CN109467769B

CN109467769B - Tension insulator gap bridge

Info

Publication number: CN109467769B
Application number: CN201811435361.3A
Authority: CN
Inventors: 韩庆军; 徐嘉明; 史宏伟; 贵童; 魏小宁; 段学福; 刘继怀
Original assignee: Zhoukou Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Zhoukou Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2023-04-28
Anticipated expiration: 2038-11-28
Also published as: CN109467769A

Abstract

The utility model discloses a tension insulator bridge, which comprises two cross beams which are horizontally arranged, wherein the cross beams are of hollow structures, a pedal beam pipe is arranged in the middle of each cross beam, a grounding wire is arranged in one cross beam, two ends of the grounding wire are respectively led out from a first through hole and a second through hole at two ends of the cross beam, a copper wire nose is arranged at one end of the grounding wire led out from the first through hole, a grounding end clamp is arranged at one end of the grounding wire led out from the second through hole, a wire side hook is arranged at one end, close to the copper wire nose, of the cross beam, and two steel wire rope sleeves are arranged at one end, far away from the copper wire nose, of the cross beam. The device is reasonable in design, simple in structure, easy to operate, safe, reliable, small in size and light in weight, and can always keep the original horizontal state of the insulator string in the operation process, so that the safety, stability and reliability in the operation process are ensured.

Description

Tension insulator gap bridge

Technical Field

The utility model relates to the technical field of electric power overhaul, in particular to a tension insulator gap bridge.

Background

Since the operation of the silicon rubber composite insulator in the Henan province power grid in 1989, the product has been applied to the external insulation configuration mode of the operation of the whole power grid in a combined mode from local application to the outside insulation configuration mode of the whole power grid in the Henan province in 2014, the whole combined power transmission line is completely realized, 36 ten thousand silicon rubber composite insulators are hung on the grid for operation, and the product has the characteristics of light weight, high strength, difficult breaking, strong pollution flashover resistance, convenient manufacturing, installation and maintenance and the like, so that the manpower resource and the maintenance cost are greatly saved, and the product becomes the main component of the external insulation configuration of the Henan province power grid. However, in the use process, due to the combined action of a high-voltage electric field, a high Wen Rizhao, a severe weather environment, acid rain and other factors, the umbrella skirt of the composite insulator gradually ages and shows the phenomenon of hydrophobicity degradation along with the time. Degradation of the hydrophobic property will seriously affect the insulating property of the composite insulator, and increase the probability of flashover, so that the unqualified composite insulator string needs to be overhauled and maintained.

According to regulations, the composite insulator cannot be climbed in the processes of installation, maintenance and detection test, so that the insulator is prevented from being damaged artificially. The existing overhaul tools and instruments are complex in operation, complex in structure and single in function, cannot meet the requirements of overhaul of various power transmission line towers, and cannot meet the requirements in different states such as operation maintenance, replacement, technical transformation and defect treatment.

Chinese patent document (bulletin number CN 201868790U) discloses an insulating bridge for electric power line maintenance, including the main part of crossing a bridge, the main part of crossing a bridge comprises insulating material, and the pole tower cross arm hook is established to main part one end of crossing a bridge, and the main part other end of crossing a bridge is equipped with the couple, and the main part of crossing a bridge comprises interior box and outer box, and outer box cover is located interior box periphery, and outer box one end is equipped with pole tower cross arm hook through the cuff, is equipped with rotatable round pin axle between pole tower cross arm hook and the cuff, and interior box one end is equipped with the couple through the cuff, is equipped with rotatable round pin axle between cuff and the couple, and interior box periphery is located to outer box other end cover. But the utility model does not provide a ground wire and a guard.

Chinese patent document (bulletin number CN 201146346Y) discloses a portable insulator overhauling gap bridge, comprising a gap bridge main body, wherein: the gap bridge main body is made of a high-strength insulating material; the tail end of the bridge main body is connected with a tower cross arm fixing device through a second reinforcing hoop so as to be connected with an insulator tower cross arm conveniently; the head end of the bridge main body is connected with a hook through a first reinforcing hoop, and the hook can be hung at the front end of the insulator; the bridge main body is provided with a telescopic part which is sleeved in the bridge main body and can be stretched or retracted as required; an adjusting pin is arranged between the gap bridge main body and the telescopic part. The hook is a conductor, and no grounding wire is arranged, so that potential safety hazards are caused.

Disclosure of Invention

In view of the above, the utility model aims to overcome the defects of the prior art and provide a tension insulator bridge, which has the advantages of reasonable design, simple structure, easy operation, safety, reliability, small volume and light weight, and can always maintain the original horizontal state of an insulator string in the operation process, thereby ensuring the safety, stability and reliability in the operation process.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a strain insulator gap bridge, includes two crossbeams that the level set up, the crossbeam is hollow structure, set up the pedal beam tube in the middle of the crossbeam, set up the earth connection in one crossbeam, the earth connection both ends are drawn forth from the through-hole one and the through-hole two at crossbeam both ends respectively, the earth connection is followed one end that draws forth in the through-hole one sets up the copper wire nose, follow one end that draws forth in the through-hole two sets up the earth connection card, the crossbeam is close to copper wire nose one end sets up wire side couple, the crossbeam is kept away from copper wire nose one end sets up two wire rope loops.

Further, the pedal Liang Guanna is provided with an M12 wire, the M12 wire penetrates through two ends of the cross beam and is fixed through bolts, and an iron pad and a rubber pad are sequentially arranged at the contact position of the M12 wire and the cross beam from outside to inside.

Further, two flat irons are fixed at the tail end of the wire side hook, and the flat irons are fixed on the cross beam through M12 wires.

Further, flat copper is fixed on the inner side of the wire side hook, and the flat copper is connected with the copper wire nose.

Further, the steel wire rope sleeve comprises a pipe hoop and a long steel wire rope fixed on the pipe hoop, and a rope sleeve elongation ring is arranged at the top end of the long steel wire rope.

Further, the rubber pad is prepared from the following raw materials in parts by weight: 38-45 parts of nitrile rubber, 30-35 parts of ethylene propylene diene monomer rubber, 5-8 parts of silicone rubber, 3-8 parts of EVA emulsion, 3-6 parts of palmitic acid, 2-5 parts of magnesium oxide, 1-3 parts of stearic acid, 2-5 parts of aluminum borate whisker, 1-2 parts of nano hydrotalcite, 2-5 parts of diatomite, 6-10 parts of white carbon black, 2-4 parts of vulcanizing agent, 3-5 parts of rosin, 2-5 parts of microcrystalline wax and 2-4 parts of anti-aging agent.

The beneficial effects of the utility model are as follows:

1. the utility model discloses a tension insulator bridge, wherein a cross beam and a pedal beam pipe are made of epoxy resin, the safety is high, and a grounding wire is arranged in the cross beam, so that the grounding state during operation can be realized, and induced electricity is prevented from injuring people.

When the insulator string is used, the wire side hook is hung on a wire, and the steel wire rope sleeve is fixed on the cross arm, so that the insulator string is kept horizontal, and the original horizontal state of the insulator string can be kept all the time.

2. The contact part of the M12 wire and the cross beam is sequentially provided with the iron pad and the rubber pad from outside to inside, so that the cross beam can be protected, and the service life of the utility model is prolonged.

The wire side hook is formed by bending a whole steel bar, and the hook tail bifurcation is connected with an M12 wire of the ladder beam through flat iron; the pipe hoop is connected with the long steel wire rope through two M8 x 20 bolts, and the pipe hoop has a simple integral structure, is low in cost and is convenient to implement.

3. In the specific use, still use with the cooperation of dinima material wire protection rope, prevent that the wire from taking off and running, have the guard action.

4. The utility model improves the material of the rubber pad, and can greatly increase the protection effect of the rubber pad on the cross beam, thereby prolonging the service life of the rubber pad. The rubber pad is prepared by mixing nitrile rubber, ethylene propylene diene monomer rubber and silicone rubber, wherein the nitrile rubber has better oil resistance, wear resistance and heat resistance and strong adhesive force, but has low elasticity; the rubber is blended with ethylene propylene diene monomer rubber and silicone rubber, so that the elasticity of the product can be improved, the shockproof, wear-resistant and ageing-resistant performances are increased, and a small amount of EVA emulsion (the content of vinyl acetate is 20-25%) is added during mixing so as to improve the toughness and impact resistance of the rubber.

Stearic acid and magnesium oxide are used as activators, so that the crosslinking degree, heat resistance and ageing resistance of the rubber are improved; aluminum borate whisker, nano hydrotalcite, diatomite and white carbon black are also added as reinforcing materials, wherein the diameter of the aluminum borate whisker is 0.5-1 mu m, the length of the aluminum borate whisker is 5-10 mu m, and the aluminum borate whisker is distributed in rubber, so that the crosslinking density and the strength of the rubber can be increased, and the mechanical property of the rubber is increased; the particle size of the nano hydrotalcite is 10-50nm, and the nano hydrotalcite is uniformly dispersed in the rubber, so that the interaction between the nano hydrotalcite and a rubber cross-linked network can be effectively enhanced, and the mechanical strength of the rubber is improved. In addition, the diatomite has large specific surface area, so that the wear resistance of the product can be improved, and the white carbon black with high activity can be combined with rubber in a crosslinking way, so that the strength of the rubber is improved.

Rosin and microcrystalline wax can migrate to the surface of rubber during rubber mixing to form a protective film, so that the ageing resistance of the rubber can be enhanced.

5. The utility model has reasonable structural design, simple structure, easy operation, safety, reliability, small volume and light weight, can always keep the original horizontal state of the insulator string in the operation process, ensures the safety, stability and reliability in the operation process, can simplify the operation flow, improves the construction efficiency, and completely accords with the quality standard specified by the DL/T741-2001 overhead line operation regulations and the electric power safety working regulations.

Drawings

Fig. 1 is a schematic structural diagram of a tension insulator bridge according to embodiment 1 of the present utility model;

FIG. 2 is an enlarged view of a portion of the pedal beam tube of FIG. 1;

FIG. 3 is an enlarged view of a portion of the wire side hook of FIG. 1;

fig. 4 is a schematic structural view of a wire rope sling according to embodiment 2 of the present utility model.

In the figure: the cable comprises a 1-cross beam, a 2-pedal beam pipe, a 3-M12 wire, a 4-iron pad, a 5-rubber pad, a 6-grounding wire, a 7-through hole I, an 8-copper wire nose, a 9-through hole II, a 10-grounding end clamp, an 11-wire side hook, a 12-rope sleeve elongation ring, a 13-flat iron, a 14-flat copper, a 15-wire rope sleeve, a 16-pipe hoop and a 17-long wire rope.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Example 1

As shown in fig. 1-3, the tension insulator bridge comprises two horizontal beams 1, wherein the beams 1 are of hollow structures, 5 pedal beam pipes 2 are arranged in the middle of the beams 1, and the beams 1 and the pedal beam pipes 2 are made of epoxy resin materials; the M12 wire 3 is arranged in the pedal beam tube 2 in a penetrating way, namely, the M12 wire 3 is in threaded connection with the pedal beam tube 2, and the two ends of the M12 wire penetrating through the cross beam 1 are all fixed through bolts, so that the pedal beam tube 2 is fixed on the cross beam 1, and an iron pad 4 and a rubber pad 5 are sequentially arranged at the contact part of the M12 wire 3 and the cross beam 1 from outside to inside and used for protecting the cross beam 1.

The grounding wire 6 is arranged in one beam 1, two ends of the grounding wire 6 are respectively led out from a first through hole 7 and a second through hole 9 at two ends of the beam 1, wherein the first through hole 7 is 100mm away from the near end of the beam 1, the second through hole 9 is 500mm away from the near end of the beam 1, a copper wire nose 8 is arranged at one end of the grounding wire 6 led out from the first through hole 7, and a grounding end clamp 10 is arranged at one end led out from the second through hole 9.

The end, close to the copper wire nose 8, of the cross beam 1 is provided with a wire side hook 11, the wire side hook 11 is formed by bending an entire phi 10 steel bar, the tail end of the wire side hook 11 is welded with two flat irons 13, through holes are formed in the flat irons 13, and M12 wires penetrate through the through holes to fix the flat irons 13 on the cross beam 1; the flat copper 14 is fixed on the inner side of the wire side hook 11, and the flat copper 14 is connected with the copper wire nose 8.

Two steel wire rope sleeves 15 are arranged at one end of the cross beam 1 far away from the copper wire nose 8 and are used for fixing the left end of the utility model on the cross arm; in addition, the utility model also uses the wire protection rope made of the Dinima material in a matching way, thereby increasing the protection effect.

When the tension insulator bridge of the utility model is adopted, the concrete using method is as follows: the grounding end clamp 10 led out from the left grounding wire 6 is firmly clamped on the cross arm, the Dinima wire protection rope is firstly hung on the right side of the ladder beam, two people stand on the cross arm at the same time to operate the tension insulator bridge crossing device, one person holds the left side of the ladder beam, the other person controls the Dinima wire protection rope (plays a control role when the bridge is hung) to control the bridge crossing direction and the horizontal state, and the two persons cooperate together to hang the insulator bridge crossing wire side hook 11 on the wire. At this time, the wire is connected to the cross arm of the iron tower through the ground wire 6 by the copper-on-the-shoulder 14 at the inner side of the wire side hook 11, so that good grounding is realized, induced electricity can be avoided, and finally the left end of the iron tower is fixed on the cross arm through the steel wire rope sleeve 15, so that the iron tower is kept in a horizontal state. Then, one person moves to the right side along the utility model, and the Dinima wire protection rope is hung on the yoke plate (the yoke plate is a fitting for connecting the insulator and the wire) (insulator, yoke plate and wire), and the other person hangs the Dinima wire protection rope on the cross arm to prevent the wire from running off, thereby playing a protection role.

Example 2

Example 2 differs from example 1 in that: as shown in fig. 4, the steel wire rope sleeve 15 comprises a pipe hoop 16 and a 1300mm long steel wire rope 17 fixed on the pipe hoop, the pipe hoop 16 is connected with the 1300mm long steel wire rope through two M8 x 20 bolts, and a rope sleeve elongation ring 12 is arranged at the top end of the long steel wire rope 17.

The rubber pad 5 in the embodiment is prepared from the following raw materials in parts by weight: 38 parts of nitrile rubber, 35 parts of ethylene propylene diene monomer rubber, 5 parts of silicone rubber, 8 parts of EVA emulsion, 3 parts of palmitic acid, 5 parts of magnesium oxide, 1 part of stearic acid, 5 parts of aluminum borate whisker, 1 part of nano hydrotalcite, 2 parts of diatomite, 10 parts of white carbon black, 2 parts of vulcanizing agent, 5 parts of rosin, 2 parts of microcrystalline wax and 2 parts of anti-aging agent. Wherein the vulcanizing agent is sulfur, and the anti-aging agent is an anti-aging agent MB.

The rubber pad is prepared by the following steps:

(1) The palmitic acid, the aluminum borate whisker, the nano hydrotalcite, the diatomite and the white carbon black are stirred at a high speed for 20min to obtain a premix, namely, the aluminum borate whisker, the nano hydrotalcite, the diatomite and the white carbon black are premixed with the palmitic acid, so that the compatibility of the inorganic components and rubber is improved; (2) Adding nitrile rubber, ethylene propylene diene monomer rubber, silicone rubber, EVA emulsion, magnesium oxide and stearic acid into an internal mixer, plasticating for 3min, adding an anti-aging agent, mixing for 3min, and adding premix, mixing for 5min to obtain a mixing material, wherein the mixing temperature is 120 ℃; (2) Adding rosin and microcrystalline wax into a mixing material in an open mill, carrying out heat refining for 5min, then adding a vulcanizing agent, carrying out heat refining for 5min, carrying out thin pass for 5 times, and discharging tablets, wherein the heat refining temperature is 80 ℃; and (3) vulcanizing and molding the film on a vulcanizing agent to obtain a product.

Example 3

Example 3 differs from example 2 in that: the rubber pad 5 is prepared from the following raw materials in parts by weight: 39 parts of nitrile rubber, 33 parts of ethylene propylene diene monomer rubber, 6 parts of silicone rubber, 7 parts of EVA emulsion, 4 parts of palmitic acid, 4 parts of magnesium oxide, 1.5 parts of stearic acid, 4 parts of aluminum borate whisker, 1.2 parts of nano hydrotalcite, 3 parts of diatomite, 9 parts of white carbon black, 2.5 parts of vulcanizing agent, 4.5 parts of rosin, 3 parts of microcrystalline wax and 2.5 parts of anti-aging agent.

Example 4

Example 4 differs from example 2 in that: the rubber pad 5 is prepared from the following raw materials in parts by weight: 40 parts of nitrile rubber, 32 parts of ethylene propylene diene monomer rubber, 6 parts of silicone rubber, 6 parts of EVA emulsion, 5 parts of palmitic acid, 3 parts of magnesium oxide, 2 parts of stearic acid, 3 parts of aluminum borate whisker, 1.5 parts of nano hydrotalcite, 4 parts of diatomite, 8 parts of white carbon black, 3 parts of vulcanizing agent, 4 parts of rosin, 4 parts of microcrystalline wax and 3 parts of anti-aging agent.

Example 5

Example 5 differs from example 2 in that: the rubber pad 5 is prepared from the following raw materials in parts by weight: 42 parts of nitrile rubber, 31 parts of ethylene propylene diene monomer rubber, 7 parts of silicone rubber, 5 parts of EVA emulsion, 5 parts of palmitic acid, 2 parts of magnesium oxide, 2.5 parts of stearic acid, 3 parts of aluminum borate whisker, 1.8 parts of nano hydrotalcite, 4 parts of diatomite, 7 parts of white carbon black, 3.5 parts of vulcanizing agent, 3.5 parts of rosin, 5 parts of microcrystalline wax and 3.5 parts of anti-aging agent.

Example 6

Example 6 differs from example 2 in that: the rubber pad 5 is prepared from the following raw materials in parts by weight: 45 parts of nitrile rubber, 30 parts of ethylene propylene diene monomer rubber, 8 parts of silicone rubber, 3 parts of EVA emulsion, 6 parts of palmitic acid, 2 parts of magnesium oxide, 3 parts of stearic acid, 2 parts of aluminum borate whisker, 2 parts of nano hydrotalcite, 5 parts of diatomite, 6 parts of white carbon black, 4 parts of vulcanizing agent, 3 parts of rosin, 4 parts of microcrystalline wax and 4 parts of anti-aging agent.

Performance detection

The physical properties of the products prepared in examples 2-6 were tested, wherein tensile properties were measured according to GB/T528-2009 and abrasion resistance was characterized by the Aldrich abrasion value, and the test results are shown in Table 1.

Table 1 performance test data

The tensile strength of the products prepared in the examples 2-6 is 24-32MPa, the elongation at break is 510-600%, and the abrasion resistance and wear resistance are 0.08-0.15cm ³ After hot air at 150 ℃ for 500 hours, the tensile elongation and the tensile strength change are less, which indicates that the rubber pad product prepared by the method has excellent wear resistance and ageing resistance and good mechanical property, and the protection effect of the rubber pad on the cross beam can be increased or decreased, so that the service life of the rubber pad is prolonged.

Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.

Claims

1. The utility model provides a strain insulator gap bridge which characterized in that: the novel wire rope winding device comprises two horizontal beams (1), wherein the two horizontal beams (1) are of hollow structures, a pedal beam pipe (2) is arranged in the middle of each horizontal beam (1), a grounding wire (6) is arranged in each horizontal beam (1), two ends of each grounding wire (6) are respectively led out from a first through hole (7) and a second through hole (9) at two ends of each horizontal beam (1), a copper wire nose (8) is arranged at one end of each grounding wire (6) led out from the first through hole (7), a grounding end clamp (10) is arranged at one end of each grounding wire (6) led out from the second through hole (9), a wire side hook (11) is arranged at one end, close to the copper wire nose (8), of each horizontal beam (1), and two wire rope loops (15) are arranged at one end, far away from the copper wire nose (8);

an M12 wire (3) is arranged in the pedal beam pipe (2), the M12 wire (3) penetrates through two ends of the cross beam (1) and is fixed through bolts, and an iron pad (4) and a rubber pad (5) are sequentially arranged at the contact position of the M12 wire (3) and the cross beam (1) from outside to inside;

two flat irons (13) are fixed at the tail end of the wire side hook (11), and the flat irons (13) are fixed on the cross beam (1) through M12 wires (3);

a flat copper (14) is fixed on the inner side of the wire side hook (11), and the flat copper (14) is connected with the copper wire nose (8);

the rubber pad (5) is prepared from the following raw materials in parts by weight: 38-45 parts of nitrile rubber, 30-35 parts of ethylene propylene diene monomer rubber, 5-8 parts of silicone rubber, 3-8 parts of EVA emulsion, 3-6 parts of palmitic acid, 2-5 parts of magnesium oxide, 1-3 parts of stearic acid, 2-5 parts of aluminum borate whisker, 1-2 parts of nano hydrotalcite, 2-5 parts of diatomite, 6-10 parts of white carbon black, 2-4 parts of vulcanizing agent, 3-5 parts of rosin, 2-5 parts of microcrystalline wax and 2-4 parts of anti-aging agent.

2. The tension insulator bridge of claim 1, wherein: the steel wire rope sleeve (15) comprises a pipe hoop (16) and a long steel wire rope (17) fixed on the pipe hoop, and a rope sleeve elongation ring (12) is arranged at the top end of the long steel wire rope (17).