A method for preventing power transmission line from swaying in the wind

Abstract

The invention discloses a method for preventing power transmission lines from being swung by wind, and provides a device for preventing power transmission lines from being swung by wind, including a ratchet-type quick-install ground anchor, an energy slow-release device, a conductor clamp, and an anchoring machine. The device for preventing power transmission lines from being swung by wind of the invention, when in use, selects a pull wire and an insulator string according to relevant regulations, connects the insulator string, the energy slow-release device, and the insulating pull wire, and then fixes the insulator string to the corresponding position of the conductor through a lossless conductor clamp, and then drives the insulating pull wire into a suitable ground through a ratchet-type quick-install ground anchor through an anchoring machine, or directly pulls the insulating pull wire to a nearby building. This method for preventing power transmission lines from being swung by wind can avoid damage to the conductor and the pole tower caused by a hard connection method of directly using an insulator string and an insulating pull wire to fix the conductor.

Description

Technical Field

[0001] The invention relates to a power transmission line supporting device, in particular to a method for preventing a power transmission line from swaying in the wind. Background Art

[0002] There are many typhoon disasters in coastal areas. Transmission lines often cause conductors to dance due to typhoons, causing the lines to discharge and trip on the tower body or even on buildings such as houses. The current design response measures mainly focus on installing heavy hammers. Although windproof wires and phase spacers are used in Xinjiang and other regions of my country, there are problems such as large land area, great construction difficulty and long construction period. In addition, there is no effective solution when the side conductors are close to the buildings and the land acquisition problem cannot be solved. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for preventing wind-induced swaying of power transmission lines which has a wind-proof effect and is easy to install.

[0004] A method for preventing a power transmission line from swaying in the wind, and a device for preventing a power transmission line from swaying in the wind are provided, comprising a ratchet-type quick-install ground anchor, an energy slow-release device, a conductor clamp and an anchor driver. When in use, a pull wire and an insulator string are selected according to relevant regulations, the insulator string, the energy slow-release device and the insulating pull wire are connected, and then the insulator string is fixed to the corresponding position of the conductor through the conductor clamp, and then the insulating pull wire is driven into a suitable ground through the ratchet-type quick-install ground anchor or the insulating pull wire is directly pulled to a nearby building.

[0005] The wind-proof dancing method for power transmission lines of the present invention can avoid damage to the conductors and pole towers caused by a hard connection method of directly fixing the conductors with insulator strings and insulating pull wires, and is suitable for fixing conductors near pole towers or buildings.

[0006] The specific arrangement of the method for preventing the power transmission line from dancing in the wind is as follows:

[0007] (1) For the lowest conductor of a single-circuit cathead tower or other types of straight towers, the quick-install ground anchor inclined method is used to prevent the conductor from dancing:

[0008] Select guy wires and insulator strings according to regulations, connect the insulator strings, energy release devices and guy wires in sequence, or connect another group of insulator strings, energy release devices and guy wires in series. Fix the insulator strings to the fixed conductors through conductor clamps, and then drive the connected wires into the ground at a certain angle to the pole tower through ground anchors, thereby forming an outward or vertically downward traction force on the conductors.

[0009] The method has the advantages of simple structure and convenient installation.

[0010] (2) When the wind force is strong at the location of the pole tower, the "H-shaped" pulling method of the quick-install ground anchor is adopted. The guy wire and insulator string are selected according to the regulations. It includes two groups of guy wire strings, and the guy wire strings include insulator strings, energy release devices and guy wires connected in sequence; the insulator string of one of the guy wire strings is clamped to the conductor through a conductor clamp, and the guy wire of the guy wire string is pulled to the pole tower; the insulator string of the other guy wire string is clamped to the conductor through a conductor clamp, and the guy wire end is driven into the ground through a ground anchor, and the two guy wire strings are arranged at an angle of "H" shape.

[0011] This method can make the conductor form a star-shaped force, and the anti-dancing effect is better.

[0012] (3) For suburban areas close to residential houses or other structures, where the surrounding terrain is not suitable for setting up guy wire anchors, a symmetrical "two-person" self-pulling method is used. The guy wire and insulator string are selected according to regulations, and a hard support rod is provided. The insulator string, one end of the hard support rod of the energy release device, the energy release device and the guy wire are connected in sequence. The other end of the hard support rod is hinged to the pole tower in a horizontal manner. The end of the guy wire is fixed to different positions of the pole tower, and the insulator string is clamped to the conductor through a conductor clamp.

[0013] The characteristic of this method is that the tower itself is used to form a guy wire, thereby suppressing the dancing of the conductor and not occupying the ground space.

[0014] (4) For double-circuit straight pole towers, the upper middle phase can adopt the double-pull method, and the lower phase can adopt any one of the "double-type" self-pull method, the quick-install ground anchor inclined pull method or the quick-install ground anchor "herringbone" pull method.

[0015] The ratchet-type quick-install ground anchor comprises an outer tube, one end of the outer tube is provided with an external thread, and also comprises a fixed end cap with an internal thread, the fixed end cap is covered with one end of the outer tube through a threaded cover, and a lifting ring for lifting is arranged on the fixed end cap, a screw rod is installed in the inner cavity of the outer tube, and a guide rod is also arranged in the outer tube, the screw rod is threadedly connected with the guide rod to drive the guide rod to move, a nut for rotating the screw rod is installed in the other end of the screw rod, a positioning piece for positioning the screw rod is arranged in the outer tube, the ratchet is installed on the guide rod, the installation of the ratchet on the guide rod is to open a long hole on the guide rod with a length equal to or greater than the length of the ratchet and distributed along the length direction of the guide rod, a pair of ratchet pawls are hinged at the lower end of the long hole, the ratchet can make relative opening and closing movements in the long hole, a long hole less than or equal to the length of the guide rod is opened at the corresponding position of the outer tube, the long holes on the outer tube are arranged opposite to each other in pairs, one end of the two ratchet pawls respectively extends out of two long holes arranged opposite to each other in the outer tube, and an anchor head is installed at the other end of the outer tube.

[0016] The ratchet-type quick-install ground anchor of the present invention has a ratchet placed in a retracted state at the beginning of use of the ground anchor. When in use, the fixed end cover is first unscrewed, and the ground anchor is driven into the soil by rotating the screw rod using an anchor driver or a manual wrench. The rotating screw rod drives the guide rod to move, and the ratchet then performs a relative opening movement to increase the pull-out resistance of the ground anchor. When the screw rod retracts inward, the ratchet performs a relative closing movement. When installation is completed, the fixed end cover is screwed on, and the insulating rope can be pulled to the lifting ring of the fixed end cover.

[0017] There are multiple pairs of ratchets, which are distributed on the guide rod at intervals, and the positions of the ratchets on the guide rod are staggered at a certain angle.

[0018] This arrangement of the pawls can improve the gripping force of the entire anchor.

[0019] A positioning ring for positioning the guide rod is arranged in the inner cavity of the outer tube.

[0020] The energy slow-release device comprises an outer shell and a piston. The piston performs reciprocating motion in the inner cavity of the outer shell. The piston is a hollow piston. A screw is installed in the inner cavity of the piston. The screw passes through the piston and the bottom of the outer shell. The outer shell and the screw are threadedly matched. The other end of the piston extends out of the outer shell. An end cover is arranged at the exposed end of the piston. The end cover is screwed on the exposed end of the piston. A spring is sleeved on the nut and the screw at the bottom of the piston. The gap between the end cover and the nut is the motion range of the piston. A threaded hole is arranged on the end cover. A fixing ring is assembled on the threaded hole. A fixing ring is arranged at the exposed end of the screw.

[0021] When the energy slow release device of the present invention is used, the insulator is connected to the fixing ring at the piston end, the insulating rope is connected to the fixing ring at the screw end, and then the insulating rope is connected to the pole tower. This connection method can avoid the hard connection of the pole tower caused by directly connecting the insulator to the pole tower and damaging the pole tower.

[0022] A gasket is arranged between the nut and the spring, and the spring is pressed on the gasket.

[0023] The conductor clamp is a lossless conductor clamp, in which a flexible bushing is arranged on the clamping surface of the clamp body.

[0024] The use of this loss-free wire clamp can avoid the wire dancing process and ensure that the wire clamp will not wear the wire.

[0025] The clamp body is a wire clamp.

[0026] A positioning ring 191 for positioning the guide rod is provided in the inner cavity of the outer tube.

[0027] In summary, the present invention has the following advantages over the prior art:

[0028] The method for preventing the power transmission line from dancing in the wind can fix the wires near the tower body or the buildings, thereby avoiding damage to the tower body or the nearby buildings caused by the dancing of the wires in windy weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the ratchet type quick-install ground anchor of the present invention.

[0030] Figure 2 It is a schematic diagram of the energy slow-release device for electric power operation of the present invention.

[0031] Figure 3 Schematic diagram of the wire clamp of the present invention.

[0032] Figure 4 yes Figure 3 Schematic cross-sectional view of .

[0033] Figure 5 It is a schematic diagram of the quick-install ground anchor oblique-staying method of the present invention.

[0034] Figure 6 It is a schematic diagram of the "herringbone" pulling method of the quick-install ground anchor.

[0035] Figure 7 It is a schematic diagram of the symmetrical "two-person" self-pulling method.

[0036] Figure 8 yes Figure 7 Schematic side view of .

[0037] Fig. 9 It is a schematic diagram of the double-return cross-arm "counter-pull" method.

[0038] Explanation of reference numerals 1 ratchet type quick-install ground anchor 11 outer tube 12 fixed end cover 12 1 lifting ring 13 screw rod 14 guide rod 15 nut 16 positioning piece 17 ratchet 18 long hole 19 anchor head 19 1 positioning ring 2 energy buffer device 21 housing 22 piston 23 screw rod 24 end cover 25 spring 26 fixing ring 3 conductor clamp 31 bushing 32 clamp body 4 insulator string 5 hard support 6 pull wire 7 conductor DETAILED DESCRIPTION

[0039] The present invention is described in more detail below with reference to the embodiments.

[0040] Example 1

[0041] A method for preventing a power transmission line from dancing in the wind, and a device for preventing a power transmission line from dancing in the wind are provided, comprising a ratchet-type quick-install ground anchor 1, an energy slow-release device 2, a conductor clamp and an anchor driving machine. When in use, a pull wire and an insulator string are selected according to relevant regulations, the insulator string, the energy slow-release device and the insulating pull wire are connected, and then the insulator string is fixed to the corresponding position of the conductor through the conductor clamp, and then the insulating pull wire is driven into a suitable ground through the ratchet-type quick-install ground anchor or the insulating pull wire is directly pulled to a nearby building.

[0042] The ratchet-type quick-install ground anchor comprises an outer tube 11, one end of which is provided with an external thread, and a fixed end cap 12 with an internal thread, the fixed end cap is covered with one end of the outer tube through a thread, and a lifting ring 121 for lifting is provided on the fixed end cap, a screw rod 13 is installed in the inner cavity of the outer tube, a guide rod 14 is also provided in the outer tube, the screw rod is threadedly connected with the guide rod to drive the guide rod to move, a nut 15 for rotating the screw rod is installed at the other end of the screw rod, and a screw rod 13 is provided in the outer tube to position the screw rod. The positioning piece 16 and the pawl 17 are installed on the guide rod. The pawl is installed on the guide rod by opening a long hole 18 on the guide rod with a length equal to or greater than the length of the pawl and distributed along the length direction of the guide rod. A pair of pawls are hinged at the lower end of the long hole. The pawl can make relative opening and closing movements in the long hole. Long holes less than or equal to the length of the guide rod are opened at corresponding positions of the outer tube. The long holes on the outer tube are arranged opposite to each other in pairs. One end of the two pawls extends out of two long holes in the outer tube that are arranged opposite to each other. An anchor head is installed at the other end of the outer tube. There are multiple pairs of pawls, which are distributed on the guide rod at intervals. The positions of the pawls on the guide rod are staggered at a certain angle. A positioning ring is arranged in the inner cavity of the outer tube to position the guide rod. 191.

[0043] The energy slow-release device 2 includes a housing 21 and a piston 22. The piston reciprocates in the inner cavity of the housing. The piston is a hollow piston. A screw 23 is installed in the inner cavity of the piston. The screw passes through the piston and the bottom of the housing. The housing and the screw are threaded. The other end of the piston extends out of the housing. An end cap 24 is arranged at the exposed end of the piston. The end cap is screwed on the exposed end of the piston. A spring 25 is mounted on the nut and the screw at the bottom of the piston. The gap between the end cap and the nut is the range of motion of the piston. A threaded hole is arranged on the end cap. A fixing ring 26 is assembled on the threaded hole. A fixing ring is arranged at the exposed end of the screw. A gasket is arranged between the nut and the spring, and the spring presses on the gasket.

[0044] The conductor clamp 3 is a lossless conductor clamp, in which a flexible bushing 31 is provided on the clamping surface of the clamp body 32 .

[0045] The specific arrangement of the wind-proof galloping method for transmission lines is as follows:

[0046] (I) For the lowest conductor of a single-circuit cathead tower or other types of straight towers, the quick-install ground anchor inclined pull method can be used to prevent the conductor from dancing. The method is characterized by simple and convenient construction. The brief steps of the construction method are as follows:

[0047] (1) Check the tower inventory and make two sets of guy wires of corresponding lengths according to the tower nominal height.

[0048] (2) Select insulator strings of corresponding lengths according to different voltage levels, and connect them in sequence according to the drawings in combination with the energy release devices at both poles to form a set of insulated wires.

[0049] (3) Install a non-destructive conductor clamp near both sides of the suspension insulator string 4 of the phase conductor 7 to be installed or in the middle of the stage.

[0050] (4) Install the insulated wire connected in step 2 under the non-destructive wire clamp.

[0051] (5) Ground personnel drive the ratchet-type quick-install ground anchor into the soil at a suitable location based on the site terrain.

[0052] (6) Install the ground end of the insulated pull wire on the ground anchor to exert an outward or vertical downward traction force on the wire.

[0053] Other matters:

[0054] (1) This method can also be installed in an equipotential manner when the line is energized, which can avoid line power outages.

[0055] (2) When located at the edge of a residential building or other structure and the insulated wire cannot form an angle with the ground, the anchor position can be located directly below the conductor. If necessary, the single string of the conductor suspension insulator can be changed to a double string.

[0056] (3) Based on operating experience, this method can choose to install one set on the large span side, or one set on each side of the suspended insulation string.

[0057] (II) Quick-install ground anchor "herringbone" pulling method

[0058] According to operational experience, if the wind force at the location of the tower is strong and the "quick-installed ground anchor inclined pulling method" cannot meet the requirements, the quick-installed ground anchor "herringbone" pulling method can be used. The characteristic of this method is that it can make the conductor form a star-shaped force, and the anti-dancing effect is better. The construction method is briefly described as follows:

[0059] (1) Check the tower inventory and make a set of guy wires of corresponding length according to the tower nominal height.

[0060] (2) Select an insulator string of corresponding length according to different voltage levels, combine the bipolar energy release device and the pull wire in step 1, and connect them in sequence according to the drawings to form a set of insulating pull wires.

[0061] (3) Select insulator strings of corresponding lengths according to different voltage levels, and connect them in sequence according to the drawings in combination with the two-pole energy release devices to form a set of insulating pull rods.

[0062] (4) Install non-destructive conductor clamps at appropriate locations on both sides of the phase conductor suspension insulator string to be installed.

[0063] (5) Install the insulated wire connected in steps 2 and 3 under the non-destructive wire clamp.

[0064] (6) Install the insulating tie rod in step 3 on the main material of the tower, forming an obtuse angle with the suspension insulator string.

[0065] (7) Ground personnel drive the ratchet-type quick-install ground anchor into the soil at a suitable location based on the site terrain.

[0066] (8) Install the ground end of the insulated pull wire on the ground anchor to exert an outward or vertical downward traction force on the wire.

[0067] Other matters:

[0068] (1) This method can also be installed in an equipotential manner when the line is energized, which can avoid line power outages.

[0069] (2) Depending on the spacing between the poles and towers on site, the single string of conductor suspension insulators can be changed to a double string if necessary.

[0070] (3) Based on operating experience, this method can choose to install one set on the large span side, or one set on each side of the suspended insulation string.

[0071] (III) Symmetrical “two-person” self-pulling method

[0072] The symmetrical "double-type" self-pull method is applicable to suburban areas close to residential buildings or other structures, and the surrounding terrain is not suitable for setting up anchor wires. The characteristic of the symmetrical "double-type" self-pull method is that the tower itself is used to form the guy wire 6, thereby suppressing the dancing of the wire and not occupying the ground space. The construction method is briefly described as follows:

[0073] (1) Select the corresponding length of insulator string according to different voltage levels, and connect the two-pole energy release device, hard support 5 and guy wire in sequence according to the drawings.

[0074] (2) Install non-destructive conductor clamps at appropriate locations on both sides of the phase conductor suspension insulator string to be installed.

[0075] (3) Install the device connected in step 1 under the non-destructive wire clamp.

[0076] (4) Fix the other end of the hard support to the main material of the tower by means of a hinge connection, so that it is roughly horizontal.

[0077] (5) Fix the end of the guy wire to the main material of the tower (the overall tightness is adjusted by the UT wire clamp of the steel strand).

[0078] Other matters:

[0079] (1) This method can also be installed in an equipotential manner when the line is energized, which can avoid line power outages.

[0080] (2) Depending on the spacing between the poles and towers on site, the single string of conductor suspension insulators can be changed to a double string if necessary.

[0081] (3) Based on operating experience, this method can choose to install one set on the large span side, or one set on each side of the suspended insulation string.

[0082] (IV) Double-circuit cross arm "pull-to-pull" method

[0083] For double-circuit straight pole towers, the upper and middle phases can be pulled together, and the lower phase can be pulled by the "double-person type" self-pulling method, the quick-install ground anchor inclined pulling method, or the quick-install ground anchor "herringbone" pulling method. The characteristic of this method is that the construction of the upper phase is relatively simple. The specific construction steps are as follows:

[0084] (1) Upper and middle phases:

[0085] 1) Select insulator strings of corresponding lengths according to different voltage levels, and connect them in sequence according to the drawings in combination with the two-pole energy release devices to form a set of insulating pull rods.

[0086] 2) Install non-destructive conductor clamps at appropriate positions on both sides of the phase conductor suspension insulator string to be installed.

[0087] 3) Connect one end of the insulating pull rod assembled in step 1 to the lossless wire clamp and the other end to the lower cross arm to complete one phase.

[0088] (2) Lower phase:

[0089] 1) Select insulator strings of corresponding lengths according to different voltage levels, and connect them in sequence according to the drawings in combination with the bipolar energy release devices, hard supports and guy wires.

[0090] 2) Install non-destructive conductor clamps at appropriate positions on both sides of the phase conductor suspension insulator string to be installed.

[0091] 3) Install the device connected in step 1 under the non-destructive wire clamp.

[0092] 4) Fix the other end of the hard support to the main material of the tower by hinge connection, in a roughly horizontal state.

[0093] 5) Fix the end of the guy wire to the main material of the tower (the overall tightness is adjusted by the UT wire clamp of the steel strand).

[0094] Other matters:

[0095] (1) The key point of this method is to determine the air gap between the upper, middle and lower cross arms. When the operator is located under the newly installed insulating rod, if the human body exceeds the insulating part of the insulating rod (the red frame position in the figure below), this method is not applicable to this tower.

[0096] (2) This method can also be installed when the line is energized, using a combination of equipotential and ground potential to avoid line power outages.

[0097] According to operating experience, this method can choose to install one group on the large span side, or one group on each side of the suspended insulation string.

[0098] The parts not described in this embodiment are the same as those in the prior art.

Claims

1. A method for preventing power transmission lines from dancing in the wind, characterized in that: Provided is a transmission line wind-proof dancing device, comprising a ratchet-type quick-install ground anchor, an energy slow-release device, a conductor clamp and an anchor driver. When in use, a pull wire and an insulator string are selected according to relevant regulations, the insulator string, the energy slow-release device and the insulating pull wire are connected, and then the insulator string is fixed to the corresponding position of the conductor through the conductor clamp, and then the insulating pull wire is driven into a suitable ground through the ratchet-type quick-install ground anchor or the insulating pull wire is directly pulled to a nearby building; the transmission line wind-proof dancing method, the specific arrangement of which is: (1) For the lowest conductor of a single-circuit cathead tower or other types of straight towers, the quick-install ground anchor inclined method is used to prevent the conductor from dancing: Select the guy wire and insulator string according to the regulations, connect the insulator string, energy release device and guy wire in sequence, or connect another group of insulator strings, energy release device and guy wire in series, fix the insulator string to the conductor through the conductor clamp, and then drive the connected wires into the ground through the ground anchor at a certain angle with the tower, so as to form an outward or vertical downward traction force on the conductor; (2) When the wind force is strong at the location of the pole tower, the "H-shaped" pulling method of the quick-install ground anchor is adopted. The guy wire and insulator string are selected according to the regulations. It includes two groups of guy wire strings, and the guy wire strings include insulator strings, energy slow release devices and guy wires connected in sequence; the insulator string of one of the guy wire strings is clamped to the conductor through a conductor clamp, and the guy wire of the guy wire string is pulled to the pole tower. The insulator string of the other guy wire string is clamped to the conductor through a conductor clamp, and the guy wire end is driven into the ground through a ground anchor. The two guy wire strings are arranged at an angle of "H"; (3) For suburban areas close to residential buildings or other structures, where the surrounding terrain is not suitable for setting up anchor wires, a symmetrical "two-person" self-pulling method is used. The pull wire and insulator string are selected according to the regulations, and a hard support rod is provided. The insulator string, one end of the hard support rod of the energy slow release device, the energy slow release device and the pull wire are connected in sequence. The other end of the hard support rod is hinged to the pole tower in a horizontal manner. The end of the pull wire is fixed to different positions of the pole tower, and the insulator string is clamped to the conductor through a conductor clamp; (4) For double-circuit straight pole towers, the upper and middle phases adopt the double-pull method, and the lower phase adopts any one of the "double-type" self-pull method, the quick-install ground anchor inclined pull method or the quick-install ground anchor "herringbone" pull method; The ratchet-type quick-install ground anchor comprises an outer tube, one end of which is provided with an external thread, and a fixed end cap with an internal thread, the fixed end cap is covered with one end of the outer tube through a threaded cover, and a lifting ring for lifting is arranged on the fixed end cap, a section of screw rod is installed in the inner cavity of the outer tube, a guide rod is also arranged in the outer tube, the screw rod and the guide rod are threadedly connected to drive the guide rod to move, a nut for rotating the screw rod is installed at the other end of the screw rod, a positioning piece for positioning the screw rod is arranged in the outer tube, the ratchet is installed on the guide rod, the ratchet is installed on the guide rod as a long hole with a length equal to or greater than the length of the ratchet and distributed along the length direction of the guide rod, a pair of ratchet pawls are hinged at the lower end of the long hole, the ratchet can make relative opening and closing movements in the long hole, a long hole less than or equal to the length of the guide rod is opened at the corresponding position of the outer tube, and the long hole on the outer tube They are arranged opposite to each other in pairs, and one ends of the two pawls extend out of two long holes arranged opposite to each other in the outer tube, and an anchor head is installed at the other end of the outer tube; there are multiple pairs of pawls, and the pawls are distributed on the guide rod at intervals, and the positions of the pawls on the guide rod are staggered at a certain angle; the energy slow-release device includes an outer shell and a piston, and the piston reciprocates in the inner cavity of the outer shell. The piston is a hollow piston, and a screw is installed in the inner cavity of the piston. The screw passes through the piston and the bottom of the outer shell, and the outer shell and the screw are threadedly matched. The other end of the piston extends out of the outer shell, and an end cover is provided at the exposed end of the piston, and the end cover is screwed on the exposed end of the piston. A spring is mounted on the nut and the screw at the bottom of the piston, and the gap between the end cover and the nut is the movement range of the piston. A threaded hole is provided on the end cover, and a fixing ring is assembled on the threaded hole, and a fixing ring is provided at the exposed end of the screw.

2. The method for preventing power transmission line from dancing in the wind according to claim 1, characterized in that: A positioning ring for positioning the guide rod is arranged in the inner cavity of the outer tube.

3. The method for preventing power transmission line from dancing in the wind according to claim 1, characterized in that: A gasket is arranged between the nut and the spring, and the spring is pressed on the gasket.

4. The method for preventing power transmission line from dancing in the wind according to claim 1, characterized in that: The conductor clamp is a lossless conductor clamp, in which a flexible bushing is arranged on the clamping surface of the clamp body.

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