CN203760992U - Double spring end part vibration reducing type spacing rod - Google Patents

Abstract

The utility model relates to a double-spring end vibration-eliminating type interphase spacer, which is mainly suitable for lines with a voltage level of 66kV and above, and belongs to the field of design, operation, and maintenance of overhead transmission lines in electric power systems. Including interphase spacer insulators; the two ends of the interphase spacer insulators are respectively connected with sleeve type spring damper a and sleeve type spring damper b; sleeve type spring damper a and sleeve type spring damper The other end of b is respectively connected with the clamp gland through connecting fittings. The utility model adopts the end buffer structure of double damping springs, and the two sleeve-type spring dampers have the ability to absorb and reduce the self-excited oscillation energy on the line at the first time, so as to minimize the galloping energy transmitted along the interphase spacers and avoid Further stress bending of the line. The vibration-absorbing structure at the end of the double spring has a significant effect on preventing galloping of the ice-coated line and suppressing the sub-gap oscillation of the line. Combined with the characteristics of low cost, easy installation, and free operation and maintenance, it has a wide application prospect.

Description

A double-spring end vibration-absorbing type interphase spacer

technical field

The utility model relates to a double-spring end vibration-eliminating type interphase spacer, which is mainly suitable for lines with a voltage level of 66kV and above, and belongs to the field of design, operation, and maintenance of overhead transmission lines in electric power systems.

Background technique

Galloping of overhead transmission lines is a complex fluid-solid coupling vibration, and specific meteorological conditions are one of the main factors causing conductor galloping. When the ice-covered section of the overhead line is irregular in shape, such as crescent, fan, D, etc., and the ice thickness is between 3mm and 20mm, once it encounters a strong wind of 5-10m/s, it is very easy to induce The low-order natural frequency is a large amplitude of 0.1-3Hz, which is about 20-300 times the diameter of the wire, and self-excited vibration is called galloping. When galloping occurs, the full-scale overhead line vibrates in a large wave-like manner, and also swings, and the swing track is approximately elliptical along the line direction. Due to the large range of galloping and swinging, which lasts for a long time at a time, it is easy to cause phase-to-phase flashover, damage to hardware, cause line tripping and power outages, or cause serious accidents such as burning transmission lines, pulling down poles and towers, and breaking transmission lines, resulting in major economic losses.

Common anti-galling devices in current transmission lines include: detuned pendulums, double pendulum anti-galling devices, anti-galling whips, wire clamp rotary spacers, etc. It has been proved by practice that the effective method for galloping control is to install phase spacers. Although the traditional composite interphase spacer has a certain effect on suppressing galloping, when the weather conditions are extremely bad, the traditional composite interphase spacer often cannot play the role of suppressing line galloping. The fundamental reason is that the traditional interphase spacer lacks an energy release device and cannot quickly release the dancing energy on the line. The accumulated energy will eventually lead to the self-excited vibration of the line. Therefore, this kind of equipment has hidden dangers in certain weather conditions. It will directly increase the operation and maintenance cost of the line and affect the safe and stable operation of the line.

Contents of the invention

In order to solve the galloping problem caused by the increase of large-span transmission lines and the complex meteorological environment in the current power grid construction, the utility model provides a double-spring end vibration-absorbing type interphase spacer, which can suppress the vibration of the sub-gap at the same time Quickly release the self-excited oscillation energy of the line to ensure the safe and stable operation of the power system and reduce operation and maintenance costs.

In order to achieve the above object, the utility model takes the following technical solutions:

A double-spring-end vibration-absorbing type interphase spacer, including an interphase spacer insulator; the two ends of the interphase spacer insulator are respectively connected with a sleeve type spring damper a and a sleeve type spring damper b; the sleeve type The other ends of the spring shock absorber a and the sleeve type spring shock absorber b are respectively connected to the wire clamp gland through connecting fittings.

The sleeve-type spring damper a and the sleeve-type spring damper b with the same structure; its exterior is connected with the seal plate of the damper through a sealing rubber ring in the anti-fouling sleeve of the damper, Both the antifouling sleeve of the shock absorber and the sealing pressure plate of the shock absorber are fastened to the connecting hardware.

Its interior is set on two positioning damping guide rods by a vibration damping spring. The vibration spring baffles are connected, and the other ends of the two vibration damping spring baffles are connected to the shock absorber sealing pressure plate.

The radius of the positioning damping guide rod is smaller than the inner diameter of the vibration-absorbing damping spring.

The above-mentioned clamp gland is connected with the single ear structure of the clamp hardware on the connecting hardware through the two-ear structure of the clamp gland on it, and through the shock absorber bolt pin and the shock absorber fastening bolt The female is tightly connected.

The said clamp gland is connected with the wires of the transmission line through two sets of clamp fastening bolt pins and clamp fastening bolt nuts.

The utility model is a double-spring end vibration-absorbing type interphase spacer, which adopts a double-vibration-elimination spring end buffer structure. It consists of two sleeve-type spring dampers that can suppress sub-gauge oscillation and release line galloping energy, an interphase spacer insulator, two sets of clamps, and two sets of bolts and pins. Among them, the working stroke of the vibration-absorbing damping spring in the sleeve provides a way for energy release, and the two sleeve-type spring dampers are located between the head and end of the interphase spacer insulator and the clamp, which can absorb and absorb energy at the first time. The biggest feature of the utility model is to reduce the self-excited oscillation energy on the line, minimize the galloping energy transmitted along the interphase spacers, and avoid further bending of the line caused by the increase of the amplitude. The vibration-absorbing structure at the end of the double springs has a significant effect on preventing the galloping of the ice-covered line and suppressing the sub-gap oscillation of the line. Combined with the characteristics of low cost, easy installation, and free operation and maintenance, the utility model has a wide application prospect.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is the front view structural representation of the utility model;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is a sectional view of the vibration damping device in the present invention.

In the figure: sleeve type spring damper a1, sleeve type spring damper b2, wire clamp gland 3, wire clamp fastening bolt pin 4, wire clamp fastening bolt nut 5, shock absorber bolt pin 6, Vibration absorber fastening bolt nut 7, connecting fittings 8, interphase spacer insulators 9, wire clamp gland double ear structure 10, wire clamp fittings single ear structure 11, vibration damping spring 12, positioning damping guide rod 13, vibration damping Spring baffle plate 14, shock absorber sealing pressure plate 15, shock absorber antifouling sleeve 16, sealing rubber ring 17.

Detailed ways

As shown in Figure 1-Figure 4, a double-spring end vibration-absorbing type interphase spacer includes a sleeve-type spring damper a 1, a sleeve-type spring damper b 2, and an interphase spacer insulator 9 , Two sets of clamp glands 3, two sets of clamp fastening bolt pins 4 and clamp fastening bolt nuts 5, two sets of shock absorber bolt pins 6 and shock absorber fastening bolt nuts 7. The two ends of the interphase spacer insulator 9 are respectively connected to the sleeve type spring damper a1 and the sleeve type spring damper b2; the other ends of the sleeve type spring damper a1 and the sleeve type spring damper b2 are respectively It is connected with the clamp cover 3 through the connecting fitting 8 .

The internal structure of the sleeve type spring damper a1 and the sleeve type spring damper b2 is the same; its structure is composed of a vibration damping spring 12, two positioning damping guides whose radii are smaller than the inner diameter of the vibration damping spring 12 Rod 13, a damping spring baffle plate 14 to prevent the damping spring 12 from being overstressed; a damper antifouling sleeve 16 that is buckled with the connecting hardware 8, and a damper antifouling sleeve 16 of a size Conform to, and fasten to the shock absorber sealing pressure plate 15 connecting the hardware 8; a sealing rubber ring 17 located between the vibration absorber anti-fouling sleeve 16 and the vibration absorber sealing pressure plate 15 constitutes. Wherein the sealing rubber ring 17 cooperates with the shock absorber sealing plate 15 to effectively prevent moisture and dirt from entering the sleeve type spring damper a1 and the sleeve type spring damper b2, preventing the vibration damping spring 12 from rusting and failing.

The outside of the sleeve-type spring damper a1 and the sleeve-type spring damper b2 are connected in the anti-fouling sleeve 16 of the damper with the sealing plate 15 of the damper through the sealing rubber ring 17, and the damper is anti-fouling. Dirty sleeve 16 and shock absorber sealing plate 15 are all buckled on connecting fittings 8; the interior is formed by one end of vibration damping spring 12 and vibration absorber antifouling sleeve 16 fixedly connected with positioning damping guide rod 13. The inner wall is connected, and the vibration damping spring 12 is sleeved on the two positioning damping guide rods 13; The damping spring baffle 14 is connected, and the other end of the damping spring baffle 14 is connected with the sealing pressure plate 15 of the damper.

In the utility model, when installing a double-spring-end vibration-eliminating type interphase spacer, the wire clamp cover 3 cooperates with the wire clamp fastening bolt pin 4 and the wire clamp fastening bolt nut 5, and the wire clamp is first fixed on the transmission line conductor. , and then connect the double-ear structure 10 of the clamp gland to the single-ear structure 11 of the clamp fitting 8 connecting the fittings 8, and fasten it with the shock absorber bolt pin 6 and the shock absorber fastening bolt nut 7.

One end of the vibration damping spring 12 is connected to the inner wall of the anti-pollution sleeve 16 of the vibration absorber fixed with the positioning damping guide rod 13; When the vibration-absorbing damping spring 12 is not stressed, the vibration-absorbing spring baffle 14 is located in the lower part of the overall middle of the sleeve type spring damper a1. When the line is stressed by external factors, the sleeve spring shock absorber a 1 located at the end of the cable clamp will release the energy through the positioning damping guide rod 13 and the vibration damping spring 12 at the first time, cutting the line from the initial position. The self-excited oscillation energy reduces the propagation of galloping energy and avoids further force bending of the line caused by the increase of the amplitude.

Finally, it should be noted that: the above-mentioned embodiments are only used to illustrate the technical solution of the utility model and not to limit it, and any other changes or other equivalent replacement methods that do not deviate from the technical solution of the utility model are included in Within the protection scope of the present utility model.

Claims (5)

1. A double spring end vibration-absorbing type interphase spacer, including an interphase spacer insulator (9), characterized in that: the two ends of the interphase spacer insulator (9) are respectively connected to a sleeve type spring vibration absorber a ( 1) and sleeve type spring damper b (2); the other ends of sleeve type spring damper a (1) and sleeve type spring damper b (2) are respectively connected by connecting fittings (8) and wires The clamp cover (3) is connected. 2. A double-spring end vibration-absorbing type spacer bar according to claim 1, characterized in that: the sleeve-type spring damper a (1) and the sleeve-type spring damper with the same structure device b(2); Its exterior is connected with the sealing pressure plate (15) of the shock absorber through the sealing rubber ring (17) in the antifouling sleeve (16) of the shock absorber, and the antifouling sleeve (16) of the shock absorber is sealed with the shock absorber The pressure plates (15) are all buckled on the connecting fittings (8); Its interior is set on two positioning damping guide rods (13) by the vibration damping spring (12), and the two ends of the positioning damping guide rod (13) are respectively connected with the inner wall of the antifouling sleeve (16) of the vibration absorber; The two ends of the damping spring (12) are respectively connected with the two damping spring baffles (14), and the other ends of the two damping spring baffles (14) are connected with the damper sealing pressure plate (15). 3. The double-spring end vibration-absorbing spacer bar according to claim 1, characterized in that: the radius of the positioning damping guide rod (13) is smaller than the inner diameter of the vibration-absorbing damping spring (12). 4. A double-spring-end vibration-absorbing type interphase spacer according to claim 1, characterized in that: said clamp gland (3) is through the two ears of the clamp gland on it The structure (10) is connected with the single ear structure (11) of the wire clip fitting on the connecting fitting (8), and is fastened and connected through the shock absorber bolt pin (6) and the shock absorber fastening bolt nut (7). 5. A double spring end vibration-absorbing type spacer bar according to claim 1, characterized in that: said clamp gland (3) is fastened by two sets of clamp bolts and pins ( 4) It is connected with the clamp fastening bolt nut (5) and the transmission line conductor.