CN110137889A - A kind of anti-dancing device of New Damping type - Google Patents

Abstract

A novel damping type anti-dancing device provided by the present invention includes a steel wire cable, a hanger spring shock absorber and a gravity concrete foundation, wherein one end of the hanger spring shock absorber is installed on the gravity concrete foundation, and the other end The cable is installed at the lowest sag point of the conductor's sag or on the frame of the spacer bar fixed on the conductor through the steel wire rope; the present invention can effectively prevent the galloping of the conductor, especially restrain the conductor from dancing up and down. The present invention has a simple structure and can Suitable for wires with different split numbers.

Description

A new type of damping anti-dancing device

technical field

The invention relates to an electric power transmission line protection device, in particular to a novel damping type anti-dancing device.

Background technique

Galloping of overhead transmission lines is a kind of self-excited vibration with low frequency and large amplitude, and vertical motion is the main movement in galloping. Galloping may cause short circuit between lines and grounding, and the losses include arc burns, broken strands, broken lines, tower damage, tower collapse, damage to anti-vibration hammer and spacer rods, etc., especially for ice-coated wires, the damage is more serious , if galloping cannot be effectively suppressed, it will bring serious economic losses and power grid safety accidents.

As the voltage level increases, transmission lines use split wires with different split numbers, and the split wires are more prone to galloping. Therefore, it is urgent to develop corresponding effective anti-dance devices for UHV and EHV lines. Existing interphase spacers, anti-dancing devices, etc. can reduce the degree of galloping to a certain extent, but it is still difficult to meet the requirements, and the existing related insulating stay wire anti-dancing devices have rigid breaking force, which may also cause breakage under certain circumstances. Lines, falling towers and other accidents.

Contents of the invention

The object of the present invention is to provide a novel damping type anti-dancing device, which solves the deficiencies in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A novel damping type anti-dancing device provided by the present invention includes a steel wire cable, a hanger spring shock absorber and a gravity concrete foundation, wherein one end of the hanger spring shock absorber is installed on the gravity concrete foundation, and the other end The cable is installed at the lowest sag point of the sag of the conductor or on the frame of the spacer bar fixed on the conductor through the steel wire rope.

Preferably, the hanger spring shock absorber includes a housing, a pull rod, a spring, a pressure plate and a rotating nut, wherein the housing is a U-shaped structure, and one end of the pull rod passes through the top of the housing and is placed on the outside of the housing to be pulled by the wire rope. Cable connection, the other end of the pull rod is placed in the inner cavity of the housing, and at the same time, a spring, a pressure plate and a rotating nut are sequentially set on this section;

Both sides of the open end of the shell are provided with side ears, and the connection with the gravity concrete foundation is realized through the side ears.

Preferably, a pull ring is arranged between the pull rod and the steel wire cable.

Preferably, a composite insulator is arranged between the steel wire rope stay cable and the conductor.

Preferably, the upper end of the composite insulator is connected to the wire or the frame of the spacer bar fixed on the wire through the first fitting.

Preferably, the first hardware includes a first U-shaped hanging ring, a first connecting plate, a right-angle hanging plate and a ball hanging plate, wherein the first U-shaped hanging ring is hung at the lowest sag point of the wire or at the bottom of the spacer bar. On the frame, the open end of the first U-shaped hanging ring is sequentially connected with the first connecting plate, the right-angle hanging plate and the ball hanging plate, and the open end of the ball hanging plate is connected with the composite insulator.

Preferably, the steel wire rope stay cable and the composite insulator are connected through a second metal fitting.

Preferably, the second hardware includes a second U-shaped hanging ring, a second connecting plate and a bowl hanging plate, wherein the other end of the composite insulator is connected to the bowl hanging plate, the second connecting plate and the second U-shaped hanging ring in sequence , the free end of the second U-shaped hanging ring is connected with the wire rope stay cable.

Preferably, one end of the composite insulator is a steel cap structure, and the other end is a ball head structure; the end of the steel cap structure is provided with a ball head clamping groove.

Preferably, several composite insulators are provided, and the several composite insulators are connected in series, and the ball head structure of the composite insulator placed on the upper end is clamped in the ball head slot on the composite insulator placed on the lower end, and fixed by pins. Lock.

Compared with prior art, the beneficial effect of the present invention is:

A new type of damping anti-dancing device provided by the present invention provides a certain gravity through the gravity concrete foundation, balances the pull-up force when the wire dances, and offsets the instantaneous impact force when the wire dances through the hanger spring shock absorber, that is, the wire dances Instantaneous pull-up force, and prevent disconnection accidents under the action of rigid cable hard connection; the invention can effectively prevent wire galloping, especially suppress the wire galloping up and down, the invention has a simple structure and is suitable for various split number of wires.

Further, the insulation safety of the dance-proof device and the dance-proof device is ensured through the composite insulator.

Further, the upper end of the composite insulator is connected to the lowest hanging part of the conductor or the frame of the spacer bar fixed on the conductor through the first fitting, and the upper end of the steel wire rope stay cable is connected to the lower end of the composite insulator through the second fitting. The fittings and the second fittings are combined fittings to connect the composite insulator in the anti-dancing device, and the insulation is safe and reliable. All components are general-purpose fittings for electric power, not special-purpose fittings, with low cost and easy operation.

Description of drawings

Fig. 1 is the structural representation of anti-dancing device that the present invention relates to;

Fig. 2 is a structural schematic diagram of the hanger spring shock absorber;

Fig. 3 is a schematic diagram of the connection mode of conductors, composite insulators, and steel wire rope cables;

Fig. 4 is a schematic diagram of the connection mode of spacers, composite insulators, and steel wire rope cables;

In the figure, 1, conductor 2, composite insulator 3, steel wire rope stay cable 4, hanger spring shock absorber 5, concrete foundation 6, spacer rod 70, first U-shaped hanging ring 71, second U-shaped hanging ring 80, the first U-shaped hanging ring One connecting plate 81, the second connecting plate 9, right angle hanging plate 10, ball end hanging plate 11, bowl end hanging plate 12, draw ring 13, housing 14, pull bar 15, spring 16, pressing plate 17, nut.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Fig. 1, a kind of novel damping type anti-dancing device provided by the present invention comprises composite insulator 2, steel wire cable stay cable 3, hanger spring shock absorber 4 and gravity type concrete foundation 5, wherein, gravity type concrete foundation 5 The upper end of the ground is about 50 cm above the ground, and anchor bolts are poured on the upper end surface. The lower part of the gravity concrete foundation 5 is placed in the pit; Force, the gravity concrete foundation 5 requires three times the safety factor, that is, the gravity is equal to three times the wire galloping pull-up force.

One end of the hanger spring shock absorber 4 is installed on the gravity concrete foundation 5, and the other end is connected with one end of the composite composite insulator 2 through the steel wire cable 3, and the other end of the composite insulator 2 is installed at the lowest arc of the sag of the conductor 1. vertical point.

As shown in Figure 2, the hanger spring shock absorber 4 comprises housing 13, pull rod 14, spring 15, pressing plate 16 and rotating nut 17, and wherein, housing 13 is U-shaped structure, the both sides of the open end of this U-shaped structure Side lugs are all provided, and each side lug is provided with a threaded hole, and the threaded hole cooperates with bolts to realize the connection with the gravity concrete foundation 5 .

One end of the pull rod 14 passes through the top of the housing 13 and is placed on the outside of the housing 13 to connect with the wire rope stay cable 3. The other end of the pull rod 14 is placed in the inner cavity of the housing 13, and the end is equipped with a pressing plate 16 and a rotating nut 17. The spring 15 is placed between the housing 13 and the pressure plate 16, and at the same time, the spring 15 is set on the pull rod 14; the elongation of the spring 15 is adjusted by rotating the nut 17 to adjust the spring force.

A pull ring 12 is arranged between the pull rod 14 and the wire rope stay cable 3 .

The lower end of the housing 13 is provided with a flange, and the flange is provided with anchor bolt holes, and the housing 13 is fixed on the upper end of the gravity concrete foundation 5 through the anchor bolts at the upper end of the gravity concrete foundation 5; The ring 12 and the spring 15 are further compressed, and the pulling force required in the stretching process is also increasing. If the pulling force on the pull ring 12 is released, the spring 15 rebounds and resets.

The upper end of the composite insulator 2 is connected to the conductor 1 or the frame of the spacer bar 6 through the first fitting, as shown in Figure 3 and Figure 4, the connection position of the first fitting on the conductor 1 is at the lowest sag point of the conductor sag , the upper end of the steel wire rope stay cable 3 is connected to the lower end of the composite insulator 2 through the second fitting, and the lower end of the steel wire rope stay cable 3 is fixedly connected to the pull ring 12 on the elastic hanger of the hanger spring shock absorber 4, and the steel wire rope stay cable 3. Straighten under the action of the spring force of the hanger spring shock absorber 4 and be perpendicular to the ground.

The main function of the hanger spring shock absorber 4 is to offset the instantaneous impact force when the wire 1 gallops, that is, the instantaneous upward pulling force of the wire dance, and to prevent disconnection accidents under the hard connection of the rigid cable; The vibrator 4 requires a tensile strength greater than the maximum pull-out force while satisfying a safety factor of three times.

As shown in Figure 3 and Figure 4, the first hardware includes a first U-shaped hanging ring 70, a first connecting plate 80, a right-angle hanging plate 9 and a ball-end hanging plate 10, wherein the first U-shaped hanging ring 70 is mounted on At the lowest sag point of the wire 1 or on the frame of the spacer bar 6, the open end of the first U-shaped hanging ring 70 is connected with the first connecting plate 80, the right-angle hanging plate 9 and the ball hanging plate 10 in turn, and the ball hanging plate The open end of 10 is connected with composite insulator 2.

The second hardware includes a second U-shaped hanging ring 71, a second connecting plate 81 and a bowl hanging plate 11, wherein the other end of the composite insulator 2 is connected with the bowl hanging plate 11, the second connecting plate 81 and the second U-shaped hanging plate in sequence. The hanging ring 71 is connected, and the free end of the second U-shaped hanging ring 71 is connected with the wire rope stay cable 3 .

In this embodiment, the composite insulator 2 is a composite insulator string composed of multiple composite insulators. The upper end of a single composite insulator 2 is a steel cap, and the lower end is a ball head. The steel cap is provided with a ball head slot matching the ball head. , the ball head at the lower end of a single composite insulator 2 is snapped into the ball head slot on the steel cap of the adjacent composite insulator 2 at the lower end and locked with a pin to connect two composite insulators 2 in series, and multiple composite insulators 2 are connected in sequence Composite insulator strings are formed in series to increase the insulation level; the insulation strength of composite insulator strings is one level higher than the nominal voltage of the line.

The ball head of the ball end of the ball end hanging plate 10 is snapped into the ball joint groove at the upper end of the composite insulator 2 or the composite insulator string and locked by a pin, so that the ball end hanging plate 10 and the upper end of the composite insulator 2 are fixed; The other end of the head hanging plate 10 is connected with one end of the right-angle hanging plate 9 by bolts, the other end of the right-angle hanging plate 9 is connected with one end of the connecting plate 8 by bolts, and the U-shaped hanging ring 7 is clamped on the wire 1 or the spacer bar 6 On the frame, the other end of connecting plate 8 is connected by bolt with the open end of U-shaped hanging ring 7 by bolt.

The steel wire rope stay cable 3 mainly connects the composite insulator 2 and the hanger spring shock absorber 4, and its tensile strength is greater than the maximum pull-out force of the conductor 1, and meets three times the safety factor. The upper end of the steel wire rope stay cable 3 is connected in the ring groove of the U-shaped hanging ring 7 under the composite insulator 2, and the lower end of the steel wire rope stay cable 3 is connected on the pull ring 12, and the length of the steel wire rope stay cable 3 is adjusted so that the steel wire rope stay cable 3 Straighten and perpendicular to the ground, due to the spring force of the spring 15, the wire rope pull cable 3 is elastically pulled under the wire 1 or the spacer bar 6, and when the wire 1 dances up and down, it plays a damping effect on the dance of the wire 1. Buffers galloping of wire 1. In this embodiment, it is required that the strength of the relevant fittings is less than three times the pull-out force of the safety factor, and it is enough to meet 90%, and it can be broken under extreme conditions, so as to prevent the spacer 6, the wire 1, the pole tower, etc. from being broken or broken by external force. Fall tower.

Claims (10)

1. a kind of anti-dancing device of New Damping type, which is characterized in that including wirerope draw cable (3), suspension spring damper (4) and Gravity type concrete foundation (5), wherein one end of suspension spring damper (4) is mounted on gravity type concrete foundation (5), At the minimum arc sag point for the arc sag that the other end draws cable (3) to be mounted on conducting wire (1) by wirerope or between being fixed on conducting wire (1) Every on the frame of stick (6).

2. a kind of anti-dancing device of New Damping type according to claim 1, which is characterized in that suspension spring damper (4) Including shell (13), pull rod (14), spring (15), pressing plate (16) and rotating nuts (17), wherein shell (13) is U-shaped structure, One end of pull rod (14) passes through the top of shell (13) and is placed in the outside of shell (13) and connect with wirerope drawing cable (3), pull rod (14) the other end is placed in the inner cavity of shell (13), meanwhile, spring (15), pressing plate (16) and rotation are successively set in the section Nut (17)；

The two sides of the open end of shell (13), which are provided with, picks up the ears, and realizes the company with gravity type concrete foundation (5) by picking up the ears It connects.

3. a kind of anti-dancing device of New Damping type according to claim 2, which is characterized in that pull rod (14) and wirerope are drawn Pull ring (12) are provided between cable (3).

4. a kind of anti-dancing device of New Damping type according to claim 1, which is characterized in that wirerope draws cable (3) and leads Composite insulator (2) are provided between line (1).

5. a kind of anti-dancing device of New Damping type according to claim 1, which is characterized in that composite insulator (2) it is upper End is connected on conducting wire (1) or is fixed on by the first fitting on the frame of the conductor spacer (6) on conducting wire (1).

6. a kind of anti-dancing device of New Damping type according to claim 5, which is characterized in that the first fitting includes the first U Type link (70), the first yoke plate (80), right angle hanging plate (9) and ball-clevis (10), wherein the first U-shaped link (70) is mounted on At the minimum arc sag point of conducting wire (1) or on the frame of conductor spacer (6), the open end of the first U-shaped link (70) is successively with first Plate (80), right angle hanging plate (9) and ball-clevis (10) connection, the open end of ball-clevis (10) is connect with composite insulator (2).

7. a kind of anti-dancing device of New Damping type according to claim 4, which is characterized in that wirerope draws cable (3) and multiple It closes and is connected between insulator (2) by the second fitting.

8. a kind of anti-dancing device of New Damping type according to claim 7, which is characterized in that the second fitting includes the 2nd U Type link (71), the second yoke plate (81) and socket-clevis eye (11), wherein the other end of composite insulator (2) is successively hung with bowl head Plate (11), the second yoke plate (81) and the second U-shaped link (71) connection, the free end of the second U-shaped link (71) and wirerope draw cable (3) it connects.

9. a kind of anti-dancing device of New Damping type according to claim 4, which is characterized in that the one of composite insulator (2) End is steel cap structure, and the other end is ball head structure；The steel cap structure is provided with bulb card slot on end.

10. a kind of anti-dancing device of New Damping type according to claim 9, which is characterized in that composite insulator (2) setting There are several, be connected in series between several composite insulators (2), is placed in the ball head structure card of the composite insulator (2) of upper end In the bulb card slot on the composite insulator (2) for being placed in lower end, and pass through pin solid lock.