Temporarily securing spacers for chargeable installation of double-bundle conductors and method of installation

Abstract

The present application relates to the field of overhead transmission line hardware installation, and particularly discloses a live installation type double-bundle conductor temporary fixing spacer and a mounting method, the spacer comprising a top plate, a front and rear arranged fixed clamping plate and a movable clamping plate arranged below the top plate, the movable clamping plate being slidably connected with the top plate in the left-right direction through a sliding slot and sliding block structure, and the fixed clamping plate being connected with a linkage mechanism for positioning the left-right position of the movable clamping plate; the fixed clamping plate and the movable clamping plate are both provided with an open type embracing ring with an opening downward, and when the movable clamping plate is driven by the linkage mechanism to move to the right end position, the movable clamping plate and the fixed clamping plate embrace the conductor together. The device and method can effectively improve the installation quality of the spacer by applying an external force to the conductor to adjust the split distance of the conductor, and can quickly and conveniently control the distance between the double-bundle conductors within a reasonable range.

Description

Technical Field

[0001] This invention relates to the field of hardware installation for overhead transmission lines, specifically disclosing a live-installable temporary fixing spacer for double-split conductors and its installation method. Background Technology

[0002] To reduce corona loss and increase transmission capacity, long-distance power transmission typically uses expanded-diameter split conductors. The "General Design for Transmission and Transformation Engineering of State Grid Corporation of China" stipulates that double-split conductors should be included as a standard configuration in modular schemes for 220 kV transmission lines. Spacer bars are protective hardware that maintains the relative spacing between multiple sub-conductors in a single phase (pole) conductor. They suppress aerodynamic vibrations and secondary span vibrations, and prevent sub-conductors from whipping or tangling. The "Design Code for 110kV~750kV Overhead Transmission Lines (GB 50545-2010)" stipulates that sub-conductor spacer bars should be installed on double-split conductors, taking into account environmental conditions such as wind speed and ice load, as well as factors such as suppressing secondary span oscillations and electrical balance.

[0003] Common faults in conductor spacers include missing or detached spacers, slippage along the line, loose cotter pins, and breakage, with the fault points being relatively scattered. Troubleshooting typically involves power outages or manual climbing of the tower for live-line work, which is labor-intensive and carries risks of electric shock and falls from heights. Due to factors such as geographical environment and the duration of power outages, some conductor spacer faults cannot be repaired promptly, leading to worsening of the fault and escalation of risks.

[0004] Therefore, how to reliably install the sub-conductor spacer bar under energized conditions has become an urgent problem to be solved. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses a live-installable temporary spacer bar for double-split conductors and an installation method thereof. This device and method can effectively improve the installation quality and efficiency of the spacer bar by applying external force to the conductors to adjust the split spacing of the conductors, and quickly and conveniently control the spacing of the double-split conductors within a reasonable range.

[0006] A live-mountable, double-split conductor temporary fixing spacer includes a top plate. Below the top plate are fixed and movable clamping plates arranged in a front-to-back configuration. The movable clamping plates are slidably connected to the top plate in the left-right direction via a sliding block structure. The fixed clamping plates are connected to a linkage mechanism for positioning the movable clamping plates in the left-right direction. Both the fixed and movable clamping plates are provided with open-ended, downward-facing retaining rings. When the movable clamping plate moves to the right end position under the drive of the linkage mechanism, it cooperates with the fixed clamping plates to encircle the conductor.

[0007] Preferably, the linkage mechanism includes a triggering mechanism installed outside the fixed plate and an actuating mechanism installed between the fixed plate and the movable plate.

[0008] Preferably, the triggering mechanism includes a trigger rod, a lever, and an inclined force-applying spring. One end of the trigger rod is rotatably connected to the outer side of the fixed plate. The upper end of the lever is rotatably connected to the outer side of the fixed plate. The lever is connected to the top plate through the inclined force-applying spring. A limiting post for limiting the position of the trigger rod is provided on the outer side of the lever below the spring fixing point.

[0009] Preferably, the side of the trigger rod is provided with a positioning groove that cooperates with the limiting post.

[0010] Preferably, the actuating mechanism includes a positioning pin and a horizontal force-applying spring; the end of the fixed plate is provided with a closed elongated slot through hole extending vertically, and the end of the movable plate is provided with an open elongated slot through hole opening upwards, and the two elongated slot through holes are positioned against each other by the positioning pin; the left and right ends of the horizontal force-applying spring are correspondingly connected to the fixed plate and the movable plate.

[0011] Preferably, the slide block structure includes a T-shaped groove arranged in a left-right direction on the lower surface of the top plate and a T-shaped block arranged in a left-right direction on the upper surface of the movable plate.

[0012] Preferably, the slide block structure includes a dovetail groove arranged in a left-right direction on the lower surface of the top plate and a dovetail block arranged in a left-right direction on the upper surface of the movable plate.

[0013] Preferably, there are two fixed plates, which are symmetrically installed on the front and rear sides of the movable plate; there are two levers, whose upper ends are coaxially installed at the same point on the fixed plates, and each lever is connected to the top plate by an inclined force-applying spring.

[0014] Preferably, the lever is a bent structure consisting of at least two straight rods.

[0015] The present invention also discloses a method for installing the above-mentioned spacer, as follows: Step 1: Use a drone to hoist the spacer above the conductor and move the spacer from top to bottom; Step 2: The wire contacts the trigger rod, driving the trigger rod to rotate counterclockwise upwards, releasing the limit on the lever; Step 3: Rotate the lever to move the wires outward and adjust the wire spacing; Step 4: Move the lever to move the positioning pin to release the limit on the movable plate; Step 5: The movable plate slides horizontally and together with the fixed plate forms a loop to hold and fix the wire.

[0016] Beneficial effects: This invention uses a drone to hoist spacers above conductors. During the downward movement, the conductor touches a linkage mechanism, causing a movable clamping plate to move horizontally to the conductor and, together with a fixed clamping plate, hold the conductor in place. This device transforms spacer installation from manual to drone operation, avoiding the cumbersome process of moving the spacer out of the machine or working with live wires via a rope ladder. This saves manpower and reduces labor costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the initial position of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the initial position of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the initial position of the overall structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the final position of the overall structure of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the final position of the overall structure of the present invention. Figure 2 ; In the diagram, 1 is the top plate, 2 is the fixed plate, 2-1 is the closed long slot through hole, 3 is the movable plate, 3-1 is the open long slot through hole, 4 is the positioning pin, 5 is the lever, 5-1 is the limit post, 6 is the trigger rod, 7 is the inclined force spring, 8 is the lifting ring, and 9 is the horizontal force spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. In this application, "upper" and "lower" refer to the position of the lever before the spacer bar is installed to the wire (i.e., Figure 1 (The state shown is indicated). In this application, "external" refers to the side of the fixed plate that is furthest from the active plate, with the active plate as the reference.

[0020] Example 1 This invention discloses a method such as Figure 1-5The illustrated live-mountable double-split conductor temporary fixing spacer includes a top plate 1, a fixed clamping plate 2, and a movable clamping plate 3. The movable clamping plate 3 is slidably connected to the top plate 1 in the left-right direction via a sliding groove slider structure. Two fixed clamping plates 2 are symmetrically arranged on the front and rear sides of the movable clamping plate 3. The sliding groove slider structure is a support-type structure with an upper cross-section larger than the lower cross-section: it can be a left-right oriented T-shaped groove on the lower surface of the top plate 1 and a left-right oriented T-shaped block on the upper surface of the movable clamping plate 3; or it can be a left-right oriented dovetail groove on the lower surface of the top plate 1 and a left-right oriented dovetail block on the upper surface of the movable clamping plate 3.

[0021] The fixed plate 2 is connected to a linkage mechanism, which allows the movable plate 3 to be fixed and moved to its left and right extreme positions. Both the fixed plate 2 and the movable plate 3 are equipped with open-ended retaining rings facing downwards. When the movable plate 3 moves to its right extreme position under the drive of the linkage mechanism, the open-ended retaining ring of the movable plate 3 and the open-ended retaining ring of the fixed plate 2 cooperate to form a ring sleeve, which encircles the wires, separates two adjacent wires, and maintains a certain distance between them.

[0022] The linkage mechanism includes a triggering mechanism installed on the outside of the fixed plate 2 and an actuating mechanism installed between the fixed plate 2 and the movable plate 3. The triggering mechanism includes a trigger rod 6, two levers 5, and two inclined force-applying springs 7. The left end of the trigger rod 6 is rotatably connected to the lower front side of the fixed plate 2. A positioning slot is provided on each side of the connection point; the positioning slot on the left side of the connection point is an upward-opening U-shaped slot, and the positioning slot on the right side of the connection point is a downward-opening U-shaped slot. The levers 5 have a zigzag structure, with the two straight segments connected at an obtuse angle. The lower straight segments of the two levers 5 bend outwards and move away from each other. The upper ends of the two levers 5 are coaxially rotatably connected to the outer side of the fixed plate 2. A spring fixing point is provided below the rotatable connection point of each lever 5, and this spring fixing point is connected to the lifting ring 8 above the top plate 1 via the inclined force-applying spring 7. A limit post 5-1 is provided on the outer side of the lever 5, below the spring fixing point. In the initial position, the two U-shaped grooves respectively engage the limiting posts 5-1 from the top and bottom, causing the two levers 5 to be in a vertically inclined state. The moving mechanism includes a positioning pin 4 and a horizontal force-applying spring 9; both ends of the fixed plate 2 are provided with vertically extending closed long slot through holes 2-1, and both ends of the movable plate 3 are provided with upward-opening long slot through holes 3-1. The two long slot through holes are connected to each other by the positioning pin 4, so that the movable plate 3 is located at the leftmost extreme position. The left end of the horizontal force-applying spring 9 is installed on one side of the movable plate 3, and the right end of the horizontal force-applying spring 9 is connected to the side of one of the fixed plates 2 opposite to the movable plate 3. When lever 5 is released from its inclined state and rotates to a horizontal state and continues to rotate upward, it pushes the positioning pin 4 upward. The positioning pin 4 disengages from the open long slot through hole 3-1 of the movable plate 3, and the movable plate 3 loses its positioning. The restoring force of the horizontal force spring 9 pulls the movable plate 3 to slide to the right. The movable plate 3 cooperates with the fixed plate 2 to hold the wire, and the spacer is fixed on the wire.

[0023] Example 2 In this embodiment, there is only one fixed plate 2, which is set on the front side of the movable plate 3. Long slots and through holes are machined only on the left or right ends of the fixed plate 2 and the movable plate 3. There is also only one lever 5. At the same time, the broken-line lever 5 is set as a straight line. The improved spacer structure can also fix the spacer on the wire. Except for the poor stability, it can save materials.

[0024] Example 3 In this embodiment, in order to reduce the structural weight, both the fixed plate 2 and the movable plate 3 are designed and processed into hollow structures while ensuring structural strength, which can effectively reduce the weight by 37.9%.

[0025] Example 4 The present invention also discloses a method for installing the above-mentioned spacer, as follows: Step 1: Use a drone to hoist the spacer above the conductor, and the drone will move the spacer from top to bottom toward the conductor. Step 2: The wire contacts the trigger rod 6, driving the trigger rod 6 to rotate counterclockwise upwards, releasing the limit on the lever 5; Step 3: Rotate lever 5 to push the wires apart to make the two wires separate by a certain distance, and adjust the wire spacing. Step 4: Move lever 5 to move positioning pin 4 to release the limit on movable plate 3; Step 5: The movable card plate 3 slides horizontally and together with the fixed card plate 2 forms a ring to hold and fix the wire.

[0026] The spacer in this application is carried by a drone and automatically installed. Therefore, when the spacer approaches the conductor, a trigger signal is needed as a "trigger" for the next action (split spacing adjustment). The applicant lists two solutions: "mechanical trigger" and "remote trigger," and compares and analyzes them through experiments.

[0027] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A live-mountable double-split conductor temporary fixing spacer, characterized in that, Includes a top plate (1), under which are arranged fixed plates (2) and movable plates (3) arranged in front and behind. The movable plates (3) are slidably connected to the top plate (1) in the left and right directions through a sliding block structure. The fixed plates (2) are connected to a linkage mechanism for positioning the movable plates (3) in the left and right directions. Both the fixed plates (2) and the movable plates (3) are provided with open-ended rings with downward openings. When the movable plates (3) move to the right end position under the drive of the linkage mechanism, they cooperate with the fixed plates (2) to hug the wire in the left and right directions. The linkage mechanism includes a triggering mechanism installed outside the fixed plate (2) and an action mechanism installed between the fixed plate (2) and the movable plate (3); The triggering mechanism includes a trigger rod (6), a lever (5), and an inclined force-applying spring (7). One end of the trigger rod (6) is rotatably connected to the outer side of the fixed plate (2). The upper end of the lever (5) is rotatably connected to the outer side of the fixed plate (2). The lever (5) is connected to the top plate (1) through the inclined force-applying spring (7). A limiting post (5-1) for limiting the position of the trigger rod (6) is provided on the outer side of the lever (5) below the spring fixing point.

2. The live-mountable double-split conductor temporary fixing spacer according to claim 1, characterized in that, The side of the trigger rod (6) is provided with a positioning slot that cooperates with the limiting post (5-1).

3. The live-mountable double-split conductor temporary fixing spacer according to claim 2, characterized in that, The action mechanism includes a positioning pin (4) and a horizontal force-applying spring (9); the end of the fixed plate (2) is provided with a closed long slot through hole (2-1) extending vertically, and the end of the movable plate (3) is provided with an open long slot through hole (3-1) opening upward. The two long slot through holes are positioned to each other by the positioning pin (4); the left and right ends of the horizontal force-applying spring (9) are connected to the fixed plate (2) and the movable plate (3) respectively.

4. The live-mountable double-split conductor temporary fixing spacer according to claim 2, characterized in that, The fixed plate (2) consists of two pieces, which are symmetrically installed on the front and rear sides of the movable plate (3); the lever (5) consists of two pieces, with the upper ends of the two levers (5) coaxially installed at the same point on the fixed plate (2), and each lever (5) is connected to the top plate (1) through an inclined force-applying spring (7).

5. The live-mountable double-split conductor temporary fixing spacer according to claim 2, characterized in that, The lever (5) is a bent structure consisting of at least two straight rods.

6. The live-mountable double-split conductor temporary fixing spacer according to claim 1, characterized in that, The slide block structure includes a T-shaped groove arranged in a left-right direction on the lower surface of the top plate (1) and a T-shaped block arranged in a left-right direction on the upper surface of the movable plate (3).

7. The live-mountable double-split conductor temporary fixing spacer according to claim 1, characterized in that, The slide block structure includes a dovetail groove arranged in a left-right direction on the lower surface of the top plate (1) and a dovetail block arranged in a left-right direction on the upper surface of the movable plate (3).

8. The installation method of the live-mountable double-split conductor temporary fixing spacer according to claim 3, characterized in that, Specifically as follows: Step 1: Use a drone to hoist the spacer above the conductor and move the spacer from top to bottom; Step 2: The wire contacts the trigger rod (6), driving the trigger rod (6) to rotate counterclockwise upwards, releasing the limit of the lever (5); Step 3: Rotate lever (5) to move the wires outward and adjust the wire spacing; Step 4: Use lever (5) to move positioning pin (4) to release the limit on movable plate (3); Step 5: The movable card plate (3) slides horizontally and together with the fixed card plate (2) forms a ring to hold and fix the wire.

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