CN204884740U - Take 10kV circuit porcelain cross arm insulator lightning protection device of counter - Google Patents

Abstract

The utility model discloses a lightning protection device for a 10kV line porcelain cross-arm insulator with a counter, which comprises an arc striking electrode, a lightning protection device body, an insulating block, an adjusting plate, a connecting plate, a counter, connecting wires and a fixing plate; the fixing plate One end is fixedly connected to the steel foot of the 10kV line porcelain cross-arm insulator, and the other end of the fixed plate is fixedly connected to the adjustment plate. There are multiple installation position holes on the adjustment plate, and one installation position hole on the adjustment plate is fixedly connected to one end of the insulating block. , one side of the adjustment plate is fixedly connected with a connecting plate, the connecting plate is fixedly connected with a counter, the other end of the insulating block is connected with the low-voltage end of the lightning protection device body, and the high-voltage end of the lightning protection device body is connected with the arc striking electrode. The body of the lightning protection device is provided with two discharge balls, and the counter is connected to the body of the lightning protection device through connecting wires. The utility model is suitable for the lightning protection disconnection problem of porcelain cross-arm insulator towers of 10kV overhead lines, and can record the times of lightning strikes, and has practicality and economy.

Description

10kV Line Porcelain Crossarm Insulator Lightning Protection Device with Counter

technical field

The utility model relates to a lightning protection device, in particular to a 10kV line porcelain cross-arm insulator lightning protection device with a counter.

Background technique

The lightning overvoltage amplitude of 10kV overhead distribution lines is high and the discharge time is short, while the insulation level of 10kV distribution lines is low. Lightning overvoltage can cause flashover of insulators and form power frequency freewheeling blown on the lightning flashover channel wire.

The installation structure of the current lightning protection device is only suitable for straight poles and towers, and does not have the function of counting lightning strikes. For the lightning protection device of line porcelain cross-arm insulators, due to the complex structure of the distribution network line towers, most of them do not install lightning protection on the towers. device, resulting in no effective lightning protection measures for such towers.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings and deficiencies existing in the installation process of existing lightning protection devices, and provide a lightning protection device for 10kV line porcelain cross-arm insulators with a counter, which can effectively prevent lightning strikes and disconnection accidents at the same time , Solve the installation problem of the lightning protection device of the porcelain cross-arm insulator, thereby improving the overall lightning protection effect of the distribution network line, improving the reliability of power supply, and recording the number of lightning strikes.

In order to achieve the above purpose, the utility model provides a 10kV line porcelain cross-arm insulator lightning protection device with a counter, including an arc electrode, a lightning protection device body, an insulating block, an adjusting plate, a connecting plate, a counter, connecting wires and a fixing plate ;

One end of the fixing plate is fixedly connected to the steel foot of the porcelain cross-arm insulator of the 10kV line, and the other end of the fixing plate is fixedly connected to the adjusting plate. The position hole is fixedly connected to one end of the insulating block, one side of the adjusting plate is fixedly connected to a connecting plate, the connecting plate is fixedly connected to a counter, and the other end of the insulating block is connected to the low-voltage end of the lightning protection device body , the high-voltage end of the lightning protection device body is connected to the arc striking electrode, two discharge balls are arranged on the lightning protection device body, and the counter is connected to the lightning protection device body through a connecting wire.

In the above technical solution, the outer surface of the arc-starting electrode is the arc-starting surface that forms the first-level discharge gap between the conductive wire and the lightning protection device body, the inner surface of the arc-starting electrode is connected to a cylinder, and the center of the cylinder is provided with a The high-voltage end of the lightning protection device body is connected to the fixed screw hole by the screw rod, and a nut hole is arranged outside the center of the cylinder, and the nut hole covers the fixed nut at the high-voltage end of the lightning protection device body.

In the above technical solution, the central axis of the lightning protection device is interspersed with a plurality of zinc oxide valve sheets arranged at intervals, wherein two discharge balls are connected to the two zinc oxide valve sheets, and 6 discharge balls are formed between the two discharge balls. ~7.5mm second-level discharge gap.

In the above technical solution, the lightning protection device body is a zinc oxide arrester with an external series air gap for preventing lightning overvoltage and cutting off power frequency freewheeling.

In the above technical solution, one end of the insulating block is provided with two round holes, which are connected to the adjusting plate with bolts; the other end of the insulating block is provided with a round hole, which is used to fix the low-voltage end of the lightning protection device body through bolts.

In the above technical solution, the adjusting plate is a right-angle bending plate, one end of the adjusting plate is provided with a slot-shaped hole for connecting with one end of the fixing plate, and the other end of the adjusting plate is provided with three circular holes , the two round holes near the outside are connected to the insulating block through bolts, and the two round holes in the middle are connected to the fixed connection plate.

In the above technical solution, the connecting plate is a right-angle bending plate, one end of the connecting plate is provided with two round holes connected with the adjusting plate, and the other end of the connecting plate is provided with two round holes for connecting with the connection counter. a round hole.

In the above technical solution, two round holes are provided on the edge of the counter chassis for connecting with the adjustment plate, and a screw is provided in the middle of the counter chassis, and the screw is connected to the connecting wire through bolts.

In the above technical solution, the connecting wire is a copper core wire with a diameter of 25mm, and the ^two ends of the connecting wire are provided with 200A open copper lugs, one end of the connecting wire is connected to the low-voltage end of the lightning protection device body, and the other end of the connecting wire is used The nut is fixed on the screw rod in the middle of the counter chassis.

In the above technical solution, the fixing plate is a right-angle bending plate, and one end of the fixing plate is provided with two rows of ten equidistant round holes, one of which is used to connect with the slot-shaped hole of the adjusting plate; the fixing plate The other end is provided with a slotted hole.

The arc striking electrode of the utility model is made of aluminum alloy material, the cross section of the arc striking electrode is a curved surface, and the outer surface is a curved surface, so that the arc striking surface of the first-stage discharge gap is formed between the wire and the zinc oxide arrester; the arc striking The lower part of the electrode is cylindrical, the upper part of the center of the cylinder is provided with a fixing screw hole connected to the high-voltage end screw of the zinc oxide arrester, and the lower part of the center of the cylinder is a nut hole covering the fixing nut of the high-voltage end of the zinc oxide arrester. In this way, the electrode is designed in an arc shape, which can prevent the gap between the lead wire and the arc-leading electrode from changing too much even when the lead wire swings, thereby ensuring the stability of the discharge.

The first stage discharge gap is an air gap of 25-35 mm. There are two discharge balls connected to the lightning strike of the zinc oxide arrester, and a second-stage discharge gap of 6 to 7.5mm is formed between the two discharge balls. The lightning flashover protector makes two discharge balls in the middle of the zinc oxide arrester. The gap between two discharge balls is used as the second-level discharge gap.

The zinc oxide arrester is used to prevent lightning overvoltage and Zinc oxide surge arrester with external series gap to cut off power frequency freewheeling.

The beneficial effects of the utility model are:

In the utility model, the series gap of the lightning protection device body and the air gap between the lightning protection device body and the wires prevent the lightning flashover protector from being affected by power frequency voltage and operating overvoltage at ordinary times, thereby prolonging the lightning strike and flashover protector. service life of the network protector. Under the action of lightning overvoltage, the two series gaps can ensure the effective operation of the lightning flashover protector, limit the amplitude of lightning overvoltage and cut off the power frequency freewheeling to prevent insulator flashover accidents.

Reasonably design the connecting plate, fixing plate and counter, so that the entire lightning protection device will not shift and loosen in bad weather, and the number of lightning strikes of the lightning protection device can be recorded through the counter, especially suitable for porcelain cross-arm insulator towers installation, and the structural design of the device is not affected by the size of the cross-arm of the pole tower on site, so it can be installed reliably.

In summary, the utility model:

1. The unique design of connecting plate and fixing plate is used to make the installation of lightning protection device firm and reliable.

2. Simple design, convenient construction and installation;

3. It is suitable for 10kV overhead line porcelain cross-arm insulator towers, including insulated lines and bare wire lines to prevent insulated wires from being struck by lightning and disconnected.

Description of drawings

Fig. 1 is a structural schematic diagram of the lightning flashover protector of the present invention.

Fig. 2 is a schematic structural diagram of the arc starting electrode in Fig. 1 .

FIG. 3 is a schematic structural diagram of the main body of the lightning protection device in FIG. 1 .

FIG. 4 is a schematic structural diagram of the insulating block in FIG. 1 .

Fig. 5 is a schematic structural diagram of the regulating plate in Fig. 1 .

FIG. 6 is a schematic structural diagram of the connecting plate in FIG. 1 .

FIG. 7 is a schematic structural diagram of the counter in FIG. 1 .

FIG. 8 is a schematic structural diagram of the connecting wires in FIG. 1 .

FIG. 9 is a schematic structural diagram of the fixing plate in FIG. 1 .

In the figure: 1, arc striking electrode; 1.1, arc striking surface, 1.2, fixing screw hole, 1.3, nut hole, 2, lightning protection device body, 2.1, high voltage end screw, 2.2, fixing nut, 2.3, compression nut, 2.4. Composite jacket, 2.5. Zinc oxide valve plate, 2.6. Low pressure end screw, 2.7. Discharge ball, 3. Insulation block, 4. Regulating plate, 4.2. Regulating slot hole, 5. Connecting plate, 6. Counter, 6.2 , connecting screw, 7, connecting wire, 7.1, fixed round hole, 8, fixed plate, 8.2, fixed slot-shaped hole, 9, porcelain cross-arm insulator steel foot, 10, round hole.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, the following embodiments are explanations of the utility model and the present invention is not limited to the following embodiments.

The lightning protection device of the 10kV line porcelain cross-arm insulator pole tower designed by the utility model, referring to Fig. 1, includes an arc striking electrode 1, a lightning protection device body 2, an insulating block 3, an adjusting plate 4, a connecting plate 5, a counter 6, Connect the wire 7 and the fixed plate 8;

One end of the fixed plate 8 is fixedly connected to the steel foot 9 of the porcelain cross-arm insulator of the 10kV line, and the other end of the fixed plate 8 is fixedly connected to the adjusting plate 4. The adjusting plate 4 is provided with multiple installation position holes, and one installation position hole on the adjusting plate 4 The center is fixedly connected to one end of the insulating block 3, one side of the adjusting plate 4 is fixedly connected to a connecting plate 5, the connecting plate 5 is fixedly connected to a counter 6, and the other end of the insulating block 3 is connected to the low-voltage end of the lightning protection device body 2, The high voltage end of the lightning protection device body 2 is connected to the arc striking electrode 1 , two discharge balls 2.7 are arranged on the lightning protection device body 2 , and the counter 6 is connected to the lightning protection device body 2 through a connecting wire 7 .

The arcing electrode 1 is fixed on the high-voltage end of the lightning protection device body 2, and a first-stage discharge gap providing a lightning flashover channel is formed between the high-voltage wire and the lightning protection device body 2 . The first stage discharge gap is an air gap of 25-35 mm. The arc starting electrode 1 is made of aluminum alloy material. The cross section of the arc starting electrode 1 is an arc surface, and the upper surface is the arc starting surface 1.1 for forming the first-level discharge gap between the wire and the lightning protection device body 2 . As shown in Figure 2, the lower part of the arc striking electrode 1 is cylindrical, the upper part of the center of the cylinder is provided with a fixed screw hole 1.2 connected with the high-voltage end screw 2.1 of the lightning protection device body 2, and the lower part of the center of the cylinder is to cover The nut hole 1.3 of the fixing nut 2.2 at the high voltage end of the zinc oxide arrester 2. The fixed screw hole 1.2 of the arc striking electrode 1 can fix the arc striking electrode 1 on the high-voltage end screw 2.1 of the lightning protection device body 2, and the nut hole 1.3 can cover the fixing nut 2.2 after tightening, and at the same time, the arc striking electrode 1 can be installed firmly . When installed on the line, place the wire on the arcing surface 1.1 of the arc electrode 1 to form a discharge gap between the wire and the body 2 of the lightning protection device.

As shown in Figure 3, the high voltage end of the lightning protection device body 2 is connected to the arc striking electrode 1, and the low voltage end is fixed to one end of the regulating plate 5. Secondary discharge gap. The center of the zinc oxide arrester 2 is a zinc oxide valve plate 2.5, and two discharge balls 2.7 are connected to the zinc oxide valve plate 2.5. A second-stage discharge gap of 6-7.5mm is formed between the two discharge balls 2.7, which can limit lightning overshooting. voltage and cut off power frequency freewheeling. The composite jacket 2.4 is set on the zinc oxide valve plate 2.5, and provides the outer insulation of the zinc oxide arrester 2 to ensure sufficient insulation strength. The low-voltage end screw 2.6 of the lightning protection device body 2 is installed on the low-voltage end fixing screw hole 5.2 of the adjustment plate 5, Tighten the compression nut 2.3, so that the lightning protection device body 2 is connected in parallel to the insulator side, so as to prevent disconnection caused by lightning. Lightning protection device body 2 is used to prevent lightning overvoltage and The main body of the lightning protection device that cuts off the power frequency freewheeling flow.

As shown in FIG. 4 , one end of the insulating block 3 is provided with two round holes 10 for connecting the 10 of the adjustment plate 4 ; the other end is provided with a round hole 10 for fixing the low-voltage end of the lightning protection device body 2 .

As shown in Figure 5, the adjustment plate 4 is bent into a right-angle structure, and one end is provided with three round holes 10, and the two round holes near the outer end are used to connect the insulating block 3, and the two round holes in the middle section are used to fix the connecting plate. One end is provided with a groove-shaped hole and is connected with one end of the fixed plate 8, and the height can be adjusted up and down.

As shown in FIG. 6 , the connecting plate 5 is bent into a right-angle structure, and one end is provided with two circular holes 10 for connecting with the adjusting plate 4 , and the other end is provided with two circular holes 10 for fixing the counter 6 .

As shown in Figure 8, the connecting wire 7 is a copper core wire with a diameter of 25mm ^2. The two ends of the connecting wire 7 are provided with a 200A open copper nose. The other end is fixed on the middle screw rod 6.2 of the counter 6 chassis with a nut.

As shown in Figure 9, the fixed plate 8 is bent into a right-angle structure, and one end is provided with two rows of ten equidistant round holes 10, which are used to connect the grooved holes 4.2 of the adjusting plate 4 and can be adjusted left and right; the other end is provided with A slotted hole 8.2, fixed on the steel foot of the 10kV porcelain cross-arm insulator.

As shown in Figure 7, the outer edge of the chassis of the counter 6 is made of aluminum, and the edge is provided with two round holes 10 for connecting with the adjustment plate 4, and the middle of the chassis is provided with a screw 6.2, which is connected with the connecting wire 7 by bolts.

The working principle of the utility model is:

The size of the fixed screw hole 1.2 of the arc striking electrode 1 matches the size of the high voltage end screw 2.1 of the lightning protection device body 2, and the arc striking electrode 1 is fixed on the high voltage end screw 2.1. After tightening, the arc striking electrode 1 can be firmly placed on the It is fixed on the main body 2 of the lightning protection device. The arcing surface 1.1 forms a discharge gap between the wire and the zinc oxide arrester 2, the low-voltage end screw 2.6 of the lightning protection device body is fixed on the low-voltage end fixing screw hole 5.2 of the adjustment plate 5, and the four grooved holes of the adjustment plate 5 10. According to the distance between the main body of the lightning protection device and the wires on site, use two screw rods to select two slotted holes and fix them on the adjustment slotted holes 10 of the connecting plate, and fix one end of the connecting plate 4 on the two round holes of the insulating block 3 , the slot-shaped hole and round hole of the insulating block 3 are fixed at the steel foot of the insulator through the V-shaped bolt and the fixing round hole 7.1 of the spacer, and the lightning protection device body 2 is connected in parallel to the insulator side. When the power grid is in normal operation, since the arc electrode 1 forms a first-level discharge gap between the wire and the lightning protection device body 2, and the lightning protection device body 2 itself is designed with a second-level discharge gap, it forms two gaps with the air gap at the high-voltage end. A gap in series can isolate the power frequency voltage, so that the lightning protection device body 2 hardly bears the voltage, so that the lightning protection device body 2 can not act when the overvoltage is operated, and prolongs the service life of the lightning protection device body 2; Or under the action of lightning overvoltage generated by induced lightning, the two air gaps are simultaneously broken down, and the lightning protection device body 2 presents a low impedance, which discharges the lightning current into the ground; after the lightning impact, the power frequency voltage is loaded on the lightning protection device body , The resistance of the lightning protection device body 2 increases instantaneously when the AC zero crosses, the arc is naturally extinguished in a very short time, and the power frequency freewheeling is completely blocked.

Claims (10)

1. A 10kV line porcelain cross-arm insulator lightning protection device with a counter, characterized in that it comprises an arc striking electrode (1), a lightning protection device body (2), an insulating block (3), an adjusting plate (4), Connecting plate (5), counter (6), connecting wire (7) and fixing plate (8); one end of the fixing plate (8) is fixedly connected to the steel foot (9) of the porcelain cross-arm insulator of the 10kV line, and the fixed The other end of the plate (8) is fixedly connected to the adjustment plate (4), and the adjustment plate (4) is provided with a plurality of installation position holes, and one installation position hole on the adjustment plate (4) is fixedly connected to the insulating block ( 3), one side of the adjustment plate (4) is fixedly connected with a connecting plate (5), and the connecting plate (5) is fixedly connected with a counter (6), and the other end of the insulating block (3) It is connected to the low voltage end of the lightning protection device body (2), the high voltage end of the lightning protection device body (2) is connected to the arc striking electrode (1), and the lightning protection device body (2) is provided with two discharge A ball (2.7), the counter (6) is connected with the lightning protection device body (2) through a connecting wire (7). 2. The 10kV line porcelain cross-arm insulator lightning protection device with a counter according to claim 1, characterized in that: the outer surface of the arc starting electrode (1) is between the conductive wire and the lightning protection device body (2). The arc starting surface (1.1) forming the first-level discharge gap between them, the inner surface of the arc starting electrode (1) is connected to a cylinder, and the center of the cylinder is provided with a fixed screw (2.1) connected to the high voltage end of the lightning protection device body (2). A screw hole (1.2), a nut hole (1.3) is arranged outside the center of the cylinder, and the nut hole (1.3) covers the fixed nut (2.2) at the high pressure end of the lightning protection device body (2). 3. The 10kV line porcelain cross-arm insulator lightning protection device with a counter according to claim 2, characterized in that: the central axis of the lightning protection device (2) is interspersed with a plurality of zinc oxide valves arranged at intervals A sheet (2.5), wherein two discharge balls (2.7) are connected to the two zinc oxide valve sheets (2.5), and a second-level discharge gap of 6-7.5mm is formed between the two discharge balls (2.7). 4. The 10kV line porcelain cross-arm insulator lightning protection device with counter according to claim 1 or 2, characterized in that: the lightning protection device body (2) is used to prevent lightning overvoltage and cut off power frequency continuous Zinc oxide surge arresters with external series air gaps. 5. The 10kV line porcelain cross-arm insulator lightning protection device with counter according to claim 1, characterized in that: one end of the insulating block (3) is provided with two round holes (10), which are adjusted by bolts and The plates (4) are connected; the other end of the insulating block (3) is provided with a round hole (10), which is used to fix the low-voltage end of the lightning protection device body (2) through bolts. 6. The 10kV line porcelain cross-arm insulator lightning protection device with counter according to claim 1, characterized in that: the adjustment plate (4) is a right-angle bending plate, and one end of the adjustment plate (4) is set There is a slot-shaped hole (4.2) for connecting with one end of the fixing plate (8), and the other end of the adjusting plate (4) is provided with three round holes (10), and two round holes (10) near the outside It is connected with the insulating block (3) by bolts, and the two round holes (10) in the middle are connected with the fixed connecting plate (5). 7. The 10kV line porcelain cross-arm insulator lightning protection device with counter according to claim 1, characterized in that: the connecting plate (5) is a right-angle bending plate, and one end of the connecting plate (5) is set There are two round holes (10) connected with the adjusting plate (4), and the other end of the connecting plate (5) is provided with two round holes (10) for connecting with the connection counter (6). 8. The 10kV line porcelain cross-arm insulator lightning protection device with a counter according to claim 1, characterized in that two round holes (10) are provided on the edge of the chassis of the counter (6) for connecting with the adjustment plate Connect, be provided with screw rod (6.2) in the middle of counter (6) chassis, screw rod (6.2) is connected with connecting lead (7) by bolt. 9. The 10kV line porcelain cross-arm insulator lightning protection device with counter according to claim 1, characterized in that: the connecting wire (7) is a copper core wire with a diameter of 25mm, and the ^two connecting wires (7) There is a 200A open copper nose at the end, one end of the connecting wire (7) is connected to the low-voltage end of the lightning protection device body (2), and the other end of the connecting wire (7) is fixed to the middle screw (6.2) of the counter (6) chassis with a nut superior. 10. The 10kV line porcelain cross-arm insulator lightning protection device with counter according to claim 1, characterized in that: the fixed plate (8) is a right-angle bent plate, and one end of the fixed plate (8) is provided with two Ten equidistant circular holes (10) are arranged, wherein one circular hole (10) is used to be connected with the grooved hole (4.2) of the adjusting plate (4); the other end of the fixed plate (8) is provided with a grooved hole (8.2).