CN112448179A - Lead clamping device for lightning arrester - Google Patents
Lead clamping device for lightning arrester Download PDFInfo
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- CN112448179A CN112448179A CN202011119741.3A CN202011119741A CN112448179A CN 112448179 A CN112448179 A CN 112448179A CN 202011119741 A CN202011119741 A CN 202011119741A CN 112448179 A CN112448179 A CN 112448179A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
- H01R4/2406—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation having needles or pins
Abstract
The invention discloses a lead clamping device for a lightning arrester, which relates to the technical field of auxiliary devices of power equipment and comprises a lead clamping main body and a line pressing body, wherein the lead clamping main body comprises a main body clamping section, a main body puncture section and a lightning arrester connecting section which are sequentially connected; the main body clamping section comprises a main body clamping part and main body clamping covering parts arranged on two sides, and the main body puncturing section comprises a main body puncturing part and main body puncturing covering parts arranged on two sides; the line pressing body comprises a line pressing body clamping section and a line pressing body puncturing section which are sequentially connected, the line pressing body clamping section comprises a line pressing body clamping part and line pressing body clamping cover closing parts arranged on two sides, and the line pressing body puncturing section comprises a line pressing body puncturing part and line pressing body puncturing cover closing parts arranged on two sides; the main body puncture part and the line pressing body puncture part are internally provided with punctures; the invention connects the lead wire by a puncture mode, thereby avoiding the phenomena of heating, strand breaking and wire breaking caused by the reduction of mechanical strength due to the fact that the lead wire needs to strip the insulating layer.
Description
Technical Field
The invention relates to the technical field of auxiliary devices of power equipment, in particular to a lead clamping device for a lightning arrester.
Background
Because the electric power plays an important role in promoting the national economy and social development and the influence degree on the lives of people is increasingly enhanced, the safe and reliable operation of electric power equipment is especially important to guarantee. In an electric power system, a lightning arrester is generally adopted to protect various electrical equipment from damage caused by lightning overvoltage, operation overvoltage and power frequency transient overvoltage impact. The existing lightning arrester lead wire usually adopts an insulated wire, the insulated wire has higher mechanical strength under the condition that an insulating layer exists, however, the mechanical strength of a bare wire is relatively lower after the insulating layer is stripped, and an internal metal wire is easily scratched during stripping, so that the mechanical strength of the stripped part is further reduced.
For example, a "locomotive fully-sealed arrester" disclosed in chinese patent literature, whose publication number is CN207441374U, discloses a locomotive fully-sealed arrester, which includes an arrester body, a lead post at a lead-in end and a lead post at a lead-out end, wherein both ends of the arrester body are respectively provided with an upper electrode and a lower electrode, one end of the lead post at the lead-in end is connected with a high-voltage end lead of an electric locomotive, and the other end is fixedly connected with the upper electrode, one end of the lead post at the lead-out end is connected with the lower electrode lead, and the other end is connected with a ground terminal lead of the electric locomotive, the lower end of the arrester body is provided with a mounting flange connected with the locomotive, the lead post at the lead-out end is fixed on the mounting flange, the outer side of the lead post at the lead-in end is provided with a lead sleeve, the outer. However, the utility model discloses an adopt copper binding post and the end bolted connection of being qualified for the next round of competitions during the connection lead wire, very easily cause the bare conductor part of arrester lead wire to be crooked excessive when the construction or after long-term operation, lead to generating heat, disconnected strand, until the broken string, seriously influence the normal work of arrester.
Disclosure of Invention
The invention provides a lead clamping device for an arrester, aiming at solving the problems that the connection mode of the existing arrester and a lead is that a connecting end of a copper wiring terminal is fixed with the arrester through a bolt mode, but the bare wire part of the lead of the arrester is easy to be excessively bent during construction or after long-term operation, so that the heating, strand breaking and wire breaking are caused, the normal work of the arrester is seriously influenced, and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lead clamping device for a lightning arrester comprises a lead clamping main body and a line pressing body, wherein the lead clamping main body comprises a main body clamping section, a main body puncture section and a lightning arrester connecting section which are sequentially connected; the main body clamping section comprises a main body clamping part and main body clamping covering parts arranged on two sides, and the main body puncturing section comprises a main body puncturing part and main body puncturing covering parts arranged on two sides; the line pressing body comprises a line pressing body clamping section and a line pressing body puncturing section which are sequentially connected, the line pressing body clamping section comprises a line pressing body clamping part and line pressing body clamping cover closing parts arranged on two sides, and the line pressing body puncturing section comprises a line pressing body puncturing part and line pressing body puncturing cover closing parts arranged on two sides; the utility model discloses a line ball body piercing press, including main part clamping part and line ball body clamping part, line ball body piercing part and line ball body piercing part, the main part clamping part is equipped with the centre gripping pad with line ball body clamping part inner wall, be equipped with the puncture in main part piercing part and the line ball body piercing part, line ball body centre gripping lid closes the portion and is equipped with the lid in the portion that closes with line ball body piercing cover and closes the clamp, main part clamping part and main part piercing cover are closed and are equipped with.
The lead clamping device comprises a clamping main body and a lead pressing body, and when the lead clamping device is used, compared with the prior art that an insulating layer needs to be stripped from a lead, and then a copper wiring terminal connecting end and a lightning arrester are fixed in a bolt mode, the lead clamping device does not need to be stripped, but is directly embedded into a main body clamping part and a main body puncture part in the lead clamping main body, then a covering clamp is aligned to a covering opening, and the lead pressing body is covered, at the moment, the main body clamping part and the lead pressing body clamping part are mutually covered and closed, so that the lead can be firmly clamped, and meanwhile, the insulating layer of the lead can be punctured by the puncture arranged in the main body puncture part and the lead pressing body puncture part and is communicated with a metal lead circuit inside. After the clamping device clamps the lead, the connecting section of the lightning arrester is connected with the lightning arrester, so that the lead is communicated with the lightning arrester. The invention connects the lead wire by a puncture mode, avoids the phenomena of heating, strand breaking and wire breaking caused by the reduction of mechanical strength due to the fact that the insulating layer of the lead wire needs to be stripped, and has simple structure and easy carrying and operation.
Preferably, the main body clamping part, the main body puncturing part, the wire pressing body clamping part and the wire pressing body puncturing part are of semicircular structures matched with each other.
The semicircular structure can better match the shape of the lead.
Preferably, the lightning arrester connecting section is a cylindrical structure with the bottom arranged in a notch, and the surface of the notch is provided with threads.
When the lightning arrester is connected with the lead clamping device through the lightning arrester connecting section, the lightning arrester can be connected with a notch bolt with threads at the bottom of the lightning arrester connecting section through a bolt on the lightning arrester.
Preferably, the diameter of the cylindrical structure of the lightning arrester connecting section is the same as the diameter of the semicircular structures of the main body clamping part, the main body puncture part, the line pressing body clamping part and the line pressing body puncture part.
The diameter of the cylindrical structure of the connecting section of the lightning arrester is the same as the diameter of the semicircular structure of the main body clamping part, the main body puncture part, the wire pressing body clamping part and the wire pressing body puncture part, so that the whole body is more attractive and convenient to carry.
Preferably, the junction of the lightning arrester connecting section and the main body piercing section is a solid connecting section.
The solid connecting section makes the overall strength of the lead clamping device stronger.
Preferably, the covering clamp comprises a covering clamp main body and a covering clamp base, elastic clamping arms are arranged on two sides of the covering clamp main body, and a gap is formed between each elastic clamping arm and the covering clamp main body; the end of the elastic clamping arm is provided with a locking convex part, and a gap is formed between the locking convex part and the covering clamp base.
Preferably, the part of the locking convex part close to the covering clamp base is a plane, and the part far away from the covering clamp base is provided with an inclined surface.
Preferably, the width of the gap is greater than the thickness of the closure.
According to the lead clamping device, when the lead clamping main body and the line pressing body are covered, the covering clamp penetrates through the covering opening, at the moment, the elastic clamping arms arranged on two sides of the covering clamp main body can penetrate through the covering opening, then, the end parts of the elastic clamping arms are provided with the locking convex parts, when the locking convex parts are in contact with the edge of the covering opening, the parts, far away from the covering clamp base, of the locking convex parts are provided with the inclined planes, so that the elastic clamping arms can be retracted towards the covering clamp main body, after the locking convex parts penetrate through the covering opening, the elastic clamping arms rebound, and the parts, close to the covering clamp base, of the locking convex parts are planes, so that the locking covering can be successfully completed at the moment, and when the lead clamping main body and the line pressing body need to be detached, the elastic clamping arms can be manually retracted, and the detachment is completed.
Preferably, the lead clamping main body and the wire pressing body are made of conductive metal, and the outer surfaces of the lead clamping main body (1) and the wire pressing body (2) are coated with a silicon rubber insulating film, wherein the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 70-80 parts of tetraethyl silicate, then adding 10-13wt% hydrochloric acid solution to adjust the pH value to 2-3, stirring at 70-90 ℃ for 3-6h, adding 20-25 parts of polyvinyl alcohol, continuing to keep the temperature for 1-2h, removing the solvent, adding 0.2-0.5 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 100-120 parts of deionized water, adjusting the pH to 10-11 by adopting 15-20wt% ammonia water, stirring at 30-40 ℃ for 5-10h, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dispersing 5-10 parts of hollow silicon dioxide particles into 40-50 parts of toluene, adding 40-60 parts of 1, 6-hexamethylene diisocyanate and 1-2 parts of dibutyltin dilaurate, reacting at 50-60 ℃ for 3-5h, centrifugally drying, dispersing the precipitate into 40-50 parts of toluene, adding 30-40 parts of pentaol triacrylic acid and 1-2 parts of dibutyltin dilaurate, reacting at 50-60 ℃ for 3-5h, centrifugally drying, and preparing modified hollow silicon dioxide particles;
(4) dissolving 5-10 parts of dichlorovinylmethylsilane, 5-10 parts of methylhydrodichlorosilane, 25-30 parts of dimethyldichlorosilane and 10-15 parts of trimethyltrichlorosilane in a mixed solution of 50-60 parts of toluene and 100 parts of water, preserving the heat for 1-3h at 10-15 ℃, adding 2-5 parts of zinc octoate after washing to be neutral, reacting for 3-5h at 140 ℃ of 120-water, and washing to be neutral to obtain the vinyl-containing silicone rubber;
(5) adding the modified hollow silica particles and the platinum catalyst into the vinyl-containing silicon rubber at 50-80 ℃, stirring for 0.5-1h, and curing at 190-250 ℃ to prepare the silicon rubber insulating film.
According to the preparation method, firstly, tetraethyl silicate is used as a silicon source, hydrophobic propyl triethoxysilane is dispersed in tetraethyl silicate and then is matched with polyvinyl alcohol to prepare a precursor liquid, the precursor liquid is hydrophobic and is added into deionized water to form liquid drops, and hollow silica particles are prepared after a cross-linking reaction under an alkaline condition; then, the invention successfully prepares the vinyl-containing silicon rubber containing side chain double bonds and silicon hydrogen bonds by taking chlorosilane monomers as raw materials, and successfully prepares the silicon rubber insulating film after mixing and curing the vinyl-containing silicon rubber and the modified hollow silicon dioxide particles.
In the invention, the prepared hollow silica particles are added into the silicon rubber, so that the electrical insulation performance of the film layer can be improved, however, the team of the invention finds that the hollow silica particles are only added in a blending mode, so that the hollow silica particles are not uniformly dispersed in the silicon rubber film layer, the electrical insulation stability is poor, and meanwhile, the prepared silicon rubber film has poor mechanical property and durability due to poor combination firmness of the hollow silica particles and the silicon rubber film layer. After a large number of experiments, the modified hollow silica particles with the hollow silica particle-isocyanate layer-pentaol triacrylate layer structure are prepared, and are coated by double layers, so that the dispersibility of the hollow silica particles is facilitated, and the electrical insulation stability of the hollow silica particles is improved; the core layer hollow silica particles can increase the electrical insulation performance of the film layer and the mechanical property of the film layer, and then urethane bonds are introduced into the isocyanate layer and can form hydrogen bonds among molecular chains to form a three-dimensional mutual transmission network structure, so that the modified hollow silica particles can be firmly combined with the molecular chains, and the urethane bonds are introduced to form the hydrogen bonds between the silicon rubber insulating film and the base material, so that the adhesive force of the silicon rubber insulating film is greatly increased; and finally, a terminal double bond is introduced into the pentaol triacrylate layer, and the pentaol triacrylate layer can perform a crosslinking reaction with a double bond and a silicon-hydrogen bond in the vinyl-containing silicon rubber, so that a firmer three-dimensional mutual transmission network structure is further formed, and the mechanical property of the silicon rubber insulating film is greatly improved.
Preferably, the mass ratio of the vinyl-containing silicone rubber and the modified hollow silica particles in the step (5) is 10: 1-2.
Therefore, the invention has the following beneficial effects: the invention connects the lead wire by a puncture mode, avoids the phenomena of heating, strand breaking and wire breaking caused by the reduction of mechanical strength due to the fact that the insulating layer of the lead wire needs to be stripped, and has simple structure and easy carrying and operation.
Drawings
Fig. 1 is a schematic view of a lead clamping body according to the present invention.
FIG. 2 is a schematic view of the structure of the wire pressing body of the present invention.
Fig. 3 is a schematic view of the closure clip of the present invention.
Fig. 4 is a schematic structural view of the cover clip after covering.
Fig. 5 is a schematic cross-sectional structure of the main body clamping section of the present invention.
FIG. 6 is a schematic cross-sectional view of a piercing section of the main body of the present invention.
FIG. 7 is a schematic cross-sectional view of the clamping section of the crimping body of the present invention.
Figure 8 is a schematic structural view of the cross section of the puncture section of the crimp body.
In the figure: lead wire centre gripping main part 1, main part centre gripping section 11, main part clamping part 111, main part centre gripping lid closes portion 112, main part puncture section 12, main part puncture portion 121, main part puncture lid closes portion 122, arrester linkage segment 13, notch 131, screw thread 132, solid linkage segment 133, line ball 2, line ball clamping section 21, line ball clamping part 211, line ball clamping lid closes portion 212, line ball puncture section 22, line ball puncture portion 221, line ball puncture lid closes portion 222, puncture 3, lid closes and presss from both sides 4, lid closes and presss from both sides main part 41, lid closes and presss from both sides base 42, elasticity clamping arm 43, locking convex part 44, plane 441, inclined plane 442, clearance 45, space 46, lid closes mouthful 5, clamping pad 6.
Detailed Description
The invention is further described with reference to specific embodiments.
Example 1: as shown in fig. 1-2, a lead clamping device for a lightning arrester comprises a lead clamping main body 1 and a line pressing body 2, wherein the lead clamping main body 1 and the line pressing body 2 are made of conductive metal; the lead clamping main body 1 comprises a main body clamping section 11, a main body puncture section 12 and a lightning arrester connecting section 13 which are connected in sequence; as shown in fig. 5, the main body holding section 11 includes a main body holding portion 111 and main body holding covering portions 112 disposed at two sides, and as shown in fig. 6, the main body puncturing section 12 includes a main body puncturing portion 121 and main body puncturing covering portions 122 disposed at two sides; the wire pressing body 2 comprises a wire pressing body clamping section 21 and a wire pressing body puncturing section 22 which are sequentially connected, as shown in fig. 7, the wire pressing body clamping section 21 comprises a wire pressing body clamping part 211 and wire pressing body clamping covering parts 212 arranged on two sides, as shown in fig. 8, the wire pressing body puncturing section 22 comprises a wire pressing body puncturing part 221 and wire pressing body puncturing covering parts 222 arranged on two sides; the inner walls of the main body clamping part 111 and the line pressing body clamping part 211 are provided with clamping pads 6, and the main body puncture part 121 and the line pressing body puncture part 221 are internally provided with punctures 3; the main body clamping portion 111, the main body puncture portion 121, the line pressing body clamping portion 211 and the line pressing body puncture portion 221 are semicircular structures which are matched with each other, the joint of the lightning arrester connecting section 13 and the main body puncture section 12 is a solid connecting section 133 which is a cylindrical structure with the bottom arranged in a notch 131, threads 132 are arranged on the surface of the notch 131, and the diameter of the cylindrical structure of the lightning arrester connecting section 13 is the same as the diameter of the semicircular structures of the main body clamping portion 111, the main body puncture portion 121, the line pressing body clamping portion 211 and the line pressing body puncture portion 221;
as shown in fig. 3-4, a covering clamp 4 is arranged on the wire pressing body clamping covering part 212 and the wire pressing body puncturing covering part 222, the covering clamp 4 includes a covering clamp main body 41 and a covering clamp base 42, elastic clamping arms 43 are arranged on two sides of the covering clamp main body 41, and a gap 45 is arranged between the elastic clamping arms 43 and the covering clamp main body 41; a locking convex part 44 is arranged at the end part of the elastic clamping arm 43, and a gap 46 is arranged between the locking convex part 44 and the covering clamp base 42; the part of the locking convex part 44 close to the cover clamp base 42 is a plane 441, and the part far away from the cover clamp base 42 is provided with a slope 442; the main body clamping covering part 112 and the main body puncturing covering part 122 are provided with covering openings 5 matched with the covering clamps 4, and the width of the gap 46 is larger than the thickness of the covering openings 5.
When the invention is used, the lead clamping body is firstly embedded into the body clamping part 111 and the body puncture part 121 in the lead clamping body 1, then the covering clamp 4 is aligned with the covering opening 5, the wire pressing body 2 is covered, when the cover is closed, the cover clamp 4 passes through the cover opening 5, at this time, the cover clamp body 41 with the elastic clamping arms 43 arranged at both sides passes through the cover opening 5, and then, since the end of the elastic clamp arm 43 is provided with the locking protrusion 44, when the locking protrusion 44 comes into contact with the edge of the closure 5, because the portion of the locking protrusion 44 away from the cover clip base 42 is provided with the inclined surface 442, the elastic clipping arm 43 will be drawn toward the cover clip body 41, and after the locking protrusion 44 passes through the cover opening 5, the elastic clipping arm 43 will rebound, since the portion of the locking protrusion 44 close to the covering clip base 42 is the flat surface 441, the locking covering can be successfully completed at this time; after the covering is completed, the main body clamping portion 111 and the line pressing body clamping portion 211 are covered with each other to clamp the lead, and meanwhile, the insulation layer of the lead can be pierced through by the puncture 3 arranged in the main body puncture portion 121 and the line pressing body puncture portion 221 and is communicated with the metal wire circuit inside. After the clamping device clamps the lead, the bolt on the lightning arrester is connected with the notch bolt with the thread at the bottom of the lightning arrester connecting section 13, so that the lead is communicated with the lightning arrester; when the lead clamping body 1 and the wire pressing body 2 need to be disassembled, the elastic clamping arm 43 can be manually contracted, so that the disassembly is completed;
the outer surfaces of the lead clamping main body 1 and the wire pressing body 2 are coated with silicon rubber insulating films, and the silicon rubber insulating films comprise the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 75 parts of tetraethyl silicate, then adding 12wt% hydrochloric acid solution to adjust the pH to 2, stirring at 80 ℃ for 5 hours, adding 23 parts of polyvinyl alcohol, continuing to preserve heat for 1.5 hours, removing the solvent, adding 0.3 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 110 parts of deionized water, adjusting the pH to 10.5 by adopting 17wt% ammonia water, stirring at 35 ℃ for 7 hours, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dispersing 7 parts of hollow silica particles into 45 parts of toluene, adding 50 parts of 1, 6-hexamethylene diisocyanate and 1-2 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, centrifugally drying, dispersing the precipitate into 45 parts of toluene, adding 35 parts of pentaol triacrylate and 1.5 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, and centrifugally drying to prepare modified hollow silica particles;
(4) dissolving 7 parts of dichlorovinylmethylsilane, 8 parts of methylhydrodichlorosilane, 28 parts of dimethyldichlorosilane and 12 parts of trimethyltrichlorosilane in a mixed solution of 55 parts of toluene and 110 parts of water, preserving the heat for 2 hours at 13 ℃, washing with water until the mixture is neutral, adding 4 parts of zinc octoate, reacting for 4 hours at 130 ℃, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(5) adding modified hollow silica particles and a platinum catalyst into vinyl-containing silicon rubber at 65 ℃, stirring for 0.8h, and curing at 220 ℃ to prepare a silicon rubber insulating film; the mass ratio of the vinyl-containing silicon rubber to the modified hollow silica particles is 10:1.
Example 2: the difference from the embodiment 1 is that the outer surfaces of the lead clamping main body 1 and the wire pressing body 2 are coated with a silicon rubber insulating film, and the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 70 parts of tetraethyl silicate, then adding 10wt% hydrochloric acid solution to adjust the pH value to 3, stirring at 70 ℃ for 6 hours, adding 20 parts of polyvinyl alcohol, continuing to preserve heat for 2 hours, removing the solvent, adding 0.2 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 100 parts of deionized water, adjusting the pH to 10 by adopting 15wt% ammonia water, stirring at 30 ℃ for 10 hours, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dispersing 5 parts of hollow silica particles into 40 parts of toluene, adding 40 parts of 1, 6-hexamethylene diisocyanate and 2 parts of dibutyltin dilaurate, reacting at 50 ℃ for 3 hours, centrifugally drying, dispersing the precipitate into 40 parts of toluene, adding 30 parts of pentaol triacrylic acid and 1 part of dibutyltin dilaurate, reacting at 50 ℃ for 5 hours, and centrifugally drying to prepare modified hollow silica particles;
(4) dissolving 5 parts of dichlorovinylmethylsilane, 5 parts of methylhydrodichlorosilane, 25 parts of dimethyldichlorosilane and 10 parts of trimethyltrichlorosilane in a mixed solution of 50 parts of toluene and 100 parts of water, preserving the heat at 10 ℃ for 3 hours, washing with water until the mixture is neutral, adding 2 parts of zinc octoate, reacting at 120 ℃ for 5 hours, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(5) adding modified hollow silica particles and a platinum catalyst into vinyl-containing silicon rubber at 50 ℃, stirring for 0.5h, and curing at 190 ℃ to prepare a silicon rubber insulating film; the mass ratio of the vinyl-containing silicon rubber to the modified hollow silica particles is 10: 1.5.
Example 3: the difference from the embodiment 1 is that the outer surfaces of the lead clamping main body 1 and the wire pressing body 2 are coated with a silicon rubber insulating film, and the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 80 parts of tetraethyl silicate, then adding 13wt% hydrochloric acid solution to adjust the pH value to 3, stirring at 90 ℃ for 3 hours, adding 25 parts of polyvinyl alcohol, continuing to preserve heat for 1 hour, removing the solvent, adding 0.5 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 120 parts of deionized water, adjusting the pH to 11 by using 20wt% ammonia water, stirring at 40 ℃ for 5 hours, washing to be neutral, and then centrifuging and drying to prepare hollow silicon dioxide particles;
(3) dispersing 10 parts of hollow silicon dioxide particles into 50 parts of toluene, adding 60 parts of 1, 6-hexamethylene diisocyanate and 2 parts of dibutyltin dilaurate, reacting at 60 ℃ for 3 hours, centrifugally drying, dispersing the precipitate into 50 parts of toluene, adding 40 parts of pentaol triacrylic acid and 2 parts of dibutyltin dilaurate, reacting at 60 ℃ for 3 hours, centrifugally drying, and preparing to obtain modified hollow silicon dioxide particles;
(4) dissolving 10 parts of dichlorovinylmethylsilane, 10 parts of methylhydrodichlorosilane, 30 parts of dimethyldichlorosilane and 15 parts of trimethyltrichlorosilane in a mixed solution of 60 parts of toluene and 120 parts of water, preserving the heat at 15 ℃ for 1h, washing with water until the mixture is neutral, adding 5 parts of zinc octoate, reacting at 140 ℃ for 3h, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(5) adding modified hollow silica particles and a platinum catalyst into vinyl-containing silicon rubber at the temperature of 80 ℃, stirring for 1h, and curing at the temperature of 250 ℃ to prepare a silicon rubber insulating film; the mass ratio of the vinyl-containing silicon rubber to the modified hollow silica particles is 10: 2.
Comparative example 1: the difference from example 1 is that silica particles were not added in the preparation of the silicone rubber insulating film;
the silicon rubber insulating film comprises the following preparation steps:
(4) dissolving 5 parts of dichlorovinylmethylsilane, 5 parts of methylhydrodichlorosilane, 25 parts of dimethyldichlorosilane and 10 parts of trimethyltrichlorosilane in a mixed solution of 50 parts of toluene and 100 parts of water, preserving the heat at 10 ℃ for 3 hours, washing with water until the mixture is neutral, adding 2 parts of zinc octoate, reacting at 120 ℃ for 5 hours, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(5) adding a platinum catalyst into the vinyl-containing silicon rubber at 50 ℃, stirring for 0.5h, and curing at 190 ℃ to prepare the silicon rubber insulating film.
Comparative example 2: the difference from the example 1 is that modified silica particles are added when the silicon rubber insulating film is prepared;
the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 7 parts of silicon dioxide particles into 45 parts of toluene, adding 50 parts of 1, 6-hexamethylene diisocyanate and 1-2 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, centrifugally drying, dispersing the precipitate into 45 parts of toluene, adding 35 parts of pentaol triacrylate and 1.5 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, and centrifugally drying to prepare modified silicon dioxide particles;
(2) dissolving 7 parts of dichlorovinylmethylsilane, 8 parts of methylhydrodichlorosilane, 28 parts of dimethyldichlorosilane and 12 parts of trimethyltrichlorosilane in a mixed solution of 55 parts of toluene and 110 parts of water, preserving the heat for 2 hours at 13 ℃, washing with water until the mixture is neutral, adding 4 parts of zinc octoate, reacting for 4 hours at 130 ℃, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(3) adding modified silicon dioxide particles and a platinum catalyst into vinyl-containing silicon rubber at 65 ℃, stirring for 0.8h, and curing at 220 ℃ to prepare a silicon rubber insulating film; the mass ratio of the vinyl-containing silicon rubber to the modified hollow silica particles is 10:1.
Comparative example 3: the difference from example 1 is that unmodified hollow silica particles are added in the preparation of the silicone rubber insulating film;
the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 75 parts of tetraethyl silicate, then adding 12wt% hydrochloric acid solution to adjust the pH to 2, stirring at 80 ℃ for 5 hours, adding 23 parts of polyvinyl alcohol, continuing to preserve heat for 1.5 hours, removing the solvent, adding 0.3 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 110 parts of deionized water, adjusting the pH to 10.5 by adopting 17wt% ammonia water, stirring at 35 ℃ for 7 hours, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dissolving 7 parts of dichlorovinylmethylsilane, 8 parts of methylhydrodichlorosilane, 28 parts of dimethyldichlorosilane and 12 parts of trimethyltrichlorosilane in a mixed solution of 55 parts of toluene and 110 parts of water, preserving the heat for 2 hours at 13 ℃, washing with water until the mixture is neutral, adding 4 parts of zinc octoate, reacting for 4 hours at 130 ℃, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(4) adding hollow silica particles and a platinum catalyst into vinyl-containing silicon rubber at 65 ℃, stirring for 0.8h, and curing at 220 ℃ to prepare a silicon rubber insulating film; the mass ratio of the vinyl-containing silicon rubber to the modified hollow silica particles is 10:1.
Comparative example 4: the difference from the example 1 is that 1, 6-hexamethylene diisocyanate modified hollow silica particles are added during the preparation of the silicon rubber insulating film;
the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 75 parts of tetraethyl silicate, then adding 12wt% hydrochloric acid solution to adjust the pH to 2, stirring at 80 ℃ for 5 hours, adding 23 parts of polyvinyl alcohol, continuing to preserve heat for 1.5 hours, removing the solvent, adding 0.3 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 110 parts of deionized water, adjusting the pH to 10.5 by adopting 17wt% ammonia water, stirring at 35 ℃ for 7 hours, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dispersing 7 parts of hollow silica particles into 45 parts of toluene, adding 50 parts of 1, 6-hexamethylene diisocyanate and 1-2 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, centrifugally drying, dispersing the precipitate into 45 parts of toluene, adding 35 parts of pentaol triacrylate and 1.5 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, and centrifugally drying to prepare modified hollow silica particles;
(4) dissolving 7 parts of dichlorovinylmethylsilane, 8 parts of methylhydrodichlorosilane, 28 parts of dimethyldichlorosilane and 12 parts of trimethyltrichlorosilane in a mixed solution of 55 parts of toluene and 110 parts of water, preserving the heat for 2 hours at 13 ℃, washing with water until the mixture is neutral, adding 4 parts of zinc octoate, reacting for 4 hours at 130 ℃, and washing with water until the mixture is neutral to obtain the vinyl-containing silicone rubber;
(5) adding modified hollow silica particles and a platinum catalyst into vinyl-containing silicon rubber at 65 ℃, stirring for 0.8h, and curing at 220 ℃ to prepare a silicon rubber insulating film; the mass ratio of the vinyl-containing silicon rubber to the modified hollow silica particles is 10:1.
Comparative example 5: the difference from the embodiment 1 is that the prepared silicon rubber does not contain double bonds and silicon-hydrogen bonds during preparation of the silicon rubber insulating film;
the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 75 parts of tetraethyl silicate, then adding 12wt% hydrochloric acid solution to adjust the pH to 2, stirring at 80 ℃ for 5 hours, adding 23 parts of polyvinyl alcohol, continuing to preserve heat for 1.5 hours, removing the solvent, adding 0.3 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 110 parts of deionized water, adjusting the pH to 10.5 by adopting 17wt% ammonia water, stirring at 35 ℃ for 7 hours, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dispersing 7 parts of hollow silica particles into 45 parts of toluene, adding 50 parts of 1, 6-hexamethylene diisocyanate and 1-2 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, centrifugally drying, dispersing the precipitate into 45 parts of toluene, adding 35 parts of pentaol triacrylate and 1.5 parts of dibutyltin dilaurate, reacting at 55 ℃ for 4 hours, and centrifugally drying to prepare modified hollow silica particles;
(4) dissolving 5 parts of diphenyldichlorosilane, 36 parts of dimethyldichlorosilane and 12 parts of trimethyltrichlorosilane in a mixed solution of 55 parts of toluene and 110 parts of water, preserving the heat at 13 ℃ for 2 hours, washing with water until the mixture is neutral, adding 4 parts of zinc octoate, reacting at 130 ℃ for 4 hours, and washing with water until the mixture is neutral to obtain silicon rubber;
(5) adding modified hollow silica particles and a platinum catalyst into silicon rubber at 65 ℃, stirring for 0.8h, and curing at 220 ℃ to prepare a silicon rubber insulating film; the mass ratio of the silicon rubber to the modified hollow silica particles is 10:1.
The silicone rubber insulating films obtained in the examples and comparative examples were subjected to tests for electrical insulating properties (dielectric constant, refer to GB/T1409-.
| Item | Dielectric constant (Normal temperature) | Tensile Strength (MPa) | Grade of adhesion |
| Example 1 | 2.12 | 8.34 | |
| Example 2 | 2.06 | 9.23 | |
| Example 3 | 2.01 | 9.97 | |
| Comparative example 1 | 2.65 | 6.89 | |
| Comparative example 2 | 2.79 | 8.52 | |
| Comparative example 3 | 2.35 | 7.46 | |
| Comparative example 4 | 2.22 | 7.96 | |
| Comparative example 5 | 2.19 | 7.52 | 4 stage |
From the data, the silicon rubber insulating film prepared by the invention has good electrical insulating property, tensile strength and matrix adhesion, and the difference between the comparative example 1 and the example 1 is that modified hollow silicon dioxide particles are not added during the preparation of the silicon rubber insulating film, so the electrical insulating property is poor, the tensile strength is low, and the adhesion is poor; the difference between the comparative example 2 and the example 1 is that solid modified silicon dioxide particles are added during the preparation of the silicon rubber insulating film, so that the electrical insulating property is poor, and the silicon rubber insulating film also has good tensile strength and matrix adhesion; the comparative example 3 is different from the example 1 in that unmodified hollow silica particles are added in the preparation of the silicone rubber insulating film, so that the electrical insulating property is poorer than that of the example 1, the tensile strength is lower, and the adhesion of a matrix is poor; comparative example 4 is different from example 1 in that 1, 6-hexamethylene diisocyanate-modified hollow silica particles, which have lower bonding strength with silicone rubber than example 1 and thus relatively lower tensile strength, are added during preparation of the silicone rubber insulating film, but have good substrate adhesion; the difference between the comparative example 5 and the example 1 is that the silicone rubber prepared during the preparation of the silicone rubber insulating film does not contain double bonds and silicon-hydrogen bonds, so that the modified hollow silica particles and the silicone rubber have poor bonding firmness, lower tensile strength and adhesion grades, and slightly reduced dielectric constant.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A lead clamping device for a lightning arrester is characterized by comprising a lead clamping main body (1) and a line pressing body (2), wherein the lead clamping main body (1) comprises a main body clamping section (11), a main body puncture section (12) and a lightning arrester connecting section (13) which are sequentially connected; the main body clamping section (11) comprises a main body clamping part (111) and main body clamping covering parts (112) arranged on two sides, and the main body puncturing section (12) comprises a main body puncturing part (121) and main body puncturing covering parts (122) arranged on two sides; the pressing body (2) comprises a pressing body clamping section (21) and a pressing body puncturing section (22) which are sequentially connected, the pressing body clamping section (21) comprises a pressing body clamping part (211) and pressing body clamping cover closing parts (212) arranged on two sides, and the pressing body puncturing section (22) comprises a pressing body puncturing part (221) and pressing body puncturing cover closing parts (222) arranged on two sides; the utility model discloses a line ball body, including main part clamping part (111) and line ball body clamping part (211), line ball body clamping part (111) and line ball body clamping part (211) inner wall are equipped with centre gripping pad (6), be equipped with puncture (3) in main part puncture portion (121) and line ball body puncture portion (221), it closes clamp (4) to be equipped with the lid on line ball body centre gripping lid closes portion (212) and line ball body puncture lid portion (222), main part centre gripping lid closes and is equipped with on portion (122) and closes the lid that presss from both sides (4) and suit and close mouthful (5) with the lid on main part gripping lid.
2. The lead clamping device for the lightning arrester as claimed in claim 1, wherein the main body clamping portion (111), the main body piercing portion (121), the crimp body clamping portion (211) and the crimp body piercing portion (221) are of mutually engaged semicircular structures.
3. A lead clamping device for a lightning arrester according to claim 2, characterized in that the lightning arrester connecting section (13) is a cylindrical structure with a bottom part provided with a recess (131), and the surface of the recess (131) is provided with a thread (132).
4. The lead clamping device for the lightning arrester according to claim 3, characterized in that the cylindrical structure diameter of the lightning arrester connecting section (13) is the same as the semicircular structure diameter of the main body clamping part (111), the main body piercing part (121), the line ball clamping part (211) and the line ball piercing part (221).
5. A lead wire holding device for lightning arrester according to any one of claims 1-4, characterized in that the junction of the lightning arrester connecting section (13) and the main body piercing section (12) is a solid connecting section (133).
6. The lead clamping device for the lightning arrester according to any one of claims 1-4, characterized in that the cover clamp (4) comprises a cover clamp main body (41) and a cover clamp base (42), wherein both sides of the cover clamp main body (41) are provided with elastic clamping arms (43), and a gap (45) is arranged between the elastic clamping arms (43) and the cover clamp main body (41); the end of the elastic clamping arm (43) is provided with a locking convex part (44), and a gap (46) is arranged between the locking convex part (44) and the cover clamping base (42).
7. The lead clamping device for the arrester as claimed in claim 6, wherein the portion of the locking protrusion (44) near the cover clip base (42) is a flat surface (441), and the portion far from the portion near the cover clip base (42) is provided with a slope (442).
8. A clamping device for a lightning arrester according to claim 6, characterized in that the width of the gap (46) is greater than the thickness of the cover opening (5).
9. The lead clamping device for the lightning arrester according to any one of claims 1-4, characterized in that the lead clamping body (1) and the line pressing body (2) are made of conductive metal, and the outer surfaces of the lead clamping body (1) and the line pressing body (2) are coated with a silicon rubber insulating film, and the silicon rubber insulating film comprises the following preparation steps:
(1) dispersing 40 parts of propyl triethoxysilane in 70-80 parts of tetraethyl silicate, then adding 10-13wt% hydrochloric acid solution to adjust the pH value to 2-3, stirring at 70-90 ℃ for 3-6h, adding 20-25 parts of polyvinyl alcohol, continuing to keep the temperature for 1-2h, removing the solvent, adding 0.2-0.5 part of n-hexane, and uniformly mixing to prepare a precursor solution;
(2) dropping the precursor into 100-120 parts of deionized water, adjusting the pH to 10-11 by adopting 15-20wt% ammonia water, stirring at 30-40 ℃ for 5-10h, washing to be neutral, centrifuging, and drying to prepare hollow silicon dioxide particles;
(3) dispersing 5-10 parts of hollow silicon dioxide particles into 40-50 parts of toluene, adding 40-60 parts of 1, 6-hexamethylene diisocyanate and 1-2 parts of dibutyltin dilaurate, reacting at 50-60 ℃ for 3-5h, centrifugally drying, dispersing the precipitate into 40-50 parts of toluene, adding 30-40 parts of pentaol triacrylic acid and 1-2 parts of dibutyltin dilaurate, reacting at 50-60 ℃ for 3-5h, centrifugally drying, and preparing modified hollow silicon dioxide particles;
(4) dissolving 5-10 parts of dichlorovinylmethylsilane, 5-10 parts of methylhydrodichlorosilane, 25-30 parts of dimethyldichlorosilane and 10-15 parts of trimethyltrichlorosilane in a mixed solution of 50-60 parts of toluene and 100 parts of water, preserving the heat for 1-3h at 10-15 ℃, adding 2-5 parts of zinc octoate after washing to be neutral, reacting for 3-5h at 140 ℃ of 120-water, and washing to be neutral to obtain the vinyl-containing silicone rubber;
(5) adding the modified hollow silica particles and the platinum catalyst into the vinyl-containing silicon rubber at 50-80 ℃, stirring for 0.5-1h, and curing at 190-250 ℃ to prepare the silicon rubber insulating film.
10. The device for clamping the lead wire for the lightning arrester as claimed in claim 9, wherein the mass ratio of the vinyl-containing silicone rubber to the modified hollow silica particles in step (5) is 10: 1-2.
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| CN202011119741.3A CN112448179B (en) | 2020-10-19 | 2020-10-19 | Lead clamping device for lightning arrester |
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| CN202011119741.3A CN112448179B (en) | 2020-10-19 | 2020-10-19 | Lead clamping device for lightning arrester |
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| CN112448179B CN112448179B (en) | 2021-12-14 |
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| CN101325104A (en) * | 2007-06-15 | 2008-12-17 | 上海兆邦电力器材有限公司 | Lightning protection post insulator |
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