55 results about "Arcing horns" patented technology

Electric switchgear device comprising at least one electric pole-unit comprising a stationary contact part made of conducting material, a movable contact part and an arc chute. The arc chute comprises two side parallel flanges, a rear wall, and a bottom arcing horn made of conducting material, electrically connected to the stationary contact part. Said bottom arcing horn is surrounded by a periphery made of gas-generating material. The arc chute comprises a stack of separators at least two of which separators comprise a notch. The arc chute comprises at least one regenerating separator placed parallel to the bottom arcing horn, said at least one separator comprising at least one metallic surface covering at least half of the notches in the longitudinal mid-plane.

The invention discloses a discharge gap device for preventing surface flashover of an insulator, which can solve the problem that the surface flashover of the insulator is cuased under the overvoltage to burn the insulator. The technical scheme of the invention is as follows: the discharge gap device comprises a high voltage arc initiating ring, an arcing horn, a pressing plate and a fastening piece; the high voltage arc initiating ring is arranged at a high voltage end of the insulator; a fixing plate and the pressing plate are arranged at a low voltage end of the insulator; and the arcing horn is connected with the fixing plate by the fastening piece, and the other end of the arcing horn bends downwards to form a discharge gap with the high voltage arc initiating ring. The discharge gap device not only can be directly fixed on fittings of two ends of a composite insulator, but also can be fixed on a cross yoke plate by installing holes to be connected with a ceramic insulator. The invention provides the novel discharge gap device adaptive to the composite insulator and the ceramic insulator and having rapidness in installation, adjustable gap, stable discharge voltage and good arc resistance and arc quenching performance.

The invention discloses a composite insulator with functions of thunder prevention and icing flashover prevention. The composite insulator comprises a lightning arrester and two sub-insulators, wherein the lightning arrester and the sub-insulators are connected to form an inverted Y-shaped integral structure through a connecting plate fitting, and arcing horns are arranged on the two sub-insulators located at the lower end of the inverted Y-shaped integral structure. The composite insulator can integrate the functions of thunder prevention and icing flashover prevention and is likely to meet the dimensional requirement of an original tower window structure, properties such as windage yaw, thunder prevention and the like of a circuit are not influenced, the insulating property is not influenced after lightning discharge, the insulator is high in insulating strength and long in service life, only one suspension point is required to be arranged on a tower, the installation is simple and convenient, and the tower structure is not required to be changed, so that the investment is saved and the maintenance cost is reduced.

An object of the present invention is to provide an arcing horn system having a highly efficient dynamic current shutoff property including a dynamic current shutoff capability, for example, enough for the short circuit fault and other object thereof is to provide an arcing horn system capable of repeatedly maintaining the good dynamic current shutoff capability.

In an arcing horn system, an insulative tube 21 for surrounding a front end side of an arcing horn 11, 12 is provided and an air vent 21a communicating from a front end portion of the arcing horn 11, 12 to a front end surface of the insulative tube 21 is formed on the insulative tube 21, so that the arc jet is blown off from the air vent 21a upon the flashover in accordance with the thunder stroke. The insulative tube 21 is made of a polyamide resin. A cap 30 for covering the front end side of the insulative tube 21 is disposed so as to prevent the intrusion of the rain water into the air vent 21a.

The invention discloses an insulation coordination method for a UHV DC grounding electrode line. Including the following specific steps: step 1, select the arc angle gap value according to the operating overvoltage level; step 2, select the arc angle gap value according to the arc extinguishing ability; step 3, comprehensively select the gap according to the operating overvoltage level and arc extinguishing ability Based on the conclusion, the final arc angle configuration results are proposed. The design scheme of this method comprehensively considers the overvoltage along the UHV DC grounding electrode line and the arc extinguishing ability of the arcing angle, and uses the intersection method of the volt-ampere characteristic curve to determine the arcing angle gap value, which meets the insulation coordination requirements of the UHV DC grounding electrode line. , avoiding the technical problems of overvoltage breakdown of the UHV DC grounding electrode line and the inability to extinguish the arc due to DC freewheeling, and improving the operational reliability of the UHV DC grounding electrode line.

A secondary arc chute is for an electrical switching apparatus including a housing, a pair of separable contacts enclosed within the housing, and a primary arc chute disposed proximate the separable contacts in order to attract an arc generated by the separable contacts. The primary arc chute has a first end including an arc horn, and a second end. The secondary arc chute includes a chute member made from a magnetic material, such as nickel-plated steel, and including a first portion disposed at or about the arc horn of the primary arc chute, and a second portion. The chute member provides an extension of the primary arc chute in order to facilitate drawing the arc away from the separable contacts and to ground the arc into the housing of the electrical switching apparatus.

The invention provides an extra-high voltage DC grounding electrode circuit protection system, comprising a tower body, and a lightening conductor cross arm and a grounding electrode wire cross arm on the tower body, lightening conductors respectively fixed on two ends of the lightening conductor cross arm, and grounding electrode wires respectively fixed on two ends of the grounding electrode wire cross arm through an insulator S1 and an insulator S2. The connecting end of the grounding electrode wire and the insulator S1 is connected with one end of a gap C1. The connecting end of the grounding electrode wire and the insulator S2 is connected with one end of a gap C2. The other end of the gap C1 and the other end of the gap C2 are connected with one end of a lightning arrester. The other end of the lightning arrester is connected with the tower body. The technical scheme can reduce accidents of unipolar and even bipolar locking caused by arcing horn flashover of an extra-high voltage DC grounding electrode circuit, and realizes that one lightning arrester can protect two grounding electrode circuits, and ensures correct operation of unbalanced current protective equipment and grounding electrode circuit broken line detection protective equipment, and the system is not influenced by lightning arrester ground capacitance.

The invention discloses a horizontal and vertical blowing Coulomb force compression lightning arc extinguishing ball and a double-ball type arc angle. There are several layers of arc extinguishing channels inside the main body, and several U-shaped arc extinguishing tubes are placed in each layer of arc extinguishing channels, and the ends of two adjacent U-shaped arc extinguishing tubes in the same layer of arc extinguishing channels pass through The three-way pipes are connected; there is an air jet channel at the junction of the U-shaped arc extinguishing tube and the three-way pipe, and the air jet channel extends to the outer surface of the arc extinguishing ball, that is, the outer surface of the arc extinguishing ball is provided with an air jet. Outlet; there are respectively an arc striking electrode on the top and bottom of the outer surface of the arc extinguishing ball. The invention has a simple and reliable structure, attracts the lightning pilot, and reduces the transmission line shielding accident caused by the failure of lightning interception; the combination of horizontal and vertical blowing compresses, elongates, thins and sprays the lightning current, extinguishes the arc, and reduces the lightning protection caused by lightning. The counterattack probability caused by the line.

The invention provides a direct current earth electrode line flashover fault circuit model, an analysis method, and a system based on the arcing of an arcing horn. By employing an earth electrode line during flashover fault and the arcing condition of the arc horn of a fault tower, an external circuit volt-ampere curve and a static volt-ampere curve of an arc are constructed, the stable burning point of the arc is determined according to the intersection of the two curves, and various electrical parameters of the direct current earth electrode line flashover fault state are calculated. According to the direct current earth electrode line flashover fault circuit model, the analysis method, and the system, the research of direct current earth electrode line faults can be conducted, the calculating process of fault analysis is simple, line operation personnel can develop analysis work of the line faults, the accuracy of fault analysis can be improved, stable and reliable operation of a direct current power transmission system is guaranteed, and the working strength is reduced.

The invention relates to a suspension string used for electric power transmission lines and particularly relates to a V-type duplex single-hanging point four-splitting suspension string and which is suitable for increasingly high voltage levels, is anti-thunder and ensures the safe and stable operation of the power grid. The V-type duplex single-hanging point four-splitting suspension string comprises a four-hanging point four-splitting connection plate, two groups of suspension strings arranged in a V shape, an arcing horn I, an arching horn II, an arching ring I and an arching ring II. Each suspension ring comprises insulator chains formed by connecting insulators. One end of each insulation chain is connected with an iron tower cross arm, and the other end is connected with the four-hanging point four-splitting connection plate. The arching ring I and the arching ring II are matched with the arcing horn I and the arching horn II in use. The lead partition number is increased, and the V-type duplex single-hanging point four-splitting suspension string can be suitable for increasingly high voltage levels. The stress structure is reasonable, and the normal operation of the power transmission line is ensured. The length of the suspension ring is shortened, and the armour clamp and iron tower cost is lowered. The V-type duplex single-hanging point four-splitting suspension string is anti-thunder and suitable for two splitting, three splitting, four splitting, six splitting, eight splitting and the like.

The invention discloses a self-extinguishing arc device, and belongs to the technical field of power transmission. The self-extinguishing arc device comprises an insulation sub-string, arcing horns, aliquid electric negative gas storage device, a current transformer, a power supply and a controller, wherein arcing horns are oppositely arranged at two ends of the insulation sub-string, the liquidelectric negative gas storage device is arranged at contacts of the arcing horns and is hollow, electric sprayers are arranged at an outer side of the liquid electric negative gas storage device and communicate with a cavity of the liquid electric negative gas storage device, the electric sprayers on the corresponding arcing horns are arranged opposite to each other, the current transformer sleeves the arcing horns, the power source is electrically connected with the electric sprayer, and the controller is connected with the current transformer and the power supply in a communication way. By the self-extinguishing arc device, various arc extinguishing modes such as electric negative gas arc extinguishing, cooling arc extinguishing and arc blowing are achieved by the liquid electric negative gas storage device, and the arc extinguishing mode is effective and reliable.

[Problem] An arcing horn, or the like, for guiding an arc occurring when opening/closing an electric contact thereby preventing erosion of the contact point or a support material, or, a protruding portion of the support material provided at an extremity portion of the contact point in the direction in which the arc is driven thereby rendering the contact point difficult to melt, are known ways in prior art to prevent detachment and erosion. However, as these methods are only realizable if sufficient space can be secured for an arc-extinguishing chamber, or if sufficient dimensions of the support material can be secured, these methods are not necessarily adoptable if a device is to be reduced in size. [Solution] The present invention is characterized in that an electric contact point and a contact element having improved resistance to erosion are achieved by a reduction in the amount of erosion at the electric contact point, comprising pasting onto the surface of a pure silver layer on the back side of a contact point where detachment and erosion readily progress, a copper or a copper alloy having excellent electric conductivity, heat conductivity and mechanical strength as a functional layer, thereby conferring to the functional layer a function of transmitting to a support material the heat generated when opening/closing the electric contact, a function of shortening the duration of chattering, and a function of preventing detachment and erosion, or the like, by maintaining the strength of the bond with the support material.

The invention provides a method and device for selecting an arcing horn and an insulator string in an overhead transmission line. The selection method comprises the following steps: selecting a presetarcing horn according to an impact withstand voltage value which needs to be borne by the arcing horn in the transmission line, and determining the withstand voltage value of the preset arcing horn;obtaining the withstand voltage value of the insulator string according to the given parameters of insulators and the number of the insulators; calculating effectiveness index parameters of the presetarcing horn for the insulator string according to the withstand voltage value of the preset arcing horn and the withstand voltage value of the insulator string; and determining the arcing horn and the insulator string according to the validity index parameters. On the premise of discharging randomness, selection and matching of the arcing horn and the insulator string are facilitated, reference can be provided for selection and matching of the arcing horn and the insulator string under the condition that a complete test is not needed, the efficiency of selecting the arcing horn and the insulator string is improved, the reliability is high, the period of the method is short, and the cost is low.

The invention discloses a nozzle for a gas burner. The nozzle comprises an inlet section, a premixing section and an outlet section, wherein the premixing section is connected to the inlet section and the outlet section; the inlet section is provided with an arc horn-shaped channel gradually contracted from the inlet section to the premixing section, the premixing section is provided with primary injection air inlets, and the primary injection air inlets communicate with the arc horn-shaped channel. According to the nozzle for the gas burner, the arc horn-shaped channel is gradually contracted from the inlet section to the premixing section, the pressure of gas in the premixing section is small, external air can be easily injected through the primary injection air inlets under the effect of differential pressure, then the air coefficient of the mixed gas of the gas and the air can be increased, and therefore the complete burning degree of the gas can be effectively improved, and the burning heat efficiency and the utilization rate of the gas can be effectively increased. The invention further discloses the gas burner comprising the nozzle.