WO2015070517A1 - Multi-gap self-inflating strong-airflow protective device for lightning protection by longitudinal-blast arc extinguishing - Google Patents
Multi-gap self-inflating strong-airflow protective device for lightning protection by longitudinal-blast arc extinguishing Download PDFInfo
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- WO2015070517A1 WO2015070517A1 PCT/CN2014/000955 CN2014000955W WO2015070517A1 WO 2015070517 A1 WO2015070517 A1 WO 2015070517A1 CN 2014000955 W CN2014000955 W CN 2014000955W WO 2015070517 A1 WO2015070517 A1 WO 2015070517A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T19/00—Devices providing for corona discharge
- H01T19/04—Devices providing for corona discharge having pointed electrodes
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- the invention relates to a lightning protection gap device for a transmission line, and particularly relates to a multi-gap self-expansion strong airflow vertical blowout arc-proof lightning protection device capable of extending an arc path, weakening an arc, and adopting a multi-point longitudinal blowing and arc extinguishing mode.
- Lightning protection of transmission lines has always been an important part of lightning protection work in the power sector. Lightning failure is still one of the important factors affecting the safety of power grids. Lightning strikes on the transmission line cause the line insulator to flash, and the subsequent power frequency continuous flow damages the insulator string and the hardware, causing the insulator string to burn and the wire to be broken.
- the traditional "blocking" lightning protection method, the modification of the tower grounding resistance, the installation of the grounding line and the lightning protection line, the installation of the line arrester, etc. due to its limitations, can only solve 50% of lightning strikes.
- the power sector has adopted parallel protection gaps on transmission lines to prevent lightning strikes. However, in actual operation, the parallel protection gap has obvious defects as follows:
- the parallel protection gap is installed at both ends of the insulator string, which is a function of shortening the creepage distance of the insulator string to preferentially break the insulator string during lightning strike.
- the creepage distance of the insulator string is shorted, which not only causes the overall lightning resistance level of the power transmission line to decrease, but also increases the lightning strike rate.
- the power frequency insulation level of the power system is reduced during normal operation, and the parallel protection gap is temporarily increased. The probability of false breakdown under voltage and operating overvoltage.
- the parallel protection gap is preferentially broken due to the overvoltage caused by the lightning strike, and the lightning current is discharged into the earth, thereby protecting the transmission line and the electrical equipment.
- the parallel protection gap has no arc extinguishing capability, the power frequency freewheeling caused by the insulator string flashover cannot be extinguished, and the arc burns for a long time between the protection gaps, which will cause damage to the insulator string. In severe cases, the transmission line may be disconnected. At the same time, the arc will cause ablation of the electrode and reduce its protective performance.
- the arc lightning protection gap device is installed in parallel on both ends of the line insulator string, and the flashover voltage between the protection gaps is smaller than the protected insulator string, so that the breakdown of the protected insulator string occurs when the transmission line is struck by lightning, and the breakdown discharge
- the signal acquisition device automatically senses the lightning current signal and triggers the high-speed injection gas generating device, the high-speed jet airflow is instantaneously generated, and the free-wheeling arc in the confined space is strongly impacted in the longitudinal direction and cooled to extinction.
- a confined space jet airflow arc-extinguishing lightning protection gap device for each voltage level transmission line is disclosed.
- the device is installed in parallel at both ends of the line insulator string, and the flashover voltage between the protection gaps is less than that protected.
- Insulator string which is preferentially broken down by the protected insulator string when the transmission line is struck by lightning.
- the signal acquisition device automatically collects the signal and activates the injection gas generating device to instantaneously generate a high-speed airflow that impacts the arc in the longitudinal direction and cools to extinguish.
- Chinese Patent No. 2010105694082 discloses a multi-gap self-expansion strong airflow arc extinguishing lightning protection device for each voltage level transmission line.
- the device is installed in parallel on one side of the line insulator string, and the insulation strength of the main discharge protection gap and the auxiliary discharge gap is smaller than the protected insulator string, so that the overvoltage generated when the line strikes lightning preferentially breaks through the protection gap.
- a high-temperature arc is generated inside the auxiliary discharge gap, the air is heated and expanded rapidly in the semi-closed space of the auxiliary discharge gap, the arc is elongated and the arc is ejected along the air guide hole; and the signal acquisition device automatically collects signals and starts
- the gas generating device instantaneously generates a high-speed airflow to extinguish the arc.
- the object of the present invention is to provide an overhead transmission line suitable for various voltage levels, which can successfully extinguish the power frequency freewheeling arc caused by lightning discharge without reducing the multi-gap self-expansion strong airflow of the power system power frequency insulation level.
- Vertical blowout arc protection device The device can lengthen the arc path, weaken the arc, and adopt a multi-point longitudinal blowing and arc-extinguishing method to greatly increase the arc break point length and greatly reduce the arc re-ignition rate.
- a multi-gap self-expanding strong airflow vertical blowout arc-breaking lightning protection device comprises a longitudinal blow-extinguishing device, a ground-side electrode and a wire-side electrode fixedly mounted on the grounding end of the insulator string by a ground-side connecting fitting; the grounding The side electrode is mounted on the longitudinal blow-extinguishing device; one end of the wire-side electrode is mounted on the overhead wire by a clamp, and the other end is directed to the ground-side electrode; the protective gap and the insulator formed by the ground-side electrode and the wire-side electrode
- the longitudinal blowing and arc extinguishing device comprises a main body of the arc extinguishing device and the arc extinguishing tube; the main body of the arc extinguishing device is provided with a plurality of through holes; and the arc extinguishing tube is placed in the main body of the arc extinguishing device The angle formed between the two sides of the through hole in the through hole and
- the shape of the arc extinguishing tube is set to a spiral shape, and the arc path is changed from a straight line to a spiral three-dimensional ring, and the arc is elongated several times with a sudden change.
- Turning makes the arc fragile, easy to be extinguished and not re-ignitable.
- the multi-point longitudinal blowing and arc-extinguishing mode is adopted, and the arc-baked multi-product gas material is used to generate a strong airflow to cut the arc in the longitudinal direction at multiple places.
- the multi-point longitudinal blowing greatly increases the length of the arc breakpoint and greatly reduces the re-ignition rate of the arc.
- the effective arc-extinguishing performance is greatly improved compared with the multi-point cross-blow.
- the invention utilizes the "skin" effect characteristic of high frequency of lightning current, introduces lightning current into the spiral arc extinguishing tube on the surface of the main body of the arc extinguishing device, and forms N squares between the inner electrodes of the N arc extinguishing tubes connected in series and the electrodes inside the adjacent tubes.
- the arc segment is arc extinguished by generating a strong longitudinal airflow through the air in the heating tube.
- the spirally arranged arc extinguishing tube is separated by an insulating skirt.
- the above-mentioned arc extinguishing tube is mainly composed of a small copper tube disposed at both ends, a metal ball disposed at an intermediate position, and an outer wall ceramic tube; the grounded side electrode passes through the wire and the arc extinguishing device body
- the small copper tube at the first end of the first arc extinguishing tube is connected, and the small copper tube at the end is vertically misaligned with the small copper tube at the head end of the second arc extinguishing tube, and the spiral is connected by the spiral, and the arc passes through each path.
- the arc passes through the arc extinguishing tube, it breaks through the small copper tube and the metal ball, and heats the air inside the tube.
- the elongated fragile arc is blown out from the small copper tube hole at both ends of each arc extinguishing tube at a high speed.
- the metal ball is arranged in the arc extinguishing tube, which can function as a center electrode to better guide the arc to pass through the arc extinguishing tube.
- the structure of the arc extinguishing tube is in accordance with the characteristics of the lightning current high frequency skin, and the lightning current is easily drilled into the arc extinguishing tube.
- the arc thin line effect is used to suppress the arc intensity, so that the arc is easily extinguished;
- the constrained space is used to force the arc to be thinned, and the cross section of the arc is actively reduced, thereby reducing the ability of the arc to deliver energy and causing the arc to pass through radiation, conduction, and in the open space.
- the energy consumed by convection cannot be supplemented in equal amount, and the arc is in an extremely easy-extinguishing state; at the same time, the confinement channel is narrow, and the thermal expansion at the time of small arc generates high pressure to extinguish the arc in the early stage of the transient arc, and the arc-extinguishing threshold is greatly reduced.
- the shape of the arc extinguishing device body described above is cylindrical or L-shaped.
- the longitudinal blow-extinguishing device described above further includes an arcing disk, and the ground-side electrode is mounted on the main body of the arc extinguishing device of the longitudinal blowing and extinguishing device through the arcing disk.
- the arcing disk is made of a conductive material or is covered with a conductive material such as copper, aluminum or the like.
- the ground-side electrode and/or the lead-side electrode described above employ a cold cathode type electrode such as a graphite electrode or an electrode made of a material such as copper or aluminum.
- a cold cathode type electrode such as a graphite electrode or an electrode made of a material such as copper or aluminum.
- Arc-breaking effect by cold cathode effect the electrode is a low temperature body, the arc is a high temperature body; the arc temperature is affected by the cold cathode within a certain range of contact between the two is also a low temperature arc, and the arc is divided into cold arcs by a plurality of electrodes to make the arc
- the reduction in thermal ionization is easy to extinguish.
- the multi-point vertical blowing and arc extinguishing mode is realized, which has better arc extinguishing effect than the traditional horizontal blowing and arc extinguishing method:
- the horizontal blowing uses the length of the arc extinguishing device to pull The long arc, thus requiring a long arc extinguishing device, and the arc is continuously elongated, without arcing abrupt turns, and the arc is weakened to a low degree.
- the longitudinal blowing controls the arc-extinguishing response time through the inner diameter and length of the ceramic tube, and the transverse blowing cannot control the response time.
- the longitudinal blowing can be controlled by a ceramic tube fixed on the surface of the arc extinguishing rod, and the arc resistance is excellent, and the arc can be repeatedly ablated by the arc several thousand times.
- the longitudinal blowing unit has a long interval, the cold cathode effect is weak, the arc temperature is high at a small current, the gas output is large, the arc extinguishing threshold current is small, and the arc extinguishing sensitivity is high.
- the arc can be extinguished at a small value.
- the horizontal blowing unit has a small cold cathode effect, and the arc has a large value to generate the arc extinguishing air flow.
- the arc extinguishing threshold has a large current and the arc extinguishing is difficult.
- the longitudinal blowing interval is large, the arc extinguishing rate is high (the arc temperature is high, the arc extinguishing airflow is strong), and the re-ignition rate is extremely low (the arc is suddenly bent at the same time and the arc is extinguished at the same time).
- Longitudinal blowing requires a very long geometric length due to the small arc-break interval of the unit to avoid re-ignition.
- the strength and arc resistance of ceramic materials are higher than that of silica gel, and the threshold of longitudinal blowout is much larger than that of cross blow.
- the horizontal blowing and arc extinguishing device has high cost and low arc extinguishing rate, and the vertical blowing and arc extinguishing device is simpler in production and installation, and the cost is low.
- the arc extinguishing tube is small and can generate a strong arc extinguishing air flow at a very small current (mA level).
- the arc extinguishing action threshold is extremely low, which is conducive to the deep suppression of the transient arc.
- Using a cold cathode as the electrode can reduce the arc temperature and is advantageous for extinguishing the steady arc.
- the invention has the advantages of simple structure, low production cost, stable work, safety and reliability, good arc extinguishing effect, effectively reducing the lightning trip rate and accident rate of the power transmission line of the power system, and improving the stability of the power system.
- FIG. 1 is a schematic view showing the structure of an embodiment of the present invention.
- FIG. 2 is a schematic view showing the structure of a longitudinal blowout arc extinguishing device of the present invention.
- Figure 3 is a schematic view showing the structure of an arc extinguishing tube in the present invention.
- Figure 4 is a schematic view showing the structure of another embodiment of the present invention.
- 1-insulator string 2-ground side connection fitting, 3-extinguishing unit body, 4-lead disc, 5-ground side electrode, 6-wire side electrode, 7-through hole, 8-extinguised tube, 9- Small copper tube, 10-metal ball, 11-outer wall ceramic tube.
- a multi-gap self-expanding and strong airflow longitudinal blowout arc-breaking lightning protection device comprises a longitudinal blow-extinguishing arc fixedly mounted on the grounding end of the insulator string 1 through a ground-side connecting fitting 2 Device, ground side electrode 5 and wire side
- the electrode 6 is mounted on the longitudinal blow-extinguishing device; one end of the wire-side electrode 6 is mounted on the overhead wire by a clamp, and the other end is directed to the ground-side electrode 5; the ground-side electrode 5, the protective gap formed with the wire side electrode 6 is juxtaposed with the insulator string 1;
- the vertical blowout arc extinguishing device comprises the arc extinguishing device body 3 and the arc extinguishing tube 8; the arc extinguishing device body 3 is provided with a plurality of a through hole 7; the arc extinguishing tube 8 is placed in the through hole 7 of the arc exting
- the arc extinguishing tube 8 is mainly composed of a small copper tube 9 disposed at both ends, a metal ball 10 disposed at an intermediate position, and an outer wall ceramic tube 11; the grounding side electrode 5 passes through the wire and the body of the arc extinguishing device a small copper tube at the head end of an arc extinguishing tube is connected, and a small copper tube at the end is vertically misaligned with a small copper tube at the head end of the second arc extinguishing tube, and is spirally connected, and the arc passes through each arc extinguishing tube in this path.
- the arc When the arc passes through the arc extinguishing tube, it breaks through the small copper tube and the metal ball, heats the air inside the tube, and after the air expands, the elongated fragile arc is blown out from the small copper tube hole at both ends of each arc extinguishing tube at a high speed.
- the longitudinal blow-extinguishing device further includes an arcing disk 4, and the ground-side electrode 5 is mounted on the arc extinguishing device main body 3 of the longitudinal blowing and extinguishing device through the arcing disk 4.
- the shape of the arc extinguishing device body 3 is cylindrical, that is, a cylindrical cylinder.
- the difference between the present embodiment and the first embodiment is that the shape of the arc extinguishing device main body 3 is L-shaped, that is, an L-shaped cylinder.
- the above embodiments 1 and 2 have simple structure, stable operation, safety and reliability; and the shape of the arc extinguishing tube is set to a spiral shape by using the volume of the main body of the arc extinguishing device, so that the arc path is changed from a straight line to a spiral three-dimensional ring shape.
- the arc is stretched several times and has abrupt turns, which increases the fragility of the arc, is easily extinguished and is not re-ignitable.
- the multi-point longitudinal blowing and arc-extinguishing mode is adopted, and the arc-baked multi-product gas material is used to generate a strong airflow to cut the arc in the longitudinal direction at multiple places.
- the multi-point longitudinal blowing greatly increases the length of the arc breakpoint and greatly reduces the re-ignition rate of the arc.
- the effective arc-extinguishing performance is greatly improved compared with the multi-point cross-blow.
Abstract
A multi-gap self-inflating strong-airflow protective device for lightning protection by longitudinal-blast arc extinguishing. The device comprises a longitudinal-blast arc extinguishing device installed on a grounding terminal of an insulator string (1) via a grounding-side link fitting (2), a grounding-side electrode (5) installed on the longitudinal-blast arc extinguishing device, and a conductor-side electrode (6) installed on an overhead conductor, wherein a protective gap formed by the grounding-side electrode (5) and the conductor-side electrode (6) is parallel to the insulator string (1). The longitudinal-blast arc extinguishing device comprises an arc extinguishing device main body (3) and arc extinguishing tubes (8), wherein the arc extinguishing device main body (3) is provided with several through holes for placing the arc extinguishing tubes, and the angle formed between pairwise arc extinguishing tubes which have ends in contact with each other and are placed in the arc extinguishing device main body is 90°. The arc extinguishing tubes (8) are spirals. The grounding-side electrode (5) is connected to the first arc extinguishing tube via a conductor, and the grounding-side link fitting (2) is connected to the last arc extinguishing tube via a conductor. The device has a simple structure, low manufacturing cost, security and reliability, effectively reduces the lightning tripping rate and accident rate of a power transmission line of an electric power system, and improves the stability of the electric power system.
Description
本发明涉及了输电线路防雷保护间隙装置，具体涉及了一种可拉长电弧路径、弱化电弧、采用多点纵吹灭弧方式的多间隙自膨胀强气流纵吹灭弧防雷保护装置。The invention relates to a lightning protection gap device for a transmission line, and particularly relates to a multi-gap self-expansion strong airflow vertical blowout arc-proof lightning protection device capable of extending an arc path, weakening an arc, and adopting a multi-point longitudinal blowing and arc extinguishing mode.
输电线路防雷一直都是电力部门防雷工作的重要内容，雷电故障仍然是影响电网安全的重要因素之一。输电线路发生雷击，导致线路绝缘子闪络，随之而起的工频续流损坏绝缘子串及金具，导致绝缘子串烧毁及烧断导线事故。传统的“堵塞型”防雷保护方式，改造杆塔接地电阻、架设耦合地线及避雷线、安装线路避雷器等，由于其局限性，只能解决50％的雷击事故。近年，为了进一步提高输电线路供电的可靠性，电力部门采用在输电线路加装并联保护间隙来防止雷击事故。然而实际运行中，并联保护间隙具有明显的缺陷如下：Lightning protection of transmission lines has always been an important part of lightning protection work in the power sector. Lightning failure is still one of the important factors affecting the safety of power grids. Lightning strikes on the transmission line cause the line insulator to flash, and the subsequent power frequency continuous flow damages the insulator string and the hardware, causing the insulator string to burn and the wire to be broken. The traditional "blocking" lightning protection method, the modification of the tower grounding resistance, the installation of the grounding line and the lightning protection line, the installation of the line arrester, etc., due to its limitations, can only solve 50% of lightning strikes. In recent years, in order to further improve the reliability of power transmission lines, the power sector has adopted parallel protection gaps on transmission lines to prevent lightning strikes. However, in actual operation, the parallel protection gap has obvious defects as follows:
首先，并联保护间隙安装在绝缘子串两端，是通过缩短绝缘子串爬电距离的方法起到雷击时优先绝缘子串击穿的作用。绝缘子串爬电距离被短接，不仅导致电力系统输电线路整体耐雷水平下降使雷击跳闸率增加，同时导致电力系统正常运行时的工频绝缘水平下降，无形之间提高了并联保护间隙在暂时过电压及操作过电压下误击穿概率。Firstly, the parallel protection gap is installed at both ends of the insulator string, which is a function of shortening the creepage distance of the insulator string to preferentially break the insulator string during lightning strike. The creepage distance of the insulator string is shorted, which not only causes the overall lightning resistance level of the power transmission line to decrease, but also increases the lightning strike rate. At the same time, the power frequency insulation level of the power system is reduced during normal operation, and the parallel protection gap is temporarily increased. The probability of false breakdown under voltage and operating overvoltage.
其次，当输电线路发生雷击时，并联保护间隙优先因雷击引起的过电压而击穿，将雷电流泄入大地，从而起到保护输电线路及电气设备的作用。然而由于并联保护间隙没有灭弧能力，不能熄灭绝缘子串闪络后引起的工频续流，电弧在保护间隙间长时间灼烧，将造成绝缘子串损坏，严重时，可能造成输电线路断线，同时电弧会对电极造成烧蚀而降低其保护性能。最终依靠断路器来熄灭电弧来实现保护输电线路及设备，是牺牲“跳闸率”和“供电可靠性”换取“低事故率”的做法。Secondly, when a lightning strike occurs on the transmission line, the parallel protection gap is preferentially broken due to the overvoltage caused by the lightning strike, and the lightning current is discharged into the earth, thereby protecting the transmission line and the electrical equipment. However, since the parallel protection gap has no arc extinguishing capability, the power frequency freewheeling caused by the insulator string flashover cannot be extinguished, and the arc burns for a long time between the protection gaps, which will cause damage to the insulator string. In severe cases, the transmission line may be disconnected. At the same time, the arc will cause ablation of the electrode and reduce its protective performance. Ultimately, relying on circuit breakers to extinguish the arc to protect the transmission lines and equipment is a sacrifice of "tripping rate" and "power supply reliability" in exchange for "low accident rate".
针对普通并联间隙不具备灭弧能力的缺陷，发明人在之前申请的专利，中国专利号为2011201046273就公开了一种适用于10～35kV架空输电线路的10～35kV架空输电线路约束空间喷射气体灭弧防雷间隙装置，该装置并联安装于线路绝缘子串两端，保护间隙之间的闪络电压小于被保护绝缘子串，从而在输电线路遭受雷击时优先于被保护绝缘子串击穿，击穿放电时，信号采集装置自动感应雷电流信号并触发高速喷射气体发生装置，瞬间产生高速喷射气流对约束空间内续流电弧沿纵向强烈冲击、冷却至熄灭。又如中国专利号为2011200053246公开了用于各电压等级输电线路的约束空间喷射气流灭弧防雷间隙装置，该装置并联安装于线路绝缘子串两端，保护间隙之间的闪络电压小于被保护绝缘子串，从而在输电线路遭受雷击时优先于被保护绝缘子串击穿，击穿放电时，约束空间内部的产气材料被
高温电弧急剧加热产生高压气体的同时，信号采集装置自动采集信号并启动喷射气体发生装置，瞬间产生高速气流沿纵向对电弧造成冲击、冷却至熄灭。中国专利号为2010105694082公开了一种用于各电压等级输电线路的多间隙自膨胀强气流灭弧防雷保护装置。该装置并联安装于线路绝缘子串一侧，主放电保护间隙和辅助放电间隙的绝缘强度小于被保护的绝缘子串，从而在线路发生雷击时产生的过电压优先击穿保护间隙。保护间隙击穿放电时，在辅助放电间隙内部产生高温电弧，空气在辅助放电间隙半封闭的空间急剧加热膨胀，拉长电弧并将电弧沿导气孔喷出；同时信号采集装置自动采集信号并启动气体发生装置，瞬间产生高速气流熄灭电弧。发明人之前申请的专利对于熄灭工频电弧起到了很好的作用，但是仍然存在电弧路径短、重燃几率比较大等等一些不足。因此，上述的装置还需要进行进一步的改进，从而达到更好的效果，提高电力系统的稳定性。In view of the defect that the ordinary parallel gap does not have the ability of arc extinguishing, the inventor has previously applied for a patent, and the Chinese patent number 2011201046273 discloses a 10 to 35kV overhead transmission line for space-conducting gas transmission lines for 10~35kV overhead transmission lines. The arc lightning protection gap device is installed in parallel on both ends of the line insulator string, and the flashover voltage between the protection gaps is smaller than the protected insulator string, so that the breakdown of the protected insulator string occurs when the transmission line is struck by lightning, and the breakdown discharge When the signal acquisition device automatically senses the lightning current signal and triggers the high-speed injection gas generating device, the high-speed jet airflow is instantaneously generated, and the free-wheeling arc in the confined space is strongly impacted in the longitudinal direction and cooled to extinction. In addition, as disclosed in Chinese Patent No. 2011200053246, a confined space jet airflow arc-extinguishing lightning protection gap device for each voltage level transmission line is disclosed. The device is installed in parallel at both ends of the line insulator string, and the flashover voltage between the protection gaps is less than that protected. Insulator string, which is preferentially broken down by the protected insulator string when the transmission line is struck by lightning. When the discharge is discharged, the gas generating material inside the confined space is
At the same time that the high-temperature arc is heated rapidly to generate high-pressure gas, the signal acquisition device automatically collects the signal and activates the injection gas generating device to instantaneously generate a high-speed airflow that impacts the arc in the longitudinal direction and cools to extinguish. Chinese Patent No. 2010105694082 discloses a multi-gap self-expansion strong airflow arc extinguishing lightning protection device for each voltage level transmission line. The device is installed in parallel on one side of the line insulator string, and the insulation strength of the main discharge protection gap and the auxiliary discharge gap is smaller than the protected insulator string, so that the overvoltage generated when the line strikes lightning preferentially breaks through the protection gap. When the gap breakdown discharge is protected, a high-temperature arc is generated inside the auxiliary discharge gap, the air is heated and expanded rapidly in the semi-closed space of the auxiliary discharge gap, the arc is elongated and the arc is ejected along the air guide hole; and the signal acquisition device automatically collects signals and starts The gas generating device instantaneously generates a high-speed airflow to extinguish the arc. The patents previously filed by the inventors have played a very good role in extinguishing the power frequency arc, but there are still some shortcomings such as short arc path and relatively high reignition probability. Therefore, the above device also needs to be further improved to achieve better effects and improve the stability of the power system.
发明内容Summary of the invention
本发明的目的在于提供了一种适用于各种电压等级的架空输电线路，既能成功熄灭雷击放电引起的工频续流电弧又不减小电力系统工频绝缘水平的多间隙自膨胀强气流纵吹灭弧防雷保护装置。该装置可以拉长电弧路径、弱化电弧、采用多点纵吹灭弧方式使电弧断点长度大幅度快速提高，使电弧重燃率大幅度降低。The object of the present invention is to provide an overhead transmission line suitable for various voltage levels, which can successfully extinguish the power frequency freewheeling arc caused by lightning discharge without reducing the multi-gap self-expansion strong airflow of the power system power frequency insulation level. Vertical blowout arc protection device. The device can lengthen the arc path, weaken the arc, and adopt a multi-point longitudinal blowing and arc-extinguishing method to greatly increase the arc break point length and greatly reduce the arc re-ignition rate.
为了实现上述目的，本发明采用了以下技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
一种多间隙自膨胀强气流纵吹灭弧防雷保护装置，包括通过接地侧连接金具固定安装在绝缘子串接地端上的纵吹灭弧装置、接地侧电极和导线侧电极；所述的接地侧电极安装在纵吹灭弧装置上；所述的导线侧电极的一端通过夹具安装在架空导线上，另一端指向接地侧电极；所述的接地侧电极与导线侧电极形成的保护间隙与绝缘子串相并列；其中，所述的纵吹灭弧装置包括灭弧装置主体和灭弧管；所述的灭弧装置主体设有若干个通孔；所述的灭弧管放置在灭弧装置主体的通孔内，并且端部相互接触的灭弧管两两之间形成的角度为90°；所述在灭弧装置主体上下端部的灭弧管互相错开放置，使灭弧装置主体内的灭弧管呈螺旋回形状排列；所述的接地侧电极通过导线与第一个灭弧管相连接，所述的接地侧连接金具通过导线与最后一个灭弧管相连接。A multi-gap self-expanding strong airflow vertical blowout arc-breaking lightning protection device comprises a longitudinal blow-extinguishing device, a ground-side electrode and a wire-side electrode fixedly mounted on the grounding end of the insulator string by a ground-side connecting fitting; the grounding The side electrode is mounted on the longitudinal blow-extinguishing device; one end of the wire-side electrode is mounted on the overhead wire by a clamp, and the other end is directed to the ground-side electrode; the protective gap and the insulator formed by the ground-side electrode and the wire-side electrode The longitudinal blowing and arc extinguishing device comprises a main body of the arc extinguishing device and the arc extinguishing tube; the main body of the arc extinguishing device is provided with a plurality of through holes; and the arc extinguishing tube is placed in the main body of the arc extinguishing device The angle formed between the two sides of the through hole in the through hole and the end portions are 90°; the arc extinguishing tubes at the upper and lower ends of the main body of the arc extinguishing device are staggered to each other, so that the main body of the arc extinguishing device is The arc extinguishing tube is arranged in a spiral shape; the grounding side electrode is connected to the first arc extinguishing tube through a wire, and the ground side connecting metal fitting is connected to the last arc extinguishing tube through the wire.
在本发明中，利用灭弧装置主体的体积，将灭弧管的摆放形状设置为螺旋回形状，使电弧路径由直线转变为螺旋立体环状，将电弧拉长了数倍，并有突变拐弯，使电弧脆弱性提高，易于被熄灭且不易重燃。采用的多点纵吹灭弧方式，利用电弧烘烤多产气材料产生强气流在多处同时在纵向切断电弧。多点纵吹使电弧断点长度大幅度快速提高，使电弧重燃率大幅度降低；比多点横吹有效灭弧性能大幅度提高。
In the present invention, by using the volume of the main body of the arc extinguishing device, the shape of the arc extinguishing tube is set to a spiral shape, and the arc path is changed from a straight line to a spiral three-dimensional ring, and the arc is elongated several times with a sudden change. Turning makes the arc fragile, easy to be extinguished and not re-ignitable. The multi-point longitudinal blowing and arc-extinguishing mode is adopted, and the arc-baked multi-product gas material is used to generate a strong airflow to cut the arc in the longitudinal direction at multiple places. The multi-point longitudinal blowing greatly increases the length of the arc breakpoint and greatly reduces the re-ignition rate of the arc. The effective arc-extinguishing performance is greatly improved compared with the multi-point cross-blow.
本发明利用雷电流高频的“集肤”效应特点，把雷电流导入处于灭弧装置主体表面的螺旋灭弧管，串联的N个灭弧管内电极与相邻管内电极间的形成N个四方型电弧段，通过加热管内空气产生强烈的纵向气流进行灭弧。螺旋排布的灭弧管间隔用绝缘裙边封隔。The invention utilizes the "skin" effect characteristic of high frequency of lightning current, introduces lightning current into the spiral arc extinguishing tube on the surface of the main body of the arc extinguishing device, and forms N squares between the inner electrodes of the N arc extinguishing tubes connected in series and the electrodes inside the adjacent tubes. The arc segment is arc extinguished by generating a strong longitudinal airflow through the air in the heating tube. The spirally arranged arc extinguishing tube is separated by an insulating skirt.
作为本发明的进一步说明，以上所述的灭弧管主要由设置在两端的小铜管、设置在中间位置的金属球和外壁陶瓷管组成；所述的接地侧电极通过导线与灭弧装置主体内的第一个灭弧管首端的小铜管连接，末端的小铜管与第二个灭弧管首端的小铜管垂直错位连接，以此螺旋连接下去，电弧以此路径通过每个灭弧管，电弧通过灭弧管时，击穿小铜管和金属球，加热管内的空气，空气膨胀后将拉长的脆弱电弧从每个灭弧管两端的小铜管孔纵向高速吹出熄灭。在灭弧管内设置金属球，可以起到中心电极的作用，更好的引导电弧从灭弧管穿过。As a further description of the present invention, the above-mentioned arc extinguishing tube is mainly composed of a small copper tube disposed at both ends, a metal ball disposed at an intermediate position, and an outer wall ceramic tube; the grounded side electrode passes through the wire and the arc extinguishing device body The small copper tube at the first end of the first arc extinguishing tube is connected, and the small copper tube at the end is vertically misaligned with the small copper tube at the head end of the second arc extinguishing tube, and the spiral is connected by the spiral, and the arc passes through each path. When the arc passes through the arc extinguishing tube, it breaks through the small copper tube and the metal ball, and heats the air inside the tube. After the air expands, the elongated fragile arc is blown out from the small copper tube hole at both ends of each arc extinguishing tube at a high speed. The metal ball is arranged in the arc extinguishing tube, which can function as a center electrode to better guide the arc to pass through the arc extinguishing tube.
在本发明中，灭弧管的结构设置符合雷电流高频集肤特点，雷电流极易钻入灭弧管中。利用电弧细线效应抑制电弧强度，使电弧容易被熄灭；利用约束空间迫使电弧细线化，使电弧的截面积极小化，由此降低电弧输送能量能力而使电弧在开放空间通过辐射、传导、对流消耗的能量不能等量补充，电弧处于极易熄灭状态；同时约束通道狭小，小电弧时热膨胀既产生高气压使电弧熄灭于暂态电弧的及早期，使灭弧阈值大幅降低。In the present invention, the structure of the arc extinguishing tube is in accordance with the characteristics of the lightning current high frequency skin, and the lightning current is easily drilled into the arc extinguishing tube. The arc thin line effect is used to suppress the arc intensity, so that the arc is easily extinguished; the constrained space is used to force the arc to be thinned, and the cross section of the arc is actively reduced, thereby reducing the ability of the arc to deliver energy and causing the arc to pass through radiation, conduction, and in the open space. The energy consumed by convection cannot be supplemented in equal amount, and the arc is in an extremely easy-extinguishing state; at the same time, the confinement channel is narrow, and the thermal expansion at the time of small arc generates high pressure to extinguish the arc in the early stage of the transient arc, and the arc-extinguishing threshold is greatly reduced.
作为本发明的进一步说明，以上所述的灭弧装置主体的形状为圆柱状，或呈L形。As a further description of the present invention, the shape of the arc extinguishing device body described above is cylindrical or L-shaped.
作为本发明的进一步改进，以上所述的纵吹灭弧装置还包括引弧盘，所述的接地侧电极穿过引弧盘安装在纵吹灭弧装置的灭弧装置主体上。引弧盘采用导电材料制作或是在其表面覆盖导电材料，如铜、铝等等。As a further improvement of the present invention, the longitudinal blow-extinguishing device described above further includes an arcing disk, and the ground-side electrode is mounted on the main body of the arc extinguishing device of the longitudinal blowing and extinguishing device through the arcing disk. The arcing disk is made of a conductive material or is covered with a conductive material such as copper, aluminum or the like.
作为本发明的进一步说明，以上所述的接地侧电极和/或导线侧电极采用冷阴极型电极，如石墨电极或是铜、铝等材料制成的电极。利用冷阴极效应灭弧：电极是低温体，电弧是高温体；在两者间接触的一定范围内电弧温度受冷阴极影响也是低温电弧，用多个电极把电弧分割成冷电弧，使电弧的热电离度降低易于熄灭。As a further explanation of the present invention, the ground-side electrode and/or the lead-side electrode described above employ a cold cathode type electrode such as a graphite electrode or an electrode made of a material such as copper or aluminum. Arc-breaking effect by cold cathode effect: the electrode is a low temperature body, the arc is a high temperature body; the arc temperature is affected by the cold cathode within a certain range of contact between the two is also a low temperature arc, and the arc is divided into cold arcs by a plurality of electrodes to make the arc The reduction in thermal ionization is easy to extinguish.
本发明的优点：Advantages of the invention:
1.通过灭弧装置的结构设计，实现了多点纵吹灭弧方式，比传统的横吹灭弧方式具有更好的灭弧效果：1. Through the structural design of the arc extinguishing device, the multi-point vertical blowing and arc extinguishing mode is realized, which has better arc extinguishing effect than the traditional horizontal blowing and arc extinguishing method:
(1)利用灭弧装置主体的体积，把电弧由直线转变为螺旋立体环状，电弧拉长10倍，电弧有突变拐弯，使电弧脆弱性提高，易于被熄灭；横吹利用灭弧装置长度拉长电弧，由此需要很长的灭弧装置，且电弧连续拉长，没有电弧突变拐弯，电弧被弱化度低。纵吹通过陶瓷管内径及长度控制灭弧响应时间，横吹无法控制响应时间。纵吹可以采用固定在灭弧棒表面的陶瓷管实现控制电弧形态，耐电弧性能优异，可以重复被电弧烧蚀几千次。
(1) Using the volume of the main body of the arc extinguishing device, the arc is converted from a straight line to a spiral three-dimensional ring, the arc is stretched 10 times, the arc has abrupt turns, the arc fragility is improved, and it is easy to be extinguished; the horizontal blowing uses the length of the arc extinguishing device to pull The long arc, thus requiring a long arc extinguishing device, and the arc is continuously elongated, without arcing abrupt turns, and the arc is weakened to a low degree. The longitudinal blowing controls the arc-extinguishing response time through the inner diameter and length of the ceramic tube, and the transverse blowing cannot control the response time. The longitudinal blowing can be controlled by a ceramic tube fixed on the surface of the arc extinguishing rod, and the arc resistance is excellent, and the arc can be repeatedly ablated by the arc several thousand times.
(2)横吹灭弧装置由于要固定在绝缘子串边沿，只能用硅胶，耐受电弧烧蚀性能差。一般仅能烧蚀5次。(2) Because the horizontal blower and arc extinguishing device is to be fixed on the edge of the insulator string, only silica gel can be used, and the arc ablation performance is poor. Generally only ablation can be performed 5 times.
(3)纵吹的电弧断口长度大且断口在电弧的突变点，不易重燃。同时，电弧拉长效率高在较短灭弧装置(灭弧棒)即把电弧拉长很多。横吹条件下电弧拉长路径及长度必须靠灭弧棒引导，因此灭弧棒很长，否则容易重燃。在工程上不可行。(3) The length of the arc break of the longitudinal blow is large and the fracture is at a sudden point of the arc, and it is not easy to reignite. At the same time, the arc elongation efficiency is high. In the shorter arc extinguishing device (arc bar), the arc is elongated a lot. Under the horizontal blowing condition, the arc lengthening path and length must be guided by the arc extinguishing rod, so the arc extinguishing rod is very long, otherwise it is easy to reignite. Not feasible in engineering.
(4)纵吹单元间隔长，冷阴极效应弱，较小电流时电弧温度高，出气量大，灭弧门槛电流小，灭弧灵敏度高。可以把电弧熄灭在很小值。横吹单元间隔小冷阴极效应强，电弧要在很大值时才产生灭弧气流，灭弧门槛电流大，灭弧难度大。纵吹间隔大，灭弧率高(电弧温度高，灭弧气流强)重燃率极低(电弧突变拐弯处双段同时灭弧)。纵吹由于单元灭弧间隔小为避免重燃必须要非常长的几何长度。陶瓷材料强度及耐电弧温度高于硅胶，纵吹灭弧阈值远大于横吹。(4) The longitudinal blowing unit has a long interval, the cold cathode effect is weak, the arc temperature is high at a small current, the gas output is large, the arc extinguishing threshold current is small, and the arc extinguishing sensitivity is high. The arc can be extinguished at a small value. The horizontal blowing unit has a small cold cathode effect, and the arc has a large value to generate the arc extinguishing air flow. The arc extinguishing threshold has a large current and the arc extinguishing is difficult. The longitudinal blowing interval is large, the arc extinguishing rate is high (the arc temperature is high, the arc extinguishing airflow is strong), and the re-ignition rate is extremely low (the arc is suddenly bent at the same time and the arc is extinguished at the same time). Longitudinal blowing requires a very long geometric length due to the small arc-break interval of the unit to avoid re-ignition. The strength and arc resistance of ceramic materials are higher than that of silica gel, and the threshold of longitudinal blowout is much larger than that of cross blow.
(5)横吹灭弧装置造价高，灭弧率低，而纵吹灭弧装置生产、安装更简便，造价低廉。(5) The horizontal blowing and arc extinguishing device has high cost and low arc extinguishing rate, and the vertical blowing and arc extinguishing device is simpler in production and installation, and the cost is low.
2.灭弧管狭小在极小电流下(毫安级)即可产生强烈灭弧气流，灭弧动作门槛极低，利于暂态电弧的深度抑制。2. The arc extinguishing tube is small and can generate a strong arc extinguishing air flow at a very small current (mA level). The arc extinguishing action threshold is extremely low, which is conducive to the deep suppression of the transient arc.
3.采用冷阴极作为电极，可以降低电弧温度，对熄灭稳态电弧有利。3. Using a cold cathode as the electrode can reduce the arc temperature and is advantageous for extinguishing the steady arc.
4.本发明的结构简单，生产成本低，工作稳定，安全可靠，灭弧效果好，有效降低电力系统输电线路雷击跳闸率及事故率、提高电力系统稳定性。4. The invention has the advantages of simple structure, low production cost, stable work, safety and reliability, good arc extinguishing effect, effectively reducing the lightning trip rate and accident rate of the power transmission line of the power system, and improving the stability of the power system.
图1是本发明一实施例的结构示意图。1 is a schematic view showing the structure of an embodiment of the present invention.
图2是本发明中纵吹灭弧装置的结构示意图。2 is a schematic view showing the structure of a longitudinal blowout arc extinguishing device of the present invention.
图3是本发明中灭弧管的结构示意图。Figure 3 is a schematic view showing the structure of an arc extinguishing tube in the present invention.
图4是本发明另一实施例的结构示意图。Figure 4 is a schematic view showing the structure of another embodiment of the present invention.
附图标记：Reference mark:
1-绝缘子串，2-接地侧连接金具，3-灭弧装置主体，4-引弧盘，5-接地侧电极，6-导线侧电极，7-通孔，8-灭弧管，9-小铜管，10-金属球，11-外壁陶瓷管。1-insulator string, 2-ground side connection fitting, 3-extinguishing unit body, 4-lead disc, 5-ground side electrode, 6-wire side electrode, 7-through hole, 8-extinguised tube, 9- Small copper tube, 10-metal ball, 11-outer wall ceramic tube.
下面结合附图对本发明进一步说明。The invention will now be further described with reference to the accompanying drawings.
实施例1：Example 1:
如图1、图2和图3所示，一种多间隙自膨胀强气流纵吹灭弧防雷保护装置，包括通过接地侧连接金具2固定安装在绝缘子串1接地端上的纵吹灭弧装置、接地侧电极5和导线侧
电极6；所述的接地侧电极5安装在纵吹灭弧装置上；所述的导线侧电极6的一端通过夹具安装在架空导线上，另一端指向接地侧电极5；所述的接地侧电极5与导线侧电极6形成的保护间隙与绝缘子串1相并列；其中，所述的纵吹灭弧装置包括灭弧装置主体3和灭弧管8；所述的灭弧装置主体3设有若干个通孔7；所述的灭弧管8放置在灭弧装置主体3的通孔7内，并且端部相互接触的灭弧管8两两之间形成的角度为90°；所述在灭弧装置主体3上下端部的灭弧管8互相错开放置，使灭弧装置主体3内的灭弧管8呈螺旋回形状排列；所述的接地侧电极5通过导线与第一个灭弧管相连接，所述的接地侧连接金具2通过导线与最后一个灭弧管相连接。As shown in FIG. 1 , FIG. 2 and FIG. 3 , a multi-gap self-expanding and strong airflow longitudinal blowout arc-breaking lightning protection device comprises a longitudinal blow-extinguishing arc fixedly mounted on the grounding end of the insulator string 1 through a ground-side connecting fitting 2 Device, ground side electrode 5 and wire side
The electrode 6 is mounted on the longitudinal blow-extinguishing device; one end of the wire-side electrode 6 is mounted on the overhead wire by a clamp, and the other end is directed to the ground-side electrode 5; the ground-side electrode 5, the protective gap formed with the wire side electrode 6 is juxtaposed with the insulator string 1; wherein the vertical blowout arc extinguishing device comprises the arc extinguishing device body 3 and the arc extinguishing tube 8; the arc extinguishing device body 3 is provided with a plurality of a through hole 7; the arc extinguishing tube 8 is placed in the through hole 7 of the arc extinguishing device main body 3, and an angle formed between the two ends of the arc extinguishing tube 8 in contact with each other is 90°; The arc extinguishing tubes 8 at the upper and lower ends of the main body 3 of the arc device are staggered from each other, so that the arc extinguishing tubes 8 in the main body 3 of the arc extinguishing device are arranged in a spiral shape; the grounding side electrode 5 passes through the wires and the first arc extinguishing tube Connected, the ground side connecting metal fitting 2 is connected to the last arc extinguishing tube through a wire.
所述的灭弧管8主要由设置在两端的小铜管9、设置在中间位置的金属球10和外壁陶瓷管11组成；所述的接地侧电极5通过导线与灭弧装置主体内的第一个灭弧管首端的小铜管连接，末端的小铜管与第二个灭弧管首端的小铜管垂直错位连接，以此螺旋连接下去，电弧以此路径通过每个灭弧管，电弧通过灭弧管时，击穿小铜管和金属球，加热管内的空气，空气膨胀后将拉长的脆弱电弧从每个灭弧管两端的小铜管孔纵向高速吹出熄灭。The arc extinguishing tube 8 is mainly composed of a small copper tube 9 disposed at both ends, a metal ball 10 disposed at an intermediate position, and an outer wall ceramic tube 11; the grounding side electrode 5 passes through the wire and the body of the arc extinguishing device a small copper tube at the head end of an arc extinguishing tube is connected, and a small copper tube at the end is vertically misaligned with a small copper tube at the head end of the second arc extinguishing tube, and is spirally connected, and the arc passes through each arc extinguishing tube in this path. When the arc passes through the arc extinguishing tube, it breaks through the small copper tube and the metal ball, heats the air inside the tube, and after the air expands, the elongated fragile arc is blown out from the small copper tube hole at both ends of each arc extinguishing tube at a high speed.
所述的纵吹灭弧装置还包括引弧盘4，所述的接地侧电极5穿过引弧盘4安装在纵吹灭弧装置的灭弧装置主体3上。The longitudinal blow-extinguishing device further includes an arcing disk 4, and the ground-side electrode 5 is mounted on the arc extinguishing device main body 3 of the longitudinal blowing and extinguishing device through the arcing disk 4.
所述的灭弧装置主体3的形状为圆柱状，即为圆柱柱体。The shape of the arc extinguishing device body 3 is cylindrical, that is, a cylindrical cylinder.
实施例2：Example 2:
如图4所示，本实施例与实施例1的区别在于：所述的灭弧装置主体3的形状呈L形，即为L形柱体。As shown in FIG. 4, the difference between the present embodiment and the first embodiment is that the shape of the arc extinguishing device main body 3 is L-shaped, that is, an L-shaped cylinder.
上述实施例1和2，结构简单、工作稳定、安全可靠；利用灭弧装置主体的体积，将灭弧管的摆放形状设置为螺旋回形状，使电弧路径由直线转变为螺旋立体环状，将电弧拉长了数倍，并有突变拐弯，使电弧脆弱性提高，易于被熄灭且不易重燃。采用的多点纵吹灭弧方式，利用电弧烘烤多产气材料产生强气流在多处同时在纵向切断电弧。多点纵吹使电弧断点长度大幅度快速提高，使电弧重燃率大幅度降低；比多点横吹有效灭弧性能大幅度提高。
The above embodiments 1 and 2 have simple structure, stable operation, safety and reliability; and the shape of the arc extinguishing tube is set to a spiral shape by using the volume of the main body of the arc extinguishing device, so that the arc path is changed from a straight line to a spiral three-dimensional ring shape. The arc is stretched several times and has abrupt turns, which increases the fragility of the arc, is easily extinguished and is not re-ignitable. The multi-point longitudinal blowing and arc-extinguishing mode is adopted, and the arc-baked multi-product gas material is used to generate a strong airflow to cut the arc in the longitudinal direction at multiple places. The multi-point longitudinal blowing greatly increases the length of the arc breakpoint and greatly reduces the re-ignition rate of the arc. The effective arc-extinguishing performance is greatly improved compared with the multi-point cross-blow.
Claims (4)
- 一种多间隙自膨胀强气流纵吹灭弧防雷保护装置，包括通过接地侧连接金具(2)固定安装在绝缘子串(1)接地端上的纵吹灭弧装置、接地侧电极(5)和导线侧电极(6)；所述的接地侧电极(5)安装在纵吹灭弧装置上；所述的导线侧电极(6)的一端通过夹具安装在架空导线上，另一端指向接地侧电极(5)；所述的接地侧电极(5)与导线侧电极(6)形成的保护间隙与绝缘子串(1)相并列；其特征在于：所述的纵吹灭弧装置包括灭弧装置主体(3)和灭弧管(8)；所述的灭弧装置主体(3)设有若干个通孔(7)；所述的灭弧管(8)放置在灭弧装置主体(3)的通孔(7)内，并且端部相互接触的灭弧管(8)两两之间形成的角度为90°；所述在灭弧装置主体(3)上下端部的灭弧管(8)互相错开放置，使灭弧装置主体(3)内的灭弧管(8)呈螺旋回形状排列；所述的接地侧电极(5)通过导线与第一个灭弧管相连接，所述的接地侧连接金具(2)通过导线与最后一个灭弧管相连接。A multi-gap self-expanding and strong airflow vertical blowout arc-breaking lightning protection device comprises a longitudinal blow-extinguishing device and a ground-side electrode (5) fixedly mounted on the grounding end of the insulator string (1) through a ground-side connecting fitting (2) And a wire side electrode (6); the ground side electrode (5) is mounted on the longitudinal blowout arc extinguishing device; one end of the wire side electrode (6) is mounted on the overhead wire by a clamp, and the other end is directed to the ground side The electrode (5); the protective gap formed by the ground-side electrode (5) and the wire-side electrode (6) is juxtaposed with the insulator string (1); wherein the longitudinal blow-extinguishing device comprises an arc-extinguishing device The main body (3) and the arc extinguishing tube (8); the arc extinguishing device body (3) is provided with a plurality of through holes (7); the arc extinguishing tube (8) is placed in the main body of the arc extinguishing device (3) The angle formed between the two sides of the through hole (7) and the end portions of the arc extinguishing tube (8) which are in contact with each other is 90°; the arc extinguishing tube at the upper and lower ends of the main body (3) of the arc extinguishing device (8) Disposed so that the arc extinguishing tubes (8) in the main body (3) of the arc extinguishing device are arranged in a spiral shape; the grounding side electrode (5) is connected to the first arc extinguishing tube through a wire, of The grounding side connection fitting (2) is connected to the last arc extinguishing tube by a wire.
- 根据权利要求1所述的多间隙自膨胀强气流纵吹灭弧防雷保护装置，其特征在于：所述的灭弧管(8)主要由设置在两端的小铜管(9)、设置在中间位置的金属球(10)和外壁陶瓷管(11)组成；所述的接地侧电极(5)通过导线与灭弧装置主体内的第一个灭弧管首端的小铜管连接，末端的小铜管与第二个灭弧管首端的小铜管垂直错位连接，以此螺旋连接下去，电弧以此路径通过每个灭弧管，电弧通过灭弧管时，击穿小铜管和金属球，加热管内的空气，空气膨胀后将拉长的脆弱电弧从每个灭弧管两端的小铜管孔纵向高速吹出熄灭。The multi-gap self-expansion strong airflow vertical blowout arc-break protection device according to claim 1, wherein the arc extinguishing tube (8) is mainly provided by a small copper tube (9) disposed at both ends, The metal ball (10) in the middle position and the outer wall ceramic tube (11) are formed; the grounding side electrode (5) is connected to the small copper tube at the head end of the first arc extinguishing tube in the main body of the arc extinguishing device through the wire, and the end is The small copper tube is vertically misaligned with the small copper tube at the first end of the second arc extinguishing tube, and the spiral is connected by the spiral. The arc passes through each arc extinguishing tube in this path, and the arc breaks through the small copper tube and the metal when the arc passes through the arc extinguishing tube. The ball heats the air inside the tube. After the air expands, the elongated fragile arc is blown out from the small copper tube hole at both ends of each arc extinguishing tube at a high speed.
- 根据权利要求1或2所述的多间隙自膨胀强气流纵吹灭弧防雷保护装置，其特征在于：所述的灭弧装置主体(3)的形状为圆柱状，或呈L形。The multi-gap self-expanding strong airflow vertical blowout arc-break protection device according to claim 1 or 2, wherein the arc extinguishing device body (3) has a cylindrical shape or an L shape.
- 根据权利要求1或2所述的多间隙自膨胀强气流纵吹灭弧防雷保护装置，其特征在于：所述的纵吹灭弧装置还包括引弧盘(4)，所述的接地侧电极(5)穿过引弧盘(4)安装在纵吹灭弧装置的灭弧装置主体(3)上。 The multi-gap self-expanding strong airflow vertical blowout arc-break protection device according to claim 1 or 2, wherein the longitudinal blow-extinguishing device further comprises an arcing disk (4), the grounding side The electrode (5) is mounted on the arc extinguishing device body (3) of the longitudinal blow-extinguishing device through the arcing disk (4).
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| CN201310562627.1 | 2013-11-13 | ||
| CN201310562627.1A CN103594210B (en) | 2013-11-13 | 2013-11-13 | Multiple level self-expanding air blast is vertical blows out arc lightning protection device |
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