A device for effectively suppressing wind deviation of optical cable or ground wire

Abstract

The present invention discloses a device for effectively suppressing wind deviation of an optical cable or ground wire, comprising a fixing mechanism, a pulley mechanism and a steel wire rope, wherein: the fixing mechanism comprises sub-conductor spacers respectively arranged on the conductors on both sides of the pole tower, and the two sub-conductor spacers are connected by interlaced spacers; the pulley mechanism is installed on a traction rope or an optical cable / ground wire connected thereto, one end of the traction rope is connected to a traction machine, and the other end of the traction rope is connected to the optical cable / ground wire; the traction rope drives the optical cable / ground wire to pass through the pulley mechanism; the pulley mechanism is connected to the sub-conductor spacers on both sides below it by steel wire ropes, forming a triangular structure in a vertical plane. The present invention can actively solve the state of excessive wind deviation when an optical cable or ground wire is deployed, and compared with completely setting up a spanning frame sealing net and setting up a load-bearing cable sealing net, the wind deviation reduction effect is significant and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power construction, and in particular to a device that effectively suppresses wind deviation of an optical cable or a ground wire. Background Art

[0002] During the construction of the optical cable reconstruction project, when writing the crossing technical plan, according to the actual data on site, it was found that the wind deviation of the optical cable exceeded the boundary of the sealing net (sealing the net with wires) in many places. If the sealing method is changed to seal the net by setting up a crossing frame, although it can meet the requirements of the specification, it will increase the cost investment and construction risks.

[0003] At present, when laying out transmission lines, the traditional method is to set up a spanning frame to seal the network when passing through important spans. However, in technical transformation projects, this construction method will increase construction costs, construction period, and risks. The traditional method of spanning important spans is a "passive" protection concept, which is greatly affected by factors such as the wind deflection of the spanning object, the width of the spanned object, and the spanning angle. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention provides a device for effectively suppressing wind deviation of an optical cable or a ground wire.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A device for effectively suppressing wind deviation of an optical cable or ground wire, comprising a fixing mechanism, a pulley mechanism and a steel wire rope, wherein:

[0007] The fixing mechanism comprises sub-conductor spacer bars respectively arranged on the conductors on both sides of the tower, and the two sub-conductor spacer bars are connected by an interphase spacer bar;

[0008] The pulley mechanism is installed on the traction rope or the optical cable / ground wire connected to it. One end of the traction rope is connected to the traction machine, and the other end of the traction rope is connected to the optical cable / ground wire. The traction rope drives the optical cable / ground wire to pass through the pulley mechanism.

[0009] The pulley mechanism is connected to the sub-conductor spacer bars on both sides below it through steel wire ropes, forming a triangular structure in a vertical plane.

[0010] Furthermore, the device for effectively suppressing wind deviation of the optical cable or ground wire is arranged near the top of the object being spanned or on one side of the top or on both sides of the top.

[0011] Further, the pulley mechanism includes a horizontal support plate, and vertical pulley groups are respectively arranged at the left and right ends of the lower side of the horizontal support plate, and each set of vertical pulley groups consists of two vertical pulleys that are spaced apart and parallel to each other in the front and back directions; vertical plates extending downward are also fixed at both ends of the horizontal support plate, and the vertical plates are located on the outside of the vertical pulley groups, and horizontal pulleys spaced apart and parallel to each other in the upper and lower directions are arranged between the two vertical plates, and the two horizontal pulleys pass through the middle interval of each set of vertical pulley groups, and the upper horizontal pulley is arranged close to the horizontal support plate, and the lower horizontal pulley is connected to the two vertical plates through a quick-release structure;

[0012] A pulley-enclosed channel is formed between the two vertical pulley blocks and the two horizontal pulleys. The pulley-enclosed channel forms an entrance and an exit through the lower horizontal pulley and the quick-release structure. The traction rope or the optical cable / ground wire connected to it enters the pulley-enclosed channel through the entrance and exit and passes through the pulley-enclosed channel.

[0013] The horizontal support plate and / or the vertical plate are provided with connecting rings, and the connecting rings are used to connect the steel wire ropes.

[0014] Furthermore, one end of the central axis of the lower horizontal pulley is hingedly connected to one side vertical plate through a connecting seat, and the other end of the central axis of the lower horizontal pulley is plug-connected to the other side vertical plate through a connecting pin to form a quick-release structure.

[0015] Furthermore, the sub-conductor spacer is a split-type spacer, which is provided with through holes corresponding to the sub-conductors, and the frame of the split-type spacer is provided with hanging rings for connecting the steel wire rope.

[0016] Beneficial effects of the present invention:

[0017] (1) Actively solve the problem of excessive wind deviation when laying out optical cables or ground wires. Compared with completely setting up a spanning frame sealing net or a load-bearing cable sealing net, it can significantly reduce wind deviation and reduce costs.

[0018] (2) The device through which the optical cable or ground wire passes adopts a pulley mechanism with all-round built-in pulleys to reduce wear and tear on it while not affecting the laying of the optical cable or ground wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a system schematic diagram of this embodiment;

[0020] Figure 2 is a front view of the pulley mechanism in this embodiment;

[0021] Figure 3 is a side view of the pulley mechanism in this embodiment;

[0022] Figure 4 is a three-dimensional schematic diagram of the split spacer bar in this embodiment;

[0023] Figure 5 This is a schematic diagram before application of this embodiment;

[0024] Figure 6 This is a schematic diagram after application of this embodiment.

[0025] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] like Figures 1 to 4 As shown, this embodiment provides a device for effectively suppressing wind deviation of an optical cable or a ground wire, comprising a fixing mechanism, a pulley mechanism 2 and a steel wire rope 3. Among them:

[0028] The fixing mechanism comprises sub-conductor spacer bars 11 respectively arranged on the conductors on both sides of the tower, and the two sub-conductor spacer bars 11 are connected by an interphase spacer bar 12;

[0029] The pulley mechanism 2 is installed on the traction rope or the optical cable / ground wire connected to it, one end of the traction rope is connected to the traction machine, and the other end of the traction rope is connected to the optical cable / ground wire; the traction rope drives the optical cable / ground wire to pass through the pulley mechanism 2;

[0030] The pulley mechanism 2 is connected to the sub-conductor spacer bars 11 on both sides below it through steel wire ropes 3, forming a triangular structure in a vertical plane.

[0031] In this embodiment, the pulley mechanism 2 includes a horizontal support plate 21, and vertical pulley groups are respectively arranged at the left and right ends of the lower side of the horizontal support plate 21, and each set of vertical pulley groups is composed of two vertical pulleys 22 that are arranged in parallel and spaced front and back; the two ends of the horizontal support plate 21 are also respectively fixed with vertical plates 23 extending downward, and the vertical plates 23 are located on the outside of the vertical pulley groups, and horizontal pulleys 24 that are arranged in parallel and spaced up and down are arranged between the two vertical plates 23, and the two horizontal pulleys 24 pass through the middle interval of each set of vertical pulley groups, and the upper horizontal pulley is arranged close to the horizontal support plate 21, and the lower horizontal pulley is connected to the two vertical plates 23 by a quick release structure.

[0032] Specifically, one end of the central axis of the lower horizontal pulley is hingedly connected to one side vertical plate through a connecting seat, and the other end of the central axis of the lower horizontal pulley is plug-connected to the other side vertical plate through a connecting pin to form a quick-release structure.

[0033] The pulley mechanism 2 is designed as above, and a pulley-enclosed channel is formed between the two vertical pulley blocks and the two horizontal pulleys. The pulley-enclosed channel forms an inlet and outlet through the lower horizontal pulley and the quick-release structure. The traction rope or the optical cable / ground wire connected to it enters the pulley-enclosed channel through the inlet and outlet and passes through the pulley-enclosed channel.

[0034] The horizontal support plate 21 and the vertical plate 23 are provided with a connecting ring 25, and the connecting ring 25 is used to connect the steel wire rope.

[0035] As shown above, the device through which the optical cable or ground wire passes adopts a pulley mechanism 2 with all-round built-in pulleys, which reduces wear on the pulley and does not affect the laying of the optical cable or ground wire.

[0036] The function of the sub-conductor spacer 11 is to fix the pulley mechanism 2 to the adjacent two-phase conductors below through wire ropes. It adopts a device with a structure similar to the conductor spacer of the construction line, and a hanging ring 13 is installed on its side to facilitate the insertion and fixation of the wire rope.

[0037] In this embodiment, the sub-conductor spacer 11 is a four-split spacer, and the split spacer is provided with through holes 14 corresponding to the sub-conductors. At the same time, the frame of the split spacer is distributed with hanging rings 13, and the hanging rings 13 are used to connect the wire rope.

[0038] During actual construction, the steel wire rope is checked by force calculation, and the length selection should meet the following principles: the vertex of the triangle formed in the vertical plane meets the sag point of the optical cable at the binding point of the system when the optical cable is in the tension state, and a redundancy of 0.3m-0.5m is reserved to meet the situation of uneven tension of the optical cable.

[0039] The device for effectively suppressing wind deviation of the optical cable or ground wire in this embodiment is arranged near the top of the spanned object or on one side of the top or on both sides of the top, thereby achieving the effect of suppressing wind deviation.

[0040] The following takes the 500kV Huaxiang II line 019#-020# crossing the S325 National Highway as an example to explain in detail the application and effects of the present invention.

[0041] like Figure 5 As shown, the 500kV Huaxiang II line 019#-020# crosses the S325 National Highway. The construction task is to replace the right phase ground wire with an optical cable. The crossing section is 019#-020#, the length of the tension section is 2949m, and the crossing adopts the "tension-straight-straight-tension" crossing method. The span of the span 019#-020# is 453m, and the intersection angle between the 500kV Huaxiang II line and the S325 National Highway is 70°. The S325 National Highway has a surface width of 12m and two lanes of 12m in both directions (including emergency lanes).

[0042] According to the wind deviation calculation formula

[0043] Z=W 4(10) ×[x(1-x) / 2H+λ / W1]

[0044] in:

[0045] x - the distance between the crossing point and the nearest tower of the calculated line (m), which is 68m and 373m on the large and small sides of S325 respectively.

[0046] H-line conductor and ground wire (traction rope) tension (N), the optical cable in this scheme is 10000N;

[0047] l- Calculate the span of the line across the span (m), take 453m;

[0048] λ-Calculate the line conductor and optical cable as hanging mode (m). In this scheme, the optical cable is 0.3m;

[0049] W1-calculate the weight per unit length of the line optical cable (N / m). For this solution, W1=8.53N / m.

[0050] d-calculated line optical cable diameter (mm), in this scheme, d=16.6mm;

[0051] K-wind load type coefficient; when d≤17mm, K=1.2; when d>17mm, K=1.1;

[0052] W4(10)-The wind load per unit length of the ground wire at the maximum wind speed, calculated by the following formula (the wind speed is assumed to be 10 m / s): W4(10) = 0.0613 Kd.

[0053] Install the system at a suitable location on the left side of the road, such as Figure 6 As shown by line A in the middle, the system is set up 68 meters on the left side of the highway.

[0054] The windage comparison before and after using this system is shown in the following table:

[0055]

[0056] It can be seen from the above table that installing this system can significantly reduce wind deviation, which has a significant effect on reducing construction costs and risks.

[0057] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0058] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0059] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.

Claims

1. A device for effectively suppressing wind deflection of an optical cable or ground wire, characterized in that: It includes a fixing mechanism, a pulley mechanism and a steel wire rope, wherein: The fixing mechanism comprises sub-conductor spacer bars respectively arranged on the conductors on both sides of the tower, and the two sub-conductor spacer bars are connected by an interphase spacer bar; The pulley mechanism is installed on the traction rope or the optical cable / ground wire connected to it. One end of the traction rope is connected to the traction machine, and the other end of the traction rope is connected to the optical cable / ground wire. The traction rope drives the optical cable / ground wire to pass through the pulley mechanism. The pulley mechanism is connected to the sub-conductor spacer bars on both sides below it through steel wire ropes, forming a triangular structure in the vertical plane; The pulley mechanism comprises a horizontal support plate, and vertical pulley groups are respectively arranged at the left and right ends of the lower side of the horizontal support plate, and each set of vertical pulley groups consists of two vertical pulleys arranged in parallel and spaced front and back; vertical plates extending downward are also fixed at both ends of the horizontal support plate, and the vertical plates are located on the outside of the vertical pulley groups, and horizontal pulleys arranged in parallel and spaced up and down are arranged between the two vertical plates, and the two horizontal pulleys pass through the middle interval of each set of vertical pulley groups, and the upper horizontal pulley is arranged close to the horizontal support plate, and the lower horizontal pulley is connected to the two vertical plates through a quick-release structure; A pulley-enclosed channel is formed between the two vertical pulley blocks and the two horizontal pulleys. The pulley-enclosed channel forms an entrance and an exit through the lower horizontal pulley and the quick-release structure. The traction rope or the optical cable / ground wire connected to it enters the pulley-enclosed channel through the entrance and exit and passes through the pulley-enclosed channel. The horizontal support plate and / or the vertical plate are provided with a connecting ring, and the connecting ring is used to connect the steel wire rope; The sub-conductor spacer is a split-type spacer, which is provided with through holes corresponding to the sub-conductors. Meanwhile, the frame of the split-type spacer is provided with hanging rings for connecting steel wire ropes.

2. The device for effectively suppressing wind deviation of an optical cable or ground wire according to claim 1, characterized in that: The device for effectively suppressing wind deviation of the optical cable or ground wire is arranged near the top of the spanned object or on one side of the top or on both sides of the top.

3. The device for effectively suppressing wind deviation of an optical cable or ground wire according to claim 1, characterized in that: One end of the central axis of the lower horizontal pulley is hingedly connected to one side vertical plate through a connecting seat, and the other end of the central axis of the lower horizontal pulley is plug-connected to the other side vertical plate through a connecting pin to form a quick-release structure.

Images