An ice-removing device for distribution network overhead line based on electrothermal ice-melting technology

Abstract

The application discloses a deicing device for distribution network overhead line based on electric heating ice melting technology, which comprises a distribution network overhead line ice melting device, and is characterized in that the device further comprises an auxiliary conductor and a mechanical deicing mechanism; the auxiliary conductor is arranged in parallel to the distribution network overhead line, the mechanical deicing mechanism is movably arranged on the distribution network overhead line, and the auxiliary conductor and the mechanical deicing mechanism are electrically connected with the distribution network overhead line. The application has the advantages that the ice layer close to the distribution network overhead line and the auxiliary conductor can be melted by maintaining relatively low power and relatively small current, power consumption is reduced, deicing efficiency and effect are improved, and the distribution network overhead line is prevented from bouncing.

Description

Technical Field

[0001] This invention relates to the field of power transmission line de-icing technology, specifically to a de-icing device for overhead distribution lines based on electrothermal de-icing technology. Background Technology

[0002] High-voltage overhead distribution lines are a crucial component of the power system. They not only bear the heavy responsibility of power transmission, but their safe and reliable operation directly impacts the stable development of the national economy and the provision of essential electricity for people's lives. In winter, these overhead lines are prone to icing and ice accumulation, which can lead to severe damage such as cable breakage and tower collapse, causing widespread power outages. Therefore, icing poses a significant threat to transmission cables, towers, and other facilities, affecting the reliability and service level of the overhead distribution network. This impact is particularly severe in mountainous areas where distribution lines are frequently affected by snow and ice disasters.

[0003] Currently, de-icing methods for overhead distribution lines can be broadly categorized into three types both domestically and internationally: thermal de-icing, natural de-icing, and mechanical de-icing. Thermal de-icing involves adding an extra heat source or current to the overhead distribution line using a de-icing device or system to heat the conductors, thus preventing or melting ice. Common thermal de-icing methods include overcurrent de-icing, short-circuit de-icing, DC de-icing, and high-frequency high-voltage excitation de-icing. Thermal de-icing requires significant heat to melt the surface ice, resulting in high power consumption. Furthermore, rapid melting can cause cables to bounce and break, while slow melting can delay de-icing and lead to cable breakage due to excessive icing. Natural de-icing, on the other hand, utilizes the combined effects of the ice's own weight, temperature changes, wind force, and external radiation to allow the ice to detach naturally. Natural de-icing requires less investment and no additional energy, but it suffers from low efficiency, incomplete de-icing, and significant ice residue. Mechanical de-icing methods are diverse; those used for overhead power distribution lines mainly include robotic de-icing, pulley de-icing, and vibration de-icing. Mechanical de-icing methods are more challenging, specifically because the ice is difficult to crush or break, and some residue remains that is difficult to clean.

[0004] Therefore, there is an urgent need for a de-icing device that can solve the problems mentioned above, such as rapid and bouncing de-icing of overhead power distribution lines, high power consumption, low de-icing efficiency, and large amounts of de-icing residue. Summary of the Invention

[0005] The technical problem to be solved by this invention is how to prevent the overhead power distribution line from bouncing, reduce power consumption, improve de-icing efficiency, and ensure de-icing effect.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A de-icing device for overhead distribution lines based on electrothermal de-icing technology includes an overhead distribution line de-icing device, which is installed on transmission towers at both ends of the overhead distribution line; characterized in that it also includes auxiliary conductors and a mechanical de-icing mechanism.

[0008] The auxiliary conductor is set parallel to the overhead distribution line, and the mechanical de-icing mechanism is movably set on the overhead distribution line. Both the auxiliary conductor and the mechanical de-icing mechanism are electrically connected to the overhead distribution line.

[0009] This invention first uses a power transmission line de-icing device to lightly melt the ice on the surface of the overhead distribution line and auxiliary conductors, melting the ice layer close to the surface. Then, a mechanical de-icing mechanism is used to quickly break and remove ice from the surface of the auxiliary conductors and overhead distribution line. Since it only needs to maintain a relatively low power and a relatively small current to melt the ice layer close to the overhead distribution line and auxiliary conductor, power consumption is reduced. When the ice layer in the inner ring melts, the mechanical de-icing mechanism can greatly reduce the difficulty of breaking, crushing, and removing ice, whether by crushing, hitting, or squeezing, thus improving the de-icing efficiency and ensuring the de-icing effect. At the same time, it also prevents the overhead distribution line from bouncing.

[0010] In addition, the auxiliary conductor cuts the ice cap on the top of the overhead distribution line in half, thereby greatly reducing the adhesion of the ice layer on the surface of the overhead distribution line 1 and causing it to lose its support and slide off. It can achieve a certain degree of ice melting, ice cutting and de-icing effect with low energy consumption.

[0011] Preferably, multiple clamps for limiting the movement range of auxiliary conductors are evenly clamped on the overhead power distribution line, and the top of each clamp has a limiting groove that allows the auxiliary conductor to pass through.

[0012] Preferably, the line clamp includes a ring structure and a limiting plate; the ring structure is wrapped around the overhead power distribution line and the limiting plate is provided on the top, and the limiting groove is opened on the limiting plate.

[0013] Preferably, the auxiliary conductor includes an arc-shaped support plate and a vertical thin plate; the arc-shaped support plate is provided with a vertical thin plate on its top; the arc-shaped support plate is disposed between the overhead distribution line and the line clamp and is attached to the top of the overhead distribution line, and the vertical thin plate is disposed in a limiting groove.

[0014] By using arc-shaped support plates and vertical thin plates to cut the ice cap on the top of the overhead power distribution line in half, the adhesion of the ice layer on the surface of the overhead power distribution line is greatly reduced and it loses its support, causing it to slip off. This method can achieve a certain degree of ice melting, ice cutting and de-icing effects with low energy consumption.

[0015] Preferably, the ratio of the cross-section of the auxiliary conductor to the cross-section of the overhead power distribution line is 0.02-0.1.

[0016] Preferably, the auxiliary conductor adopts a threaded rod structure, and the mechanical de-icing mechanism includes a hollow drill bit, a de-icing slider, and a drive assembly. The hollow drill bit has a through internal threaded hole, which is threadedly connected to the auxiliary conductor. A driven wheel is provided on the outer wall of the hollow drill bit. The de-icing slider is sleeved on the overhead power distribution line and is connected to the hollow drill bit and can rotate relative to it. The fixed end of the drive assembly is fixed on the de-icing slider, and the output end of the drive assembly meshes with the driven wheel.

[0017] By using a hollow drill bit and a de-icing slider to break and remove ice from the melting point of the inner ring of the ice layer, the difficulty of breaking, crushing, and removing ice by mechanical de-icing mechanisms is greatly reduced, making the ice breaking and de-icing operation relatively easy. This not only avoids the bouncing phenomenon caused by rapid ice melting, but also has the advantages of relatively low power consumption and high de-icing efficiency.

[0018] Preferably, the drive assembly includes a drive motor and a drive wheel. The drive motor is fixed on the de-icing slider, and the output end of the drive motor is connected to a drive wheel that meshes with the driven wheel.

[0019] Preferably, the forward end of the de-icing slider is conical.

[0020] Preferably, both the hollow drill bit and the de-icing slider are equipped with ice-cutting blades at their forward ends; this increases the pressure at the ice-breaking point, reduces the pulling force required for ice breaking, and improves the de-icing efficiency.

[0021] Preferably, a power battery pack is installed on the de-icing slider, and an electric cleaning brush ring that wraps the auxiliary wire and the overhead power line is respectively installed on the hollow drill bit and the end of the de-icing slider away from the forward end. The electric cleaning brush ring is connected to the power battery pack via electrical wires.

[0022] The electric cleaning brush ring removes residual moisture from the surface of overhead power lines and auxiliary conductors during light de-icing, preventing secondary icing and reducing the de-icing effect.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention first uses a power transmission line de-icing device to lightly de-ice the surface of the distribution network overhead lines and auxiliary conductors, melting the ice layer close to their surfaces. Then, a mechanical de-icing mechanism is used to quickly break and remove ice from the surface of the auxiliary conductors and distribution network overhead lines. Since it only needs to maintain a relatively low power and a relatively small current to keep the ice layer close to the distribution network overhead lines and auxiliary conductors melting, power consumption is reduced. When the ice layer in the inner ring at this point melts, the mechanical de-icing mechanism can greatly reduce the difficulty of breaking, crushing, and removing ice, whether by crushing, hitting, or squeezing, thus improving de-icing efficiency and ensuring de-icing effect. It also prevents the distribution network overhead lines from bouncing.

[0025] In addition, the auxiliary conductor cuts the ice cap on the top of the overhead distribution line in half, thereby greatly reducing the adhesion of the ice layer on the surface of the overhead distribution line 1 and causing it to lose its support and slide off. It can achieve a certain degree of ice melting, ice cutting and de-icing effect with low energy consumption.

[0026] 2. By using arc-shaped support plates and vertical thin plates to cut the ice cap on the top of the overhead distribution line in half, the adhesion of the ice layer on the surface of the overhead distribution line is greatly reduced and it loses its support and slides off. It can achieve a certain degree of ice melting, ice cutting and de-icing effect with low energy consumption.

[0027] 3. By using a hollow drill bit and a de-icing slider to break and remove ice from the inner ring of the ice layer, the difficulty of breaking, crushing, and removing ice by the mechanical de-icing mechanism is greatly reduced, making the ice breaking and de-icing operation relatively easy. This not only avoids the bouncing phenomenon caused by rapid ice melting, but also has the advantages of relatively low power consumption and high de-icing efficiency.

[0028] 4. By designing the ice-cutting blades, the pressure at the ice-breaking point is increased, reducing the pulling force required for ice breaking and improving de-icing efficiency.

[0029] 5. Use an electric cleaning brush ring to remove residual moisture from the surface of overhead power lines and auxiliary conductors during light de-icing, to prevent secondary icing and reduce the de-icing effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0031] Figure 2 This is a partial structural diagram of Embodiment 1 of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of a single-line card according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the line card in Embodiment 2 of the present invention;

[0034] Figure 5 This is a partial structural diagram of Embodiment 3 of the present invention;

[0035] Figure 6 This is a schematic diagram of the auxiliary conductor in Embodiment 3 of the present invention;

[0036] Figure 7 This is a schematic diagram of the hollow drill bit according to Embodiment 4 of the present invention;

[0037] Figure 8 This is a schematic diagram of the de-icing slider in Embodiment 4 of the present invention;

[0038] Figure 9 This is a partial structural schematic diagram of the de-icing slider in Embodiment 4 of the present invention. Detailed Implementation

[0039] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0042] Example 1

[0043] See Figures 1 to 3 This embodiment discloses a de-icing device for overhead distribution lines based on electrothermal de-icing technology, including an overhead distribution line de-icing device (not shown in the figure), which is installed on the transmission towers at both ends of the overhead distribution line 1; the feature is that it also includes an auxiliary conductor 2 and a mechanical de-icing mechanism 3, both of which are electrically connected to the overhead distribution line 1; in this embodiment, the overhead distribution line de-icing device can be directly purchased on the market.

[0044] The auxiliary conductor 2 is set parallel to the overhead distribution line 1 and is set at the top of the overhead distribution line 1. Multiple wire clips 4 are evenly connected to the overhead distribution line 1 to limit the range of movement of the auxiliary conductor 2. The top of the wire clip 4 is provided with a limiting groove 401 that allows the auxiliary conductor 2 to pass through. The mechanical de-icing mechanism 3 is movably set on the overhead distribution line 1. Specifically, the transmission line de-icing device is first used to lightly melt the ice on the surface of the overhead distribution line 1 and the auxiliary conductor 2, melting the ice layer close to the surface to facilitate subsequent mechanical de-icing operations. Then, the mechanical de-icing mechanism 3 is used to quickly break and remove ice from the surface of the auxiliary conductor 2 and the overhead distribution line 1. The de-icing method is as follows: the mechanical de-icing mechanism 3 uses an existing transmission line de-icing robot for de-icing. Since it only needs to maintain a relatively low power and a relatively small current to melt the ice layer close to the overhead distribution line 1 and the auxiliary conductor 2, while melting the ice layer in the inner ring, the mechanical de-icing mechanism 3 can greatly reduce the difficulty of breaking, crushing, and removing ice, improve de-icing efficiency and ensure de-icing effect, and also prevent the overhead distribution line from bouncing. In this embodiment, the line clip 4 is a disposable consumable. When the ice on the surface of the overhead distribution line 1 melts, the mechanical de-icing mechanism 3 pushes the line clip 4 and the ice block apart and they fall off as it moves.

[0045] In addition, when the icing condition on the surface of the overhead distribution line 1 is mostly ice cap, that is, when the ice layer on the surface of the overhead distribution line 1 is mainly concentrated in the top semi-circular ice layer, the auxiliary conductor 2 cuts the ice cap at the top of the overhead distribution line 1 into two halves, thereby greatly reducing the adhesion of the ice layer on the surface of the overhead distribution line 1 and causing it to lose its support and slide off. It has the effect of melting, cutting and de-icing to a certain extent with low energy consumption.

[0046] Furthermore, the line clamp 4 includes a ring structure 41 and a limiting plate 42; the ring structure 41 wraps around the overhead distribution line 1 and the limiting plate 42 is provided on top, with the limiting groove formed on the limiting plate 42. The function of the line clamp 4 is to prevent the auxiliary conductor 2 from easily detaching, and to keep it inside the line clamp 4 and beside the overhead distribution line 1.

[0047] Example 2

[0048] Based on Example 1, see [link / reference] Figure 4The ring structure 41 adopts an aluminum ring plate structure 411, and the limiting plate 42 adopts an aluminum rectangular plate structure 421. During the operation of the transmission line de-icing device, the aluminum ring plate structure 411 and the aluminum rectangular plate structure 421 can melt the thin layer of ice that is close to the surface due to their high thermal conductivity. When the ice layer on the surface of the distribution network overhead line 1 is a semi-circular ice layer at the top, the auxiliary conductor 2 cuts a semi-circular ice cap in half. The aluminum ring plate structure 411 and the aluminum rectangular plate structure 421 melt the cut ice cap into segments. At the same time, there is also slight de-icing on the surface of the distribution network overhead line 1, which greatly reduces the adhesion of the ice layer on the surface of the distribution network overhead line 1 and causes it to slip. It has the effect of de-icing, ice cutting and de-icing to a certain extent with low energy consumption.

[0049] Example 3

[0050] Based on Example 1 or Example 2, see [link / reference] Figure 5 and Figure 6 The auxiliary conductor 2 includes an arc-shaped support plate 21 and a vertical thin plate 22; the arc-shaped support plate 21 is provided with a vertical thin plate 22 on its top; the arc-shaped support plate 21 is provided between the overhead distribution line 1 and the line clamp 4 and is attached to the top of the overhead distribution line 1, and the vertical thin plate 22 is vertically provided in the limiting groove 401.

[0051] Specifically, the arc-shaped support plate 21 and the vertical thin plate 22 cut the ice cap 4 on the top of the overhead power distribution line 1 into two halves, thereby greatly reducing the adhesion of the ice layer on the surface of the overhead power distribution line 1 and causing it to lose its support and slide off. This method can achieve a certain degree of ice melting and ice removal with low energy consumption. Compared with common thermal de-icing methods, including overcurrent de-icing, short-circuit de-icing, and DC de-icing, which require melting the ice layer on the top surface of the overhead power distribution line 1 to make it slide off, this method significantly reduces the amount of ice to be melted, thereby greatly saving energy consumption.

[0052] Example 4

[0053] Based on Example 1 or Example 2, see [link / reference] Figure 1 as well as Figures 7 to 9 The auxiliary conductor 2 adopts a threaded rod structure. In this embodiment, the ratio of the cross-section of the auxiliary conductor 2 to the cross-section of the overhead power distribution line 1 is 0.02-0.1.

[0054] The mechanical de-icing mechanism 3 includes a hollow drill bit 31, a de-icing slider 32, and a drive assembly 33. The hollow drill bit 31 has a through internal thread hole, which is threadedly connected to the auxiliary wire 2. A driven wheel 311 is provided on the outer wall of the hollow drill bit 31. The de-icing slider 32 is sleeved on the overhead power distribution line 1 and is connected to the outer wall of the hollow drill bit 31 and can rotate relative to it. The drive assembly 33 includes a drive motor 331 and a drive wheel 332. The drive motor 331 is fixed on the de-icing slider 32, and the output end of the drive motor 331 is connected to the drive wheel 332, which meshes with the driven wheel 311. Specifically, the drive motor 331 drives the drive wheel 332 to rotate, which in turn drives the driven wheel 311 to rotate and move the hollow drill bit 31 on the auxiliary conductor 2. This, in turn, causes the de-icing slider 32, which is rotatably connected to the outer wall of the hollow drill bit 31, to slide on the overhead power line 1. This allows the hollow drill bit 31 and the de-icing slider 32 to break and remove ice from the melting point of the inner ring of the ice layer, greatly reducing the difficulty of breaking, crushing, and removing ice from the mechanical de-icing mechanism 3, and making the ice-breaking and de-icing operation relatively easy. This not only avoids the bouncing phenomenon caused by rapid ice melting, but also has the advantages of relatively low power consumption and high de-icing efficiency. The energy saving is specifically reflected in the fact that there is no need to carry out high-power, high-current thermal de-icing methods that require a large amount of heat to melt the ice. It is only necessary to maintain a relatively low power and a relatively small current to keep the ice layer close to the distribution network overhead line 1 and auxiliary conductor 2 melting, while the ice layer in the inner ring at that location melts, which can significantly reduce the difficulty of ice breaking, crushing, and de-icing of the mechanical de-icing mechanism 3.

[0055] Furthermore, both the de-icing slider 32 and the forward end of the hollow drill bit 31 are conical, allowing them to first insert into the melted ice layer in the inner ring, thus enabling relatively easy ice breaking and de-icing operations. The forward ends of both the hollow drill bit 31 and the de-icing slider 32 are equipped with multiple ice-cutting blades 5, increasing the pressure at the ice-breaking point, reducing the pulling force required for ice breaking, and improving de-icing efficiency.

[0056] Furthermore, the top of the de-icing slider 32 is fixedly equipped with a housing that encloses the tail of the hollow drill bit 31 and the drive motor 331, which is used to protect the internal components of the mechanical de-icing mechanism 3 and ensure its stable operation.

[0057] Furthermore, a power battery pack 34 is installed on the de-icing slider 32, and an electric cleaning brush ring 35 that wraps around the auxiliary conductor 2 and the overhead power distribution line 1 is respectively installed on the hollow drill bit 31 and the end of the de-icing slider 32 away from the forward end. The electric cleaning brush ring 35 is electrically connected to the power battery pack 34. The electric cleaning brush ring 35 cleans the residual moisture on the surface of the overhead power distribution line 1 and the auxiliary conductor 2 during light de-icing, avoiding secondary icing and reducing the de-icing effect.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A de-icing device for overhead distribution lines based on electrothermal de-icing technology, comprising an overhead distribution line de-icing device, wherein the overhead distribution line de-icing device is installed on transmission towers at both ends of the overhead distribution line; characterized in that: It also includes auxiliary guide wires and mechanical de-icing mechanisms; The auxiliary conductor is set parallel to the overhead distribution line, and the mechanical de-icing mechanism is movably set on the overhead distribution line. Both the auxiliary conductor and the mechanical de-icing mechanism are electrically connected to the overhead distribution line. Multiple clamps are evenly attached to the overhead power distribution line to restrict the movement range of the auxiliary conductors. The top of the clamps has a limiting groove that allows the auxiliary conductors to pass through. The auxiliary conductor includes an arc-shaped support plate and a vertical thin plate; the arc-shaped support plate is provided with a vertical thin plate at the top; the arc-shaped support plate is placed between the overhead distribution line and the line clamp and is attached to the top of the overhead distribution line, and the vertical thin plate is placed in the limiting groove; The auxiliary conductor adopts a threaded rod structure. The mechanical de-icing mechanism includes a hollow drill bit, a de-icing slider, and a drive assembly. The hollow drill bit has a through internal thread hole, which is threadedly connected to the auxiliary conductor. A driven wheel is provided on the outer wall of the hollow drill bit. The de-icing slider is sleeved on the overhead power distribution line and is connected to the hollow drill bit, which can rotate relative to it. The fixed end of the drive assembly is fixed on the de-icing slider, and the output end of the drive assembly meshes with the driven wheel.

2. The de-icing device for overhead power distribution lines based on electrothermal de-icing technology according to claim 1, characterized in that: The line clamp includes a ring structure and a limiting plate; the ring structure is wrapped around the overhead power distribution line and the limiting plate is set on the top, and the limiting groove is opened on the limiting plate.

3. The de-icing device for overhead power distribution lines based on electrothermal de-icing technology according to claim 1, characterized in that: The ratio of the cross-section of the auxiliary conductor to the cross-section of the overhead distribution line is 0.02-0.

1.

4. The de-icing device for overhead power distribution lines based on electrothermal de-icing technology according to claim 1, characterized in that: The drive assembly includes a drive motor and a drive wheel. The drive motor is fixed on the de-icing slider, and the output end of the drive motor is connected to a drive wheel that meshes with the driven wheel.

5. The de-icing device for overhead power distribution lines based on electrothermal de-icing technology according to claim 1, characterized in that: The forward end of the de-icing slider is cone-shaped.

6. The de-icing device for overhead power distribution lines based on electrothermal de-icing technology according to claim 1, characterized in that: Both the hollow drill bit and the de-icing slider are equipped with ice-cutting blades at their forward ends.

7. The de-icing device for overhead power distribution lines based on electrothermal de-icing technology according to claim 1, characterized in that: The de-icing slider is equipped with a power battery pack. The hollow drill bit and the end of the de-icing slider away from the forward end are respectively equipped with an electric cleaning brush ring that wraps the auxiliary wire and the overhead power line. The electric cleaning brush ring is connected to the power battery pack via electrical wires.

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