Equipment for testing high-voltage lightning arrester

Abstract

The embodiment of the utility model provides equipment for testing a high-voltage lightning arrester, and relates to the technical field of lightning arrester detection. The equipment for testing the high-voltage lightning arrester comprises a detector, the detector is connected with a gripper mechanism through a cable, the gripper mechanism is fixed at the end part of the lightning arrester, and an insulation protection mechanism is sleeved at the detection end of the lightning arrester. By rotating the gear ring and meshing the gear ring with the double-layer gear, the double-layer gear rotates, so that the double-layer gear is meshed with the rack, the rack drives the protective cover plate to move, a high-voltage electric field can be effectively isolated after a detection part of the lightning arrester is wrapped, and an electrified part is prevented from being accidentally touched or approached during a high-voltage test; and the protective cover plate is stably fixed on the lightning arrester after being fixed through the positioning rod, so that an insulation cap is prevented from being hit by too large electric quantity, or the danger caused by separation from the test due to poor fixation is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of arrester detection, in particular to a device for testing high-voltage arresters. Background Art

[0002] As an important protection device in the power system, the arrester is used to limit lightning overvoltage and switching overvoltage, protect electrical equipment from damage. Regular detection can timely discover potential faults of the arrester, prevent power system faults caused by the failure of the arrester, and ensure the safe and stable operation of the power grid.

[0003] The arrester is mainly installed in the substation. When conducting the leakage current test of the arrester, a high voltage needs to be applied to it, and usually clips are clamped on the arrester during the test. The clips are exposed outside. When a high-voltage DC transmission line conducts a power transmission test on it, if other surrounding equipment is relatively close, it will discharge and generate leakage current, threatening the personal safety of operators. Moreover, the clamping force of the clips is relatively light, and if the power is too large, the clips are likely to be knocked off. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for testing high-voltage arresters, which can avoid the situation that when a high-voltage DC transmission line conducts a power transmission test on it, if other surrounding equipment is relatively close, it will discharge and generate leakage current, threatening the personal safety of operators.

[0005] The utility model provides a device for testing high-voltage arresters, including a detector, the detector is connected to a gripper mechanism through a cable, the gripper mechanism is fixed at the end of the arrester, and at the same time, an insulating protection mechanism is sleeved on the detection end of the arrester. The gripper mechanism is installed inside the insulating protection mechanism. When the insulating protection mechanism wraps and protects the end of the arrester, the gripper mechanism is fixed at the end of the arrester for detection. The insulating protection mechanism includes a top plate at the top, an outer limiting ring is arranged on the upper side of the top plate, four annularly distributed limiting grooves II are opened on the outer limiting ring, a rack is slidably arranged in each of the four limiting grooves II, one end of each rack is connected with a protective cover plate, the four protective cover plates are located outside the arrester, an inner limiting ring is arranged on the top plate inside the outer limiting ring, four limiting grooves I are opened on the inner limiting ring, the rack is slidably connected with the limiting groove I, an annular groove is opened in the outer limiting ring, a gear ring is rotatably arranged in the annular groove, four double-layer gears are rotatably arranged on the top plate inside the gear ring, the upper and lower ends of the double-layer gears are respectively meshed with the rack and the gear ring, the gripper mechanism includes an end plate connected to the top plate, at least three clamping rods are hinged to the lower side of the end plate, a lead screw is rotatably connected to the center of the end plate, the lower end of the lead screw is threadedly connected with a center plate, and the center plate is movably connected with the clamping rod through a connecting rod.

[0006] Preferably, a third limiting groove is provided on one side of each of the first limiting groove and the second limiting groove, and one side of the rack slides in the third limiting groove.

[0007] Preferably, a plurality of positioning holes are provided on one side of the rack, and the rack is fixed by inserting a positioning rod through the positioning holes and engaging with the top plate.

[0008] Preferably, the size of the lower side of the protective cover plate is smaller than that of the upper side.

[0009] Preferably, a positioning ring is provided on the lower side of the protective cover plate.

[0010] Preferably, a recess is provided on the inner side of the lower end of the clamping rod.

[0011] Compared with the prior art, an apparatus for testing a high-voltage lightning arrester provided by an embodiment of the present invention is as follows:

[0012] 1. By rotating the gear ring, through the meshing of the gear ring and the double-layer gear, the double-layer gear rotates, thereby promoting the meshing of the double-layer gear and the rack. The rack drives the protective cover plate to move, and according to the size of the lightning arrester, the size of the protective cover plate wrapping the end of the lightning arrester is adjusted, so that the insulation protection mechanism can meet the sizes of lightning arresters of different sizes. After wrapping the detection part of the lightning arrester, it can effectively isolate the high-voltage electric field, prevent accidental contact or approach to the live part during high-voltage testing, thereby protecting the personal safety of the operator. At the same time, it avoids accidental contact of the test wire, tool or surrounding metal parts with the live part of the lightning arrester, thereby preventing the occurrence of short-circuit or grounding accidents. After being fixed by the positioning rod, the protective cover plate is stably fixed on the lightning arrester, preventing the insulation cap from being blown off due to excessive electricity or causing danger due to poor fixation and detachment from the test.

[0013] 2. By rotating the lead screw, the central plate descends, and further promotes the connecting rod to drive the clamping rod to grasp and fix the end of the lightning arrester, further improving the safety of the device during detection, and at the same time mutually assisting with the insulation protection mechanism to improve the stability of both during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0016] Figure 2 Schematic cross-sectional view of the overall insulation protection mechanism structure of the embodiment of the present utility model;

[0017] Figure 3 Schematic diagram of the insulation mechanism structure of the embodiment of the present utility model;

[0018] Figure 4 Schematic diagram of the protective cover plate structure of the embodiment of the present utility model;

[0019] Figure 5 Schematic diagram of structures such as the gear ring of the embodiment of the present utility model;

[0020] Figure 6 For the embodiment of the present utility model Figure 5 Schematic diagram of the structure at position A;

[0021] Figure 7 Schematic diagram of the gripper mechanism structure of the embodiment of the present utility model;

[0022] Figure 8 For the embodiment of the present utility model Figure 7 Schematic diagram of the structure at position B.

[0023] Reference numerals:

[0024] 1, detector; 2, cable; 3, top plate; 4, inner limit ring; 5, outer limit ring; 6, first limit groove; 7, second limit groove; 8, gear ring; 9, double-layer gear; 10, third limit groove; 11, positioning rod; 12, rack; 13, positioning hole; 14, protective cover plate; 15, positioning ring; 16, end plate; 17, lead screw; 18, center plate; 19, clamping rod; 20, connecting rod; 21, depression; 22, annular groove. Detailed implementation manners

[0025] The following will describe in detail some implementation manners of the present utility model with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0026] Please refer to Figures 1-8 , the embodiment of the present utility model provides a device for testing a high-voltage lightning arrester, including a detector 1. The detector 1 is connected to a gripper mechanism through a cable 2. The gripper mechanism is fixed to the end of the lightning arrester, and the end of the lightning arrester is fixed by the gripper mechanism to improve the stability during detection.

[0027] Among them, the gripper mechanism includes an end plate 16 connected to the top plate 3. At least three clamping rods 19 are hinged to the lower side of the end plate 16. The clamping rods 19 are bent, and a recess 21 is provided on the inner side of the lower end of the clamping rod 19. The recess 21 is adapted to the shape of the end of the lightning arrester, facilitating clamping. A lead screw 17 is rotatably connected to the center of the end plate 16. The lower end of the lead screw 17 is threadedly connected to a center plate 18. The center plate 18 is movably connected to the clamping rod 19 through a connecting rod 20. The whole device is placed at the end of the lightning arrester, so that the end of the lightning arrester is located inside the three open clamping rods 19. The lead screw 17 is rotated, the center plate 18 moves downward, and the connecting rod 20 is pulled. The connecting rod 20 drives the clamping rod 19 to close and clamp and fix the end of the lightning arrester, which is not only convenient to operate but also has high stability.

[0028] At the same time, an insulating protection mechanism is sleeved on the detection end of the lightning arrester. The gripper mechanism is installed inside the insulating protection mechanism. When the insulating protection mechanism wraps and protects the end of the lightning arrester, the gripper mechanism is fixed at the end of the lightning arrester for detection.

[0029] As Figure 3 shown, the insulating protection mechanism includes a top plate 3 at the top. An outer limiting ring 5 is provided on the upper side of the top plate 3. Four annularly distributed limiting grooves two 7 are opened on the outer limiting ring 5. A rack 12 is slidably arranged in each of the four limiting grooves two 7. One end of each rack 12 is connected to a protective cover plate 14. The protective cover plate 14 is in an arc-shaped structure. The four protective cover plates 14 form an annular protective insulation structure, and the four protective cover plates 14 are located outside the lightning arrester. When the rack 12 drives the protective cover plate 14 to slide, the position of the protective cover plate 14 can be changed, facilitating the position adjustment of the protective cover plate 14 according to the size of the lightning arrester, so that the protective cover plate 14 can perform insulation protection on lightning arresters of different sizes.

[0030] In addition, an inner limiting ring 4 is provided on the top plate 3 inside the outer limiting ring 5. Four limiting grooves one 6 are opened on the inner limiting ring 4. The rack 12 is slidably connected to the limiting groove one 6. The restriction on the rack 12 is strengthened through the inner limiting ring 4, making the rack 12 move more stably.

[0031] Further, a limiting groove three 10 is opened on one side of each of the limiting groove one 6 and the limiting groove two 7. One side of the rack 12 slides in the limiting groove three 10, making the rack 12 move more stably when moving.

[0032] Furthermore, an annular groove 22 is opened inside the outer limiting ring 5. A gear ring 8 is rotatably arranged in the annular groove 22. Four double-layer gears 9 are rotatably arranged on the top plate 3 inside the gear ring 8. The upper and lower ends of the double-layer gears 9 are respectively engaged with the rack 12 and the gear ring 8. Therefore, when the gear ring 8 rotates, the four double-layer gears 9 rotate, and then the four racks 12 move, realizing the simultaneous movement of the four protective cover plates 14 and improving the installation efficiency of the insulation protection mechanism.

[0033] It should be noted that a plurality of positioning holes 13 are provided on one side of the rack 12. When the rack 12 stops moving, the rack 12 is fixed by the plug-in cooperation of the positioning rod 11 passing through the positioning holes 13 and the top plate 3, preventing the rack 12 from sliding back, and then fixing the insulation protection mechanism on the lightning arrester.

[0034] Among them, the size of the lower side of the protective cover plate 14 is smaller than that of the upper side, which can enhance the fixing effect of the protective cover plate 14. At the same time, a positioning ring 15 is provided on the lower side of the protective cover plate 14, and the positioning ring 15 fits with the lightning arrester to fix the lightning arrester.

[0035] The protective cover plate 14 can be made of insulating materials such as polyvinyl chloride and epoxy resin, which have the performance of aging resistance and low cost.

[0036] In summary, the working principle of a device for testing high-voltage lightning arresters in an embodiment of the present invention is as follows: Place the device at the end of the lightning arrester, rotate the lead screw 17 to lower the center plate 18, and then prompt the connecting rod 20 to drive the clamping rod 19 to grab and fix the end of the lightning arrester. Rotate the gear ring 8. Through the meshing of the gear ring 8 and the double-layer gear 9, the double-layer gear 9 rotates. The double-layer gear 9 meshes with the rack 12, and the rack 12 drives the protective cover plate 14 to move, and adjusts the size of the wrapping of the protective cover plate 14 around the end of the lightning arrester according to the size of the lightning arrester.

[0037] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An apparatus for testing a high-voltage lightning arrester, comprising a detector (1), characterized in that: The detector (1) is connected to the gripper mechanism through a cable (2). The gripper mechanism is fixed at the end of the lightning arrester. At the same time, an insulation protection mechanism is sleeved on the detection end of the lightning arrester. The gripper mechanism is installed inside the insulation protection mechanism. When the insulation protection mechanism wraps and protects the end of the lightning arrester, the gripper mechanism is fixed at the end of the lightning arrester for detection. The insulation protection mechanism includes a top plate (3) at the top. An outer limit ring (5) is arranged on the upper side of the top plate (3). Four annularly distributed limit grooves II (7) are opened on the outer limit ring (5). Rack bars (12) are slidably arranged in the four limit grooves II (7). One end of each rack bar (12) is connected to a protective cover plate (14). The four protective cover plates (14) are located outside the lightning arrester. An inner limit ring (4) is arranged on the top plate (3) inside the outer limit ring (5). Four limit grooves I (6) are opened on the inner limit ring (4). The rack bars (12) are slidably connected to the limit grooves I (6). An annular groove (22) is opened inside the outer limit ring (5). A gear ring (8) is rotatably arranged in the annular groove (22). Four double-layer gears (9) are rotatably arranged on the top plate (3) inside the gear ring (8). The upper and lower ends of the double-layer gears (9) are meshed with the rack bars (12) and the gear ring (8) respectively. The gripper mechanism includes an end plate (16) connected to the top plate (3). At least three clamping rods (19) are hinged to the lower side of the end plate (16). A lead screw (17) is rotatably connected to the center of the end plate (16). The lower end of the lead screw (17) is threadedly connected to a center plate (18). The center plate (18) is movably connected to the clamping rods (19) through a connecting rod (20).

2. The device for testing a high-voltage lightning arrester according to claim 1, characterized in that: A limit groove III (10) is opened on one side of each of the limit grooves I (6) and the limit grooves II (7). One side of the rack bar (12) slides in the limit groove III (10).

3. The device for testing a high-voltage lightning arrester according to claim 2, characterized in that: A plurality of positioning holes (13) are opened on one side of the rack bar (12). The rack bar (12) is fixed by the insertion fit of a positioning rod (11) passing through the positioning holes (13) and the top plate (3).

4. The device for testing a high-voltage lightning arrester according to claim 3, characterized in that: The size of the lower side of the protective cover plate (14) is smaller than that of the upper side.

5. The device for testing a high-voltage lightning arrester according to claim 1, characterized in that: A positioning ring (15) is arranged on the lower side of the protective cover plate (14).

6. The device for testing a high-voltage lightning arrester according to claim 1, characterized in that: A recess (21) is arranged on the inner side of the lower end of the clamping rod (19).

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