Power transmission line double-split sub-line spacer

Abstract

The invention discloses a double-split sub-line spacer of a power transmission line. The double-split sub-line spacer comprises a plate-shaped spacer body of which the two ends are provided with opposite hooks on the same side; the movable clamping block is bound on the plate-shaped spacer body in a multi-guide manner and performs relative / opposite movement to realize clamping / loosening by taking the length direction of the plate-shaped spacer body as a first direction; the push rod is connected with the movable clamping block and pushes / pulls the movable clamping block to move; a nut lifting block is hinged to the push rod and is restrained by rotation prevention; the bolt is in a second direction perpendicular to the length direction of the plate-shaped spacer body and penetrates through the plate-shaped spacer body, and the bolt is in threaded connection with a nut lifting block. Two-way jacking can be achieved only through one bolt, the structure is simple, operation is easy, and high-altitude unmanned hot-line work installation can be achieved if the device is matched with a corresponding installation tool.

Description

Technical Field

[0001] The present application relates to the technical field of devices for maintaining overhead line spacing, and in particular to a double-split sub-line spacer for a transmission line. Background Art

[0002] Split conductors are a method of laying conductors for high-voltage or ultra-high-voltage transmission lines to suppress corona discharge and reduce line reactance. Each phase is composed of several smaller-diameter sub-conductors, separated by a specified distance. Double-split conductors, consisting of two sub-conductors, are commonly used on 220 kV transmission lines.

[0003] Because the two sub-conductors of a double-split conductor are very close to each other, they often vibrate under the influence of wind. Under special meteorological conditions and terrain, the conductors will experience rare and large jumps, commonly known as galloping, which can cause conductor mixing and air insulation breakdown. In severe cases, it can cause damage to line insulators, hardware, crossarms or pole tower components. Therefore, between the sub-conductors of the double-split conductor, spacers must be used to separate the conductors to suppress the mutual galloping between the sub-conductors.

[0004] Existing double-split conductor spacers require manual installation at height. This high-altitude work poses significant safety risks and requires power outages, which can have significant impacts. Therefore, there is an urgent need for a double-split rigid spacer that can be quickly installed and can be installed unmanned at height. Summary of the Invention

[0005] In view of this, the present application provides a double-split sub-line spacer for a transmission line, which can be tightened in both directions with just one bolt with a self-locking function. It has a simple structure and is easy to operate. If used in conjunction with corresponding installation tools, it can realize unmanned live-line installation at high altitude.

[0006] According to one aspect of the present application, an embodiment provides a double-split sub-line spacer for a power transmission line, comprising:

[0007] A plate-shaped spacer body with two opposite hooks on the same side;

[0008] Multiple guides are restrained on the plate-shaped spacer body, with the length direction of the plate-shaped spacer body as the first direction, and the movable clamping blocks are moved relative to each other to achieve clamping / loosening;

[0009] A push rod connected to the movable clamp and pushing / pulling the movable clamp to move;

[0010] A nut lifting block is hingedly connected to the push rod, and the nut lifting block is restrained from rotating; and

[0011] A bolt is provided in a second direction perpendicular to the length direction of the plate-shaped spacer bar body and passes through the plate-shaped spacer bar body. The bolt is threadedly connected to the nut lifting block.

[0012] In some embodiments, a large bolt through hole is provided in the center of the plate-shaped spacer bar body for a bolt to pass through the plate-shaped spacer bar body.

[0013] In some embodiments, the multiple guide constraints of the movable clamp include a first-level constraint guide rod assembly and a second-level constraint limit clip. The guide rod assembly includes a guide rod and a guide slider. The guide slider is fixedly arranged on the surface of the side with the bent hook of the plate-like spacer rod body. The guide rod slides through the guide slider in the first direction. One end of the guide rod is fixedly connected to the movable clamp. The limit clip includes two clips arranged in a mirror-symmetrical manner. The clips are fastened to the movable clamp by fasteners. The clips can be slidably clamped on the side of the plate-like spacer rod body.

[0014] In some embodiments, the multiple guide constraints of the movable clamp also include a third constraint guide block, and the guide block and the movable clamp are arranged integrally or separately. The surface of the hook side of the plate-like spacer rod body is provided with a guide groove along the first defense line, and the guide block is placed in the guide groove.

[0015] In some embodiments, the movable clamping block has a clamping block portion and a connecting portion, and the clamping block portion and the connecting portion are arranged integrally or separately. The clamping block portion has an arc-shaped surface opposite to the bent hook on the plate-shaped spacer rod body, and the connecting portion has an ear plate hingedly connected to the push rod.

[0016] In some embodiments, the nut lifting block is provided with an internal threaded through hole that cooperates with the bolt, and the nut lifting block has a hinge hole hinged to the push rod. There are one or two intersection holes. If there is one, the intersection hole intersects with the internal threaded through hole. If there are two, the axes of the internal threaded through holes are symmetrical to each other, and a certain distance can be maintained between the connecting part and the axis of the internal threaded through hole to shorten the length of the push rod.

[0017] In some embodiments, the anti-rotation restraint of the nut lifting block is two anti-rotation plates arranged on both sides of the bolt through hole of the plate-shaped spacer rod body. The two anti-rotation plates clamp the nut lifting block to prevent the nut lifting block from rotating during the bolt tightening process.

[0018] In some embodiments, the nut lifting block and the anti-rotation plate are provided with mutually cooperating guide grooves and guide protrusions, allowing the nut lifting block to further rise and fall smoothly in the second direction during the bolt tightening process and prevent rotation.

[0019] In some embodiments, the bolt is provided with a flat washer and an elastic washer or a self-locking washer to enhance the self-locking property of the bolt and prevent the bolt from loosening.

[0020] In some embodiments, a coil spring is passed through the bolt between the plate-shaped spacer rod body and the nut lifting block.

[0021] In some embodiments, a bolt anti-loosening assembly is provided on the anti-rotation plate and the bolt, and the bolt anti-loosening assembly includes a ratchet and a pawl. The ratchet is fixed on the bolt and rotates with the rotation of the bolt, and the pawl is fixed on any of the anti-rotation plates.

[0022] The beneficial effects of the present invention are:

[0023] 1. The double-split sub-wire spacer for a power transmission line of the present invention has a good tightening effect through a single-bolt bidirectional tightening design, can ensure a stable spacing between the double-split conductors, and has a simple structure and is easy to install.

[0024] 2. The double-split sub-conductor spacer for a transmission line of the present invention has multiple guide constraints that can ensure that the movable clamp is tightened in the first direction, and the bolt itself has a self-locking property, which can ensure that the bolt will not reverse and loosen after tightening, and maintain long-term and stable fixation on the double-split conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0026] Figure 2 It is a front view of the present invention;

[0027] Figure 3 It is a cross-sectional view of the present invention.

[0028] In the figure: 1. Plate-shaped spacer rod body; 2. Movable clamping block; 21. Movable clamping block body; 22. Connecting base plate; 3. Push rod; 4. Nut lifting block; 5. Bolt; 6. Coil spring; 7. First-level restraint guide rod assembly; 71. Guide slider; 72. Guide rod; 8. Second-level restraint limit clip; 9. Spacer block; 10. Anti-rotation plate. DETAILED DESCRIPTION

[0029] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0030] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0031] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0032] In AC transmission and distribution overhead lines, the spacing between two split conductors is usually 400mm.

[0033] Example:

[0034] Please refer to Figure 1-Figure 3 According to one aspect of the present application, an embodiment provides a double-split sub-line spacer for a power transmission line, comprising:

[0035] The plate-like spacer bar body 1 has two opposite hooks on the same side at both ends, which is usually made of stainless steel, aluminum alloy or nickel-plated steel plate. The length is usually 460-500mm and the width is 80-120mm. A large bolt through hole is provided in the center of the plate-like spacer bar body 1 for the bolt 5 to pass through the plate-like spacer bar body. The diameter of the bolt through hole can allow the M20 or M18 bolt 5 to pass through, and the hooks on both sides are semicircular.

[0036] The multiple guides are restrained on the plate-shaped spacer body 1, and the movable clamping blocks 2 are clamped / released by moving relative / toward each other with the length direction of the plate-shaped spacer body 1 as the first direction.

[0037] The movable clamping block 2 includes a movable clamping block body 21 and a connecting base plate 22. The movable clamping block body 21 is fixed on the connecting base plate 22. The front end of the movable clamping block body 21 has an arc-shaped groove. The connecting base plate 22 is provided with an ear plate hingedly connected to the push rod 3.

[0038] In another embodiment, the movable clamping block body 21 and the connecting base plate 22 of the movable clamping block 2 are integrally provided.

[0039] The multiple guide restraints of the movable clamp 2 include a first restraint guide rod assembly 7 and a second restraint limit clip 8 .

[0040] The first-weight restraint guide rod assembly 7 includes a guide rod 72 and a guide slider 71. The guide slider 71 is fixedly arranged on the surface of the hook side of the plate-like spacer rod body 1. The guide rod 72 slides through the guide slider 71 in the first direction. One end of the guide rod 72 is fixedly connected to the connecting base plate 22 of the movable clamp 2. There are two guide rods 72, one end of which is fixedly connected to the connecting base plate 72 in parallel.

[0041] The second-level restraint limit clip 8 includes two clips arranged in a mirror-symmetrical manner. The clips are fastened to the connecting base plate 22 of the movable clamping block 2 through fasteners. The clips can be slidably clamped on the side of the plate-like spacer rod body 1.

[0042] A push rod 3 is connected to the movable clamping block 2 and pushes / pull the movable clamping block to move. The push rod 3 is made of metal with good rigidity, and its cross-sectional shape will not bend or deform during the pushing process.

[0043] The nut lifting block 4 is hingedly connected to the push rod 3, and the nut lifting block 4 is restrained from rotating.

[0044] The nut lifting block 4 is provided with an internal threaded through hole that cooperates with the bolt 5. The nut lifting block 4 has a hinge hole that is hinged to the push rod 3. There are one or two intersection holes. If there is one, the intersection hole intersects with the internal threaded through hole. If there are two, the axes of the internal threaded through holes are symmetrical to each other. The connecting part can be kept at a certain distance from the axis of the internal threaded through hole to shorten the length of the push rod 3.

[0045] The anti-rotation restraint of the nut lifting block 4 is two anti-rotation plates 10 arranged on both sides of the bolt through hole of the plate-shaped spacer rod body. The two anti-rotation plates 10 clamp the nut lifting block 4 to prevent the nut lifting block 4 from rotating during the tightening of the bolt 5.

[0046] The nut lifting block 4 and the anti-rotation plate 10 are provided with mutually cooperating guide grooves and guide ridges, which allow the nut lifting block 4 to further rise and fall smoothly in the second direction during the tightening of the bolt 5 and prevent rotation.

[0047] The bolt 5 is provided with a flat washer and an elastic washer or a self-locking washer to enhance the self-locking property of the bolt 5 and prevent the bolt 5 from loosening.

[0048] A coil spring 6 is passed through the bolt 5 between the plate-like spacer body 1 and the nut lifting block 4. When the nut lifting block 4 rises, the coil spring 6 can be compressed. When the coil spring 6 is compressed to the limit, the nut lifting block 4 can no longer rise, thereby limiting the movable clamp 2, thereby preventing the electric wrench from continuously tightening during the lifting process using a drone, causing the hook tops at both ends of the plate-like spacer body 1 to be deformed or bent, thereby damaging the double-split sub-line spacer of a power transmission line of the present invention.

[0049] In another specific embodiment, a bolt anti-loosening assembly is provided on the anti-rotation plate 10 and the bolt 5, and the bolt anti-loosening assembly includes a ratchet and a pawl. The ratchet is fixedly provided on the bolt 5 and rotates with the rotation of the bolt 5, and the pawl is fixedly provided on any one of the connecting rod seat anti-rotation plates 10.

[0050] In order to realize the UAV hoisting operation, the side of the plate-shaped spacer rod body 1 is provided with a bolt hole for screwing in a small bolt, and the small bolt is used as a lifting lug for hoisting.

[0051] In another specific embodiment, the plate-shaped spacer body 1 is provided with lifting holes on both sides of the large bolt through hole, and the lifting holes are hooked by a special lifting device to achieve lifting.

[0052] The present invention relates to a double-split sub-conductor spacer for a power transmission line. When in use, the hooks at both ends of the plate-shaped spacer body 1 hook the two sub-conductors of the double-split conductor. The bolt 5 is tightened with a tool to allow the movable top block 2 to move toward the semicircular hook until the sub-conductors are clamped and fixed to the double-split conductor.

[0053] The double-split sub-line spacer for a power transmission line of the present invention can be tightened in both directions with only one bolt 5 , has a simple structure and is easy to operate. If used in conjunction with corresponding installation tools, it can be installed by unmanned live-line operation at high altitude.

[0054] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A double-split sub-line spacer for a transmission line, characterized in that include: A plate-shaped spacer body with two opposite hooks on the same side; Multiple guides are restrained on the plate-shaped spacer body, with the length direction of the plate-shaped spacer body as the first direction, and the movable clamping blocks are moved relative to each other to achieve clamping / loosening; A push rod connected to the movable clamp and pushing / pulling the movable clamp to move; A nut lifting block is hingedly connected to the push rod, and the nut lifting block is restrained against rotation; and A bolt is provided in a second direction perpendicular to the length direction of the plate-shaped spacer bar body and passes through the plate-shaped spacer bar body. The bolt is threadedly connected to the nut lifting block.

2. A double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: A large bolt through hole is provided at the center of the plate-shaped spacer rod body.

3. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: The multiple guide constraints of the movable clamp include a first-level constraint guide rod assembly and a second-level constraint limit clip. The guide rod assembly includes a guide rod and a guide slider. The guide slider is fixedly arranged on the surface of the bent hook side of the plate-like spacer rod body. The guide rod slides through the guide slider in the first direction. One end of the guide rod is fixedly connected to the movable clamp. The limit clip includes two clips arranged in a mirror-symmetrical manner. The clips are fastened to the movable clamp by fasteners. The clips can be slidably clamped on the plate-like spacer rod body on the side of the plate-like spacer rod body.

4. A double-split sub-line spacer for a power transmission line according to claim 3, characterized in that: The multiple guide constraints of the movable clamp also include a third constraint guide block, which is arranged integrally or separately with the movable clamp. The surface of the plate-like spacer rod body with the curved hook side is provided with a guide groove along the first defense line, and the guide block is placed in the guide groove.

5. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: The movable clamping block has a clamping block part and a connecting part, which are arranged integrally or separately. The clamping block part has an arc-shaped surface opposite to the hook on the plate-shaped spacer rod body, and the connecting part has an ear plate hingedly connected to the push rod.

6. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: The nut lifting block is provided with an internal threaded through hole that cooperates with the bolt, and the nut lifting block has a hinge hole that is hinged to the push rod. There are one or two intersection holes. If there is one, the intersection hole intersects with the internal threaded through hole. If there are two, the axes of the internal threaded through holes are symmetrical to each other, and a certain distance can be maintained between the connecting part and the axis of the internal threaded through hole to shorten the length of the push rod.

7. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: The anti-rotation restraint of the nut lifting block is two anti-rotation plates arranged on both sides of the bolt through hole of the plate-shaped spacer rod body. The two anti-rotation plates clamp the nut lifting block to prevent the nut lifting block from rotating during the bolt tightening process.

8. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: The nut lifting block and the anti-rotation plate are relatively provided with mutually cooperating guide grooves and guide ridges, so that the nut lifting block can be further lifted and lowered in the second direction smoothly during the bolt tightening process and prevented from rotating.

9. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: The bolt is provided with a flat washer and an elastic washer or a self-locking washer to enhance the self-locking property of the bolt and prevent the bolt from loosening.

10. The double-split sub-line spacer for a power transmission line according to claim 1, characterized in that: A coil spring is passed through the bolt between the plate-shaped spacer rod body and the nut lifting block.

11. The double-split sub-line spacer for a power transmission line according to claim 8, characterized in that: The anti-rotation plate and the bolt are provided with a bolt anti-loosening assembly, and the bolt anti-loosening assembly includes a ratchet and a pawl. The ratchet is fixedly provided on the bolt and rotates with the rotation of the bolt, and the pawl is fixedly provided on any of the anti-rotation plates.

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