ชุดประกอบแขนขวางและเสาส่ง

Abstract

DEPCT6925 / 11 / 2568 สิ่งที่เปิดเผยไว้ในคำขอนี้คือชุดประกอบแขนขวางซึ่งประกอบรวมด้วย:ฉนวนอย่างน้อยหนึ่งชิ้น โดยที่ปลายด้านหนึ่งของฉนวนอย่างน้อยหนึ่งชิ้นจะถูกใช้สำหรับเชื่อมต่อกับลำตัวเสาสูงของเสาสูงส่งกำลัง ในลักษณะที่ปลายฝั่งแรงดันไฟฟ้าต่ำของชุดประกอบแขนขวางจะถูกสร้างขึ้น,และปลายอีกด้านหนึ่งของ ฉนวนอย่างน้อยหนึ่งชิ้นจะทำหน้าที่เป็นส่วนปลายซึ่งถูกใช้สำหรับแขวนสายส่งกำลังของชุดประกอบแขน ขวางในลักษณะที่ปลายฝั่งแรงดันไฟฟ้าสูงของชุดประกอบแขนขวางจะถูกสร้างขึ้น;และเครื่องประกอบ ส่วนปลายฝั่งแรงดันไฟฟ้าสูงซึ่งประกอบรวมด้วยส่วนติดตรึงซึ่งถูกใช้สำหรับเชื่อมต่อกับปลายอีกด้านหนึ่ง ของฉนวนและใช้สำหรับแขวนสายส่งกำลังอย่างน้อยหนึ่งเส้นสิ่งที่เปิดเผยเพิ่มเติมในคำขอนี้คือเสาสูงส่ง กำลังในคำขอรับสิทธิบัตรฉบับนี้ปลายฝั่งแรงดันไฟฟ้าสูงของชุดประกอบแขนขวางจะถูกเชื่อมต่อกับ เครื่องประกอบส่วนปลายฝั่งแรงดันไฟฟ้าสูงในลักษณะที่โครงสร้างของเครื่องประกอบส่วนปลายฝั่ง แรงดันไฟฟ้าสูงจะถูกทำให้เรียบง่ายและแรงตึงที่ไม่สมดุลของสายส่งกำลังจะได้รับการปลดปล่อยอย่างมี ประสิทธิผลดังนั้นจึงทำให้เสาสูงส่งกำลังเป็นไปตามข้อกำหนดด้านแรงเค้นตามแนวยาว,ทำให้การจัดเรียง หัวเสาสูงกะทัดรัดขึ้น,และทำให้เสาสูงส่งกำลังมีความประหยัดคุ้มทุนมากขึ้น;

Description

Cross arm assembly and transmission tower Technical Field

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

[0002] Existing transmission towers typically use short suspension fittings to attach transmission lines to crossarm assemblies. This string of suspension fittings relieves some of the unbalanced tension caused by line breakage and uneven icing. While the suspension fittings are relatively short, the tower head design still needs to consider the impact of windage on the crossarm length, as well as the electrical clearance between the high-voltage ends of the upper and lower crossarm assemblies. This results in large tower heads and low economic efficiency.

[0003] Summary of the Invention

[0004] One of the purposes of this application is to provide a cross-arm assembly. The high-voltage end hardware connected to the high-voltage end of the cross-arm assembly has a simple structure and can effectively release the unbalanced tension of the transmission line, so that the transmission tower can meet the longitudinal force requirements while the tower head layout is more compact and more economical.

[0005] In order to solve the above technical problems, the technical solution adopted in this application is: to provide a cross-arm assembly, including: at least one insulator, one end of the at least one insulator is used to be connected to the tower body of the transmission tower, forming the low-voltage end of the cross-arm assembly, and the other end serves as the end of the cross-arm assembly for hanging the transmission line, forming the high-voltage end of the cross-arm assembly; the high-voltage end hardware includes a fixing part, which is used to connect to the other end of the insulator and hang at least one transmission line.

[0006] Among them, the cross-arm assembly includes a support insulator, one end of the support insulator is used to connect to the tower body, and the other end serves as a cross-arm assembly for hanging the end of the transmission line.

[0007] Among them, the cross-arm assembly also includes at least one diagonal insulator. One end of the support insulator and the diagonal insulator are used to connect to the tower body, and the other end is connected together through high-voltage end hardware to serve as a cross-arm assembly for hanging the end of the transmission line.

[0008] The high-voltage end fitting further comprises at least one rotating part connected to the fixed part, and 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 cross-arm assembly.

[0009] Among them, the rotating part is provided with a rotating cavity, and a rotating body is provided at the other end of the insulator. The rotating body can rotate in the rotating cavity, so that the high-voltage end hardware is rotatably connected with the high-voltage end of the cross-arm assembly.

[0010] The fixed part includes a wire hanging plate and a connecting plate, which are perpendicular to each other and fixedly connected, and are used to connect the rotating part.

[0011] The rotating part includes a first rotating plate and a first rotating block. The first rotating plate is fixedly connected to the connecting plate. The first rotating block is fixedly connected to a side of the first rotating plate away from the connecting plate. The first rotating block is provided with a rotating cavity.

[0012] Among them, the rotating part includes two second rotating plates and a second rotating block. The two second rotating plates are arranged at intervals and parallel to each other on the same side of the second rotating block. The two second rotating plates are clamped on both sides of the hanging plate and fixedly connected to the hanging plate. The second rotating block is provided with a rotating cavity.

[0013] The rotating body is a ball head and the rotating cavity is a ball socket.

[0014] Among them, the low-pressure end of the cross-arm 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 cross-arm assembly. The hinge support and the hinge member are rotatably connected through a hinge shaft.

[0015] Among them, the high-voltage end fittings are connected to at least one suspension clamp, and the transmission line is directly hung on the suspension clamp.

[0016] Wherein, the hanging plate is provided with at least one hanging hole, in which a suspension wire clip is hung.

[0017] The second purpose of the present application is to provide a transmission tower, comprising a tower body and the aforementioned cross-arm assembly, wherein the cross-arm assembly is arranged on the tower body.

[0018] The beneficial effects of the present application are as follows: different from the prior art, the high-voltage end of the cross-arm assembly is connected to the high-voltage end hardware, which has a simple structure and can effectively release the unbalanced tension of the transmission line. There is no need to release the unbalanced tension through a certain length of suspension hardware string, so that the transmission line can be directly hung on the high-voltage end hardware through the suspension wire clamp, thereby making the transmission tower meet the longitudinal force requirements while the tower head arrangement is more compact, thereby reducing the overall cost.

[0019] At the same time, the low-pressure end of the cross-arm assembly is connected to the tower body in a rotational manner, which can further release the unbalanced tension, reduce the stress on the cross-arm assembly, and thus reduce the specifications of the cross-arm assembly and further reduce costs.

[0020] In addition, the high-voltage end fittings provided in this application can be used to hang single-conductor transmission lines, double-split transmission lines, and triple-split transmission lines, which have a wider range of applications and higher economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them:

[0022] FIG1 is a schematic diagram of a partial structure of a transmission tower 10 according to an embodiment of the present application;

[0023] FIG2 is an enlarged schematic diagram of point A in FIG1 ;

[0024] FIG3 is a schematic structural diagram of a high-voltage end fitting 110 according to an embodiment of the present application;

[0025] FIG4 is an enlarged schematic diagram of point B in FIG1 ;

[0026] FIG5 is an enlarged schematic diagram of point C in FIG1 ;

[0027] FIG6 is a partial structural diagram of a transmission tower 10 according to another embodiment of the present application;

[0028] FIG7 is an enlarged schematic diagram of point D in FIG6;

[0029] FIG8 is an enlarged schematic diagram of point E in FIG6 . DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] Referring to Figure 1, in one embodiment of the present application, a transmission tower 10 includes a tower body 11 and a cross-arm assembly 12. One end of the cross-arm assembly 12 is connected to the tower body 11 and is the low-voltage end of the cross-arm assembly 12. The other end of the cross-arm assembly 12 is used to hang the transmission line and is the high-voltage end of the cross-arm assembly 12. The high-voltage end of the cross-arm assembly 12 is rotatably connected to a high-voltage end hardware 110.

[0032] Furthermore, the cross-arm assembly 12 includes at least one insulator 120, one end of the at least one insulator 120 is used to be connected to the tower body 11 of the transmission tower 10, forming the low-voltage end of the cross-arm assembly 12, and the other end serves as the end of the cross-arm assembly 12 for hanging the transmission line, forming the high-voltage end of the cross-arm assembly 12.

[0033] When the cross-arm assembly 12 includes only one insulator 120, one end of the insulator 120 is connected to the tower body 11, and the other end is connected to the high-voltage end fitting 110, forming the end of the cross-arm assembly 12 for hanging the transmission line. When the cross-arm assembly 12 includes multiple insulators 120, one end of the multiple insulators 120 is connected to the tower body 11 of the transmission tower 10, and the other ends are connected together through the high-voltage end fitting 110 to form the end of the cross-arm assembly 12 for hanging the transmission line.

[0034] When the number of insulators 120 is one, the insulator 120 is a support insulator 121, one end of which 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 cross-arm assembly 12 for hanging the end of the transmission line.

[0035] Continuing to refer to Figures 1 and 2, when there are multiple insulators 120, the multiple insulators 120 may include a post insulator 121 and a diagonal insulator 122. One end of the post insulator 121 and the diagonal insulator 122 is used to be connected to the tower body 11 of the transmission tower 10, and the other end is connected together through the high-voltage end hardware 110 to form a cross-arm assembly 12 for hanging the end of the transmission line.

[0036] The present application does not limit the number of post insulators 121 and diagonal insulators 122. The number of post insulators 121 and diagonal insulators 122 can be one or more. For example, in Figure 1, the number of post insulators 121 and diagonal insulators 122 is one, that is, the cross-arm assembly 12 is a single-column single-pull structure. One end of the post insulator 121 and the diagonal insulator 122 are both connected to the tower body 11 of the transmission tower 10, and the other ends are connected together to form a cross-arm assembly 12 for hanging the end of the transmission line. The diagonal insulator 122 is located above the post insulator 121 and the axis of the diagonal insulator 122 is located in the same vertical plane as the axis of the post insulator 121. At the same time, the angle between the post insulator 121 and the diagonal insulator 122 is in the range of 15° to 45°, for example, 15°, 30° or 45°. The arrangement of the support insulators 121 and the inclined insulators 122 allows a stable triangular structure to be formed between the cross-arm assembly 12 and the tower body 11 of the transmission tower 10 , which can greatly improve the stability of the cross-arm assembly 12 .

[0037] Referring to Figures 1-3, the high-voltage terminal fitting 110 includes a fixed portion 111 and at least one rotating portion 112 connected to the fixed portion 111. The fixed portion 111 is provided with at least one wire hanging hole 11112 for hanging a transmission line, and at least one rotating portion 112 defines a rotating cavity 115. The rotating portion 112 is rotatably connected to the other end of the insulator 120 through the rotating cavity 115, thereby rotatably connecting the fixed portion 111 to the other end of the insulator 120 through the rotating portion 112.

[0038] The fixing portion 111 includes a wire hanging plate 1111 and a connecting plate 1112. The wire hanging plate 1111 and the connecting plate 1112 are perpendicular to each other and fixedly connected. The wire hanging plate 1111 is a special-shaped plate, and a connecting hole 11111 is provided at the end of its upper edge away from the connecting plate 1112, which is used to connect the diagonal insulator 122. In some application scenarios, the connecting hole 11111 is used to connect the rotating portion 112, and the diagonal insulator 122 is connected through the rotating portion 112; three wire hanging holes 11112 are provided at intervals on the lower edge of the wire hanging plate 1111, two of which are located at the ends of the lower edge of the wire hanging plate 1111, and the other is located in the middle of the lower edge of the wire hanging plate 1111. The horizontal height of the wire hanging hole 11112 located in the middle of the lower edge of the wire hanging plate 1111 is higher than the wire hanging holes 11112 at the ends of the lower edge of the wire hanging plate 1111, so as to hang the split transmission line. In this embodiment, there are three wire hanging holes 11112, which can be used to hang single transmission lines, double-split transmission lines, and triple-split transmission lines, thus expanding its application range and increasing its economic efficiency. In other embodiments, only one, two, or more wire 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 wire hanging holes may also be set to other positions and can be adjusted according to actual usage requirements, as long as the transmission lines do not interfere with each other. There is no specific limitation here.

[0039] 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, the suspension clamp 116 can be hung on any one of the hanging holes 11112 to hang a single transmission line; when there are two suspension clamps 116, the two suspension clamps 116 can be hung on any two of the hanging holes 11112 to hang 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 a triangular structure on the high-voltage end fitting 110, and the three suspension wire clamps 116 are respectively hung on the three hanging holes 11112 for hanging the three-split transmission line. In other embodiments, a combination structure of a T-plate and a U-shaped hanging ring can also be used, with one end of the U-shaped hanging ring connected to the high-voltage end fitting and the other end connected to the T-plate. The two side ends and the bottom end of the T-plate are used to connect the suspension wire clamps for hanging the three-split transmission line. The transmission line is directly suspended on the high-voltage end fitting 110 by the suspension wire clamps 116, without considering the effect of windage on the length of the cross-arm assembly 12. The vertical distance of the cross-arm assembly 12 can also be further shortened, and the tower head layout of the transmission tower 10 is more compact than that of a conventional transmission tower.

[0040] 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 cross-arm assembly 12, that is, when the high-voltage end fitting 110 is installed on the cross-arm 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 from the horizontal plane where the target object is located to the ground is the horizontal height.

[0041] The connecting plate 1112 is a circular plate that is vertically fixed to the end of the hanging plate 1111 away from the connecting hole 11111, and the connection between the hanging plate 1111 and the connecting plate 1112 is located on the first center line of the connecting plate 1112, that is, on a certain radial direction of the plate surface of the connecting plate 1112, so that the high-voltage end hardware 110 is evenly stressed after being installed on the cross-arm assembly 12, avoiding unbalanced loading. The connecting plate 1112 has four mounting holes distributed circumferentially around the center of the connecting plate 1112 for auxiliary connection to the post insulator 121. In certain application scenarios, the connecting plate 1112 can be connected to the rotating part 112 through the four mounting holes provided thereon, and connected to the post insulator 121 through the rotating part 112. Furthermore, two first reinforcing ribs are symmetrically arranged between the hanging plate 1111 and the connecting plate 1112. Both first reinforcing ribs are right-angled triangles and are located on both sides of the hanging plate 1111, that is, the short sides of the two first reinforcing ribs are symmetrically abutted on the second center line of the connecting plate 1112, that is, on the other radial direction of the plate surface of the connecting plate 1112, and the long sides of the first reinforcing ribs are respectively abutted on the two side surfaces of the hanging plate 1111, wherein the second center line is perpendicular to the first center line, and the two first reinforcing ribs are perpendicular to the hanging plate 1111 and the connecting plate 1112. The provision of the first reinforcing ribs 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.

[0042] In one application scenario, referring to FIG3 , the rotating portion 112 is a first rotating portion 113, which is fixedly connected to the connecting plate 1112 of the fixed portion 111 and is located on the side of the connecting plate 1112 away from the wire hanging plate 1111. The first rotating portion 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 size as the connecting plate 1112. The first rotating plate 1131 has four first rotating holes 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 to the four mounting holes on the connecting plate 1112. By inserting matching fasteners such as bolts and nuts through the corresponding first rotating holes and mounting holes, the first rotating plate 1131 and the connecting plate 1112 are fixedly connected, thereby achieving a fixed connection between the first rotating portion 113 and the fixed portion 111. The first rotating block 1132 is a cylindrical block, fixedly connected to the side of the first rotating plate 1131 away from the connecting plate 1112 and located at the center of the first rotating plate 1131. Two second reinforcing ribs are symmetrically disposed between the first rotating block 1132 and the first rotating plate 1131. Both second reinforcing ribs are right-angled trapezoidal plates and are located on either side of the first rotating block 1132. Specifically, the lower edges of the two second reinforcing ribs symmetrically abut the centerline of the first rotating plate 1131, i.e., along a radial direction of the surface of the first rotating plate 1131, while the right-angled sides abut either side of the first rotating block 1132. In other words, the two second reinforcing ribs are perpendicular to each other between the first rotating block 1132 and the first rotating plate 1131. The provision of the second reinforcing ribs enhances the connection strength between the first rotating block 1132 and the first rotating plate 1131. In other embodiments, the first and second reinforcing ribs may be provided with three, four, or more, or may be provided in other shapes, or may not be provided, depending on the specific strength requirements and are not specifically limited herein. In other embodiments, the connecting plate and the first rotating plate may be integrally formed or connected together by welding.

[0043] In another application scenario, referring again to FIG. 2 , the rotating portion 112 is a second rotating portion 114, which is connected to the connecting hole 11111 of the fixed portion 111. The second rotating portion 114 includes two second rotating plates 1141 and a second rotating block 1142. The two second rotating plates 1141 are spaced apart and arranged on the same side of the second rotating block 1142, and the two second rotating plates 1141 are arranged parallel to each other. Each second rotating plate 1141 has a second rotating hole corresponding to the connecting hole 11111, and the two second rotating holes on the two second rotating plates 1141 are arranged coaxially. The second rotating portion 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 coaxial. Then, by inserting mutually cooperating fasteners such as bolts and nuts, the second rotating plates 1141 are fixedly connected to the wire hanging plate 1111, thereby achieving a fixed connection between the second rotating portion 114 and the fixed portion 111. The second rotating block 1142 is a special-shaped block with one flat side and the other arcuate side. The two second rotating plates 1141 are spaced apart and arranged opposite each other on the flat side of the second rotating block 1142. In other embodiments, the second rotating portion may include a second rotating plate and a second rotating block, with the second rotating plate being positioned against one side of the wire hanging plate so that the second rotating hole and the connecting hole are coaxially connected.

[0044] The rotating portion 112 defines a rotating cavity 115. Specifically, both the first rotating portion 113 and the second rotating portion 114 have rotating cavities 115 defined within them. These cavities 115 are rotatably connected to the rotating element 123. In the first rotating portion 113, the rotating cavity 115 is defined within the first rotating block 1132; in the second rotating portion 114, the rotating cavity 115 is defined within the second rotating block 1142. The other end of at least one post insulator 121 and / or at least one diagonal insulator 122 is connected to a rotating element 123. Rotating element 123 rotates within the rotating cavity 115, rotatably connecting the high-voltage end fitting 110 to the high-voltage end of the crossarm assembly 12. When the cross-arm assembly 12 is not installed to the tower body 11, the rotating body 123 can rotate 360° around the axis of the corresponding insulator 120 in the rotating cavity 115, and the angle of the support insulator 121 and / or the inclined insulator 122 can be quickly adjusted to facilitate subsequent installation; when the cross-arm assembly 12 is installed to the tower body 11, the rotating body 123 can rotate at multiple angles in the rotating cavity 115, effectively releasing the unbalanced tension of the transmission line, so that the transmission line can be directly hung on the high-voltage end hardware 110 through the suspension clamp 116, without the need to set a certain length of suspension hardware string at the high-voltage end of the cross-arm assembly to release the unbalanced tension as in the prior art. As a result, the transmission tower 10 can meet the longitudinal force requirements while the tower head layout is more compact, thereby reducing the overall cost.

[0045] In this embodiment, the rotating body 123 is a ball head, and the rotating cavity 115 is a ball socket. Specifically, the other end of at least one post insulator 121 and / or at least one diagonal insulator 122 is connected to a ball head, and a ball socket is defined within the first rotating portion 113 and / or the second rotating portion 114. Specifically, the first rotating block 1132 and / or the second rotating block 1142 are provided with a ball socket, within which the ball head can rotate. 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, and can be designed according to specific needs and are not specifically limited here.

[0046] In this embodiment, the cross-arm assembly 12 is a single-column single-pull structure, and the high-voltage end fitting 110 is connected to a first rotating part 113 and a second rotating part 114. The other ends of the post insulator 121 and the oblique-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 rotationally connected to the first rotating part 113, and the rotating body 123 at the other end of the oblique-pull insulator 122 is rotationally connected to the second rotating part 114, so that the high-voltage end fitting 110 is completely rotationally connected to the cross-arm 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, and correspondingly, only a supporting insulator or a cable-stayed insulator may be provided with a rotating body connected to the other end, so that the high-voltage end fitting is partially rotatably connected to the cross-arm assembly; when the cross-arm assembly is a single-column double-pull, single-column three-pull, double-column double-pull or other structures, one or more first rotating parts and / or second rotating parts may also be provided, and the other end of any one or more insulators may be connected with a rotating body, so that the high-voltage end fitting is partially or completely rotatably connected to the cross-arm assembly. The rotating part of the high-voltage end fitting and the number of rotating bodies of the insulator may be adjusted to match the specific structure of the cross-arm assembly, and no specific restriction is made here.

[0047] The wire hanging plate 1111 of the fixed portion 111 is prepared by a forging process, and the thickness of the edges of the wire hanging plate 1111, the edges of the connecting hole 11111 and the wire hanging hole 11112, and the plate surface at the midline position where the wire hanging hole 11112 is located in the middle are greater than the thickness of the plate surface at other positions of the wire hanging plate 1111, which is convenient for production and processing and improves the mechanical properties of the wire hanging plate 1111. The connecting plate 1112 is prepared by a casting process, which is easy to produce. The wire hanging plate 1111 and the connecting plate 1112 are formed separately and then connected together by welding to form the fixed portion 111. In other embodiments, the wire hanging plate can also be prepared by other processes such as casting, the wire hanging plate can also be set to have a uniform thickness, or the wire hanging plate can also be other shapes, the connecting plate can also be prepared by other processes such as forging, or the connecting plate and the wire hanging plate can also be directly formed into one piece to form the fixed portion. It can be designed according to specific needs and is not specifically limited here.

[0048] In other embodiments, the high-voltage end fitting may not have a rotating portion. The crossarm assembly may include at least one insulator, the other end of which is fixedly connected to the high-voltage end fitting. Specifically, the high-voltage end fitting may include only a fixed portion, the structure of which is as described above and will not be further elaborated. The other end of the insulator is directly fixedly connected to a mounting hole on the connection plate or a connection hole on the wire hanging plate. This allows the high-voltage end fitting to be directly connected to the transmission line, eliminating the need for a hanging fitting string. This further simplifies the high-voltage end fitting structure and reduces manufacturing costs.

[0049] In one application scenario, referring again to Figures 1, 4, and 5, the low-voltage end of the cross-arm 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 via a first connecting assembly 13, and one end of the diagonal insulator 122 is fixedly connected to the tower body 11 via a second connecting assembly 14, thereby ensuring a reliable connection between the cross-arm assembly 12 and the tower body 11.

[0050] 1 and 4 , the first connecting assembly 13 includes a connecting base plate 131 and a connecting lug 132. The connecting lug 132 is fixedly mounted on the connecting base plate 131. The connecting base plate 131 is fixedly connected to the tower body 11, and the connecting lug 132 is fixedly connected to the post insulator 121. The connecting base plate 131 is provided with a plurality of through-holes, and the tower body 11 is provided with a plurality of corresponding through-holes. The connecting base plate 131 and the tower body 11 are fixedly connected by inserting mating fasteners such as bolts and nuts through the corresponding through-holes in the connecting base plate 131 and the tower body 11.

[0051] Furthermore, in order to firmly connect the post insulator 121, four connecting ears 132 are provided on the first connecting assembly 13. The four connecting ears 132 are symmetrically distributed in a cross shape at the center of the connecting base plate 131, and one end of the four connecting ears 132 abuts against each other. The connecting ear 132 is a right-angled trapezoidal plate. The right-angled side of the connecting ear 132 (that is, the right-angled waist of the right-angled trapezoid) is arranged tightly against the connecting base plate 131, and the lower bottom edge abuts against other connecting ears, that is, the lower bottom edges of the four connecting ears 132 abut against each other. While improving the connection strength of the connecting ear 132, the material cost is reduced. The connecting ear 132 is fixed to the connecting base plate 131 by welding. Of course, in other embodiments, the connecting ears can also be two, three or more, as long as the post insulator can be stably connected to the tower body, and no specific limitation is made here.

[0052] 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 close 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 is fixedly connected to the connecting lug 132 via a connector 17, thereby fixing the post insulator 121 to the first connecting assembly 13.

[0053] One end of the cross plug plate 12112 away from the first sleeve 12111 corresponds to the cross top of the connecting ear 132, and the connecting member 17 includes four angle steels arranged back to back. The angle steels include two flat plates connected perpendicularly to each other, and the cross section is L-shaped. Each angle steel is respectively arranged between two adjacent connecting ears 132 and the adjacent plate surfaces of the cross plug plate 12112, that is, the mutually perpendicular flat plates of each angle steel respectively and simultaneously abut the adjacent connecting ears 132 and the adjacent plate surfaces of the cross plug plate 12112, and each angle steel is fixedly connected to the connecting ear 132, the cross plug plate 12112 and the adjacent angle steel, thereby fixedly connecting the first connecting assembly 13 and the post insulator 121. The cross plate 12112 is provided with a plurality of through holes, and the connecting ears 132 are also provided with a plurality of through holes near the locations where the four connecting ears 132 abut each other. The connecting member 17 is also provided with a plurality of through holes at corresponding locations where the connecting ears 132 abut the cross plate 12112. The cross plate 12112 and the connecting ears 132 are fixedly connected by inserting mating fasteners such as bolts and nuts through the corresponding matching through holes on the cross plate 12112, the connecting ears 132, and the connecting member 17. In other embodiments, the connecting member may be two, three, or more angle steels, or may be a connecting plate, or the cross plate, the connecting ears, and the connecting member may be fixedly connected by welding, etc. As long as the cross plate and the connecting ears can be fixedly connected, no specific limitation is imposed herein.

[0054] Furthermore, the connector 17 is provided with multiple through holes, each of which is of uniform shape and size and located at a different position on the connector. Any through hole on the connector 17 can be selected for fixed connection with the through holes provided on the cross plate 12112 and the connecting lug 132. If, in one case, the through holes on the connector 17 used to connect the cross plate 12112 and the connecting lug 132 are defined as a group of through holes, the through holes on the connector 17 can be divided into multiple groups, each of which can be used to fixedly connect the cross plate 12112 and the connecting lug 132. This allows for adjustable relative distance between the cross plate 12112 and the connecting lug 132, increasing installation redundancy, reducing installation difficulty, and improving installation efficiency.

[0055] 1 and 5 , the second connection assembly 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 to the oblique-stayed insulator 122 . One end of the second sub-connecting fitting 142 is adjustable and connected to the first sub-connecting fitting 141 , and the other end is used to connect to the tower body 11 , thereby achieving a fixed connection between the oblique-stayed insulator 122 and the tower body 11 .

[0056] The first sub-connecting hardware 141 is a fan-shaped flat-angle hardware, which is provided with several arc-shaped mounting parts 1411. 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 U-shaped rings 1421. The combination of multiple mounting parts 1411 and multiple U-shaped rings 1421 can make the distance and relative angle between the tower body 11 and the inclined insulator 122 adjustable, increase the redundancy of the installation, reduce the difficulty of installation, and improve the installation efficiency.

[0057] The diagonal insulator 122 is fixedly connected to the first sub-connecting fitting 141 via fasteners. A U-shaped slot fitting 1221 is provided at one end of the diagonal insulator 122. Both sides of the U-shaped slot fitting 1221 have through-holes, and corresponding through-holes are provided on the first sub-connecting fitting 141. Fasteners such as bolts and nuts that fit together are inserted through the through-holes of the first sub-connecting fitting 141 and the U-shaped slot fitting 1221, thereby securing the first sub-connecting fitting 141 to the U-shaped slot fitting 1221. In other embodiments, the plurality of mounting portions may be arranged in a straight line along the extension direction of the diagonal insulator, or the second sub-connecting fitting may be connected to the diagonal insulator while the first sub-connecting fitting is connected to the tower body. This is not a specific limitation.

[0058] In another application scenario, referring to Figures 6-8 , the low-voltage end of the cross-arm assembly 12 is rotatably connected to the tower body 11. One end of a post insulator 121 is connected to the tower body 11 via a first hinge assembly 15, allowing it to rotate horizontally. One end of a diagonal insulator 122 is connected to the tower body 11 via a second hinge assembly 16, allowing it to rotate horizontally. This further relieves unbalanced tension, reduces the force on the cross-arm assembly 12, and ultimately reduces the size and cost of the cross-arm assembly 12.

[0059] Referring to 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 support insulator 121. The first hinge support 151 and the first hinge member 152 are rotatably connected via a first hinge axis. The first hinge support 151 includes a first hinge base plate 1511 and two first hinge side plates 1512 spaced apart and arranged opposite to each other. The first hinge base plate 1511 is provided with a plurality of through holes, and the tower body 11 is provided with a plurality of corresponding through holes. By inserting matching bolts, nuts and other fasteners through the corresponding through holes in 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 fixed to the first hinge base plate 1511 at intervals, and the plate surfaces of the two first hinge side plates 1512 are flush with each other. The first hinge 152 is provided with a first hinge portion 1521 and a U-shaped portion 1522. The first hinge portion 1521 is a columnar structure. The first hinge portion 1521 is provided between the two first hinge side plates 1512. The first hinge portion 1521 is provided with a through hole along its axial direction. By passing a first hinge shaft and other rotating parts through the through holes of the two first hinge side plates 1512 and the through holes of the first hinge 152, the rotation connection between the first hinge 152 and the first hinge support 151 is realized.

[0060] The post insulator 121 is fixedly connected to the first hinge 152 via fasteners. A second flange 1212 is provided at the end of the post insulator 121 near the tower body 11. The second flange 1212 includes a second sleeve 12121 and a plug plate 12122. The second sleeve 12121 is fixedly connected to one end of the post insulator 121. The plug plate 12122 is fixedly disposed at the end of the second sleeve 12121 away from the post insulator 121. The plug plate 12122 has a through hole. The U-shaped member 1522 of the first hinge 152 is connected to the end of the first hinge 1521 away from the first support 151. The two plates of the U-shaped member 1522 have corresponding through holes. Fasteners such as bolts and nuts are inserted through the corresponding through holes on the plug plate 12122 and the U-shaped member 1522 to securely connect the plug plate 12122 and the U-shaped member 1522. In other embodiments, the plug plate and the U-shaped member may also be fixedly connected by welding or other methods, which is not specifically limited here.

[0061] Referring to Figure 8 , 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 diagonal insulator 122. The second hinge support 161 and the second hinge member 162 are rotatably connected via a second hinge axis. The second hinge support 161 includes a second hinged base plate 1611 and two second hinged side plates 1612 spaced apart and opposed to each other. Its specific structure is similar to that of the first hinge support 151 and will not be further described here. The second hinged member 162 includes a second hinged portion 1621 and an arc-shaped plate 1622. The second hinged portion 1621 is a columnar structure. The second hinged portion 1621 is arranged between the two second hinged side plates 1612. The second hinged portion 1621 is provided with a through hole along its axial direction. By passing a second hinge shaft or other rotating parts through the through holes of the two second hinged side plates 1612 and the through holes of the second hinged member 162, the rotational connection between the second hinged member 162 and the second hinged support 161 is realized.

[0062] The oblique-pull insulator 122 is fixedly connected to the second hinge assembly 16 via the second connecting assembly 14. The specific structure of the second connecting assembly 14 and the connection method between the oblique-pull insulator 122 and the second connecting assembly 14 are described above and will not be repeated here. The second connecting assembly 14 and the second hinge assembly 16 are fixedly connected by inserting matching bolts and nuts through corresponding through-holes in the U-shaped ring 1421 of the second connecting assembly 14 and the curved plate 1622 of the second hinge 162.

[0063] In this embodiment, the axis of the support insulator 121 is set horizontally, which is convenient for the installation of the high-voltage end fitting 110 and the stringing of the wires. When the high-voltage end fitting 110 suspends two or more conductors, it is usually necessary to make two of the conductors at the same horizontal height. When the horizontally set support insulator 121 is connected to the high-voltage end fitting 110, there is no need to consider the installation angle of the high-voltage end fitting 110 during the design. The high-voltage end fitting 110 can be directly installed horizontally for hanging the wires, which is simple to design and install. In other embodiments, the axis of the support insulator can also be tilted upward relative to the horizontal direction. The specific tilt angle is designed according to the needs. It is only necessary to adjust the installation angle of the high-voltage end fitting accordingly to make the suspended wire meet the requirements. When the same load is mounted, the support insulator set obliquely is subjected to less stress than the support insulator set horizontally. When the same load is mounted, the support insulator set obliquely can choose an insulator with a smaller specification, which ensures safety while improving economy.

[0064] In this embodiment, the rotational axes of post insulator 121 and diagonal insulator 122 are collinear and vertically aligned. When longitudinal unbalanced tension occurs in the conductors on either side of the crossarm assembly 12, post insulator 121 and diagonal insulator 122 can deflect horizontally, causing parameters such as the conductor span (the horizontal distance between the conductor suspension points on two adjacent transmission towers) to change. When deflected to the appropriate position, the tension in the conductors reaches a new equilibrium, effectively relieving the longitudinal unbalanced tension.

[0065] In other embodiments, the rotation axis can also be tilted relative to the vertical direction, and the tilt angle of the rotation axis can be designed according to the needs, and it is only necessary to adjust the connection structure of the transmission tower accordingly. Since the rotation trajectory of the high-voltage end of the cross-arm assembly is a circular arc trajectory with a vertical distance from the high-voltage end to the rotation axis as a radius in a rotation plane perpendicular to the rotation axis. For a vertically set rotation axis, its high-voltage end rotates in a horizontal rotation plane and does not move upward in the vertical direction; when the rotation axis is tilted relative to the vertical direction, the rotation plane perpendicular to it will tilt upward relative to the horizontal direction, so that when the support insulator and the diagonal insulator rotate around the tilted rotation axis, the high-voltage end will tend to move upward, that is, when the support insulator and the diagonal insulator do not rotate, the high-voltage end is in a stationary state and is at the lowest point; when the support insulator and the diagonal insulator rotate relative to the tower body, the high-voltage end moves upward. The high-voltage end of the cross-arm assembly bears the vertical downward load due to the gravity of the mounted conductor and the cross-arm assembly itself, which can suppress the upward movement of the high-voltage end and then suppress the continued rotation of the cross-arm assembly, thereby preventing the cross-arm assembly from rotating too much and causing insufficient electrical clearance between the conductor and the tower body, until the support insulator and the inclined insulator stop rotating and the cross-arm assembly reaches a balanced state.

[0066] In another embodiment, the crossarm assembly includes a post insulator and at least two diagonal insulators. Specifically, the number of diagonal insulators can be two, three, or more. One end of the post insulator and the at least two diagonal insulators are connected to the tower body of the transmission tower. Their other ends are connected together via high-voltage end fittings to form a crossarm assembly for suspending the end of the transmission line.

[0067] When there are two or more diagonal insulators, the cross-arm assembly corresponds to a single-post, double-post, single-post, triple-post, or other structure, with multiple diagonal insulators arranged at intervals around the post insulator. When the cross-arm assembly adopts a single-post, double-post structure, the two diagonal insulators are located above the post insulator, and the angle between the post insulator and the diagonal insulator ranges from 15° to 45°, for example, 15°, 30°, or 45°. When the cross-arm assembly is a single-column three-pull structure, the axes of the two oblique insulators and the axis of the post insulator are in the same plane, and the two oblique insulators are defined as first oblique insulators, and the remaining oblique insulators are defined as second oblique insulators. The distances between the second oblique insulators and the two first oblique insulators are equal, and the angle between the two first oblique insulators ranges from 45° to 90°, for example, 45°, 60° or 90°, and the angle between the second oblique insulator and the post insulator ranges from 25° to 45°, for example, 25°, 30°, 35° or 45°.

[0068] The high-voltage end fitting is provided with a corresponding first rotating portion and at least two second rotating portions. The number of second rotating portions is the same as the number of diagonal insulators. The other end of the post insulator is rotatably connected to the first rotating portion, and the other ends of at least two diagonal insulators are rotatably connected to the second rotating portions. It should be noted that regardless of whether the number of diagonal insulators is one, two, three, or more, the connection relationship between them and the high-voltage end fitting is universal.

[0069] In another embodiment, the cross-arm assembly includes two post insulators and two diagonal insulators, i.e., the cross-arm assembly has a dual-post, dual-pull structure. One end of each of the two post insulators and the two diagonal insulators is connected to the body of the transmission tower, and the other ends are connected together via high-voltage end fittings to form a cross-arm assembly for suspending the end of the transmission line. The two diagonal 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°, and the angle between the post insulator and the adjacent diagonal insulator ranges from 15° to 45°, for example, 15°, 30°, or 45°. The arrangement of the two post insulators and the two diagonal insulators creates a stable triangular structure between the cross-arm assembly and the body of the transmission tower, significantly improving the stability of the cross-arm assembly.

[0070] The high-voltage end fittings are correspondingly provided with two first rotating parts and two second rotating parts. The other ends of the two post insulators are rotationally connected to the two first rotating parts respectively, and the other ends of the two oblique-pull insulators are rotationally connected to the two second rotating parts respectively.

[0071] In another embodiment, the crossarm assembly can be equipped with no diagonal 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 connected to the transmission tower body, and the other end is directly connected to the high-voltage end fitting, serving as the crossarm assembly for hanging the end of the transmission line. The high-voltage end fitting only has a first rotating portion, and the other end of the post insulator is rotatably connected to the first rotating portion.

[0072] The beneficial effects of the present application are as follows: different from the prior art, the high-voltage end of the cross-arm assembly is connected to the high-voltage end hardware, which has a simple structure and can effectively release the unbalanced tension of the transmission line. There is no need to release the unbalanced tension through a certain length of suspension hardware string, so that the transmission line can be directly hung on the high-voltage end hardware through the suspension wire clamp, thereby making the transmission tower meet the longitudinal force requirements while the tower head arrangement is more compact, thereby reducing the overall cost.

[0073] At the same time, the low-pressure end of the cross-arm assembly is connected to the tower body in a rotational manner, which can further release the unbalanced tension, reduce the stress on the cross-arm assembly, and thus reduce the specifications of the cross-arm assembly and further reduce costs.

[0074] In addition, the high-voltage end fittings provided in this application can be used to hang single transmission lines, double-split transmission lines, and triple-split transmission lines, with a wider range of applications and higher economy.

[0075] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

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