A self-deicing system for power transmission lines in unmanned areas

Abstract

The invention discloses a self-deicing system for power transmission lines in unmanned areas, which belongs to the field of power transmission deicing. The self-deicing system for power transmission lines in unmanned areas can timely control the self-heating strip to be energized and heated by setting a double-effect deicing sleeve in snowy winter weather when an ice sensor detects that the power transmission line has been frozen. On the one hand, the ice layer condensed outside the power transmission line is locally melted and loosened by heat, and on the other hand, the self-heating strip is expanded by heat, and squeezes and pushes the loosened ice layer outward, so that it breaks up and gradually separates from the cable and falls off. Compared with the prior art, the time for ice to cover the cable is greatly reduced, and the effect of timely and rapid automatic deicing after freezing is achieved, which greatly reduces the influence of ice on the stability of power transportation of the power transmission line. In addition, the double-effect deicing sleeve can play a certain supporting role on the cable between the two tower poles, thereby effectively improving the stability of the cable and making it difficult to fall off the tower pole.

Description

Technical Field

[0001] The present invention relates to the field of power transmission deicing, and more particularly to a self-deicing system for power transmission lines in unmanned areas. Background Art

[0002] The transmission line is realized by using a transformer to step up the voltage of the electric energy generated by the generator, and then connecting it to the transmission line through control equipment such as circuit breakers. According to the structural form, the transmission line is divided into overhead transmission lines and cable lines. Overhead transmission lines are composed of line towers, conductors, insulators, line hardware, guy wires, tower foundations, grounding devices, etc., and are erected above the ground.

[0003] In the winter snowy season, elevated transmission lines will generally freeze due to low temperature, rain and snow, causing the overall gravity of the elevated lines to increase, which may cause part of the transmission lines to fall off the towers. In severe cases, it may even affect the power transportation of the entire transmission line. In crowded areas, the above situation is easy to detect when it occurs. However, in uninhabited areas, when the line collapses due to ice, it is difficult to determine the damaged location in time, which seriously affects the stability of power transportation. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a self-deicing system for power transmission lines in unmanned areas. Through the setting of a double-effect deicing sleeve, in snowy weather in winter, when the ice sensor detects that the transmission line has been frozen, the self-heating strip can be promptly controlled to be energized and heated. On the one hand, the ice layer condensed outside the transmission line is locally melted and loosened; on the other hand, the self-heating strip expands due to the heat, squeezes and pushes the loosened ice layer outward, causing it to break and gradually detach from the cable and fall off. Compared with the prior art, the time for ice to cover the cable is greatly reduced, and the effect of timely and rapid automatic deicing after freezing is achieved, which greatly reduces the impact of ice on the stability of power transportation of the transmission line. In addition, the double-effect deicing sleeve can play a certain supporting role for the cable between the two towers, thereby effectively improving the stability of the cable and making it difficult for it to fall off the tower.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A self-deicing system for power transmission lines in an unmanned area comprises cables installed on a plurality of towers, a main control panel installed on the towers, a temperature sensor, an ice sensor and a plurality of double-effect deicing sleeves respectively connected between two adjacent towers, wherein the double-effect deicing sleeves are arranged on the outside of the cables, and both left and right ends of the double-effect deicing sleeves are fixedly connected with conical mounting rings between the towers, the double-effect deicing sleeves comprise a plurality of evenly distributed limiting rings and a plurality of convex self-heating sleeves respectively fixedly connected between two adjacent limiting rings, a plurality of evenly distributed self-heating strips are fixedly inlaid on the convex self-heating sleeves, a mounting plate is fixedly connected to the upper end of the limiting ring, a solar cell panel is installed on the upper end of the mounting plate, the solar cell panel is electrically connected to the self-heating strip, and a signal switch for controlling the on and off of the self-heating strip is installed in the mounting plate, the temperature sensor and the ice sensor are respectively electrically connected to the adjacent solar panels, and the temperature sensor, the ice sensor and the signal switch are all connected to the main control panel signal.

[0009] Furthermore, the diameter of the end of the conical surface mounting ring connected to the tower pole is larger than the diameter of the other end, and the height difference between the lower ends of two adjacent limiting rings is no more than 5 mm.

[0010] Furthermore, the convex self-heating sleeve includes an inner fixing layer located in the inner layer and a pre-concave-convex layer wrapped outside the inner fixing layer, the two ends of the pre-concave-convex layer and the inner fixing layer are respectively fixedly connected to two adjacent limiting rings, the end of the self-heating strip is fixedly passed through the pre-concave-convex layer, and the end of the self-heating strip located in the pre-concave-convex layer and the inner fixing layer is fixedly connected to the inner fixing layer.

[0011] Furthermore, the pre-concave-convex layer is an elastic sealing structure, the inner fixed layer is a hard heat-insulating fixed structure, and the space between the pre-concave-convex layer and the inner fixed layer is saturated with air.

[0012] Furthermore, a plurality of groups of evenly distributed limiting rods are fixedly connected between the ends of the pre-concave-convex layer and the inner fixed layer that are close to each other, and the plurality of groups of limiting rods are respectively spaced apart from the plurality of self-heating strips.

[0013] Furthermore, the limiting rod is a hard shaped structure, and the distance between the pre-concave-convex layer and the inner shaped layer is just the length of the limiting rod.

[0014] Furthermore, the self-heating strip includes a heating wire whose one end is electrically connected to an adjacent solar cell panel and a heat pushing strip fixedly embedded in the outer end of the heating wire, the heat pushing strip is saturated with helium, and the heating wire is fixedly embedded in the pre-concave-convex layer.

[0015] Furthermore, the transverse span of the heating wire is consistent with the transverse length of the convex self-heating sleeve, and the heating wire is in a winding shape, and the angle between the two farthest bending points in the winding heating wire does not exceed 30°.

[0016] Furthermore, the transverse length of the heat push strip is not less than 2 / 3 of the transverse length of the convex self-heating sleeve, and the heat push strip is completely located between the pre-concave and convex layer and the inner fixing layer, and the connection point between the heat push strip and the inner fixing layer is located at the end opposite to the heat push strip and the heating wire.

[0017] Furthermore, the heating wire is sealed with a high thermal conductivity insulating layer, and the portion of the heating wire connected to the heat pushing strip is embedded in the heat pushing strip, and the portion of the heating wire located in the heat pushing strip is not wrapped with the insulating layer.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] (1) This scheme uses a double-effect deicing sleeve. When the ice sensor detects that the transmission line has frozen in snowy weather in winter, the self-heating strip can be energized and heated in time. On the one hand, the ice layer condensed outside the transmission line is partially melted and loosened. On the other hand, the self-heating strip expands due to heat, squeezing and pushing the loosened ice layer outward, causing it to break and gradually detach from the cable and fall off. Compared with the existing technology, the time for the cable to be covered with ice is greatly reduced, and the effect of timely and rapid automatic deicing is achieved after freezing, which greatly reduces the impact of ice on the stability of power transmission of the transmission line. In addition, the double-effect deicing sleeve can play a certain supporting role for the cable between the two towers, thereby effectively improving the stability of the cable and making it less likely to fall off the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the front side of the present invention;

[0022] Figure 2 It is the main system block diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the front side when the cable outer jacket of the present invention is provided with a double-effect deicing sleeve;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of a cable outer jacket provided with a double-effect deicing jacket according to the present invention;

[0025] Figure 5 It is a structural schematic diagram of the cross-section of the double-effect deicing boot of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the cross section of the outward convex self-heating sleeve of the present invention;

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the self-heating strip of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the cross section of the double-effect deicing boot of the present invention during deicing;

[0029] Fig. 9 It is a structural schematic diagram of the prior art.

[0030] Description of the numbers in the figure:

[0031] 1 cable, 2 limiting ring, 3 mounting plate, 31 solar panel, 4 self-heating strip, 41 heat push strip, 42 heating wire, 5 conical mounting ring, 6 convex self-heating sleeve, 61 pre-concave-convex layer, 62 inner fixing layer, 7 limiting rod. DETAILED DESCRIPTION

[0032] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] See also Figure 1-2In the figure, a represents a tower pole, and b represents a double-effect deicing sleeve. A self-deicing system for power transmission lines in an unmanned area includes a cable 1 installed on multiple tower poles, a main control board installed on the tower poles, a temperature sensor, an ice sensor, and multiple double-effect deicing sleeves respectively connected between two adjacent tower poles. The double-effect deicing sleeve is arranged on the outside of the cable 1, and the left and right ends of the double-effect deicing sleeve are fixedly connected to the tower poles with a conical mounting ring 5. The diameter of the end of the conical mounting ring 5 connected to the tower pole is larger than the diameter of the other end, so that the area of ​​connection between the conical mounting ring 5 and the tower pole is relatively large, so that the connection stability between the double-effect deicing sleeve and the tower pole is higher, the height difference between the lower ends of two adjacent limit rings 2 is not more than 5mm, so that the overall straightness of the double-effect deicing sleeve is relatively high, and the maximum downward deformation amplitude of the middle part is not easy to be too large, so that the support effect of the cable 1 is better.

[0037] See also Figure 3-4 The double-effect de-icing sleeve includes a plurality of evenly distributed limit rings 2 and a plurality of convex self-heating sleeves 6 respectively fixedly connected between two adjacent limit rings 2, a plurality of evenly distributed self-heating strips 4 are fixedly inlaid on the convex self-heating sleeves 6, a mounting plate 3 is fixedly connected to the upper end of the limit ring 2, a solar cell panel 31 is installed on the upper end of the mounting plate 3, the solar cell panel 31 is electrically connected to the self-heating strip 4, and a signal switch for controlling the power on and off of the self-heating strip 4 is installed in the mounting plate 3, the temperature sensor and the ice sensor are respectively electrically connected to the adjacent solar panel 31, and the temperature sensor, the ice sensor and the signal switch are all connected to the main control board signal.

[0038] In addition, in winter weather after snow, when the temperature sensor detects a low temperature, it can feed back a signal to the main control board. The main control board controls the signal switch to turn on the heating wire 42 to energize the heating wire 42, thereby making the surface temperature of the cable 1 relatively high relative to the ambient temperature, making the surface of the cable 1 less likely to freeze, greatly reducing the amount of ice, and reducing the impact of ice on the stability of the transmission line in low temperature weather.

[0039] When the ice sensor detects that the surface of the cable 1 is frozen, the signal can be fed back to the main control board, so that the main control board controls the heating wire 42 to be energized to loosen the ice layer, and then cooperates with the expansion and outward squeezing of the self-heating strip 4 to achieve the effect of self-deicing after ice formation.

[0040] See also Figure 5-6 The outward convex self-heating sleeve 6 includes an inner fixing layer 62 located in the inner layer and a pre-concave-convex layer 61 wrapped outside the inner fixing layer 62. The two ends of the pre-concave-convex layer 61 and the inner fixing layer 62 are respectively fixedly connected to two adjacent limiting rings 2. The end of the self-heating strip 4 is fixedly passed through the pre-concave-convex layer 61, and the end of the self-heating strip 4 located in the pre-concave-convex layer 61 and the inner fixing layer 62 is fixedly connected to the inner fixing layer 62.

[0041] The pre-concave-convex layer 61 is an elastic sealing structure, the inner fixed layer 62 is a hard insulating fixed structure, and the space between the pre-concave-convex layer 61 and the inner fixed layer 62 is saturated with air, so that the overall appearance of the convex self-heating sleeve 6 presents a relatively smooth and full cylindrical structure, which makes it difficult for ice and snow to adhere to its surface, effectively reducing the amount of ice on the cable 1 after snow.

[0042] A plurality of evenly distributed limiting rods 7 are fixedly connected between the ends of the pre-concave-convex layer 61 and the inner fixing layer 62, and the plurality of limiting rods 7 are spaced apart from each other by the plurality of self-heating strips 4. The limiting rods 7 are hard and fixed structures, and the distance between the pre-concave-convex layer 61 and the inner fixing layer 62 is just the length of the limiting rods 7. Figure 8 The dotted line in the figure represents the initial state of the pre-concave-convex layer 61 when the self-heating strip 4 is not energized. The limiting rod 7 is used to limit the distance between the pre-concave-convex layer 61 and the pre-concave-convex layer 61. When the self-heating strip 4 is energized and heated, the self-heating strip 4 expands due to the heat, so that the corresponding pre-concave-convex layer 61 tends to bulge outward with the connection between the two as the fixed point, until the ice layer breaks and is pushed away, and the pre-concave-convex layer 61 corresponding to the limiting rod 7 is constrained with the limiting rod 7 as the vertex, and it is difficult to bulge outward together, so that the cross-section of the convex self-heating sleeve 6 alternately presents a convex-concave-convex state. When the self-heating strip 4 bulges outward and pushes the ice layer outward, it is difficult for the limiting rod 7 to expand accordingly. Due to the hardness of the ice layer, the pre-concave-convex layer 61 is gradually separated from the ice layer, which facilitates the ice layer to fall off from the surface of the cable 1, making the self-deicing efficiency better and the effect better.

[0043] See also Figure 7 The self-heating strip 4 includes a heating wire 42 one end of which is electrically connected to the adjacent solar cell panel 31 and a heat pushing strip 41 fixedly embedded in the outer end of the heating wire 42. The heat pushing strip 41 is saturated with helium. The heating wire 42 is fixedly embedded in the pre-concave-convex layer 61. Compared with other gases, helium is an inert gas and has a higher thermal conductivity. When the heating wire 42 is energized to generate heat, the helium is heated faster, causing the heat pushing strip 41 to expand rapidly, thereby achieving the effect of bulging outward at the corresponding part of the pre-concave-convex layer 61 to push the ice layer.

[0044] The lateral span of the heating wire 42 is consistent with the lateral length of the convex self-heating sleeve 6, and the heating wire 42 is in a winding shape, so that the heating wire 42 is more widely distributed on the surface of the convex self-heating sleeve 6. When heated, the heat push strip 41 expands and pushes the ice layer outward at a larger pushing point, so that the deicing effect is better. The angle between the two bending points farthest from each other in the zigzag heating wire 42 does not exceed 30 degrees, so that the plurality of heating wires 42 are not easy to interweave and interlace with each other when they are bent, so that the outer surface of the convex self-heating sleeve 6 is not easy to be pre-convex and concave due to the protrusion of the heating wire 42 The surface of the pre-concave-convex layer 61 forms too many staggered protrusions, which reduces the deposition of snow and water during snow melting at the staggered locations, thereby reducing the difficulty of removing the ice layer. The lateral length of the heat pushing strip 41 is not less than 2 / 3 of the lateral length of the convex self-heating sleeve 6, so that when heated after power is turned on, the expansion range of the heat pushing strip 41 is not easy to be too small, so that the pushing effect on the ice layer is better, and the heat pushing strip 41 is completely located between the pre-concave-convex layer 61 and the inner fixing layer 62, and the connection point between the heat pushing strip 41 and the inner fixing layer 62 is located at the end of the heat pushing strip 41 opposite to the heating wire 42.

[0045] The heating wire 42 is sealed with a high thermal conductivity insulating layer, and the portion of the heating wire 42 connected to the heat pushing strip 41 is embedded in the heat pushing strip 41, and the portion of the heating wire 42 located in the heat pushing strip 41 is not wrapped with the insulating layer.

[0046] Through the setting of double-effect de-icing boots, such as Figure 8 In winter, when it snows, when the ice sensor detects that the transmission line has frozen, the self-heating strip 4 can be controlled to be energized and heated in time. On the one hand, the ice layer outside the transmission line is partially melted and loosened. On the other hand, the self-heating strip 4 expands due to the heat, squeezes and pushes the loosened ice layer outward, causing it to break and gradually separate from the cable 1 and fall off. Compared with Fig. 9 The existing technology in the invention can greatly reduce the time when the cable 1 is covered with ice, realize the effect of timely and rapid automatic de-icing after ice formation, and greatly reduce the impact of ice formation on the stability of power transportation of the transmission line. In addition, the double-effect de-icing sleeve can play a certain supporting role for the cable 1 between the two towers, thereby effectively improving the stability of the cable 1 and making it difficult for it to fall off the tower.

[0047] In addition, in order to ensure that the temperature of the self-heating strip 4 does not rise too high after power is turned on and affect the cable 1, the C language is used to program in the main control board to control the alternating power supply of multiple self-heating strips 4 on multiple convex self-heating sleeves 6, that is, among two adjacent self-heating strips 4, one is powered on and the other is powered off, so that the power-on time of the self-heating strip 4 is limited, and it is not easy to cause overheating of the surface of the cable 1 due to long-term power supply.

[0048] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A self-deicing system for power transmission lines in an unmanned area, comprising a cable (1) installed on a plurality of towers, a main control panel installed on the towers, a temperature sensor, an ice sensor, and a plurality of double-effect deicing sleeves respectively connected between two adjacent towers, Features: The double-effect deicing sleeve is arranged on the outside of the cable (1), and the left and right ends of the double-effect deicing sleeve are fixedly connected to the tower with a conical mounting ring (5), the double-effect deicing sleeve comprises a plurality of evenly distributed limit rings (2) and a plurality of convex self-heating sleeves (6) respectively fixedly connected between two adjacent limit rings (2), the convex self-heating sleeves (6) are fixedly inlaid with a plurality of evenly distributed self-heating strips (4), the upper end of the limit ring (2) is fixedly connected to a mounting plate (3), the upper end of the mounting plate (3) is installed with a solar panel (31), the solar panel (31) is electrically connected to the self-heating strip (4), and a signal switch for controlling the power on and off of the self-heating strip (4) is installed in the mounting plate (3), the temperature sensor and the ice sensor are respectively electrically connected to the adjacent solar panels (31), and the temperature sensor, the ice sensor and the signal switch are all connected to the main control board signal.

2. The self-deicing system for power transmission lines in unmanned areas according to claim 1, Features: The diameter of the end of the conical surface mounting ring (5) connected to the tower pole is larger than the diameter of the other end, and the height difference between the lower ends of two adjacent limiting rings (2) is no more than 5 mm.

3. The self-deicing system for power transmission lines in unmanned areas according to claim 2, Features: The outwardly convex self-heating sleeve (6) comprises an inner fixing layer (62) located in the inner layer and a pre-concave-convex layer (61) wrapped outside the inner fixing layer (62), the two ends of the pre-concave-convex layer (61) and the inner fixing layer (62) are respectively fixedly connected to two adjacent limiting rings (2), the end of the self-heating strip (4) is fixedly passed through the pre-concave-convex layer (61), and the end of the self-heating strip (4) located inside the pre-concave-convex layer (61) and the inner fixing layer (62) is fixedly connected to the inner fixing layer (62).

4. The self-deicing system for power transmission lines in unmanned areas according to claim 3, Features: The pre-concave-convex layer (61) is an elastic sealing structure, the inner fixing layer (62) is a hard heat-insulating fixed structure, and the space between the pre-concave-convex layer (61) and the inner fixing layer (62) is saturated with air.

5. The self-deicing system for power transmission lines in unmanned areas according to claim 4, Features: A plurality of groups of evenly distributed limiting rods (7) are fixedly connected between the mutually adjacent ends of the pre-concave-convex layer (61) and the inner fixing layer (62), and the plurality of groups of limiting rods (7) are respectively spaced apart from the plurality of self-heating strips (4).

6. The self-deicing system for power transmission lines in unmanned areas according to claim 5, Features: The limiting rod (7) is a hard shaped structure, and the distance between the pre-concave-convex layer (61) and the inner shaped layer (62) is exactly the length of the limiting rod (7).

7. The self-deicing system for power transmission lines in unmanned areas according to claim 3, Features: The self-heating strip (4) comprises a heating wire (42) one end of which is electrically connected to an adjacent solar cell panel (31) and a heat pushing strip (41) fixedly embedded in the outer end of the heating wire (42), the heat pushing strip (41) being saturated with helium, and the heating wire (42) being fixedly embedded in the pre-concave-convex layer (61).

8. The self-deicing system for power transmission lines in unmanned areas according to claim 7, Features: The transverse span of the heating wire (42) is consistent with the transverse length of the convex self-heating sleeve (6), and the heating wire (42) is in a winding shape, and the angle between the two most distant bending points in the winding heating wire (42) does not exceed 30°.

9. The self-deicing system for power transmission lines in unmanned areas according to claim 8, Features: The transverse length of the heat push strip (41) is not less than 2 / 3 of the transverse length of the convex self-heating sleeve (6), and the heat push strip (41) is completely located between the pre-concave-convex layer (61) and the inner fixing layer (62), and the connection point between the heat push strip (41) and the inner fixing layer (62) is located at the end of the heat push strip (41) opposite to the heating wire (42).

10. The self-deicing system for power transmission lines in unmanned areas according to claim 9, Features: The heating wire (42) is sealed with a high thermal conductivity insulating layer, and the portion of the heating wire (42) connected to the heat push strip (41) is embedded in the heat push strip (41), and the portion of the heating wire (42) located in the heat push strip (41) is not wrapped with the insulating layer.

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