Quick-assembly composite insulating cross arm and quick-assembly double cross arm structure

Abstract

The utility model relates to insulating cross arm technical field, concretely relates to a quick -wearing composite insulating cross arm and quick -wearing double cross arm structure. Composite insulating cross arm, including, the low -voltage hardware and high -voltage hardware and tower connecting hardware of cross arm main part being located at the both ends of cross arm main body, and the through -hole of vertical being equipped with in low -voltage hardware another end through low -voltage hardware, the tower connecting hardware one end is through the first blind hole and is equipped in low -voltage hardware another end, and the two groups of installation through -hole of axial vertical are equipped on tower connecting hardware, and each group of installation through -hole includes two coaxial communication installation hole of first blind hole, the through -hole can be communicated with any group of installation through -hole, and the through -hole is used for the bolted connection low -voltage hardware and tower connecting hardware after communicating with a group of installation through -hole, and the tower connecting hardware includes the straight plate type or arc connecting plate for connecting the tower of being located at another end connecting plate. Through the through -hole can select a group of installation through -hole and use a group of bolted connection, and the installation tower connecting hardware of phase can be selected, and it is convenient to quick -wearing, and it has higher versatility.

Description

Technical Field

[0001] This utility model relates to the field of insulating crossarm technology, specifically to a quick-install composite insulating crossarm and a quick-install double crossarm structure. Background Technology

[0002] In power transmission lines, the use of composite crossarm insulators can significantly reduce tower load and narrow the line corridor, thereby lowering the construction cost of transmission lines. Simultaneously, because the conductor can be directly suspended at the end of the composite insulated crossarm, it reduces conductor sway in strong winds and avoids the conductor flashover problems caused by traditional suspension insulators. Conventional crossarms use flange structures at the ends, bolted to the tower or connecting components with multiple sets of bolts. This multiple-bolt connection method limits the installation efficiency of composite insulated crossarms, leading to longer power outage times and delayed power restoration during operation and maintenance. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned background technology and provide a quick-install composite insulating crossarm and a quick-install double crossarm structure.

[0004] The technical solution adopted in this utility model is: a quick-installation composite insulating crossarm, comprising, A crossbeam body, the crossbeam body comprising a plurality of umbrella skirts spaced apart along its axial direction; The low-pressure fitting has one end pressed into one end of the crossarm body and the other end radially arranged with a through hole penetrating the low-pressure fitting. The connecting tower fitting has a first blind hole at one end, through which it is fitted onto the other end of the low-pressure fitting. The connecting tower fitting has two sets of axially perpendicular mounting holes spaced circumferentially. Each set of mounting holes includes two coaxial mounting holes that connect to the first blind hole. The through hole can be connected to any set of mounting holes, and after the through hole is connected to a set of mounting holes, it is used to pass a bolt to bolt the low-pressure fitting to the connecting tower fitting. The connecting tower fitting includes a connecting plate at the other end. The connecting plate has a straight plate structure or an arc plate structure, and the axis of the straight plate or arc plate is perpendicular to the axis of the set of mounting holes. High-voltage fittings are located at the other end of the crossarm body.

[0005] Furthermore, one end of the low-voltage fitting is provided with a second blind hole, and one end of the crossarm body is pressed into the second blind hole; the crossarm body includes an insulating inner core, a waterproof sheath covering the insulating inner core, and a plurality of umbrella skirts provided outside the sheath; the second blind hole of the low-voltage fitting is pressed into the end of the insulating inner core covering the sheath.

[0006] Furthermore, the sheath is made of insulating material; the insulating core comprises glass fiber resin or carbon fiber resin or basalt fiber resin or insulating material filled with epoxy glass fiber hollow tube material.

[0007] Furthermore, the low-voltage fitting is pressed onto the end of the insulating inner core; a sealing ring is provided between the inner wall of the second blind hole and the sheath.

[0008] Furthermore, one end of the low-pressure fitting is provided with an annular groove on the inner wall of the second blind hole. The annular groove is smaller at the end closer to the crossarm body and larger at the end farther away from the crossarm body. The sealing ring is adapted to be installed in the annular groove.

[0009] Furthermore, the cross-section of the annular groove has a stepped structure with a larger outer diameter at one end away from the main body of the crossbeam and a smaller outer diameter at the other end; the cross-section of the sealing ring has a stepped structure adapted to the annular groove.

[0010] Furthermore, the low-pressure fitting is provided with a positioning mark, and the connecting tower fitting is provided with an alignment mark corresponding to two sets of mounting holes in its axial direction. When the through hole connects to a set of mounting holes, the positioning mark points to a pair of alignment marks.

[0011] Furthermore, both the positioning mark and the alignment mark are bar lines.

[0012] Furthermore, the connection structure of the high-voltage fitting installed on the crossarm body is the same as the connection structure of the low-voltage fitting connected to the crossarm body; a sealing ring is provided between the high-voltage fitting and the sheath.

[0013] Furthermore, the low-pressure fitting has a stepped shaft structure, with the narrow end of the stepped shaft serving as an insertion section for inserting into the first blind hole; a through hole is provided on the insertion section, and when the end face of the connecting tower fitting abuts against the shoulder of the stepped shaft, the axes of the two sets of mounting holes and the axis of the through hole are on the same plane.

[0014] Furthermore, a hanging wire fitting is provided at the end of the high-voltage fitting away from the main body of the crossarm, and a tie rod is connected to the hanging wire fitting at an angle to the main body of the crossarm.

[0015] Another aspect of this utility model provides a quick-installation double crossarm structure, including two composite insulated crossarms. The composite insulated crossarm includes a crossarm body, low-voltage fittings and high-voltage fittings located at both ends of the crossarm body, and a connecting tower fitting located on the low-voltage fitting. One end of the low-voltage fitting is located at one end of the crossarm body, and the other end has a through hole that penetrates the low-voltage fitting. One end of the connecting tower fitting has a first blind hole, and it is sleeved on the other end of the low-voltage fitting through the first blind hole. The connecting tower fitting has two sets of axially perpendicular mounting holes spaced circumferentially, and each set of mounting holes includes two coaxial mounting holes that connect to the first blind hole. The through hole can be connected to any set of mounting holes, and after the through hole is connected to a set of mounting holes, it is used to pass a bolt to bolt the low-voltage fitting to the tower fitting; the tower fitting includes a connecting plate located at the other end; the two composite insulating crossarms are set at an angle, and their high-voltage fittings are fixed to the hanging fitting, and a tie rod is connected to the hanging fitting; the hanging fitting includes two connecting cylinders, the connecting cylinders are sleeved on one end of the high-voltage fitting, and the connecting cylinders are provided with two sets of vertical mounting holes; one end of the high-voltage fitting is provided with a through hole, and after the through hole is connected to any set of mounting holes, it is used to insert a bolt to bolt the connecting cylinder and the high-voltage fitting.

[0016] The beneficial effects of this utility model include: 1. The crossarm body is equipped with low-voltage and high-voltage fittings at both ends. The low-voltage fitting is inserted into the first blind hole of the tower connecting fitting. After connecting any set of installation holes through the through hole, a bolt can be passed through and a nut can be screwed in to bolt the low-voltage fitting to the tower connecting fitting. The connection is reliable and facilitates quick installation. The axes of the two sets of installation holes are perpendicular, which facilitates selective adjustment of the angle of the tower connecting fitting to adapt to horizontal and vertical poles and towers, improving versatility and flexibility. The connecting plate includes a straight plate or an arc plate, which is easy to adapt to the mounting plate of the pole or tower. Multiple umbrella skirts can increase the insulation at both ends of the crossarm to prevent flashover. 2. The low-voltage fittings are fixedly connected to the end of the insulating inner core covering sheath of the crossarm body through the second blind hole; 3. The sealing ring can seal the low-voltage fittings and the crossarm body to prevent water from entering through the connection and wetting the insulating core, which would reduce the insulation performance of the composite insulated crossarm. 4. The sealing ring can be inserted and limited by the annular groove on the low-pressure fitting, which is small at one end and large at the other. After inserting the insulating core rod into the first blind hole, the sealing ring is pressed to prevent it from being squeezed out during the pressing process and affecting the sealing performance. 5. The stepped cross-section of the annular groove allows for the installation and positioning of the sealing ring, and provides a limiting effect on the sealing ring during press fitting; 6. Circumferential positioning can be achieved by using the positioning marks on the low-voltage fittings and the alignment marks on the connecting tower fittings, which facilitates quick alignment of the connecting through hole with the required set of installation through holes. 7. The bar-shaped structure is simple and facilitates precise alignment; 8. The low-pressure fitting has a stepped shaft structure. When inserted into the first blind hole, the end face of the connecting tower fitting can be axially positioned when it abuts against the shaft shoulder. After the low-pressure fitting is inserted into the first blind hole and the shaft shoulder abuts against the limit, the connecting tower fitting can be rotated to connect the through hole and the bolt can be inserted. It is easy to use. 9. The high-voltage fittings with connecting wires can be used to install power transmission lines, and the tie rods can improve the stability of the crossarm installed on the tower. 10. The double crossarm structure connects the crossarms to the hanging hardware through two angled composite insulated crossarms. The hanging hardware is then connected by a tie rod, which can improve the stability of the crossarms on the tower and strengthen the tensile strength of the installed transmission line. The high-voltage hardware and the hanging hardware are matched and connected by through holes and two sets of installation through holes, and then bolts are inserted for fastening, which facilitates quick installation.

[0017] This utility model relates to a quick-installation composite insulating crossarm. The low-voltage fitting at one end of the crossarm body is inserted into the first blind hole of the tower connecting fitting. The crossarm is connected to any set of installation holes through the through hole. A bolt can be inserted into one side of the low-voltage fitting, passed through the through hole to the other side, and then screwed with a nut. This allows for quick installation of the low-voltage fitting and the tower connecting fitting. It is also convenient to selectively adjust the angle of the tower connecting fitting to adapt to horizontal and vertical towers, improving versatility and ease of use. Attached Figure Description

[0018] Figure 1 : A schematic diagram of an embodiment of a quick-install composite insulating crossarm; Figure 2 : A schematic diagram of the structure in which low-pressure fittings and connecting tower fittings are connected by bolts; Figure 3 A cross-sectional structural schematic diagram of an embodiment of a quick-install composite insulating crossarm; Figure 4 :for Figure 3 A magnified structural diagram of part A in the diagram; Figure 5 This is a schematic diagram of the structure before the low-pressure fittings are press-fitted into the main body of the crossarm; Figure 6 : Schematic diagram of the quick-installation double crossarm structure; The components are: 1-Crossarm body; 11-Insulating inner core; 12-Sheath; 13-Umbrella skirt; 2-Low voltage fitting; 21-Through hole; 22-Second blind hole; 23-Annular groove; 24-Installation section; 25-Positioning mark; 3-Tower connecting fitting; 31-First blind hole; 32-Installation through hole; 33-Connecting plate; 34-Alignment mark; 4-High voltage fitting; 5-Tie rod; 6-Hanging fitting; 7-Sealing ring; 8-Bolt. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary. The drawings are not drawn to scale and are intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] The crossarm uses a flange structure and is connected by multiple sets of bolts 8, which ensures the connection strength, but the installation efficiency is low and the use is inconvenient. In addition, the crossarm is installed on the pole. Some are directly installed on the utility pole and require a connection structure similar to a clamp. Others are installed on the transmission tower. The mounting parts on the transmission tower are horizontal or vertical plate structures. When installing the crossarm, the connecting plate 33 of the crossarm tower connecting hardware 3 needs to be compatible with the mounting parts of the transmission tower.

[0024] Example 1 This utility model relates to a quick-installation composite insulated crossarm for connecting power transmission lines on poles. The crossarm body 1 has low-voltage fittings 2 and high-voltage fittings 4 at both ends. The low-voltage fitting 2 is inserted into the first blind hole 31 of the tower connecting fitting 3. After passing through the through hole 21 and connecting to any set of mounting holes 32, a bolt 8 can be passed through and a nut can be screwed in to bolt the low-voltage fitting 2 to the tower connecting fitting 3. The connection is reliable and facilitates quick installation. The axes of the two sets of mounting holes 32 are perpendicular, which facilitates selective adjustment of the angle of the tower connecting fitting 3 to adapt to horizontally and vertically arranged poles, improving versatility and flexibility. The connecting plate 33 includes a straight plate or an arc-shaped plate structure, which is easy to adapt and bolt to the mounting plate of the pole or tower. Multiple umbrella skirts 13 can increase the insulation at both ends of the crossarm and prevent flashover.

[0025] A quick-install composite insulating crossarm, specifically, such as Figure 1-6 As shown, the device includes a crossarm body 1, low-voltage fittings 2 and high-voltage fittings 4 located at both ends of the crossarm body 1, and a connecting tower fitting 3. The crossarm body 1 includes multiple umbrella skirts 13 spaced apart along its axial direction. One end of the low-voltage fitting 2 is located (pressed) onto one end of the crossarm body 1, and the other end has a through hole 21 perpendicularly penetrating the low-voltage fitting 2. The through hole 21 is arranged radially to penetrate the low-voltage fitting 2. One end of the connecting tower fitting 3 has a first blind hole 31, which is fitted onto the other end of the low-voltage fitting 2. The connecting tower fitting 3 has two sets of axially perpendicular mounting brackets spaced circumferentially. The perforation 32, each set of mounting perforations 32 includes two coaxial mounting holes that connect to the first blind hole 31; the through hole 21 can be connected to any set of mounting perforations 32, and after the through hole 21 is connected to a set of mounting perforations 32, it is used to pass through the bolt 8 to bolt the low-voltage fitting 2 to the tower fitting 3. The tower fitting 3 includes a connecting plate 33 located at the other end. The connecting plate 33 includes a straight plate structure or an arc plate structure. The axis of the straight plate or arc plate is perpendicular to the axis of a set of mounting perforations 32; the high-voltage fitting 4 is located at the other end of the crossarm body 1 and is used to connect the hanging fitting 6. In use, the tower connector 3 is inserted into one end of the low-voltage connector 2. According to the installation requirements of the phase of the tower adapter connecting plate 33, the tower connector 3 is rotated so that the through hole 21 is connected to the required set of installation through holes 32. The bolt 8 is inserted from one side of the tower connector 3 through the through hole 21 to the other side. The nut is used to screw the bolt 8 on the other side to connect the tower connector 3 to the pressure fitting. Only one set of bolts 8 and nuts is needed to connect the low-voltage connector 2 to the tower connector 3. At the same time, the phase of the connecting plate 33 can be adjusted to match the tower, which is convenient for quick installation and has versatility such as height adjustment.

[0026] In one embodiment, such as Figure 1-3As shown, the low-voltage fitting 2 has a second blind hole 22 at one end, and the crossarm body 1 is fixed (crimped) into the second blind hole 22 at one end. The crossarm body 1 includes an insulating inner core 11, a sheath 12 covering the insulating inner core 11, and multiple umbrella skirts 13 located outside the sheath 12. The low-voltage fitting 2 is fixedly fitted onto the end of the insulating inner core 11 covering the sheath 12 through the second blind hole 22. Both the sheath 12 and the umbrella skirts 13 are made of insulating material. The sheath 12 can be made of silicone rubber. Preferably, the insulating inner core 11 includes glass fiber resin, carbon fiber resin, basalt fiber resin, or insulating material filled with epoxy glass fiber hollow tube material.

[0027] Based on the fact that one end of the low-pressure fitting 2 is provided with a second blind hole 22, such as Figure 3-4 As shown, the low-voltage fitting 2 is crimped to the end of the insulating core 11 covering the sheath 12; a sealing ring 7 is provided between the inner wall of the second blind hole 22 and the sheath 12. The sealing ring 7 can seal the connection between the low-voltage fitting 2 and the crossarm body 1, preventing water from entering through the connection and wetting the insulating core 11, which would reduce the insulation performance of the composite insulating crossarm.

[0028] A sealing ring 7 is provided between the inner wall of the second blind hole 22 and the sheath 12, such as Figure 4-5 As shown, the low-pressure fitting 2 has an annular groove 23 on the inner wall of the second blind hole 22 at one end. The end of the annular groove 23 closer to the crossarm body 1 (umbrella skirt 13) is smaller, and the end farther away from the crossarm body 1 is larger. The sealing ring 7 is adapted to be installed in the annular groove 23. The annular groove 23 is larger at one end and smaller at the other end. After the insulating core rod is inserted into the first blind hole 31, it is pressed to prevent the sealing ring 7 from being squeezed out during the pressing process and affecting the sealing performance.

[0029] Based on the fact that the low-pressure fitting 2 is provided with an annular groove 23, such as Figure 5 As shown, the cross-section of the annular groove 23 has a P-shaped structure with a larger outer diameter at one end away from the main body 1 (umbrella skirt 13) and a smaller outer diameter at the other end; the cross-section of the sealing ring 7 has a P-shaped structure that fits the annular groove 23 before pressing. The P-shaped structure can be a stepped structure, which can install and position the sealing ring 7 and limit the sealing ring 7 during pressing.

[0030] In some embodiments, such as Figure 1As shown, the low-pressure fitting 2 is provided with a positioning mark 25, and the connecting fitting 3 is provided with an alignment mark 34 corresponding to the two sets of mounting holes 32 in its axial direction. When the through hole 21 connects to a set of mounting holes 32, the positioning mark 25 points to the corresponding alignment mark 34. The alignment mark 34 is provided at the end of the connecting fitting 3, and the positioning mark 25 is provided on the low-pressure fitting 2 near the insertion section 24 of the first blind hole 31. Through the positioning mark on the low-pressure fitting 2 and the alignment mark 34 on the connecting fitting 3, circumferential positioning can be performed, which facilitates quick alignment and connection of the through hole 21 with the required set of mounting holes 32. When the insertion section 24 of the low-pressure fitting 2 is a hollow structure, the through hole 21 consists of two coaxial through sub-holes.

[0031] Based on the positioning mark 25 on the low-voltage fitting 2, such as Figure 1 As shown, both the positioning mark 25 and the alignment mark 34 are bar lines. When the alignment mark 34 and the positioning mark 25 are on the same straight line, the set of mounting holes corresponding to the alignment mark 34 are connected to the through holes, which are suitable for inserting bolts 8. The structure is simple and facilitates precise alignment.

[0032] In a preferred embodiment, the high-voltage fitting 4 is installed in the same connection structure as the low-voltage fitting 2 on the crossarm body 1; that is, one end of the high-voltage fitting 4 is press-fitted onto the end of the insulating core 11 covering the sheath 12; a sealing ring 7 is provided between the high-voltage fitting 4 and the sheath 12.

[0033] In one embodiment, such as Figure 2-3 As shown, the low-pressure fitting 2 has a stepped shaft structure, with the narrow end of the stepped shaft serving as the insertion section 24 for inserting into the first blind hole 31. A through hole 21 is located on the insertion section 24. When the end face of the connecting fitting 3 abuts against the shoulder of the stepped shaft, the axes of the two sets of mounting holes 32 are on the same plane as the axis of the through hole 21. Preferably, the low-pressure fitting 2 is a cylindrical stepped shaft, and one end of the connecting fitting 3 is a circular tube, with the outer diameter of the tube matching the outer diameter of the stepped shaft near the insertion section of the low-pressure fitting 2. The stepped shaft structure of the low-pressure fitting 2 allows for axial positioning when the end face of the connecting fitting 3 abuts against the shoulder during insertion into the first blind hole 31. After the low-pressure fitting 2 is inserted into the first blind hole 31 and limited by the shoulder, rotating the connecting fitting 3 connects the through hole 21 to the required set of mounting holes 32, allowing for the insertion of the bolt 8. This design is convenient to use.

[0034] In one embodiment, such as Figure 6 As shown, a hanging hardware 6 is provided at the end of the high-voltage fitting 4 away from the crossarm body 1, and a tie rod 5 is connected to the hanging hardware 6 at an angle to the crossarm body 1. The hanging hardware 6 connected to the high-voltage fitting 4 can be used to install power transmission lines, and the connection to the tower via the tie rod 5 can improve the stability of the crossarm installed on the tower.

[0035] In actual use, the insulating inner core 11 is covered with an insulating sheath 12, and multiple umbrella skirts 13 are spaced apart along the axial direction of the insulating inner core 11 on the sheath 12; one end of the insulating inner core 11 is inserted into the second blind hole 22 of the low-voltage fitting 2 and pressed into the low-voltage fitting 2, and a sealing ring 7 is provided between the inner wall of the second blind hole 22 and the sheath 12; the connecting tower fitting 3 is a stepped shaft structure, and its narrow end insertion section 24 is inserted into the first blind hole 31 of the connecting tower fitting 3. When the end face of the connecting tower fitting 3 abuts against the shoulder of the stepped shaft, the axis of the through hole 21 is on the same plane as the axis of the two sets of mounting holes 32. The insertion section 24 is provided with the through hole 21, and the connecting tower fitting 3 is provided with two sets of mounting holes 32 with perpendicular axes. Each set of mounting holes 32 includes a connecting... The first blind hole 31 has two coaxial mounting holes. The tower connecting hardware 3 has linear alignment marks 34 corresponding to each set of mounting through holes 32 in its axial direction. The low-voltage hardware 2 has linear positioning marks 25 corresponding to the through hole 21 in its axial direction. When the positioning mark 25 and a set of alignment marks 34 point to each other, the through hole 21 connects to the set of mounting through holes 32 corresponding to the set of alignment marks 34. According to the installation structure and phase of the tower, the phase of the tower connecting hardware 3 is adjusted and connected to the low-voltage hardware 2. That is, a set of mounting through holes 32 that are suitable for installation is selected and connected to the through hole 21. The bolt 8 is inserted from one side of the tower connecting hardware 3 into the mounting hole, through the through hole 21 to the other side, and then the bolt 8 is screwed in with a nut to quickly connect the tower connecting hardware 3 and the low-voltage hardware 2.

[0036] Example 2 Another aspect of this utility model is to provide a quick-installation double crossbeam structure, such as... Figure 6As shown, the device includes two composite insulated crossarms. Each composite insulated crossarm includes a crossarm body 1, low-voltage fittings 2 and high-voltage fittings 4 located at both ends of the crossarm body, and a connecting bracket fitting 3 located on the low-voltage fitting 2. One end of the low-voltage fitting 2 is located at one end of the crossarm body 1, and the other end has a through hole 21 perpendicularly penetrating the low-voltage fitting 2. The through hole 21 can be radially arranged on the low-voltage fitting 2. One end of the connecting bracket fitting 3 has a first blind hole 31, which is sleeved on the other end of the low-voltage fitting 2. The connecting bracket fitting 3 has two sets of axially perpendicular mounting holes 32 spaced circumferentially. Each set of mounting holes 32 includes two coaxial mounting holes that connect to the first blind hole 31. The through hole 21 can be connected to any set of mounting holes 32 and penetrate through... After the through hole 21 is connected to a set of mounting through holes 32, it is used to pass through bolts 8 to bolt the low-voltage fitting 2 to the tower fitting 3; the tower fitting 3 includes a connecting plate 33 located at the other end; the connecting plate 33 includes a straight plate structure or an arc plate structure, and the axis of the straight plate or arc plate is perpendicular to the axis of a set of mounting through holes 32; two composite insulating crossarms are set at an angle, and their high-voltage fittings 4 are fixed to the hanging fitting 6, and a tie rod 5 is connected to the hanging fitting 6; the hanging fitting 6 includes two connecting cylinders, the connecting cylinders are sleeved on one end of the high-voltage fitting 4, and the connecting cylinders are provided with two sets of vertical mounting through holes 32; one end of the high-voltage fitting 4 is provided with a through hole 21, which is connected to any set of mounting through holes 32 and used to insert bolts 8 to bolt the connecting cylinder and the high-voltage fitting 4. The double crossarm structure is connected to the hanging hardware 6 by two composite insulated crossarms at an angle. The hanging hardware 6 is then connected by a tie rod 5, which can improve the stability of the crossarm on the tower and strengthen the tensile strength of the installed transmission line. The high-voltage hardware 4 and the hanging hardware 6 are also matched and connected by through holes 21 and two sets of installation through holes 32, and then bolted by bolts 8 for easy and quick installation.

[0037] In an optional embodiment, the low-voltage fitting 2 has a second blind hole 22 at one end, and the crossarm body 1 is fixedly disposed within the second blind hole 22 at one end. The crossarm body 1 includes an insulating inner core 11, a sheath 12 covering the insulating inner core 11, and a plurality of umbrella skirts 13 disposed outside the sheath 12. The low-voltage fitting 2 is fixedly fitted onto the end of the insulating inner core 11 covering the sheath 12 through the second blind hole 22. Both the sheath 12 and the umbrella skirts 13 are made of insulating material. Preferably, the insulating inner core 11 includes glass fiber resin or carbon fiber resin material.

[0038] In an optional embodiment, the low-voltage fitting 2 is crimped onto the end of the insulating core 11 covering the sheath 12; a sealing ring 7 is provided between the inner wall of the second blind hole 22 and the sheath 12. The sealing ring 7 can seal the connection between the low-voltage fitting 2 and the crossarm body 1, preventing water from entering through the connection and wetting the insulating core 11, which would reduce the insulation performance of the composite insulating crossarm.

[0039] In an optional embodiment, the low-pressure fitting 2 has an annular groove 23 on the inner wall of the second blind hole 22 at one end. The annular groove 23 is smaller at the end closer to the crossarm body 1 and larger at the end farther from the crossarm body 1. The sealing ring 7 is adapted to be installed in the annular groove 23. The annular groove 23 is larger at one end and smaller at the other end. After the insulating core rod is inserted into the first blind hole 31, it is pressed to prevent the sealing ring 7 from being squeezed out during pressing and affecting the sealing performance.

[0040] In an optional embodiment, the cross-section of the annular groove 23 is a stepped structure with a larger outer diameter at one end away from the crossbeam body 1 and a smaller outer diameter at the other end; the cross-section of the sealing ring 7 is a stepped structure adapted to the annular groove 23, which can install and position the sealing ring 7, and has a limiting effect on the sealing ring 7 during press fitting.

[0041] In an optional embodiment, the low-pressure fitting 2 is provided with a positioning mark 25, and the connecting fitting 3 is provided with an alignment mark 34 corresponding to the two sets of mounting holes 32 in its axial direction. When the through hole 21 connects to a set of mounting holes 32, the positioning mark 25 points to a pair of alignment marks 34. The alignment marks 34 are provided at the end of the connecting fitting 3, and the positioning mark 25 is provided on the low-pressure fitting 2 near the insertion section 24 of the first blind hole 31. Through the positioning mark on the low-pressure fitting 2 and the alignment mark 34 on the connecting fitting 3, circumferential positioning can be performed, which facilitates quick alignment and connection of the through hole 21 with the required set of mounting holes 32. When the insertion section 24 of the low-pressure fitting 2 is a hollow structure, the through hole 21 consists of two coaxial through sub-holes.

[0042] In the optional scheme of this embodiment, both the positioning mark 25 and the alignment mark 34 are bar lines, which have a simple structure and are easy to align.

[0043] In an optional embodiment, the high-voltage fitting 4 is installed in the same connection structure as the low-voltage fitting 2 is connected to the crossarm body 1; that is, one end of the high-voltage fitting 4 is press-fitted onto the end of the insulating inner core 11 covering the sheath 12; a sealing ring 7 is provided between the high-voltage fitting 4 and the sheath 12.

[0044] In an optional embodiment, the low-pressure fitting 2 has a stepped shaft structure, with the narrow end of the stepped shaft serving as the insertion section 24 for inserting into the first blind hole 31. A through hole 21 is located on the insertion section 24. When the end face of the connecting fitting 3 abuts against the shoulder of the stepped shaft, the axes of the two sets of mounting holes 32 are on the same plane as the axis of the through hole 21. Preferably, the low-pressure fitting 2 is a cylindrical stepped shaft, and one end of the connecting fitting 3 is a circular tube, with the outer diameter of the tube matching the outer diameter of the stepped shaft near the insertion section of the low-pressure fitting 2. The stepped shaft structure of the low-pressure fitting 2 allows for axial positioning when the end face of the connecting fitting 3 abuts against the shoulder during insertion into the first blind hole 31. After the low-pressure fitting 2 is inserted into the first blind hole 31 and limited by the shoulder, rotating the connecting fitting 3 connects the through hole 21 to the required set of mounting holes 32, allowing for the insertion of the bolt 8. This design is convenient to use.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-install composite insulating crossarm, characterized in that: include, The crossarm body (1) includes a plurality of umbrella skirts (13) spaced apart along its axial direction. Low-pressure fitting (2), one end of the low-pressure fitting (2) is pressed into one end of the crossarm body (1), and the other end is radially arranged with a through hole (21) through the low-pressure fitting (2). The connecting tower fitting (3) has a first blind hole (31) at one end and is fitted onto the other end of the low-pressure fitting (2) through the first blind hole (31). The connecting tower fitting (3) has two sets of mutually perpendicular mounting holes (32) spaced circumferentially. Each set of mounting holes (32) includes two coaxial mounting holes that connect to the first blind hole (31). The through hole (21) can be connected to any set of mounting holes (32). After the through hole (21) is connected to a set of mounting holes (32), it is used to pass through bolts (8) to bolt the low-pressure fitting (2) to the connecting tower fitting (3). The connecting tower fitting (3) includes a connecting plate (33) at the other end. The connecting plate (33) includes a straight plate structure or an arc plate structure. The axis of the straight plate or the arc plate is perpendicular to the axis of a set of mounting holes (32). High-voltage fitting (4) is located at the other end of the crossarm body (1).

2. The quick-installation composite insulating crossarm as described in claim 1, characterized in that: The low-voltage fitting (2) has a second blind hole (22) at one end, and the crossarm body (1) is pressed into the second blind hole (22) at one end; the crossarm body (1) includes an insulating inner core (11), a waterproof sheath (12) covering the insulating inner core (11), and a plurality of umbrella skirts (13) provided outside the sheath (12); the second blind hole (22) of the low-voltage fitting (2) is pressed into the end of the insulating inner core (11) covering the sheath (12).

3. The quick-installation composite insulating crossarm as described in claim 2, characterized in that: The low-voltage fitting (2) is pressed onto the end of the insulating core (11); a sealing ring (7) is provided between the inner wall of the second blind hole (22) and the sheath (12).

4. The quick-installation composite insulating crossarm as described in claim 3, characterized in that: The low-pressure fitting (2) has an annular groove (23) on the inner wall of the second blind hole (22) at one end. The annular groove (23) is smaller at the end near the crossarm body (1) and larger at the end away from the crossarm body (1). The sealing ring (7) is adapted to be installed in the annular groove (23).

5. A quick-install composite insulating crossarm as described in claim 4, characterized in that: The cross section of the annular groove (23) has a P-shaped structure with a large outer diameter at one end away from the main body (1) and a small outer diameter at the other end; the cross section of the sealing ring (7) has a P-shaped structure that adapts to the annular groove (23) before compression.

6. A quick-installation composite insulating crossarm as described in any one of claims 1-5, characterized in that: The low-pressure fitting (2) is provided with a positioning mark (25), and the connecting tower fitting (3) is provided with an alignment mark (34) corresponding to two sets of mounting holes (32) in its axial direction. When the through hole (21) connects to a set of mounting holes (32), the positioning mark (25) points to a pair of alignment marks (34).

7. A quick-install composite insulating crossarm as described in claim 6, characterized in that: Both the positioning mark (25) and the alignment mark (34) are bar lines.

8. A quick-install composite insulating crossarm as described in claim 1, characterized in that: The low-pressure fitting (2) has a stepped shaft structure. The narrow end of the stepped shaft is the insertion section (24) for inserting into the first blind hole (31). The through hole (21) is located on the insertion section (24). When the end face of the connecting tower fitting (3) abuts against the shoulder of the stepped shaft, the axes of the two sets of mounting holes (32) are on the same plane as the axis of the through hole (21).

9. A quick-installation composite insulating crossarm as described in claim 1, characterized in that: The high-voltage fitting (4) is provided with a hanging fitting (6) at the end away from the crossarm body (1), and a pull rod (5) is connected to the hanging fitting (6) at an angle to the crossarm body (1).

10. A quick-installation double crossarm structure, characterized in that: The device includes two composite insulated crossarms. Each composite insulated crossarm includes a crossarm body (1), low-voltage fittings (2) and high-voltage fittings (4) located at both ends of the crossarm body, and a connecting tower fitting (3) located on the low-voltage fittings (2). One end of the low-voltage fittings (2) is located at one end of the crossarm body (1), and the other end has a through hole (21) that penetrates the low-voltage fittings (2) radially. One end of the connecting tower fitting (3) has a first blind hole (31) and is fitted onto the other end of the low-voltage fittings (2) through the first blind hole (31). The connecting tower fitting (3) has two sets of axially perpendicular mounting holes (32) spaced circumferentially. Each set of mounting holes (32) includes two coaxial mounting holes that connect to the first blind hole (31). The through hole (21) can be connected to any set of mounting holes (32). The corresponding connection is made, and the through hole (21) is connected to a set of mounting holes (32) for bolting the low-voltage fitting (2) and the tower fitting (3) through the bolt (8); the tower fitting (3) includes a connecting plate (33) located at the other end; the two composite insulating crossarms are set at an angle, and their high-voltage fittings (4) are fixed on the hanging fitting (6), and a pull rod (5) is connected on the hanging fitting (6); the hanging fitting (6) includes two connecting cylinders, the connecting cylinders are fitted on one end of the high-voltage fitting (4), and the connecting cylinders are provided with two sets of vertical mounting holes (32); one end of the high-voltage fitting (4) is provided with a through hole (21), and the through hole (21) is connected to any set of mounting holes (32) for inserting bolts (8) to bolt the connecting cylinder and the high-voltage fitting (4).

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