Connecting rotating assembly and power transmission tower

Abstract

The application discloses a connecting rotating assembly, which comprises a first sub connecting rotating assembly and a second sub connecting rotating assembly. The first sub connecting rotating assembly comprises a base and a connecting rotating piece, and the connecting rotating piece is rotatably connected to the base around a first axis. The second sub connecting rotating assembly comprises a connecting support and a second connecting plate, and one end of the connecting support is fixedly connected to the second connecting plate. The connecting rotating assembly can be applied to a power transmission tower, and is favorable for releasing cross arm tension and optimizing cross arm and tower body stress conditions.

Description

Technical Field

[0001] This application relates to the field of power transmission technology, and in particular to a connecting rotating component and a power transmission tower. Background Technology

[0002] Power transmission lines are a vital lifeline for national economic development. If a power transmission line in a certain area fails, it will cause incalculable economic losses to the users in the area it serves. Therefore, ensuring the normal operation of power transmission lines is extremely important for daily life and economic development, and power transmission towers are a necessary condition for ensuring the normal operation of power transmission lines.

[0003] Most current power transmission towers consist of a tower body and crossarms for suspending power transmission lines, with the crossarms mounted on the tower body and extending outwards for a certain length. The inventors of this application have discovered that under extreme weather conditions such as typhoons, the tower body is susceptible to damage due to excessive stress, and the crossarms protruding from the tower body pose safety hazards such as breakage and insufficient electrical clearance between them and the tower body. Summary of the Invention

[0004] The purpose of this application is to provide a connection between the rotating component and the transmission tower that can release tension under normal operating conditions, reduce the probability of damage to the tower due to excessive stress, and reduce the probability of the composite crossarm colliding with the tower under abnormal operating conditions.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a connecting rotation assembly, the connecting rotation assembly including: a first sub-connecting rotation assembly and a second sub-connecting rotation assembly; the first sub-connecting rotation assembly including: a base and a connecting rotating member, the connecting rotating member being rotatably connected to the base about a first axis; the second sub-connecting rotation assembly including: a connecting bracket and a second connecting plate, one end of the connecting bracket being fixedly connected to the second connecting plate.

[0006] The connecting rotating component includes a rotating rod and a first connecting plate. The rotating rod extends along a first axis and is fixedly connected to the first connecting plate.

[0007] There are at least two first connecting plates, and the at least two first connecting plates are disposed opposite to each other on the outer periphery of the rotating rod.

[0008] The connecting bracket includes at least two connecting rods, one end of which is fixedly connected to the second connecting plate, and the other end of which extends radially outward from the second connecting plate.

[0009] Another type of transmission tower is provided, which includes a tower body, a composite crossarm, and the aforementioned connecting rotating assembly; the composite crossarm is rotatably connected to the tower body via the connecting rotating assembly about a rotating axis, the rotating axis intersecting the centerline of the tower body.

[0010] The composite crossarm includes at least one composite inclined insulator and at least one composite post insulator. One end of the at least one composite post insulator is connected to the tower body through a first sub-connection rotating assembly, and one end of the at least one composite inclined insulator is connected to the tower body through a second sub-connection rotating assembly. The other ends of the at least one composite inclined insulator and the other ends of the at least one composite post insulator are interconnected.

[0011] The composite post insulator rotates relative to the tower body around the first axis; the composite cable-stayed insulator rotates relative to the tower body around the second axis, and the first axis, the second axis, and the rotation axis coincide.

[0012] The angle between the rotation axis and the center line of the tower body is an acute angle.

[0013] When the composite crossarm rotates relative to the tower body, the end of the composite crossarm away from the tower body rises in a direction away from the ground.

[0014] When the composite crossarm is connected to the tower body, the composite inclined insulator is located above the composite post insulator, and the connection between the composite inclined insulator and the composite post insulator is used to hang the transmission line.

[0015] The beneficial effects of this application are as follows: On the one hand, this application sets the composite crossarm to be rotatable relative to the tower body, which can release the tension on the composite crossarm and reduce the possibility of deformation of the composite crossarm under stress. On the other hand, the rotation axis of the composite crossarm relative to the tower body is set to intersect with the central axis of the tower body, and the included angle between the two is an acute angle. Compared with the prior art where the rotation axis is perpendicular or parallel to the central axis, this can increase the movement stroke of the composite crossarm in contact with the tower body, thereby ensuring the safe electrical clearance between the composite crossarm and the tower body, reducing the probability of the composite crossarm colliding with the tower body under abnormal operating conditions, protecting the transmission tower, and improving its service life.

[0016] Considering that the end of the composite crossarm furthest from the tower is usually used to hang power transmission lines and the force it experiences is directed toward the ground, when the composite crossarm rotates relative to the tower, the end furthest from the tower rises toward the direction away from the ground. Thus, when the composite crossarm wants to rotate relative to the tower, the force experienced at the end furthest from the tower can be used to prevent the composite crossarm from rotating, thereby reducing the rotation amplitude of the composite crossarm under normal operating conditions to a certain extent.

[0017] Meanwhile, limit components are installed on both sides of the composite support insulator along the direction of rotation of the composite support insulator relative to the tower body to limit the rotation range of the composite crossarm under normal operating conditions. This prevents safety accidents such as flashover caused by excessive electrical clearance between the composite crossarm and the tower body due to excessive rotation angle. It also prevents the composite crossarm from colliding with the tower due to excessive rotation angle under normal operating conditions.

[0018] Furthermore, the first and second limiting components in the limiting assembly are rotatably connected by a connector. Under normal operating conditions, the connector ensures the connection between the first and second limiting components, thereby limiting the rotation amplitude of the composite post insulator. However, under abnormal operating conditions, when the torsional force on the composite post insulator gradually increases to exceed a set threshold, the connector automatically disconnects, separating the first and second limiting components. At this point, the limiting assembly no longer functions as a limiting device, releasing the tension on the composite crossarm, thus reducing the stress on the tower and decreasing the possibility of the tower overturning under abnormal conditions. Moreover, when it is necessary to limit the rotation angle of the composite post insulator again, it is only necessary to reinstall the connector to reconnect the first and second limiting components, which is convenient and improves maintenance efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a structural schematic diagram of one embodiment of the transmission tower of this application;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 yes Figure 2 A schematic diagram of the middle section structure;

[0023] Figure 4 yes Figure 1 Enlarged view of point B in the middle;

[0024] Figure 5 yes Figure 1 A schematic diagram of the connecting bracket in the middle. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] See Figure 1 , Figure 1 This is a structural schematic diagram of one embodiment of the transmission tower of this application. The transmission tower 1000 includes a tower body 1100, a composite crossarm 1200, and a connecting rotating assembly 1300.

[0027] The tower body 1100 can be a common transmission tower structure such as a lattice iron tower, a pole, or a composite material pole. In this embodiment, the tower body 1100 is a lattice iron tower, and the attached drawings only show part of its structure. The tower body 1100 also has a symmetrical structure with a central axis 1101.

[0028] The composite crossarm 1200 is made of composite materials and has many advantages such as high strength, light weight, corrosion resistance, easy processing, designability and good insulation. It can increase the distance between the transmission line and the ground without increasing the tower height, effectively ensuring the safety of the surrounding electrical environment. It can also eliminate the safety hazard of power tripping caused by insufficient electrical distance between the transmission line and the tower body 1100 due to excessive wind deflection.

[0029] The connecting rotating assembly 1300 connects the tower body 1100 and the composite crossarm 1200, and enables the composite crossarm 1200 to rotate relative to the tower body 1100. The rotation axis 1201 of the composite crossarm 1200 relative to the tower body 1100 intersects with the central axis 1101 of the tower body 1100, and the included angle θ between them is an acute angle.

[0030] Specifically, under the connection of the rotating assembly 1300, when the composite crossarm 1200 is subjected to a certain amount of external force, it can rotate relative to the tower body 1100 around the rotation axis 1201, release tension, and reduce the possibility of crossarm deformation under stress.

[0031] Meanwhile, the rotation axis 1201 intersects with the central axis 1101 of the tower body 1100, and the included angle θ between them is an acute angle. Compared with the prior art where the rotation axis 1201 is perpendicular or parallel to the central axis 1101, this can increase the travel distance between the composite crossarm 1200 and the tower body 1100, thereby ensuring the safety electrical clearance between the composite crossarm 1200 and the tower body 1100, reducing the probability of the composite crossarm 1200 colliding with the tower body 1100 under abnormal operating conditions, protecting the transmission tower 1000, and improving its service life.

[0032] In this embodiment, when the composite crossarm 1200 rotates relative to the tower body 1100, the end 1202 of the composite crossarm 1200 away from the tower body 1100 rises in a direction away from the ground.

[0033] Specifically, considering that the end 1202 of the composite crossarm 1200 away from the tower body 1100 is usually used to hang power transmission lines and the force it receives is directed towards the ground, under normal operating conditions, when the composite crossarm 1200 is subjected to external force and wants to rotate relative to the tower body 1100, the force received at the end 1202 can be used to prevent the composite crossarm 1200 from rotating, thereby reducing the rotation amplitude of the composite crossarm 1200 under normal operating conditions to a certain extent.

[0034] In other embodiments, when the composite crossarm 1200 rotates relative to the tower body 1100, the end 1202 of the composite crossarm 1200 away from the tower body 1100 may also descend relative to the ground, which is not limited here.

[0035] Continue reading Figures 1 to 4 In this embodiment, the connecting rotation assembly 1300 includes a first sub-connecting rotation assembly 1310 and a second sub-connecting rotation assembly 1320, while the composite crossarm 1200 includes a composite post insulator 1210 and a composite cable tie insulator 1220.

[0036] One end of the composite post insulator 1210 is rotatably connected to the tower body 1100 via a first sub-connecting rotating assembly 1310 and can rotate relative to the tower body 1100 around a first axis 1211. One end of the composite cable-stayed insulator 1220 is rotatably connected to the tower body 1100 via a second sub-connecting rotating assembly 1320 and can rotate relative to the tower body 1100 around a second axis 1221. The other end of the composite post insulator 1210 away from the tower body 1100 is connected to the other end of the composite cable-stayed insulator 1220 away from the tower body 1100 to form the end 1202 of the composite crossarm 1200 away from the tower body 1100. At the same time, the first axis 1211 and the second axis 1221 both coincide with the rotation axis 1201 of the composite crossarm 1200 rotating relative to the tower body 1100.

[0037] Specifically, the composite post insulator 1210 rotates relative to the tower body 1100 around the first axis 1211 and the composite cable-stayed insulator 1220 rotates relative to the tower body 1100 around the second axis 1221, so that the composite crossarm 1200 as a whole rotates relative to the tower body 1100 around the rotation axis 1201.

[0038] Meanwhile, the composite inclined insulator 1220 is located above the composite post insulator 1210. The connection between the composite inclined insulator 1220 and the composite post insulator 1210 is used to attach the transmission line, making full use of the tensile strength of the composite inclined insulator 1220 and the compressive strength of the composite post insulator 1210. This arrangement also allows the composite post insulator 1210 and the composite inclined insulator 1220 to form a stable support structure with an angle, resulting in reasonable stress distribution. Therefore, under extreme typhoon weather, the composite crossarm 1200 is less prone to deformation or breakage, and it can prevent wind-induced flashover accidents caused by the transmission line swaying close to the tower 1100 due to wind, ensuring a safe electrical clearance between the transmission line and the tower 1100 under high wind conditions, and guaranteeing stable power supply performance for users.

[0039] In other embodiments, the composite crossarm 1200 may also have other structures, such as including only the composite post insulator 1210 or having more than one composite post insulator 1210 and composite tie rod insulator 1220. In summary, this application does not limit the structure of the composite crossarm 1200.

[0040] See Figures 1 to 3 In this embodiment, the first sub-connecting rotating assembly 1310 includes a base 1311 and a connecting rotating member 1312.

[0041] The base 1311 is installed on the tower body 1100. In one application scenario, the base 1311 is installed on the tower body 1100 by welding. In other application scenarios, the base 1311 can also be installed on the tower body 1100 by other methods such as bolt connection. The connection between the base 1311 and the tower body 1100 can be a fixed connection or a movable connection.

[0042] The connecting rotating component 1312 is set on the base 1311, connects the composite post insulator 1210, and enables the composite post insulator 1210 to rotate relative to the base 1311 around the first axis 1211, thereby enabling the composite post insulator 1210 to rotate relative to the tower body 1100 around the first axis 1211.

[0043] Specifically, the connecting rotating member 1312 connects the base 1311 and the composite post insulator 1210, so that the composite post insulator 1210 can rotate relative to the base 1311 around the first axis 1211, thereby enabling the composite post insulator 1210 to rotate relative to the tower body 1100 around the first axis 1211.

[0044] Continue reading Figures 1 to 3 In this embodiment, the connecting rotating member 1312 includes a rotating rod 13121 and a first connecting plate 13122.

[0045] The rotating rod 13121 extends along the first axis 1211 and is rotatably mounted on the base 1311. It can rotate relative to the base 1311 around the first axis 1211. Simultaneously, the rotating rod 13121 is connected to the composite post insulator 1210, enabling the composite post insulator 1210 to rotate relative to the base 1311, and thus allowing the composite post insulator 1210 to rotate relative to the tower body 1100. In other words, after the composite post insulator 1210 is connected to the rotating rod 13121, the composite post insulator 1210 can rotate relative to the base 1311 around the first axis 1211, and consequently, rotate relative to the tower body 1100 around the first axis 1211.

[0046] In an application scenario, such as Figure 3 As shown, the rotating rod 13121 has a hollow structure, through which a connecting member such as a bolt is inserted to connect the rotating rod 13121 to the base 1311, and to allow the rotating rod 13121 to rotate around the connecting member on the base 1311.

[0047] In other embodiments, the rotating rod 13121 itself can also be directly connected to the base 1311 as a rotating shaft, so that the composite post insulator 1210 can rotate relative to the base 1311 around the first axis 1211, without any specific limitation.

[0048] The first connecting plate 13122 is connected to the rotating rod 13121, and there are two first connecting plates 13122. The two first connecting plates 13122 are arranged opposite each other along the circumference of the rotating rod 13121 to clamp the connecting hardware on the end of the composite post insulator 1210, thereby realizing the connection between the rotating rod 13121 and the composite post insulator 1210.

[0049] Specifically, two first connecting plates 13122 are used to clamp the connecting hardware at the end of the composite post insulator 1210, thereby connecting the rotating rod 13121 to the composite post insulator 1210 and ensuring the connection strength between the rotating rod 13121 and the composite post insulator 1210. The two first connecting plates 13122 and the connecting hardware at the end of the composite post insulator 1210 can be connected together by welding, or by using locking devices such as bolts.

[0050] For ease of explanation, the connecting hardware at the end of the composite post insulator 1210 is defined as the first hardware. In this embodiment, as... Figure 2 As shown, the first metal tool 1212 is a flat-leg metal tool.

[0051] In other embodiments, the connecting rotating member 1312 may not include the first connecting plate 13122. In this case, the first fitting 1212 can be directly connected to the rotating rod 13121. For example, the first fitting 1212 can be directly connected to the rotating rod 13121 by welding.

[0052] The above description focuses on the fixed connection between the composite post insulator 1210 and the rotating rod 13121. However, this application is not limited to this. In other embodiments, the composite post insulator 1210 can also be movably connected to the rotating rod 13121, as long as the composite post insulator 1210 can rotate relative to the tower body 1100 around the first axis 1211 under the drive of the rotating rod 13121.

[0053] In other embodiments, the number of first connecting plates 13122 may be one, three or even more. In short, this application does not limit the specific number of connecting rotating parts 1312.

[0054] See Figure 1 , Figure 4 and Figure 5 In this embodiment, the second sub-connection rotation assembly 1320 includes a connecting bracket 1321 and a second connecting plate 1322.

[0055] The connecting bracket 1321 is installed on the tower body 1100. In one application scenario, the connecting bracket 1321 is installed on the tower body 1100 by welding. In other application scenarios, the connecting bracket 1321 can also be installed on the tower body 1100 by other methods such as bolt connection. Moreover, the connection between the connecting bracket 1321 and the tower body 1100 can be a fixed connection or a movable connection.

[0056] One end of the second connecting plate 1322 is connected to the connecting bracket 1321, and the other end is rotatably connected to the composite inclined insulator 1220 via a connecting shaft (not shown) extending along the second axis 1221. This allows the composite inclined insulator to rotate relative to the connecting bracket 1321, thereby enabling the composite inclined insulator 1220 to rotate relative to the tower body 1100. In other words, after the composite inclined insulator 1220 is connected to the second connecting plate 1322, the composite inclined insulator 1220 can rotate relative to the second connecting plate 1322 around the second axis 1221, and thus rotate relative to the tower body 1100 around the second axis 1221.

[0057] In this embodiment, the second connecting plate 1322 is fixedly connected to the connecting bracket 1321. In other embodiments, the second connecting plate 1322 may also be movably connected to the connecting bracket 1321.

[0058] The connecting shaft (not shown in the figure) passes through the connecting hardware on the end of the second connecting plate 1322 and the composite inclined insulator 1220 to achieve a rotatable connection between the second connecting plate 1322 and the composite inclined insulator 1220. In one application scenario, the connecting shaft is a bolt.

[0059] For ease of explanation, the connecting hardware at the end of the composite inclined insulator 1220 is defined as the second hardware. In this embodiment, as... Figure 4 As shown, the second fitting 1222 is a U-shaped fitting, and the second connecting plate 1322 is clamped in the U-shaped fitting.

[0060] Specifically, the connection bracket 1321 can shorten the length of the composite inclined insulator 1220 and improve economy while ensuring a safe electrical clearance. On the other hand, it can increase the angle between the composite inclined insulator 1220 and the composite post insulator 1210, improve the tensile strength of the composite inclined insulator 1220, and prevent the equalizing device (not shown) on the composite inclined insulator 1220 from colliding with the equalizing device (not shown) on the composite post insulator 1210.

[0061] See Figure 4 and Figure 5 In this embodiment, the connecting bracket 1321 includes at least two connecting rods 13211.

[0062] At least two connecting rods 13211 have one end connected to the second connecting plate 1322 at the same time, and the other end of at least two connecting rods 13211 are radially extended from the second connecting plate 1322 and simultaneously connected to the tower body 1100.

[0063] The number of connecting rods 13211 can be two, three, or four (e.g., ...). Figure 4 and Figure 5 (As shown) or more, no limit is imposed here.

[0064] Specifically, the above arrangement allows the tensile force borne by the composite inclined insulator 1220 to be distributed to the tower body 1100, which can prevent the tensile force from being concentrated and causing the connection between the composite inclined insulator 1220 and the tower body 1100 to break, thereby ensuring the firmness of the connection between the composite inclined insulator 1220 and the tower body 1100.

[0065] In one application scenario, in order to ensure that the tower body 1100 is subjected to uniform force, the connecting bracket 1321 is a symmetrical structure, and at least two connecting rods 13211 are symmetrically arranged relative to a certain plane.

[0066] Continue reading Figure 4 and Figure 5 In this embodiment, the connecting bracket 1321 also includes a mounting plate 13212.

[0067] Mounting plate 13212 connects to second connecting plate 1322 and at least two connecting rods 13211.

[0068] Specifically, the mounting plate 13212 can further increase the length of the connecting bracket 1321, thereby shortening the length of the composite inclined insulator 1220 while ensuring safe electrical clearance, thus improving economic efficiency.

[0069] In an application scenario, such as Figure 4 and Figure 5 As shown, the second connecting plate 1322 is connected to one end of the mounting plate 13212, and the ends of at least two connecting rods 13211 abut against the surface of the mounting plate 13212.

[0070] In one application scenario, the connection between the mounting plate 13212 and at least two connecting rods 13211, and the connection between the mounting plate 13212 and the second connecting plate 1322, are fixed connections. However, this application is not limited to this. In other application scenarios, the connection between the mounting plate 13212 and at least two connecting rods 13211, and the connection between the mounting plate 13212 and the second connecting plate 1322, can also be movable connections.

[0071] In other embodiments, the connecting bracket 1321 may not include the mounting plate 13212. In this case, at least two connecting rods 13211 can be directly connected to the second connecting plate 1322.

[0072] See Figure 1 , Figure 2 and Figure 3 In this embodiment, the transmission tower 1000 also includes a limiting component 1400.

[0073] There are two limiting components 1400. The two limiting components 1400 are respectively arranged on both sides of the composite post insulator 1210 and connected to the tower body 1100 in the direction of rotation of the composite post insulator 1210 relative to the tower body 1100, and are used to limit the maximum angle of rotation of the composite post insulator 1210 relative to the tower body 1100.

[0074] Specifically, the setting of the limit component 1400 ensures the rotation range of the composite crossarm 1200 under normal operating conditions, and avoids safety accidents such as flashover caused by excessive electrical clearance between the composite crossarm 1200 and the tower body 1100 after the composite crossarm 1200 rotates too much.

[0075] In one application scenario, two limiting components 1400 are symmetrically arranged on both sides of the composite post insulator 1210.

[0076] See Figure 2 and Figure 3 In this embodiment, the limiting component 1400 includes a first limiting member 1410 and a second limiting member 1420.

[0077] One end of the first limiting member 1410 is connected to the composite post insulator 1210; one end of the second limiting member 1420 is connected to the tower body 1100, and the other end is movably connected to the end of the first limiting member 1410 away from the composite post insulator 1210, and the relative movement distance between the two is limited to a preset distance range.

[0078] Specifically, the movable distance of the end of the first limiting member 1410 away from the composite post insulator 1210 relative to the end of the second limiting member 1420 away from the tower body 1100 is limited within a preset distance range, so that the relative movable distance of the first limiting member 1410 relative to the second limiting member 1420 is limited within a preset distance range. Since one end of the first limiting member 1410 is connected to the composite post insulator 1210 and one end of the second limiting member 1420 is connected to the tower body 1100, the rotation angle of the composite post insulator 1210 relative to the tower body 1100 is limited within a preset angle range, so that the limiting component 1400 plays a limiting role.

[0079] In this embodiment, one end of the first limiting member 1410 is fixedly connected to the composite post insulator 1210, and one end of the second limiting member 1420 is fixedly connected to the tower body 1100. However, this application is not limited to this. In other embodiments, one end of the first limiting member 1410 may also be movably connected to the composite post insulator 1210, and one end of the second limiting member 1420 may also be movably connected to the tower body 1100, as long as the angle of rotation of the composite post insulator 1210 relative to the tower body 1100 is limited within the angle range under the action of the limiting component 1400.

[0080] In one application scenario, the first limiting member 1410 and the first fitting 1212 on the composite post insulator 1210 are directly connected.

[0081] In another application scenario, the first limiting member 1410 and the connecting rotating member 1312 are connected to achieve the connection between the first limiting member 1410 and the composite post insulator 1210. For details, please refer to... Figures 2 to 3 At this time, the connecting rotating member 1312 also includes a third connecting plate 13123. The third connecting plate 13123 is connected to the periphery of the rotating rod 13121. The first limiting member 1410 is connected to the third connecting plate 13123 to achieve connection with the connecting rotating member 1312, and then to the composite post insulator 1210.

[0082] In this application scenario, to ensure connection strength, there are two first limiting members 1410, a third connecting plate 13123 is clamped at one end of the two first limiting members 1410, and a second limiting member 1420 is clamped at the other end of the two first limiting members 1410. Of course, in other application scenarios, there can be only one first limiting member 1410.

[0083] Continue reading Figure 2 and Figure 3 In this embodiment, the limiting component 1400 further includes a connector 1430. The connector 1430 connects the other end of the second limiting component 1420 away from the tower body 1100 to the other end of the first limiting component 1410 away from the composite post insulator 1210, so that the other end of the second limiting component 1420 away from the tower body 1100 can move relative to the other end of the first limiting component 1410 away from the composite post insulator 1210; wherein, when the external force on the composite crossarm 1200 is greater than a set threshold, the connector 1430 automatically disconnects, thereby separating the first limiting component 1410 from the second limiting component 1420.

[0084] Specifically, under normal operating conditions, the connector 1430 ensures the connection between the first limiting member 1410 and the second limiting member 1420. At this time, the composite crossarm 1200 can rotate within the limited angle range, avoiding abnormal discharge caused by the composite crossarm 1200 being too close to the tower body within the normal stress range. However, when encountering abnormal operating conditions such as typhoons, the torsional force on the composite crossarm 1200 will gradually increase. When the torsional force gradually increases to a value greater than the set threshold, the connector 1430 will automatically disconnect, and the first limiting member 1410 and the second limiting member 1420 will separate. At this time, the limiting component 1400 will no longer restrict the rotation angle of the composite crossarm 1200, and the tension on the composite crossarm 1200 can be released, thereby reducing the stress on the tower body 1100 and reducing the possibility of the tower body 1100 overturning under abnormal operating conditions.

[0085] When the limit component 1400 needs to limit the rotation angle of the composite post insulator 1210 again, it is only necessary to reinstall the connector 1430, which is convenient to operate and can improve the efficiency of operation and maintenance.

[0086] In one application scenario, connector 1430 is a shear bolt.

[0087] In an application scenario, such as Figure 2 and Figure 3As shown, the connector 1430 is fixedly connected to the second limiting member 1420 and movably connected to the first limiting member 1410, thereby realizing the movable connection between the first limiting member 1410 and the second limiting member 1420. At this time, the first limiting member 1410 is provided with a through hole 1411, which is an oblong hole. The connector 1430 can only slide within the through hole 1411, thereby limiting the movement distance of the first limiting member 1410 relative to the second limiting member 1420 to a preset distance range.

[0088] In another application scenario, the second limiting member 1420 may have a through hole 1411, and the connecting member 1430 may be fixedly connected to the first limiting member 1410 and movably connected to the second limiting member 1420.

[0089] In other embodiments, the limiting component 1400 may not include the connecting member 1430. In this case, the first limiting member 1410 and the second limiting member 1420 are directly rotatably connected. For example, one of the first limiting member 1410 and the second limiting member 1420 is provided with a protrusion, and the other is provided with a groove. The protrusion is slidably disposed in the groove, thereby realizing that the first limiting member 1410 and the second limiting member 1420 are movably connected and the relative movement distance between them is limited to a preset distance range.

[0090] In summary, this application does not restrict how the first limiting member 1410 and the second limiting member 1420 are movably connected.

[0091] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A transmission tower, characterized in that, The transmission tower includes a tower body, a composite crossarm, and a connecting rotating assembly; the composite crossarm is rotatably connected to the tower body via the connecting rotating assembly about a rotating axis, the rotating axis intersecting the centerline of the tower body; the connecting rotating assembly includes a first sub-connecting rotating assembly and a second sub-connecting rotating assembly. The composite crossarm includes at least one composite inclined insulator and at least one composite post insulator. One end of at least one composite post insulator is connected to the tower body via a first sub-connecting rotating assembly, and one end of at least one composite inclined insulator is connected to the tower body via a second sub-connecting rotating assembly. The other ends of at least one composite inclined insulator and at least one composite post insulator are interconnected. The first sub-connecting rotating assembly includes a base and a connecting rotating member. The connecting rotating member is rotatably connected relative to the base about a first axis, allowing the composite post insulator to rotate relative to the tower body about the first axis. The second sub-connecting rotating assembly includes a connecting bracket and a second connecting plate. One end of the second connecting plate is fixedly connected to the connecting bracket, and the other end of the second connecting plate is provided with a connecting shaft extending along a second axis, allowing the composite inclined insulator to rotate relative to the tower body about the second axis. The connecting bracket includes at least two connecting rods and a mounting plate. One end of the mounting plate is fixedly connected to the second connecting plate. One end of each of the at least two connecting rods abuts against the surface of the mounting plate, so that one end of each of the at least two connecting rods is fixedly connected to the second connecting plate. The other ends of the at least two connecting rods radiate outward from the second connecting plate. The connecting bracket has a symmetrical structure. The first axis, the second axis, and the rotation axis coincide.

2. The transmission tower according to claim 1, characterized in that, The connecting rotating component includes a rotating rod and a first connecting plate. The rotating rod extends along the first axis and is fixedly connected to the first connecting plate.

3. The transmission tower according to claim 2, characterized in that, There are at least two first connecting plates, and the at least two first connecting plates are disposed opposite to each other on the outer periphery of the rotating rod.

4. The transmission tower according to claim 1, characterized in that, The angle between the axis of rotation and the centerline of the tower body is an acute angle.

5. The transmission tower according to claim 1, characterized in that, As the composite crossarm rotates relative to the tower body, the end of the composite crossarm away from the tower body rises in a direction away from the ground.

6. In the transmission tower according to claim 1, when the composite crossarm is connected to the tower body, the composite inclined insulator is located above the composite post insulator, and the connection between the composite inclined insulator and the composite post insulator is used to hang the transmission line.

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