阅读说明：本技术 避雷器脱离器装置 (Arrester disconnector device ) 是由 陈小倩 刘剑 毕炳昌 毛放 毕伟灿 陈德豪 熊国锟 于 2019-11-01 设计创作，主要内容包括：本发明涉及一种避雷器脱离器装置,包括导线、避雷器以及电蚀丝。避雷器的一端设有第一电极,另一端设有第二电极,第一电极邻近导线且与导线间隔设置,第一电极与导线之间形成主间隙,第二电极远离导线；电蚀丝的一端用于与接地线连接,另一端与避雷器的远离导线的一端连接,电蚀丝与第二电极间隔设置,电蚀丝与第二电极之间形成辅间隙。上述的避雷器脱离器装置,能应用于带串联空气间隙避雷器上,用于在避雷器击穿后切断放电通道,从而很好地解决了带串联空气间隙避雷器易发生频繁的放电、引起线路跳闸的问题。整个设备不再接地,放电通道被切断,也就不再成为线路上的薄弱点。(The invention relates to a lightning arrester disconnector device, which comprises a lead, a lightning arrester and an electric erosion wire. One end of the lightning arrester is provided with a first electrode, the other end of the lightning arrester is provided with a second electrode, the first electrode is adjacent to the lead and is arranged at intervals with the lead, a main gap is formed between the first electrode and the lead, and the second electrode is far away from the lead; one end of the electric erosion wire is used for being connected with the grounding wire, the other end of the electric erosion wire is connected with one end, far away from the conducting wire, of the lightning arrester, the electric erosion wire and the second electrode are arranged at intervals, and an auxiliary gap is formed between the electric erosion wire and the second electrode. The arrester disconnector device can be applied to the arrester with the series air gap and used for cutting off a discharge channel after the arrester is broken down, so that the problems that the arrester with the series air gap is easy to generate frequent discharge and cause line tripping are well solved. The whole device is no longer grounded and the discharge channel is cut off, which no longer becomes a weak point on the line.)

1. An arrester disconnector arrangement, comprising:

a wire;

the lightning arrester comprises a lightning arrester body, a first electrode and a second electrode, wherein one end of the lightning arrester body is provided with the first electrode, the other end of the lightning arrester body is provided with the second electrode, the first electrode is close to the conducting wire and is arranged at an interval with the conducting wire, a main gap is formed between the first electrode and the conducting wire, and the second electrode is far away from the conducting wire;

one end of the electric erosion wire is used for being connected with a grounding wire, the other end of the electric erosion wire is connected with one end, far away from the conducting wire, of the lightning arrester, the electric erosion wire and the second electrode are arranged at intervals, and an auxiliary gap is formed between the electric erosion wire and the second electrode.

2. The arrester disconnector arrangement according to claim 1, wherein an end of the arrester remote from the conductor wire is provided with a connection portion, and an end of the electrolytic wire for remote from the ground wire is electrically connected to the connection portion.

3. The arrester disconnector arrangement of claim 1, wherein the main gap, the arrester, and the auxiliary gap are connected in series in sequence.

4. The arrester disconnector device according to claim 2, further comprising a transparent protective sheath, wherein the electric erosion wire is accommodated in the protective sheath, one end of the protective sheath is sleeved on the connecting portion, and the other end of the protective sheath is used for sleeving one end of the grounding wire connected with the electric erosion wire.

5. The arrester disconnector arrangement of claim 4, wherein the protective sheath defines an opening, the opening facing the second electrode.

6. The arrester disconnector apparatus according to claim 2, wherein the electric erosion wire comprises a first electric erosion wire body, an ablation section and a second electric erosion wire body which are connected in sequence, the ablation section faces the second electrode and is arranged at a distance from the second electrode, the first electric erosion wire body is connected with the connecting portion, the second electric erosion wire body is used for being connected with the ground wire, and the diameter of the ablation section is smaller than the diameter of the first electric erosion wire body and the diameter of the second electric erosion wire body respectively.

7. The arrester disconnector arrangement of claim 6, wherein the connection portion is provided with a clamping member that clamps an end of the first wire body distal from the ablation section.

8. The arrester disconnector arrangement of claim 1, wherein the galvanic wires are aluminum alloy wires.

9. The arrester disconnector arrangement of claim 8, wherein the galvanic wires are aluminum antimony alloy wires.

10. The arrester disconnector arrangement of claim 1, wherein the arcing duration in the auxiliary gap is 150-; after the lightning arrester is broken down, the arcing time in the auxiliary gap is 200-.

Technical Field

The invention relates to the technical field of lightning arresters, in particular to a lightning arrester disconnector device.

Background

Lightning protection has always been one of the major work points in the operation and maintenance of 10kV overhead lines. In order to prevent lightning, the power grid enterprises widely use the zinc oxide lightning arrester, which comprises a gapless lightning arrester and a lightning arrester with a series air gap, and the zinc oxide lightning arrester has the function of increasing a weak point on a line to enable lightning strike discharge to occur at the zinc oxide lightning arrester, so that an insulator and equipment are protected from lightning strike. The lightning arrester with the series air gap is mainly used for line lightning protection due to the characteristic that the lightning arrester cannot cause long earth fault after breakdown; the gapless lightning arrester is often installed in the platform area and the equipment, and is used for lightning protection and overvoltage prevention in the system. The principle of the existing hot-melting or hot-explosion type arrester disconnector of the gapless arrester is that leakage current of the gapless arrester under power frequency voltage is utilized, when the arrester is punctured, the leakage current is increased, resistance wire temperature in the disconnector is gradually increased, and after the arrester is punctured to a certain degree, a fuse wire or explosive is melted to enable the disconnector to work, so that the arrester falls off, and a discharge channel is cut off. However, for the arrester with the air gap in series connection, no leakage current exists due to the isolation effect of the air gap, so that the hot-melting or hot-explosion type arrester disconnector cannot work normally; after the lightning arrester with the series air gap is broken down, although long earth faults cannot be caused, the lightning impulse discharge voltage of the lightning arrester is lower than that of a line insulator, so that the lightning arrester can become a weak point of a line, and when a lightning overvoltage occurs next time, the lightning arrester can discharge more frequently to cause line tripping.

Disclosure of Invention

In view of the above, it is necessary to provide a disconnector device for an arrester, which is likely to cause frequent discharge and trip of a line.

A surge arrester disconnector arrangement comprising:

a wire;

the lightning arrester comprises a lightning arrester body, a first electrode and a second electrode, wherein one end of the lightning arrester body is provided with the first electrode, the other end of the lightning arrester body is provided with the second electrode, the first electrode is close to the conducting wire and is arranged at an interval with the conducting wire, a main gap is formed between the first electrode and the conducting wire, and the second electrode is far away from the conducting wire;

one end of the electric erosion wire is used for being connected with a grounding wire, the other end of the electric erosion wire is connected with one end, far away from the conducting wire, of the lightning arrester, the electric erosion wire and the second electrode are arranged at intervals, and an auxiliary gap is formed between the electric erosion wire and the second electrode.

In one embodiment, one end of the lightning arrester, which is far away from the conducting wire, is provided with a connecting part, and one end of the electric erosion wire, which is far away from the grounding wire, is electrically connected with the connecting part.

In one embodiment, the main gap, the arrester and the auxiliary gap are connected in series in sequence.

In one embodiment, the arrester disconnector device further includes a transparent protective sleeve, the electric erosion wire is accommodated in the protective sleeve, one end of the protective sleeve is sleeved on the connecting portion, and the other end of the protective sleeve is used for being sleeved on one end of the grounding wire connected with the electric erosion wire.

In one embodiment, the protective sheath defines an opening facing the second electrode.

In one embodiment, the electric erosion wire comprises a first electric erosion wire body, an ablation section and a second electric erosion wire body which are connected in sequence, the ablation section faces the second electrode and is arranged at an interval with the second electrode, the first electric erosion wire body is connected with the connecting portion, the second electric erosion wire body is used for being connected with the grounding wire, and the diameter of the ablation section is smaller than that of the first electric erosion wire body and that of the second electric erosion wire body respectively.

In one embodiment, the connecting portion is provided with a clamping member which clamps an end of the first wire body remote from the ablation section.

In one embodiment, the electroerosion wire is an aluminum alloy wire.

In one embodiment, the electroerosion wire is an aluminum antimony alloy wire.

In one embodiment, when the lightning arrester is not broken down, the arcing duration in the auxiliary gap is 150-; after the lightning arrester is broken down, the arcing time in the auxiliary gap is 200-.

According to the lightning arrester disconnector device, due to the isolation effect of the main gap, the lightning arrester and the auxiliary gap do not bear the system power frequency voltage on the lead; when lightning overvoltage is generated on a lead, the main gap is broken down to discharge, then the lightning arrester and the auxiliary gap discharge to the ground wire, the lightning current is released to the ground, after the lightning overvoltage is released, the lightning arrester immediately cuts off power frequency follow current, the insulation of the main gap is recovered, and the system is recovered to be normal; when the lightning arrester is broken down, the power frequency follow current cannot be cut off, the power frequency follow current continuously arcs on the main gap and the auxiliary gap, and the electric erosion wire in the auxiliary gap is ablated and fused to disconnect the connection between the electric erosion wire and the grounding wire, so that a discharging channel is cut off, and the system returns to normal; the arrester disconnector device can be applied to the arrester with the series air gap and used for cutting off a discharge channel after the arrester is broken down, so that the problems that the arrester with the series air gap is easy to generate frequent discharge and cause line tripping are well solved.

Drawings

Fig. 1 is a schematic circuit diagram illustrating an embodiment of a disconnector device for an arrester, in which an electric erosion wire is not blown;

fig. 2 is a schematic circuit structure diagram of an arrester disconnector device according to an embodiment after the electric erosion wire is broken.

Detailed Description

In order to facilitate an understanding of the present invention, a lightning arrester disconnector arrangement will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the arrester disconnector arrangement are shown in the drawings. However, the arrester disconnector arrangement may be realized in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the arrester disconnector arrangement is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, a lightning arrester disconnector arrangement comprises a conductor wire, a lightning arrester and an erosion wire. A first electrode is arranged at one end of the lightning arrester, a second electrode is arranged at the other end of the lightning arrester, the first electrode is adjacent to the lead and is arranged at an interval with the lead, a main gap is formed between the first electrode and the lead, and the second electrode is far away from the lead; one end of the electric erosion wire is used for being connected with a grounding wire, the other end of the electric erosion wire is connected with one end, far away from the conducting wire, of the lightning arrester, the electric erosion wire and the second electrode are arranged at intervals, and an auxiliary gap is formed between the electric erosion wire and the second electrode. In one embodiment, an arrester disconnector arrangement comprises a conductor wire, an arrester and an erosion wire. In one embodiment, one end of the lightning arrester is provided with a first electrode, the other end of the lightning arrester is provided with a second electrode, the first electrode is adjacent to the conducting wire and is arranged at a distance from the conducting wire, a main gap is formed between the first electrode and the conducting wire, and the second electrode is far away from the conducting wire; in one embodiment, one end of the electric erosion wire is used for being connected with a grounding wire, the other end of the electric erosion wire is connected with one end, far away from the conducting wire, of the lightning arrester, the electric erosion wire and the second electrode are arranged at intervals, and an auxiliary gap is formed between the electric erosion wire and the second electrode.

As shown in fig. 1, an arrester disconnector arrangement 10 of an embodiment includes a conductor wire 100, an arrester 200, and an erosion wire 300. One end of the lightning arrester 200 is provided with a first electrode 210, the other end is provided with a second electrode 220, the first electrode 210 is adjacent to the conducting wire 100 and is arranged at a distance from the conducting wire 100, a main gap 400 is formed between the first electrode 210 and the conducting wire 100, and the second electrode 220 is far away from the conducting wire 100. One end of the electric erosion wire 300 is used for being connected with the ground wire 20, the other end of the electric erosion wire is connected with one end of the lightning arrester 200 far away from the conducting wire 100, the electric erosion wire 300 and the second electrode 220 are arranged at intervals, and an auxiliary gap 500 is formed between the electric erosion wire 300 and the second electrode 220. In this embodiment, the lightning arrester 200 is made of zinc oxide. In this embodiment, the wire 300 is used to ablate and melt when the secondary gap 500 is generating a sustained arcing. In one embodiment, the main gap 400, the surge arrester 200, and the auxiliary gap 500 are connected in series.

In the above arrester disconnector device 10, due to the isolation function of the main gap 400, the arrester 200 and the auxiliary gap 500 do not bear the system power frequency voltage on the wire 100; when lightning overvoltage is generated on the lead 100, the main gap 400 is broken down to discharge, then the ground wire 20 is discharged through the lightning arrester 200 and the auxiliary gap 500, the lightning current is released to the ground, after the lightning overvoltage is released, the lightning arrester 200 immediately cuts off power frequency follow current, the main gap 400 recovers insulation, and the system recovers to be normal; when the lightning arrester 200 is broken down, the power frequency follow current cannot be cut off, the power frequency follow current continuously arcs on the main gap 400 and the auxiliary gap 500, the electric erosion wire 300 in the auxiliary gap 500 is ablated and fused, the connection between the electric erosion wire 300 and the grounding wire 20 is disconnected, the discharging channel is cut off, and the system returns to normal; the arrester disconnector device 10 can be applied to the arrester 200 with the series air gap and used for cutting off a discharge channel after the arrester 200 is broken down, so that the problem that the arrester 200 with the series air gap is easy to generate frequent discharge and cause line tripping is well solved. The wire 300 is connected to the ground line 20 as a part of the discharge path, and when the wire 300 is blown, the entire device is no longer grounded, and the discharge path is cut off, which is no longer a weak point on the line.

In order to facilitate the connection of the ground wire 20 with the lightning arrester 200, in one embodiment, a connecting portion is provided at an end of the lightning arrester 200 away from the conducting wire 100, an end of the electric erosion wire 300 away from the ground wire 20 is electrically connected with the connecting portion, and the ground wire 20 is electrically connected with the lightning arrester 200 through the electric erosion wire 300 by providing the connecting portion, so as to facilitate the discharge of the lightning current to the ground.

In order to protect the electric erosion wire 300 and facilitate observing the state of the electric erosion wire 300, in one embodiment, the arrester disconnector device 10 further includes a transparent protective sleeve, the electric erosion wire 300 is accommodated in the protective sleeve, one end of the protective sleeve is sleeved on the connecting portion, and the other end of the protective sleeve is used for being sleeved on one end of the ground wire 20 connected to the electric erosion wire 300. The electric erosion wire 300 is accommodated in the protective sleeve, so that the electric erosion wire 300 is protected from being eroded by the external environment, and the transparent protective sleeve is convenient for observing the state of the electric erosion wire 300 and observing whether the electric erosion wire 300 is fused or not. In one embodiment, the protective sheath is a rigid protective sheath made of, for example, tempered glass or plexiglass; alternatively, the protective sheath is a flexible protective sheath, for example made of transparent plastic.

In other embodiments, the arrester disconnector arrangement further comprises a transparent protective sleeve, wherein the electric erosion wire 300 is partially accommodated in the protective sleeve, and partially extends through the transparent protective sleeve and is electrically connected to the connection portion. Further, in one embodiment, the electric erosion wire 300 has a first end connected to the ground line and a second end electrically connected to the connecting portion, and the remaining portion of the electric erosion wire 300 except the first end and the second end is accommodated in the transparent protective cylinder. Further, in one embodiment, the protective cylinder is a rigid protective cylinder made of, for example, tempered glass or organic glass.

To facilitate the arcing ablation to fuse the wire 300, in one embodiment, the protective sheath defines an opening facing the second electrode 220. Thus, at least part of the electric erosion wire 300 is exposed out of the protective sleeve and forms the auxiliary gap 500 with the second electrode 220, so that the part exposed out of the opening can be ablated and fused when the power frequency follow current continuously arcs on the auxiliary gap 500.

In order to enhance the connection strength between the electric erosion wire 300 and the connection portion and the ground wire 20 and ensure that the electric erosion wire 300 is easily ablated and fused, in one embodiment, the electric erosion wire 300 includes a first electric erosion wire 300 body, an ablation section and a second electric erosion wire 300 body which are sequentially connected, the ablation section faces the second electrode 220 and is arranged at an interval with the second electrode 220, the first electric erosion wire 300 body is connected with the connection portion, the second electric erosion wire 300 body is used for being connected with the ground wire 20, and the diameter of the ablation section is smaller than the diameter of the first electric erosion wire 300 body and the diameter of the second electric erosion wire 300 body respectively. In this embodiment, the secondary gap 500 is formed between the ablation segment and the second electrode 220. Through setting up first electric erosion wire 300 body, ablation section and second electric erosion wire 300 body, will ablate the section and be connected with connecting portion and earth connection 20 respectively through first electric erosion wire 300 body, second electric erosion wire 300 body for the part of connecting can the diameter great, and intensity is big, can strengthen the connection, and ablation section diameter is little some be convenient for by ablation fusing.

To facilitate replacement of the wire 300, in one embodiment, the connecting portion is provided with a clamping member that clamps an end of the first wire 300 body distal from the ablation section. When the electric erosion wire 300 needs to be replaced, for example, after the electric erosion wire 300 is ablated and melted, a new electric erosion wire 300 needs to be replaced, the first electric erosion wire 300 body is detached from the clamping member, and then the new electric erosion wire 300 can be clamped on the clamping member to realize connection with the connecting part.

In order to improve the performance of the electric erosion wire 300, in one embodiment, the electric erosion wire 300 is an aluminum alloy wire. The electric erosion wire 300 made of the aluminum alloy wire material is acid and alkali resistant, corrosion resistant, good in toughness and strength, convenient to fuse, dustproof and capable of avoiding adhering, blocking and ablating dust.

In order to improve the performance of the electric erosion wire 300, in one embodiment, the electric erosion wire 300 is an aluminum antimony alloy wire, and on the basis of ensuring acid and alkali resistance, corrosion resistance, good toughness and good strength, the electric erosion wire 300 has higher hardness and lower melting point, so that the electric erosion wire 300 has stronger performance and is convenient to be used as the electric erosion wire 300 with the auxiliary gap 500.

In one embodiment, when the lightning arrester 200 is not broken down, the arcing duration in the auxiliary gap 500 is 150-; after the lightning arrester 200 breaks down, the arcing time in the auxiliary gap 500 is 200 and 500 milliseconds. When lightning overvoltage is generated on the lead 100, the main gap 400 is firstly punctured to discharge, then the lightning current is discharged to the ground through the lightning arrester 200 body and the auxiliary gap 500, the lightning current is released to the ground, the process is equal to the main lightning discharge time, which is about 150 plus 500 microseconds, and when the lightning arrester 200 body is not punctured, the arcing time in the auxiliary gap 500 is 150 plus 500 microseconds; after the main body of the lightning arrester 200 is broken down, the auxiliary gap 500 is ignited until the breaker trips, generally 200 plus 500 milliseconds, the arcing time difference between the two conditions is close to 1000 times, and the difference of the ablation action on the electric erosion wire 300 is great, so that the electric erosion wire 300 cannot be blown when the main body of the lightning arrester 200 is not broken down, and the electric erosion wire 300 can be blown after the main body of the lightning arrester 200 is broken down.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.