Device for removal of ice coating from wires of overhead transmission lines

IPC classes for russian patent Device for removal of ice coating from wires of overhead transmission lines (RU 2504878):

H02G7/16 - Devices for removing snow or ice from lines or cables (from insulators H01B0017520000)

Another patents in same IPC classes:

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Device to melt glazed frost on overhead power transmission lines named after stepan filipchuk / 2482585

Device for melting glazed frost comprises a device for heating of wires of overhead power transmission lines, comprising a latticed metal plate, which is connected with a spring in the form of a bus placed in a pipe from an insulating material and fixed to the support of the overhead power transmission line, an electric contact, which via an alternating resistor and a fuse is connected to one or two wires of the overhead power transmission line, and also an electric contact fixed to the latticed plate and connected to a radio transmitter that switches on as glazed frost is deposited onto the latticed plate.

Device to dump icing deposits from wires / 2481684

Device is a rectangular frame placed on a wire 1, and opposite sides 2, 3 of the frame are made as plate permanent magnets, magnetised axially and facing each other with different poles, and two other sides in the form of plates 4, 5, fixed to magnets by means of screws 6 and threaded bushings 7, at the same time plates are equipped with the central part with protruding cylindrical strikers 8, 9 with bushings 10, 11 of elastic material freely placed on them, which create a rated gap 12 with the wire surface.

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Device for removing snow and ice cover from conductors of power transmission lines / 2478245

Device includes identical galvanically isolated generators of high-power current pulses 1, the number of which corresponds to the number of controlled PTL. Each generator is separately connected to split-phase conductors of the corresponding controlled PTL sections. Device also includes monitoring devices 2 installed along PTL on supports of power transmission lines. Each of the glaze ice hazard monitoring and warning devices 2 includes glaze ice loads sensor 3 (GLS), digital code shaper 4, controller 5 for conversion of a digital code to time interval as per pulse-time modulation (PTM) rule, self-contained power supply unit 6, radio transmitter 7 for transmission via a radio channel to the dispatch station of warning and control commands of PTL protection system against glaze ice formations. Device also includes electric substation 8 including generators of high-power current pulses 1 as per the number of controlled PTL; radio receiving devices 9 (RPU-l-RPU-n) as per the number of high-power current pulse generators for receiving from monitoring devices 2 of signals with commands for automatic actuation of PTL protection system against glaze ice formations, dispatcher workstation 10 and illuminated panel 11 with PTL monitoring data and taken safety measures.

Melting method of glaze ice on 6( 10 ) kv overhead transmission lines / 2478244

According to the proposed method, artificial three-phase short circuit (SC) is performed at the end of the overhead transmission line (OTL), voltage is supplied to OTL, phase conductors of OTL are heated with increased current causing glaze ice melting on conductors, and SC is eliminated on OTL after the melting process is completed. At that, accurate adjustment of the melting process is performed to parameters of OTL conductors and glaze ice deposits using a thermal model of conductor and mathematical model of glaze ice melting. Using a switching module, one of three cyclic melting modes, and namely semiautomatic mode, semiautomatic mode with melting depth control, and automatic mode is performed. In the proposed methods, the mode is guaranteed, at which the temperature of the hottest OTL section does not exceed the allowable value. In the automatic mode, melting is performed automatically and continued till glaze ice with the specified parameters is molten. The user has the possibility of following-up the melting process based on melting depth data and design temperature of the hottest conductor, which is received from the melting station.

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FIELD: electricity.

SUBSTANCE: device for removal of snow slush and ice coating (1) from wires (2) includes an element (3) for pulsed shaking up of wires which is activated by weight of coating; it is in-built in mechanical circuit of wire suspension to support (4) by means of pin insulator (5) forced on to arched end of the pin (6). Rectangular window (7) with grooves (8) at both sides is cut in the support; element (3) is made as a flexible and resilient rectangular plate being part of a hollow cylinder; it represents non-linear relay element with two stable conditions and transition from one condition to another by blasting at critical value of environmental load. The pin is fixed (6) at the plate by screws (11) and connected by wire rope section (12) inserted freely through hole and equipped with suspended weight (15) at the end.

EFFECT: increasing efficiency and simplifying design.

2 dwg

The invention relates to the field of electricity and can be used for the mechanical removal of ice deposits from the wires of overhead power lines.

Known devices for mechanical reset of wet snow and ice deposits from the wires of overhead power lines by the span of the elements for pulsed shaking wires and shock spring elements /see A.S. USSR №754541, CL H02G 7/00, 1978 [1]; A.S. USSR №811382, CL H02G 7/16, 1978 [2]; A.S. USSR №1415309, CL H02G 7/16, 1986 [3]; A.S. USSR №700888, CL H02G 7/00, 1986 [4]/.

The disadvantages of the known devices is the inability to automatically reset the deposits on the wires at reaching their weight dangerous values, the significant complexity of the structures, due to the need of using elements with special physical effects, shorts, ground cables, of materials with shape memory effect /APP/, the additional costs of electricity, narrow use, limited in each case by the specific designs of the line.

It is also known a device for discharge of sediments from the wires of the power lines containing the hammer hitting the wire, the actuator acting on the weight of the sediments and in the form of spatial kinematic spring lever-tooth is atogo mechanism, fitted with a toothed rack, ratchet and toothed sector /see A.S. the USSR # 252438, CL H02G 7/16, 1967 [5]/.

The disadvantages of the known devices are the ultimate design complexity, limited functionality and applications, the low efficiency of discharge of sediments and reliability.

The model supports of overhead lines mechanical suspension chain wire to pin insulator consists of a hook and a threaded pin freely inserted threaded side into the hole in the support and secured by a nut /see, for example, K.M. Poyarkov “power plants, substations, lines and networks”, M., 1971, str-234 [6]/.

However, there is in principle no relief devices deposits with wires, disrupting their parasitic oscillations, etc.

The closest device to the same destination to the proposed device, the set of essential features for a device to reset the icy sediments from the wires of the power lines containing the hammer hitting the wire under the weight of the sediments, and made the type of spring scales, built-in mechanical suspension chain wire to the insulator, kinematically connected to its fixed rod with swivel handle of the hammer by means of the swivel rocker and pushrod, coupled between the battle through teeth /see as the USSR №115292, CL H02G 7/16, 1967 [7], and adopted as a prototype.

The drawbacks of the prototype are limiting the complexity of the design, the low efficiency of discharge of sediments and reliability, limited functionality and applications. The presence of deposits on the wires under certain wind perturbations leads to resonant vibrations, low-frequency oscillation type “dance”, resulting in damage to overhead power lines. Your prototype is practically no possibility of failure of these modes and adjust the preset nominal values of the tension wires that ultimately limits its functionality.

The invention consists in creating devices that provide automatic reset glaze deposits with wires at achieving weight sediment values greater than the maximum allowable, Vistanova nominal values of the tension wires of this type of failure occur hazardous vibrational modes of the wires due to the inclusion of the mechanical suspension chain wire relay member which provides at its trigger pulse shaking wires at critical weight and vibration loads.

The technical result is to simplify the design of the device, the improvement effect is vnesti reset ice deposits, extending the functionality of the device.

This technical result in the implementation of the invention is achieved in that in the known device to reset glaze deposits with wires of power lines, comprising an element for pulse shaking wires acting on the weight of the sediments and built-in mechanical suspension chain wire to the support using a pin insulator, the peculiarity lies in the fact that in the support zone of the suspension wire cut a rectangular through a window provided with side blind slots on two opposite sides, and an element for pulse shaking the wire is made in the form of a flexible elastic rectangular plate, which is part of a hollow cylinder, and represents a non-linear relay element with two stable States and transitions from one state to another cotton when reaching the external load, the critical values of R_krwhen this plate is freely inserted in the grooves with an overlap to cut open the sides of the grooves and with partial overlapping of the window in the opposite transverse direction, the threaded end of the pin insulator is introduced into the hole in the plate, fixed to the latter by means of screws and is connected to the cable freely passed through aligned pin hole is made in parallel attached to op the d bracket, and provided attached to the end and freely hanging down load, weight, equal to the nominal value of the tension of this wire, and necessary for cotton critical load of the plate P_krassociated with the maximum permissible weight of ice depositson the wire ratio.

The invention is illustrated by drawings, where figure 1 schematically illustrates the proposed device in side view with a longitudinal slit /solid lines shows the position of the device in the initial state, the dotted triggered when the critical load/; figure 2 is a view As in figure 1.

The device to be reset wet snow and ice deposits 1 to 2 wires of the transmission line includes item 3 for pulse shaking wires 2, acting on the weight of the sediments 1 and built-in mechanical suspension chain wire 2 to the support 4 by means of pin insulator 5 mounted on the bent end of the pin 6. In the support 4 in the area of the suspension to it wire 2 cut a rectangular through-window 7, provided with side blind grooves 8 from two opposite sides of the window 7, and item 3 for pulse shaking the wire 2 is made in the form of a flexible elastic rectangular plate, which is part of a hollow cylinder and representing not inany relay element with two stable States and a transition from one state to another cotton when reaching the external load on the plate 3 critical values of R _kr. This plate 3 is freely inserted into the grooves 8 with an overlap on the window cutout 7 side grooves 8 and with its incomplete overlap in the opposite transverse direction. Threaded end 9 of the pin 6 of the insulator 5 is introduced into the opening 10 in the plate 3 fixed to the latter by means of nuts 11 on both sides of the plate 3 and is connected with a piece of rope 12, freely conceded through aligned pin 6 hole 13 made in parallel attached to the support 4 of the bracket 14. Cut the cable 12 attached to the end 9 of the pin 6 through the holes in the pin /hole figure not shown/. By the end passing through the hole 13 cut the rope 12 is bound cargo 15, freely hanging down along the bracket 14 and which has a weight of P, equal to the nominal value of the T tension this wire. It is necessary for cotton critical load plate 3 R_krassociated with the maximum permissible weight of ice deposits 1on the wire 2 ratio. Execution of the elastic plates 3 with two stable States for a long time and worked out in sufficient detail (see, for example, as the USSR №1203260, CL F16F 1/10, 1984 [8]; A.S. USSR №1798560, CL F16F 1/10, 1989 [9]/. When inserted into the grooves 8 of the plate 3 is forcibly compressed in one of the transverse directions, in which it has an overlap on the neckline okna to increase its convexity /along the vertical axis in figure 2/, and in this state is inserted into the window 7, after which the plate 3 itself is dispersed and its top and bottom in figure 2 edges freely positionable in the slots 8. In the opposite transverse direction /along the horizontal axis in figure 2/ plate 3 width narrower Windows 7. Thus, when the clapping in the process of working plate 3 in each of its two stable States /see figure 1/ plate 3 can go almost his entire body outside the window 7 and the other side attached in the grooves 8 of the support 4 only their upper and lower edges, which when clapping freely moved in the vertical in figure 1 and figure 2 direction. Naturally, the force introduction plates 3 in the grooves 8 when installing the pre-compression force should be substantially to plate 3 is not released from the slots 8 in the process of operational loads.

The operation of the device is as follows.

In the initial position, the plate 3 is in its first stable state with the convexity to the left in figure 1 /shown in solid lines/. If cargo 15 was not, in this state, the plate 3 would not be loaded. However, due to the weight P of the load 15 is some deformation of the plate 3 to the left in the direction of increasing its convexity, thereby creating a nominal tension of the wire 2 R=So Necessary batteries what s the value of the tension T for a given line is determined by the desired deflection by means of a mounting table /see, for example, [6], p. 249/. Thus, the first wire 2 is fixed on the insulator 5 and without tension is assembled from elements 2, 3, 4, 5, 6 mechanical chain suspension wires 2, after which the load 15 is given the tightness T=P /plate 3 is provided from the unloaded state with convexity to the left in figure 1 in the loaded state with increasing convexity. Further, under normal operating conditions, the line and remains above the state of the mechanical circuit of the suspension wire 2. However, with the increasing weight of wet snow and ice deposits 2-wire 2 increases its tension, SAG, and, accordingly, is monotonic deformation of the plate 3 to the right with the reduction of its original convexity to the left. Upon reaching the weight of the sediments 1 the maximum values ofthat is determined by the maximum allowable SAG of this wire 2/, see [6], str/ should happen cotton plate 3 in the second stable position with convexity to the right (see dashed line in figure 1/. Naturally, this cotton will happen if the condition in/1/, where P_CR.- critical load of the plate 3, is essential for its cotton. In the cotton is pulsed shaking the wire 2, and accordingly, the discharge of sediment . In this case, provided that R≥R_kr/2/ will not happen immediately reverse the cotton plate 3 to the left in the first stable state with the convexity to the left, that is, the device is again ready for operation. Of /1/ and /2/ easily obtainable one condition. or/2. Thus, after selecting a sample size T=P the efficiency of the device is practically determined by the necessary relay selection characteristics of the elastic plate 3 with a given value of the critical load of cotton P_kr. Immediately indicate that such a selection in practice is very simple, because the value ofnot critical, i.e. can be determined about quite widely. Accordingly about can be picked up and plate 3 with a given value of P_kr. When you set a specific nominal value of wire tension T in some cases it is expedient to combine the suggestion with the help of cargo 15 weight R with known variants, described in detail in [6] on str-249. In the event that because of the presence of the wire 2 ice deposits 1 or due to wind disturbances /or both/ dangerous vibrational modes of the wires 2 /of the resonances, “dance”, etc./ proposed device when cotton is lastine 3 provides almost instant failure of this mode with the offset of the oscillating system.

Thus, compared with the device-prototype [7] the proposed device is extremely simple design and reliability by eliminating complex spatial kinematic drive mechanism, increased efficiency of discharge of ice deposits, carried out not by the local hammer and pulse shaking the wire and also expand the functionality of the device by implementing them in addition to the discharge of sediments functions vystavki specified nominal tension wires and automatic stall dangerous vibration modes of the wires in case of their occurrence. Specifically, you specify that the configuration of the above described device it is possible to carry out periodic, frequent shaking of the wires with a relatively small weight of ice deposits on them that will allow you to reset the deposits already at the initial stage of their occurrence, which, of course, greatly facilitates the reset process in advance and prevents dangerous vibrational modes and wires.

The relief device glaze deposits with wires of power lines, comprising an element for pulse shaking wires acting on the weight of the sediments and built-in mechanical suspension chain wire to the support using the pin out is atora, characterized in that the support in the area of the suspension wire cut a rectangular through a window provided with side blind slots on two opposite sides, and an element for pulse shaking the wire is made in the form of a flexible elastic rectangular plate, which is part of a hollow cylinder, and represents a non-linear relay element with two stable States and a transition from one state to another cotton when reaching the external load, the critical values of R_krwhen this plate is freely inserted in the grooves with an overlap to cut open the sides of the grooves and with its incomplete overlap in the opposite transverse direction, the threaded end of the pin insulator is introduced into the hole in the plate, fixed to the latter by means of screws and is connected to the cable freely passed through aligned pin hole is made in parallel attached to the support bracket, and has attached to its end and freely hanging down load weights equal to the nominal value of the tension of this wire, and necessary for cotton critical load of the plate P_krassociated with the maximum permissible weight of ice depositson the wire ratio.