A kind of suspended compound insulator
Technical field
The present invention relates to a kind of composite insulator that is used for power circuit or electric railway circuit, particularly a kind of suspended compound insulator.
Background technology
Insulator is generally made by the high insulator material of resistance, and its effect is that current potential conductor inequality is separated, and not allowing has electric current to pass through between the conductor, and electric current can be circulated by certain direction.At present, suspension insulator is divided into ceramic insulator, glass insulator, composite insulator both at home and abroad.Pottery and the easy embrittlement of glass insulator, vulnerable to pollution causes high pressure flashover and the cracked accident of fried bottle easily; Flexible poor, the easily embrittlement of the anti-folding of the plug of common clavate composite insulator.
The end accessory of insulator is the part that is connected and fixed of insulator and power transmission line, electric pole, not only to bear the pressure of intrasystem various external force, lead self generation, in long-term use, also to bear the wind-force of indefinite direction and the pressure of accumulated snow, therefore the quality of connection of end accessory and plug is to be directly connected to the fail safe of product operation and the important symbol of reliability, usually adopt the plug and the end accessory interconnection technique of the production of compression joint type assembly technology, embrittlement takes place easily, easily get loose, wear out, and there is potential safety hazard in poor stability.
Summary of the invention
The objective of the invention is to problem and shortage, a kind of suspended compound insulator with flexibility, good pollution resistance, portability, flexible, the anti-embrittlement of anti-folding is provided at above existence.
Another object of the present invention provides a kind of bonding strength height, good stability, is difficult for wearing out the suspended compound insulator of safety durable.
Technical scheme of the present invention is achieved in that
A kind of suspended compound insulator, comprise plug, be located at the full skirt cover of mandrel outer and be located at the end assembly at plug both ends, wherein, plug is done to strengthen material of main part by directional glass fiber, and electro-insulating rubber material or the flexiplast by softness becomes bar as adhesives again.
In order to improve the withstand voltage and anti-pollution characteristic of full skirt cover, the full skirt cover adopts insulating polymeric material to make, and insulating polymeric material can be materials such as silicon rubber, ethylene propylene diene rubber or soft plastic.Full skirt cover is Unitarily molded on the plug or be socketed on the plug.
Further technical scheme of the present invention is achieved in that
The end assembly comprises the awl muzzle, can insert the enlarging cone, locking nut and the connector that embed in the plug, wherein: the enlarging cone is substantially cone, the awl muzzle is a tubular member, endoporus or the interference fit consistent of the miner diameter end of awl muzzle with diameter of mandrel, the endoporus of the bigger diameter end of awl muzzle is set to toroidal, and the hole wall of toroidal is provided with internal tooth, and the outer toroid of bigger diameter end is provided with the boss rank; Locking nut one end endoporus is provided with the concave station rank that cooperate with the boss rank, and locking nut other end endoporus is provided with internal thread; Connector one end is provided with the external screw thread that screws mutually with internal thread, and the other end adopts bulb shape or ball-and-socket shape or suspension ring shape; More stable for the end assembly is connected with plug, on the assembly of end, also be arranged with grading ring.
Plug of the present invention makes to strengthen material of main part by directional glass fiber, electro-insulating rubber material or flexiplast by softness becomes bar as adhesives again, make insulator have flexibility and reliable bonding strength, have good pollution resistance, portability, fracture or the fatigue fracture of wind pendulum can not bend in transportation with in using, effectively avoided the generation of high pressure flashover or the cracked accident of fried bottle, the cycle in useful life of having improved product; Again because the present invention has adopted the version of above-mentioned end assembly, adopt this cone enlarging interconnection technique to make the bonding strength of end assembly and plug be higher than the bonding strength of conventional crimp technology, plug was difficult for getting loose in the assembly of end when insulator used, and fracture or wind pendulum fatigue fracture phenomenon that stress fatigue or defective workmanship cause can not occur; The big I of the flexible diameter of mandrel of the present invention is according to the tensile load size decision of product; The type of the length of suspended compound insulator, the quantity of umbrella cover and shape, end assembly is according to antipollution grade and handling characteristics decision; The present invention can satisfy the instructions for use of the various classes of insulation and strength grade; All be better than existing link insulator or bar type composite insulator at aspects such as useful life, security reliabilities.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that full skirt cover of the present invention is socketed in the structural representation on the plug;
Fig. 2 is the Unitarily molded structural representation on plug of full skirt cover of the present invention;
Fig. 3 is an insulator part cut-away view of the present invention;
Fig. 4 is a decomposing schematic representation of the present invention;
Fig. 5 is the part cut-away view of band grading ring of the present invention;
Fig. 6 is the decomposing schematic representation of band grading ring of the present invention.
Embodiment
A kind of suspended compound insulator, comprise plug 1, be located at the outer full skirt cover 2 of plug 1 and be located at the assembly 3 at plug 1 both ends, plug 1 is done to strengthen material of main part by directional glass fiber, and electro-insulating rubber material or the flexiplast by softness becomes bar as adhesives again.
Full skirt cover 2 adopts insulating polymeric material to make; insulating polymeric material can be materials such as silicon rubber, ethylene propylene diene rubber or soft plastics; full skirt cover 2 has the protection plug, increases creep distance, resists the effect of polluting; can make different shape according to withstand voltage and fouling resistance rating; as shown in Figure 1; full skirt cover 2 is socketed on the plug 1, and as shown in Figure 2, it is 2 Unitarily molded on plug 1 that full skirt overlaps.
As shown in Figure 3-4, awl muzzle 4, enlarging cone 5, locking nut 6 and connector 7 constitute end assembly 3, wherein, awl muzzle 4 is a tubular member, the endoporus of its miner diameter end and the consistent or interference fit of plug 1 diameter, the endoporus of bigger diameter end is set to toroidal, and the hole wall of toroidal is provided with internal tooth, and the outer toroid of bigger diameter end is provided with boss rank 41; Locking nut 6 one end endoporus are provided with concave station rank 61, and locking nut 6 other end endoporus are provided with internal thread 62; Connector 7 is provided with the external screw thread 71 that screws mutually with internal thread 62; Fit into, locking nut 6 is passed concave station rank 61 that awl muzzle 4 makes boss rank 41 and locking nut 6 to offset and closes, the plug 1 that will be with full skirt cover 2 then passes the miner diameter end endoporus of awl muzzle 4, inserting vertically from the outer end to embed by enlarging cone 5 again makes plug 1 expansion be pressed on the toroidal inner hole wall in plug 1 body, the internal tooth that the toroidal hole wall is provided with can effectively increase coefficient of friction, again by compressing enlarging cone 5 and plug 1 in the connector 7 precession locking nuts 6.
Connector 7 can adopt multiple shape, as shown in Figure 1, is the bulb shape, as shown in Figure 2, is the ball-and-socket shape, as shown in Figure 5, is the suspension ring shape.More stable for end assembly 3 is connected with plug 1, on end assembly 3, also be arranged with grading ring 8, shown in Fig. 5-6.
Although the present invention describes with reference to specific embodiment, this description and not meaning that is construed as limiting the present invention.With reference to description of the invention, other of the disclosed embodiments changes, if all can expect for those skilled in the art, so, such variation should belong within this claim institute's restricted portion and the spirit.