CN114482673A - Power transmission tower - Google Patents

Abstract

The application discloses transmission tower, this transmission tower includes: the tower body is provided with two sides which are arranged in a back-to-back manner, the two sides are both provided with first connecting beams, and meanwhile, the tower body is also provided with a reinforcing beam which is bridged on the first connecting beams on the two sides; and the composite cross arm is connected with the reinforcing cross beam. The application provides a transmission tower can improve the transmission line on the one hand and to ground distance, ensures electric environment safety around, and on the other hand can guarantee transmission tower's joint strength.

Description

Power transmission tower

Technical Field

The application relates to the technical field of power transmission, in particular to a power transmission tower.

Background

The traditional power transmission tower hanging wire mainly adopts a mode of connecting a wire by an iron cross arm and a suspension line insulator, and the mode has the problems of wind deflection and electricity jump, too low ground distance, easy flashover with surrounding tree buildings in an extreme natural environment and the like. At present, in a person-dense area, the traditional iron cross arm hanging wire has the casualty accidents caused by insufficient distance margin of a wire to the ground or increased building height caused by violation of regulations, so that technical transformation on stock power grid engineering with the problems is not easy in the global range.

Disclosure of Invention

The utility model provides a transmission tower can improve the transmission line and to ground distance, ensures electrical environment safety on every side to and guarantee transmission tower's joint strength.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided a transmission tower, comprising: the tower body is provided with two sides which are arranged in a back-to-back manner, the two sides are both provided with first connecting beams, and meanwhile, the tower body is also provided with a reinforcing beam which is bridged on the first connecting beams on the two sides; and the composite cross arm is connected with the reinforcing cross beam.

Above-mentioned transmission tower sets up compound cross arm on the one hand and is connected with the body of the tower to can replace the suspension insulator to hang and establish the transmission line with hanging the line gold utensil, compare prior art and can improve the distance of transmission line to the ground, effectively ensure electric environment safety on every side, on the other hand strengthening beam cross-over is on the first connecting beam of body of the tower both sides, its joint strength with the body of the tower is big, be connected compound cross arm and strengthening beam, can guarantee the joint strength of compound cross arm, avoid under the extreme typhoon weather, compound cross arm appears rocking acutely, with accidents such as body of the tower separation, the security performance is improved.

The reinforcing cross beam comprises a reinforcing plate and two reinforcing pieces arranged at two ends of the reinforcing plate respectively, the two reinforcing pieces are arranged on the first connecting cross beams at two sides respectively, and the composite cross arm is connected with the reinforcing pieces. The reinforcing part with compound cross arm is connected with reinforcing plate and first connecting beam simultaneously, can improve the installation fastness of reinforcing part, and then guarantees compound cross arm's joint strength.

The number of the reinforcing plates is two, and the two reinforcing pieces are respectively clamped between the end parts of the two reinforcing plates.

The number of the reinforcing plates is one, and the reinforcing plates are fixed on the two reinforcing pieces in a bridging mode.

Wherein the composite cross arm comprises: one end of the post composite insulator is connected with a second connecting cross beam on the tower body, wherein the second connecting cross beam is arranged at the same side of the first connecting cross beam at a certain distance; and one end of the diagonal composite insulator is connected with the reinforcing cross beam, and the other end of the diagonal composite insulator is far away from the other end of the tower body, so that a stable support structure with an included angle is formed between the pillar composite insulator and the diagonal composite insulator, and the integral mechanical strength of the composite cross arm is further ensured.

Wherein the transmission tower further comprises: the first connecting assembly is connected with the oblique-pulling composite insulator and the reinforcing cross beam, wherein the length of the first connecting assembly is adjustable so as to adjust the distance between the oblique-pulling composite insulator and the reinforcing cross beam, so that the power transmission tower is flexible and changeable, and the power transmission tower is suitable for multiple different application scenes.

Wherein the first connection assembly comprises: one end of the first adjusting plate is connected with the cable-stayed composite insulator; and one end of the second adjusting plate is connected with the reinforcing cross beam, wherein the first adjusting plate is fixed on the second adjusting plate in an adjustable position.

Wherein, post composite insulator with the one end that the crossbeam is connected to the second is provided with the flange, the flange includes: the flange cylinder is sleeved on the periphery of the pillar composite insulator; at least two flange boards, follow the circumference interval setting of a flange section of thick bamboo and with a flange section of thick bamboo is connected, wherein, at least two the flange board is used for connecting the pillar composite insulator with the crossbeam is connected to the second, guarantees the joint strength of pillar composite insulator and second connection crossbeam.

Wherein the transmission tower further comprises: the second connecting assembly is used for connecting the second connecting beam with the flange and comprises a plurality of groups of clamping plates; the second connecting beam comprises a beam body and a connecting plate arranged on the beam body; on the post composite insulator the flange board difference fixation clamp is established the multiunit the one end of splint, the crossbeam is connected to the second the connecting plate difference fixation clamp is established the multiunit the other end of splint, in order to realize post composite insulator with the crossbeam is connected to the second, further guarantees post composite insulator and the second and is connected the joint strength of crossbeam, and then improves the intensity of transmission tower.

The flange plate, the clamping plate and the connecting plate are respectively provided with matched locking holes, so that the pillar composite insulator, the second connecting assembly and the second connecting cross beam are fixedly connected together by utilizing a locking piece penetrating through the locking holes.

The beneficial effect of this application is: the utility model provides a transmission tower sets up compound cross arm on the one hand and is connected with the body of a tower, because compound cross arm has good insulating properties, consequently can replace suspension insulator with hanging the line gold utensil and hang and establish the power transmission line, compare prior art and can improve the distance of power transmission line to the ground, effectively ensure electric environment safety around the periphery, on the other hand web beam bridges on the first connection crossbeam of body of a tower both sides, its joint strength with the body of a tower is big, be connected compound cross arm and web beam, can guarantee the joint strength of compound cross arm, avoid under the extreme typhoon weather, compound cross arm appears swaying acutely, with accidents such as body of a tower separation, the security performance is improved.

Meanwhile, a stable support structure with an included angle is formed between the cable-stayed composite insulator and the post composite insulator in the composite cross arm, so that on one hand, accidents such as deformation or breakage of the composite cross arm can be avoided in extreme typhoon weather, on the other hand, windage yaw flashover accidents caused by the fact that a power transmission line is close to a tower body due to wind swing can be avoided, and the power utilization stability is ensured.

Meanwhile, the first connecting assembly with the adjustable length is arranged to connect the cable-stayed composite insulator and the reinforcing cross beam, so that the power transmission tower is flexible and changeable and is suitable for different application scenes.

The flange that sets up on second coupling assembling including multiunit splint connects second connection crossbeam and post composite insulator in addition, can guarantee post composite insulator's installation intensity, further improves the intensity of transmission tower.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

fig. 1 is a schematic flow diagram of an embodiment of a method for retrofitting a transmission tower according to the present application;

fig. 2 is a schematic structural diagram of a power transmission tower modified by the modification method of fig. 1;

FIG. 3 is a schematic structural view of the connection between the cable-stayed composite insulator and the reinforcing cross beam in FIG. 2;

FIG. 4 is a schematic diagram of the reinforcement beam of FIG. 2 in an application scenario;

FIG. 5 is a schematic diagram of the reinforcement beam of FIG. 2 in another application scenario;

fig. 6 is a schematic structural diagram of an embodiment of a transmission tower of the present application;

FIG. 7 is a schematic structural view of the connection between the cable-stayed composite insulator and the reinforcing cross beam in FIG. 6;

FIG. 8 is a schematic diagram of the reinforcement beam of FIG. 6 in an application scenario;

FIG. 9 is a schematic diagram of the reinforcement beam of FIG. 6 in another application scenario;

FIG. 10 is a schematic view of the structure at the first connection assembly of FIG. 6;

FIG. 11 is a schematic structural view of the connection of the post composite insulator and the second connecting beam of FIG. 6;

fig. 12 is an exploded view of the post composite insulator of fig. 6 at the junction with a second connecting beam;

fig. 13 is a schematic structural view of the connection between the cable-stayed composite insulator and the post composite insulator in fig. 6.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The transformation method of this application transmission tower is to traditional transmission tower transformation, and traditional transmission tower generally includes the body of the tower and the iron cross arm of being connected with the body of the tower, and the tip of iron cross arm still is connected with the suspension insulator who hangs and establish the power transmission line simultaneously.

The transformation method of the power transmission tower is high in overall efficiency, the body of the traditional power transmission tower does not need to be transformed, the transformation cost can be reduced to the greatest extent, and the specific transformation process is as follows:

referring to fig. 1 and 2, fig. 1 is a schematic flow diagram of an embodiment of a method for modifying a transmission tower according to the present application, and fig. 2 is a schematic structural diagram of a modified transmission tower according to the embodiment, where it should be noted that, since a tower body before modification and a tower body after modification are not changed, the tower body before modification and the tower body after modification are denoted by the same reference numeral.

The transformation method of the power transmission tower comprises the following steps:

s110: the transmission line is separated from the suspension insulator of the transmission tower and secured to the body 1100 of the transmission tower.

Specifically, the transmission line is temporarily attached to the tower body 1100 of the transmission tower after being removed from the suspension insulator.

In one application scenario, the support is first installed on the tower 1100 and the power lines are then placed on the support. At this time, the power transmission line is supported by the supporting piece, so that the potential safety hazard of power jumping caused by insufficient electrical distance between the power transmission line and the tower body 1100 can be avoided. Wherein the supporting member may be a pulley, a supporting rod, etc., without limitation.

The tower 1100 is a truss tower that is common in the art and will not be described herein.

S120: the suspension insulator of the transmission tower and the iron cross arm connected to the tower body 1100 are removed.

In order not to affect the installation of the subsequent composite cross arm 1200, the connecting assembly connecting the tower body 1100 and the iron cross arm, for example, a connecting cross beam connecting the tower body 1100 and the iron cross arm, is also removed at the same time of removing the iron cross arm.

S130: an insulating composite cross arm 1200 is mounted on the tower body 1100, and a wire-hanging fitting is mounted on an end of the composite cross arm 1200.

In particular, the composite cross arm 1200 has many advantages of high strength, light weight, corrosion resistance, easy processing, designability, good insulation, and the like, and is more and more regarded as important by the engineering industry.

After the composite cross arm 1200 is adopted, the composite cross arm 1200 has good insulating property, so that a hanging wire fitting can be used for replacing a suspension insulator to hang a transmission line, wherein the length of the hanging wire fitting is far smaller than that of the suspension insulator, so that the distance of the transmission line to the ground can be increased compared with the original transmission tower in the modified transmission tower, the safety of the surrounding electrical environment is effectively guaranteed, and meanwhile, the potential safety hazard of power jumping caused by insufficient electrical distance between the transmission line and the tower body 1100 due to overlarge wind deflection can be eliminated due to the good insulating property of the composite cross arm 1200.

S140: the power transmission line is separated from the tower body 1100 and hung on a line-hanging fitting.

Wherein the support member mounted on the tower body 1100 is also removed after the power line is separated from the tower body 1100.

Referring to fig. 2, in order to facilitate installation of the composite cross arm 1200 and ensure the installation firmness of the composite cross arm 1200, the step of installing the insulated composite cross arm 1200 on the tower body 1100 includes: mounting a cross beam assembly 1300 matching the composite cross arm 1200 on the tower body 1100; composite cross arm 1200 is mounted to cross-beam assembly 1300 to mount composite cross arm 1200 to tower 1100.

Continuing with fig. 2, beam assembly 1300 includes a first connecting beam 1310 and a second connecting beam 1320, and composite beam 1200 includes a cable-stayed composite insulator 1210 and a post composite insulator 1220.

The cable-stayed composite insulator 1210 and the pillar composite insulator 1220 are made of composite materials, and have the advantages of light weight, simple structure, convenience in installation, good insulating property and the like, and meanwhile, the cable-stayed composite insulator 1210 and the pillar composite insulator 1220 respectively comprise an insulator positioned inside and a rubber umbrella skirt coated outside the insulator. The insulator can be an insulating tube or an insulating core rod, the insulating tube can be a glass fiber reinforced plastic tube which is formed by winding, curing and molding glass fiber impregnated with epoxy resin or formed by pultrusion, and can also be an aramid fiber impregnated with epoxy resin and formed by winding, curing and molding aramid fiber impregnated with epoxy resin; the insulating core rod can be a solid core rod or a hollow pultrusion tube which is formed by winding and pultrusion of glass fiber or aramid fiber impregnated epoxy resin, the rubber umbrella skirt can be made of high-temperature vulcanized silica gel, and also can be made of rubber materials in other forms, and the structure and the materials of the cable-stayed composite insulator 1210 and the strut composite insulator 1220 are not limited in the application.

With continued reference to fig. 2, the step of installing a cross-beam assembly 1300 that matches composite cross-arm 1200 on tower 1100 includes: the first connecting beam 1310 and the second connecting beam 1320 are installed on the same side of the tower 1100, and the first connecting beam 1310 and the second connecting beam 1320 are disposed at a distance.

Specifically, the first connecting beam 1310 and the second connecting beam 1320 of one beam assembly 1300 are installed on the same side of the tower 1100, and the first connecting beam 1310 and the second connecting beam 1320 are spaced apart from each other in order to be connected to the cable-stayed composite insulator 1210 and the post composite insulator 1220, respectively.

In one application scenario, as shown in fig. 2, the first connecting beam 1310 and the second connecting beam 1320 are arranged side by side in parallel.

In one application scenario, to avoid the need to make holes in the tower 1100 during installation of the beam assembly 1300, the first connecting beam 1310 and/or the second connecting beam 1320 are connected to the mounting plate 1110 on the tower 1100. Specifically, the first connecting beam 1310 and the second connecting beam 1320 may be both connected to the fixing plate 1110 on the tower 1100, or only the first connecting beam 1310 or only the second connecting beam 1320 may be connected to the fixing plate 1110 on the tower 1100, wherein the fixing plate 1110 may be a fire bent plate.

Specifically, the fixing plate 1110 belongs to the tower body 1100 of the original power transmission tower, and the beam assembly 1300 is connected to the fixing plate 1110, so that holes do not need to be additionally drilled in the tower body 1100 of the original power transmission tower, and the overall strength of the tower body 1100 is ensured.

With continued reference to fig. 2, in one application scenario, the step of installing composite cross-arm 1200 on cross-beam assembly 1300 includes: connecting one end of the cable-stayed composite insulator 1210 with a first connecting beam 1310; connecting one end of the post composite insulator 1220 with the second connecting beam 1320; the other end of the post composite insulator 1220, which is far from the second connecting beam 1320, is connected to the other end of the cable-stayed composite insulator 1210, which is far from the first connecting beam 1310, so that a stable bracket structure with an included angle is formed between the post composite insulator 1220 and the cable-stayed composite insulator 1210.

Specifically, the included angle formed between the post composite insulator 1220 and the cable-stayed composite insulator 1210 may be an acute angle, a right angle or an obtuse angle (fig. 2 schematically illustrates an acute angle).

Set up simultaneously and form the outrigger structure who has the contained angle between pillar composite insulator 1220 and the oblique-pulling composite insulator 1210 to under extreme typhoon weather, compound cross arm 1200 is non-deformable or breaks, and can restrain the power transmission line because of the wind pendulum and be close to the windage yaw flashover accident that arouses with the body of a tower 1100, guarantees the safe electric clearance between power transmission line and the body of a tower 1100 under the strong wind operating mode, guarantees the stability ability of user's power consumption.

In another application scenario, in order to reduce the time of the installer for working at high altitude and improve the installation efficiency, when installing the composite cross arm 1200, the cable-stayed composite insulator 1210 and the post composite insulator 1220 may be movably connected in advance, and then integrally hoisted (in the hoisting process, because the cable-stayed composite insulator 1210 and the post composite insulator 1220 are movably connected, they may be folded together), and then both are respectively connected with the cross beam assembly 1300, specifically, the step of installing the composite cross arm 1200 on the cross beam assembly 1300 at this time includes: one end of the post composite insulator 1220 is movably connected with one end of the diagonal composite insulator 1210; the other end of the post composite insulator 1220 and the other end of the cable-stayed composite insulator 1210 are connected to the beam assembly 1300, respectively, so that a stable bracket structure with an included angle is formed between the post composite insulator 1220 and the cable-stayed composite insulator 1210.

In one application scenario, as shown in FIG. 2, composite cross arm 1200 is attached to the middle of a cross-beam assembly 1300. Specifically, the cable-stayed composite insulator 1210 is connected to the middle of the first connecting beam 1310, and the post composite insulator 1220 is connected to the middle of the second connecting beam 1320, so that the tower 1100 is stressed uniformly.

In other embodiments, composite cross arm 1200 may be attached to beam assembly 1300 at other locations, such as near a side of tower 1100. In one embodiment, two sets of composite cross arms 1200 are connected to one beam assembly 1300, and the two sets of composite cross arms 1200 are symmetrically disposed about a centerline of the beam assembly 1300. Specifically, two diagonal composite insulators 1210 of two sets of composite cross arms 1200 are symmetrically connected to two sides of the middle of a first connecting cross beam 1310, and two post composite insulators 1220 are symmetrically connected to two sides of the middle of a second connecting cross beam 1320.

In other embodiments, the composite cross arm 1200 may also adopt other forms of structures, for example, the composite cross arm 1200 includes two post composite insulators 1220 and two cable-stayed composite insulators 1210, one end of each of the two post composite insulators 1220 is connected to the tower 1100, and the other ends of the two post composite insulators 1220 are connected to each other to serve as a wire hanging point, so that the two post insulators 1220 form a V-shaped structure with the wire hanging point as a vertex; one end of each of the two cable-stayed composite insulators 1210 is connected and fixed to the tower body 1100 and located above the end where the two pillar composite insulators 1220 and the tower body 1100 are fixed, and the other end of each of the two cable-stayed composite insulators 1210 is connected to a cable hanging point, so that the two cable-stayed composite insulators 1210 form a V-shaped structure with the cable hanging point as a vertex. Of course, the composite cross arm 1200 may further include two post composite insulators 1220 and one cable-stayed composite insulator 1210, or include a combination of other forms such as one post composite insulator 1220 and three cable-stayed composite insulators 1210, and the specific connection manner is not limited as long as the composite cross arm can support and hook the power transmission line.

Continuing to refer to fig. 2, when the beam assembly 1300 is installed on the tower 1100, the beam assembly 1300 is symmetrically installed on the two opposite sides of the tower 1100, and the step of connecting one end of the cable-stayed composite insulator 1210 with the first connecting beam 1310 includes: fixing a reinforcing beam 1330 across two first connecting beams 1310 symmetrical with respect to the tower 1100; one end of the cable-stayed composite insulator 1210 is connected with the reinforcing cross beam 1330.

Specifically, the two first connecting beams 1310 are fixed to the reinforcing beam 1330 in a bridging manner, so that the stress of the composite cross arm 1200 on the tower body 1100 can be further borne, and the connection strength between the composite cross arm 1200 and the tower body 1100 and the mechanical strength of the whole composite cross arm 1200 can be ensured.

In other embodiments, the reinforcing cross member 1330 may be bridged and fixed to two second connecting cross members 1320 symmetrical to the tower 1100, and then one end of the post composite insulator 1220 may be connected to the reinforcing cross member 1330. The reinforcing beam 1330 fixed across the two first connecting beams 1310 may be the same as or different from the reinforcing beam 1330 fixed across the two second connecting beams 1320, which is not limited herein.

In other embodiments, a plurality of reinforcing beams 1330 may be provided to accommodate various combination structures of the composite cross arm 1200 including the post composite insulator 1220 and the cable-stayed composite insulator 1210, the plurality of reinforcing beams 1330 are fixed across two first connecting beams 1310 symmetrical with respect to the tower 1100, and the plurality of reinforcing beams 1330 may be arranged side by side in parallel, or may intersect with each other.

In the present embodiment, as shown in fig. 2, composite cross arms 1200 are symmetrically installed on both sides of a tower 1100 that are disposed opposite to each other.

The composite cross arms 1200 are symmetrically mounted on two opposite sides of the tower body 1100, so that the modified power transmission tower can be used for a double-loop power transmission line or a single-loop power transmission line. Specifically, when the power transmission tower is used for a double-circuit power transmission line, three sets of bilaterally symmetrical composite cross arms 1200 are installed in parallel on the tower body 1100, and when the power transmission tower is used for a single-circuit power transmission line, one set of bilaterally symmetrical composite cross arms 1200 are installed on the tower body 1100 and in addition, one composite cross arm 1200 is installed separately on one of both sides of the tower body 1100, that is, two composite cross arms 1200 are installed on one side of the tower body 1100 and one composite cross arm 1200 is installed on the other side.

In this embodiment, with reference to fig. 2, 3 and 4, the reinforcing beam 1330 includes a reinforcing plate 1331 and two reinforcing members 1332 respectively disposed at two ends of the reinforcing plate 1331, wherein the two reinforcing members 1332 are respectively disposed on the two first connecting beams 1310, and the step of connecting one end of the cable-stayed composite insulator 1210 to the reinforcing beam 1330 includes: one end of the cable-stayed composite insulator 1210 is connected with a reinforcement 1332.

Specifically, the reinforcement 1332 connected to the cable-stayed composite insulator 1210 is connected to both the reinforcement plate 1331 and the first connecting beam 1310, and has high connection strength with the tower body 1100, and is not easily separated from the tower body 1100, so that the connection strength between the cable-stayed composite insulator 1210 and the tower body 1100 can be ensured.

In other embodiments, the reinforcement 1332 may not be disposed on the first connecting beam 1310, and is not limited herein.

Meanwhile, as shown in fig. 3, in an application scenario, the reinforcement 1332 is a plate, in order to facilitate connection with the cable-stayed composite insulator 1210, one end of the reinforcement 1332 protrudes from the first connecting cross beam 1310 in a direction away from the tower 1100, and the reinforcement 1332 is provided with a plurality of connecting portions 13321, for example, at least two connecting holes, when one end of the cable-stayed composite insulator 1210 is connected with the reinforcement 1332, according to actual requirements, a suitable connecting portion 13321 may be selected from the plurality of connecting portions 13321, and then the cable-stayed composite insulator 1210 is connected with the suitable connecting portion 13321, where structures of the plurality of connecting portions 13321 may be the same or different, and are not limited herein. In one embodiment, the reinforcement 1332 is integrally formed with the first connecting beam 1310. In other embodiments, the reinforcement 1332 and the first connecting beam 1310 may be connected by welding, bolts, or the like, and will not be described herein.

In an application scenario, with reference to fig. 2, 3 and 4, the number of the reinforcing plates 1331 is two, and the two reinforcing members 1332 are respectively interposed between the end portions of the two reinforcing plates 1331. In other application scenarios, the number of the reinforcing plates 1331 may also be multiple, and two reinforcing members 1332 are respectively interposed between the end portions of any two of the reinforcing plates 1331.

In one embodiment, as shown in fig. 4, the reinforcing plate 1331 is an angle steel, and the two angle steels are arranged back to back; in another embodiment, the reinforcing plate 1331 may also be a flat plate, which is not limited herein.

In another application scenario, as shown in fig. 5, there is one reinforcing plate 1331, and the reinforcing plate 1331 is fixed across two reinforcing members 1332 at the same time, where it should be noted that, in fig. 5, only the reinforcing member 1332 at one end of the reinforcing plate 1331 is shown.

In an embodiment, as shown in fig. 5, the reinforcing plate 1331 is a straight plate with a T-shaped cross section, and this arrangement can make the structure of the reinforcing plate 1331 more stable and the strength higher; in another embodiment, the reinforcing plate 1331 may also be a flat plate, which is not limited herein.

In summary, the present application is not limited to the specific structure of the stiffening cross-beam 1330.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of the transmission tower 2000 of the present application, wherein the transmission tower 2000 includes a tower body 2100 and a composite cross arm 2200.

The tower 2100 is a truss structure tower that is common in the art and is not described herein, and the tower 2100 has two opposite sides, and the two sides are both provided with the first connecting beams 2310. In an application scenario, as shown in fig. 6, the first connecting beams 2310 disposed at both sides of the tower body 2100 are symmetrical with respect to the tower body 2100, but the present application is not limited thereto, and in an application scenario thereof, the first connecting beams 2310 disposed at both sides of the tower body 2100 may not be symmetrical with respect to the tower body 2100.

Meanwhile, the tower body 2100 is further provided with a reinforcing beam 2330 bridged over the first connecting beams 2310 at both sides, and the composite cross arm 2200 is connected with the reinforcing beam 2330.

Specifically, only one side of tower body 2100 may be provided with composite cross arm 2200, or both sides of tower body 2100 may be provided with composite cross arms 2200, and when both sides of tower body 2100 are provided with composite cross arms 2200, composite cross arms 2200 on both sides may be symmetrical with respect to tower body 2100, or may not be symmetrical with respect to tower body 2100. In the drawings, composite cross arms 2200 are arranged on both sides of a tower body 2100, and the composite cross arms 2200 on both sides are illustrated symmetrically with respect to the tower body 2100.

In the embodiment, on one hand, the composite cross arm 2200 is connected with the tower 2100, because the composite cross arm 2200 has good insulating property, when a transmission line needs to be hung subsequently, a wire-hanging fitting can be installed at the end of the composite cross arm 2200, and then the transmission line is hung by the wire-hanging fitting, that is, compared with the prior art, the transmission line is hung by the wire-hanging fitting instead of a suspension insulator, and because the length of the wire-hanging fitting is much smaller than that of the suspension insulator, the power transmission tower 2000 in the embodiment can increase the distance of the transmission line to the ground, effectively ensure the safety of the surrounding electrical environment, and in addition, the good insulating property of the composite cross arm 2200 can eliminate the potential safety hazard of the power transmission line and the tower 2100 caused by insufficient electrical distance between the transmission line and the tower 2100 due to too large wind deflection, and on the other hand, the reinforcing beam 2330 is arranged on the first connecting beam 2310 which is arranged on both sides of the tower 2100, and can bear the stress of the composite cross arm 2200 and the tower 2100, the connection strength between the composite cross arm 2200 and the tower body 2100 and the mechanical strength of the whole composite cross arm 2200 are ensured.

Referring to fig. 6, 7 and 8, the reinforcement beam 2330 includes a reinforcement plate 2331 and two reinforcements 2332 respectively disposed at both ends of the reinforcement plate 2331, wherein the two reinforcements 2332 are respectively disposed on the two first connection beams 2310, and the composite cross arm 2200 is connected to the reinforcements 2332.

Specifically, since the reinforcing member 2332 connected to the composite cross arm 2200 is connected to both the reinforcing plate 2331 and the first connecting beam 2310, the strength of connection to the tower body 2100 is high and the composite cross arm 2200 can be further increased since the composite cross arm is not easily separated from the tower body 2100.

In other embodiments, the stiffener 2332 may not be disposed over the first connecting beam 2310, and is not limited thereto.

As shown in fig. 7, in an application scenario, the reinforcement 2332 is a plate, and in order to facilitate connection with the cable-stayed composite insulator 2210, one end of the reinforcement 2332 protrudes from the first connecting beam 2310 in a direction away from the tower 2100, and a plurality of connecting portions 23321, such as at least two connecting holes, are disposed on the reinforcement 2332, and when the composite cross arm 2200 is connected with the reinforcement 2332, an appropriate connecting portion 23321 may be selected from the plurality of connecting portions 23321 according to actual requirements, and then the composite cross arm 2200 is connected with the appropriate connecting portion 23321, where the structures of the plurality of connecting portions 23321 may be the same or different, and are not limited herein. In one embodiment, the stiffener 2332 is integrally formed with the first connecting beam 2310. In other embodiments, the reinforcement 2332 and the first connecting beam 2310 can be connected by welding, bolting, etc., and will not be described in detail herein.

In an application scenario, referring to fig. 6, 7 and 8, the number of the reinforcing plates 2331 is two, and the two reinforcing members 2332 are respectively sandwiched between the end portions of the two reinforcing plates 2331. In other application scenarios, the number of the reinforcing plates 2331 may be multiple, and two reinforcing members 2332 are respectively sandwiched between the end portions of any two reinforcing plates 2331.

In one embodiment, as shown in fig. 8, the stiffener 2331 is an angle steel with two angle steels arranged back-to-back; in another embodiment, the stiffener 2331 may also be a flat plate, which is not limited herein.

In another application scenario, as shown in fig. 9, the number of the reinforcing plates 2331 is one, and the reinforcing plates 2331 are fixed to span over two reinforcing members 2332 at the same time, wherein it should be noted that only the reinforcing member 2332 at one end of the reinforcing plate 2331 is shown in fig. 9.

In an embodiment, as shown in fig. 9, the reinforcing plate 2331 is a straight plate with a T-shaped cross section, which can make the structure of the reinforcing plate 2331 more stable and stronger; in another embodiment, the stiffener 2331 may also be a flat plate, which is not limited herein.

In other embodiments, a plurality of reinforcing beams 2330 may be provided to accommodate various combination structures of the composite cross arm 2200 including the post composite insulator 2220 and the cable-stayed composite insulator 2210, the plurality of reinforcing beams 2330 are fixed across two first connecting beams 2310 symmetrical to the tower 2100, and the plurality of reinforcing beams 2330 may be arranged side by side in parallel or may intersect with each other.

In summary, the present application is not limited to the specific structure of the reinforcement beam 2330.

Continuing to refer to fig. 6, composite cross arm 2200 includes cable-stayed composite insulators 2210 and post composite insulators 2220.

One end of the post composite insulator 2220 is connected to the second connecting beam 2320 on the tower body 2100, wherein the second connecting beam 2320 is arranged at the same side as the first connecting beam 2310 and at a certain distance; one end of the cable-stayed composite insulator 2210 is connected with the reinforcing beam 2330, and the other end is connected with the other end of the post composite insulator 2220 far away from the tower body 2100, so that a stable bracket structure with an included angle is formed between the post composite insulator 2220 and the cable-stayed composite insulator 2210.

Specifically, a stable bracket structure with an included angle is formed between the post composite insulator 2220 and the cable-stayed composite insulator 2210, so that on one hand, accidents such as deformation or breakage of the composite cross arm 2200 in extreme typhoon weather can be avoided, on the other hand, windage yaw flashover accidents caused by the fact that the power transmission line is close to the tower body 2100 due to wind swing can be avoided, and the power utilization stability is ensured.

In one application, as shown in FIG. 6, a composite cross-arm 2200 is attached to the middle of the cross-beam assembly 2300. Specifically, the cable-stayed composite insulator 2210 is connected to the middle of the first connecting beam 2310, and the post composite insulator 2220 is connected to the middle of the second connecting beam 2320, so that the tower 2100 is stressed uniformly.

In other embodiments, composite cross-arm 2200 may be attached elsewhere on cross-beam assembly 2300, such as near one side of tower 2100. In one embodiment, two sets of composite cross arms 2200 are attached to one beam assembly 2300, and the two sets of composite cross arms 2200 are symmetrically disposed about a centerline of the beam assembly 2300. Specifically, two diagonal composite insulators 2210 of the two sets of composite cross arms 2200 are symmetrically connected to both sides of the middle portion of the first connecting cross beam 2310, and two post composite insulators 2220 are symmetrically connected to both sides of the middle portion of the second connecting cross beam 2320.

In other embodiments, the composite cross arm 2200 may also adopt other forms of structures, for example, the composite cross arm 2200 includes two post composite insulators 2220 and two cable-stayed composite insulators 2210, one end of each of the two post composite insulators 2220 is connected to the tower 2100, and the other ends of the two post composite insulators 2220 are connected to each other as a wire hanging point, so that the two post insulators 1220 form a V-shaped structure with the wire hanging point as a vertex; one end of each of the two cable-stayed composite insulators 2210 is fixedly connected to the tower body 2100, and is located above the end where the two post composite insulators 2220 and the tower body 2100 are fixed, and the other end of each of the two cable-stayed composite insulators 2210 is connected to a cable-hanging point, so that the two cable-stayed composite insulators 2210 form a V-shaped structure with the cable-hanging point as a vertex. Of course, the composite cross arm 2200 may also include two post composite insulators 2220 and one cable-stayed composite insulator 2210, or include a combination of one post composite insulator 2220 and three cable-stayed composite insulators 2210, and other forms, and the specific connection manner is not limited as long as the power transmission line can be supported and hung.

Referring to fig. 6 and 10, the transmission tower 2000 further includes a first connection assembly 2400 for connecting the cable-stayed composite insulator 2210 with the reinforcing beam 2330, wherein the length of the first connection assembly 2400 is adjustable to adjust a distance between the cable-stayed composite insulator 2210 and the reinforcing beam 2330.

Specifically, the length of the first connection assembly 2400 is adjustable, so that the transmission tower 2000 is flexible and changeable, and different application scenarios are adapted.

In an application scenario, referring to fig. 6 and 10, the first connection assembly 2400 includes a first adjusting plate 2410 and a second adjusting plate 2420.

One end of the first adjusting plate 2410 is connected to the cable-stayed composite insulator 2210, and one end of the second adjusting plate 2420 is connected to the reinforcing cross beam 2330, wherein the first adjusting plate 2410 is fixed to the second adjusting plate 2420 in a position-adjustable manner.

Specifically, the length of the first connection assembly 2400 is adjustable by adjusting the fixed connection position of the first adjustment plate 2410 and the second adjustment plate 2420.

As shown in fig. 10, a plurality of through holes 2411 are formed on the first adjusting plate 2410 and the second adjusting plate 2420, and when the length of the first connection assembly 2400 needs to be adjusted, fasteners such as screws are inserted into the through holes 2411 formed on the first adjusting plate 2410 and the second adjusting plate 2420, so as to adjust the fixed connection position of the first adjusting plate 2410 and the second adjusting plate 2420.

In an embodiment, as shown in fig. 10, in order to ensure the connection strength between the first adjustment plate 2410 and the second adjustment plate 2420, the number of the second adjustment plates 2420 is two, the end of the first adjustment plate 2410 not connected to the cable-stayed composite insulator 2210 is sandwiched between the two second adjustment plates 2420, the end of the two second adjustment plates 2420 not connected to the first adjustment plate 2410 is connected to the reinforcing cross beam 2330 through a U-shaped fitting 2430 (for example, connected to the reinforcing member 2332 in the reinforcing cross beam 2330), and of course, the two second adjustment plates 2420 may also be directly connected to the reinforcing cross beam 2330, which is not limited herein.

Referring to fig. 6, 11 and 12, a flange 2230 is provided at an end of the post composite insulator 2220 connected to the second connecting beam 2320, and the flange 2230 includes a flange barrel 2231 and a flange plate 2232.

The flange barrel 2231 is disposed around the pillar composite insulator 2220, the number of the flange plates 2232 is at least two, for example, two, four, or more, the at least two flange plates 2232 are disposed at intervals along the circumferential direction of the flange barrel 2231 and connected to the flange barrel 2231, wherein the at least two flange plates 2232 are configured to connect the pillar composite insulator 2220 and the second connecting cross-beam 2320.

Specifically, the provision of at least two flange plates 2232 connecting the post composite insulator 2220 and the second connecting cross member 2320 can ensure the connection strength between the post composite insulator 2220 and the second connecting cross member 2320.

With continued reference to fig. 11 and 12, the transmission tower 2000 further includes a second connection assembly 2500 for connecting the second connection beam 2320 with the flange 2230, the second connection assembly 2500 includes a plurality of sets of clamping plates 2510, and the second connection beam 2320 includes a beam body 2321 and a connection plate 2322 disposed on the beam body 2321.

Meanwhile, the flange plates 2232 on the post composite insulators 2220 are respectively and fixedly clamped at one end of the plurality of sets of clamping plates 2510, and the connecting plates 2322 of the second connecting cross beam 2320 are respectively and fixedly clamped at the other end of the plurality of sets of clamping plates 2510, so that the post composite insulators 2220 and the second connecting cross beam 2320 are connected.

Specifically, the second connecting beam 2320 and the flange 2230 are connected by the plurality of sets of clamping plates 2510, so that the connection strength between the post composite insulator 2220 and the second connecting beam 2320 can be further ensured.

In one application scenario, as shown in fig. 12, the number of the flange plates 2232 is four, and two adjacent flange plates 2232 are vertically disposed, and accordingly, the number of the clamping plates 2510 is four.

In an application scenario, as shown in fig. 12, the connecting plate 2322 is vertically disposed on the beam body 2321.

In an application scenario, as shown in fig. 12, in order to ensure the strength of the second connecting beam 2320, a reinforcing rib 2323 is further disposed between the beam body 2321 and the connecting plate 2322.

With continued reference to fig. 12, the flange plate 2232, the clamping plate 2510 and the connecting plate 2322 are respectively provided with a matching locking hole 2511 to connect and fix the post composite insulator 2220, the second connecting assembly 2500 and the second connecting beam 2320 together by a locking member passing through the locking hole 2511.

With reference to fig. 6 and 13, the other end of the post composite insulator 2220 away from the tower 2100 is connected to a flat-leg fitting 2221, the other end of the cable-stayed composite insulator 2210 is connected to a slot fitting 2211, and the flat-leg fitting 2221 is hinged to the slot fitting 2211 to movably connect the post composite insulator 2220 and the cable-stayed composite insulator 2210.

Specifically, the post composite insulator 2220 and the cable-stayed composite insulator 2210 are hinged through the flat-pin fitting 2221 and the clamping groove fitting 2211, so that the problem of installation dislocation caused by in-plane and out-of-plane angle deviation in the installation process can be effectively solved, the impact of a windage yaw transmission line on the cable-stayed composite insulator 2210 can be effectively buffered, and the cable-stayed composite insulator 2210 is protected.

In other embodiments, the other end of the post composite insulator 2220 away from the tower 2100 may be connected to a slot fitting 2211, and the other end of the cable-stayed composite insulator 2210 may be connected to a flat-leg fitting 2221, which is not limited herein.

It should be noted that the power transmission tower 2000 in the present embodiment is a power transmission tower modified by the method for modifying a power transmission tower in any one of the above embodiments, that is, the power transmission tower 2000 in the present embodiment has the same structure as the power transmission tower in the above embodiments.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. A transmission tower, comprising:

the tower body is provided with two sides which are arranged in a back-to-back manner, the two sides are both provided with first connecting beams, and meanwhile, the tower body is also provided with a reinforcing beam which is bridged on the first connecting beams on the two sides;

and the composite cross arm is connected with the reinforcing cross beam.

2. The transmission tower according to claim 1, wherein the reinforcing beam comprises a reinforcing plate and two reinforcing members disposed at both ends of the reinforcing plate, respectively, the two reinforcing members are disposed on the first connecting beams at both sides, respectively, and the composite cross arm is connected to the reinforcing members.

3. The transmission tower according to claim 2, wherein the number of the reinforcing plates is two, and the two reinforcing members are respectively sandwiched between end portions of the two reinforcing plates.

4. The transmission tower according to claim 2, wherein the number of the reinforcing plates is one, and the reinforcing plates are fixed across two of the reinforcing members.

5. The transmission tower of claim 1, wherein the composite cross arm comprises:

one end of the post composite insulator is connected with a second connecting cross beam on the tower body, wherein the second connecting cross beam is arranged at the same side of the first connecting cross beam at a certain distance;

and one end of the cable-stayed composite insulator is connected with the reinforcing cross beam, and the other end of the cable-stayed composite insulator is connected with the other end of the tower body, which is far away from the post composite insulator, so that a stable bracket structure with an included angle is formed between the post composite insulator and the cable-stayed composite insulator.

6. The transmission tower according to claim 5, further comprising:

the first connecting assembly is connected with the cable-stayed composite insulator and the reinforcing cross beam, wherein the length of the first connecting assembly is adjustable so as to adjust the distance between the cable-stayed composite insulator and the reinforcing cross beam.

7. The transmission tower of claim 6, wherein the first connection assembly comprises:

one end of the first adjusting plate is connected with the cable-stayed composite insulator;

and one end of the second adjusting plate is connected with the reinforcing cross beam, wherein the first adjusting plate is fixed on the second adjusting plate in an adjustable position.

8. The transmission tower according to claim 5, wherein the end of the post composite insulator connected to the second connecting beam is provided with a flange, and the flange comprises:

the flange cylinder is sleeved on the periphery of the pillar composite insulator;

at least two flange plates are arranged along the circumferential direction of the flange barrel at intervals and are connected with the flange barrel, wherein at least two flange plates are used for connecting the post composite insulator with the second connecting beam.

9. The transmission tower according to claim 8, further comprising:

the second connecting assembly is used for connecting the second connecting beam with the flange and comprises a plurality of groups of clamping plates;

the second connecting beam comprises a beam body and a connecting plate arranged on the beam body;

the flange plates on the post composite insulator are respectively and fixedly clamped at one ends of the clamping plates, and the connecting plates of the second connecting beam are respectively and fixedly clamped at the other ends of the clamping plates, so that the post composite insulator is connected with the second connecting beam.

10. The transmission tower according to claim 9, wherein the flange plate, the clamping plate, and the connecting plate are each provided with a matching locking hole for securing the post composite insulator, the second connecting member, and the second connecting beam together with a locking member passing through the locking holes.

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