CN210182154U

CN210182154U - Suspension insulator for power transmission line

Info

Publication number: CN210182154U
Application number: CN201921058054.8U
Authority: CN
Inventors: Xiqun Xie; 谢锡群; Tao Xie; 谢涛; Changqi Xiong; 熊长期; Qingfa Peng; 彭清发; Zunnan Zhu; 朱尊男
Original assignee: Pingxiang Qiangsheng Electric Porcelain Manufacturing Co Ltd
Current assignee: Pingxiang Qiangsheng Electric Porcelain Manufacturing Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-03-24
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a transmission line suspension insulator belongs to the insulator field, and transmission line suspension insulator includes that porcelain spare, cover establish the steel foot in the inside cavity of head at iron cap, the one end connection on porcelain spare's head, and the inner wall protrusion of head is provided with two at least card protruding portions, and the upper end of steel foot is provided with two at least card hook portions, two at least card hook portions respectively with two at least card protruding portion block. The utility model discloses a transmission line suspension insulator can realize the connection steadiness between increase steel foot and the porcelain spare, and reinforcing insulator tensile strength prevents simultaneously that the steel foot from appearing crooked before the adhesive does not solidify.

Description

Suspension insulator for power transmission line

Technical Field

The utility model relates to an insulator field especially relates to a transmission line suspension insulator.

Background

The suspension insulator is generally formed by gluing or mechanically clamping an insulating part (such as a porcelain part and a glass part) and a metal accessory (such as a steel pin, an iron cap and the like). Insulators are widely used in power systems, generally belong to external insulation, and operate under atmospheric conditions. The buses of overhead transmission lines, power plants and substations and the external live conductors of various electrical equipment are supported by insulators and insulated from the earth (or ground) or other conductors having potential differences. The suspension insulator is used for hanging wires and insulating iron towers, and the produced suspension porcelain insulator is used on high-voltage, ultrahigh-voltage and extra-high-voltage transmission lines all over the world, so that the safe operation of the transmission lines of all countries is reliably guaranteed.

The steel foot of the existing high-voltage suspension porcelain insulator is usually connected with the inner wall of the head part only through an adhesive, and because the steel foot continuously bears tension during working, the stress between the steel foot and the porcelain piece is large, the stability of the porcelain insulator is poor, and the porcelain insulator is easy to loosen.

Meanwhile, when the steel feet are connected in the inner cavity of the head through the adhesive, the steel feet are easy to deflect before the adhesive is not solidified, and the product quality is affected.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that a transmission line suspension insulator is provided to realize the connection steadiness between increase steel foot and the porcelain piece, strengthen the tensile strength of the insulator, prevent the steel foot from appearing crooked before the adhesive does not solidify simultaneously.

The utility model adopts the technical proposal that:

the utility model provides a pair of transmission line suspension insulator, establish including porcelain spare, cover iron cap, one end on the head of porcelain spare are connected steel foot in the inside cavity of head, the inner wall protrusion of head is provided with two at least card protruding portions, the upper end of steel foot is provided with two at least card hook portion, two at least card hook portion respectively with two at least card protruding portion block.

As a further improvement of the present scheme, at least two of the protruding clamping portions are uniformly distributed along the circumferential direction of the inner wall of the head portion, the position distribution of at least two of the hooking portions is matched with the position distribution of at least two of the protruding clamping portions, and a channel for the hooking portion to extend into the inner cavity of the head portion is formed between every two adjacent protruding clamping portions.

As a further improvement of the scheme, a clamping groove is formed in the upper surface of the clamping convex part, the clamping hook part is of a hook shape extending in a downward bending mode, and the end part of the clamping hook part is clamped with the clamping groove.

As a further improvement of the present solution, the side wall of the locking protrusion is an inclined surface inclined downward from the side wall of the head toward the axis direction of the head, and a section of the steel leg corresponding to the side wall of the locking protrusion is a taper whose radius gradually decreases from top to bottom.

As a further improvement of the scheme, a fixed abutting piece is arranged on the steel foot and is positioned below the clamping convex part.

As a further improvement of the scheme, the fixed abutting pieces are circumferentially provided with a plurality of fixed abutting pieces along the outer wall of the steel foot, and the fixed abutting pieces are fan-shaped.

As a further improvement of the scheme, the porcelain piece comprises the head part and an umbrella part arranged at the lower end of the head part, and the umbrella part comprises an outer umbrella cover connected to the lower end of the head part and a plurality of annular umbrella skirts arranged on the inner wall of the outer umbrella cover.

As a further improvement of the scheme, the diameters of the annular sheds are gradually reduced from the outer wall of the outer umbrella cover to the axial direction of the outer umbrella cover.

As a further improvement of the scheme, the annular sheds are gradually shortened from the outer wall of the outer canopy to the axial direction of the outer canopy.

As a further improvement of the scheme, the outer diameter of the head part is gradually increased from bottom to top, and the inner diameter of the iron cap is gradually increased from bottom to top.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pair of transmission line suspension insulator sets up the card convex part through the head inner wall at the porcelain spare to set up hook portion in the upper end of steel foot, through hook portion and card convex part block, when the steel foot is drawn, because of hook portion and card convex part hook closure, can prevent that the pine from appearing taking off the steel foot, increased the cohesion between porcelain spare and the steel foot.

Meanwhile, when the adhesive is full of the inner cavity of the head and is not solidified, the deviation and the deflection of the steel pin can be prevented due to the clamping of the clamping hook part and the clamping convex part, a positioning piece is not required to be additionally arranged to position the steel pin, and the product quality is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a suspension insulator for a power transmission line according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view A-A of FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a steel foot according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view B-B of FIG. 3 according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional structure view of fig. 3C-C provided in an embodiment of the present invention.

In the figure:

1. a porcelain piece; 11. a head portion; 3. an iron cap; 2. a steel foot; 111. a snap projection; 21. a hook portion; 1110. a card slot; 22. fixing the abutting sheet; 12. an umbrella part; 121. an outer canopy; 122. an annular umbrella skirt; 4. and (3) an adhesive.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings and technical solutions needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 5, the suspension insulator for power transmission line provided by this embodiment includes a porcelain 1, an iron cap 3, and a steel leg 2, the porcelain 1 includes a head 11 and an umbrella 12 disposed at a lower end of the head 11, the head 11 and the umbrella 12 are integrally formed, the iron cap 3 is sleeved on the head 11 of the porcelain 1, an inner wall of the iron cap 3 is connected with an outer wall of the head 11 through an adhesive 4, an upper end of the steel leg 2 is connected in an inner cavity of the head 11 through the adhesive 4, the adhesive 4 is preferably a cement river sand adhesive, the cost is low, the bonding force with the porcelain is high, the umbrella 12 includes an outer umbrella cover 121 connected to the lower end of the head 11 and a plurality of annular umbrella skirts 122 disposed on an inner wall of the outer umbrella cover 121, the creepage distance can be increased, at least two clamping convex portions 111 are convexly disposed on the inner wall of the head 11, the clamping convex portions 111 are integrally formed with the head 11, at least two clamping hook portions 21 are disposed, the clamping hook parts 21 and the steel feet 2 are integrally formed, the at least two clamping hook parts 21 are respectively clamped with the at least two clamping convex parts 111, when the steel feet 2 are pulled, the clamping hook parts 21 are hooked with the clamping convex parts 111, the steel feet 2 can be prevented from loosening, the binding force between the porcelain piece 1 and the steel feet 2 is increased, and the tensile property of the suspension insulator of the power transmission line is improved. Meanwhile, when the adhesive is full of the inner cavity of the head 11 and is not solidified, the steel pin 2 can be positioned due to the clamping of the clamping hook part 21 and the clamping convex part 111, so that the steel pin 2 is prevented from being deviated and inclined, a positioning piece is not required to be additionally arranged to position the steel pin 2, and the product quality is ensured.

Specifically, the at least two snap protrusions 111 are uniformly distributed along the circumferential direction of the inner wall of the head 11, the position distribution of the at least two snap hook portions 21 is matched with the position distribution of the at least two snap protrusions 111, and a channel for the snap hook portions 21 to extend into the inner cavity of the head 11 is formed between two adjacent snap protrusions 111. In this embodiment, it is preferable that the two clamping convex portions 111 are symmetrically arranged, the two clamping hook portions 21 are correspondingly symmetrically arranged, when the device is installed, the upper end of the steel leg 2 extends into the head portion 11, a channel is formed between the clamping convex portions 111 and the inner wall of the head portion 11, the clamping hook portions 21 extend upwards to the innermost portion of the head portion 11 along the channel, and meanwhile, the steel leg 2 is rotated to enable the two clamping hook portions 21 to respectively rotate to be clamped with the two clamping convex portions 111, and then the adhesive is injected.

In order to further enhance the combining force between the hook portion 21 and the protruding portion 111, further, an arc-shaped slot 1110 is disposed on the upper surface of the protruding portion 111, the hook portion 21 is a hook shape extending in a downward bending manner, and the end portion of the hook portion 21 is hooked with the slot 1110, so that the combining force between the hook portion 21 and the protruding portion 111 is firmer.

In order to further enhance the bonding force between the steel leg 2 and the head 11, further, the side wall of the locking protrusion 111 is set to be an inclined surface which is inclined downwards from the side wall of the head 11 towards the axis direction of the head 11, a section of the steel leg 2 corresponding to the side wall of the locking protrusion 111 is set to be a cone with a radius gradually decreasing from top to bottom, when the adhesive is filled in the inner cavity of the head 11, the side wall of the steel leg 2 is tightly clamped with the locking protrusion 111, and the bonding stability and integrity between the steel leg 2 and the head 11 are effectively improved.

Furthermore, a fixing abutting piece 22 is arranged on the steel leg 2 in the inner cavity of the head 11, the fixing abutting piece 22 is located below the clamping convex portion 111, the fixing abutting piece 22 can abut against the clamping convex portion 111 to position the steel leg 2, the steel leg 2 is prevented from being inclined, and meanwhile, the fixing abutting piece 22 is combined with the head 11, so that the steel leg 2 is combined with the head 11 more firmly. Furthermore, the fixed resisting pieces 22 are circumferentially arranged along the outer wall of the steel leg 2, and the fixed resisting pieces 22 are fan-shaped.

For the creepage distance of increase transmission line suspension insulator, furtherly, the diameter of a plurality of annular parachute skirt 122 is diminished towards the axis direction of outer parachute cover 121 by the outer wall of outer parachute cover 121 gradually, and a plurality of annular parachute skirt 122 is shortened towards the axis direction of outer parachute cover 121 by the outer wall of outer parachute cover 121 gradually, and outer parachute cover 121 can cover a plurality of annular parachute skirt 122, prevents that a plurality of annular parachute skirt 122 from receiving dirt.

For the combination steadiness between reinforcing head 11 and porcelain spare 1, further, the external diameter of head 11 is by lower supreme grow gradually, and the internal diameter of iron cap 3 is by lower supreme grow gradually, and it is tight to offset through the adhesive between 3 inner walls of iron cap and the 11 outer walls of head, combines more firmly, effectively strengthens tensile properties.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a transmission line suspension insulator, includes porcelain spare (1), cover and establishes iron cap (3), one end on head (11) of porcelain spare (1) are connected steel foot (2) in the internal cavity of head (11), its characterized in that:

at least two clamping convex parts (111) are convexly arranged on the inner wall of the head part (11);

the upper end of the steel foot (2) is provided with at least two clamping hook parts (21);

the at least two hook portions (21) are engaged with the at least two protruding portions (111), respectively.

2. The transmission line suspension insulator of claim 1, wherein:

at least two clamping convex parts (111) are uniformly distributed along the circumferential direction of the inner wall of the head part (11);

the position distribution of the at least two clamping hook parts (21) is matched with the position distribution of the at least two clamping convex parts (111);

a channel for the hook part (21) to extend into the inner cavity of the head part (11) is formed between two adjacent clamping convex parts (111).

3. The transmission line suspension insulator of claim 1, wherein:

a clamping groove (1110) is formed in the upper surface of the clamping convex part (111);

the hook part (21) is in a hook shape which is bent and extended downwards;

the end part of the hook part (21) is clamped with the clamping groove (1110).

4. The transmission line suspension insulator of claim 1, wherein:

the side wall of the convex clamping part (111) is an inclined surface which is formed by inclining the side wall of the head part (11) downwards towards the axial direction of the head part (11);

one section of the steel foot (2) corresponding to the side wall of the clamping convex part (111) is set to be a cone with the radius gradually reduced from top to bottom.

5. The transmission line suspension insulator of claim 1, wherein:

the steel feet (2) are provided with fixed resisting pieces (22);

the fixed abutting sheet (22) is positioned below the clamping convex part (111).

6. The transmission line suspension insulator of claim 5, wherein:

a plurality of fixed resisting sheets (22) are arranged along the circumferential direction of the outer wall of the steel foot (2);

the fixed abutting pieces (22) are all in a fan shape.

7. The transmission line suspension insulator of claim 1, wherein:

the porcelain piece (1) comprises a head part (11) and an umbrella part (12) arranged at the lower end of the head part (11);

the umbrella part (12) comprises an outer umbrella cover (121) connected to the lower end of the head part (11) and a plurality of annular umbrella skirts (122) arranged on the inner wall of the outer umbrella cover (121).

8. The transmission line suspension insulator of claim 7, wherein:

the diameters of the annular sheds (122) are gradually reduced from the outer wall of the outer canopy (121) to the axial direction of the outer canopy (121).

9. The transmission line suspension insulator of claim 8, wherein:

the annular sheds (122) are gradually shortened from the outer wall of the outer canopy (121) to the axial direction of the outer canopy (121).

10. The transmission line suspension insulator of claim 1, wherein:

the outer diameter of the head part (11) is gradually increased from bottom to top;

the inner diameter of the iron cap (3) is gradually increased from bottom to top.