Power transmission tower

Abstract

The utility model provides a power transmission tower which comprises a tower body and a composite cross arm arranged on the tower body, the composite cross arm comprises a cable-stayed insulator and a post insulator, the first end of the post insulator is connected with the first end of the cable-stayed insulator, and the second end of the post insulator and the second end of the cable-stayed insulator are both connected with the tower body. The cable-stayed insulator is arranged on the tower body and located above the supporting column insulator, the second end of the cable-stayed insulator is sleeved with an end hardware fitting, a connecting piece is arranged on the tower body, the end hardware fitting is connected with the tower body through the connecting piece, and the connecting piece comprises at least one first fixing plate fixedly connected with the tower body and at least one second fixing plate fixedly connected with the supporting column insulator. And the second fixing plate is fixedly connected with the end fitting, and a certain included angle is formed between the second fixing plate and the at least one first fixing plate. According to the design, the connecting structure of the cable-stayed insulator and the tower body can be simplified, and the manufacturing and mounting cost can be reduced under the condition that the safety performance is guaranteed.

Description

Technical Field

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

[0002] At present, the cable-stayed insulators of composite crossarms are generally connected to the tower body through a hardware string, but the hardware string has problems such as complex structure, high cost, and inconvenient installation. Moreover, as long as one of the hardware fails, the cable-stayed insulator will fall off, which poses certain safety hazards. Utility Model Content

[0003] In view of this, the present application provides a transmission tower that can simplify the connection structure between the cable-stayed insulator and the tower body, and can reduce the manufacturing and installation costs while ensuring safety performance.

[0004] In order to solve the above problems, the present application provides a transmission tower, which includes a tower body and a composite crossarm arranged on the tower body, the composite crossarm includes a diagonal insulator and a support insulator, the first end of the support insulator is connected to the first end of the diagonal insulator, the second end of the support insulator and the second end of the diagonal insulator are both connected to the tower body, and the diagonal insulator is located above the support insulator on the tower body, the second end of the diagonal insulator is sleeved with an end fitting, the tower body is provided with a connecting piece, the end fitting of the diagonal insulator is connected to the tower body through the connecting piece, and the connecting piece includes: at least one first fixing plate, which is fixedly connected to the tower body; a second fixing plate, which is fixedly connected to the end fitting, and the second fixing plate is arranged at a certain angle to the at least one first fixing plate.

[0005] The present application connects the composite cross arm to the tower body through a connecting piece, which can ensure the connection strength between the composite cross arm and the tower body on the one hand, and simplify the connection structure and reduce costs on the other hand; the second fixing plate is arranged at a certain angle to the first fixing plate, which can ensure a stable connection between the connecting piece and the tower body.

[0006] According to some embodiments of the present application, the oblique-stayed insulator also includes a core rod, and the end hardware includes a sleeve, an extension portion, and two clamping plates arranged at the end of the extension portion. The sleeve is sleeved on the second end of the oblique-stayed insulator and fixed to the end of the core rod, and the two clamping plates are arranged at intervals to form a groove between the two clamping plates.

[0007] The above arrangement can enhance the connection strength between the end fittings and the inclined-stayed insulator. At the same time, the extension part can conveniently set its own length according to actual needs in production to adjust the length of the end fittings, so as to adjust the distance from the inclined-stayed insulator to the tower body according to actual needs.

[0008] According to some embodiments of the present application, the sleeve is a hollow tubular structure, the extension portion is a solid cylinder, and the sleeve and the extension portion are coaxially arranged.

[0009] The above arrangement can further ensure the safety performance of the end fittings.

[0010] According to some embodiments of the present application, a first through hole is provided on the clamping plate, and the end fitting is connected to the second fixing plate through the first through hole.

[0011] The above arrangement can ensure the installation of the end fittings and connectors on the one hand, and can also improve the convenience of installation and maintenance on the other hand.

[0012] According to some embodiments of the present application, the second fixing plate is provided with a plurality of second through holes, and the plurality of second through holes are distributed along the height direction of the tower body. The second fixing plate selects one of the plurality of second through holes to cooperate with the first through hole to achieve connection with the end fitting.

[0013] The arrangement of a plurality of second through holes can adjust the distance between the insulator and the tower body and the angle of connection with the tower body according to actual engineering needs, making the installation and adjustment of the composite cross arm flexible and convenient.

[0014] According to some embodiments of the present application, an edge of one side of the second fixing plate close to the end fitting is provided with recesses and protrusions distributed at intervals. After the protrusion protrudes outward, a recess is formed between two adjacent protrusions, and the outer edge of the protrusion is in an arc shape, so that an edge of one side of the second fixing plate close to the end fitting is wavy, and the second through hole is close to the edge of the second fixing plate and is located on the protrusion.

[0015] The above arrangement can provide a certain rotation space for the end fittings, thereby shortening the length of the end fittings and avoiding mutual interference between the end fittings and the connecting piece.

[0016] According to some embodiments of the present application, the number of the first fixing plates is two, and the two first fixing plates are welded together with the second fixing plate.

[0017] The above arrangement can improve the safety performance of the connector.

[0018] According to some embodiments of the present application, the two first fixing plates and the second fixing plates are circumferentially distributed around the mutual connection.

[0019] The above arrangement can make the force on the connecting piece more uniform.

[0020] According to some embodiments of the present application, a plurality of first mounting holes are provided on the first fixing plate.

[0021] The above arrangement can facilitate the installation of the connecting parts on the tower body, providing convenience for construction and maintenance.

[0022] According to some embodiments of the present application, a second mounting hole corresponding to the first mounting hole is provided on the tower body, and the first fixing plate is connected to the tower body through the cooperation between the first mounting hole and the second mounting hole.

[0023] The above arrangement can ensure the fixed connection between the connecting piece and the tower body on the one hand, and can also improve the convenience of installation and maintenance on the other hand.

[0024] Beneficial effects: The present application connects the composite cross arm to the tower body through a connector, thereby simplifying the connection structure and reducing costs while ensuring safety performance.

[0025] At the same time, the oblique-stayed insulator is connected to the connecting piece by sleeve-mounted end fittings, and the end fittings are provided with extension parts, so that the length of the oblique-stayed insulator can be adjusted to meet different engineering requirements, thereby expanding the scope of application and further reducing costs.

[0026] In addition, the connector provided in the present application can adjust the distance between the diagonal insulator and the tower body and the angle of connection with the tower body, making the installation and adjustment of the composite crossarm flexible and convenient.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0029] Figure 1 It is a structural schematic diagram of an implementation method of a transmission tower of the present application;

[0030] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle oblique insulator;

[0031] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle end fitting;

[0032] Figure 4 yes Figure 1 Schematic diagram of the structure of the connecting parts. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1 The present application provides a transmission tower 10, which includes a tower body 100 and a composite cross arm 200 disposed on the tower body 100, wherein the composite cross arm 200 includes a diagonal insulator 210 and a support insulator 220, wherein the first end of the support insulator 220 is connected to the first end of the diagonal insulator 210, and the second end of the support insulator 220 and the second end of the diagonal insulator 210 are both connected to the tower body 100, and the diagonal insulator 210 is located above the support insulator 220 on the tower body 100. A flange is sleeved on the second end of the support insulator 220, and an end fitting 230 is sleeved on the second end of the diagonal insulator 210. A connecting piece 240 is disposed on the tower body 100, and the flange of the support insulator 220 is connected to the tower body 100 through the connecting piece 240, and the end fitting 230 of the diagonal insulator 210 is connected to the tower body 100 through the connecting piece 240.

[0035] Specifically, the tower body 100 may be a transmission tower structure of a common structure such as a lattice iron tower, a pole body or a composite pole tower. A composite cross arm 200 (such as Figure 1 As shown), composite cross arms 200 may also be provided on multiple sides of the tower body 100. Among them, one side of the tower body 100 may be provided with a composite cross arm 200 (as shown in FIG. Figure 1 As shown), a plurality of composite cross arms 200 may also be arranged at intervals along the vertical direction.

[0036] In one application scenario, the number of the inclined insulators 210 is two, and the number of the post insulators 220 is two (eg Figure 1 In another application scenario, the number of the inclined insulator 210 is one, and the number of the post insulator 220 is two; in another application scenario, the number of the inclined insulator 210 is one, and the number of the post insulator 220 is also one. In summary, the present application does not limit the number of the inclined insulator 210 and the post insulator 220.

[0037] See also Figure 2The oblique-stayed insulator 210 includes a core rod 211, an shed 212 covering the outside of the core rod 211, and an end fitting 230 fixed to the end of the core rod 211. The core rod 211 is made of epoxy resin impregnated glass fiber pultruded, and its cross section is circular. The shed 212 is made of high-temperature vulcanized silicone rubber and is integrally injection-molded and covered on the outside of the core rod 211. Of course, the core rod 211 can also be made of other methods such as compression molding, winding molding, etc., and can also be made of other materials such as vinyl ester resin impregnated glass fiber, and its cross section can also be other shapes such as square or polygonal. The shed 212 can also be formed first and then put on the core rod 211, and can also be made of other insulating materials such as room temperature vulcanized silicone rubber or glass.

[0038] See also Figure 2 and Figure 3 The end fitting 230 includes a sleeve 231, an extension 232, and two clamps 233 arranged at the end of the extension 232. The sleeve 231 is a hollow tubular structure, and its cross-sectional shape matches the cross-sectional shape of the core rod 211, that is, the inner diameter of the sleeve 231 matches the outer diameter of the core rod 211, so that the sleeve 231 is sleeved on the outer peripheral surface of the end of the core rod 211, wherein the sleeve 231 and the end of the core rod 211 are fixed by crimping, so that the sleeve 231 and the core rod 211 are sealed and fastened. Among them, the length of the sleeve 231 is designed according to the crimping length of the sleeve 231 and the core rod 211, ensuring that the end of the core rod 211 abuts the bottom of the sleeve 231, preventing the core rod 211 and the sleeve 231 from forming a gap in their axial direction and reducing the connection strength between the sleeve 231 and the core rod 211.

[0039] The extension part 232 is connected to the end of the sleeve 231 away from the core rod 211, and the extension part 232 is coaxially arranged with the sleeve 231. The extension part 232 is used to increase the overall length of the end fitting 230. The length of the extension part 232 is designed according to actual use requirements, as long as it can meet the overall length requirements of the inclined insulator 210. Among them, the extension part 232 is set as a solid cylinder to increase the connection strength of the end fitting 230 and prevent the end fitting 230 from breaking under long-term stress.

[0040] The two clamping plates 233 are arranged at the end of the extension part 232 away from the sleeve 231, and the two clamping plates 233 are arranged at intervals, so that a groove 235 is formed between the two clamping plates 233. Specifically, the end of the extension part 232 away from the sleeve 231 is fixedly connected to the bottom plate 234, and the bottom plate 234 has a rectangular structure. The two clamping plates 233 are respectively fixed to two opposite sides of the bottom plate 234, so that the two clamping plates 233 are arranged at intervals to form a groove 235.

[0041] The two clamping plates 233, the extension part 232 and the sleeve 231 are integrally formed to form the end fitting 230, and then the core rod 211 is inserted into the sleeve 231 and crimped. The sleeve 231 and the extension part 232 are coaxially arranged to increase the safety performance of the end fitting 230. At the same time, the extension part 232 can be conveniently set according to actual needs in production to adjust the length of the end fitting 230, and then the distance from the first end of the inclined insulator 210 to the tower body 100 can be adjusted according to actual engineering needs.

[0042] In order to prevent the end fitting 230 from being corroded by water vapor, etc., the surface of the end fitting 230 is hot-dip galvanized, and its internal material can be cast aluminum, cast iron or alloy steel, etc., which is not limited here.

[0043] Continue reading Figure 3 , the two clamping plates 233 are respectively provided with corresponding first through holes 2331 for connecting with the connecting piece 240. In this embodiment, the two clamping plates 233 are arranged in parallel, and the outer edges of the clamping plates 233 are in an arc shape to avoid interference with other components, facilitate installation, and avoid the risk of corona generated by the end fitting 230 due to sudden change in curvature. Of course, the two clamping plates 233 can also be arranged not in parallel but at a certain angle, and the outer edges of the clamping plates 233 can also be in other shapes such as square and triangle, which is not limited by the present application.

[0044] Combination Figure 4 The connecting member 240 includes a first fixing plate 241 and a second fixing plate 242. The first fixing plate 241 is used to be fixedly connected to the tower body 100, and the second fixing plate 242 is used to be fixedly connected to the end fitting 230 or the flange. The second fixing plate 242 and the first fixing plate 241 are arranged at a certain angle, that is, the plate surface of the first fixing plate 241 and the plate surface of the second fixing plate 242 are not arranged in parallel, which can facilitate the cross arm 200 and the tower body 100 to adjust their connection angle according to different situations.

[0045] The first fixing plate 241 is a rectangular plate-shaped member, and a plurality of first mounting holes 2411 are provided on the first fixing plate 241. A plurality of second mounting holes (not shown) are also provided at corresponding positions of the angle steel of the tower body 100. The positions of the second mounting holes and the first mounting holes 2411 correspond to each other, and the number of the second mounting holes and the first mounting holes 2411 are the same. The first fixing plate 241 is fixedly connected to the tower body 100 by fasteners (not shown) passing through the first mounting holes 2411 and the second mounting holes at the same time. The first mounting holes 2411 can be designed in size, direction and number according to the transmission tower 10 with different angle steel structures, and the present application does not impose any restrictions on this, as long as the first mounting holes 2411 can meet the force balance and enable the connector 240 to be connected to the tower body 100.

[0046] The second fixing plate 242 is a plate-shaped member. The second fixing plate 242 is provided with recesses and protrusions at intervals on one side edge near the end fitting 230. After the protrusions protrude outward, a recess is formed between two adjacent protrusions. The outer edge of the protrusion is in an arc shape, so that the side edge of the second fixing plate 242 near the end fitting 230 is wavy. The second fixing plate 242 is provided with a plurality of second through holes 2421. The plurality of second through holes 2421 are arranged at the edge of the second fixing plate 242 and on the plurality of protrusions. The plurality of second through holes 2421 are distributed along the height direction of the tower body 100. The second fixing plate 242 is inserted into the groove 235, so that the first through holes 2331 on the two clamping plates 233 of the end fitting 230 are used to match with the second through holes 2421 on the connecting member 240 and then fastened with a locking member such as a bolt. The end fitting 230 is connected to one of the plurality of second through holes 2421, so that the distance and relative angle between the inclined insulator 210 and the tower body 100 can be adjusted. Specifically, the second through hole 2421 is located on the protrusion of the edge of the second fixing plate 242 and is arranged directly opposite the center of the outer edge of the protrusion. A plurality of protrusions and recesses are arranged at intervals so that the edge of one side of the second fixing plate 242 close to the end fitting 230 is wavy. On the one hand, there is no tip on the wavy edge, which can effectively avoid the tip discharge phenomenon. On the other hand, the second through hole 2421 is located on the protrusion, and the adjacent recess can give the end fitting 230 connected to the second through hole 2421 a larger rotation space, avoiding the mutual interference between the end fitting 230 and the connecting piece 240. On the contrary, if the second through hole 2421 is not located on the protrusion, since the end fitting 230 will be tilted at a certain angle during installation, in order to avoid contact and compression between the end fitting 230 and the second fixing plate 242 after the two are connected, the clamping plate 233 of the end fitting 230 will be designed to be longer. Therefore, in the present application, the edge of the second fixing plate 242 is wavy, that is, the protrusions and recesses are spaced apart, which can provide a certain rotation space for the end fitting 230, shorten the length of the end fitting 230, and avoid mutual interference between the end fitting 230 and the connector 240, thereby reducing costs and facilitating installation.

[0047] In an application scenario, such as Figure 1As shown, the connecting member 240 includes two first fixing plates 241 and a first fixing plate 241, and the two first fixing plates 241 and the second fixing plate 242 are connected together by welding, wherein one of the first fixing plates 241 is arranged between the obtuse angle formed by the other first fixing plate 241 and the second fixing plate 242 so that the two first fixing plates 241 and the second fixing plates 242 are circumferentially distributed around the mutual connection. The arrangement of the two first fixing plates 241 can strengthen the connection strength between the first fixing plates 241 and the second fixing plates 242, and avoid the connection strength between the first fixing plates 241 and the second fixing plates 242 from being insufficient and breaking. At the same time, the two first fixing plates 241 and the second fixing plates 242 are circumferentially distributed around the mutual connection, which can also strengthen the connection between the connecting member 240 and the tower body 100, making the connection more stable. Of course, the number of the first fixing plates 241 can also be set to one (such as Figure 4 As shown), or other numbers, which are set according to actual conditions. In short, the present application does not limit the number of the first fixing plates 241.

[0048] In order to prevent the connector 240 from being corroded by water vapor, the surface of the connector 240 is treated with hot-dip galvanizing, and its internal material can be cast aluminum, cast iron, or alloy steel, etc., which is not limited here. The first fixing plate 241 and the second fixing plate 242 can be formed separately and then welded together, or they can be formed in one piece, as long as the connector 240 can be formed and meet the connection strength with the tower body 100 and the inclined insulator 210 and the post insulator 220.

[0049] A second mounting hole (not shown) is provided on the tower body 100 corresponding to the first mounting hole 2411 on the first fixing plate 241, and the first fixing plate 241 and the tower body 100 are fixedly connected by inserting mutually matching bolts, nuts and other fasteners through the first mounting hole 2411 and the second mounting hole, that is, the first fixing plate 241 is connected to the tower body 100 through the matching of the first mounting hole 2411 and the second mounting hole. The above arrangement can ensure the installation of the connecting member 240 and the tower body 100 on the one hand, and can also improve the convenience of installation and maintenance on the other hand.

[0050] The second end of the post insulator 220 is sleeved with a flange, the tower body 100 is provided with a connector 240, and the end of the flange is provided with a connecting plate, which is connected to the tower body 100 through the connector 240. In one embodiment, the axis of the post insulator 220 is tilted upward relative to the horizontal direction. Therefore, in order to facilitate the adjustment of the distance 100 between the post insulator and the tower body and the angle of connection with the tower body 100, the connector 240 is used as follows: Figure 4The structure shown, through the wavy edge of the second fixed plate 242, that is, the protrusions and recesses are distributed at intervals, can provide a certain rotation space for flange installation, while shortening the length of the connecting plate on the flange and avoiding mutual interference between the flange and the connecting member 240. The details are not repeated here.

[0051] In another embodiment, see Figure 1 The axis of the support insulator 240 may also be set horizontally. In this case, the end edge of the connector 240 connected to the flange end may not be set to a wavy shape, but may be set to a rectangular shape to simplify the process and reduce costs.

[0052] In summary, the present application optimizes the design of the composite cross-arm connecting fittings so that the cable-stayed insulator no longer needs to be connected to the transmission tower through a fitting string, but can be directly connected to the tower body through end fittings and connectors, thereby simplifying the connection structure and reducing costs; at the same time, the composite cross-arm is connected to the tower body through end fittings / flanges and connectors, and the end fittings are provided with an extension portion to adjust the length of the cable-stayed insulator, thereby expanding the scope of application, and the connector can adjust the distance from the insulator to the tower body and the angle of connection with the tower body, making the installation and adjustment of the composite cross-arm more flexible and convenient.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A transmission tower, characterized in that: The transmission tower comprises a tower body and a composite cross arm arranged on the tower body, the composite cross arm comprises a diagonal insulator and a support insulator, the first end of the support insulator is connected to the first end of the diagonal insulator, the second end of the support insulator and the second end of the diagonal insulator are both connected to the tower body, and the diagonal insulator is located above the support insulator on the tower body, the second end of the diagonal insulator is sleeved with an end fitting, the tower body is provided with a connecting piece, the end fitting is connected to the tower body through the connecting piece, and the connecting piece comprises: At least one first fixing plate fixedly connected to the tower body; The second fixing plate is fixedly connected to the end fitting, and the second fixing plate is arranged at a certain angle to at least one of the first fixing plates.

2. The transmission tower according to claim 1, characterized in that: The oblique-pull insulator also includes a core rod, and the end hardware includes a sleeve, an extension portion and two clamping plates arranged at the end of the extension portion. The sleeve is sleeved on the second end of the oblique-pull insulator and fixed to the end of the core rod. The two clamping plates are arranged at intervals to form a groove between the two clamping plates.

3. The transmission tower according to claim 2, characterized in that: The sleeve is a hollow tubular structure, the extension portion is a solid cylinder, and the sleeve and the extension portion are coaxially arranged.

4. The transmission tower according to claim 2, characterized in that: The clamping plate is provided with a first through hole, and the end fitting is connected to the second fixing plate through the first through hole.

5. The transmission tower according to claim 4, characterized in that: The second fixing plate is provided with a plurality of second through holes, which are distributed along the height direction of the tower body. The second fixing plate selects one of the plurality of second through holes to cooperate with the first through hole to achieve connection with the end fitting.

6. The transmission tower according to claim 5, characterized in that: The edge of one side of the second fixing plate close to the end fitting is provided with recesses and protrusions distributed at intervals. After the protrusions protrude outward, a recess is formed between two adjacent protrusions. The outer edge of the protrusion is in an arc shape, so that the edge of one side of the second fixing plate close to the end fitting is wavy, and the second through hole is close to the edge of the second fixing plate and is located on the protrusion.

7. The transmission tower according to claim 1, characterized in that: The number of the first fixing plates is two, and the two first fixing plates are welded together with the second fixing plate.

8. The transmission tower according to claim 7, characterized in that: The two first fixing plates and the two second fixing plates are circumferentially distributed around the mutual connection.

9. The transmission tower according to claim 1, characterized in that: The first fixing plate is provided with a plurality of first mounting holes.

10. The transmission tower according to claim 9, characterized in that: The tower body is provided with a second mounting hole corresponding to the first mounting hole, and the first fixing plate is connected to the tower body through the cooperation between the first mounting hole and the second mounting hole.

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