the test power supply 11, the two metal conductive plates 14 and the winding coil 19 are connected in parallel; the test power supply 11 can supply power to the metal conductive plates 14 and the winding coil 19 at the same time, so as to realize simultaneous power-on test and clamping fixation.

[0036] As the preferred technical scheme of the embodiment, the side wall of one of the mounting plates 2 is fixedly provided with a voltage reducing rectifier 20, and the winding coil 19 is connected in series with the voltage reducing rectifier 20 through the lead wire 12; the voltage reducing rectifier 20 can reduce and rectify the alternating current during the voltage withstand test by the alternating current, so as to increase the appropriate voltage of the winding coil 19 and ensure the normal operation of the winding coil 19; when the test voltage is direct current, only the voltage reducing rectifier 20 needs to be replaced by a suitable resistance voltage reducing.

[0037] As the preferred technical scheme of the embodiment, the iron core 18 is arranged directly below the two magnetic blocks 16; the iron core 18 generates magnetism and can extrude the two magnetic blocks 16 above to the middle.

[0038] The above embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as the limitation of the patent scope of the application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A composite breakdown voltage testing structure for insulating materials, comprising a drive assembly and a test box (5) arranged at the top end of the drive assembly, characterized in that, The test box (5) is hingedly installed with a cabinet door (501), a detection device body (10) and a test power supply (11) are fixedly installed on the bottom plate (502) of the inner wall of the test box (5), the driving assembly comprises a conveying belt (4), two guide plates (9) are arranged above the conveying belt (4), an adjustable structure is arranged between the two guide plates (9) and the driving assembly, for adjusting the spacing of the two guide plates (9), a sliding groove (13) is formed in the inner wall of the guide plate (9), two metal conductive plates (14) are arranged at one end of the sliding groove (13) close to the test box (5), and an electromagnetic driving assembly is arranged between the two metal conductive plates (14) and the test power supply (11).

2. The composite breakdown voltage testing structure for insulating materials according to claim 1, wherein The driving assembly comprises a frame body (1), two mounting plates (2) are fixedly installed at the top end of the frame body (1), and electric conveying rollers (3) are arranged at the two ends of the two mounting plates (2).

3. The composite breakdown voltage testing structure for insulating materials according to claim 1, wherein The adjustable structure comprises side plates (6) fixedly installed at the top end of the two mounting plates (2), and adjusting pieces (7) are slidably installed on the two side plates (6), the adjusting pieces (7) are in the shape of a Chinese character 'fang', and the two parallel plate pieces of the adjusting pieces (7) are fixedly connected with the guide plates (9).

4. The composite breakdown voltage testing structure for insulating materials according to claim 3, wherein Bolts (8) are rotatably installed on the two side plates (6), and the adjusting pieces (7) are threadedly connected with the bolts (8).

5. The composite breakdown voltage testing structure for insulating materials according to claim 1, wherein Sliding pieces (17) are fixedly installed on the two metal conductive plates (14), one end of the sliding piece (17) penetrates through the guide plate (9) and is fixedly installed with a magnetic block (16), and the two magnetic blocks (16) are oppositely arranged.

6. The composite breakdown voltage testing structure for insulating materials according to claim 3, wherein The electromagnetic driving assembly comprises an iron core (18) fixedly installed between the two mounting plates (2), and a winding coil (19) is wound on the iron core (18), and the winding coil (19) and the two metal conductive plates (14) are connected in parallel through wires (12).

7. The composite breakdown voltage testing structure for insulating materials according to claim 1, wherein Two springs (15) are arranged between the two metal conductive plates (14) and the sliding groove (13).

8. The composite breakdown voltage testing structure for insulating materials according to claim 1, wherein The positive electrode (1101) and the negative electrode (1102) of the test power supply (11) are connected in parallel with the two metal conductive plates (14) through wires (12), and the test power supply (11), the two metal conductive plates (14) and the winding coil (19) are connected in parallel.

9. The composite breakdown voltage testing structure for insulating materials according to claim 6, wherein A voltage reducing rectifier (20) is fixedly installed on the side wall of one of the mounting plates (2), and the winding coil (19) is connected in series with the voltage reducing rectifier (20) through wires (12).

10. The composite breakdown voltage testing structure for insulating materials according to claim 6, wherein The iron core (18) is arranged directly below the two magnetic blocks (16).

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