An ice-shedding jump suppression device for transmission lines

Abstract

The present invention provides a transmission line de-icing jump suppression device, comprising a wire clamp, a fixed base, a safety spring, a safety link, a first steel column, a cantilever beam, a connecting spring and a sliding counterweight; the wire clamp is arranged on the top of the fixed base for fixing the transmission line; the cantilever beam is fixed to the upper part of the first side surface of the fixed base, the upper end of the connecting spring is connected to the cantilever beam, and the lower end thereof is connected to the sliding counterweight; a groove is provided at the lower part of the first side surface of the fixed base, and the sliding counterweight can slide up and down along the groove under the drive of the connecting spring, and can actively accelerate the consumption of vibration energy, so that the vibration of the ground wire stops quickly, and avoids damage to the transmission line; the present invention is easy to install and has high reliability, and the stiffness of the safety spring and the weight of the sliding counterweight can be targetedly adjusted according to the structural parameters of the transmission line and the icing conditions, etc., and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission lines, and particularly to a device for suppressing ice-shedding jump of transmission lines. Background Art

[0002] Transmission lines spanning cold regions or operating in winter are prone to icing under suitable meteorological conditions. When the ambient temperature rises or the combined action of wind force and ice gravity occurs, the ice will fall off the conductors and ground wires, causing a sudden unloading of the ice load, thereby causing large-amplitude vibration jumps of the conductors and ground wires. This phenomenon is called ice-shedding jump. Ice-shedding jump may lead to insufficient electrical safety distances between conductors and ground wires, between different-phase conductors, between conductors and towers, and between conductors and the ground, resulting in electrical accidents such as short circuits or flashovers. At the same time, the large-amplitude vibration of the conductors and ground wires may cause mechanical damage accidents such as broken strands and broken wires, broken and damaged insulator strings, damaged tower components, and even tower collapse, seriously threatening power supply safety. To reduce the harm of ice-shedding jump, methods such as installing phase spacers on transmission lines, increasing the phase distance, and using V-shaped insulator strings are usually adopted. In the prior art, the suppression of ice-shedding jump of transmission lines is mainly achieved by restricting the vibration of conductors and ground wires and increasing the electrical safety distance. Since the vibration energy is mainly consumed through the self-damping of conductors and ground wires and the damping between conductors and ground wires and fittings, the time from the occurrence of ice-shedding jump to the stop of vibration of conductors and ground wires is relatively long, seriously damaging the transmission lines. Summary of the Invention

[0003] To overcome the above deficiencies in the prior art that seriously damage transmission lines, the present invention provides a device for suppressing ice-shedding jump of transmission lines, including a clamp, a fixed base, a cantilever beam, a connecting spring, and a sliding counterweight; the clamp is arranged on the top of the fixed base for fixing the transmission line; the cantilever beam is fixed on the upper part of the first side of the fixed base, the upper end of the connecting spring is connected to the cantilever beam, and its lower end is connected to the sliding counterweight; a groove is provided at the lower part of the first side of the fixed base, and the sliding counterweight can slide up and down along the groove under the drive of the connecting spring, capable of actively accelerating the consumption of ice-shedding vibration energy, quickly stopping the vibration of the conductors and ground wires, and avoiding damage to the transmission lines.

[0004] To achieve the above object of the invention, the present invention adopts the following technical solutions:

[0005] The present invention provides a device for suppressing ice-shedding jump of transmission lines, including a clamp, a fixed base, a cantilever beam, a connecting spring, and a sliding counterweight;

[0006] The clamp is arranged on the top of the fixed base for fixing the transmission line;

[0007] The cantilever beam is fixed on the upper part of the first side of the fixed base, the upper end of the connecting spring is connected to the cantilever beam, and its lower end is connected to the sliding counterweight.

[0008] The device further includes a first steel column, a second steel column, a safety link rod, and a safety spring;

[0009] Both the first steel column and the safety link rod are arranged on a second side adjacent to the first side, and the upper end of the safety spring is connected to the first steel column;

[0010] The first end of the safety link rod is connected to the fixed base by a hinge, and the lower end of the safety spring is connected between the second end of the safety link rod and the central position of the safety link rod;

[0011] The second steel column is fixed on the sliding counterweight and is used to press the second end of the safety link rod in a state where there is no de-icing or the de-icing amount does not reach the trigger condition.

[0012] The first steel column, the second steel column, and the cantilever beam are all fixed by welding or threaded connection.

[0013] A groove is provided at the lower part of the first side of the fixed base, and the sliding counterweight can slide up and down along the groove driven by the connecting spring.

[0014] The groove is a dovetail groove, and a protrusion is provided at the upper part of the side of the sliding counterweight connected to the fixed base, and the protrusion is embedded in the dovetail groove.

[0015] A first contact pad is embedded on the protrusion, and a second contact pad is embedded in the dovetail groove.

[0016] Both the first contact pad and the second contact pad are made of damping materials;

[0017] The damping material is any one of the following materials:

[0018] Rubber, plastic damping plate, damping composite material, high-damping alloy, and damping paint.

[0019] The stiffness of the safety spring and the weight of the sliding counterweight are both determined according to the structural parameters of the transmission line and the icing condition.

[0020] The structural parameters include the type, span, and height difference between spans of the transmission line.

[0021] The fixing method of the wire clamp to the transmission line includes any one of the following:

[0022] Bolt connection, crimping, and riveting.

[0023] Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] The transmission line de-icing jump suppression device provided by the present invention includes a wire clamp, a fixed base, a cantilever beam, a connecting spring and a sliding counterweight; the wire clamp is arranged on the top of the fixed base for fixing the transmission line; the cantilever beam is fixed to the upper part of the first side surface of the fixed base, the upper end of the connecting spring is connected to the cantilever beam, and the lower end thereof is connected to the sliding counterweight; a groove is provided at the lower part of the first side surface of the fixed base, and the sliding counterweight can slide up and down along the groove under the drive of the connecting spring, which can actively accelerate the consumption of vibration energy, quickly stop the vibration of the ground wire, and avoid damage to the transmission line;

[0025] The suppression device provided by the present invention is easy to install and has high reliability. The stiffness of the safety spring and the weight of the sliding counterweight can be specifically adjusted according to the structural parameters of the transmission line and the icing conditions, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a transmission line ice shedding jump suppression device according to an embodiment of the present invention;

[0027] Figure 2 is a partial cross-sectional view of an embodiment of the present invention;

[0028] In the figure, 1-transmission line, 2-clamp, 3-bolt, 4-first steel column, 5-safety spring, 6-safety link, 7-first contact pad, 8-fixed base, 9-sliding counterweight, 10-cantilever beam, 11-connecting spring, 12-second steel column, 13-second contact pad. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings.

[0030] The embodiment of the present invention provides a transmission line de-icing jump suppression device, the structure of which is shown in FIG. Figure 1 As shown, it specifically includes a wire clamp 2, a fixed base 8, a cantilever beam 10, a connecting spring 11 and a sliding counterweight 9; the specific connection relationship is as follows:

[0031] The wire clamp 2 is arranged on the top of the fixed base 8 and is used to fix the power transmission line 1;

[0032] The cantilever beam 10 is fixed to the upper part of the first side surface of the fixed base 8, the upper end of the connecting spring 11 is connected to the cantilever beam 10, and the lower end thereof is connected to the sliding counterweight 9; when the sliding counterweight 9 slides in the dovetail groove of the fixed base 8, the connecting spring 11 provides a reciprocating force for the sliding counterweight 9.

[0033] A groove is provided at the lower portion of the first side surface of the fixed base 8, along which the sliding counterweight 9 can slide up and down, driven by the connecting spring 11. The groove is a dovetail groove, and a protrusion is provided at the upper portion of the side surface where the sliding counterweight 9 connects to the fixed base 8. The protrusion engages with the dovetail groove, ensuring that the sliding counterweight 9 can slide within the dovetail groove of the fixed base 8.

[0034] like Figure 2 The above-mentioned protrusion is embedded with a first contact pad 7, and the dovetail groove is embedded with a second contact pad 13. When the protrusion of the sliding counterweight 9 slides in the dovetail groove of the fixed base 8, the first contact pad 7 and the second contact pad 13 rub against each other, consuming the vibration energy, so that the large vibration of the transmission line 1 caused by de-icing stops quickly.

[0035] The first contact pad 7 and the second contact pad 13 are both made of damping material;

[0036] The damping material is any one of the following:

[0037] Rubber, plastic damping panels, damping composite materials, high damping alloys and damping coatings.

[0038] The device provided in the embodiment of the present invention further includes a first steel column 4, a second steel column 12, a safety link 6 and a safety spring 5;

[0039] The first steel column 4 and the safety link 6 are both arranged on the second side surface adjacent to the first side surface, and the upper end of the safety spring 5 is connected to the first steel column 4;

[0040] The first end of the safety link 6 is connected to the fixed base 8 by a hinged manner, ensuring that the safety link 6 can rotate around the hinge point when it is actuated. The lower end of the safety spring 5 is connected between the second end of the safety link 6 and the center position of the safety link 6;

[0041] Second steel column 12 is welded or threadedly secured to sliding counterweight 9, and is used to press down the second end of safety link 6 when no ice is being shed or the amount of ice shed does not meet the triggering condition. When sliding counterweight 9 is not in operation, second steel column 12 rests on safety link 6, ensuring that sliding counterweight 9 and fixed base 8 remain relatively stationary. This balances the weight and inertia of sliding counterweight 9.

[0042] The first steel column 4 is in the same direction as the transmission line 1 , that is, the first steel column 4 is fixed perpendicularly to the first side of the fixed base 8 , and the second steel column 12 is fixed perpendicularly to the sliding counterweight 9 and perpendicular to the safety link 6 .

[0043] The above-mentioned wire clamp 2 is fixed to the transmission line 1 by bolt 3 connection, crimping or riveting, the first steel column 4 is fixed to the fixed base 8 by welding or threading, and the cantilever beam 10 is fixed to the first side of the fixed base 8 by welding or threading.

[0044] The stiffness of the safety spring 5 and the weight of the sliding counterweight 9 are both determined according to the structural parameters of the transmission line 1 and the icing condition, and the structural parameters include the type, span, and height difference between spans of the transmission line 1.

[0045] When the ice shedding occurs, the suppression device provided by the embodiment of the present invention is divided into the following two situations:

[0046] Situation 1: Less ice shedding

[0047] The entire suppression device vibrates up and down together with the ice-shedding transmission line 1. The resultant force of the safety spring 5 and the connecting spring 11 is greater than the self-gravity and inertial force of the sliding counterweight 9. The sliding counterweight 9 and the fixed base 8 remain relatively stationary. The entire suppression device only plays a role of pressing weight, which helps to reduce the amplitude of the transmission line 1 after ice shedding;

[0048] Situation 2: More ice shedding

[0049] The resultant force of the safety spring 5 and the connecting spring 11 is less than the self-gravity and inertial force of the sliding counterweight 9. The safety spring 5 and the safety connecting rod 6 act. The second steel column 12 drives the safety connecting rod 6 to rotate under the drive of the sliding counterweight 9 until the second steel column 12 slips off the safety connecting rod 6. Subsequently, under the action of the connecting spring 11, the sliding counterweight 9 and the fixed base 8 produce relative reciprocating sliding, and the first contact pad 7 and the second contact pad 13 generate friction, accelerating the consumption of vibration energy and making the vibration of the transmission line 1 caused by ice shedding stop as soon as possible.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Those of ordinary skill in the art can still modify or equivalently replace the specific implementation manners of the present invention with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of the claims of the present invention pending approval.

Claims

1. An ice-shedding jump suppression device for transmission lines, characterized in that It includes a wire clamp, a fixed base, a cantilever beam, a connecting spring and a sliding counterweight; The wire clamp is arranged on the top of the fixed base and is used for fixing the transmission line; The cantilever beam is fixed on the upper part of the first side surface of the fixed base. The upper end of the connecting spring is connected to the cantilever beam, and its lower end is connected to the sliding counterweight; The device further includes a first steel column, a second steel column, a safety connecting rod and a safety spring; The first steel column and the safety connecting rod are both arranged on the second side surface adjacent to the first side surface. The upper end of the safety spring is connected to the first steel column; The first end of the safety connecting rod is connected to the fixed base by a hinged manner. The lower end of the safety spring is connected between the second end of the safety connecting rod and the central position of the safety connecting rod; The second steel column is fixed on the sliding counterweight and is used for pressing the second end of the safety connecting rod in a state where there is no ice shedding or the ice shedding amount does not reach the triggering condition; The stiffness of the safety spring and the weight of the sliding counterweight are both determined according to the structural parameters of the transmission line and the icing condition; The structural parameters include the model, span and height difference between spans of the transmission line; A groove is provided at the lower part of the first side surface of the fixed base.

2. The ice shedding and galloping suppression device for transmission lines according to claim 1, wherein The first steel column, the second steel column and the cantilever beam are all fixed by welding or threaded connection.

3. The ice-shedding jump suppression device for transmission lines according to claim 1, characterized in that The sliding counterweight can slide up and down along the groove under the drive of the connecting spring.

4. The ice shedding and galloping suppression device for transmission lines according to claim 3, wherein, The groove is a dovetail groove. A protrusion is provided on the upper part of the side surface of the sliding counterweight connected to the fixed base, and the protrusion is embedded in the dovetail groove.

5. The ice-shedding jump suppression device for a power transmission line according to claim 4, wherein A first contact pad is embedded on the protrusion, and a second contact pad is embedded in the dovetail groove.

6. The ice shedding and galloping suppression device for transmission lines according to claim 5, characterized in that Both the first contact pad and the second contact pad are made of damping materials; The damping material is any one of the following materials: Rubber, plastic damping plate, damping composite material, high damping alloy and damping paint.

7. The ice-shedding jump suppression device for transmission lines according to claim 1, characterized in that The fixing method of the wire clamp to the transmission line includes any one of the following: Bolt connection, crimping and riveting.

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