Adjustable connecting structure of post insulator base and box type cross arm
By designing the crossarm clamping assembly and intermediate connector, an adjustable connection between the post insulator base and the box-type crossarm is achieved, solving the problem of insufficient versatility of traditional connection structures, adapting to crossarms of different specifications, and enhancing the flexibility and reliability of the connection.
Patent Information
- Application Number
- CN202511699063.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-02-10
AI Technical Summary
The connection structure between the traditional post insulator base and the box-type crossarm is not very versatile and needs to be redesigned when the line tower location changes.
It adopts a crossarm clamping assembly and intermediate connecting parts, including upper connecting parts, lower connecting parts and fasteners. The adjustable connection between the post insulator base and the box-type crossarm is realized through the angle adjustment structure, which can adapt to box-type crossarms of different specifications.
It achieves a reliable connection between the post insulator base and the box-type crossarm, adapts to various scenarios, avoids the problem of having to redesign the base due to changes in tower location, and enhances the flexibility and reliability of the connection.
Smart Images
Figure CN121507624A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of power transmission engineering, and particularly relates to a connecting structure of a support insulator base and a box-type cross arm. BACKGROUND
[0002] The acute angle between the conductor and the box-type cross arm is between 45° and 90°, and the traditional method is to design a new cross arm and insulator base according to the acute angle between the conductor and the box-type cross arm, and adjust the horizontal angle between the cross arm and the insulator base so that the cross arm and the insulator axis direction are parallel to the conductor. This method is not universal, and once the line tower position changes, the original designed base must be redesigned. SUMMARY
[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the application is to provide an adjustable connecting structure of a support insulator base and a box-type cross arm, which is suitable for the connection between the support insulator base and the box-type cross arm in various scenes.
[0004] To solve the above technical problems, the application adopts the following technical scheme: an adjustable connecting structure of a support insulator base and a box-type cross arm, comprising a cross arm clamping assembly and an intermediate connecting piece, the cross arm clamping assembly is clamped and fixed on the box-type cross arm, comprising an upper connecting piece and a lower connecting piece corresponding to the upper side and the lower side of the box-type cross arm, and a fastener connecting the upper connecting piece and the lower connecting piece, the first end of the intermediate connecting piece is fixed with the support insulator base, and the second end of the intermediate connecting piece is provided with an angle adjusting structure for adjusting the relative angle between the lower connecting piece and the intermediate connecting piece in the horizontal direction.
[0005] Preferably, the lower surface of the box-type cross arm has a slope, the fastener is a long bolt, the bolt head of the long bolt is located on the lower side of the box-type cross arm, a spring washer is sleeved on the long bolt above the bolt head, and the spring washer is in elastic abutment with the lower surface of the box-type cross arm.
[0006] Preferably, the screw rod of the long bolt is a non-full thread screw rod, the long bolt is provided with two nuts, and the nut in abutment with the upper side of the box-type cross arm is a non-full thread nut.
[0007] Preferably, the abutting surfaces of the upper connecting piece and the lower connecting piece and the box-type cross arm are provided with friction lines.
[0008] Preferably, the lower connecting piece is provided with an extension section extending below the intermediate connecting piece, the angle adjusting structure comprises an angle adjusting disc arranged on the side surface of the extension section and an angle locking plate arranged on the side surface of the second end of the intermediate connecting piece, the second end of the intermediate connecting piece is rotatably connected with the extension section of the lower connecting piece through a bolt, the angle adjusting disc is provided with a plurality of angle adjusting holes distributed along an arc line at intervals, the angle locking plate is provided with an angle locking hole, and the angle adjusting hole is selectively fixed with one of the angle locking holes through a bolt to lock the horizontal relative angle of the lower connecting piece and the intermediate connecting piece.
[0009] Preferably, the upper connecting piece and the lower connecting piece are made of angle steel, and the angle adjusting disc is a fan-shaped steel plate and is welded with the angle steel of the lower connecting piece.
[0010] Preferably, the intermediate connecting piece comprises an intermediate connecting angle steel, and the angle locking plate is welded with the intermediate connecting angle steel.
[0011] Preferably, one end of the support insulator base is provided with a circular connecting flange, the first end of the intermediate connecting angle steel is welded with a disc-shaped steel plate, and the disc-shaped steel plate is fixed with the connecting flange through a bolt.
[0012] Preferably, a stiffened plate is welded between the disc-shaped steel plate and the intermediate connecting angle steel.
[0013] Preferably, the surfaces of the upper connecting piece, the lower connecting piece and the intermediate connecting piece are provided with a zinc plating layer, and the thickness of the zinc plating layer is greater than or equal to 85 microns.
[0014] The technical scheme of the present application has the following beneficial effects:
[0015] The adjustable connecting structure of the support insulator base and the box-type cross arm comprises a cross arm clamping assembly and an intermediate connecting piece, the cross arm clamping assembly is clamped and fixed on the box-type cross arm, the cross arm clamping assembly comprises an upper connecting piece and a lower connecting piece arranged on the upper side and the lower side of the box-type cross arm respectively, and a fastener connecting the upper connecting piece and the lower connecting piece, therefore, the distance between the upper connecting piece and the lower connecting piece is adjustable, and can adapt to different specifications of the box-type cross arm. In addition, the first end of the intermediate connecting piece is fixed with the support insulator base, and the second end is provided with an angle adjusting structure for adjusting the horizontal relative angle of the lower connecting piece and the intermediate connecting piece, therefore, by adjusting the horizontal relative angle of the lower connecting piece and the intermediate connecting piece, the horizontal multi-angle rotation on the same support insulator base is realized, thereby realizing the reliable connection of the support insulator base and the box-type cross arm. For the common 110kV and 220kV steel pipe pole box-type cross arm with height, slightly high and width dimensions, the connecting node of the base and the steel pipe pole box-type cross arm does not need to be redesigned.
[0016] The features and advantages of the present application will be more apparent from the following specific embodiments, drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS
[0017] The application will be further described with reference to the drawings. Figure 1 A front view of an adjustable connecting structure of a post insulator base and a box-type cross arm according to an embodiment of the present application; Figure 1a A front view of an adjustable connecting structure of a post insulator base and a box-type cross arm according to an embodiment of the present application; Figure 1 An enlarged structural schematic view of A1 in the middle; Figure 1b An enlarged structural schematic view of A2 in the middle; Figure 1 An enlarged structural schematic view of A2 in the middle; Figure 2 A front view of an adjustable connecting structure of a post insulator base and a box-type cross arm according to an embodiment of the present application; Figure 3 A structural schematic view of a lower connecting member according to an embodiment of the present application; Figure 4 A structural schematic view of a middle connecting member according to an embodiment of the present application; Figure 5 A structural schematic view of a box-type cross arm according to an embodiment of the present application; Figure 6 A structural schematic view of a box-type cross arm according to an embodiment of the present application; Figure 7 A structural schematic view of a long bolt according to an embodiment of the present application; In the figure: 1 - lower connecting member, 1.1 - force rod angle steel, 1.2 - angle adjusting disc, 1.21 - angle adjusting hole, 2 - middle connecting member, 2.1 - force rod angle steel, 2.2 - angle locking plate, 2.21 - angle locking hole, 2.3 - stiffening steel plate, 2.4 - disc steel plate, 3 - upper connecting member, 4 - long bolt, 4.1 - screw rod, 4.2 - full thread nut, 4.3 - non-full thread nut, 4.4 - sealing ring, 5 - ordinary bolt, H1 - height of box-type cross arm, H2 - slightly higher height of box-type cross arm, B - width of box-type cross arm. DETAILED DESCRIPTION
[0018] The technical solutions of the embodiments of the present application will be explained and described below in combination with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor also belong to the protection scope of the present application.
[0019] Those skilled in the art can understand that the features in the following embodiments and embodiments can be combined with each other without conflict.
[0020] The terms used in the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. For example, words such as "upper", "lower", "inner", "outer", etc. indicating the positional or spatial relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device / element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0021] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.
[0022] In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.
[0023] In combination Figures 1 to 7 As shown, the embodiment of the present application provides an adjustable connection structure of a support insulator base and a box-type cross arm, which comprises a cross arm clamping assembly and an intermediate connecting piece 2. The cross arm clamping assembly is clamped and fixed on the box-type cross arm. The cross arm clamping assembly comprises an upper connecting piece 3 and a lower connecting piece 1 corresponding to the upper side and the lower side of the box-type cross arm, and a fastener connecting the upper connecting piece 3 and the lower connecting piece 1. The first end of the intermediate connecting piece 2 is fixed with the support insulator base, and the second end is provided with an angle adjusting structure for adjusting the relative angle of the lower connecting piece and the intermediate connecting piece in the horizontal direction.
[0024] As Figure 5 and Figure 6As shown, the box-type cross arm width B is consistent along the length direction, but its lower surface has a slope, and the box-type cross arm heel height H1 is greater than the box-type cross arm toe height H2. In this embodiment, the fasteners are long bolts 4, and the upper connecting piece 3 and the lower connecting piece 1 are reliably bolted by the four long bolts. According to the box-type cross arm heel height and toe height, four long bolts 4 of appropriate length are selected, and the long bolt specification is M16, with double nut connection; according to the box-type cross arm width, the corresponding long bolts of the upper connecting piece and the lower connecting piece are selected for hole opening. The commonly used 110kV voltage level box-type cross arm heel height, toe height and width are 370mm, 150mm and 200mm respectively; the 220kV voltage level box-type cross arm heel height, toe height and width are 400mm, 120mm and 240mm respectively. The bolt head of the long bolt is located on the lower side of the box-type cross arm, and a spring washer is sleeved on the long bolt above the bolt head, and the spring washer is in elastic abutment with the lower surface of the box-type cross arm. During installation, the long bolt is adjusted to be in a vertical state so as to be aligned with the upper fixing hole of the upper connecting piece. The spring washer can compensate for the slope of the lower surface of the cross arm, realize a slope self-adaptive leveling structure, ensure the vertical stress of the bolt, and solve the problem of shear stress concentration caused by inclination in the traditional connection.
[0025] As shown in Figure 7 The long bolt 4 adopts a non-full thread nut bolt configuration, that is, the screw rod 4.1 of the long bolt is a non-full thread screw rod, that is, a threaded section is arranged away from the bolt head, and a non-threaded section is arranged close to the bolt head. The long bolt is provided with two nuts, the nut away from the upper side of the box-type cross arm is a full thread nut 4.2, and the nut in abutment with the upper side of the box-type cross arm is a non-full thread nut 4.3. The non-full thread nut 4.3 has a 2mm non-threaded section, and a sealing ring 4.4 is arranged at the threaded section to prevent the screw rod thread from entering the shear surface, because the thread entering the shear surface will reduce the shear and bearing capacity by about 11% and 22% respectively.
[0026] Further, the abutting surface of the upper connecting piece 3 and the lower connecting piece 1 connected with the box-type cross arm is provided with a friction pattern. Specifically, a 0.5mm deep sawtooth pattern can be processed, and the mechanical engagement of the abutting surface improves the anti-slippage ability of the base, avoids the loss of bolt pretightening force, and enhances the node stiffness.
[0027] In combination with Figures 1 to 4As shown, the lower connecting piece 1 is provided with an extension section extending below the intermediate connecting piece, the angle adjusting structure comprises an angle adjusting disc 1.2 provided on the side surface of the extension section and an angle locking plate 2.2 provided on the side surface of the second end of the intermediate connecting piece, the second end of the intermediate connecting piece 2 is rotationally connected with the extension section of the lower connecting piece by a bolt, the angle adjusting disc 1.2 is provided with a plurality of angle adjusting holes 1.21 distributed along an arc line, the angle locking plate is provided with an angle locking hole 2.21, and the angle adjusting hole is selectively fixed with one of the angle locking holes by a bolt to lock the horizontal relative angle of the lower connecting piece and the intermediate connecting piece. The bolt used here is a common bolt 5.
[0028] In this embodiment, angle steel is preferably used as the main force-bearing rod member to reduce the weight of the iron accessory. Specifically, the upper connecting piece 3 and the lower connecting piece 1 are made of angle steel. As shown in Figure 3 As shown, the angle adjusting disc 1.2 is a fan-shaped steel plate, and the fan-shaped steel plate is welded with the angle steel of the lower connecting piece. As shown in Figure 4 As shown, the intermediate connecting piece 2 comprises an intermediate connecting angle steel, and the angle locking plate 2.2 is welded with the intermediate connecting angle steel. One end of the support insulator base is provided with a circular connecting flange, the first end of the intermediate connecting angle steel is welded with a disc-shaped steel plate 2.4, and the disc-shaped steel plate 2.4 is fixed with the connecting flange by a bolt. The bolt used here is a common bolt 5. A stiffening steel plate 2.3 is welded between the disc-shaped steel plate 2.4 and the intermediate connecting angle steel to increase the overall rigidity.
[0029] Further, the surfaces of the upper connecting piece 3, the lower connecting piece 1 and the intermediate connecting piece 2 are provided with a zinc plating layer with a thickness of ≥85μm. This avoids the damage to the anti-corrosion layer caused by field welding and prolongs the service life of the base.
[0030] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto. Those skilled in the art should understand that the application includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the application shall be included in the scope of the claims.
Claims
1. An adjustable connection structure between a post insulator base and a box-type crossarm, characterized in that, The device includes a crossarm clamping assembly and an intermediate connector. The crossarm clamping assembly is clamped and fixed on the box-type crossarm. It includes an upper connector and a lower connector respectively located on the upper and lower sides of the box-type crossarm, as well as fasteners connecting the upper connector and the lower connector. The first end of the intermediate connector is fixed to the base of the post insulator, and the second end of the intermediate connector is provided with an angle adjustment structure between the intermediate connector and the lower connector for adjusting the relative horizontal angle between the lower connector and the intermediate connector.
2. The adjustable connection structure according to claim 1, characterized in that, The lower surface of the box-type crossarm has a slope. The fastener is a long bolt with the bolt head located on the lower side of the box-type crossarm. A spring washer is fitted above the bolt head of the long bolt, and the spring washer elastically abuts against the lower surface of the box-type crossarm.
3. The adjustable connection structure according to claim 2, characterized in that, The long bolt has a non-fully threaded screw, and the long bolt is provided with two nuts, and the nut that abuts against the upper side of the box crossarm is a non-fully threaded nut.
4. The adjustable connection structure according to claim 1, characterized in that, The surfaces of the upper and lower connectors that meet the box-shaped crossarm are provided with friction texture.
5. The adjustable connection structure according to claim 1, characterized in that, The lower connector has an extension section extending below the intermediate connector. The angle adjustment structure includes an angle adjustment disc on the side of the extension section and an angle locking plate on the side of the second end of the intermediate connector. The second end of the intermediate connector and the extension section of the lower connector are rotatably connected by bolts. The angle adjustment disc has a plurality of angle adjustment holes spaced along an arc. The angle locking plate has an angle locking hole. The angle adjustment hole is selectively fixed to one of the angle locking holes by bolts to lock the horizontal relative angle between the lower connector and the intermediate connector.
6. The adjustable connection structure according to claim 5, characterized in that, The upper and lower connectors are made of angle steel, and the angle adjustment plate is a sector-shaped steel plate welded to the angle steel of the lower connector.
7. The adjustable connection structure according to claim 5, characterized in that, The intermediate connecting component includes an intermediate connecting angle steel, and the angle locking plate is welded to the intermediate connecting angle steel.
8. The adjustable connection structure according to claim 7, characterized in that, One end of the support insulator base is provided with a circular connecting flange, and the first end of the intermediate connecting angle steel is welded with a disc steel plate, which is fixed to the connecting flange with bolts.
9. The adjustable connection structure according to claim 8, characterized in that, A reinforcing steel plate is welded between the disc steel plate and the intermediate connecting angle steel.
10. The adjustable connection structure according to claim 1, characterized in that, The surfaces of the upper connector, lower connector, and intermediate connector are provided with a zinc plating layer, and the zinc plating layer thickness is ≥85μm.