Lightning arrester with disconnector

Abstract

The utility model discloses a lightning arrester with a disconnector, which comprises an insulator, an upper conductive plate fixed at one end of the insulator, a lower conductive plate fixed at the other end of the insulator, and a lightning arrester, one end of the lightning arrester is hinged to the lower conductive plate, the other end of the lightning arrester is abutted against the upper conductive plate, the insulator is provided with a hoop, and the insulator is provided with a disconnector. Rotatable extension plates are arranged on the two sides of the hoop, and telescopic limiting plates are arranged on the extension plates and are arranged on the rotating track of the lightning arrester. The limiting plate is located on the falling track of the lightning arrester through the extension plate, and the contact area of the limiting plate and the limiting plate is increased, so that the buffering function of the outer pad is effectively exerted, the impact force generated by collision is reduced, the falling rotation angle of the lightning arrester is adjusted through the limiting plate according to different installation spaces, and the lightning arrester is prevented from falling off. Therefore, the defect that the lightning arrester hot-melt disconnector cannot be used due to insufficient space is overcome, and the product has the advantages of good applicability and adjustability.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arresters, in particular to a lightning arrester with a disconnector. Background Art

[0002] A lightning arrester is an electrical appliance used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, and to limit the follow-on time, and often also to limit the follow-on value. A lightning arrester is sometimes also called an overvoltage protector or overvoltage limiter. A disconnector is a supporting product of a lightning arrester and is used in series with the lightning arrester. When the lightning arrester fails or is damaged, it can operate to disconnect and isolate the damaged lightning arrester from the system in time and give clear markings, thereby ensuring the normal operation of the system, facilitating the location of the fault point, and the inspection and replacement of the lightning arrester.

[0003] Disconnectors can be used in a variety of ways, including thermal melt disconnectors and thermal explosion disconnectors. Thermal melt disconnectors use the short-circuit current flowing through the failed arrester to melt the alloy fuse (or solder) in the disconnector to achieve the purpose of disconnection. Thermal explosion disconnectors use the short-circuit current in the failed arrester to generate an arc in the disconnector and detonate the thermal explosion element to achieve the purpose of disconnection. These different working principles and technical requirements together ensure the effectiveness and safety of disconnectors in power systems.

[0004] The main structure of the existing lightning arrester with a thermal melt disconnector includes one end of the lightning arrester hinged to the insulator and the other end resting on the insulator. When the overcurrent fuses the alloy fuse in the disconnector, the lightning arrester loses its supporting force against the insulator, causing the lightning arrester to rotate around the hinge point. After the rotation, the overall volume of the lightning arrester increases. When the upper and lower spaces are insufficient to fully unfold the disconnected lightning arrester, the lightning arrester with a thermal melt disconnector cannot be used. Therefore, the applicant has made a beneficial design and found a solution to the above-mentioned problem. The technical solution to be introduced below is produced in this context. Summary of the invention

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional lightning arrester with hot-melt disconnector design and provide a product with good applicability and adjustability.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A lightning arrester with a disconnector comprises an insulator, an upper conductive plate fixed at one end of the insulator, a lower conductive plate fixed at the other end of the insulator, and a lightning arrester, wherein one end of the lightning arrester is hinged to the lower conductive plate, and the other end abuts against the upper conductive plate. The insulator is provided with a clamp, and rotatable extension plates are provided on both sides of the clamp. The extension plate is provided with a retractable limit plate and is arranged on the rotation trajectory of the lightning arrester. The outer wall of the limit plate is provided with an outer pad with a buffering function, and the extension plate and the limit plate are provided with fasteners for fixing the extension plate and the limit plate in the adjusted position.

[0008] Preferably, the lower conductive plate is provided with a support frame, and grooves with openings are provided on both sides of the support frame.

[0009] Preferably, a disconnector and a holding ring are provided at the lower end of the arrester, and round shafts are provided on both sides of the holding ring and are pivotally arranged in the groove. The disconnector is electrically connected to the lower conductive plate through a flexible connecting wire, and a moving contact is provided at the upper end of the arrester.

[0010] Preferably, the upper conductive plate is provided with a pressure plate, the pressure plate is provided with a cavity that can accommodate the moving contact, a spring is provided between the back of the cavity and the upper conductive plate and acts on the moving contact, and the upper conductive plate is provided with a guide bracket and is arranged on both sides of the moving contact.

[0011] Preferably, support plates are provided on both sides of the clamp, and a hinged through hole is provided on one side of the support plate.

[0012] Preferably, the extension plate is provided with a slot giving way to the support plate, the slot is provided with a first through hole corresponding to the hinged through hole, a nut is provided on one side of the first through hole, avoidance grooves are provided on both sides of the extension plate, a cross plate is provided between the extension plates, and the extension plate is provided with a limiting through hole.

[0013] Preferably, the limiting plate is provided with a cylinder corresponding to the limiting through hole, and the cylinder is provided with a threaded hole.

[0014] Preferably, the fastener is provided with a handle portion, the fastener passes through the first through hole, the hinge through hole, and is threadedly connected to the nut, and the fastener is also threadedly connected to the threaded hole.

[0015] Preferably, the fastener is configured as a fastening screw, and the outer pad is configured as a shock-absorbing rubber pad.

[0016] Beneficial effects:

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model makes the limit plate on the falling trajectory of the lightning arrester by extending the plate and increases the contact area between the limit plate and the arrester, thereby effectively exerting the buffering function of the outer pad and reducing the impact force generated by the collision. According to different installation spaces, the rotation angle of the falling lightning arrester is adjusted by the limit plate, thereby improving the defect that the lightning arrester hot-melt disconnector cannot be used due to insufficient space, and the product has the advantages of good applicability and adjustability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a lightning arrester with a disconnector according to the utility model;

[0020] Figure 2 This is a front view of a lightning arrester with a disconnector according to the utility model when it is disconnected;

[0021] Figure 3 This is an exploded diagram of a lightning arrester with a disconnector according to the utility model;

[0022] Figure 4 This is a structural schematic diagram of a lightning arrester with a disconnector according to the utility model;

[0023] Figure 5 For this utility model Figure 3 A partial structure enlarged view of detail A of a lightning arrester with a disconnector;

[0024] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0025] Reference numerals: 1, insulator; 2, upper conductive plate; 3, lower conductive plate; 4, lightning arrester; 5, clamp; 6, fastener; 7, disconnector;

[0026] 21. Pressing plate; 22. Concave cavity; 23. Spring; 24. Guide bracket;

[0027] 31. Support frame; 32. Groove;

[0028] 41. holding ring; 42. round shaft; 43. moving contact;

[0029] 51. Extension plate; 52. Limiting plate; 53. Outer pad; 54. Support plate; 55. Horizontal plate;

[0030] 511, slot; 512, first through hole; 513, nut; 514, avoidance groove; 515, limit through hole;

[0031] 521, cylinder; 522, threaded hole;

[0032] 541, hinged through hole;

[0033] 61. Handle part;

[0034] 71. Soft connecting wire. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] Reference example Figures 1 to 5 , a lightning arrester with a disconnector, comprising an insulator 1, an upper conductive plate 2 fixed at one end of the insulator 1, a lower conductive plate 3 fixed at the other end of the insulator 1, and a lightning arrester 4, one end of the lightning arrester 4 is hinged to the lower conductive plate 3, and the other end abuts against the upper conductive plate 2, the insulator 1 is provided with a clamp 5, both sides of the clamp 5 are provided with a rotatable extension plate 51, the extension plate 51 is provided with a retractable limit plate 52, and is arranged on the rotation track of the lightning arrester 4, the outer wall of the limit plate 52 is provided with an outer pad 53 with a buffer function, the extension plate 51 and the limit plate 52 are provided with a fastener 6 for fixing the extension plate 51 and the limit plate 52 at the adjusted position;

[0039] It is worth mentioning that the lower conductive plate 3 is provided with a support frame 31, and grooves 32 with openings are provided on both sides of the support frame 31. The support frame 31 provides support for the lightning arrester 4, and the open grooves 32 facilitate the round shaft 42 to enter therein;

[0040] It is worth mentioning that the lower end of the arrester 4 is provided with a disconnector 7 and a ring 41. Round shafts 42 are provided on both sides of the ring 41 and are pivotally arranged in the groove 32. The disconnector 7 is electrically connected to the lower conductive plate 3 through a soft connecting line 71. A moving contact 43 is provided at the upper end of the arrester 4. The moving contact 43 can be separated from the concave cavity 22 through the disconnector 7. The soft connecting line 71 facilitates the disconnector 7 to fall off, thereby playing a warning role. The moving contact 43 plays a conductive role.

[0041] It is worth mentioning that the upper conductive plate 2 is provided with a pressing plate 21, and the pressing plate 21 is provided with a concave cavity 22 that can accommodate the moving contact 43. A spring 23 is provided between the back of the concave cavity 22 and the upper conductive plate 2, and acts on the moving contact 43. The upper conductive plate 2 is provided with a guide bracket 24, and is arranged on both sides of the moving contact 43. The spring 23 applies force to the pressing plate 21, so that a support point is formed between the lightning arrester 4 and the groove 32. The concave cavity 22 increases the contact area with the moving contact 43 and plays a role in preventing the moving contact 43 from detaching from the concave cavity 22. The guide bracket 24 guides the moving contact 43 into the pressing plate 21 and the concave cavity 22;

[0042] It is worth mentioning that support plates 54 are provided on both sides of the hoop 5, and a hinged through hole 541 is provided on one side of the support plate 54. The support plate 54 provides support for the extension plate 51, and the hinged through hole 541 is used in conjunction with the first through hole 512;

[0043] It is worth mentioning that the extension plate 51 is provided with a slot 511 that gives way to the support plate 54, the slot 511 is provided with a first through hole 512, and corresponds to the hinge through hole 541, a nut 513 is provided on one side of the first through hole 512, and avoidance grooves 51432 are provided on both sides of the extension plate 51, a cross plate 55 is provided between the extension plates 51, and the extension plate 51 is provided with a limiting through hole 515, the slot 511 allows the support plate 54 to rotate therein, the first through hole 512 cooperates with the fastener 6 to pass through, so that the first through hole 512 rotates around the hinge through hole 541, and the nut 513 can be directly welded and fixed to the first through hole 512, so that the fastener 6 only needs to be rotated to fix the extension plate 51 at the adjusted position, and the extension plates 51 located on both sides of the hoop 5 are synchronously adjusted through the cross plate 55, which increases the convenience of adjustment;

[0044] It is worth mentioning that the limiting plate 52 is provided with a cylinder 521 corresponding to the limiting through hole 515, and the cylinder 521 is provided with a threaded hole 522. The movable range of the cylinder 521 is limited by the limiting through hole 515, thereby limiting the telescopic range of the limiting plate 52. The threaded hole 522 is used in conjunction with the fastener 6. The shape of the limiting plate 52 can be set to U-shape, L-shape, ring-shaped, etc.

[0045] It is worth mentioning that the fastener 6 is provided with a handle portion 61, the fastener 6 passes through the first through hole 512, the hinge through hole 541, and is threadedly connected to the nut 513, and the fastener 6 is also threadedly connected to the threaded hole 522, and the handle portion 61 is convenient for the user to rotate the fastener 6;

[0046] It is worth mentioning that the fastener 6 is configured as a fastening screw and the outer pad 53 is configured as a shock-absorbing rubber pad.

[0047] The use principle of the utility model is now described as follows:

[0048] When it is necessary to adjust the falling angle of the arrester 4, the angle between the extension plate 51 and the support plate 54 is adjusted by loosening the fastener 6 at the first through hole 512, and then the degree of fit between the limit plate 52 and the outer wall of the arrester 4 when rotating and falling is adjusted, thereby increasing the contact area, thereby exerting the buffering and shock absorbing function of the outer pad 53, and at the same time, avoiding the limit plate 52 from contacting the skirt of the outer wall of the arrester 4, so that the limit plate 52 is between the skirts. After the adjustment of the limit plate 52 is completed, the fastener 6 at the first through hole 512 is tightened and engaged with the nut 513, so that the support plate 54 is tightly connected to the extension plate 51, so that the extension plate 51 is fixed in the adjusted position;

[0049] Loosen the fastener 6 at the threaded hole 522, pull the limit plate 52 outward or push the limit plate 52 inward, so as to adjust the distance between the limit plate 52 and the lightning arrester 4, thereby limiting the rotation and falling angle of the lightning arrester 4, and reducing the overall volume of the product after the lightning arrester 4 is separated from the upper conductive plate 2, thereby improving the defect that there is insufficient space to use the hot-melt detacher 7 of the lightning arrester 4.

[0050] The above design scheme can make the product have the advantages of good applicability and adjustability.

[0051] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A lightning arrester with a disconnector, comprising an insulator (1), an upper conductive plate (2) fixed to one end of the insulator (1), a lower conductive plate (3) fixed to the other end of the insulator (1), and a lightning arrester (4), wherein one end of the lightning arrester (4) is hinged to the lower conductive plate (3) and the other end abuts against the upper conductive plate (2), characterized in that: The insulator (1) is provided with a clamp (5), and rotatable extension plates (51) are provided on both sides of the clamp (5), and the extension plates (51) are provided with retractable limit plates (52) and are arranged on the rotation track of the arrester (4), and the outer wall of the limit plate (52) is provided with an outer pad (53) with a buffering function, and the extension plate (51) and the limit plate (52) are provided with fasteners (6) for fixing the extension plate (51) and the limit plate (52) at adjusted positions.

2. The arrester with disconnector according to claim 1, characterized in that: The lower conductive plate (3) is provided with a supporting frame (31), and grooves (32) with openings are provided on both sides of the supporting frame (31).

3. The arrester with disconnector according to claim 2, characterized in that: The lower end of the lightning arrester (4) is provided with a disconnector (7) and a ring (41); round shafts (42) are provided on both sides of the ring (41) and are pivotally arranged in the groove (32); the disconnector (7) is electrically connected to the lower conductive plate (3) via a flexible connecting line (71); and a moving contact (43) is provided at the upper end of the lightning arrester (4).

4. The arrester with disconnector according to claim 3, characterized in that: The upper conductive plate (2) is provided with a pressure plate (21), the pressure plate (21) is provided with a cavity (22) capable of accommodating a moving contact (43), a spring (23) is provided between the back side of the cavity (22) and the upper conductive plate (2) and acts on the moving contact (43), and the upper conductive plate (2) is provided with a guide bracket (24) and is arranged on both sides of the moving contact (43).

5. The arrester with disconnector according to claim 1, characterized in that: Support plates (54) are provided on both sides of the clamp (5), and a hinged through hole (541) is provided on one side of the support plate (54).

6. The arrester with disconnector according to claim 5, characterized in that: The extension plate (51) is provided with a slot (511) for giving way to the support plate (54); the slot (511) is provided with a first through hole (512) corresponding to the hinge through hole (541); a nut (513) is provided on one side of the first through hole (512); avoidance grooves (514) (32) are provided on both sides of the extension plate (51); a transverse plate (55) is provided between the extension plates (51); and the extension plate (51) is provided with a limiting through hole (515).

7. The arrester with disconnector according to claim 6, characterized in that: The limiting plate (52) is provided with a cylinder (521) corresponding to the limiting through hole (515), and the cylinder (521) is provided with a threaded hole (522).

8. The arrester with disconnector according to claim 7, characterized in that: The fastener (6) is provided with a handle portion (61), passes through the first through hole (512), the hinge through hole (541), and is threadedly connected to the nut (513), and the fastener (6) is also threadedly connected to the threaded hole (522).

9. The arrester with disconnector according to claim 8, characterized in that: The fastener (6) is configured as a fastening screw, and the outer pad (53) is configured as a shock-absorbing rubber pad.

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