Cross arm assembly and power transmission tower

Abstract

The application discloses a cross arm assembly, comprising: at least one insulator, one end of the at least one insulator being used for being connected with a tower body of a power transmission tower, forming a low-voltage end of the cross arm assembly, the other end being used as an end of the cross arm assembly for hanging a power transmission line, forming a high-voltage end of the cross arm assembly; and a high-voltage end fitting, comprising a fixed part and at least one rotating part, the rotating part being rotatably connected with the other end of the insulator, so that the high-voltage end fitting is rotatably connected with the high-voltage end of the cross arm assembly, and the fixed part is used for being connected with the power transmission line. The application also discloses a power transmission tower. By arranging the high-voltage end of the cross arm assembly to be rotatably connected with the high-voltage end fitting, the unbalanced tension of the power transmission line can be effectively released, so that the power transmission tower meets the longitudinal stress requirement, the tower head is more compact, and the economy is higher.

Description

Technical Field

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

[0002] Existing transmission towers typically use short suspension hardware to suspend the transmission lines onto the crossarm assemblies, and this suspension hardware string releases some of the unbalanced tension caused by line breaks or uneven icing. Although the length of the suspension hardware string is relatively short, the impact of wind deflection on the length of the crossarm assembly must still be considered when designing the tower head, as well as the electrical clearance between the high-voltage ends of the upper and lower crossarm assemblies. This results in a large tower head size and low economic efficiency for existing transmission towers. Summary of the Invention

[0003] One of the purposes of this application is to provide a crossarm assembly, wherein the rotatable high-voltage end fitting connected to the high-voltage end of the crossarm assembly can effectively release the unbalanced tension of the transmission line, so that the transmission tower can meet the longitudinal stress requirements while the tower head arrangement is more compact and more economical.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows: a crossarm assembly is provided, comprising: at least one insulator, one end of which is used to connect to the tower body of the transmission tower to form the low-voltage end of the crossarm assembly, and the other end of which serves as the end of the crossarm assembly for hanging the transmission line to form the high-voltage end of the crossarm assembly; a high-voltage end fitting, comprising a fixing part and at least one rotating part, the rotating part being rotatably connected to the other end of the insulator so that the high-voltage end fitting is rotatably connected to the high-voltage end of the crossarm assembly, and the fixing part being used to hang the transmission line.

[0005] The crossarm assembly includes a post insulator, one end of which is used to connect to the tower body, and the other end serves as the end of the crossarm assembly used to hang the transmission line.

[0006] The crossarm assembly also includes at least one inclined insulator. One end of both the post insulator and the inclined insulator is used to connect to the tower body, and the other end is connected together through high-voltage end fittings, serving as the end of the crossarm assembly used to hang the transmission line.

[0007] The rotating part has a rotating cavity, and the other end of the insulator is provided with a rotating body. The rotating body can rotate in the rotating cavity, so that the high-voltage end hardware is rotatably connected to the high-voltage end of the crossarm assembly.

[0008] The fixing part includes a hanging plate and a connecting plate, which are perpendicular to each other and fixedly connected. The hanging plate and the connecting plate are used to connect the rotating part.

[0009] The rotating part includes a first rotating plate and a first rotating block. The first rotating plate is fixedly connected to the connecting plate, and the first rotating block is fixedly connected to the side of the first rotating plate away from the connecting plate. The first rotating block has a rotating cavity.

[0010] The rotating part includes two second rotating plates and a second rotating block. The two second rotating plates are arranged at intervals and opposite each other on the same side of the second rotating block and are parallel to each other. The two second rotating plates are sandwiched on both sides of the hanging plate and are fixedly connected to the hanging plate. The second rotating block has a rotating cavity.

[0011] The rotating body is a ball head, and the rotating cavity is a ball socket.

[0012] The low-pressure end of the crossarm assembly is rotatably connected to the tower body through a hinge assembly. The hinge assembly includes a hinge support and a hinge member. The hinge support is fixedly connected to the tower body, and the hinge member is fixedly connected to the crossarm assembly. The hinge support and the hinge member are rotatably connected through a hinge shaft.

[0013] The high-voltage end fittings are connected to at least one suspension clamp, and the transmission line is hung on the suspension clamp.

[0014] The hanging plate is provided with at least one hanging hole, and a suspension clamp is hung in the hanging hole.

[0015] The second objective of this application is to provide a transmission tower, including a tower body and the aforementioned crossarm assembly, wherein the crossarm assembly is disposed on the tower body.

[0016] The beneficial effects of this application are as follows: Unlike the prior art, the high-voltage end of the crossarm assembly is rotatably connected to the high-voltage end fitting, which can effectively release the unbalanced tension of the transmission line. It is no longer necessary to release the unbalanced tension through a suspension fitting string of a certain length, so that the transmission line can be directly hung on the high-voltage end fitting through the suspension clamp. This makes the transmission tower more compact in terms of tower head arrangement while meeting the longitudinal force requirements, thereby reducing the overall cost.

[0017] Meanwhile, by setting the low-pressure end of the crossarm assembly to rotate with the tower body, the unbalanced tension can be further released, the stress on the crossarm assembly can be reduced, and the specifications of the crossarm assembly can be reduced, thereby further reducing costs.

[0018] Furthermore, the high-voltage end fittings provided in this application can be used to mount single-conductor transmission lines, double-split transmission lines, and triple-split transmission lines, thus expanding the application range and increasing economic efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application, the accompanying drawings required 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. Among them:

[0020] Figure 1 This is a partial structural schematic diagram of a transmission tower 10 according to an embodiment of this application;

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

[0022] Figure 3 This is a schematic diagram of the structure of the high-voltage end fitting 110 according to an embodiment of this application;

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

[0024] Figure 5 yes Figure 1 Enlarged view of point C in the middle;

[0025] Figure 6 This is a partial structural schematic diagram of a transmission tower 10 according to another embodiment of this application;

[0026] Figure 7 yes Figure 1 Enlarged view of point D in the middle;

[0027] Figure 8 yes Figure 1 Enlarged diagram of point E in the middle. Detailed Implementation

[0028] 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.

[0029] See Figure 1 In one embodiment of this application, the transmission tower 10 includes a tower body 11 and a crossarm assembly 12. One end of the crossarm assembly 12 is connected to the tower body 11 and is the low-voltage end of the crossarm assembly 12. The other end of the crossarm assembly 12 is used to hang the transmission line and is the high-voltage end of the crossarm assembly 12. The high-voltage end of the crossarm assembly 12 is rotatably connected to a high-voltage end fitting 110.

[0030] Furthermore, the crossarm assembly 12 includes at least one insulator 120, one end of which is used to connect to the tower body 11 of the transmission tower 10 to form the low-voltage end of the crossarm assembly 12, and the other end serves as the end of the crossarm assembly 12 for hanging the transmission line to form the high-voltage end of the crossarm assembly 12.

[0031] When the crossarm assembly 12 includes only one insulator 120, one end of the insulator 120 is used to connect to the tower body 11, and the other end serves as the end of the crossarm assembly 12 for hanging the transmission line. When the crossarm assembly 12 includes multiple insulators 120, one end of the multiple insulators 120 is used to connect to the tower body 11 of the transmission tower 10, and the other end is connected together by high-voltage end fittings 110 to form the end of the crossarm assembly 12 for hanging the transmission line.

[0032] When there is only one insulator 120, the insulator 120 is a post insulator 121. One end of the post insulator 121 is used to connect to the tower body 11 of the transmission tower 10, and the other end is rotatably connected to the high-voltage end fitting 110, which serves as a crossarm assembly 12 for hanging the end of the transmission line.

[0033] Continue reading Figure 1 When there are multiple insulators 120, the multiple insulators 120 may include post insulators 121 and inclined insulators 122. One end of the post insulator 121 and the inclined insulator 122 is used to connect to the tower body 11 of the transmission tower 10, and the other end is connected together through high-voltage end fittings 110 to form a crossarm assembly 12 for hanging the end of the transmission line.

[0034] This application does not limit the number of post insulators 121 and tie rod insulators 122; the number of post insulators 121 and tie rod insulators 122 can be one or more. For example, in Figure 1 In this crossarm assembly 12, there is only one post insulator 121 and one tie rod insulator 122, meaning the crossarm assembly 12 is a single-post, single-tie structure. One end of each post insulator 121 and tie rod insulator 122 is connected to the tower body 11 of the transmission tower 10, and the other ends are connected together to form the end of the crossarm assembly 12 used for suspending the transmission line. The tie rod insulator 122 is located above the post insulator 121, and the axis of the tie rod insulator 122 is in the same vertical plane as the axis of the post insulator 121. The angle between the post insulator 121 and the tie rod insulator 122 ranges from 15° to 45°, for example, 15°, 30°, or 45°. The arrangement of the post insulator 121 and tie rod insulator 122 creates a stable triangular structure between the crossarm assembly 12 and the tower body 11 of the transmission tower 10, which greatly improves the stability of the crossarm assembly 12.

[0035] See Figures 1-3The high-voltage end fitting 110 includes a fixed part 111 and at least one rotating part 112 connected to the fixed part 111. The fixed part 111 is provided with at least one hanging hole 11112 for hanging the transmission line, and the at least one rotating part 112 is provided with a rotating cavity 115.

[0036] The fixing part 111 includes a hanging plate 1111 and a connecting plate 1112, which are perpendicular to each other and fixedly connected. The hanging plate 1111 is an irregularly shaped plate, and its upper edge away from the connecting plate 1112 is provided with a connecting hole 11111 for connecting the rotating part 112, and the inclined insulator 122 is connected through the rotating part 112. The lower edge of the hanging plate 1111 is provided with three hanging holes 11112 at intervals, two of which are located at both ends of the lower edge of the hanging plate 1111, and the other hanging hole 11112 is located in the middle of the lower edge of the hanging plate 1111. The horizontal height of the hanging hole 11112 located in the middle of the lower edge of the hanging plate 1111 is higher than that of the hanging holes 11112 at both ends of the lower edge of the hanging plate 1111, so as to hang the split transmission line. In this embodiment, there are three hanging holes 11112, which can be used to hang single transmission lines, double-split transmission lines, and triple-split transmission lines, thus broadening the application range and improving economic efficiency. In other embodiments, only one, two, or more hanging holes may be provided, respectively for hanging single transmission lines, double-split transmission lines, or other multi-split transmission lines. The specific positions of the hanging holes can also be set in other locations, adjusted according to actual usage requirements, as long as the transmission lines do not interfere with each other; no specific restrictions are imposed here.

[0037] The high-voltage end fitting 110 is connected to at least one suspension clamp 116, and the transmission line is hung on the suspension clamp 116. The suspension clamp 116 is connected to the hanging hole 11112. When there is one suspension clamp 116, it can be hung on any one of the hanging holes 11112 for hanging a single transmission line; when there are two suspension clamps 116, they can be hung on any two hanging holes 11112 for hanging a double-split transmission line. Preferably, the two suspension clamps 116 are hung in the hanging holes 11112 at both ends of the hanging plate 1111. When there are three wire clamps 116, the three hanging holes 11112 can be arranged in an inverted triangular structure on the high-voltage end hardware 110. The three suspension wire clamps 116 are respectively hung on the three hanging holes 11112 for hanging the three-split transmission lines. In other embodiments, a combination structure of T-shaped plate and U-shaped hanging ring can also be used. One end of the U-shaped hanging ring is connected to the high-voltage end hardware, and the other end is connected to the T-shaped plate. The two sides and the bottom end of the T-shaped plate are used to connect the suspension wire clamps for hanging the three-split transmission lines. The transmission line is directly suspended from the high-voltage end hardware 110 by the suspension wire clamps 116, without considering the influence of wind deflection on the length of the crossarm assembly 12. The vertical distance of the crossarm assembly 12 can also be further shortened, and the tower head arrangement of the transmission tower 10 is more compact than that of conventional transmission towers.

[0038] It should be noted that the upper edge, lower edge, and horizontal height mentioned above refer to the relative positions of the high-voltage end fitting 110 when it is installed on the crossarm assembly 12. That is, when the high-voltage end fitting 110 is installed on the crossarm assembly 12, the connection hole 11111 is located at the top, the hanging hole 11112 is located at the bottom, the edge of the high-voltage end fitting 110 away from the ground is the upper edge, the edge of the high-voltage end fitting 110 close to the ground is the lower edge, and the vertical distance between the horizontal plane where the target is located and the ground is the horizontal height.

[0039] The connecting plate 1112 is a circular plate, vertically fixed to the end of the hanging plate 1111 away from the connecting hole 11111. The connection between the hanging plate 1111 and the connecting plate 1112 is located on the center line of the connecting plate 1112, so that the high-voltage end hardware 110 is evenly stressed after being installed on the crossarm assembly 12, avoiding uneven load. There are four mounting holes distributed around the center of the connecting plate 1112 for connecting the rotating part 112. Furthermore, two first reinforcing ribs are symmetrically arranged between the hanging plate 1111 and the connecting plate 1112. The two first reinforcing ribs are both right-angled triangular plates and are located on both sides of the hanging plate 1111. That is, the short sides of the two first reinforcing ribs symmetrically abut against the center line of the connecting plate 1112, and the long sides abut against the two sides of the hanging plate 1111 respectively. In other words, the two first reinforcing ribs are perpendicular to the hanging plate 1111 and the connecting plate 1112 respectively. The first reinforcing rib can improve the connection strength between the hanging plate 1111 and the connecting plate 1112, thereby improving the overall mechanical strength of the high-voltage end fitting 110.

[0040] In one application scenario, please refer to [further details]. Figure 3The rotating part 112 is the first rotating part 113, which is fixedly connected to the connecting plate 1112 of the fixing part 111. The first rotating part 113 includes a first rotating plate 1131 and a first rotating block 1132. The first rotating plate 1131 is a circular plate with the same dimensions as the connecting plate 1112. Four first rotating holes are distributed circumferentially around the center of the first rotating plate 1131. The four first rotating holes on the first rotating plate 1131 correspond one-to-one with the four mounting holes on the connecting plate 1112. By inserting mutually cooperating bolts, nuts, and other fasteners into the corresponding first rotating holes and mounting holes, the first rotating plate 1131 and the connecting plate 1112 are fixedly connected, thereby realizing the fixed connection between the first rotating part 113 and the fixing part 111. The first rotating block 1132 is a cylindrical block, which is fixedly connected to the side of the first rotating plate 1131 away from the connecting plate 1112 and is located at the center of the first rotating plate 1131. Two second reinforcing ribs are symmetrically arranged between the first rotating block 1132 and the first rotating plate 1131. Both second reinforcing ribs are right-angled trapezoidal plates, located on opposite sides of the first rotating block 1132. Specifically, the long bases of the two second reinforcing ribs symmetrically abut against the center line of the first rotating plate 1131, and their right-angled sides abut against the opposite sides of the first rotating block 1132. In other words, the two second reinforcing ribs are perpendicular to both the first rotating block 1132 and the first rotating plate 1131. The second reinforcing ribs improve the connection strength between the first rotating block 1132 and the first rotating plate 1131. In other embodiments, three, four, or more first and second reinforcing ribs may be provided, or they may be of other shapes, or no first and second reinforcing ribs may be provided at all, depending on the specific strength requirements. No specific limitations are imposed here.

[0041] For another application scenario, please refer to [link / reference]. Figure 2The rotating part 112 is a second rotating part 114, connected to the connecting hole 11111 of the fixed part 111. The second rotating part 114 includes two second rotating plates 1141 and a second rotating block 1142. The two second rotating plates 1141 are spaced apart and arranged opposite each other on the same side of the second rotating block 1142, and the two second rotating plates 1141 are arranged parallel to each other. Each of the two second rotating plates 1141 is provided with a second rotating hole corresponding to the connecting hole 11111, and the two second rotating holes on the two second rotating plates 1141 are coaxially arranged. The second rotating part 114 is clamped on both sides of the connecting hole 11111 by the two second rotating plates 1141, so that the two second rotating holes and the connecting hole 11111 are corresponding and coaxial. Then, by passing through mutually cooperating bolts, nuts and other fasteners, the second rotating plates 1141 and the hanging plate 1111 are fixedly connected, thereby realizing the fixed connection between the second rotating part 114 and the fixed part 111. The second rotating block 1142 is an irregularly shaped block, with one side being a flat surface and the other side being an arc surface. Two second rotating plates 1141 are arranged at intervals opposite each other on the flat surface of the second rotating block 1142.

[0042] The rotating part 112 has a rotating cavity 115, that is, the first rotating part 113 and the second rotating part 114 both have a rotating cavity 115 inside, and the rotating cavity 115 can be rotatably connected to the rotating body 123. The other end of at least one post insulator 121 and / or at least one inclined insulator 122 is connected to the rotating body 123, and the rotating body 123 can rotate within the rotating cavity 115, so that the high-voltage end fitting 110 is rotatably connected to the high-voltage end of the crossarm assembly 12. When the crossarm assembly 12 is not installed on the tower body 11, the rotating body 123 can rotate 360° around the axis of the corresponding insulator 120 within the rotating cavity 115, which can quickly adjust the angle of the post insulator 121 and / or the inclined insulator 122, facilitating subsequent installation. After the crossarm assembly 12 is installed on the tower body 11, the rotating body 123 can rotate at multiple angles within the rotating cavity 115, effectively releasing the unbalanced tension of the transmission line. This allows the transmission line to be directly hung on the high-voltage end fitting 110 via the suspension clamp 116, eliminating the need to release the unbalanced tension by setting a certain length of suspension fitting string at the high-voltage end of the crossarm assembly as in the prior art. This allows the transmission tower 10 to meet the longitudinal stress requirements while having a more compact tower head arrangement, thereby reducing the overall cost.

[0043] In this embodiment, the rotating body 123 is a ball head, and the rotating cavity 115 is a ball socket. Specifically, at least one post insulator 121 and / or at least one tie rod insulator 122 has a ball head connected to its other end. The first rotating part 113 and / or the second rotating part 114 have ball sockets inside, and the first rotating block 1132 and / or the second rotating block 1142 also have ball sockets inside. The ball head can rotate within the ball sockets. In other embodiments, the rotating body and rotating cavity can also be other mutually cooperating rotating structures, such as a cylinder and a cylindrical cavity, etc., designed according to specific requirements, and are not specifically limited here.

[0044] In this embodiment, the crossarm assembly 12 is a single-column, single-pull structure. The high-voltage end fitting 110 is connected to a first rotating part 113 and a second rotating part 114. The other end of the post insulator 121 and the inclined pull insulator 122 are both connected to a rotating body 123. The rotating body 123 at the other end of the post insulator 121 is rotatably connected to the first rotating part 113, and the rotating body 123 at the other end of the inclined pull insulator 122 is rotatably connected to the second rotating part 114, so that the high-voltage end fitting 110 is completely rotatably connected to the crossarm assembly 12. In other embodiments, the high-voltage end fitting may also be provided with only one first rotating part or one second rotating part. Correspondingly, only the other end of the post insulator or the inclined insulator may be connected to a rotating body, so that the high-voltage end fitting is partially rotatably connected to the crossarm assembly. When the crossarm assembly is a single-post double-tension, single-post triple-tension, double-post double-tension, or other structures, one or more first rotating parts and / or second rotating parts may also be provided. The other end of any one or more insulators may be connected to a rotating body, so that the high-voltage end fitting is partially or completely rotatably connected to the crossarm assembly. The number of rotating parts of the high-voltage end fitting and the number of rotating bodies of the insulators may be adjusted to match the specific structure of the crossarm assembly, and no specific limitation is made here.

[0045] The hanging plate 1111 of the fixing part 111 is manufactured by forging. The thickness of the plate surface at the four edges of the hanging plate 1111, the edges of the connecting holes 11111 and the hanging holes 11112, and the center line position where the hanging holes 11112 are located is greater than the thickness of the plate surface at other positions of the hanging plate 1111, which facilitates production and improves the mechanical properties of the hanging plate 1111. The connecting plate 1112 is manufactured by casting, which is simple to produce. After the hanging plate 1111 and the connecting plate 1112 are formed separately, they are welded together to form the fixing part 111. In other embodiments, the hanging plate can also be manufactured by casting or other processes, the hanging plate can also be of uniform thickness, or the hanging plate can be of other shapes, the connecting plate can also be manufactured by forging or other processes, or the connecting plate and the hanging plate can be directly integrally formed into the fixing part. It can be designed according to specific needs, and no specific limitation is made here.

[0046] In one application scenario, please refer to [further details]. Figure 1 , Figure 4 and Figure 5 The low-voltage end of the crossarm assembly 12 is fixedly connected to the tower body 11. One end of the post insulator 121 is fixedly connected to the tower body 11 through the first connecting assembly 13, and one end of the inclined insulator 122 is fixedly connected to the tower body 11 through the second connecting assembly 14, thereby ensuring a reliable connection between the crossarm assembly 12 and the tower body 11.

[0047] See Figure 1 and Figure 4 The first connecting assembly 13 includes a connecting base plate 131 and a connecting ear 132. The connecting ear 132 is fixedly disposed on the connecting base plate 131. The connecting base plate 131 is fixedly connected to the tower body 11, and the connecting ear 132 is fixedly connected to the post insulator 121. The connecting base plate 131 is provided with several through holes, and the tower body 11 is provided with several corresponding through holes. The fixed connection between the connecting base plate 131 and the tower body 11 is achieved by inserting mutually cooperating fasteners such as bolts and nuts through the corresponding through holes on the connecting base plate 131 and the tower body 11.

[0048] Furthermore, to securely connect the post insulator 121, the first connecting assembly 13 is provided with four connecting ears 132. These four connecting ears 132 are symmetrically distributed in a cross shape at the center of the connecting base plate 131, with one end of each connecting ear abutting against the other. Each connecting ear 132 is a right-angled trapezoidal plate, with its longer right-angled side pressed against the connecting base plate 131, and its shorter right-angled side abutting against the other connecting ears; that is, the shorter right-angled sides of all four connecting ears 132 abut against each other. This improves the connection strength of the connecting ears 132 while reducing material costs. The connecting ears 132 are fixed to the connecting base plate 131 by welding. Of course, in other embodiments, there can be two, three, or more connecting ears, as long as a stable connection between the post insulator and the tower body is achieved; no specific limitation is made here.

[0049] The post insulator 121 is fixedly connected to the first connecting assembly 13 via a connector 17. A first flange 1211 is provided at the end of the post insulator 121 closest to the tower body 11. The first flange 1211 includes a first sleeve 12111 and a cross plate 12112. The first sleeve 12111 is fixedly connected to one end of the post insulator 121, and the cross plate 12112 is fixedly disposed at the end of the first sleeve 12111 away from the post insulator 121. The cross plate 12112 and the connecting lug 132 are fixedly connected via the connector 17, thereby fixing the post insulator 121 to the first connecting assembly 13. In other embodiments, the first sleeve and the cross plate can also be fixedly connected by welding or other methods; no specific limitation is made here.

[0050] The end of the cross plate 12112 away from the first sleeve 12111 abuts against the top of the cross of the connecting ear 132. The connector 17 includes four angle steels arranged opposite to each other. Each angle steel includes two flat plates connected perpendicularly to each other and has an L-shaped cross section. Each angle steel is respectively arranged between two adjacent connecting ears 132. That is, the flat plates of each angle steel abut against the adjacent connecting ears 132 and the adjacent plates of the cross plate 12112 at the same time. Each angle steel is also fixedly connected to the connecting ear 132, the cross plate 12112 and the adjacent angle steel, thereby fixing the first connecting assembly 13 and the post insulator 121. The cross-shaped insert plate 12112 has several through holes, and the connecting lugs 132 also have several through holes near the positions where the four connecting lugs 132 abut against each other. The connecting piece 17 also has several through holes at the corresponding positions where it abuts against the cross-shaped insert plate 12112 and the connecting lugs 132. By inserting matching bolts, nuts, or other fasteners through the corresponding matching through holes on the cross-shaped insert plate 12112, the connecting lugs 132, and the connecting piece 17, the cross-shaped insert plate 12112 and the connecting lugs 132 are fixedly connected. In other embodiments, the connecting piece can also be two, three, or more angle steels, or the connecting piece can also be a connecting plate or other structure, or the cross-shaped insert plate, the connecting lugs, and the connecting piece can also be fixedly connected by welding or other methods, as long as the cross-shaped insert plate and the connecting lugs can be fixedly connected, no specific limitation is made here.

[0051] Furthermore, the connector 17 is provided with multiple sets of through holes, each set of through holes can be used to fix the cross plate 12112 and the connecting ear 132, thereby making the relative distance between the cross plate 12112 and the connecting ear 132 adjustable, increasing the redundancy of installation, reducing the difficulty of installation, and improving the efficiency of installation.

[0052] See Figure 1 and Figure 5 The second connecting component 14 includes a first sub-connecting fitting 141 and a second sub-connecting fitting 142. The first sub-connecting fitting 141 is used to connect with the inclined insulator 122. One end of the second sub-connecting fitting 142 is adjustablely connected to the first sub-connecting fitting 141, and the other end is used to connect to the tower body 11, thereby realizing the fixed connection between the inclined insulator 122 and the tower body 11.

[0053] The first sub-connecting hardware 141 is a fan-shaped flat-angle hardware with several mounting parts 1411 arranged in an arc. The second sub-connecting hardware 142 is selectively connected to one of the mounting parts 1411. The second sub-connecting hardware 142 includes several interconnected right-angle hanging plates 1421. The right-angle hanging plates 1421 have an overall U-shaped structure. By setting multiple mounting parts 1411 and multiple right-angle hanging plates 1421, the distance and relative angle between the tower body 11 and the inclined insulator 122 can be adjusted, increasing the redundancy of the installation, reducing the installation difficulty, and improving the installation efficiency.

[0054] The inclined insulator 122 is fixedly connected to the first sub-connecting fitting 141 by fasteners. One end of the inclined insulator 122 is provided with a U-shaped groove fitting 1221. Both plates of the U-shaped groove fitting 1221 have through holes, and the first sub-connecting fitting 141 has corresponding through holes. By inserting mating bolts, nuts, or other fasteners through the through holes of the first sub-connecting fitting 141 and the U-shaped groove fitting 1221, the first sub-connecting fitting 141 and the U-shaped groove fitting 1221 are fixedly connected. In other embodiments, the several mounting parts may be arranged in a straight line along the extension direction of the inclined insulator, or the second sub-connecting fitting may be connected to the inclined insulator, and the first sub-connecting fitting may be connected to the tower body; no specific limitations are imposed here.

[0055] In another application scenario, see [reference] Figures 6-8 The low-voltage end of the crossarm assembly 12 is rotatably connected to the tower body 11. One end of the post insulator 121 is connected to the tower body 11 through the first hinge assembly 15, allowing the post insulator 121 to rotate in the horizontal plane. One end of the inclined insulator 122 is connected to the tower body 11 through the second hinge assembly 16, allowing the inclined insulator 122 to rotate in the horizontal plane. This further releases unbalanced tension, reduces the stress on the crossarm assembly 12, and thus reduces the specifications of the crossarm assembly 12, thereby reducing costs.

[0056] See Figure 7 The first hinge assembly 15 includes a first hinge support 151 and a first hinge member 152. The first hinge support 151 is fixedly connected to the tower body 11, and the first hinge member 152 is fixedly connected to the post insulator 121. The first hinge support 151 and the first hinge member 152 are rotatably connected via a first hinge shaft. The first hinge support 151 includes a first hinge base plate 1511 and two first hinge side plates 1512 spaced apart and opposite to each other. The first hinge base plate 1511 has several through holes, and the tower body 11 has corresponding through holes. By inserting matching bolts, nuts, and other fasteners into the corresponding through holes of the first hinge base plate 1511 and the tower body 11, the first hinge support 151 is fixedly connected to the tower body 11. The two first hinge side plates 1512 are fixedly fixed to the first hinge base plate 1511 at intervals, and the surfaces of the two first hinge side plates 1512 are parallel to each other. The two first hinge side plates 1512 are provided with corresponding through holes; the first hinge member 152 includes a first hinge part 1521 and a U-shaped member 1522. The first hinge part 1521 is a columnar structure and is disposed between the two first hinge side plates 1512. The first hinge part 1521 is provided with corresponding through holes along its axial direction. By inserting rotating parts such as the first hinge shaft through the through holes of the two first hinge side plates 1512 and the through holes of the first hinge member 152, the first hinge member 152 and the first hinge support 151 are rotatably connected.

[0057] The post insulator 121 is fixedly connected to the first hinge member 152 by fasteners. A second flange 1212 is provided at one end of the post insulator 121 near the tower body 11. The second flange 1212 includes a second sleeve 12121 and an insert plate 12122. The second sleeve 12121 is fixedly connected to one end of the post insulator 121, and the insert plate 12122 is fixedly disposed at the end of the second sleeve 12121 away from the post insulator 121. The insert plate 12122 has through holes. The U-shaped member 1522 of the first hinge member 152 is connected to the end of the first hinge portion 1521 away from the first support 151. Through holes are correspondingly provided on the two plates of the U-shaped member 1522. By inserting mating bolts, nuts, and other fasteners into the corresponding through holes of the insert plate 12122 and the U-shaped member 1522, the insert plate 12122 and the U-shaped member 1522 are fixedly connected. In other embodiments, the insert plate and the U-shaped component can also be fixedly connected by welding or other methods, and no specific restrictions are imposed here.

[0058] The second hinge assembly 16 includes a second hinge support 161 and a second hinge member 162. The second hinge support 161 is fixedly connected to the tower body 11, and the second hinge member 162 is fixedly connected to the inclined insulator 122. The second hinge support 161 and the second hinge member 162 are rotatably connected by a second hinge shaft. The second hinge support 161 includes a second hinge base plate 1611 and two spaced-apart opposite second hinge side plates 1612. Its specific structure is similar to the overall structure of the first hinge support 151, and will not be described in detail here. The second hinge member 162 includes a second hinge portion 1621 and an arc-shaped plate 1622. The second hinge portion 1621 is a columnar structure and is disposed between two second hinge side plates 1612. The second hinge portion 1621 has a through hole along its axial direction. By inserting rotating components such as a second hinge shaft through the through holes of the two second hinge side plates 1612 and the through hole of the second hinge member 162, the rotational connection between the second hinge member 162 and the second hinge support 161 is realized.

[0059] The inclined insulator 122 and the second hinge assembly 16 are fixedly connected by the second connecting assembly 14. The specific structure of the second connecting assembly 14 and the connection method between the inclined insulator 122 and the second connecting assembly 14 have been described above and will not be repeated here. The second connecting assembly 14 and the second hinge assembly 16 are fixedly connected by inserting mutually mating bolts and nuts through corresponding through holes in the right-angle hanging plate 1421 of the second connecting assembly 14 and the arc-shaped plate 1622 of the second hinge assembly 162.

[0060] In this embodiment, the axis of the post insulator 121 is horizontally positioned, facilitating the installation of the high-voltage end fitting 110 and the stringing of the conductors. When the high-voltage end fitting 110 suspends two or more conductors, it is usually necessary to ensure that two of the conductors are at the same horizontal level. When the horizontally positioned post insulator 121 is connected to the high-voltage end fitting 110, the installation angle of the high-voltage end fitting 110 does not need to be considered during the design; the high-voltage end fitting 110 can be directly installed horizontally for stringing, simplifying the design and installation process. In other embodiments, the axis of the post insulator can also be inclined upwards relative to the horizontal direction. The specific inclination angle is designed according to requirements, simply by adjusting the installation angle of the high-voltage end fitting to ensure that the suspended conductors meet the requirements. Under the same load, the inclined post insulator bears less stress than the horizontally positioned post insulator. Furthermore, when bearing the same load, the inclined post insulator can be equipped with smaller insulators, ensuring safety while improving economy.

[0061] In this embodiment, the rotation axis of the post insulator 121 and the rotation axis of the inclined insulator 122 are collinear, and the rotation axis is vertical. When longitudinal unbalanced tension occurs on the conductors on both sides of the crossarm assembly 12, the post insulator 121 and the inclined insulator 122 can deflect in the horizontal plane, causing changes in parameters such as the span of the conductors on both sides (the horizontal distance between the suspension points of the conductors of two adjacent transmission towers). Then, when the deflection reaches an appropriate position, the tension of the conductors on both sides reaches a new equilibrium, completing the release of longitudinal unbalanced tension.

[0062] In other embodiments, the rotation axis can also be inclined relative to the vertical direction. The inclination angle of the rotation axis is designed according to requirements, and only the connection structure of the transmission tower needs to be adjusted accordingly. Since the rotation trajectory of the high-voltage end of the crossarm assembly is an arc trajectory with a radius equal to the vertical distance from the high-voltage end to the rotation axis within a rotation plane perpendicular to the rotation axis, for a vertically positioned rotation axis, its high-voltage end rotates within a horizontal rotation plane and does not move upwards in the vertical direction. When the rotation axis is inclined relative to the vertical direction, the rotation plane perpendicular to it will tilt upwards relative to the horizontal direction. Therefore, when the post insulator and the inclined insulator rotate around the inclined rotation axis, the high-voltage end tends to move upwards. That is, when the post insulator and the inclined insulator do not rotate, the high-voltage end is in a stationary state and located at its lowest point; when the post insulator and the inclined insulator rotate relative to the tower body, the high-voltage end moves upwards. The high-voltage end of the crossarm assembly bears the weight of the suspended conductor and the crossarm assembly itself, and thus bears a vertically downward load. This can suppress the upward movement of the high-voltage end, thereby suppressing the continued rotation of the crossarm assembly. This achieves the effect of preventing the crossarm assembly from rotating too much and thus ensuring that the electrical clearance between the conductor and the tower is insufficient. The crossarm assembly reaches a balanced state when the post insulator and the inclined insulator stop rotating.

[0063] In another embodiment, the crossarm assembly includes a post insulator and at least two tie rod insulators, i.e., the number of tie rod insulators can be two, three, or more. One end of the post insulator and the at least two tie rod insulators are connected to the tower body of the transmission tower, and the other end is connected together by high-voltage end fittings to form the end of the crossarm assembly used for hanging the transmission line.

[0064] When there are two or more inclined insulators, the crossarm assembly corresponds to a single-column double-tension, single-column triple-tension (and so on) structure, with several inclined insulators arranged at intervals around the post insulator. When the crossarm assembly is a single-column double-tension structure, the two inclined insulators are located above the post insulator, and the angle between the post insulator and the inclined insulator ranges from 15° to 45°, for example, 15°, 30°, or 45°. When the crossarm assembly is a single-column three-tension structure, the axes of two inclined insulators are in the same plane as the axis of the post insulator. These two inclined insulators are defined as first inclined insulators, and the remaining inclined insulator is defined as second inclined insulators. The distances from the second inclined insulators to the two first inclined insulators are equal, and the angle between the two first inclined insulators is in the range of 45° to 90°, for example, 45°, 60° or 90°. The angle between the second inclined insulator and the post insulator is in the range of 25° to 45°, for example, 25°, 30°, 35° or 45°.

[0065] The high-voltage end fittings are equipped with one first rotating part and at least two second rotating parts. The number of second rotating parts is the same as that of the inclined insulators. The other end of the post insulator is rotatably connected to the first rotating part, and the other ends of the at least two inclined insulators are rotatably connected to the second rotating parts. It should be noted that the connection relationship between the inclined insulators and the high-voltage end fittings is universal, regardless of whether there are one, two, three, or more inclined insulators.

[0066] In another embodiment, the crossarm assembly includes two post insulators and two tie rod insulators, i.e., the crossarm assembly is a double-post, double-tie rod structure. One end of each of the two post insulators and the two tie rod insulators is connected to the tower body of the transmission tower, and the other end is connected together via high-voltage end fittings to form the end of the crossarm assembly used for suspending the transmission line. The two tie rod insulators are located on the same side of the two post insulators and are respectively positioned adjacent to the two post insulators. The angle between the two post insulators ranges from 20° to 50°, for example, 20°, 30°, 40°, 45°, or 50°. The angle between each post insulator and the adjacent tie rod insulator ranges from 15° to 45°, for example, 15°, 30°, or 45°. The arrangement of the two post insulators and the two tie rod insulators creates a stable triangular structure between the crossarm assembly and the tower body, which greatly improves the stability of the crossarm assembly.

[0067] The high-voltage end fittings are equipped with two first rotating parts and two second rotating parts respectively. The other ends of the two post insulators are rotatably connected to the two first rotating parts respectively, and the other ends of the two inclined insulators are rotatably connected to the two second rotating parts respectively.

[0068] In another embodiment, the crossarm assembly may not include tie rod insulators; in this case, the crossarm assembly consists of only one post insulator. When there is only one post insulator, the crossarm assembly is a single-post structure. One end of the post insulator is used to connect to the tower body of the transmission tower, and the other end is directly connected to the high-voltage end fitting, serving as the end of the crossarm assembly used to hang the transmission line. The high-voltage end fitting has only one first rotating part, and the other end of the post insulator is rotatably connected to the first rotating part.

[0069] The beneficial effects of this application are as follows: Unlike the prior art, the high-voltage end of the crossarm assembly is rotatably connected to the high-voltage end fitting, which can effectively release the unbalanced tension of the transmission line. It is no longer necessary to release the unbalanced tension through a suspension fitting string of a certain length, so that the transmission line can be directly hung on the high-voltage end fitting through the suspension clamp. This makes the transmission tower more compact in terms of tower head arrangement while meeting the longitudinal force requirements, thereby reducing the overall cost.

[0070] Meanwhile, by setting the low-pressure end of the crossarm assembly to rotate with the tower body, the unbalanced tension can be further released, the stress on the crossarm assembly can be reduced, and the specifications of the crossarm assembly can be reduced, thereby further reducing costs.

[0071] Furthermore, the high-voltage end fittings provided in this application can be used to mount single transmission lines, double-split transmission lines, and triple-split transmission lines, thus expanding the application range and increasing economic efficiency.

[0072] 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 crossarm assembly, characterized in that, include: At least one insulator, one end of which is used to connect to the tower body of the transmission tower to form the low-voltage end of the crossarm assembly, and the other end of which serves as the end of the crossarm assembly for hanging the transmission line to form the high-voltage end of the crossarm assembly. A high-voltage end fitting includes a fixed part and at least one rotating part. The rotating part is rotatably connected to the other end of the insulator, so that the high-voltage end fitting is rotatably connected to the high-voltage end of the crossarm assembly. The rotating part has a rotating cavity, and a rotating body is provided at the other end of the insulator. The rotating body can rotate within the rotating cavity, so that the high-voltage end fitting is rotatably connected to the high-voltage end of the crossarm assembly. The fixed part is used to hang the transmission line. The fixed part includes a hanging plate and a connecting plate. The hanging plate and the connecting plate are perpendicular to each other and fixedly connected. The hanging plate and the connecting plate are used to connect the rotating part. Wherein, at least one of the insulators includes a post insulator, one end of which is used to connect to the tower body and the other end is rotatably connected to the high-voltage end fitting, serving as the end of the crossarm assembly for hanging the transmission line; At least one of the rotating parts includes a first rotating part, and the rotating body at the other end of the post insulator is rotatably connected to the first rotating part. The first rotating part includes a first rotating plate and a first rotating block. The first rotating plate is fixedly connected to the connecting plate, and the first rotating block is fixedly connected to the side of the first rotating plate away from the connecting plate. The first rotating block has the rotating cavity. The high-voltage end fitting is connected to at least one suspension clamp, and the transmission line is hung on the suspension clamp.

2. The crossarm assembly according to claim 1, characterized in that, The crossarm assembly also includes at least one inclined insulator. One end of both the post insulator and the inclined insulator is used to connect to the tower body, and the other end is connected together through the high-voltage end fitting, serving as the end of the crossarm assembly used to hang the transmission line.

3. The crossarm assembly according to claim 1, characterized in that, At least one of the rotating parts further includes a second rotating part, which includes two second rotating plates and a second rotating block. The two second rotating plates are arranged at intervals opposite each other on the same side of the second rotating block and are parallel to each other. The two second rotating plates are sandwiched between the two sides of the hanging plate and are fixedly connected to the hanging plate. The second rotating block has the rotating cavity.

4. The crossarm assembly according to claim 1, characterized in that, The rotating body is a ball head, and the rotating cavity is a ball socket.

5. The crossarm assembly according to claim 1, characterized in that, The low-pressure end of the crossarm assembly is rotatably connected to the tower body via a hinge assembly. The hinge assembly includes a hinge support and a hinge member. The hinge support is fixedly connected to the tower body, and the hinge member is fixedly connected to the crossarm assembly. The hinge support and the hinge member are rotatably connected via a hinge shaft.

6. The crossarm assembly according to claim 1, characterized in that, The hanging plate is provided with at least one hanging hole, and a suspension clamp is hung in the hanging hole.

7. A transmission tower, comprising a tower body and a crossarm assembly as described in any one of claims 1-6, the crossarm assembly being disposed on the tower body.

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