CN112885543B - Post insulators and composite crossarms - Google Patents

Abstract

The application discloses a post insulator and a composite cross arm, wherein the post insulator comprises an insulator, an umbrella skirt and a post connecting fitting, wherein the umbrella skirt is coated on the periphery of the insulator, one end of the insulator is connected with the post connecting fitting to mount the post insulator on a tower body, the post connecting fitting comprises an end flange cylinder which is arranged in a hollow structure along the axial direction and sleeved at one end of the insulator, an end flange plate which covers the end of the end flange cylinder far away from the insulator, and a first mounting plate, wherein the end of the first mounting plate is abutted with the disc surface of the end flange plate far away from the end flange cylinder and is used for being connected with the tower body so as to realize the mounting of the post insulator. The application can improve the strength of the post insulator and prolong the service life of the post insulator.

Description

Post insulator and composite cross arm

Technical Field

The application relates to the technical field of power transmission, in particular to a post insulator and a composite cross arm.

Background

The composite material has the advantages of light weight, high strength, corrosion resistance, easy processing, designability, good insulating property and the like, is one of ideal materials for constructing a transmission tower structure, and the tower prepared from the composite material has the advantages of light weight, small size of the tower head, light structure, easy processing and forming, low transportation and assembly cost, corrosion resistance, high and low temperature resistance, high strength, small possibility of being stolen, low line maintenance cost and the like.

The inventors of the present application have found that the performance of towers currently made of composite materials is to be improved. For example, the composite cross arm is generally formed by combining a post insulator and a cable-stayed insulator, and although the composite cross arm comprises a single-post structure, a single-post single-pull structure, a double-post single-pull structure and the like, the stability and the service life of the composite cross arm of the forms still need to be improved.

Disclosure of Invention

The application aims to provide a post insulator and a composite cross arm, which can improve the strength of the post insulator and prolong the service life of the post insulator.

The technical scheme includes that the post insulator is characterized by comprising an insulator, umbrella skirts, post connecting fittings and post connecting fittings, wherein the umbrella skirts are wrapped on the periphery of the insulator, one end of the insulator is connected with the post connecting fittings to mount the post insulator on a tower body, the post connecting fittings comprise end flange cylinders which are arranged to be hollow structures along the axial direction and sleeved on one end of the insulator, end flange plates are arranged on the end portions, far away from the insulator, of the end flange cylinders in a sealing mode, and first mounting plates are abutted to disc surfaces, far away from the end flange cylinders, of the first mounting plates and are used for being connected with the tower body to mount the post insulator.

The end part of the end flange barrel far away from the post insulator is provided with the end flange sealing cover, so that the post insulator can be prevented from being corroded by external water vapor and the like, and the service life of the post insulator is prolonged.

The first mounting plate is provided with a through hole for the fastener to penetrate through so as to mount the first mounting plate on the tower body.

Above-mentioned set up the through-hole on first mounting panel, can be convenient for utilize the fastener to install first mounting panel to the body of the tower.

The first mounting plates are straight plates, the number of the first mounting plates is two, the two first mounting plates are arranged in parallel, and the two first mounting plates are vertically arranged on the end flange plate.

The number of the first mounting plates is two, so that the connection strength between the post insulator and the tower body can be enhanced.

The support connecting fitting further comprises a second mounting plate detachably connected with the first mounting plate and used for connecting the first mounting plate with the tower body.

Above-mentioned setting second mounting panel can dismantle with first mounting panel and be connected for can set up first mounting panel and be connected with the body of a tower directly according to the demand of difference, perhaps set up first mounting panel and be connected with the body of a tower through the second mounting panel, and then make the structure of pillar insulator nimble changeable.

The first mounting plate is a straight plate, the second mounting plate is a bending plate, one end of the second mounting plate is attached to the first mounting plate, and the other end of the second mounting plate is attached to a cross beam on the tower body.

Above-mentioned setting up the second mounting panel and being the bending plate, and the one end and the laminating of first mounting panel of second mounting panel, the crossbeam laminating on the other end and the body of a tower can guarantee the joint strength of body of a tower and pillar insulator.

The insulator is a solid insulating core body or is a hollow insulating tube, insulating gas is sealed in the hollow insulating tube, and the absolute pressure value range of the insulating gas is 0.1-0.15 MPa.

The insulator is arranged as the hollow insulating tube, and the insulating gas with the absolute pressure value range of 0.1-0.15 MPa is sealed in the hollow insulating tube, so that the daily maintenance and monitoring of the post insulator can be avoided.

The umbrella skirt comprises a plurality of umbrella bodies which are arranged at intervals and are identical, and the umbrella bodies are symmetrical relative to the insulator in the radial direction.

The umbrella is radially symmetrical relative to the insulator, which is beneficial to self-cleaning of the umbrella skirt and ensures that the post insulator has the characteristics of pollution resistance, rain and flash resistance, ice flash resistance and the like.

In order to solve the technical problems, the composite cross arm comprises the post insulator and the cable-stayed insulator, wherein one end of the cable-stayed insulator is connected with one end of the insulator, which is not connected with the tower body, through an end fitting, the end fitting comprises at least two flange cylinders which are coaxially arranged and sequentially connected, the at least two flange cylinders are sleeved on the periphery of the insulator, one of the flange cylinders is connected with the cable-stayed insulator, and the connection between the post insulator and the cable-stayed insulator and the smoothness of the outer peripheral surface of one of the flange cylinders are realized.

The outer peripheral surface of one flange cylinder is smooth, so that the end fitting can be mounted on the post insulator by adopting a crimping process, the production efficiency of the composite cross arm can be improved, the production cost of the composite cross arm can be reduced, and meanwhile, compared with the cementing process, the mechanical property of the produced post insulator is better by adopting the crimping process.

Wherein two adjacent flange cylinders are detachably connected.

The two adjacent flange cylinders are detachably connected, so that the end fitting can be simultaneously connected with the cable-stayed insulator by adopting a crimping process, and favorable conditions are provided for the connection of the end fitting, and meanwhile, the end fitting can be separated in the transportation process, so that the transportation can be facilitated.

The periphery of the end parts of the two flange cylinders which are detachably connected are sleeved with flange plates, and the two adjacent flange plates are detachably connected to realize the detachable connection of the two adjacent flange cylinders.

The two adjacent flange plates are detachably connected to realize the detachable connection of the two adjacent flange cylinders, so that the contact area of the two adjacent flange cylinders can be indirectly increased, and the connection strength of the two adjacent flange cylinders is ensured.

The application has the beneficial effects that the end flange barrel of the end flange plate sealing cover in the pillar connecting fitting is arranged at the end far away from the pillar insulator, so that the pillar insulator can be prevented from being corroded by external water vapor and the like, and the service life of the pillar insulator is prolonged.

Simultaneously set up the second mounting panel and can dismantle with first mounting panel and be connected for can set up first mounting panel and be connected with the body of a tower directly according to the demand of difference, perhaps set up first mounting panel and be connected with the body of a tower through the second mounting panel, and then make the structure of pillar insulator nimble changeable.

And meanwhile, the second mounting plate is a bending plate, one end of the second mounting plate is attached to the first mounting plate, the other end of the second mounting plate is attached to the cross beam on the tower body, and the connection strength of the tower body and the post insulator can be ensured.

In addition, the outer peripheral surface of one flange cylinder in the end fitting is smooth, so that the end fitting can be mounted on the post insulator by adopting a crimping process, compared with the prior art that the end fitting is mounted on the post insulator by adopting a cementing process, the production efficiency of the composite cross arm can be improved, the production cost of the composite cross arm can be reduced, and meanwhile, compared with a cementing process, the crimping process is better in mechanical performance of the produced post insulator.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

Fig. 1 is a schematic structural diagram of an embodiment of a power transmission tower according to the present application;

FIG. 2 is a schematic view of the structure of the composite cross arm of FIG. 1;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a schematic view of the post insulator of FIG. 2 connected to an end fitting;

FIG. 5 is a schematic cross-sectional view of the structure of FIG. 4 taken along section C-C;

fig. 6 is a schematic structural view of the end fitting of fig. 3;

Fig. 7 is a schematic structural view of the end fitting in fig. 3 at another view angle;

Fig. 8 is a schematic structural diagram of a wire hanging board in an application scenario when the wire hanging board is connected with a wire clamp;

FIG. 9 is a schematic view of the structure of the yoke plate;

fig. 10 is a schematic cross-sectional view of the end fitting of fig. 7 taken along section D-D;

FIG. 11 is an enlarged schematic view at E in FIG. 10;

FIG. 12 is an enlarged schematic view of FIG. 10 at F in an application scenario;

FIG. 13 is an enlarged schematic view of FIG. 10 at F in another application scenario;

FIG. 14 is an enlarged schematic view at B in FIG. 2;

FIG. 15 is an enlarged schematic view at H in FIG. 1;

FIG. 16 is an enlarged schematic view at I in FIG. 2;

FIG. 17 is a schematic view of a composite cross arm in another embodiment;

FIG. 18 is an enlarged schematic view at G in FIG. 17;

fig. 19 is a schematic structural view of the end fitting of fig. 18;

Fig. 20 is a schematic view of an exploded structure of the end fitting of fig. 19;

fig. 21 is a schematic structural view of another embodiment of the power transmission tower of the present application;

FIG. 22 is a schematic view of a portion of the structure of FIG. 21;

FIG. 23 is an enlarged schematic view at J in FIG. 22;

FIG. 24 is a schematic view of a portion of the structure of FIG. 21;

Fig. 25 is a schematic structural view of an embodiment of an end fitting of the present application;

fig. 26 is a schematic structural view of an embodiment of the composite cross arm of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1 to 3, a power transmission tower 1000 includes a tower body 1100 and a composite cross arm 1200 connected to the tower body 1100, and the composite cross arm 1200 includes a post insulator 1210 and a cable-stayed insulator 1220.

The tower body 1100 may be a power transmission tower structure of a lattice type iron tower, a rod body or a composite material tower and other common structures, and in this embodiment, the tower body 1100 is a lattice type iron tower, wherein only a part of the structure is shown in the drawings.

One end of the post insulator 1210 is connected to one end of the cable-stayed insulator 1220, and the other end is connected to the tower body 1100 through the end fitting 1230, in this embodiment, the number of the post insulators 1210 is one, the number of the cable-stayed insulators 1220 is at least two, for example, two, three, four or even more, the at least two cable-stayed insulators 1220 are arranged at intervals around the post insulator 1210, and the axes of the two cable-stayed insulators 1220 and the axis of the post insulator 1210 are in the same plane.

Specifically, at least two cable-stayed insulators 1220 are connected with the pillar insulator 1210 through the end fitting 1230, and meanwhile, the axes of the two cable-stayed insulators 1220 and the axis of the pillar insulator 1210 are in the same plane, so that a stable triangle structure is formed between the composite cross arm 1200 and the tower body 1100, and the stability of the composite cross arm 1200 can be greatly improved.

With continued reference to fig. 2, in the present embodiment, the number of the cable-stayed insulators 1220 is three, wherein two cable-stayed insulators 1220 whose axes are in the same plane as the axis of the pillar insulator 1210 are defined as first cable-stayed insulators 1221, the remaining cable-stayed insulators 1220 are defined as second cable-stayed insulators 1222, wherein the distances from the second cable-stayed insulator 1222 to the two first cable-stayed insulators 1221 are equal, and the angle range between the two first cable-stayed insulators 1221 is 45 ° to 90 °, for example, 45 °, 60 ° or 90 °, and the angle range between the second cable-stayed insulator 1222 and the pillar insulator 1210 is 25 ° to 45 °, for example, 25 °, 30 °, 35 ° or 45 °.

Specifically, considering that the larger the angle between the two first cable-stayed insulators 1221 is, the larger the mechanical strength that the composite cross arm 1200 can bear, but the length of the composite cross arm 1200 and the width of the tower body 1100 also need to be correspondingly increased, so the included angle range of the two first cable-stayed insulators 1221 is controlled to be 45-90 °, which not only meets the stress requirement of the composite cross arm 1200, but also makes the length of the composite cross arm 1200 and the width of the tower body 1100 optimal. Similarly, the second cable-stayed insulator 1222 and the pillar insulator 1210 can be controlled to have an included angle ranging from 20 ° to 45 °.

Specifically, three sets of composite cross arms (not shown) are sequentially disposed on the tower body 1100 from top to bottom, and the lengths of the three sets of composite cross arms are decreasing or increasing or other forms, that is, the lengths of the pillar insulators are decreasing or increasing or other forms from bottom to top, and the larger the length of the pillar insulator 1210, the smaller the included angle between the two first cable-stayed insulators 1221. Assuming that the included angle between the two first cable-stayed insulators 1221 is α, the length of the pillar insulator 1210 is L, the width of the tower body 1100 perpendicular to the pillar insulator in the horizontal direction is D, the width of the tower body 1100 parallel to the pillar insulator 1210 in the horizontal direction is n, and the distance between the connection point of the two first cable-stayed insulators 1221 extending out of the tower body 1100 and the tower body 1100 is m, which can be obtained by a triangular formula:

in an application scenario, taking 220kV power transmission tower 1000 as an example, L ranges from 2000mm to 4000mm, D ranges from 2000mm to 3000mm, m is generally set to 1000mm, n is generally set to 1000mm, so that the minimum value of alpha is 47.9 degrees, the maximum value of alpha is 90 degrees, and the included angle range of two first cable-stayed insulators 1221 can be controlled to 45-90 degrees due to the fact that the sizes of m and n can be adjusted.

Similarly, assuming that the angle between the second cable-stayed insulator 1222 and the pillar insulator 1210 is β, and assuming that the distance between the connection point of the pillar insulator 1210 on the tower body 1100 and the connection point of the second cable-stayed insulator 1222 on the tower body 1100 is H, it can be obtained by the triangular formula:

Taking 220kV power transmission tower 1000 as an example, H is generally set to 2000mm, so that the minimum value of beta is 26.6 degrees, the maximum value of beta is 45 degrees, and the included angle between the post insulator 1210 and the adjacent cable-stayed insulator 1220 can be controlled to be 25-45 degrees because the size of H can be adjusted again.

Setting the angle range between the two first cable-stayed insulators 1221 to 45 ° to 90 ° can provide advantages for setting a first equalizing ring (not shown) and an end fitting 1230 on the high-voltage end (the end far from the tower body 1100) of the post insulator 1210, setting a second equalizing ring 12201 on the high-voltage end (the end far from the tower body 1100) of the two first cable-stayed insulators 1221, and specifically, can ensure that the first equalizing ring on the post insulator 1210 and the second equalizing ring 12201 on the first cable-stayed insulator 1221 do not interfere with each other, the second equalizing ring 12201 on the two first cable-stayed insulators 1221 do not interfere with the end fitting 1230, and the first equalizing ring on the post insulator 1210, the second equalizing ring 12201 on the first cable-stayed insulator 1221 do not interfere with each other.

And setting the angle range between the second cable-stayed insulator 1222 and the pillar insulator 1210 to 25 ° to 45 °, it may provide advantages for setting the first equalizing ring on the high-voltage end of the pillar insulator 1210 and setting the third equalizing ring 12202 on the high-voltage end (the end far from the tower body 1100) of the second cable-stayed insulator 1222, specifically, it may be ensured that the first equalizing ring set on the pillar insulator 1210 and the third equalizing ring 12202 set on the second cable-stayed insulator 1222 do not interfere during the dislocation installation.

With continued reference to fig. 1 and 2, in the present embodiment, the post insulator 1210 and the two first cable-stayed insulators 1221 are installed at the same height, while the second cable-stayed insulator 1222 is located above the post insulator 1210. In other embodiments, when the number of the second cable-stayed insulators 1222 is more than one, the second cable-stayed insulators 1222 may be disposed above and below the pillar insulator 1210, so that the tension of the power transmission line in each direction may be balanced.

The post insulators 1210 may be horizontally disposed (illustrated in fig. 1) or may be inclined.

Meanwhile, in order to ensure that the composite cross arm 1200 is uniformly stressed, the angles between the two first cable-stayed insulators 1221 and the pillar insulator 1210 are equal, that is, the axis of the second cable-stayed insulator 1222 and the axis of the pillar insulator 1210 are in the same vertical plane.

Of course, in other embodiments, the angles between the two first cable-stayed insulators 1221 and the pillar insulator 1210 may be unequal, which is not limited herein.

Referring to fig. 4 and 5, in the present embodiment, the post insulator 1210 includes an insulator 1211 and a skirt 1212 wrapped around the insulator 1211.

Specifically, the insulator 1211 may be a solid insulating core body or a hollow insulating tube, where when the insulator 1211 is a solid insulating core body, it may be a solid core rod formed by winding glass fiber or aramid fiber impregnated epoxy resin, or by pultrusion or pultrusion winding, and when the insulator 1211 is a hollow insulating tube, it may be a hollow pultrusion tube formed by winding glass fiber or aramid fiber impregnated epoxy resin, or a glass fiber reinforced plastic tube formed by winding glass fiber impregnated epoxy resin, or an aromatic fiber tube formed by winding aramid fiber impregnated epoxy resin, or by winding it, which is not limited herein.

Wherein insulator 1211 may be cylindrical (illustrated as cylindrical in the figures), conical, or other shape (e.g., drum-shaped), without limitation. When the insulator 1211 has a conical shape, a tapered end (an end with a smaller diameter) thereof is connected to the end fitting 1230, and the other end is connected to the tower 1100.

In an application scenario, when the insulator 1211 is a hollow insulating tube, the insulator 1211 is sealed with an insulating gas, and the absolute pressure of the insulating gas ranges from 0.1Mpa to 0.15Mpa, for example, 0.1Mpa, 0.12Mpa, or 0.15Mpa.

Specifically, the gas sealed in the hollow insulating tube may be high-purity nitrogen gas, air or sulfur hexafluoride gas subjected to drying treatment, and the like, and is not limited herein.

Meanwhile, the absolute pressure value range of the insulating gas is set to be 0.1-0.15 mpa, so that the insulating gas is not easy to leak from the hollow insulating tube, daily maintenance and monitoring of the post insulator 1210 are avoided, and different pressure use requirements existing between different regions and altitudes can be met, so that the hollow insulating tube is ensured to be in a non-negative pressure state when being used in different regions, meanwhile, the hollow insulating tube can be provided with a larger micro-water control margin, and the difficulty of micro-water control is effectively reduced.

In other applications, when the insulator 1211 is a hollow insulating tube, the inside thereof may be sealed with an inert gas or a solid material such as polyurethane, liquid silicone rubber, etc., which is not limited thereto.

Meanwhile, the umbrella skirt 1212 can be made of high-temperature vulcanized silica gel, liquid silicone rubber or room temperature vulcanized silicone rubber, and the like, and is not limited herein.

In an application scenario, the umbrella skirt 1212 includes a plurality of umbrella bodies which are arranged at intervals and are identical, i.e. all umbrella bodies are identical, and the umbrella bodies are symmetrical in radial direction relative to the insulator 1211, i.e. the two surfaces of the umbrella bodies which are arranged at the back of the umbrella bodies are opposite in inclination direction and have the same inclination angle. Specifically, the umbrella body is arranged to be radially symmetrical with respect to the insulator 1211, on one hand, compared with the two surfaces of the umbrella body which are arranged at the back of the umbrella body in the prior art, the umbrella body is inclined towards the same direction, so that rainwater can flow down along the umbrella skirt 1212 (if the two surfaces of the umbrella body which are arranged at the back of the umbrella body are inclined towards the same direction, the rainwater is easy to accumulate in an included angle between the pillar insulator 1210 and the umbrella body), a water film is not formed on the surface of the umbrella skirt 1212, the self-cleaning of the umbrella skirt 1212 is facilitated, and on the other hand, the two sides of the umbrella body which are arranged at the back of the umbrella body have the same mechanical properties, so that the pillar insulator 1210 has the characteristics of pollution resistance, rain flash resistance, ice flash resistance, economy and the like.

In an application scenario, in order to avoid bridging caused by turbulence and dirt accumulation between two adjacent umbrella bodies, the distance between two adjacent umbrella bodies is greater than 40mm and not more than 60mm, for example 45mm, 50mm or 60mm. Of course, the distance between two adjacent umbrella bodies should be reduced as much as possible, so that the distribution density of the umbrella bodies can be increased, birds are inconvenient to stand on the sheath, and accordingly, bird accidents are prevented. Meanwhile, under the requirement of ensuring the minimum creepage distance, the height of one side of the umbrella body, which protrudes out of the insulator 1211, is not more than 80mm, and is generally 50 mm-80 mm, for example, 50mm, 60mm or 70 mm.

In other embodiments, the umbrella skirt 1212 may have other structures, for example, two adjacent umbrella bodies have different sizes, or two surfaces of the umbrella bodies disposed on the back face of the umbrella body are inclined in the same direction, and in all, the specific structure of the umbrella skirt 1212 is not limited.

Referring to fig. 3, 6 and 7, in the present embodiment, the end fitting 1230 includes a first flange cylinder 1231, a sealing plate 1232 and a hanger plate 1233.

The first flange cylinder 1231 is axially arranged to be a hollow structure and is used for being sleeved at the end part of the post insulator 1210, in particular for being sleeved at the end part of the insulator 1211 in the post insulator 1210, a sealing plate 1232 seals one end of the first flange cylinder 1231, and a wire hanging plate 1233 is arranged at one side of the sealing plate 1232 far away from the first flange cylinder 1231 and is connected with the sealing plate 1232 for hanging a power transmission line.

Specifically, when the hanging wire plate 1233 for hanging the power transmission line is damaged and the hanging wire plate 1233 is replaced, the sealing plate 1232 seals one end of the first flange cylinder 1231, so that the post insulator 1210 inside the first flange cylinder 1231 can be ensured not to be corroded by external water vapor and the like, and the service life of the post insulator 1210 is ensured.

With continued reference to fig. 6 and 7, one end of the hanger plate 1233 abuts against the plate surface of the sealing plate 1232 on the side far away from the first flange cylinder 1231, and a reinforcing member 1234 is further connected between the side surface of the hanger plate 1233 and the sealing plate 1232.

Specifically, the setting of reinforcement 1234 plays the effect of consolidating the connection between hanging wire board 1233 and shrouding 1232, avoids connecting strength between hanging wire board 1233 and shrouding 1232 inadequately and takes place the fracture.

In an application scenario, as shown in fig. 6, the reinforcement member 1234 is a plate, and the sealing plate 1232, the wire hanging plate 1233 and the reinforcement member 1234 are vertically arranged in pairs.

In order to avoid corrosion of the end fitting 1230 by moisture, the surface of the end fitting 1230 is hot-dip galvanized, and the internal material of the end fitting 1230 may be cast aluminum, cast iron or alloy steel, which is not limited herein.

Meanwhile, the parts of the end fitting 1230 may be connected together by welding or the like.

With continued reference to fig. 6, the hanging board 1233 is provided with a first hanging portion 12331 for hanging the power line. Specifically, the first hanging wire part 12331 is used for installing a wire clip connecting the power transmission line, thereby realizing hanging the power transmission line. The number of the first hanging parts 12331 may be one, two, four or more, which is not limited herein. When the number of the first hanging wire parts 12331 is multiple, the first hanging wire parts 12331 can be respectively provided with a plurality of wire clamps connected with the same power transmission line, so that when one wire clamp is damaged, the safe hanging of the power transmission line can still be ensured.

In an application scenario, as shown in fig. 6, the first hanging portion 12331 is a hanging wire through hole, and a side surface of the hanging wire plate 1233, on which the first hanging portion 12331 is not provided, is connected to the reinforcement 1234. In particular, this arrangement may ensure that the stiffener 1234 is able to not interfere with the installation of clips on the hanger plate 1233.

Meanwhile, in the application scene, the number of the first wire hanging parts 12331 is one, and meanwhile, the wire hanging plate 1233 is further provided with a construction hole 12332 for construction and hoisting. Of course, in other application scenarios, the number of the first hanging wire parts 12331 may be more than one.

In an application scenario, as shown in fig. 8, when the wire hanging plate 1233 is used for hanging a single wire, the wire hanging plate 1233 is connected to the U-shaped hanging ring 123301, specifically, two ends of the U-shaped hanging ring 123301 are connected to the wire hanging plate 1233, and at the same time, the U-shaped hanging ring 123301 is connected to the wire clamp 123302 for hanging the wire.

When the wire hanging plate 1233 is used for hanging two wires, the wire hanging plate 1233 is also connected with the U-shaped hanging ring 123301, but unlike a single wire, the U-shaped hanging ring 123301 is also connected with the middle connecting plate, and then the middle connecting plate is connected with two wire clamps 123302 for hanging wires respectively. In an application scenario, the cross section of the intermediate yoke plate is approximately isosceles triangle, two clips 123302 are respectively connected to two bottom corners of the intermediate yoke plate, and the U-shaped hanging ring 123301 is connected to the top corner of the intermediate yoke plate.

In an application scenario, referring to fig. 9, the composite cross arm 1200 further includes a link plate 1235, where the link plate 1235 is used to connect with the wire hanging plate 1233, and the link plate 1235 is provided with second wire hanging parts 12351 for hanging the power transmission line, where the number of the second wire hanging parts 12351 is greater than the number of the first wire hanging parts 12331. Specifically, the wire hanging plate 1233 allows the number of the first wire hanging parts 12331 to be limited because of the area limitation, and cannot meet the wire hanging requirements in some application scenes, and the arrangement of the connecting plate 1235 can play a role of expanding the number of the first wire hanging parts 12331.

In an application scenario, in order to adapt to the requirements in different application scenarios, the link 1235 is connected to the hanger 1233 through a connection fitting (not shown) with adjustable length, so that the relative distance between the link 1235 and the hanger 1233 can be adjusted according to the requirements in different application scenarios.

In an application scenario, the second hanging wire portion 12351 and the first hanging wire portion 12331 have the same structure, for example, are all through holes, however, the structures of the second hanging wire portion 12351 and the first hanging wire portion 12331 may also be different, for example, the first hanging wire portion 12331 is a through hole, and the second hanging wire portion 12351 is a slot, which is not limited in the specific structures of the first hanging wire portion 12331 and the second hanging wire portion 12351.

Referring to fig. 3, fig. 6, and fig. 7, in the present embodiment, the end fitting 1230 further includes a connection plate 1236, where the connection plate 1236 is disposed on the periphery of the first flange cylinder 1231 and is connected to the first flange cylinder 1231, for connecting the cable-stayed insulator 1220.

Specifically, the connection plate 1236 may be disposed on the periphery of the first flange cylinder 1231 by means such as welding.

Wherein, the connection board 1236 disposed at the periphery of the first flange cylinder 1231 is used to connect the cable-stayed insulator 1220, so that the first flange cylinder 1231 is prevented from being damaged (for example, holes are formed in the first flange cylinder 1231) in order to directly connect the cable-stayed insulator 1220 with the first flange cylinder 1231, thereby ensuring the strength of the first flange cylinder 1231.

In the present embodiment, the number of the connection plates 1236 may be one or at least two. Wherein when the connection plates 1236 are one, in order to connect all the cable-stayed insulators 1220, the connection plates 1236 may extend around the first flange cylinder 1231 to have a semi-surrounding structure or a full-surrounding structure, and when the number of the connection plates 1236 is at least two, different connection plates 1236 may be connected with different cable-stayed insulators 1220, that is, the number of the connection plates 1236 may be equal to the number of the cable-stayed insulators 1220, and at least two connection plates 1236 are disposed at intervals along the circumference of the first flange cylinder 1231 (as shown in fig. 3 and 6).

Referring to fig. 7 and 10, in the present embodiment, the inner wall of the first flange cylinder 1231 is provided with a plurality of glue grooves 12311 disposed along the axial direction at intervals and a flow groove 12312 communicating with the glue grooves 12311, wherein the glue grooves 12311 and the flow groove 12312 are filled with an adhesive to fixedly connect the first flange cylinder 1231 and the insulator 1211.

Specifically, in the production process, the end fitting 1230 and the post insulator 1210 are connected together by adopting a horizontal glue process or a vertical glue process, namely, in the production process, an adhesive is injected between the first flange cylinder 1231 and the insulator 1211 through a glue injection hole, and after a certain time of high-temperature curing, the end fitting 1230 and the post insulator 1210 can be fixedly connected together.

The arrangement of the circulation grooves 12312 can enable the adhesive injected between the first flange cylinder 1231 and the insulator 1211 to circulate between the adjacent adhesive grooves 12311, so that the adhesive injection rate can be improved, the bubble retention risk is reduced, the combination of the end fitting 1230 and the insulator 1211 is firmer, and the torsion resistance of the composite cross arm 1200 can be improved on the premise that the adhesive with better adhesive property is not replaced.

The number of the flow grooves 12312 may be one or plural (for example, two, four, six or more), and when the number of the flow grooves 12312 is plural, the plurality of flow grooves 12312 are arranged at intervals along the circumferential direction of the first flange cylinder 1231. One of the circulation grooves 12312 may be connected to only two adjacent glue grooves 12311, or may be connected to three, four, or even all adjacent glue grooves 12311, which is not limited herein.

Wherein the bottom surface of the flow channel 12312 is a plane or a curved surface. Specifically, when the radial depth and width of the circulation groove 12312 relative to the end fitting 1230 are fixed, the circulation groove 12312 with a planar bottom surface is more complex and more costly to process than the circulation groove 12312 with a curved bottom surface, but has higher torsional strength due to the larger contact area between the adhesive in the planar groove and the inner wall of the first flange cylinder 1231, that is, the circulation groove 12312 with a curved bottom surface is more convenient to process and less costly to process than the circulation groove 12312 with a planar bottom surface, but has slightly lower torsional strength.

As shown in fig. 11, the width of the plurality of glue grooves 12311 is equal, and the width of the glue groove 12311 is smaller than the width of the interval between two adjacent glue grooves 12311. Specifically, the width of the glue groove 12311 is smaller than the width of the interval between two adjacent glue grooves 12311, so that the width of the glue matching groove (not shown in the figure, the glue matching groove on the insulator 1211 is the same as the glue groove 12311 on the first flange cylinder 1231 in specification and is just opposite to the glue matching groove), and compared with the width of the glue matching groove on the insulator 1211, the width of the interval between two adjacent glue matching grooves is larger than or equal to the width of the glue matching groove on the insulator 1211, and the arrangement can ensure the shearing capability of the post insulator 1210.

Wherein the width of the glue groove 12311 is not more than 12mm. Specifically, the insulator 1211 itself has low axial shear strength, and when it is damaged, the first damage is to the portion of the insulator 1211 that is sleeved in the first flange cylinder 1231 and is not bonded by the adhesive, that is, the portion adjacent to the two glue matching grooves. When the width of the first flange cylinder 1231 is fixed, if the width of the glue groove 12311 is reduced, the distance between two adjacent glue grooves 12311 will be increased, that is, the distance between two adjacent glue matching grooves on the insulator 1211 will be increased, the strength of the adjacent glue matching grooves subjected to shearing damage will be increased, and finally the shearing resistance of the post insulator 1210 with the same specification will be enhanced, but if the width of the glue groove 12311 is too small, the processing time and the processing cost will be increased, so that the width of the glue groove 12311 is not more than 12mm, for example, 12mm,10mm or 8mm, and the like, thereby not only ensuring the strength of the composite cross arm 1200, but also ensuring that the processing time and the processing cost are within reasonable ranges.

Wherein, for the convenience of processing, the bottom surface of the glue tank 12311 is a curved surface.

Wherein, the ratio (i.e. the glue ratio) of the length of the contact portion between the inner wall of the first flange cylinder 1231 and the insulator 1211 to the outer diameter of the insulator 1211 is in the range of 0.8-1.2, for example, 0.8, 1.0 or 1.2. Specifically, as the glue ratio decreases, the strength of the composite cross arm 1200 may decrease significantly, for example, compared with a glue ratio of 0.8, when the glue ratio decreases to 0.75, the strength of the composite cross arm 1200 may decrease by 20%, compared with a glue ratio of 1.2, when the glue ratio increases to 1.4, the strength of the composite cross arm 1200 may slightly increase, but the cost may significantly increase, so setting the glue ratio range to 0.8-1.2 may enable the composite cross arm 1200 to have advantages of low cost, high strength, and the like.

It should also be noted that in other embodiments, the glue tank 12311 and the flow-through tank 12312 may be of other dimensions, which are not limited herein.

In an application scenario, referring to fig. 5, 7, 10 and 12, a plate surface of the sealing plate 1232 facing the insulator 1211 is provided with a first sealing groove 12321 facing the end surface of the insulator 1211, and a first sealing member (not shown) is provided in the first sealing groove 12321. Specifically, a first seal is disposed in the first seal groove 12321 for preventing external moisture or adhesive from entering the insulator 1211 to avoid leakage of gas in the insulator 1211, and preventing external moisture or adhesive from entering the seal plate 1232 to affect the seal between the insulator 1211 and the end fittings 1230.

With continued reference to fig. 10 and 12, the inner wall of the first flange cylinder 1231 is further provided with a second sealing groove 12313 adjacent to the sealing plate 1232, the second sealing groove 12313 and the plurality of glue grooves 12311 are sequentially arranged at intervals along a direction away from the sealing plate 1232, and a second sealing member (not shown) is disposed in the second sealing groove 12313. Specifically, the second seal member has a different function from the first seal member, and is used for avoiding that the adhesive in the gluing process enters the first seal groove 12321 to corrode the first seal member, so that the first seal member fails.

Wherein the width of the first seal groove 12321 and/or the second seal groove 12313 remains constant (as shown in fig. 12) or gradually decreases (as shown in fig. 13) in a direction approaching the insulator 1211. Specifically, the first sealing groove 12321, the width of which is kept constant in the direction approaching the insulator 1211, is convenient to process, but the first sealing member therein is easily slid or even dropped, and at this time, in order to avoid the relative sliding of the first sealing member in the first sealing groove 12321, the first sealing member is fixed in the first sealing groove 12321 by resin or silicone adhesive, whereas the first sealing groove 12321, the width of which is gradually reduced in the direction approaching the insulator 1211, is more complicated than the first sealing groove 12321, the width of which is kept constant in the direction approaching the insulator 1211, but it can be ensured that the first sealing member is not easily dropped. The width of the first seal groove 12321 and/or the second seal groove 12313 may be linearly smaller (as shown in fig. 13) or may be curved smaller in the direction approaching the insulator 1211, which is not limited herein.

Referring to fig. 2 and 14, in the present embodiment, the composite cross arm 1200 further includes a diagonal cable connector 1240 for connecting the tower body 1100 and the diagonal cable insulator 1220.

In this embodiment, the length of the cable-stayed connection hardware 1240 connecting the tower body 1100 and the first cable-stayed insulator 1221 is adjustable, and the length of the cable-stayed connection hardware 1240 connecting the tower body 1100 and the second cable-stayed insulator 1222 is fixed, wherein, for convenience of description, the cable-stayed connection hardware 1240 connecting the tower body 1100 and the first cable-stayed insulator 1221 is defined as a first cable-stayed connection hardware 1241, and the cable-stayed connection hardware 1240 connecting the tower body 1100 and the second cable-stayed insulator 1222 is defined as a second cable-stayed connection hardware 1242.

The first cable-stayed connection fitting 1241 includes a first sub-connection fitting 12411 and a second sub-connection fitting 12412.

The first sub-connecting fitting 12411 is connected with the first cable-stayed insulator 1221, one end of the second sub-connecting fitting 12412 is connected with the first sub-connecting fitting 12411 in an adjustable position, and the other end of the second sub-connecting fitting 124is used for connecting the tower body 1100, so that the first cable-stayed insulator 1221 is connected with the tower body 1100. Specifically, one end of the second sub-connecting fitting 12412 is connected to the first sub-connecting fitting 12411 in an adjustable position, so that the structure of the composite cross arm 1200 can be changeable, and the composite cross arm is suitable for different application scenarios.

In an application scenario, as shown in fig. 14, the first sub-connecting fitting 12411 is provided with a plurality of first mounting portions 124111 arranged in an arc shape, and the second sub-connecting fitting 12412 is alternatively connected to a first mounting portion 124111. Specifically, the plurality of first installation portions 124111 are arranged along an arc shape, so that the distance and the relative angle between the tower body 1100 and the first cable-stayed insulator 1221 can be adjusted.

In an application scenario, as shown in fig. 14, the first sub-connection fitting 12411 is a fan-shaped flat-foot fitting, and the second sub-connection fitting 12412 is a slot fitting.

In other embodiments, the plurality of first mounting portions 124111 may be arranged in a straight line along the extending direction of the first diagonal insulator 1221, which is not limited herein.

In other embodiments, the second sub-link 12412 may be connected to the first cable-stayed insulator 1221, and the first sub-link 12411 may be connected to the tower 1100, which is not limited herein.

Meanwhile, in other embodiments, the cable-stayed connection hardware 1240 connecting the tower body 1100 and the first cable-stayed insulator 1221 and the cable-stayed connection hardware 1240 connecting the tower body 1100 and the second cable-stayed insulator 1222 are adjustable in length or not, that is, the cable-stayed connection hardware 1241 may be connected to the tower body 1100 and the first cable-stayed insulator 1221, the cable-stayed connection hardware 1242 may be connected to the cable-stayed connection hardware 1241 may be connected to the cable-stayed connection hardware 1242 may be connected to the cable-stayed body 1100 and the second cable-stayed insulator 1222, and the cable-stayed connection hardware 1242 may be connected to the cable-stayed connection hardware 1241.

Referring to fig. 1,2, 15 and 16, in the present embodiment, the post insulator 1210 further includes a post connecting fitting 1250 for connecting the tower body 1100 and the post insulator 1210, and the post connecting fitting 1250 includes an end flange barrel 1251, an end flange 1252 and a first mounting plate 1253.

The end flange cylinder 1251 is arranged to be of a hollow structure along the axial direction and sleeved at the end part of the post insulator 1210 connected with the tower body 1100, and is specifically sleeved at one end of the insulator 1211, the end flange 1252 covers the end part of the end flange cylinder 1251 far away from the insulator 1211 and is used for preventing the end part of the insulator 1211 from being corroded by external water vapor and the like and protecting the insulator 1211, the end part of the first mounting plate 1253 is abutted with the end part of the end flange 1252 far away from the surface of the end flange cylinder 1251, meanwhile, a second mounting part 12531 is arranged on the first mounting plate 1253 and is used for mounting the first mounting plate 1253 on the tower body 1100, so that the connection of the post insulator 1210 and the tower body 1100 is realized, and in an application field, the second mounting part 12531 is a through hole, and at the moment, the first mounting plate 1253 can be mounted on the tower body 1100 through the through hole by using a fastener such as a bolt.

In an application scenario, as shown in fig. 16, the first mounting plates 1253 are straight plates, and in order to ensure connection firmness between the tower body 1100 and the post insulator 1210, the number of the first mounting plates 1253 is two, and the two first mounting plates 1253 are arranged parallel to each other, however, in other application scenarios, the number of the first mounting plates 1253 may also be one, three, or the like. Also as shown in fig. 16, two first mounting plates 1253 are vertically disposed on the end flange 1252. Of course, in other applications, the first mounting plate 1253 may not be vertically disposed on the end flange 1252, which is not limited herein.

With continued reference to fig. 1 and 15, in order to enable the strut connecting fitting 1250 to adapt to different application scenarios, the strut connecting fitting 1250 further includes a second mounting plate 1254, where the second mounting plate 1254 is detachably connected to the first mounting plate 1253 and is used to connect the first mounting plate 1253 to the tower body 1100, so that the first mounting plate 1253 may be set to be directly connected to the tower body 1100 according to different requirements, or the first mounting plate 1253 may be set to be connected to the tower body 1100 through the second mounting plate 1254.

In an application scenario, as shown in fig. 15, in order to increase the contact area between the second mounting plate 1254 and the tower body 1100, the connection strength between the second mounting plate 1254 and the tower body 1100 is ensured, the second mounting plate 1254 is a bending plate, one end of the second mounting plate 1254 is attached to a beam on the tower body 1100, and the other end is attached to the first mounting plate 1253.

In an application scenario, referring to fig. 15 and 16, the number of first mounting plates 1253 is equal to the number of second mounting plates 1254, and one second mounting plate 1254 mounts one first mounting plate 1253.

Referring to fig. 17 to 19, unlike the above embodiment, in the composite cross arm 2200 of the present embodiment, the end fitting 2230 further includes a second flange cylinder 2237, which is disposed in a hollow structure in an axial direction, is disposed coaxially with the first flange cylinder 2231 and is connected to the other end of the first flange cylinder 2231 away from the sealing plate 2232, wherein an outer circumferential surface of the second flange cylinder 2237 is smooth.

Specifically, since the outer circumferential surface of the second flange cylinder 2237 is smooth, the second flange cylinder 2237 having a smooth outer circumferential surface can be fixed to the outer periphery of the post insulator 2210 using a crimping process, and since the first flange cylinder 2231 is connected to the second flange cylinder 2237, the first flange cylinder 2231 can be fixed to the outer periphery of the post insulator 2210 also after the second flange cylinder 2237 is fixed to the outer periphery of the post insulator 2210 using a crimping process, i.e., the end fitting 2230 can be fixed to the outer periphery of the post insulator 2210 using a crimping process.

The foregoing embodiment employs a glue process to mount the end fitting 1230 on the post insulator 1210, and compared with a compression bonding process, the glue process has long process time, low molding efficiency and requires a large number of molding tools, and the post insulator 1210 is poor in bending load and torsion load after molding, that is, the present embodiment employs the compression bonding process to mount the end fitting 2230 on the post insulator 2210, which can improve production efficiency, reduce production cost (use of molding tools is reduced), and ensure that the post insulator 2210 bears strong bending load and torsion load.

In the present embodiment, the first flange cylinder 2231 is detachably connected to the second flange cylinder 2237. This arrangement can enable the end fittings 2230 to be separated during transportation, can facilitate transportation, and can be replaced in time when the first flange cylinder 2231 or the second flange cylinder 2237 is damaged, avoiding scrapping the entire end fittings 2230.

Meanwhile, during the transportation, only the second flange cylinder 2237 may be fixed on the post insulator 2210, and then the first flange cylinder 2311 is connected with the second flange cylinder 2237 after reaching the destination, so that the packing cost of the post insulator 2210 during the transportation may be reduced.

Referring to fig. 19 and 20, the end fitting 2230 further includes a first flange 2238 and a second flange 2239.

The first flange 2238 is disposed at the other end of the first flange cylinder 2231 away from the sealing plate 2232 and sleeved on the periphery of the first flange cylinder 2231, and the second flange cylinder 2239 is disposed at one end of the second flange cylinder 2237 and sleeved on the periphery of the second flange cylinder 2237, wherein the first flange cylinder 2238 and the second flange cylinder 2239 are detachably connected to realize the detachable connection of the first flange cylinder 2231 and the second flange cylinder 2237, and in particular, the arrangement can indirectly increase the contact area between the first flange cylinder 2231 and the second flange cylinder 2237, thereby increasing the connection strength between the first flange cylinder 2231 and the second flange cylinder 2237.

Referring to fig. 20, first flange 2238 and second flange 2239 are each provided with a mating locking aperture 22381 for connecting first flange 2238 and second flange 2239 together with a locking member (e.g., a bolt) that passes through locking aperture 22381.

In other embodiments, the first flange 2238 and the second flange 2239 may be provided with matching fastening structures, so that the first flange 2238 and the second flange 2239 can be detachably connected by fastening, which is not limited by how the first flange 2238 and the second flange 2239 can be detachably connected.

In other embodiments, the end fitting 2230 may further include a third flange cylinder, a fourth flange cylinder, or even more flange cylinders in addition to the first flange cylinder 2231 and the second flange cylinder 2237, that is, the number of flange cylinders in the end fitting 2230 is more than two, and in this case, a plurality of flange cylinders in the end fitting 2230 are coaxially disposed and sequentially connected, for example, the fourth flange cylinder, the third flange cylinder, the second flange cylinder 2237, and the first flange cylinder 2231 are sequentially connected, or the second flange cylinder 2237, the fourth flange cylinder, the third flange cylinder, and the first flange cylinder 2231 are sequentially connected, and in addition to the second flange cylinder 2237, the third flange cylinder, the fourth flange cylinder, or the other flange cylinder may be a flange cylinder with a smooth outer peripheral surface, or the diagonal insulator 2220 may be connected to the third flange cylinder, the fourth flange cylinder, or the other flange cylinder besides being connected to the first flange cylinder 2231.

Meanwhile, when the end fitting 2230 further includes a third flange cylinder and a fourth flange cylinder or even more flange cylinders, the connection manner between two adjacent flange cylinders may be the same as the connection manner between the first flange cylinder 2231 and the second flange cylinder 2237, for example, the two adjacent flange cylinders are detachably connected, and the two adjacent flange cylinders are detachably connected through flanges sleeved on the respective ends, and the two detachably connected flange plates are respectively provided with a matching locking hole 22381 so as to connect the two adjacent flange plates together by using a locking member passing through the locking hole 22381.

Referring to fig. 21 and 22, fig. 21 is a schematic structural view of another embodiment of a power transmission tower according to the present application, and fig. 22 is a schematic structural view of a portion of fig. 21, unlike the above embodiment, a tower body 3100 in this embodiment includes a tower shaft 3110, and both ends of a post insulator 3210 and a cable-stayed insulator 3220 in a composite cross arm 3200 are connected to the tower shaft 3110.

The tower 3110 may be a steel pipe, or may be a solid or hollow rod made of other materials such as composite materials, iron, and alloys, but is not limited thereto.

Meanwhile, in order to mount the composite cross arm 3200 to the tower shaft 3110, referring to fig. 23, the power transmission tower 3000 further includes a cross arm link 3300. The cross arm connecting fitting 3300 connects the end of the post insulator 3210, which is not connected to the diagonal insulator 3220, and the end of the diagonal insulator 3220, which is not connected to the post insulator 3210, to the tower 3110, thereby realizing the installation of the composite cross arm 3200 to the tower 3100, specifically to the tower 3110.

The cross arm connecting fitting 3300 includes a connecting rod 3310, a tower body flange 3320, and a tower body flange 3330.

In the present embodiment, the number of the cable-stayed insulators 3220 is three, wherein two cable-stayed insulators 3220 having axes in the same plane as the axes of the post insulators 3210 are defined as first cable-stayed insulators 3221, the remaining cable-stayed insulators 3220 are defined as second cable-stayed insulators 3222, and the distances from the second cable-stayed insulators 3222 to the two first cable-stayed insulators 3221 are equal.

And, for convenience of explanation, the diagonal tie 3240 connecting the tower bar 3110 and the first diagonal insulator 3221 is defined as a first diagonal tie 3241, and the diagonal tie 3240 connecting the tower bar 3110 and the second diagonal insulator 3222 is defined as a second diagonal tie 3242.

The number of the connecting rods 3310 is two, the two connecting rods 3310 respectively connect the two first cable-stayed insulators 3221 with the tower 3110, namely, a first cable-stayed connecting fitting 3241 connected with the end part of the first cable-stayed insulator 3221 is connected with the connecting rods 3310, one end of a tower body flange cylinder 3320 is connected with the tower 3110, and one end, far away from the tower 3110, of the tower body flange cylinder 3320 is covered by a tower body flange 3330 and is connected with a post insulator 3210.

In an application scenario, as shown in fig. 22 and 23, both of the connection bars 3310 are disposed perpendicular to the tower 3110, and the height of the two connection bars 3310 is the same with respect to the tower 3110.

Of course, in other application scenarios, the two connecting rods 3310 may not be disposed perpendicular to the tower 3110, or the heights of the two connecting rods 3310 relative to the tower 3110 may be different, and the specific arrangement manner may be determined by the structure of the composite cross arm 3200, which is not limited herein.

In another application scenario, both the connecting rods 3310 and the tower flange cylinder 3320 are fixed to the tower 3110 by welding, but may be fixed by other forms, which is not limited thereto.

Meanwhile, unlike the above-described embodiment, as shown in fig. 22 and 23, the tower body flange 3330 in the cross arm link fitting 3300 is butted with the end flange 3252 in the post link fitting 3250 to achieve the installation of the post insulator 3210.

With continued reference to fig. 22 and 23, cross arm link fitting 3300 further includes a stiffener ring 3340 and stiffener ribs 3350.

The reinforcing ring 3340 is sleeved on the periphery of the tower 3110, two ends of the reinforcing rib 3350 are respectively connected with the reinforcing ring 3340 and the tower body flange cylinder 3320, and the side wall of the reinforcing rib 3350 is attached to the tower 3110, so that the contact area between the tower body flange cylinder 3320 and the tower 3110 is further indirectly increased, and the connection strength between the tower body flange cylinder 3320 and the tower 3110 is ensured.

When the number of the reinforcing rings 3340 is two, as shown in fig. 23, the two reinforcing rings 3340 are disposed on two sides of the tower flange cylinder 3320 opposite to each other, and for the tower flange cylinder 3320, they are connected to the two reinforcing rings 3340 through two reinforcing ribs 3350.

With continued reference to fig. 22 and 23, the cross arm connecting fitting 3300 further includes a reinforcing plate 3360, two ends of the reinforcing plate 3360 are respectively connected with the connecting rod 3310 and the tower body flange cylinder 3320, and a side wall of the reinforcing plate 3360 is attached to the tower 3110, so that the contact area of the connecting rod 3310, the tower body flange cylinder 3320 and the tower 3110 is indirectly increased, and the connection strength of the connecting rod 3310, the tower body flange cylinder 3320 and the tower 3110 is ensured.

Meanwhile, in order to further increase the connection strength between the connection rod 3310 and the tower body flange cylinder 3320, the connection rod 3310 may be connected to the reinforcement ring 3340 through the reinforcement rib 3350, and the reinforcement rib 3350 for connecting the reinforcement ring 3340 to the connection rod 3310 and the reinforcement rib 3350 for connecting the reinforcement ring 3340 to the tower body flange cylinder 3320 may be the same.

It should be noted that the reinforcing rings 3360 and 3340 may exist at the same time, only one of them may exist, or none of them may exist (see fig. 21 and 24 for specific details).

Meanwhile, the reinforcing ring 3340, the reinforcing rib 3350 and the reinforcing plate 3360 can be fixedly connected with the two connecting rods 3310 and the tower body flange cylinder 3320 in a welding mode or the like to form the cross arm connecting fitting 3300, and of course, the cross arm connecting fitting 3300 can also be integrally formed and arranged, so that the method is not limited.

With continued reference to fig. 22, the cross arm connecting fitting 3300 further includes a connecting lug 3370, where the connecting lug 3370 is fixed on the tower 3110, and the fixing manner of the connecting lug 3370 and the tower 3110 is identical to the fixing manner of the connecting rod 3310, the tower body flange cylinder 3320 and the tower 3110, which are not described herein.

The cable-stayed connecting fitting 3240 (the second cable-stayed connecting fitting 3242) connected with the end portion of the second cable-stayed insulator 3222 is connected with the connecting lug 3370, specifically, the second cable-stayed connecting fitting 3242 is connected with the connecting lug 3370 through a U-shaped ring, the connecting lug 3370 is a thin plate, the connecting lug 3370 is provided with a connecting hole, and after the U-shaped ring is in locking connection with the second cable-stayed connecting fitting 3242 through a fastener, the connecting hole on the connecting lug 3370 is also locked and fixed through penetrating the fastener. In other embodiments, the second diagonal connector 3242 may also be connected to the tower 3110 via a connecting rod 3310, which is not limited herein.

Referring to fig. 25, the present application further protects an end fitting 4000 having the same structure as the end fitting in the foregoing embodiment, and in particular, reference may be made to the foregoing embodiment, which is not repeated herein.

Referring to fig. 26, the present application further protects a composite cross arm, and the composite cross arm 5000 has the same structure as the composite cross arm in the previous embodiment, and specifically, the previous embodiment may be referred to, and will not be described herein.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims (10)

1. A post insulator, comprising:

An insulator;

umbrella skirt, cover in the periphery of the said insulator;

the pillar link fitting, the one end of insulator is connected with pillar link fitting is in order will pillar insulator installs on the body of the tower, pillar link fitting includes:

The end flange cylinder is arranged in a hollow structure along the axial direction of the end flange cylinder and sleeved at one end of the insulator;

An end flange plate for sealing the end of the end flange barrel far away from the insulator;

The end part of the first mounting plate is abutted with the disc surface of the end flange far away from the end flange cylinder, and the first mounting plate is used for being connected with the tower body so as to realize the mounting of the post insulator;

the post insulator further includes an end fitting including:

The first flange cylinder is arranged in a hollow structure along the axial direction of the first flange cylinder and sleeved at the other end of the insulator, a plurality of glue grooves are formed in the inner wall of the first flange cylinder at intervals along the axial direction of the first flange cylinder, the glue grooves are filled with adhesives so as to fixedly connect the first flange cylinder and the insulator, the width of each glue groove is not more than 12mm, and the ratio range of the length of the contact part of the inner wall of the first flange cylinder and the insulator to the outer diameter of the insulator is 0.8-1.2;

the sealing plate is used for sealing one end of the first flange cylinder, the sealing plate faces the disc surface of the insulator and is provided with a first sealing groove opposite to the end surface of the insulator, a first sealing piece is arranged in the first sealing groove, the inner wall of the first flange cylinder is provided with a second sealing groove adjacent to the sealing plate, the second sealing groove and the glue binding grooves are sequentially arranged at intervals along the direction away from the sealing plate, and a second sealing piece is arranged in the second sealing groove.

2. The post insulator of claim 1, wherein the first mounting plate has a through hole for a fastener to pass through to mount the first mounting plate to the tower.

3. The post insulator of claim 1, wherein the first mounting plates are straight plates, the number of the first mounting plates is two, the two first mounting plates are arranged in parallel with each other, and the two first mounting plates are arranged on the end flange plate vertically.

4. The post insulator of claim 1, wherein the post attachment fitting further comprises:

the second mounting plate is detachably connected with the first mounting plate and is used for connecting the first mounting plate with the tower body.

5. The post insulator of claim 4, wherein the first mounting plate is a straight plate and the second mounting plate is a bent plate, one end of the second mounting plate being attached to the first mounting plate and the other end being attached to a cross beam on the tower.

6. The post insulator according to claim 1, wherein the insulator is a solid insulating core or the insulator is a hollow insulating tube, insulating gas is sealed in the hollow insulating tube, and the absolute pressure value of the insulating gas ranges from 0.1 mpa to 0.15mpa.

7. The post insulator of claim 1, wherein the umbrella skirt comprises a plurality of spaced apart and identical umbrella bodies, the umbrella bodies being radially symmetrical with respect to the insulator.

8. A composite cross arm, which is characterized by comprising the post insulator and a diagonal insulator according to any one of claims 1-7, wherein one end of the diagonal insulator is fixedly connected with the first flange cylinder, so that the diagonal insulator is connected with one end of the post insulator, which is not connected with the tower body, and the end fitting further comprises a second flange cylinder coaxially arranged with the first flange cylinder, and the outer circumferential surface of the second flange cylinder is smooth.

9. The composite cross arm of claim 8, wherein the first flange cylinder is removably connected to the second flange cylinder.

10. The composite cross arm of claim 9, wherein a first flange is sleeved on the periphery of the end portion of the first flange barrel away from the sealing plate, a second flange is sleeved on the periphery of the end portion of the second flange barrel, and the first flange is detachably connected with the second flange so as to realize the detachable connection of the first flange barrel with the second flange barrel.