CN203966689U

CN203966689U - Composite insulator

Info

Publication number: CN203966689U
Application number: CN201420321522.7U
Authority: CN
Inventors: 马斌; 朱勇; 邱勇; 丁建兵; 郁杰; 周曙琛
Original assignee: Jiangsu Shenma Electric Power Co Ltd
Current assignee: Jiangsu Shenma Electric Power Co Ltd
Priority date: 2014-06-16
Filing date: 2014-06-16
Publication date: 2014-11-26
Anticipated expiration: 2024-06-16

Abstract

The utility model discloses a kind of composite insulator, comprise inner core and the flange that is connected to inner core two ends, this inner core end is provided with fixture, this inner core is outside equipped with winding layer, this winding layer is wrapped on this inner core, this winding layer has this fixture and the fixing effect of this inner core, and this fixture is fixed on flange.Composite insulator each several part of the present utility model is connected firmly, and mechanical strength is good.

Description

Composite insulator

Technical Field

The utility model relates to a power transmission equipment field specifically is a composite insulator.

Background

With the development of electric power utilities, insulators are widely used in electric power transmission equipment. The composite insulator gradually begins to be widely applied due to the advantages of good corrosion resistance, no brittle fracture and the like. The composite insulator can be used as an electrical insulation component for power station bus struts, isolating switches, smoothing reactors, power transmission line cross arm struts and other power transmission and transformation equipment.

The traditional composite insulator generally comprises an insulating core rod, flanges at two ends and a silicon rubber umbrella group. According to the traditional composite insulator, the flange is sleeved on the end part of the insulator core rod and then directly glued, the mechanical strength of the glued part is poor, and the flange at the sleeved part needs to reach a certain longitudinal height and thickness, so that the flange needs a large amount of materials, and the weight of the composite insulator is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a composite insulator, this composite insulator each part firm in connection, mechanical strength is good to prior art's not enough.

In order to realize the purpose of the utility model, the utility model adopts the following technical means: the utility model provides a composite insulator, includes the inner core and connects the flange at the inner core both ends, and this inner core tip is provided with the mounting, is provided with the winding layer outside this inner core, and this winding layer winding is on this inner core, and this winding layer has the effect of fixing this mounting and this inner core, and this mounting is fixed on this flange.

Preferably, the composite insulator further comprises a shed, and the shed is wrapped outside the winding layer.

Preferably, the fixing member is disposed on an outer surface of an end portion of the core, and the winding layer at the end portion of the core is directly wound on the fixing member. More preferably, the fixing member has a cylindrical structure sleeved on the end of the inner core. In addition, the part of the fixing piece, which is in contact with the winding layer, is roughened. The rough treatment comprises the steps of arranging a bulge or a groove at the part of the fixed part, which is in contact with the winding layer, and carrying out sand blasting treatment or texture carving on the surface of the part of the fixed part, which is in contact with the winding layer, and the like.

Preferably, one end of the fixing member away from the end portion of the core and one end of the flange away from the end portion of the core are disposed in a staggered manner in the axial direction of the core. Both the height of the fastener extending longitudinally of the core and the height of the flange extending longitudinally of the core are not flush.

Preferably, the fixing member is rod-shaped. More preferably, the composite insulator includes at least two fixing members, and the fixing members are uniformly arranged in the circumferential direction of the end portion of the inner core. Furthermore, the inner core is formed by arranging a plurality of core rods, and the fixing piece and the core rods are wound into a whole through the winding layer.

According to the composite insulator, the end part of the inner core is directly or indirectly fixed with the flange and the fixing piece fixed on the flange at the same time, so that the bonding strength of the composite insulator and the flange is improved, the mechanical strength of the bonding part is increased, the height of the flange along the longitudinal direction of the inner core is lower than that of the flange in the prior art, the requirement on the mechanical strength of the composite insulator can be met, and the effects of saving materials and reducing weight are further achieved. The winding layer winds the fixing piece and the inner core together, so that the bonding strength of the fixing piece and the inner core is improved. Because the contact part of the fixing piece and the winding layer is subjected to rough treatment, the fixing piece and the winding layer are combined more tightly, and the combination strength is improved. Because the one end that above-mentioned inner core tip was kept away from to above-mentioned mounting and the one end that this inner core tip was kept away from to above-mentioned flange misplace the setting on the axis direction of this inner core, because foretell two tip are stress concentration point, when above-mentioned two tip dislocation set, two stress concentration point also stagger the distribution, prevent that concentrated stress from destroying the winding layer of this department, improved the bulk strength of structure. Because the fixing pieces are uniformly arranged at the end part of the inner core in the circumferential direction, the internal stress of the composite insulator is uniformly distributed as much as possible, and the strength of the composite insulator is improved.

Drawings

Fig. 1 is a cross-sectional view of a composite insulator 100 according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a second composite insulator 200 according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a second fixing member 203 according to an embodiment of the present invention;

fig. 4 is a schematic perspective sectional view of a part of a structure of a three-layer composite insulator according to an embodiment of the present invention.

Wherein,

100. 200-composite insulator;

101. 201, 301-inner core;

102. 202-flange;

103. 203, 303 — fixing piece;

104. 204, 304 — wrap layer;

105-sheds;

106. 206-first screw hole;

107. 207, 307-second threaded hole;

108. 208-first end;

109. 209, 309-second end;

210-Chassis;

211-side bar;

212-projection;

313 — core rod.

Detailed Description

As required, detailed embodiments of the present invention will be disclosed herein. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner, including employing various features disclosed herein in connection with which such features may not be explicitly disclosed.

The first embodiment is as follows:

as shown in fig. 1, a composite insulator 100 according to a first embodiment of the present invention includes an inner core 101 made of glass fiber reinforced plastic, and cylindrical fixing members 103 are mounted at two ends of the inner core 101. The end of the inner core 101 is further provided with a flange 102, and the flange 102 is provided with a first screw hole 106. A second screw hole 107 is provided at a position corresponding to the fixing member 103 in cooperation with the first screw hole 106, an internal thread is provided in the second screw hole 107, and the flange 102 and the fixing member 103 are fixed by bolts screwed into the first screw hole 106 and the second screw hole 107. The winding layer 104 is formed by winding glass fiber on the outside of the inner core 101 and the fixing member 103. The outer wall of the cylindrical fixing member 103 is formed in a longitudinally wavy shape at a portion contacting the winding layer 104. A shed 105 is injected outside the wrapping 104. The flanges 102 are glued to both ends of the core 101 wrapped with the wrapping 104 and injected with the shed 105. The end of flange 102 remote from the end of composite insulator 100 is a first end 108, the end of fastener 103 remote from the end of composite insulator 100 is a second end 109, and first end 108 and second end 109 are not aligned longitudinally along core 101.

In the composite insulator 100 of the embodiment, the flange 102 and the fixing member 103 fixed to the flange 102 are fixed to the end of the inner core 101, so that the bonding strength between the composite insulator 100 and the flange 102 is improved. Since the winding layer 104 winds the inner core 101 and the fixing member 103 together, the bonding strength of the inner core 101 and the fixing member 103 is improved. Because the contact part of the outer wall of the fixing member 103 and the winding layer 104 is set to be in a longitudinal wave shape, the bonding strength of the fixing member 103 and the winding layer 104 is improved. Because the first end 108 and the second end 109 are not aligned in the longitudinal direction of the core 101, the stress points of the first end 108 and the second end 109 on the winding layer 104 are staggered, and the two stress points are prevented from being overlapped to damage the winding layer 104.

Example two:

as shown in fig. 2 and 3, the composite insulator 200 according to the second embodiment of the present invention includes an inner core 201 made of glass fiber reinforced plastic material, and fixing members 203 are disposed at two ends of the inner core 201. The end of the inner core 201 is further provided with a flange 202, and the flange 202 is provided with a first screw hole 206. A second screw hole 207 is formed at a position corresponding to the fixing member 203 in cooperation with the first screw hole 206, an internal thread is formed in the second screw hole 207, and the flange 202 and the fixing member 203 are fixed by bolts screwed into the first screw hole 206 and the second screw hole 207. The winding layer 204 is formed by winding glass fiber on the outer surface of the inner core 201 and the fixing member 203. The fixing member 203 includes a base 210 having a disk shape and three side bars 211 connected to one side of the base 210, and a protrusion 212 is provided on one surface of the side bars 211 contacting the winding layer 204. The outside of the winding layer 204 is not provided with a shed, but is coated with fluorocarbon paint. Flanges 202 are glued to both ends of the core 201 around which the wrapping 204 is wrapped. The end of the flange 202 remote from the end of the composite insulator 200 is a first end 208, the end of the fixing member 203 remote from the end of the composite insulator 200 is a second end 209, and the first end 208 and the second end 209 are not flush with each other in the longitudinal direction of the core 201.

In the composite insulator 200 of the embodiment, the flange 202 and the fixing member 203 fixed to the flange 202 are simultaneously fixed to the end of the inner core 201, so that the bonding strength between the composite insulator 200 and the flange 202 is improved. Since the winding layer 204 winds the core 201 and the fixing member 203 together, the bonding strength of the core 201 and the fixing member 203 is improved. Since the side bar 211 of the fixing member 203 is provided with the protrusion 212 on the side contacting the winding layer 204, the bonding strength between the fixing member 203 and the winding layer 204 is improved. Because the first end 208 and the second end 209 are not aligned longitudinally of the core 201, the stress points of the first end 208 and the second end 209 on the wrap 204 are staggered, preventing the two stress points from overlapping and causing damage to the wrap 204. Because the umbrella skirt is not arranged outside the winding layer 204, the structure of the composite insulator 200 is simplified, and the cost is reduced.

Example three:

as shown in fig. 4, the composite insulator according to the third embodiment of the present invention includes an inner core 301 made of glass fiber reinforced plastic material, wherein the inner core 301 is formed by arranging a plurality of core rods 313, and the core rods 313 are formed by pultrusion of glass fiber reinforced plastic material. The end of the inner core 301 is provided with a plurality of rod-shaped fixing pieces 303, and the fixing pieces 303 and the core rod 313 are arranged together and uniformly arranged along the circumferential direction of the inner core 301. The end of the fastener 303 at the end of the core 301 is provided with a second threaded hole 307, and the second threaded hole 307 has an internal thread (not shown). The end of the core 301 is further provided with a flange (not shown) having a first threaded hole (not shown) that mates with the second threaded hole 307. The flange and the fixing member 303 are fixed by bolts screwed into the first and second screw holes 307. A plurality of core rods 313 are bound to the winding layer 304 formed by winding glass fibers outside the fixing member 303. A shed (not shown) is injected over the wrap 304. The flanges are glued to the ends of the core 301 wrapped with the wrapping 304 and injected with the shed. The end of the flange remote from the end of the composite insulator is a first end, the end of the fixing member 303 remote from the end of the composite insulator is a second end 309, and the first end and the second end 309 are not flush with each other in the longitudinal direction of the core 301.

In the composite insulator of the embodiment, the flange and the fixing piece 303 fixed with the flange 302 are simultaneously fixed at the end part of the inner core 301, so that the bonding strength between the composite insulator and the flange is improved. Since the winding layer 304 winds the core rod 313 and the fixing member 303 as a whole, the bonding strength of the core 301 and the fixing member 303 is improved. Since the first end and the second end 309 are not flush with each other in the longitudinal direction of the core 301, the stress points of the first end and the second end 309 on the winding layer 304 are staggered, and the influence of the coincidence of the two stress points on the mechanical strength of the composite insulator is prevented.

While the invention has been described with reference to the above disclosure, it will be understood by those skilled in the art that various changes and modifications in the above-described structures and materials, including combinations of features disclosed herein either individually or in any combination, will be apparent to one skilled in the art from the disclosure herein. These variants and/or combinations fall within the technical field of the present invention and are intended to be protected by the following claims.

Claims

1. The utility model provides a composite insulator, includes the inner core and connects the flange at inner core both ends, its characterized in that: the end part of the inner core is further provided with a fixing piece, a winding layer is arranged outside the inner core, the winding layer is wound on the inner core, the winding layer has the function of fixing the fixing piece and the inner core, and the fixing piece is fixed on the flange.

2. The composite insulator of claim 1, wherein: the composite insulator further comprises an umbrella skirt, and the umbrella skirt is coated outside the winding layer.

3. The composite insulator of claim 1, wherein: the fixing piece is arranged on the outer surface of the end part of the inner core, and the winding layer positioned at the end part of the inner core is directly wound on the fixing piece.

4. The composite insulator of claim 3, wherein: the fixing piece is provided with a cylindrical structure sleeved at the end part of the inner core.

5. The composite insulator of claim 3, wherein: and the part of the fixing piece, which is in contact with the winding layer, is subjected to rough treatment.

6. The composite insulator of claim 1, wherein: one end of the fixing piece, which is far away from the end part of the inner core, and one end of the flange, which is far away from the end part of the inner core, are arranged in a staggered manner in the axis direction of the inner core.

7. The composite insulator of claim 1, wherein: the fixing piece is rod-shaped.

8. The composite insulator of claim 7, wherein: the composite insulator comprises at least two fixing pieces, wherein the fixing pieces are uniformly arranged at the end part of the inner core in the circumferential direction.

9. The composite insulator of claim 8, wherein: the inner core is formed by arranging a plurality of core rods, and the fixing piece and the core rods are wound into a whole through the winding layer.