Lightning arrester

Abstract

The utility model discloses a lightning arrester, which comprises a core shaft, an insulating shell sleeved on the periphery of the core shaft, and a connector and a base connected with the core shaft, the core shaft comprises an upper end cap and a lower end cap, and an upper sealing fixing assembly which is detachably and hermetically mounted is arranged between the upper end cap and the upper end of the insulating shell. The connector is fixed to the upper end cap through an upper sealing and fixing assembly, a lower sealing and fixing assembly which is detachably installed in a sealing mode is arranged between the lower end cap and the lower end of the insulating shell, and the base is fixed to the lower end cap through the lower sealing and fixing assembly. The utility model has the following advantages and effects: the core shaft can be recycled, so that the waste of resources is reduced, and the core shaft is green and environment-friendly.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electrical equipment, in particular to a lightning arrester. BACKGROUND

[0002] Lightning arrester is mainly used for protecting electrical equipment from high transient overvoltage damage when lightning, and can quickly act when overvoltage occurs, and release overvoltage energy to the ground, so as to protect the equipment from damage. It can also limit the follow-up time and amplitude to prevent further damage to the equipment.

[0003] The existing lightning arrester includes a mandrel and an insulating shell wrapped around the outer periphery of the mandrel. The insulating shell and the mandrel are integrally molded by injection molding. This method results in a sticky fixation between the insulating shell and the mandrel. Because this sticky fixation method has many sticky surfaces, it is very difficult to separate the insulating shell and the mandrel, which makes it impossible to recycle the old lightning arrester mandrel, resulting in great waste of resources. The present improvement is based on the above problems. SUMMARY

[0004] The utility model aims to provide a lightning arrester, which can realize recycling of the mandrel, thereby reducing resource waste and being environmentally friendly.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: a lightning arrester, comprising a mandrel, an insulating shell sleeved on the outer periphery of the mandrel, and a connector and a base connected to the mandrel, the mandrel comprising an upper end cap and a lower end cap, an upper sealing and fixing assembly detachably mounted between the upper end cap and the upper end of the insulating shell, the connector being fixed to the upper end cap through the upper sealing and fixing assembly, a lower sealing and fixing assembly detachably mounted between the lower end cap and the lower end of the insulating shell, and the base being fixed to the lower end cap through the lower sealing and fixing assembly.

[0006] By adopting the above technical scheme, the sealing between the insulating shell and the mandrel is realized by the cooperation of the upper sealing and fixing assembly and the lower sealing and fixing assembly, thereby ensuring the service life of the lightning arrester. When recycling the mandrel, disassembling the upper sealing and fixing assembly and the lower sealing and fixing assembly can easily separate the mandrel and the insulating shell, thereby recycling the mandrel and reducing resource waste and being environmentally friendly.

[0007] Further provided is that the upper sealing and fixing assembly comprises an upper cover cap covering the upper end cap, an upper sealing ring integrally connected to the insulating shell and extending between the upper cover cap and the upper end cap, and an upper fastener driving the upper cover cap to press and seal the upper sealing ring, the upper fastener connecting the connector and the upper end cap.

[0008] By adopting the technical scheme, the insulating shell is sleeved on the upper end cap in the direction from the upper end cap to the lower end cap, then the upper cover and the connector are sleeved above the upper end cap, the upper sealing ring is located between the upper end cap and the upper cover, and finally the upper fastener is locked to drive the upper cover to press the upper sealing ring to realize sealing and installation and fixation of the connector, so that detachable sealing is realized.

[0009] Further, the upper sealing ring is located between the upper end cap and the upper cover, and the upper fastener is threadedly connected to the upper end cap after sequentially penetrating the connector, the upper cover and the upper sealing ring.

[0010] By adopting the technical scheme, the orientation of the assembly gap is changed by arranging the upper sealing ring on the top of the upper end cap, so as to avoid the penetration of rainwater into the insulating shell through the assembly gap, thereby achieving better sealing effect.

[0011] Further, the lower sealing and fixation assembly comprises a lower cover arranged on the lower end cap and abutting against the insulating shell, and a lower fastener for driving the lower cover to abut against and seal the insulating shell, and the lower fastener is connected to the base and the lower end cap.

[0012] By adopting the technical scheme, the lower fastener drives the lower cover to abut against and seal the insulating shell, and at the same time, the base is fixed on the lower end cap, so that the installation is convenient and the cost is lower.

[0013] Further, the insulating shell is provided with a sealing slot with an opening near the lower sealing and fixation assembly, and the lower fastener drives the lower cover to be inserted into the sealing slot, and the opening of the sealing slot is arranged to face the lower end cap.

[0014] By adopting the technical scheme, the lower fastener drives the lower cover to be inserted into the sealing slot, so as to form sealing between the lower end of the insulating shell and the lower end cap, and the orientation of the assembly gap is changed by arranging the opening of the lower sealing slot to face the lower end cap, so as to avoid the penetration of rainwater into the insulating shell through the assembly gap, thereby achieving better sealing effect.

[0015] Further, a plurality of sealing rings are arranged between the insulating shell and the lower cover.

[0016] By adopting the technical scheme, the plurality of sealing rings are arranged to realize multi-sealing, thereby further improving the sealing performance.

[0017] Further, the mandrel comprises a plurality of varistors stacked between the upper end cap and the lower end cap, a plurality of limiting support bars arranged around the outer periphery of the varistors, a reinforcing rope wound and fixed around the outer periphery of the plurality of limiting support bars, and a tightening bolt for driving the plurality of varistors to abut against each other, and the outer peripheral wall of the upper end cap and the lower end cap is provided with a butt joint slot for embedding the limiting support bar at the position corresponding to each limiting support bar.

[0018] By adopting the technical scheme, the abutting groove cooperates with the limiting support strip to realize the connection between the upper end cap and the lower end cap, then the axis of the mandrel is fixed by rotating the abutting bolt to press the resistor, and the limiting support strip is further fixed by the reinforcing rope, so that the stability of the structure is improved.

[0019] In conclusion, the utility model has the advantages that the utility model can realize the recycling of the mandrel, so as to reduce the waste of resources and be green. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the embodiment;

[0021] Figure 2 It is a sectional view of the embodiment;

[0022] Figure 3 It is Figure 2 It is an enlarged view of A part;

[0023] Figure 4 It is Figure 2 It is an enlarged view of B part;

[0024] Figure 5 It is a partial structure schematic view of the embodiment.

[0025] In the drawing: 1, insulating shell;21, upper end cap;22, lower end cap;23, resistor;24, limiting support strip;25, reinforcing rope;26, abutting bolt;3, connector;4, base;5, upper sealing and fixing assembly;51, upper cover;52, upper sealing ring;53, upper fastener;6, lower sealing and fixing assembly;61, lower cover;62, lower fastener;7, sealing slot;8, sealing ring;9, abutting groove. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with the drawings.

[0027] Reference Figures 1 to 5 A lightning arrester includes a mandrel, an insulating shell 1 sleeved on the outer periphery of the mandrel, and a connector 3 and a base 4 connected to the mandrel. The mandrel includes an upper end cap 21 and a lower end cap 22. An upper sealing and fixing assembly 5 is detachably and sealingly installed between the upper end cap 21 and the upper end of the insulating shell 1, and the connector 3 is fixed to the upper end cap 21 through the upper sealing and fixing assembly 5. A lower sealing and fixing assembly 6 is detachably and sealingly installed between the lower end cap 22 and the lower end of the insulating shell 1, and the base 4 is fixed to the lower end cap 22 through the lower sealing and fixing assembly 6.

[0028] The upper sealing and fixing assembly 5 comprises an upper cover 51 arranged on the upper end cap 21, an upper sealing ring 52 integrally connected to the insulating shell 1 and extending into the upper cover 51 and the upper end cap 21, and an upper fastener 53 for driving the upper cover 51 to press and seal the upper sealing ring 52. The upper fastener 53 is connected to the connector 3 and the upper end cap 21, and the upper sealing ring 52 is located between the upper end cap 21 and the upper cover 51. The upper fastener 53 is a bolt which is screwed into the upper end cap 21 after sequentially penetrating the connector 3, the upper cover 51 and the upper sealing ring 52. The insulating shell 1 and the upper sealing ring 52 are made of silicone rubber.

[0029] The lower sealing and fixing assembly 6 comprises a lower cover 61 arranged on the lower end cap 22 and abutting against the insulating shell 1, and a lower fastener 62 for driving the lower cover 61 to abut and seal the insulating shell 1. The lower fastener 62 is connected to the base 4 and the lower end cap 22. The insulating shell 1 is formed with a sealing slot 7 having an opening near the lower sealing and fixing assembly 6. The lower fastener 62 drives the lower cover 61 to be inserted into the sealing slot 7, and the opening of the sealing slot 7 is arranged towards the side of the lower end cap 22. The lower fastener 62 is a bolt which is screwed into the lower end cap 22 after penetrating the base 4 and the lower cover 72. A plurality of sealing rings 8 are arranged between the insulating shell 1 and the lower cover 61, and the sealing rings 8 are integrally arranged on the insulating shell 1.

[0030] The mandrel further comprises a plurality of resistors 23 stacked between the upper end cap 21 and the lower end cap 22, a plurality of limiting struts 24 arranged around the outer periphery of the resistors 23, a reinforcing rope 25 wound and fixed around the outer periphery of the limiting struts 24, and a pressing bolt 26 for driving the resistors 23 to abut against each other. The outer peripheral wall of the upper end cap 21 and the lower end cap 22 is formed with a butt joint slot 9 corresponding to the position of each limiting strut 24, for embedding the limiting strut 24. The limiting strut 24 is a glass fiber strip, and the reinforcing rope 25 is a resin fiber rope. The pressing bolt 26 is screwed into the lower end cap 22 and abuts against one end of the resistors 23 in the arrangement direction.

[0031] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. A lightning arrester comprising a core, an insulating housing (1) fitted to the outer periphery of the core, and a connector (3) and a base (4) connected to the core, the core comprising an upper end cap (21) and a lower end cap (22), characterized in that: The upper end cap (21) and the upper end of the insulating shell (1) are provided with an upper sealing and fixing assembly (5) which is detachably and sealingly installed, the connector (3) is fixed to the upper end cap (21) through the upper sealing and fixing assembly (5), the lower end cap (22) and the lower end of the insulating shell (1) are provided with a lower sealing and fixing assembly (6) which is detachably and sealingly installed, and the base (4) is fixed to the lower end cap (22) through the lower sealing and fixing assembly (6).

2. The surge arrester of claim 1, wherein: The upper sealing and fixing assembly (5) comprises an upper cover (51) which is arranged on the upper end cap (21), an upper sealing ring (52) which is integrally connected to the insulating shell (1) and extends into the upper cover (51) and the upper end cap (21), and an upper fastener (53) which drives the upper cover (51) to press and seal the upper sealing ring (52), and the upper fastener (53) is connected to the connector (3) and the upper end cap (21).

3. The surge arrester of claim 2, wherein: The upper sealing ring (52) is located between the top of the upper end cap (21) and the upper cover (51), and the upper fastener (53) is sequentially threaded through the connector (3), the upper cover (51) and the upper sealing ring (52), and is screwed with the upper end cap (21).

4. The surge arrester of claim 1, wherein: The lower sealing and fixing assembly (6) comprises a lower cover (61) which is arranged on the lower end cap (22) and abuts against the insulating shell (1), and a lower fastener (62) which drives the lower cover (61) to abut and seal the insulating shell (1), and the lower fastener (62) is connected to the base (4) and the lower end cap (22).

5. The surge arrester of claim 4, wherein: The insulating shell (1) is provided with a sealing slot (7) having an opening near the lower sealing and fixing assembly (6), the lower fastener (62) drives the lower cover (61) to be inserted into the sealing slot (7), and the opening of the sealing slot (7) is arranged towards the side of the lower end cap (22).

6. The surge arrester of claim 1, wherein: A plurality of sealing rings (8) are arranged between the insulating shell (1) and the lower cover (61).

7. The surge arrester of claim 1, wherein: The mandrel comprises a plurality of variable resistors (23) which are stacked between the upper end cap (21) and the lower end cap (22), a plurality of limiting support bars (24) which are arranged around the outer periphery of the variable resistors (23), a reinforcing rope (25) which is wound and fixed around the outer periphery of the plurality of limiting support bars (24), and a pressing bolt (26) which drives the plurality of variable resistors (23) to abut against each other, and the outer peripheral wall of the upper end cap (21) and the lower end cap (22) is provided with a butt joint embedding groove (9) for embedding the limiting support bar (24) at the position corresponding to each limiting support bar (24).

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