A detection device for batch detection of electrical breakdown of insulators

Abstract

A detection device for batch detection of insulator electrical breakdown comprises a bracket and a cross bar arranged on the bracket, a plurality of hooks for hanging insulators to be detected are distributed along the cross bar, and each hook corresponds to a discharge indicator. The present invention arranges a discharge indicator under each insulator. During the test, the grounding wire of the discharge indicator is grounded. When a certain insulator is electrically broken down, the armature indication area of ​​the discharge indicator will be moved away from the discharge indication window. Then, by observing whether there is an armature indication area in the discharge indication window, it is judged whether the insulator is electrically broken down. This realizes batch rapid detection of whether the insulator is electrically broken down, and greatly improves the detection efficiency.

Description

Technical Field

[0001] The invention relates to insulator detection in the field of electrical equipment, in particular to a detection device for batch detection of electrical breakdown of insulators. Background Art

[0002] Electrical testing is the process of testing and verifying the insulation performance, electrical characteristics and mechanical properties of each electrical equipment in the electrical system in accordance with the relevant provisions of standards, regulations and specifications before the electrical system and electrical equipment are put into use, in order to determine whether there are any quality problems in their installation or manufacturing, and to determine whether the newly installed or operating electrical equipment can be put into normal operation.

[0003] In the power supply system, the number of insulators used for insulation and support is extremely large. In the electrical test of insulators, hundreds or even thousands of insulators need to be tested. Among them, the largest number of suspension insulators are required. According to relevant test procedures and standards, suspension insulators need to be suspended during the electrical breakdown test. This requires special brackets and testing instruments for the suspension insulator test. However, when testing suspension insulators, special testing organizations usually carry instruments and equipment to the insulator storage site for testing. There are generally no brackets suitable for hanging insulators and testing on site. The testing organization uses small vehicles to carry the test equipment to the site. It is difficult to carry general brackets. In addition, the existing testing instruments can only test single insulators, and the detection efficiency is very low. Summary of the invention

[0004] In order to solve the problem of low detection efficiency of existing detection equipment for electric breakdown experiments of suspension insulators, the present invention provides a detection device for batch detection of electric breakdown of insulators. After the detection device suspends multiple suspension insulators, a discharge indicator is installed under each suspension insulator. If electric breakdown occurs, the discharge indicator under the corresponding suspension insulator will be displayed, thereby achieving the purpose of quickly detecting a batch of insulators and greatly improving the detection efficiency. Moreover, the bracket of the detection device is also detachable and assembled, which is convenient for carrying and transportation, and can be quickly disassembled and assembled at the test site.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a detection device for batch detection of electrical breakdown of insulators, including a bracket and a cross bar arranged on the bracket, a plurality of hooks for hanging insulators to be detected are distributed along the cross bar, and also includes a plurality of discharge indicators, each discharge indicator includes a cylindrical shell and a magnetic electrode sheet located outside the cylindrical shell and adsorbed and connected to the insulator to be detected, a resistor, a rectifier bridge circuit, an electromagnet and an armature are arranged in the cylindrical shell, wherein one end of the resistor is provided with a connecting lead that passes through the cylindrical shell and is connected to the magnetic electrode sheet, and the other end is provided with a grounding wire that passes through the cylindrical shell The rectifier bridge circuit is connected in parallel with the resistor, and a capacitor is connected in parallel on the output end of the rectifier bridge circuit, and the capacitor is connected in parallel with the electromagnet; an upper magnet and a lower magnet are respectively arranged at both ends of the electromagnet, the upper end of the armature extends into the electromagnet and is adsorbed with the upper magnet, and an armature pull bolt extending from the cylindrical shell is arranged on the lower end side wall of the electromagnet where the armature extends out, and the armature is driven to move downward in the electromagnet through the armature pull bolt and the lower end of the armature is adsorbed with the lower magnet, an armature indication area is arranged at the lower part of the armature, and when the lower end of the armature is adsorbed with the lower magnet, the armature indication area is exposed in the discharge indication window arranged on the side wall of the cylindrical shell.

[0006] A preferred embodiment of the present invention is that the magnetic electrode sheet is located outside one end of the cylindrical shell, the resistor, rectifier bridge circuit and capacitor are located inside the cylindrical shell at one end close to the magnetic electrode sheet, the upper magnet is arranged adjacent to the capacitor, the lower magnet is arranged inside the end of the cylindrical shell away from the magnetic electrode sheet, and the electromagnet is arranged at a position close to the upper magnet.

[0007] Another preferred embodiment of the present invention is that the armature indicating area is an area formed after the armature side wall is painted with a bright color, and the size of the area matches the size of the discharge indicating window.

[0008] Another preferred embodiment of the present invention is that the bracket includes a left support rod, a middle support rod and a right support rod supported by a base, and the tops of the left support rod, the middle support rod and the right support rod all have a U-shaped groove opening upward, and the cross bar is arranged in the U-shaped groove at the tops of the left support rod, the middle support rod and the right support rod.

[0009] Another preferred embodiment of the present invention is that the crossbar is formed by splicing two rod-shaped pieces, and the splicing point is a mortise and tenon joint and is located in a U-shaped groove at the top of the middle support rod.

[0010] Another preferred embodiment of the present invention is that the base comprises a chassis, and a hollow tubular connecting column is provided at the center of the upper surface of the chassis for the bottoms of the left support rod, the middle support rod and the right support rod to be inserted therein.

[0011] Another preferred embodiment of the present invention is that a plurality of extended fins are evenly distributed around the edge of the chassis, each extended fin is provided with a triangular reinforcing rib plate, and the side edges of the reinforcing rib plate are fixedly connected to the side walls of the connecting column.

[0012] Another preferred embodiment of the present invention is that the hook includes a ring for the crossbar to pass through, a connecting rod is arranged on the ring, and a bowl head hanging plate or a right angle hanging plate connected to the insulator is arranged at the bottom end of the connecting rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) The present invention arranges a discharge indicator under each insulator. During the test, the grounding wire of the discharge indicator is grounded. When an insulator is electrically broken down, the armature indication area of ​​the discharge indicator will be moved away from the discharge indication window. Then, by observing whether there is an armature indication area in the discharge indication window, it is judged whether the insulator is electrically broken down. This realizes batch rapid detection of whether the insulator is electrically broken down, greatly improving the detection efficiency.

[0015] 2) The bracket of the present invention is composed of three parts: a left support rod, a middle support rod and a right support rod, and is easy to disassemble and assemble. The cross bar is made of rod-shaped pieces at both ends, which can increase the span, so as to place as many insulators as possible in one experiment, and take into account portability and reliability in hand; the hook is put on the cross bar with a ring, so it is easy to move on the cross bar to adapt to the experimental spacing requirements of insulators of different diameters and change the number of hooks as needed, and there are two different hanging plates (bowl head hanging plates or right-angle hanging plates) at the bottom, so as to adapt to insulators with ball head connection and groove connection respectively; the base and the support rod can be separated and disassembled, which reduces space waste during storage and improves portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 is a schematic diagram of the external structure of the discharge indicator;

[0018] Figure 3 is a schematic diagram of the internal structure of the discharge indicator;

[0019] Figure 4 It is a schematic diagram of the structure of the present invention when in use;

[0020] Figure 5 It is a schematic diagram of the connection between the left support rod and the base;

[0021] Figure 6 for Figure 5 Side view of

[0022] Figure 7 It is a schematic diagram of the mortise and tenon connection of the crossbar;

[0023] Figure 8 is a three-dimensional schematic diagram of the base;

[0024] Fig. 9 is a top view of the base;

[0025] Fig.10 It is a schematic diagram of the structure of two kinds of hooks;

[0026] Figure numerals: 1. left support rod, 101. U-shaped groove, 2. middle support rod, 3. right support rod, 4. hook, 401. ring, 402. bowl head hanging plate, 403. right angle hanging plate, 5. cross bar, 501. mortise and tenon, 6. base, 601. connecting column, 602. chassis, 603. reinforcing rib plate, 604. extension wing, 7. discharge indicator, 701. magnetic electrode sheet, 702. armature pull bolt, 703. discharge indication window, 704. resistor, 705. rectifier bridge circuit, 706. capacitor, 707. upper magnet, 708. electromagnet, 709. lower magnet, 710. armature, 711. armature indication area, 712. connecting lead, 713. ground wire. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further elaborated and illustrated in conjunction with specific embodiments below.

[0028] Example 1

[0029] like Figure 1-3As shown, a detection device for batch detection of electrical breakdown of insulators includes a bracket and a crossbar 5 arranged on the bracket, a plurality of hooks 4 for hanging insulators to be detected are distributed along the crossbar 5, each hook 4 corresponds to a discharge indicator 7, each discharge indicator 7 includes a cylindrical shell and a magnetic electrode sheet 701 located outside the cylindrical shell and adsorbed and connected to the insulator to be detected, a resistor 704, a rectifier bridge circuit 705, an electromagnet 708 and an armature 710 are arranged in the cylindrical shell, wherein one end of the resistor 704 is provided with a connecting lead 712 passing through the cylindrical shell and connected to the magnetic electrode sheet 701, and the other end is provided with a grounding wire 713 passing through the cylindrical shell, the rectifier bridge circuit 705 is connected in parallel with the resistor 704, and the rectifier bridge circuit 705 A capacitor 706 is connected in parallel to the output end, and the capacitor 706 is connected in parallel to the electromagnet 708; an upper magnet 707 and a lower magnet 709 are respectively provided at both ends of the electromagnet 708, the upper end of the armature 710 extends into the electromagnet 708 and is adsorbed by the upper magnet 707, and an armature pull bolt 702 extending out of the cylindrical shell is provided on the lower end side wall of the armature 710 extending out of the electromagnet 708, and the armature 710 is driven to move downward in the electromagnet 708 by the armature pull bolt 702, and the lower end of the armature 710 is adsorbed by the lower magnet 709, and an armature indication area 711 is provided at the lower part of the armature 710, and when the lower end of the armature 710 is adsorbed by the lower magnet 709, the armature indication area 711 is exposed in the discharge indication window 703 provided on the side wall of the cylindrical shell.

[0030] When performing the detection test in this embodiment, the steps are as follows:

[0031] 1) Place the bracket and crossbar 5, and place hooks 4 on the crossbar 5. Fix a suspension insulator to be tested under each hook 4. Adjust the spacing between the hooks 4 on the crossbar 5 to meet the test requirements;

[0032] 2) A discharge indicator 7 is fixed to the bottom of each suspension insulator through a magnetic electrode sheet 701, and the armature pull bolt 702 of each discharge indicator 7 is adjusted to make it adsorbed with the lower end magnet 709, so that the armature indication area 711 is exposed in the discharge indication window 703;

[0033] 3) Use a grounding wire to connect the grounding wires of all discharge indicators 7, and start the test after the grounding wire is grounded;

[0034] 4) After the test, check the discharge indicator 7 below each suspension insulator. If the armature indication area 711 cannot be observed in the discharge indication window 703, it means that the suspension insulator corresponding to the discharge indicator 7 has been broken down. Otherwise, it has not been broken down.

[0035] In this embodiment, the length of the crossbar 5 can be selected according to actual conditions, thereby determining the number of insulators to be tested in each batch.

[0036] In this embodiment, the so-called upper magnet 707 and lower magnet 709 refer to the magnet located at the upper position and the magnet located at the lower position when the discharge indicator 7 is adsorbed on the bottom of the suspension insulator through the magnetic electrode sheet 701 .

[0037] The above is a basic implementation of the present invention, and further improvements, optimizations and limitations can be made on the above basis to obtain the following embodiments:

[0038] Example 2

[0039] This embodiment is a limited solution based on the embodiment 1. Its main structure is the same as that of the embodiment 1, except that: Figure 3 As shown, the magnetic electrode sheet 701 is located outside one end of the cylindrical shell, the resistor 704, the rectifier bridge circuit 705 and the capacitor 706 are located inside the cylindrical shell at one end close to the magnetic electrode sheet 701, the upper magnet 707 is arranged adjacent to the capacitor 706, the lower magnet 709 is arranged inside the end of the cylindrical shell away from the magnetic electrode sheet 701, and the electromagnet 708 is arranged at a position close to the upper magnet 707.

[0040] Example 3

[0041] This embodiment is an improved solution based on the embodiment 1, and its main structure is the same as that of the embodiment 1, except that: Figure 3 As shown, the armature indication area 711 is an area formed after the side wall of the armature 710 is painted with a bright color, and the size of the area matches the size of the discharge indication window 703.

[0042] The armature indicating area 711 is painted in a bright color, that is, painted in an easily observable color such as green, red or yellow, so that the experimental results can be observed conveniently and intuitively.

[0043] Example 4

[0044] This embodiment is another improvement on the basis of the embodiment 1. Its main structure is the same as that of the embodiment 1, except that: Figure 1 , 5 As shown in 6, the bracket includes a left support rod 1, a middle support rod 2 and a right support rod 3 supported by a base 6, and the tops of the left support rod 1, the middle support rod 2 and the right support rod 3 all have a U-shaped groove 101 opening upward, and the cross bar 5 is mounted in the U-shaped groove 101 on the tops of the left support rod 1, the middle support rod 2 and the right support rod 3.

[0045] In order to reduce the weight of the entire device, the left support rod 1, the middle support rod 2, the right support rod 3 and the cross bar 5 are all hollow circular tubes.

[0046] Example 5

[0047] This embodiment is a limiting solution based on the embodiment 4. Its main structure is the same as that of the embodiment 4, except that: Figure 7 As shown, the cross bar 5 is formed by splicing two rod-shaped parts, and the splicing point is a mortise and tenon 501 and is located in the U-shaped groove 101 at the top of the middle support rod 2.

[0048] Of course, in addition to the mortise and tenon 501 connection, other detachable connection methods such as internal and external thread connection, or bolt connection can also be used.

[0049] Example 6

[0050] This embodiment is another limiting solution based on the embodiment 4. Its main structure is the same as that of the embodiment 4, except that: Figure 8 and 9 As shown, the base 6 includes a chassis 602, and a hollow tubular connecting column 601 is arranged at the center of the upper surface of the chassis 602 for the bottoms of the left support rod 1, the middle support rod 2 and the right support rod 3 to be inserted therein.

[0051] Example 7

[0052] This embodiment is a limiting solution based on the embodiment 6. Its main structure is the same as that of the embodiment 6. The difference is that: Figure 8 and 9 As shown, a number of extended fins 604 are evenly distributed around the edge of the chassis 602 , and a triangular reinforcing rib plate 603 is provided on each extended fin 604 , and the side edges of the reinforcing rib plate 603 are fixedly connected to the side walls of the connecting column 601 .

[0053] Example 8

[0054] This embodiment is another limiting solution based on the embodiment 1. Its main structure is the same as that of the embodiment 1, except that: Figure 3 As shown, the hook 4 includes a ring 401 for the crossbar 5 to pass through, a connecting rod is arranged on the ring 401, and a bowl head hanging plate 402 or a right angle hanging plate 403 connected to the insulator is arranged at the bottom end of the connecting rod.

[0055] In the above embodiments of the present invention, the base is preferably made of ABS, and the inner diameter of the connecting column 601 is 58 mm, the depth is 50 mm, and the outer diameter of the entire base 6 is 260 mm and the height is 6.8 mm;

[0056] The left support rod 1, the middle support rod 2 and the right support rod 3 are all made of fiberglass epoxy resin, with an outer diameter of 57mm, a wall thickness of 4mm, a height of 1500mm, and a top U-shaped groove 101 of 37mm width and 40mm depth; the cross bar 5 is made of fiberglass epoxy resin as a whole, with an outer diameter of 37mm and each is 1600mm long.

Claims

1. A detection device for batch detection of electrical breakdown of insulators, comprising a bracket and a crossbar (5) arranged on the bracket, and a plurality of hooks (4) for hanging insulators to be detected are distributed along the crossbar (5), characterized in that: The invention also comprises a plurality of discharge indicators (7), each of which comprises a cylindrical shell and a magnetic electrode sheet (701) located outside the cylindrical shell and adsorbed and connected to the insulator to be tested. A resistor (704), a rectifier bridge circuit (705), an electromagnet (708) and an armature (710) are arranged in the cylindrical shell, wherein one end of the resistor (704) is provided with a connecting lead (712) passing through the cylindrical shell and connected to the magnetic electrode sheet (701), and the other end is provided with a grounding wire (713) passing through the cylindrical shell. The rectifier bridge circuit (705) is connected in parallel with the resistor (704), and a capacitor (706) is connected in parallel to the output end of the rectifier bridge circuit (705). The capacitor (706) is connected in parallel with the electromagnet (708); An upper magnet (707) and a lower magnet (709) are respectively arranged at two ends of the electromagnet (708); the upper end of the armature (710) extends into the electromagnet (708) and is attracted by the upper magnet (707); an armature pull bolt (702) extending out of the cylindrical shell is arranged on the side wall of the lower end of the armature (710) extending out of the electromagnet (708); the armature (710) is driven to move downward in the electromagnet (708) by the armature pull bolt (702) so that the lower end of the armature (710) is attracted by the lower magnet (709); an armature indication area (711) is arranged at the lower part of the armature (710); and when the lower end of the armature (710) is attracted by the lower magnet (709), the armature indication area (711) is exposed in a discharge indication window (703) arranged on the side wall of the cylindrical shell.

2. A detection device for batch detection of electrical breakdown of insulators according to claim 1, characterized in that: The magnetic electrode sheet (701) is located outside one end of the cylindrical shell, the resistor (704), the rectifier bridge circuit (705) and the capacitor (706) are located inside the cylindrical shell at one end close to the magnetic electrode sheet (701), the upper magnet (707) is arranged adjacent to the capacitor (706), the lower magnet (709) is arranged inside one end of the cylindrical shell away from the magnetic electrode sheet (701), and the electromagnet (708) is arranged at a position close to the upper magnet (707).

3. A detection device for batch detection of electrical breakdown of insulators according to claim 1, characterized in that: The armature indication area (711) is an area formed after the side wall of the armature (710) is painted with a bright color, and the size of the area matches the size of the discharge indication window (703).

4. A detection device for batch detection of electrical breakdown of insulators according to claim 1, characterized in that: The bracket comprises a left support rod (1), a middle support rod (2) and a right support rod (3) supported by a base (6), and the tops of the left support rod (1), the middle support rod (2) and the right support rod (3) are all provided with U-shaped grooves (101) opening upward, and the cross bar (5) is mounted in the U-shaped grooves (101) at the tops of the left support rod (1), the middle support rod (2) and the right support rod (3).

5. A detection device for batch detection of electrical breakdown of insulators according to claim 4, characterized in that: The cross bar (5) is formed by splicing two rod-shaped parts, the joint is a mortise and tenon (501) and is located in a U-shaped groove (101) at the top of the middle support bar (2).

6. A detection device for batch detection of electrical breakdown of insulators according to claim 4, characterized in that: The base (6) comprises a bottom plate (602), and a hollow tubular connecting column (601) is arranged at the center of the upper surface of the bottom plate (602) for the bottoms of the left supporting rod (1), the middle supporting rod (2) and the right supporting rod (3) to be inserted therein.

7. A detection device for batch detection of electrical breakdown of insulators according to claim 6, characterized in that: A plurality of extended fins (604) are evenly distributed around the edge of the bottom plate (602), each extended fin (604) is provided with a triangular reinforcing rib plate (603), and the side edges of the reinforcing rib plate (603) are fixedly connected to the side walls of the connecting column (601).

8. The detection device for batch detection of electrical breakdown of insulators according to claim 1, characterized in that: The hook (4) comprises a circular ring (401) through which the crossbar (5) passes, a connecting rod is arranged on the circular ring (401), and a bowl head hanging plate (402) or a right angle hanging plate (403) connected to the insulator is arranged at the bottom end of the connecting rod.

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