CN117638529A - Lightning arrester - Google Patents

Abstract

The embodiment of the application discloses arrester, including arrester element and cable connection annex, cable connection annex includes guide bar, arrester joint and cable joint, and arrester joint is connected with arrester element electricity, and cable joint is used for being connected with cable electricity. The whole that cable connection annex and arrester component are constituteed is through pouring connection and be in outside insulating layer is outside to cable connection annex, and outside insulating layer has the cable connecting hole with the cable joint intercommunication, and the cable connecting hole is used for supplying the cable to be connected with the cable joint to reserve a plurality of outside electrical connection mouth. The application discloses a lightning arrester, lightning arrester element adopts integration pouring to seal insulating connection admittedly with cable junction accessory, has thoroughly stopped hidden danger such as lightning arrester element and cable junction accessory sealing contact face foreign matter invasion and air remain in the installation, can not form partial discharge hidden danger point, has improved the security that the lightning arrester used, guarantees the safe operation of whole medium voltage distribution system.

Description

Lightning arrester

Technical Field

The application relates to the technical field of lightning arresters of power systems, in particular to a lightning arrester.

Background

The arrester is an electric appliance for protecting electric appliances from high transient overvoltage and limiting the amplitude of freewheel, and is widely used in electric power systems.

At present, china has raised the climax of medium voltage distribution system re-update, re-upgrade and re-construction, and a large number of lightning arresters are used in switch cabinets and are connected with incoming and outgoing cables through cable connection accessories.

However, in the connection and installation process of the cable connection accessory and the lightning arrester, foreign matters invade and air remains exist between the lightning arrester and the cable connection accessory, so that partial discharge hidden danger points are formed, and the safe operation of the whole medium-voltage distribution system is affected.

Therefore, how to avoid the invasion of foreign matters and air residues between the red lightning arrester and the cable connection accessory during the installation process is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The application provides a lightning arrester to foreign matter invasion and air residue between lightning arrester and the cable junction annex in the installation are avoided.

In order to achieve the above object, the present application provides a lightning arrester comprising a lightning arrester element and a cable connection accessory,

the cable connection accessory comprises a guide rod, a lightning arrester connector and a cable connector, wherein the lightning arrester connector and the cable connector are connected with the guide rod, the lightning arrester connector is electrically connected with the lightning arrester element, the cable connector is used for being electrically connected with a cable,

the cable connection accessory and the lightning arrester element are integrally connected through casting, an external insulating layer is formed outside the cable connection accessory, the external insulating layer is provided with a cable connection hole, and the cable connection hole is used for connecting a cable with the cable connector.

Preferably, in the lightning arrester, the lightning arrester connector and the cable connector are located on the same side in the longitudinal direction of the guide rod.

Preferably, in the lightning arrester, the lightning arrester connector and the cable connector are distributed in a staggered manner in the circumferential direction of the guide rod.

Preferably, in the lightning arrester, the included angles between the lightning arrester connector and the cable connector and the guide rod are the same.

Preferably, in the above arrester, the arrester element includes an upper electrode, an insulating cylinder, a resistive sheet and a lower electrode,

the resistor disc is arranged in the insulating cylinder,

the lower electrode is arranged at the first end of the insulating cylinder in the length direction and is abutted against the resistor disc,

the upper electrode is arranged at the second end of the insulating cylinder in the length direction and is abutted to the resistor disc, and the upper electrode is connected with the lightning arrester connector.

Preferably, in the lightning arrester, the upper electrode is connected with the insulating cylinder in a threaded or plug-in connection manner.

Preferably, in the lightning arrester, the lower electrode is connected with the insulating cylinder in a threaded or plug-in connection manner.

Preferably, in the lightning arrester, a grounding bolt is provided on the lower electrode.

Preferably, in the lightning arrester, the resistor sheet is a nonlinear metal oxide resistor sheet.

Preferably, in the lightning arrester, the external insulating layer is an epoxy resin layer.

The arrester that this embodiment provided, including arrester component and cable junction annex, cable junction annex includes guide bar, arrester joint and cable joint, and arrester joint and cable joint are connected with the guide bar, and arrester joint is connected with arrester component electricity, and cable joint is used for being connected with cable electricity. The whole that cable connection annex and arrester component are constituteed is through pouring connection and be in outside insulating layer is outside to cable connection annex, and outside insulating layer has the cable connecting hole with the cable joint intercommunication, and the cable connecting hole is used for supplying the cable to be connected with the cable joint to reserve a plurality of outside electrical connection mouth. The application discloses a lightning arrester, lightning arrester element adopts integration pouring to seal insulating connection admittedly with cable junction accessory, has thoroughly stopped hidden danger such as lightning arrester element and cable junction accessory sealing contact face foreign matter invasion and air remain in the installation, can not form partial discharge hidden danger point, has improved the security that the lightning arrester used, guarantees the safe operation of whole medium voltage distribution system.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to obtain other drawings from the provided drawings without inventive effort, and to apply the present application to other similar situations from the provided drawings. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.

Fig. 1 is a schematic structural view of the lightning arrester of the present application;

fig. 2 is a schematic view of the structure of the cable attachment (without external insulation) of the lightning arrester of the present application;

fig. 3 is a front view of a cable attachment accessory (without an external insulation layer) of the arrester of the present application;

fig. 4 is a schematic structural view of an arrester element of the arrester of the present application;

fig. 5 is a cross-sectional view of a lightning arrester element of the lightning arrester of the present application.

Wherein:

1-an arrester element; 11-upper electrode; 12-an insulating cylinder; 13-a resistor sheet; 14-a lower electrode; 15-a grounding bolt; 2-a cable connection accessory; 21-a guide rod; 22-lightning arrester joints; 23-cable connector; 24-an outer insulating layer.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting of the application. The described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that, for convenience of description, only a portion related to the related application is shown in the drawings. Embodiments and features of embodiments in this application may be combined with each other without conflict.

It should be appreciated that "system," "apparatus," "unit" and/or "module" as used in this application is one method for distinguishing between different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.

Wherein, in the description of the embodiments of the present application, "/" means or is meant unless otherwise indicated, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" means two or more than two.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

Please refer to fig. 1-5.

Some embodiments of the application disclose a lightning arrester comprising a lightning arrester element 1 and a cable connection accessory 2, the lightning arrester being connected to a cable by the lightning arrester element 1.

The arrester element 1 is used to provide overvoltage protection. The arrester element 1 is electrically connected to the cable via a cable connection accessory 2.

The cable connection accessory 2 comprises a guide rod 21, a lightning arrester connector 22 and a cable connector 23, wherein the lightning arrester connector 22 and the cable connector 23 are connected with the guide rod 21, the lightning arrester connector 22 is electrically connected with the lightning arrester element 1, and the cable connector 23 is used for being electrically connected with a cable.

The whole of the cable connection accessory 2 and the lightning arrester element 1 is connected by casting and an external insulating layer 24 is formed outside the cable connection accessory 2, the external insulating layer 24 is provided with a cable connection hole communicated with the cable joint 23, and the cable connection hole is used for connecting a cable with the cable joint 23 so as to reserve a plurality of external electric connection ports.

The lightning arrester element 1 is connected with the lightning arrester connector 22 of the cable connection accessory 2, and then the whole body formed by the lightning arrester element 1 and the cable connection accessory 2 is put into a mould, and then is poured and solidified to form the integrated lightning arrester with the cable connection hole.

The casting material forms an outer insulating layer 24 outside the cable connection accessory 2, the outer insulating layer 24 sealing, insulating and externally soft protecting the cable connection piece and the lightning arrester element 1 cast inside, while retaining cable connection holes for realizing the connection of the cable with the cable connector 23.

The application discloses a lightning arrester, lightning arrester element 1 adopts integration pouring to seal insulating connection admittedly with cable junction annex 2, has thoroughly stopped hidden danger such as lightning arrester element 1 and cable junction annex 2 sealing contact surface foreign matter invasion and air remain in the installation, can not form partial discharge hidden danger point, has improved the security that the lightning arrester used, guarantees the safe operation of whole middling pressure distribution system.

The lightning arrester element 1 and the cable connection accessory 2 are integrally cast and connected, the connection condition of the lightning arrester element 1 and the cable connection accessory 2 is not influenced by the skill of constructors, and meanwhile, the connection position of the lightning arrester element 1 and the cable connection accessory 2 is cast and fixedly sealed, so that the lightning arrester can be suitable for severe field environments.

In some embodiments of the present application, the lightning arrester element 1 and the cable attachment 2 are connected by epoxy resin casting, so that the casting-connected lightning arrester has good insulation properties and mechanical strength.

The cable attachment 2 has a lightning arrester connector 22 and a plurality of cable connectors 23. The lightning arrester connector 22 and the plurality of cable connectors 23 are disposed along the length direction of the guide rod 21.

The guide rod 21, the lightning arrester connector 22 and the cable connector 23 of the cable connection accessory 2 can be integrally formed, can be connected by welding, can be connected by clamping, and can be connected by plugging.

In some embodiments of the present application, the lightning arrester connector 22 and the cable connector 23 are located on the same side of the length direction of the guide rod 21, and this arrangement mode can reduce the overall volume of the lightning arrester and reduce the limitation of the space in the switch cabinet to the installation of the lightning arrester.

In the embodiment in which the lightning arrester connector 22 and the cable connector 23 are located on the same side of the length direction of the guide bar, the lightning arrester after casting and curing is in an elongated shape as a whole.

In other embodiments of the present application, the lightning arrester connector 22 and the cable connector 23 are distributed in a staggered manner in the circumferential direction of the guide rod 21, and this arrangement can improve the flexibility of connecting the lightning arrester with the cable.

The angle between the lightning arrester connector 22 and the flow guiding rod 21 and the angle between the cable connector 23 and the flow guiding rod 21 can be the same or different.

In embodiments where the angle between the lightning conductor 22 and the deflector rod 21 is the same as the angle between the cable connector 23 and the deflector rod 21, the lightning conductor 22 and the cable connector 23 may be perpendicular to the deflector rod 21.

As shown in fig. 3, the lightning arrester connector 22 and the cable connector 23 each include a branch flow guide rod and a connector, one end of the branch flow guide rod is connected with the flow guide rod 21, the other end of the branch flow guide rod is connected with the connector, the size of the end of the connector connected with the branch flow guide rod is smaller, the size of the end of the connector not connected with the branch flow guide rod is larger, and a step surface is provided in the middle of the connector.

The shape of the connector is not limited to the above embodiment, and the shape of the connector is designed according to the lightning arrester and the cable. The shape of the lightning arrester connector 22 and the cable connector 23 may be the same or different.

The cable connecting hole is formed in the casting process, and the cable connecting hole does not need to be independently formed.

As shown in fig. 5, the arrester element 1 includes an upper electrode 11, an insulating cylinder 12, a resistive sheet 13, and a lower electrode 14.

The resistor 13 is mounted in the insulating tube 12, the upper electrode 11 is mounted at one end of the insulating tube 12 and abuts against the resistor 13, and the lower electrode 14 is mounted at the other end of the insulating tube 12 and abuts against the resistor 13.

The upper electrode 11 is connected to the arrester junction 22, and preferably, the upper electrode 11 has the same shape as the arrester junction 22.

The upper electrode 11 and the lower electrode 14 are both made of a metal material.

In some embodiments of the present application, the upper electrode 11 is threadably connected to the insulating cylinder 12, and/or the lower electrode 14 is threadably connected to the insulating cylinder 12.

Specifically, the end of the upper electrode 11 connected to the insulating cylinder 12 is provided with external threads, the end of the lower electrode 14 connected to the insulating cylinder 12 is provided with external threads, and the end of the insulating cylinder 12 connected to the upper electrode 11 and the lower electrode 14 is provided with internal threads.

The upper electrode 11 and the lower electrode 14 are connected with the insulating cylinder 12 through threads, so that not only can the upper electrode 11 and the lower electrode 14 be fixed on the insulating cylinder 12, but also sealing and mechanical protection effects can be provided, and meanwhile, the pressing force between the upper electrode 11 and the lower electrode 14 and the resistor disc 13 can be adjusted by rotating the upper electrode 11 and the lower electrode 14, so that the upper electrode 11 and the lower electrode 14 are ensured to be in close contact with the resistor disc 13.

The upper electrode 11 and the lower electrode 14 can also be connected with the insulating cylinder 12 in a plug-in manner.

The end of the lower electrode 14 located outside the insulating cylinder 12 is provided with a grounding bolt 15.

The resistor sheet 13 is a nonlinear metal oxide resistor, and is in a low-resistance state in an overvoltage state, so that the overvoltage protection function is realized.

Before casting, firstly assembling the lightning arrester element 1, then fixedly connecting the assembled lightning arrester element 1 with the lightning arrester connector 22 of the cable connection accessory 2 through a clamping groove, and finally, putting the whole body formed by the lightning arrester element 1 and the cable connection accessory 2 into a mould, and casting and curing by using epoxy resin to form the integrated lightning arrester with the cable connection hole.

The deflector, the lightning arrester connector 22 and the cable connector 23 are all made of conductive metal materials. The flow guiding rod 21 is used for providing an electric connection channel and can flow a large current; the lightning arrester connector 22 can be fixedly connected with the upper electrode 11 of the lightning arrester element 1 in a sealing way through a clamping groove; the cable connector 23 is adapted to be connected to an external cable connector.

The foregoing description is only illustrative of the preferred embodiments of the present application and the principles of the technology applied, and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. The scope of the application is not limited to the specific combination of the technical features described above, but also covers other technical solutions formed by any combination of the technical features described above or their equivalents without departing from the concept of the application described above. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims (10)

1. A lightning arrester is characterized by comprising a lightning arrester element (1) and a cable connection accessory (2),

the cable connection accessory (2) comprises a guide rod (21), a lightning arrester connector (22) and a cable connector (23), wherein the lightning arrester connector (22) and the cable connector (23) are connected with the guide rod (21), the lightning arrester connector (22) is electrically connected with the lightning arrester element (1), the cable connector (23) is used for being electrically connected with a cable,

the cable connection accessory (2) and the lightning arrester element (1) are integrally connected through casting, an outer insulating layer (24) is formed outside the cable connection accessory (2), and the outer insulating layer (24) is provided with a cable connection hole which is used for connecting a cable with the cable connector (23).

2. The arrester of claim 1, wherein the arrester connection (22) and the cable connection (23) are located on the same side in the length direction of the deflector rod (21).

3. The arrester according to claim 1, characterized in that the arrester connection (22) and the cable connection (23) are offset in the circumferential direction of the deflector rod (21).

4. A lightning arrester according to claim 1, characterized in that the angle between the lightning arrester connection (22) and the cable connection (23) and the deflector rod (21) is the same.

5. The arrester according to claim 1, characterized in that the arrester element (1) comprises an upper electrode (11), an insulating cylinder (12), a resistive sheet (13) and a lower electrode (14),

the resistor (13) is arranged in the insulating cylinder (12),

the lower electrode (14) is mounted on a first end of the insulating cylinder (12) in the length direction and is abutted against the resistor sheet (13),

the upper electrode (11) is mounted at a second end of the insulating cylinder (12) in the length direction and is in contact with the resistor sheet (13), and the upper electrode (11) is connected with the lightning arrester connector (22).

6. The lightning arrester according to claim 5, characterized in that the upper electrode (11) is screwed or plug-connected with the insulating cylinder (12).

7. The lightning arrester according to claim 5, characterized in that the lower electrode (14) is screwed or plug-connected with the insulating cylinder (12).

8. The lightning arrester according to claim 5, characterized in that the lower electrode (14) is provided with a grounding bolt (15).

9. A lightning arrester according to claim 5, characterized in that the resistive sheet (13) is a non-linear metal oxide resistive sheet.

10. The arrester of claim 1 wherein the outer insulating layer (24) is an epoxy layer.