Post insulators and composite crossarms

Abstract

The present application discloses a post insulator and a composite cross arm, the post insulator comprises: an insulator; an umbrella skirt, which is coated on the periphery of the insulator; a post connection hardware, one end of the insulator is connected with the post connection hardware to install the post insulator on the tower body, the post connection hardware comprises: an end flange tube, which is axially arranged as a hollow structure and is sleeved on one end of the insulator; an end flange plate, which covers the end of the end flange tube away from the insulator; a first mounting plate, the end of the first mounting plate abuts against the disk surface of the end flange plate away from the end flange tube, and the first mounting plate is used to connect with the tower body, thereby realizing the installation of the post insulator. The arrangement of the present application can improve the strength of the post insulator and extend the service life of the post insulator.

Description

Technical Field

[0001] The present application relates to the field of power transmission technology, and in particular to a post insulator and a composite crossarm. Background Art

[0002] Composite materials are one of the ideal materials for building transmission tower structures due to their advantages such as light weight, high strength, corrosion resistance, easy processing, designability and good insulation performance. Towers made of composite materials have the advantages of light weight, small tower head size, light structure, easy processing and molding, low transportation and assembly costs, corrosion resistance, high and low temperature resistance, high strength, low possibility of theft and low line maintenance costs.

[0003] The inventor of the present application has found that the performance of the current pole towers made of composite materials needs to be improved. For example, the composite cross arm is generally formed by a combination of a post insulator and a diagonal insulator, and although it includes a single-column structure, a single-column single-pull structure, a double-column single-pull structure and other forms, the stability and service life of these forms of composite cross arms still need to be improved. Summary of the invention

[0004] The purpose of the present application is to provide a post insulator and a composite crossarm, which can improve the strength of the post insulator and extend the service life of the post insulator.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a post insulator, characterized in that it includes: an insulator; an umbrella skirt, which is covered on the periphery of the insulator; a post connecting hardware, one end of the insulator is connected to the post connecting hardware to install the post insulator on the tower body, and the post connecting hardware includes: an end flange tube, which is axially arranged as a hollow structure and is sleeved on one end of the insulator; an end flange plate, which covers the end of the end flange tube away from the insulator; a first mounting plate, the end of the first mounting plate is in contact with the disk surface of the end flange plate away from the end flange tube, and the first mounting plate is used to connect to the tower body, thereby realizing the installation of the post insulator.

[0006] The above-mentioned end flange plate is provided to cover the end of the end flange tube away from the end of the post insulator, which can prevent the post insulator from being corroded by external water vapor and the like, and prolong the service life of the post insulator.

[0007] The first mounting plate is provided with a through hole for fasteners to pass through so as to mount the first mounting plate on the tower body.

[0008] The above-mentioned through holes are arranged on the first mounting plate, so that the first mounting plate can be easily mounted on the tower body by using fasteners.

[0009] Wherein, the first mounting plate is a straight plate, the number of the first mounting plates is two, the two first mounting plates are arranged parallel to each other, and the two first mounting plates are both vertically arranged on the end flange.

[0010] The number of the first mounting plates provided is two, which can enhance the connection strength between the support insulator and the tower body.

[0011] Wherein, the support connecting fittings further include: a second mounting plate, which is detachably connected to the first mounting plate and is used to connect the first mounting plate and the tower body.

[0012] The second mounting plate is detachably connected to the first mounting plate, so that the first mounting plate can be directly connected to the tower body according to different needs, or the first mounting plate can be connected to the tower body through the second mounting plate, thereby making the structure of the support insulator flexible and changeable.

[0013] The first mounting plate is a straight plate, the second mounting plate is a bent plate, one end of the second mounting plate is in contact with the first mounting plate, and the other end of the second mounting plate is in contact with the crossbeam on the tower body.

[0014] The second mounting plate is arranged as a bent plate, and one end of the second mounting plate is fitted with the first mounting plate, and the other end is fitted with the crossbeam on the tower body, which can ensure the connection strength between the tower body and the support insulator.

[0015] 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 to 0.15 MPa.

[0016] The insulator is set as a hollow insulating tube, and the insulating gas with an absolute pressure value ranging from 0.1 to 0.15 MPa is sealed inside the insulator, which can avoid daily maintenance and monitoring of the post insulator.

[0017] The umbrella skirt includes a plurality of identical umbrella bodies which are arranged at intervals, and the umbrella bodies are radially symmetrical relative to the insulator.

[0018] The radial symmetry of the umbrella body relative to the insulator is beneficial to the self-cleaning of the umbrella skirt and makes the post insulator resistant to dirt, rain flashover and ice flashover.

[0019] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a composite crossarm, including the above-mentioned post insulator and the oblique-pull insulator, one end of the oblique-pull insulator is connected to the end of the insulator that is not connected to the tower body through an end hardware, the end hardware includes at least two flange tubes that are coaxially arranged and connected in sequence, at least two of the flange tubes are both sleeved on the periphery of the insulator, and one of the flange tubes is connected to the oblique-pull insulator to achieve the connection between the post insulator and the oblique-pull insulator, and the outer circumferential surface of one of the flange tubes is smooth.

[0020] The outer circumferential surface of one of the flange tubes in the above-mentioned setting is smooth, so that the end hardware can be installed on the post insulator by using a crimping process. Compared with the prior art that uses a gluing process to install the end hardware on the post insulator, the production efficiency of the composite crossarm can be improved and the production cost of the composite crossarm can be reduced. At the same time, compared with the gluing process, the mechanical properties of the post insulator produced by the crimping process are better.

[0021] Wherein, two adjacent flange cylinders are detachably connected.

[0022] The above-mentioned setting of two adjacent flange tubes being detachably connected can simultaneously realize the use of a crimping process for the end fittings and provide favorable conditions for connecting the end fittings to the oblique-stayed insulators, while also allowing the end fittings to be separated during transportation, thereby facilitating transportation.

[0023] Wherein, flange plates are sleeved on the peripheries of the ends of the two detachably connected flange cylinders, wherein two adjacent flange plates are detachably connected to realize detachable connection of two adjacent flange cylinders.

[0024] The above-mentioned arrangement of detachable connection between two adjacent flange plates to realize detachable connection between two adjacent flange cylinders can indirectly increase the contact area between the two adjacent flange cylinders, thereby ensuring the connection strength between the two adjacent flange cylinders.

[0025] The beneficial effect of the present application is that the end flange cover of the end flange tube in the pillar connection fitting is arranged away from the end of the pillar insulator, which can prevent the pillar insulator from being corroded by external water vapor and the like and extend the service life of the pillar insulator.

[0026] At the same time, the second mounting plate is detachably connected to the first mounting plate, so that the first mounting plate can be directly connected to the tower body according to different needs, or the first mounting plate can be connected to the tower body through the second mounting plate, thereby making the structure of the support insulator flexible and changeable.

[0027] At the same time, the second mounting plate is set as a bent plate, and one end of the second mounting plate is fitted with the first mounting plate, and the other end is fitted with the crossbeam on the tower body, which can ensure the connection strength between the tower body and the support insulator.

[0028] In addition, a flange tube in the end fitting is provided with a smooth outer circumferential surface, so that the end fitting can be installed on the post insulator by a crimping process. Compared with the prior art of installing the end fitting on the post insulator by a gluing process, the production efficiency of the composite cross-arm can be improved and the production cost of the composite cross-arm can be reduced. At the same time, compared with the gluing process, the mechanical properties of the post insulator produced by the crimping process are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0030] Figure 1 It is a structural schematic diagram of an implementation method of a transmission tower of the present application;

[0031] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle composite cross arm;

[0032] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0033] Figure 4 yes Figure 2 Schematic diagram of the structure when the middle post insulator is connected to the end fittings;

[0034] Figure 5 yes Figure 4 Schematic cross-section of the structure along the CC section;

[0035] Figure 6 yes Figure 3 Schematic diagram of the structure of the middle end fitting;

[0036] Figure 7 yes Figure 3 Schematic diagram of the structure of the middle end fitting when it is at another viewing angle;

[0037] Figure 8 This is a structural diagram of the connection between the hanging board and the wire clamp in an application scenario;

[0038] Fig. 9 It is a structural schematic diagram of the joint plate;

[0039] Fig.10 yes Figure 7 Schematic diagram of the cross section of the end fitting along the DD section;

[0040] Fig.11 yes Fig.10 The enlarged schematic diagram of point E in the middle;

[0041] Fig.12 yes Fig.10 An enlarged schematic diagram of point F in an application scenario;

[0042] Fig.13 yes Fig.10 An enlarged schematic diagram of point F in another application scenario;

[0043] Fig.14 yes Figure 2 The enlarged schematic diagram of point B in the middle;

[0044] Fig.15 yes Figure 1 The enlarged schematic diagram of the H in the middle;

[0045] Fig.16 yes Figure 2 The enlarged schematic diagram of point I in the middle;

[0046] Fig.17 is a schematic diagram of the structure of a composite cross arm in another embodiment;

[0047] Fig.18 yes Fig.17 The enlarged schematic diagram of G in the middle;

[0048] Fig.19 yes Fig.18 Schematic diagram of the structure of the middle end fitting;

[0049] Fig. 20 yes Fig.19 Schematic diagram of the explosion structure of the end fittings;

[0050] Fig.21 It is a structural schematic diagram of another embodiment of the transmission tower of the present application;

[0051] Fig. 22 yes Fig.21 Schematic diagram of some structures in ;

[0052] Fig.23 yes Fig. 22 The enlarged schematic diagram of J in the middle;

[0053] Fig.24 yes Fig.21 Schematic diagram of some structures in ;

[0054] Fig.25 This is a structural schematic diagram of an implementation method of the end fitting of the present application;

[0055] Fig.26 It is a structural schematic diagram of an implementation method of a composite cross arm of the present application. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] See also Figures 1 to 3 The 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 diagonal insulator 1220 .

[0058] The tower body 1100 may be a transmission tower structure of common structures such as a lattice iron tower, a pole body or a composite pole tower. In the present embodiment, the tower body 1100 is a lattice iron tower, wherein the accompanying drawings only show a part of its structure.

[0059] One end of the post insulator 1210 and one end of the oblique-pull insulator 1220 are both connected to the tower body 1100, and the other ends are connected through the end fitting 1230. In this embodiment, the number of the post insulator 1210 is one, and the number of the oblique-pull insulators 1220 is at least two, such as two, three, four or even more. At least two oblique-pull insulators 1220 are arranged at intervals around the post insulator 1210, and the axes of the two oblique-pull insulators 1220 are in the same plane as the axis of the post insulator 1210.

[0060] Specifically, at least two inclined insulators 1220 are connected to the support insulator 1210 through the end fittings 1230. At the same time, the axes of the two inclined insulators 1220 and the axis of the support insulator 1210 are in the same plane, so that a stable triangular structure is formed between the composite crossarm 1200 and the tower body 1100, which can greatly improve the stability performance of the composite crossarm 1200.

[0061] Continue reading Figure 2 In this embodiment, the number of the oblique insulators 1220 is three, wherein two oblique insulators 1220 whose axes are in the same plane as the axis of the post insulator 1210 are defined as first oblique insulators 1221, and the remaining oblique insulators 1220 are defined as second oblique insulators 1222, wherein the distances from the second oblique insulators 1222 to the two first oblique insulators 1221 are equal, and the angle range between the two first oblique insulators 1221 is 45° to 90°, for example, 45°, 60° or 90°, and the angle range between the second oblique insulator 1222 and the post insulator 1210 is 25° to 45°, for example, 25°, 30°, 35° or 45°.

[0062] Specifically, considering that the larger the angle between the two first oblique insulators 1221, the greater the mechanical strength that the composite cross arm 1200 can withstand, but the length of the composite cross arm 1200 and the width of the tower body 1100 also need to be increased accordingly, the angle range of the two first oblique insulators 1221 is controlled within 45° to 90°, which not only meets the force requirements of the composite cross arm 1200, but also optimizes the length of the composite cross arm 1200 and the width of the tower body 1100. Similarly, controlling the angle range between the second oblique insulator 1222 and the post insulator 1210 within 20° to 45° can also achieve the same purpose.

[0063] Specifically, three groups of composite cross arms (not shown) are sequentially arranged on the tower body 1100 from top to bottom, and the lengths of the three groups of composite cross arms are decreasing or increasing or in other forms, that is, the length of the post insulator is decreasing or increasing or in other forms from bottom to top, and the greater the length of the post insulator 1210, the smaller the angle between the two first oblique insulators 1221. Assuming that the angle between the two first oblique insulators 1221 is α, the length of the post insulator 1210 is L, the width of the tower body 1100 perpendicular to the post insulator in the horizontal direction is D, the width of the tower body 1100 parallel to the post insulator 1210 in the horizontal direction is n, and the distance between the connection point of the two first oblique insulators 1221 extending out of the tower body 1100 and the tower body 1100 is m, it can be obtained from the trigonometric formula:

[0064]

[0065] In an application scenario, taking a 220kV transmission tower 1000 as an example, the range of L is 2000mm~4000mm, the range of D is 2000mm~3000mm, m is generally set to 1000mm, and n is generally set to 1000mm. It can be calculated that the minimum value of α is 47.9° and the maximum value of α is 90°. Since the sizes of m and n can be adjusted, the angle range of the two first oblique insulators 1221 can be controlled within 45°~90°.

[0066] Similarly, assuming that the angle between the second oblique insulator 1222 and the support insulator 1210 is β, and assuming that the distance between the connection point of the support insulator 1210 on the tower body 1100 and the connection point of the second oblique insulator 1222 on the tower body 1100 is H, the trigonometric formula can be obtained:

[0067]

[0068] Taking the 220kV transmission tower 1000 as an example, H is generally set to 2000mm, from which it can be calculated that the minimum value of β is 26.6° and the maximum value of β is 45°. Since the size of H can be adjusted again, the angle range between the support insulator 1210 and the adjacent inclined insulator 1220 can be controlled within 25° to 45°.

[0069] At the same time, setting the angle range between the two first oblique-pull insulators 1221 to 45° to 90° can provide favorable conditions for setting a first grading ring (not shown) and an end fitting 1230 on the high-voltage end (the end away from the tower body 1100) of the post insulator 1210, and setting a second grading ring 12201 on the high-voltage end (the end away from the tower body 1100) of the two first oblique-pull insulators 1221. Specifically, it can ensure that there is no interference between the first grading ring on the post insulator 1210 and the second grading ring 12201 on the first oblique-pull insulator 1221, there is no interference between the second grading rings 12201 on the two first oblique-pull insulators 1221, and there is no interference between the first grading ring on the post insulator 1210, the second grading ring 12201 on the first oblique-pull insulator 1221 and the end fitting 1230.

[0070] And setting the angle range between the second oblique-pull insulator 1222 and the post insulator 1210 to 25° to 45° can provide favorable conditions for setting the first equalizing ring on the high-voltage end of the post insulator 1210 and setting the third equalizing ring 12202 on the high-voltage end of the second oblique-pull insulator 1222 (the end away from the tower body 1100). Specifically, it can ensure that the first equalizing ring set on the post insulator 1210 and the third equalizing ring 12202 set on the second oblique-pull insulator 1222 do not interfere with each other during misaligned installation.

[0071] Continue reading Figure 1 and Figure 2 In this embodiment, the installation heights of the post insulator 1210 and the two first oblique insulators 1221 are the same, and the second oblique insulator 1222 is located above the post insulator 1210. It should be noted that in other embodiments, when there are more than one second oblique insulators 1222, the second oblique insulators 1222 can be arranged above and below the post insulator 1210, so that the tension of the transmission line in all directions can be balanced.

[0072] The support insulator 1210 may be arranged horizontally ( Figure 1 The horizontal setting is used for illustration in the figure), but the setting can also be tilted.

[0073] At the same time, in order to ensure that the composite cross arm 1200 is subjected to uniform force, the angles between the two first oblique insulators 1221 and the support insulator 1210 are equal, that is, at this time, the axis of the second oblique insulator 1222 and the axis of the support insulator 1210 are in the same vertical plane.

[0074] Of course, in other embodiments, the angles between the two first oblique insulators 1221 and the post insulator 1210 may also be unequal, which is not limited here.

[0075] See also Figure 4 and Figure 5 In this embodiment, the post insulator 1210 includes an insulator 1211 and an umbrella skirt 1212 wrapped around the outer periphery of the insulator 1211 .

[0076] Specifically, the insulator 1211 can be a solid insulating core or a hollow insulating tube. When the insulator 1211 is a solid insulating core, it can be a solid core rod formed by glass fiber or aramid fiber impregnated with epoxy resin and wound or pultruded or pultruded and wound. When the insulator 1211 is a hollow insulating tube, it can be a hollow pultruded tube formed by glass fiber or aramid fiber impregnated with epoxy resin and pultruded and wound. It can also be a glass fiber reinforced plastic tube formed by glass fiber impregnated with epoxy resin and wound and cured or pultruded. It can also be an aramid fiber tube formed by aramid fiber impregnated with epoxy resin and wound and cured. There is no limitation here.

[0077] The insulator 1211 may be cylindrical (the figure shows a cylindrical shape), conical or other shapes (such as drum shape), without limitation. When the insulator 1211 is conical, its conical end (the end with a smaller diameter) is connected to the end fitting 1230, and the other end is connected to the tower body 1100.

[0078] In one application scenario, when the insulator 1211 is a hollow insulating tube, insulating gas is sealed in the insulator 1211, and the absolute pressure value of the insulating gas ranges from 0.1 to 0.15 MPa, for example, 0.1 MPa, 0.12 MPa or 0.15 MPa.

[0079] Specifically, the gas sealed in the hollow insulating tube can be high-purity nitrogen, air, sulfur hexafluoride or other gases that have been dried, and there is no limitation here.

[0080] At the same time, setting the absolute pressure range of the insulating gas to 0.1-0.15Mpa can prevent the insulating gas from leaking from the hollow insulating tube, avoiding the daily maintenance and monitoring of the post insulator 1210, and meeting the different pressure usage requirements in different regions and altitudes, thereby ensuring that the internal gas of the hollow insulating tube is in a non-negative pressure state when used in different regions. At the same time, it can also enable the hollow insulating tube to have a larger micro-water control margin, effectively reducing the difficulty of micro-water control.

[0081] In other application scenarios, when the insulator 1211 is a hollow insulating tube, its interior may also be sealed with an inert gas or a solid material such as polyurethane, liquid silicone rubber, etc., which is not limited here.

[0082] Meanwhile, the umbrella skirt 1212 can be made of materials such as high temperature vulcanized silicone, liquid silicone rubber or room temperature vulcanized silicone rubber, and there is no limitation here.

[0083] In one application scenario, the umbrella skirt 1212 includes a plurality of identical umbrella bodies arranged at intervals, that is, all the umbrella bodies are identical, and the umbrella bodies are radially symmetrical relative to the insulator 1211, that is, the two surfaces of the umbrella body arranged opposite to each other are inclined in opposite directions and at the same angle. Specifically, the umbrella body is arranged to be radially symmetrical relative to the insulator 1211. On the one hand, compared with the two surfaces of the umbrella body arranged opposite to each other in the prior art that are inclined in the same direction, rainwater can flow down along the umbrella skirt 1212 (if the two surfaces of the umbrella body arranged opposite to each other are inclined in the same direction, rainwater is easily accumulated in the angle between the support insulator 1210 and the umbrella body), so that no water film is formed on the surface of the umbrella skirt 1212, and the umbrella skirt 1212 is self-cleaning. On the other hand, the two sides of the umbrella body arranged opposite to each other can have the same mechanical properties, so that the support insulator 1210 has the characteristics of being resistant to dirt, rain flash, ice flash, and more economical.

[0084] In one application scenario, in order to avoid turbulence and dirt accumulation between two adjacent umbrella bodies and cause bridging, the spacing between two adjacent umbrella bodies is greater than 40mm and does not exceed 60mm, for example, 45mm, 50mm or 60mm. Of course, the distance between two adjacent umbrella bodies should be minimized, so that the distribution density of the umbrella bodies can be increased, making it inconvenient for birds to stand on the sheath, thereby preventing bird damage accidents. At the same time, under the requirement of ensuring the minimum creepage distance, the height of the umbrella body protruding from the insulator 1211 is set to be no more than 80mm, generally set to 50mm~80mm, for example 50mm, 60mm or 70mm, etc.

[0085] It should be noted that, in other embodiments, the umbrella skirt 1212 can also be other structures, for example, two adjacent umbrella bodies are of different sizes, or two surfaces of the umbrella body arranged opposite to each other are inclined in the same direction. In short, the present application does not limit the specific structure of the umbrella skirt 1212.

[0086] Combination Figure 3 , Figure 6 and Figure 7 In this embodiment, the end fitting 1230 includes a first flange tube 1231 , a sealing plate 1232 and a wire hanging plate 1233 .

[0087] The first flange tube 1231 is arranged as a hollow structure along the axial direction, and is used to be sleeved on the end of the support insulator 1210, specifically used to be sleeved on the end of the insulator 1211 in the support insulator 1210; the sealing plate 1232 covers one end of the first flange tube 1231; the line hanging plate 1233 is arranged on the side of the sealing plate 1232 away from the first flange tube 1231 and is connected to the sealing plate 1232, and is used for hanging the transmission line.

[0088] Specifically, when the hanging plate 1233 used for hanging transmission lines is damaged and is replaced, since the sealing plate 1232 covers one end of the first flange tube 1231, it can ensure that the support insulator 1210 inside the first flange tube 1231 is not corroded by external water vapor, etc., thereby ensuring the service life of the support insulator 1210.

[0089] Continue reading Figure 6 and Figure 7 One end of the wire hanging plate 1233 abuts against the plate surface of the sealing plate 1232 away from the first flange cylinder 1231 , and a reinforcing member 1234 is connected between the side of the wire hanging plate 1233 and the sealing plate 1232 .

[0090] Specifically, the reinforcement member 1234 is provided to strengthen the connection between the wire hanging plate 1233 and the sealing plate 1232, thereby preventing the connection between the wire hanging plate 1233 and the sealing plate 1232 from being broken due to insufficient connection strength.

[0091] In an application scenario, such as Figure 6 As shown, the reinforcing member 1234 is a plate, and the sealing plate 1232, the wire hanging plate 1233 and the reinforcing member 1234 are vertically arranged in pairs.

[0092] In order to prevent the end fitting 1230 from being corroded by water vapor, etc., the surface of the end fitting 1230 is hot-dip galvanized. At the same time, the internal material of the end fitting 1230 can be cast aluminum, cast iron or alloy steel, etc., which is not limited here.

[0093] At the same time, the various parts of the end fitting 1230 can be connected together by welding or other methods.

[0094] Continue reading Figure 6The hanging board 1233 is provided with a first hanging part 12331 for hanging the transmission line. Specifically, the first hanging part 12331 is used to install a wire clamp connected to the transmission line, so as to hang the transmission line. The number of the first hanging parts 12331 can be one, two, four or even more, which is not limited here. When the number of the first hanging parts 12331 is multiple, the multiple first hanging parts 12331 can respectively install multiple wire clamps connected to the same transmission line, so that when one of the wire clamps is damaged, it can still ensure the safe hanging of the transmission line.

[0095] In an application scenario, such as Figure 6 As shown, the first wire hanging portion 12331 is a wire hanging through hole, and the side of the wire hanging plate 1233 not provided with the first wire hanging portion 12331 is connected to the reinforcing member 1234. Specifically, this arrangement can ensure that the reinforcing member 1234 can not affect the installation of the wire clip on the wire hanging plate 1233.

[0096] At the same time, in this application scenario, the number of the first hanging wire part 12331 is one, and the hanging wire plate 1233 is also provided with a construction hole 12332 for construction hoisting. Of course, in other application scenarios, the number of the first hanging wire part 12331 can be more than one.

[0097] In an application scenario, such as Figure 8 As shown, when the wire hanging board 1233 is used to hang a single wire, the wire hanging board 1233 is connected to the U-shaped hanging ring 123301. Specifically, the two ends of the U-shaped hanging ring 123301 are connected to the wire hanging board 1233, and the U-shaped hanging ring 123301 is connected to the wire clamp 123302 for hanging the wire.

[0098] When the wire hanging plate 1233 is used to hang two wires, the wire hanging plate 1233 is also connected to the U-shaped hanging ring 123301, but unlike a single wire, the U-shaped hanging ring 123301 is also connected to the middle connecting plate, and then the middle connecting plate is connected to two wire clamps 123302 respectively used to hang the wires. In an application scenario, the cross section of the middle connecting plate is roughly an isosceles triangle, the two wire clamps 123302 are respectively connected to the two bottom corners of the middle connecting plate, and the U-shaped hanging ring 123301 is connected to the top corner of the middle connecting plate.

[0099] In one application scenario, see Fig. 9The composite cross arm 1200 further includes a connecting plate 1235, which is used to connect with the wire hanging plate 1233, and the connecting plate 1235 is provided with a second wire hanging portion 12351 for hanging the transmission line, wherein the number of the second wire hanging portions 12351 is greater than the number of the first wire hanging portions 12331. Specifically, due to the area limitation of the wire hanging plate 1233, the number of the first wire hanging portions 12331 allowed to be set is limited, which cannot meet the wire hanging requirements in certain application scenarios, and the setting of the connecting plate 1235 can play a role in expanding the number of the first wire hanging portions 12331.

[0100] In one application scenario, in order to adapt to the needs of different application scenarios, the connecting plate 1235 is connected to the hanging plate 1233 through a length-adjustable connecting hardware (not shown), so that the relative distance between the connecting plate 1235 and the hanging plate 1233 can be adjusted according to needs in different application scenarios.

[0101] In one application scenario, the second wire hanging portion 12351 has the same structure as the first wire hanging portion 12331, for example, both are wire hanging through holes. Of course, the structures of the second wire hanging portion 12351 and the first wire hanging portion 12331 may also be different. For example, the first wire hanging portion 12331 is a wire hanging through hole, and the second wire hanging portion 12351 is a wire hanging slot. In short, this application does not limit the specific structures of the first wire hanging portion 12331 and the second wire hanging portion 12351.

[0102] Combination Figure 3 , Figure 6 and Figure 7 In this embodiment, the end fitting 1230 further includes a connecting plate 1236 , which is disposed on the periphery of the first flange cylinder 1231 and connected to the first flange cylinder 1231 , and is used to connect the oblique-pull insulator 1220 .

[0103] Specifically, the connecting plate 1236 can be disposed on the periphery of the first flange cylinder 1231 by means such as welding.

[0104] Among them, the connecting plate 1236 arranged on the periphery of the first flange tube 1231 is used to connect the oblique insulator 1220, which can avoid destroying the first flange tube 1231 (for example, opening a hole on the first flange tube 1231) in order to directly use the first flange tube 1231 to connect the oblique insulator 1220, thereby ensuring the strength of the first flange tube 1231.

[0105] In this embodiment, the number of the connecting plates 1236 can be one or at least two. When there is one connecting plate 1236, in order to connect all the oblique-pull insulators 1220, the connecting plate 1236 can extend around the first flange cylinder 1231 to form a semi-enclosed structure or a fully-enclosed structure, and when there are at least two connecting plates 1236, different connecting plates 1236 can be connected to different oblique-pull insulators 1220, that is, the number of the connecting plates 1236 can be equal to the number of the oblique-pull insulators 1220, and at least two connecting plates 1236 are arranged at intervals along the circumference of the first flange cylinder 1231 (such as Figure 3 and Figure 6 shown).

[0106] Combination Figure 7 and Fig.10 In this embodiment, the inner wall of the first flange cylinder 1231 is provided with a plurality of glue grooves 12311 spaced apart along the axial direction and a flow groove 12312 connecting the plurality of glue grooves 12311, wherein the glue grooves 12311 and the flow grooves 12312 are filled with adhesive to fix the first flange cylinder 1231 and the insulator 1211.

[0107] Specifically, during the production process, a horizontal gluing process or a vertical gluing process is used to connect the end hardware 1230 and the post insulator 1210 together: during the production process, the adhesive is first injected between the first flange tube 1231 and the insulator 1211 through the glue injection hole, and then after a certain period of high-temperature curing, the end hardware 1230 and the post insulator 1210 can be fixedly connected together.

[0108] The setting of the circulation groove 12312 can make the adhesive injected between the first flange tube 1231 and the insulator 1211 flow between adjacent glue grooves 12311, thereby increasing the injection rate, reducing the risk of bubble retention, and making the combination of the end hardware 1230 and the insulator 1211 more firmly, thereby improving the anti-torsion performance of the composite crossarm 1200 without replacing the adhesive with better bonding performance.

[0109] The number of the circulation grooves 12312 may be one or more (for example, two, four, six or even more), and when the number of the circulation grooves 12312 is more than one, the plurality of circulation grooves 12312 are arranged at intervals along the circumference of the first flange cylinder 1231. One circulation groove 12312 may only connect two adjacent adhesive grooves 12311, or may connect three, four or even all adjacent adhesive grooves 12311, which is not limited here.

[0110] The bottom surface of the circulation groove 12312 is a plane or a curved surface. Specifically, when the radial depth and width of the metal fitting 1230 at the opposite end of the circulation groove 12312 are constant, the circulation groove 12312 with a plane bottom surface is more complicated to process and has a higher processing cost than the circulation groove 12312 with a curved bottom surface, but has a higher torsional strength, because the contact area between the adhesive in the plane groove and the inner wall of the first flange cylinder 1231 is larger, that is, the circulation groove 12312 with a curved bottom surface is easier to process and has a lower processing cost than the circulation groove 12312 with a plane bottom surface, but has a slightly lower torsional strength.

[0111] Among them, Fig.11 As shown, the widths of the plurality of glue grooves 12311 are equal, and the width of the glue groove 12311 is smaller than the width of the interval between two adjacent glue grooves 12311. Specifically, by setting the width of the glue groove 12311 to be smaller than the width of the interval between two adjacent glue grooves 12311, the width of the glue matching groove on the insulator 1211 (not shown in the figure, the glue matching groove on the insulator 1211 has the same specifications as the glue groove 12311 on the first flange cylinder 1231 and is arranged opposite to each other) can also be smaller than the width of the interval between two adjacent glue matching grooves. Compared with the width of the glue matching groove on the insulator 1211 being greater than or equal to the width of the interval between two adjacent glue matching grooves, this setting can ensure the shear resistance of the post insulator 1210.

[0112] Specifically, the axial shear strength of the insulator 1211 itself is relatively low, and when it is damaged, the first damaged part is the part that is sleeved into the first flange cylinder 1231 and is not bonded with adhesive, that is, the part of the insulator 1211 adjacent to the two adhesive matching grooves. When the width of the first flange tube 1231 is constant, if the width of the glue groove 12311 is reduced, the distance between two adjacent glue grooves 12311 will increase, that is, the distance between two adjacent glue matching grooves on the insulator 1211 will increase, and its strength against shear failure will increase, ultimately enhancing the shear resistance of the post insulator 1210 of the same specification. However, if the width of the glue groove 12311 is too small, it will lead to an increase in processing time and processing cost. Therefore, the width of the glue groove 12311 is set not to exceed 12mm, for example, 12mm, 10mm or 8mm, etc., which can not only ensure the strength of the composite crossarm 1200, but also ensure that the processing time and processing cost are within a reasonable range.

[0113] In order to facilitate processing, the bottom surface of the glue groove 12311 is a curved surface.

[0114] Among them, the 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 (i.e., the gluing ratio) ranges from 0.8 to 1.2, for example, 0.8, 1.0 or 1.2. Specifically, as the gluing ratio decreases, the strength of the composite crossarm 1200 will decrease significantly. For example, compared with a gluing ratio of 0.8, when the gluing ratio decreases to 0.75, the strength of the composite crossarm 1200 will decrease by 20%, and compared with a gluing ratio of 1.2, when the gluing ratio increases to 1.4, the strength of the composite crossarm 1200 will increase slightly, but the cost will increase significantly. Therefore, setting the gluing ratio range to 0.8 to 1.2 can make the composite crossarm 1200 have the advantages of low cost and high strength at the same time.

[0115] It should also be noted that in other embodiments, the glue groove 12311 and the circulation groove 12312 can also be other sizes, which are not limited here.

[0116] In one application scenario, combined with Figure 5 , Figure 7 , Fig.10 and Fig.12 The 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, the first sealing member is provided in the first sealing groove 12321 to prevent external water vapor or adhesive from entering the insulator 1211, thereby preventing gas leakage in the insulator 1211, and preventing external water vapor or adhesive from entering the sealing plate 1232, thereby affecting the seal between the insulator 1211 and the end fitting 1230.

[0117] Continue reading Fig.10 and Fig.12 The inner wall of the first flange cylinder 1231 is also provided with a second sealing groove 12313 adjacent to the sealing plate 1232. The second sealing groove 12313 and the plurality of gluing grooves 12311 are sequentially arranged in a direction away from the sealing plate 1232. A second sealing member (not shown) is provided in the second sealing groove 12313. Specifically, the second sealing member has a different function from the first sealing member. The second sealing member is used to prevent the adhesive in the gluing process from entering the first sealing groove 12321 to corrode the first sealing member and cause the first sealing member to fail.

[0118] The width of the first sealing groove 12321 and / or the second sealing groove 12313 remains unchanged in the direction close to the insulator 1211 (eg Fig.12 as shown) or gradually decreases (as shown Fig.13As shown). Specifically, the first sealing groove 12321 whose width remains unchanged in the direction close to the insulator 1211 is easy to process, but the first sealing component therein is prone to sliding or even falling off. At this time, in order to avoid the relative sliding of the first sealing component in the first sealing groove 12321, the first sealing component is fixed in the first sealing groove 12321 by resin or silicone bonding; compared with the first sealing groove 12321 whose width remains unchanged in the direction close to the insulator 1211, the first sealing groove 12321 whose width gradually decreases in the direction close to the insulator 1211 has a more complicated processing process, but it can ensure that the first sealing component will not fall off easily. Among them, the width of the first sealing groove 12321 and / or the second sealing groove 12313 can be linearly reduced in the direction close to the insulator 1211 (such as Fig.13 It can also be reduced in a curve, which is not limited here.

[0119] Combination Figure 2 and Fig.14 In this embodiment, the composite cross arm 1200 further includes a diagonal connection fitting 1240 for connecting the tower body 1100 and the diagonal insulator 1220 .

[0120] In this embodiment, the length of the oblique-stayed connecting fitting 1240 connecting the tower body 1100 and the first oblique-stayed insulator 1221 is adjustable, while the length of the oblique-stayed connecting fitting 1240 connecting the tower body 1100 and the second oblique-stayed insulator 1222 is fixed. For the sake of convenience, the oblique-stayed connecting fitting 1240 connecting the tower body 1100 and the first oblique-stayed insulator 1221 is defined as the first oblique-stayed connecting fitting 1241, and the oblique-stayed connecting fitting 1240 connecting the tower body 1100 and the second oblique-stayed insulator 1222 is defined as the second oblique-stayed connecting fitting 1242.

[0121] The first oblique-stayed connection fitting 1241 includes a first sub-connection fitting 12411 and a second sub-connection fitting 12412 .

[0122] The first sub-connection fitting 12411 is connected to the first oblique-stayed insulator 1221; one end of the second sub-connection fitting 12412 is connected to the first sub-connection fitting 12411 in an adjustable position, and the other end is used to connect the tower body 1100, thereby realizing the connection between the first oblique-stayed insulator 1221 and the tower body 1100. Specifically, the second sub-connection fitting 12412 is provided with one end being adjustablely connected to the first sub-connection fitting 12411, so that the structure of the composite crossarm 1200 can be varied and suitable for different application scenarios.

[0123] In an application scenario, such as Fig.14As shown, the first sub-connection fitting 12411 is provided with a plurality of first mounting portions 124111 arranged in an arc shape, and the second sub-connection fitting 12412 is selectively connected to a first mounting portion 124111. Specifically, the plurality of first mounting portions 124111 are arranged in an arc shape, so that the distance and relative angle between the tower body 1100 and the first inclined insulator 1221 can be adjusted.

[0124] In an application scenario, such as Fig.14 As shown, the first sub-connecting fitting 12411 is a fan-shaped flat foot fitting, and the second sub-connecting fitting 12412 is a slot fitting.

[0125] In other embodiments, the plurality of first mounting portions 124111 may also be arranged in a straight line along the extension direction of the first oblique-pull insulator 1221 , which is not limited here.

[0126] In other embodiments, the second sub-connecting fitting 12412 may be connected to the first oblique-stayed insulator 1221 , and the first sub-connecting fitting 12411 may be connected to the tower body 1100 , which is not limited here.

[0127] At the same time, in other embodiments, the length of the oblique-stayed connecting fitting 1240 connecting the tower body 1100 and the first oblique-stayed insulator 1221 and the length of the oblique-stayed connecting fitting 1240 connecting the tower body 1100 and the second oblique-stayed insulator 1222 are both adjustable or non-adjustable. In other words, the tower body 1100 and the first oblique-stayed insulator 1221 can be connected by the first oblique-stayed connecting fitting 1241 or the second oblique-stayed connecting fitting 1242; similarly, the tower body 1100 and the second oblique-stayed insulator 1222 can be connected by the first oblique-stayed connecting fitting 1241 or the second oblique-stayed connecting fitting 1242, and there is no limitation here.

[0128] Combination Figure 1 , Figure 2 , Fig.15 and Fig.16 In this embodiment, the post insulator 1210 also includes a post connection fitting 1250 for connecting the tower body 1100 and the post insulator 1210 , and the post connection fitting 1250 includes an end flange tube 1251 , an end flange plate 1252 and a first mounting plate 1253 .

[0129] The end flange tube 1251 is set as a hollow structure along the axial direction, and is sleeved on the end of the support insulator 1210 connected to the tower body 1100, specifically sleeved on one end of the insulator 1211; the end flange plate 1252 covers the end of the end flange tube 1251 away from the insulator 1211, which is used to prevent the end of the insulator 1211 from being corroded by external water vapor, etc., and protects the insulator 1211; the end of the first mounting plate 1253 abuts against the disk surface of the end flange plate 1252 away from the end flange tube 1251, and at the same time, a second mounting portion 12531 is provided on the first mounting plate 1253, which is used to install the first mounting plate 1253 on the tower body 1100 to achieve the connection between the support insulator 1210 and the tower body 1100. In an application scenario, the second mounting portion 12531 is a through hole. At this time, the first mounting plate 1253 can be installed on the tower body 1100 by using fasteners such as bolts through the through hole.

[0130] In an application scenario, such as Fig.16 As shown, the first mounting plate 1253 is a straight plate, and in order to ensure the connection firmness between the tower body 1100 and the support 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. Of course, in other application scenarios, the number of the first mounting plates 1253 can also be one, three, etc. Fig.16 As shown, the two first mounting plates 1253 are both vertically arranged on the end flange 1252. Of course, in other application scenarios, the first mounting plates 1253 may not be vertically arranged on the end flange 1252, which is not limited here.

[0131] Continue to combine Figure 1 and Fig.15 In order to enable the pillar connecting hardware 1250 to adapt to different application scenarios, the pillar connecting hardware 1250 also includes a second mounting plate 1254, which is detachably connected to the first mounting plate 1253 and is used to connect the first mounting plate 1253 and the tower body 1100, so that the first mounting plate 1253 can be directly connected to the tower body 1100 according to different needs, or the first mounting plate 1253 can be connected to the tower body 1100 through the second mounting plate 1254.

[0132] In an application scenario, such as Fig.15 As shown, in order to increase the contact area between the second mounting plate 1254 and the tower body 1100 and ensure the connection strength between the second mounting plate 1254 and the tower body 1100, the second mounting plate 1254 is a bent plate, one end of which is in contact with the crossbeam on the tower body 1100 and the other end is in contact with the first mounting plate 1253.

[0133] In one application scenario, combined with Fig.15 and Fig.16, the number of the first mounting plates 1253 is equal to the number of the second mounting plates 1254 , and one second mounting plate 1254 is mounted with one first mounting plate 1253 .

[0134] See also Figures 17 to 19 Different from the above-mentioned embodiment, in the composite crossarm 2200 of this embodiment, the end fitting 2230 further includes a second flange tube 2237, which is axially arranged as a hollow structure, coaxially arranged with the first flange tube 2231 and connected to the other end of the first flange tube 2231 away from the sealing plate 2232, wherein the outer peripheral surface of the second flange tube 2237 is smooth.

[0135] Specifically, since the outer circumference of the second flange tube 2237 is smooth, the second flange tube 2237 with a smooth outer circumference can be fixed to the periphery of the post insulator 2210 by a crimping process. Since the first flange tube 2231 is connected to the second flange tube 2237, when the second flange tube 2237 is fixed to the periphery of the post insulator 2210 by a crimping process, the first flange tube 2231 can also be fixed to the periphery of the post insulator 2210, that is, the end fitting 2230 can be fixed to the periphery of the post insulator 2210 by a crimping process.

[0136] The aforementioned embodiment adopts a gluing process to install the end fitting 1230 on the post insulator 1210. Compared with the crimping process, the gluing process has a long process time, low molding efficiency, and requires a large number of molding tools. In addition, the post insulator 1210 after molding is poor in bearing bending load and torsional load. That is to say, this embodiment adopts a crimping process to install the end fitting 2230 on the post insulator 2210, which can improve production efficiency, reduce production costs (reduce the use of molding tools), and ensure that the post insulator 2210 is strong in bearing bending load and torsional load.

[0137] In this embodiment, the first flange cylinder 2231 is detachably connected to the second flange cylinder 2237. This arrangement allows the end fittings 2230 to be separated during transportation, which facilitates transportation, and when the first flange cylinder 2231 or the second flange cylinder 2237 is damaged, it can be replaced in time to avoid scrapping the entire end fittings 2230.

[0138] Meanwhile, during transportation, only the second flange tube 2237 can be fixed on the post insulator 2210, and then after arriving at the destination, the first flange tube 2311 is connected to the second flange tube 2237, thereby reducing the packaging cost of the post insulator 2210 during transportation.

[0139] See also Fig.19 and Fig. 20The end fitting 2230 also includes a first flange 2238 and a second flange 2239 .

[0140] The first flange 2238 is arranged at the other end of the first flange tube 2231 away from the sealing plate 2232 and is sleeved on the periphery of the first flange tube 2231; the second flange 2239 is arranged at one end of the second flange tube 2237 and is sleeved on the periphery of the second flange tube 2237, wherein the first flange 2238 and the second flange 2239 are detachably connected to realize the detachable connection between the first flange tube 2231 and the second flange tube 2237. Specifically, this arrangement can indirectly increase the contact area between the first flange tube 2231 and the second flange tube 2237, thereby increasing the connection strength between the first flange tube 2231 and the second flange tube 2237.

[0141] See also Fig. 20 Matching locking holes 22381 are respectively provided on the first flange 2238 and the second flange 2239, so that the first flange 2238 and the second flange 2239 can be connected together by using locking members (such as bolts) passing through the locking holes 22381.

[0142] In other embodiments, a matching snap-fit ​​structure may also be provided on the first flange 2238 and the second flange 2239, so that the first flange 2238 and the second flange 2239 can be detachably connected by snapping. In short, this application does not impose any restrictions on how the first flange 2238 and the second flange 2239 can be detachably connected.

[0143] Among them, in other embodiments, the end fitting 2230 may include a third flange tube, a fourth flange tube or even more flange tubes in addition to the first flange tube 2231 and the second flange tube 2237, that is, at this time, the number of flange tubes in the end fitting 2230 is more than two, and at this time, multiple flange tubes in the end fitting 2230 are coaxially arranged and connected in sequence, for example, the fourth flange tube, the third flange tube, the second flange tube 2237 and the first flange tube 2231 are connected in sequence, or the second flange tube 2237, the fourth flange tube, the third flange tube and the first flange tube 2231 are connected in sequence, and at the same time, in addition to the smooth outer circumference of the second flange tube 2237, the third flange tube, the fourth flange tube or other flange tubes can also be flange tubes with a smooth outer circumference, or the oblique-stayed insulator 2220 can be connected to the third flange tube, the fourth flange tube or other flange tubes in addition to being connected to the first flange tube 2231.

[0144] At the same time, when the end fitting 2230 also includes a third flange tube, a fourth flange tube or even more flange tubes, the connection method between two adjacent flange tubes can be the same as the connection method between the first flange tube 2231 and the second flange tube 2237. For example, two adjacent flange tubes are detachably connected, and the two adjacent flange tubes are detachably connected by flange plates sleeved on their respective ends, and matching locking holes 22381 are respectively provided on the two detachably connected flange plates, so that the two adjacent flange plates can be connected together by using a locking piece passing through the locking hole 22381.

[0145] See also Fig.21 and Fig. 22 , Fig.21 is a structural schematic diagram of another embodiment of the transmission tower of the present application, Fig. 22 yes Fig.21 , which is different from the above-mentioned embodiment, the tower body 3100 in this embodiment includes a tower pole 3110, and the ends of the support insulator 3210 and the inclined insulator 3220 in the composite cross arm 3200 are both connected to the tower pole 3110.

[0146] The tower pole 3110 may be a steel pipe pole, or a solid pole or a hollow pole made of other materials such as composite materials, iron, alloy, etc., and is not limited here.

[0147] At the same time, in order to install the composite cross arm 3200 on the tower 3110, combined with Fig.23 The transmission tower 3000 further includes a cross arm connection fitting 3300. The cross arm connection fitting 3300 connects one end of the support insulator 3210 that is not connected to the inclined insulator 3220 and one end of the inclined insulator 3220 that is not connected to the support insulator 3210 to the tower pole 3110, thereby installing the composite cross arm 3200 on the tower body 3100, specifically on the tower pole 3110.

[0148] Among them, the cross arm connecting hardware 3300 includes a connecting rod 3310, a tower flange tube 3320 and a tower flange plate 3330.

[0149] In this embodiment, the number of the oblique insulators 3220 is three, wherein two oblique insulators 3220 whose axes are in the same plane as the axis of the post insulator 3210 are defined as first oblique insulators 3221, and the remaining oblique insulators 3220 are defined as second oblique insulators 3222, wherein the distances from the second oblique insulators 3222 to the two first oblique insulators 3221 are equal.

[0150] And, for the sake of convenience, the oblique connection fitting 3240 connecting the tower pole 3110 and the first oblique insulator 3221 is defined as the first oblique connection fitting 3241, and the oblique connection fitting 3240 connecting the tower pole 3110 and the second oblique insulator 3222 is defined as the second oblique connection fitting 3242.

[0151] There are two connecting rods 3310, and the two connecting rods 3310 respectively connect the two first oblique insulators 3221 with the tower pole 3110, that is, the first oblique connecting fitting 3241 connected to the end of the first oblique insulator 3221 is connected to the connecting rod 3310; one end of the tower body flange tube 3320 is connected to the tower pole 3110; the tower body flange plate 3330 covers the end of the tower body flange tube 3320 away from the tower pole 3110 and is connected to the support insulator 3210.

[0152] In an application scenario, such as Fig. 22 and Fig.23 As shown, the two connecting rods 3310 are both arranged perpendicular to the tower pole 3110 , and the heights of the two connecting rods 3310 relative to the tower pole 3110 are the same.

[0153] Of course, in other application scenarios, the two connecting rods 3310 may not be set vertically with the tower 3110, or the heights of the two connecting rods 3310 relative to the tower 3110 may be different. The specific setting method can be determined by the structure of the composite cross arm 3200 and is not limited here.

[0154] In another application scenario, the two connecting rods 3310 and the tower flange tube 3320 are fixed to the tower pole 3110 by welding. Of course, they can also be fixed by other forms, which are not limited here.

[0155] At the same time, different from the above-mentioned implementation mode, Fig. 22 and Fig.23 As shown, the tower body flange 3330 in the cross arm connection fitting 3300 is butted against the end flange 3252 in the support connection fitting 3250 to achieve installation of the support insulator 3210 .

[0156] Continue reading Fig. 22 and Fig.23 The cross arm connection fitting 3300 also includes a reinforcement ring 3340 and a reinforcement rib 3350 .

[0157] The reinforcement ring 3340 is sleeved on the periphery of the tower pole 3110, and the two ends of the reinforcement rib 3350 are respectively connected to the reinforcement ring 3340 and the tower body flange tube 3320, and the side wall of the reinforcement rib 3350 is in contact with the tower pole 3110, thereby further indirectly increasing the contact area between the tower body flange tube 3320 and the tower pole 3110, and ensuring the connection strength between the tower body flange tube 3320 and the tower pole 3110.

[0158] The number of the reinforcement rings 3340 can be one or two. When the number of the reinforcement rings 3340 is two, as shown in FIG. Fig.23 As shown, two reinforcement rings 3340 are arranged on two opposite sides of the tower flange tube 3320, and for the tower flange tube 3320, it is connected to the two reinforcement rings 3340 respectively through two reinforcement ribs 3350.

[0159] Continue reading Fig. 22 and Fig.23 The cross arm connection fitting 3300 further includes a reinforcing plate 3360, both ends of which are respectively connected to the connecting rod 3310 and the tower flange tube 3320, and a side wall of the reinforcing plate 3360 is in contact with the tower pole 3110, thereby indirectly increasing the contact area between the connecting rod 3310, the tower flange tube 3320 and the tower pole 3110, and ensuring the connection strength between the connecting rod 3310, the tower flange tube 3320 and the tower pole 3110.

[0160] At the same time, in order to further increase the connection strength between the connecting rod 3310 and the tower body flange tube 3320, the connecting rod 3310 can also be connected to the reinforcement ring 3340 through the reinforcement rib 3350. At this time, the reinforcement rib 3350 connecting the reinforcement ring 3340 and the connecting rod 3310 and the reinforcement rib 3350 connecting the reinforcement ring 3340 and the tower body flange tube 3320 are arranged in the same manner. For details, please refer to the above and will not be repeated here.

[0161] It should be noted that the reinforcement ring 3360 and the reinforcement ring 3340 may exist at the same time, or only one of them may exist, or neither of them exists (for details, please refer to Fig.21 and Fig.24 ).

[0162] At the same time, the reinforcement ring 3340, the reinforcement rib 3350 and the reinforcement plate 3360 can be fixedly connected with the two connecting rods 3310 and the tower flange tube 3320 by welding or the like to form a cross-arm connection hardware 3300. Of course, the cross-arm connection hardware 3300 can also be integrally formed and there is no restriction here.

[0163] Continue reading Fig. 22 The cross arm connection fitting 3300 also includes a connection ear 3370, which is fixed to the tower pole 3110. The fixing method of the connection ear 3370 and the tower pole 3110 is consistent with the fixing method of the connecting rod 3310, the tower body flange tube 3320 and the tower pole 3110, and will not be repeated.

[0164] The oblique-stayed connection fitting 3240 (second oblique-stayed connection fitting 3242) connected to the end of the second oblique-stayed insulator 3222 is connected to the connection ear 3370. Specifically, the second oblique-stayed connection fitting 3242 is connected to the connection ear 3370 through a U-shaped ring. The connection ear 3370 is a thin plate with a connection hole. After the U-shaped ring is locked and connected to the second oblique-stayed connection fitting 3242 through a fastener, it is also locked and fixed to the connection hole on the connection ear 3370 through a fastener. In other embodiments, the second oblique-stayed connection fitting 3242 can also be connected to the tower pole 3110 through a connecting rod 3310, which is not limited here.

[0165] See also Fig.25 The present application also protects an end fitting, and the end fitting 4000 has the same structure as the end fitting in the aforementioned embodiment. For details, please refer to the aforementioned embodiment, which will not be repeated here.

[0166] See also Fig.26 The present application also protects a composite cross arm, and the composite cross arm 5000 has the same structure as the composite cross arm in the aforementioned embodiment. For details, please refer to the aforementioned embodiment, which will not be repeated here.

[0167] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A post insulator, characterized in that: include: Insulator; An shed skirt is covered on the outer periphery of the insulator; A support connection fitting, one end of the insulator is connected to the support connection fitting to install the support insulator on the tower body, and the support connection fitting includes: An end flange cylinder is provided as a hollow structure along the axial direction of the end flange cylinder and is sleeved on one end of the insulator; An end flange plate, covering an end of the end flange cylinder away from the insulator; a first mounting plate, an end of which abuts against a disk surface of the end flange away from the end flange tube, and the first mounting plate is used to connect with the tower body, thereby realizing the installation of the post insulator; The post insulator further comprises an end fitting, wherein the end fitting comprises: The first flange tube is provided with a hollow structure along the axial direction of the first flange tube and is sleeved on the other end of the insulator. The inner wall of the first flange tube is provided with a plurality of glue grooves spaced along the axial direction of the first flange tube. The glue grooves are filled with adhesive to fix the first flange tube and the insulator. The width of the glue grooves does not exceed 12 mm. The ratio of the length of the inner wall of the first flange tube in contact with the insulator to the outer diameter of the insulator is in the range of 0.8 to 1.

2. A sealing plate covers one end of the first flange tube, the sealing plate is provided with a first sealing groove facing the end face of the insulator on the disk surface facing the insulator, a first sealing member is provided in the first sealing groove, the inner wall of the first flange tube is provided with a second sealing groove adjacent to the sealing plate, the second sealing groove and the plurality of glue grooves are arranged in sequence in a direction away from the sealing plate, and a second sealing member is provided in the second sealing groove.

2. The post insulator according to claim 1, characterized in that: The first mounting plate is provided with a through hole for fasteners to pass through so as to mount the first mounting plate on the tower body.

3. The post insulator according to claim 1, characterized in that: The first mounting plate is a straight plate. There are two first mounting plates. The two first mounting plates are arranged parallel to each other, and the two first mounting plates are vertically arranged on the end flange.

4. The post insulator according to claim 1, characterized in that: The pillar connection hardware further comprises: The second mounting plate is detachably connected to the first mounting plate and is used to connect the first mounting plate and the tower body.

5. The post insulator according to claim 4, characterized in that: The first mounting plate is a straight plate, the second mounting plate is a bent plate, one end of the second mounting plate is in contact with the first mounting plate, and the other end of the second mounting plate is in contact with the crossbeam on the tower body.

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

7. The post insulator according to claim 1, characterized in that: The umbrella skirt includes a plurality of identical umbrella bodies which are arranged at intervals, and the umbrella bodies are radially symmetrical relative to the insulator.

8. A composite cross arm, characterized in that: It comprises the post insulator and the diagonal insulator as described in any one of claims 1 to 7, one end of the diagonal insulator is fixedly connected to the first flange tube, so that the diagonal insulator is connected to the end of the post insulator that is not connected to the tower body, and the end hardware also comprises a second flange tube coaxially arranged with the first flange tube, and the outer peripheral surface of the second flange tube is smooth.

9. The composite cross arm according to claim 8, characterized in that: The first flange cylinder is detachably connected to the second flange cylinder.

10. The composite cross arm according to claim 9, characterized in that: A first flange is sleeved on the outer periphery of the end of the first flange tube away from the sealing plate, and a second flange is sleeved on the outer periphery of the end of the second flange tube. The first flange is detachably connected to the second flange to achieve detachable connection between the first flange tube and the second flange tube.

Images