Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B17/00—Insulators or insulating bodies characterised by their form
  • H01B17/02—Suspension insulators; Strain insulators
  • H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator

Definitions

• the present invention relates to a composite insulator for use in a power line or an electrified railway line, and more particularly to a suspension composite insulator. '
• the insulator is generally made of an insulator material with a very high resistance. Its function is to separate the conductors with different potentials so that no current flows between the conductors, so that the current can flow in a certain direction.
• domestic and overseas suspension insulators are classified into ceramic insulators, glass insulators, and composite insulators. Ceramic and glass insulators are brittle and susceptible to contamination, which can easily cause high-voltage flashover and frying bottle cracking.
• the common rod-shaped composite insulator has poor flexural flexibility and brittle fracture. At present, the use of organic composite materials is widely promoted at home and abroad.
• the insulators produced are also called composite insulators.
• the end attachment of the composite insulator is the connection and fixing part of the composite insulator and the power transmission line and the electric pole. It not only bears various external forces in the system, but also the pressure generated by the wire itself. In the long-term use, it also bears the wind and product in the uncertain direction. The pressure of the snow, so the quality of the connection between the end attachment and the mandrel is an important sign directly related to the safety and reliability of the operation of the product.
• the connection between the mandrel and the end attachment produced by the usual crimping assembly process is prone to occur. It is brittle, easy to loose, aging, and has poor stability, and has potential safety hazards. It is a major problem in the domestic and international composite insulator technology.
• the object of the present invention is to provide a suspension type which has good anti-staining property, anti-folding property, anti-brittle property, high joint strength, good stability, aging resistance, safety and durability in view of the above problems and deficiencies.
• Composite insulator which has good anti-staining property, anti-folding property, anti-brittle property, high joint strength, good stability, aging resistance, safety and durability in view of the above problems and deficiencies.
• a suspension composite insulator comprising a core rod, an umbrella skirt disposed outside the core rod, and an end assembly disposed at both ends of the core rod, wherein the core rod is made of oriented glass fiber as a reinforcing main material, and then passed through a soft An insulating rubber material or a flexible plastic is bonded as a binder to the bar.
• the umbrella skirt is made of a polymer insulating material, and the high molecular insulating material may be a polymer insulating material such as silicone rubber, EPDM rubber or soft plastic.
• the shed skirt can be integrally molded on the mandrel or sleeved on the mandrel.
• the end assembly comprises a tapered sleeve, a flared cone insertable into the inner ends of the mandrel, a lock nut and a connecting member, wherein: the flared cone is substantially a cone, and the cone head is provided with a retaining piece
• the chamfer sleeve is a tubular member, and the inner diameter of the small diameter end of the cone sleeve is consistent with the diameter of the mandrel or the interference fit, and the inner hole of the large diameter end of the cone sleeve is arranged in a bell mouth shape, and the bell mouth is formed on the wall of the bell mouth.
• the inner ring has an inner ring, and the outer ring of the large diameter end is provided with a convex step; one end of the inner hole of the lock nut is provided with an internal thread, and a concave step corresponding to the convex step is arranged in the hole;
• the external thread is screwed to the internal thread, and the other end is in the shape of a ball or a ball or a ring to facilitate the connection; in order to make the end assembly and the mandrel more stable, on the end assembly
• a pressure equalizing ring is also provided.
• the mandrel of the invention is made of oriented glass fiber as a reinforcing main material, and then bonded into a bar by a soft insulating rubber material or a flexible plastic as a binder, so that the insulator has softness and reliable joint strength, and has good anti-staining property. , portability, no bending breakage or wind sag fatigue fracture during transportation and use, effectively avoiding the occurrence of high-pressure flashover or frying bottle crushing accident, improving the service life cycle of the product;
• the structural form of the end assembly adopts the conical flare connection technology to make the connection strength between the end assembly and the mandrel higher than that of the conventional crimping technology, and the core rod is not easily loosened from the end assembly when the insulator is used.
• the diameter of the flexible mandrel of the present invention can be determined according to the tensile load of the product; the length of the suspension composite insulator, the number and shape of the umbrella sleeve, the type of the end assembly according to the pollution resistance level and the use characteristics
• the invention can meet the requirements of various insulation grades and strength grades; it is superior to the existing string insulators or rod composite insulators in terms of service life, safety and reliability.
• Figure 1 is a schematic view showing the structure of the umbrella skirt sleeve of the present invention attached to the mandrel;
• FIG. 2 is a schematic structural view of the umbrella skirt of the present invention integrally molded on a mandrel;
• Figure 3 is a partial cross-sectional view of the insulator of the present invention.
• Figure 4 is an exploded perspective view of the present invention
• Figure 5 is a partial cross-sectional view showing a pressure equalizing ring of the present invention.
• FIG. 6 is an exploded perspective view of the pressure equalizing ring of the present invention.
• a suspension composite insulator includes a core rod 1, an umbrella skirt 2 disposed outside the core rod 1, and an assembly 3 disposed at both ends of the core rod 1.
• the core rod 1 is reinforced by oriented glass fibers.
• the main material is then bonded to the bar by a soft insulating rubber material or a flexible plastic as a binder.
• the umbrella skirt 2 is made of polymer insulation material, and the polymer insulation material can be silicone rubber, EPDM rubber or soft plastic material.
• the umbrella skirt 2 has the function of protecting the mandrel, increasing the creepage distance and resisting pollution. , can be made into various shapes according to the pressure resistance and stain resistance level, the connection manner of the umbrella skirt 2 and the mandrel 1 : as shown in FIG. 1 , the umbrella skirt sleeve 2 is sleeved on the mandrel 1 ;
• the umbrella skirt 2 is integrally molded on the mandrel 1.
• the taper sleeve 4, the flared cone 5, the lock nut 6 and the connecting member 7 constitute an end assembly 3, wherein the taper sleeve 4 is a tubular member, and the inner diameter of the small diameter end thereof is Mandrel 1 has the same diameter or interference fit, large diameter
• the inner hole of the end is arranged in a bell mouth shape, the inner wall of the bell mouth shaped hole is provided, and the outer ring of the large diameter end is provided with a convex step 41;
• the inner hole of the lock nut 6 is provided with a concave step 61, and is provided at one end of the inner hole
• the connecting member 7 is provided with an external thread 71 screwed with the internal thread 62;
• the taper sleeve 4 When assembling, first, the taper sleeve 4 is placed on the lock nut 6 so that the convex step 41 of the taper sleeve 4 abuts against the concave step 61 of the lock nut 6, and then the mandrel 1 of the umbrella skirt 2 is sheathed. Inserting from the small diameter end of the taper sleeve 4 until a certain distance is left, inserting the flared cone 5 into the mandrel 1 along the axial direction of the mandrel 1 to expand the mandrel 1 and then pulling the mandrel 1 in the reverse direction.
• the expansion portion of the mandrel 1 is pressed against the bellows-shaped inner hole wall, and the internal teeth provided on the bell mouth-shaped hole wall can effectively increase the friction coefficient, and then screwed into the lock nut 6 through the connecting member 7 to be pressed.
• the connecting member 7 can adopt various shapes. As shown in Fig. 1, the end portion of the connecting member 7 has a ball-shaped shape, as shown in Fig. 2, the end portion The shape is a ball-and-socket shape, as shown in Fig. 5, the end shape is a hanging ring shape.
• a pressure equalizing ring 8 is also provided on the end assembly 3, as shown in Fig. 5-6.

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• Insulators (AREA)
• Insulating Bodies (AREA)

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Cited By (2)

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Citations (5)

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• 2006
  • 2006-11-24 CN CNB2006101237274A patent/CN100481276C/zh not_active Expired - Fee Related
• 2007
  • 2007-11-20 EP EP07845658.9A patent/EP2117013B1/de not_active Not-in-force
  • 2007-11-20 WO PCT/CN2007/003271 patent/WO2008061446A1/zh active Application Filing

Patent Citations (5)

Non-Patent Citations (1)

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