阅读说明：本技术 一种配电线路的避雷装置 (Lightning arrester of distribution line ) 是由 梁万龙 于 2020-07-02 设计创作，主要内容包括：本发明实施例公开了一种配电线路的避雷装置,包括避雷器外壳,所述避雷器外壳内安装有与配电线路连接的火花间隙构件和设置在火花间隙构件下方且用于连接火花间隙构件和大地的阀片电阻构件,所述阀片电阻构件包括两个相对设置且用于拉长电弧形成主火花间隙的第一灭弧构件和第二灭弧构件,所述避雷器外壳上设置有安装在第一灭弧构件和第二灭弧构件之间的永磁块,通过磁吸线圈产生磁场,进而配合环形金属片可使第三隔片运动,进一步可使第一灭弧构件与第二灭弧构件上的电极之间的距离别拉长,从而实现灭弧的目的,电极之间的间距被拉长后,可使残存的电弧有足够时间消散,配合所设置的永磁块,其灭弧的效果会更加的出色。(The embodiment of the invention discloses a lightning arrester of a distribution line, which comprises a lightning arrester shell, wherein a spark gap component connected with the distribution line and a valve plate resistance component arranged below the spark gap component and used for connecting the spark gap component with the ground are arranged in the lightning arrester shell, the valve plate resistance component comprises a first arc-extinguishing component and a second arc-extinguishing component which are oppositely arranged and used for lengthening an electric arc to form a main spark gap, a permanent magnet block arranged between the first arc-extinguishing component and the second arc-extinguishing component is arranged on the lightning arrester shell, a magnetic field is generated through a magnetic coil, a third spacer can move by matching with an annular metal sheet, the distance between electrodes on the first arc-extinguishing component and the second arc-extinguishing component can be further lengthened, so that the purpose of arc extinguishing is realized, and after the distance between the electrodes is lengthened, the residual electric arc has enough time, the arc extinguishing effect of the permanent magnet blocks is more excellent.)

1. The utility model provides a lightning arrester of distribution lines, includes arrester shell (1), its characterized in that, install spark gap component (2) and setting in arrester shell (1) and be used for connecting spark gap component (2) and valve block resistance component (3) of ground in spark gap component (2) below with distribution lines is connected, valve block resistance component (3) include two relative settings and are used for lengthening first arc extinguishing component (4) and second arc extinguishing component (5) that electric arc formed main spark gap, be provided with permanent magnetism piece (8) of installing between first arc extinguishing component (4) and second arc extinguishing component (5) on the arrester shell, first arc extinguishing component (4) and distribution lines electric connection, second arc extinguishing component (5) and valve block resistance component (3) electric connection.

2. The lightning protection device for distribution lines according to claim 1, characterized in that the first arc extinguishing member (4) comprises a first spacer (401), a second spacer (402), a first grading resistor (403) of annular structure and a third spacer (404) provided on the arrester casing (1) by means of a spring connection, and a first metal electrode (405) penetrating the first spacer (401) is provided at a central position of the first spacer (401);

the second spacer (402) is provided with a magnetic coil (406) for generating a magnetic field, a second voltage equalizing resistor (407) arranged at the central position below the second spacer (402) and a first annular electrode (408) sleeved on the second voltage equalizing resistor (407), the central position above the second spacer (402) is also provided with a second metal electrode (409) for matching with the first metal electrode (405) to form a first auxiliary spark gap, and two ends of the magnetic coil (406) are respectively connected with the second metal electrode (409) and the first annular electrode (408);

the first voltage-sharing resistor (403) is arranged between the first spacer (401) and the second spacer (402), and two ends of the first voltage-sharing resistor (403) are respectively electrically connected with the first metal electrode (405) and the second metal electrode (409);

the center position department in third spacer (404) top is provided with third metal electrode (410), and the both ends of second equalizer resistance (407) are equallyd divide and are do not had first annular electrode (408) and third metal electrode (410) electric connection third spacer (404) are gone up and still are connected with annular sheetmetal (411) that are used for cooperating magnetism to inhale coil (406) and drive third spacer (404) fortune work through the extension spring.

3. The lightning arrester of distribution line according to claim 1, characterized in that the resistive element (3) comprises a plurality of resistive blades (6) connected in series, and the resistive element (3) is fixedly connected to the spark gap element (2) by screws.

4. A lightning conductor for distribution lines according to claim 2, characterized in that a number of first electrode posts (412) in an annular array on said first annular electrode (408) about the central axis of the second spacer (402), and that a second electrode post (413) forming a second auxiliary spark gap in cooperation with the first electrode posts (412) is provided on said annular metal sheet (411).

5. The lightning arrester of distribution line according to claim 2, characterized in that the second spacer (402) is further provided with a fixing component (7) for fixing the second spacer (402), the fixing component (7) comprises a fixing groove (701) formed in the lightning arrester housing (1) and a power rod (703) rotatably connected to the second spacer (402) through a rotating shaft (702), the power rod (703) is connected with a fixing rod (704) engaged with the fixing groove (701) through a connecting rod, and the first ring electrode (408) is provided with a push rod (705) for pushing the power rod (703) to move.

6. The lightning arrester of distribution line according to claim 5, characterized in that the rotating shaft (702) is provided with a torsion spring.

7. The lightning protection device for distribution lines according to claim 2, characterized in that a ceramic spacer is arranged between each layer of magnetically attracted coils (406).

8. The lightning protection device of a distribution line according to claim 2 or 4, characterized in that the first metal electrode (405), the second metal electrode (409), the third metal electrode (410), the first electrode column (412) and the second electrode column (413) are provided with a tapered contact.

9. A lightning conductor of a distribution line according to claim 1, characterized in that a rubber gasket for cushioning the second spacer (402) is further provided in the lightning conductor housing (1).

10. A lightning conductor for distribution lines according to claim 1, characterized in that the first arc extinguishing member (4) and the second arc extinguishing member (5) are of the same construction.

Technical Field

The invention relates to the technical field of lightning arresters, in particular to a lightning arrester of a power distribution line.

Background

The arrester is used for protecting electrical equipment from being damaged by high transient overvoltage during lightning stroke, limiting follow current time and normally limiting follow current amplitude, is sometimes called an overvoltage protector, is in a high resistance state under normal system working voltage, only microampere current passes through the arrester, and is in a low resistance state under the action of overvoltage and heavy current, so that residual voltage at two ends of the arrester is limited.

The main types of the lightning arrester include a tube type lightning arrester, a valve type lightning arrester and the like, the main working principle of each lightning arrester is different, but the main working principle is the same, and the lightning arrester and the valve type lightning arrester are used for protecting equipment from lightning stroke damage in thunderstorm days.

When the lightning arrester works, breakdown electric arcs can be generated at the air gaps due to the ultrahigh voltage of lightning stroke, for the magnetic blow valve type lightning arrester, the breakdown electric arcs are lengthened by utilizing a magnetic field to achieve the purpose of arc extinction, and the requirement on electrodes is high.

The arc extinguishing effect of the arc under the magnetic field can be influenced by the factors such as burrs, pits and stains on the electrode, the breakdown arc is influenced by the magnetic field, and is also influenced by the factors such as dust, stains, burrs on the surface of the electrode and pits, and after the breakdown arc is extinguished in a long-time use project, the existence of residual arc is easily caused by the influence of various factors, and further the breakdown arc which continuously breaks down the electrode can be generated by taking the arc as a relay, so that the problem is solved.

Disclosure of Invention

The embodiment of the invention discloses a lightning arrester of a distribution line, which achieves the aim of arc extinction by utilizing an electromagnetic field to elongate the distance between electrodes and matching with a permanent magnet, and can solve the problem that the magnetic blow valve type lightning arrester in the prior art is easily influenced by the external environment to continuously generate breakdown electric arcs in long-time use.

The embodiment of the invention provides a lightning arrester of a power distribution line, which comprises a lightning arrester shell, wherein a spark gap component connected with the power distribution line and a valve plate resistance component arranged below the spark gap component and used for connecting the spark gap component with the ground are arranged in the lightning arrester shell, the valve plate resistance component comprises a first arc extinguishing component and a second arc extinguishing component which are oppositely arranged and used for lengthening an electric arc to form a main spark gap, a permanent magnet block arranged between the first arc extinguishing component and the second arc extinguishing component is arranged on the lightning arrester shell, the first arc extinguishing component is electrically connected with the power distribution line, and the second arc extinguishing component is electrically connected with the valve plate resistance component.

As a preferable mode of the present invention, the first arc extinguishing member includes a first spacer, a second spacer, a first grading resistor having an annular structure, and a third spacer provided on the surge arrester housing by a spring connection, and a first metal electrode penetrating the first spacer is provided at a central position of the first spacer;

the second spacer is provided with a magnetic coil for generating a magnetic field, a second voltage-sharing resistor arranged at the central position below the second spacer and a first annular electrode sleeved on the second voltage-sharing resistor, a second metal electrode used for being matched with the first metal electrode to form a first auxiliary spark gap is further arranged at the central position above the second spacer, and two ends of the magnetic coil are respectively connected with the second metal electrode and the first annular electrode;

the first voltage-sharing resistor is arranged between the first spacer and the second spacer, and two ends of the first voltage-sharing resistor are respectively and electrically connected with the first metal electrode and the second metal electrode;

the center position department of third spacer top is provided with the third metal electrode, just the both ends of second equalizer resistor are equallyd divide and are do not had first annular electrode and third metal electrode electric connection still be connected with the annular sheetmetal that is used for cooperating magnetism to inhale the coil and drive third spacer fortune merit on the third spacer through the extension spring.

As a preferable scheme of the present invention, the valve plate resistance member includes a plurality of resistance valve plates connected in series, and the valve plate resistance member and the spark gap member are fixedly connected by a screw.

In a preferred embodiment of the present invention, the first annular electrode includes a plurality of first electrode pillars arranged in an annular array with respect to a central axis of the second spacer, and the annular metal plate includes second electrode pillars arranged to cooperate with the first electrode pillars to form a second auxiliary spark gap.

As a preferable scheme of the present invention, the second spacer is further provided with a fixing assembly for fixing the second spacer, the fixing assembly includes a fixing groove formed in the arrester housing and a power rod rotatably connected to the second spacer through a rotating shaft, the power rod is connected to a fixing rod engaged with the fixing groove through a connecting rod, and the first ring electrode is provided with a push rod for pushing the power rod to move.

As a preferable scheme of the present invention, a torsion spring is disposed on the rotating shaft.

As a preferred scheme of the invention, a ceramic spacer is arranged between each layer of the magnetic attraction coil.

As a preferable scheme of the present invention, the first metal electrode, the second metal electrode, the third metal electrode, the first electrode column, and the second electrode column are all provided with a tapered contact.

As a preferable aspect of the present invention, a rubber gasket for cushioning the second spacer is further provided in the arrester housing.

In a preferred embodiment of the present invention, the first arc extinguishing member and the second arc extinguishing member have the same structure.

According to the technical scheme, the embodiment of the invention has the following advantages:

when the arc extinguishing device is used, the magnetic coil can generate a magnetic field, the third spacer can move by matching with the annular metal sheet, and further the distance between the electrodes on the first arc extinguishing member and the second arc extinguishing member can be respectively lengthened, so that the aim of arc extinguishing is fulfilled.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a partial schematic structural view of a spark gap member according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a second separator according to an embodiment of the present invention;

FIG. 4 is a perspective view of a first electrode column in an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of the structure at A in FIG. 1;

fig. 6 is an enlarged view of a portion a of fig. 2.

In the figure:

1-a lightning arrester housing; 2-a spark gap member; 3-a valve plate resistance member; 4-a first arc extinguishing member; 5-a second arc extinguishing member; 6-resistance valve plate; 7-a fixation assembly; 8-permanent magnet blocks;

401-a first spacer; 402-a second spacer; 403-first voltage equalizing resistance; 404-a third spacer; 405-a first metal electrode; 406-a magnetically attracted coil; 407-a second voltage-sharing resistor; 408-a first ring electrode; 409-a second metal electrode; 410-a third metal electrode; 411-annular metal sheet; 412-a first electrode column; 413-a second electrode column;

701-fixing groove; 702-a rotating shaft; 703-a power rod; 704-a fixation bar; 705 — push rod.

Detailed Description

The embodiment of the invention discloses a lightning arrester of a distribution line, which achieves the aim of arc extinction by utilizing an electromagnetic field to elongate the distance between electrodes and matching with a permanent magnet, and can solve the problem that the magnetic blow valve type lightning arrester in the prior art is easily influenced by the external environment to continuously generate breakdown electric arcs in long-time use.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the invention provides a lightning arrester of a power distribution line, which includes a lightning arrester housing 1, a spark gap member 2 connected with the power distribution line and a valve plate resistance member 3 disposed below the spark gap member 2 and used for connecting the spark gap member 2 with the ground are mounted in the lightning arrester housing 1, the valve plate resistance member 3 includes a plurality of resistance valve plates 6 connected in series, and the valve plate resistance member 3 is fixedly connected with the spark gap member 2 by screws, the resistance valve plate 6 is preferably a zinc oxide valve plate, and can be in an open circuit state at a specified voltage and be in a short circuit state at a voltage exceeding a threshold value, so that overvoltage current generated by lightning strike can be guided to the ground to protect the power distribution line, and the valve plate resistance member 3 and the spark gap member 2 can be removed, so that when damaged, after the damaged part is replaced, normal use can be realized, and the later maintenance cost can be effectively reduced.

The valve plate resistance member 3 comprises a first arc extinguishing member 4 and a second arc extinguishing member 5 which are oppositely arranged and used for lengthening an electric arc to form a main spark gap, a permanent magnet 8 arranged between the first arc extinguishing member 4 and the second arc extinguishing member 5 is arranged on the lightning arrester shell, the first arc extinguishing member 4 is electrically connected with a distribution line, the second arc extinguishing member 5 is electrically connected with the valve plate resistance member 3, the first arc extinguishing member 4 and the second arc extinguishing member 5 have the same structure, at least one first arc extinguishing member 4 and at least one second arc extinguishing member 5 are arranged, the first arc extinguishing member 4 and the second arc extinguishing member 5 can form a larger main arc extinguishing gap, the problem that the arc cannot be extinguished through lengthening the distance between the electrodes when one arc extinguishing member has a problem can be avoided, and after the distance between the electrodes is lengthened, its electric arc that punctures also can be elongated, and the permanent magnetism piece 8 of further cooperation setting can make the electric arc after being elongated lengthen once more, realizes more stable arc extinguishing, and after extinguishing the electric arc through lengthening the electrode, has sufficient safe distance between its electrode, can avoid when there is remaining electric arc to exist, can lead to the problem that main spark gap is punctured continuously, more practicality.

As shown in fig. 1 to 5, the first arc extinguishing member 4 includes a first spacer 401, a second spacer 402, a first equalizing resistor 403 having a ring structure, and a third spacer 404 disposed on the arrester housing 1 by spring connection, and since the high-voltage arrester disposed on the distribution line has a stray capacitance to ground, the voltage distribution of the arrester is not uniform, and damage is likely to occur at a place where the voltage is high, the stray capacitance to ground is equalized by the first equalizing resistor 403, so that the voltage distribution is uniform, and damage is not caused by partial breakdown.

A first metal electrode 405 penetrating the first spacer 401 is disposed at a central position of the first spacer 401, the second spacer 402 is provided with a magnetic coil 406 for generating a magnetic field, a second voltage-sharing resistor 407 centrally disposed below the second spacer 402, and a first ring electrode 408 disposed on the second voltage-sharing resistor 407, a second metal electrode 409 for forming a first auxiliary spark gap in cooperation with the first metal electrode 405 is further provided at a central position above the second separator 402, the two ends of the magnetic coil 406 are respectively connected with the second metal electrode 409 and the first annular electrode 408, the action of the second equalizing resistor 407 on the first equalizing resistor 403 is the same, and the formed first auxiliary spark gap is used for assisting the main spark gap to separate the connection between the earth and the power frequency current after relieving the overvoltage current, so that the normal operation of the distribution line is ensured.

In addition, a ceramic spacer is arranged between every two layers of the magnetic coils 406, the magnetic coils are of a spiral structure, the magnetic coils 406 can conduct current under the action of magnetic fields, the problem of breakdown can be caused when the current is conducted, and the ceramic spacer is made of insulating materials, so that the problem that the magnetic fields cannot be generated due to the breakdown phenomenon can be avoided.

The first voltage equalizing resistor 403 is disposed between the first spacer 401 and the second spacer 402, and two ends of the first voltage equalizing resistor 403 are electrically connected to the first metal electrode 405 and the second metal electrode 409 respectively.

A third metal electrode 410 is arranged at the center above the third spacer 404, two ends of the second grading resistor 407 are electrically connected with the first annular electrode 408 and the third metal electrode 410, respectively, the third spacer 404 is further connected with an annular metal sheet 411 for cooperating with the magnetic attraction coil 406 to drive the third spacer 404 to work, a plurality of first electrode columns 412 on the first annular electrode 408 are annularly arrayed about the central axis of the second spacer 402, a second electrode column 413 for cooperating with the first electrode columns 412 to form a second auxiliary spark gap is arranged on the annular metal sheet 411, when an overvoltage current passes through the magnetic attraction coil 406, a magnetic field is generated by utilizing the principle of electromagnetic induction, the third spacer 404 is forced to move towards one side close to the second spacer 402 under the action of the magnetic field, so as to elongate the distance between the third metal electrode 410 on the first arc extinguishing member 4 and the third metal electrode 410 on the second arc extinguishing member 5, can be when reaching the arc extinguishing purpose, still can provide sufficient dissipation time for the electric arc that the residue exists between it, can effectually avoid can continuously appearing the problem of puncturing electric arc under distribution lines ordinary pressure state.

The second auxiliary spark gap formed by the first electrode column 412 and the second electrode column 413 has the same function as the first auxiliary spark gap, because of the mechanical structure in the device, there is a certain reaction time, and because the overvoltage current of the lightning stroke is a moment, when the overvoltage current is led into the ground, the distance between the second auxiliary spark gap and the upper electrode of the main spark gap will not produce a large toggle, so that a stable spark gap can be provided to protect the distribution line from being damaged, the breakdown arc generated by the lightning stroke will be first elongated and extinguished by the permanent magnet 8, when the overvoltage current does not act, the current will generate a continuous magnetic field by the magnetic attraction coil 406 to provide sufficient reaction time for the movement of the third spacer 404, so that the forced elongation of the distance between the electrodes of the main spark gap can be realized to achieve the purpose of arc extinction, the power transmission line protection device can provide a layer of mandatory protection for the power transmission line in use, and the safety is higher.

The first, second and third spacers 401, 402, 404 are preferably made of ceramic material, and the overall working flow of the arrester when in use is as follows: first supplementary spark gap is punctured under the clearance of superhigh pressure, later puncture second supplementary spark gap after through magnetism coil 406, conduct the electric current to third metal electrode 410 on, then puncture main spark gap with electric current direction second arc extinguishing component 5, after second arc extinguishing component 5, finally can lead the electric current to the ground through valve block subassembly 3, the realization is with the produced overvoltage current of thunderbolt direction ground, then the arc extinguishing is carried out to the breakdown electric arc that produces behind the direction ground, the whole lightning protection work is then accomplished to the end of the arc extinguishing.

As shown in fig. 1, 2 and 6, the second spacer 402 is further provided with a fixing assembly 7 for fixing the second spacer 402, the fixing assembly 7 includes a fixing groove 701 formed in the arrester housing 1 and a power rod 703 rotatably connected to the second spacer 402 through a rotating shaft 702, the power rod 703 is a V-shaped structure, the rotating shaft 702 is provided with a torsion spring, the torsion spring provides an automatic reset function for the power rod 703, the power rod 703 is connected to a fixing rod 704 engaged with the fixing groove 701 through a connecting rod, the first ring electrode 408 is provided with a push rod 705 for pushing the power rod 703 to move, the fixing assembly 7 can ensure that the arrester is installed at high altitude, the problem that the third spacer 404 moves due to the influence of strong wind can be avoided, and the flow of the current during operation is that the current passes through the magnetic attraction coil 406 to generate a magnetic field, the generated magnetic field firstly absorbs the movement of the annular metal sheet 411, the movement of the annular metal sheet 411 drives the movement of the push rod 705, the push rod 705 drives the movement of the power rod 703, the movement of the power rod 703 can drive the movement of the fixed rod 704 through the connecting rod, the fixed rod 704 is separated from the embedding with the fixed groove 701, the annular metal sheet 411 cannot drive the movement of the third spacer 404 at the moment, the movement of the third spacer 404 is not driven until the fixed rod 704 is completely separated from the embedding with the fixed groove 701, and therefore the purpose of prolonging the electrodes to extinguish the arc is achieved.

In addition, still be provided with the rubber gasket that is used for buffering to second spacer 402 in the arrester shell 1, can avoid magnetism to inhale coil 406 and produce stronger magnetic field and lead to third spacer 404 to move too fast and direct striking, can cause the problem that third spacer 404 damaged, in addition in order to avoid can producing higher temperature at this arrester during operation, consequently can be according to actual conditions with the rubber gasket change for the spring, realize the buffering to third spacer 404 through the spring.

The first metal electrode 405, the second metal electrode 409, the third metal electrode 410, the first electrode column 412 and the second electrode column 413 are all provided with the connecting leads of the conical structures, and the connecting leads of the conical structures are beneficial to connecting breakdown electric arcs and avoid the problem that the breakdown electric arcs can move to damage other internal components.

While the distribution line lightning arrester according to the present invention has been described in detail, those skilled in the art will appreciate that the present invention is not limited to the above-described embodiments, but can be modified in various ways.