Overhead transmission line and ground wire anti-falling safety protection device
By setting a limiting part at the end of the grounding lead to abut against the clamp, the problem of the grounding wire falling off due to broken hardware at the grounding point is solved, achieving higher power supply safety and reliability, while reducing the cost of modification.
Patent Information
- Application Number
- CN202511676505.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-02-06
AI Technical Summary
In existing technologies, when the ground wire mounting hardware breaks, the ground wire falls off, resulting in insufficient safe distance between the conductor and the ground wire, which can easily cause line tripping accidents. Moreover, the renovation cost is high and the hardware is prone to wear.
Design a grounding wire fall prevention safety protection device. The end of the grounding lead is provided with a limiting part that abuts against the wire clamp. The size of the limiting part is larger than the wire groove, which restricts the slippage of the grounding lead along the extension direction, prevents it from coming off, and enhances the connection stability.
It effectively prevents ground wires from falling off, avoids line tripping accidents, improves power supply safety and reliability, reduces renovation costs, and avoids hardware wear.
Smart Images
Figure CN121484773A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power transmission technology, and more specifically, to a ground wire fall protection device. Furthermore, this invention also provides an overhead power transmission line including the aforementioned ground wire fall protection device. Background Technology
[0002] The suspension hardware for the ground wire of overhead transmission lines is mostly in the form of a single suspension point. During operation, the ground wire suspension hardware is affected by natural factors such as wind, heat, and rain, as well as by manufacturing and construction errors, which can lead to hardware breakage.
[0003] In existing technologies, if the grounding wire suspension hardware breaks, the grounding wire falls off, resulting in insufficient safe distance between the conductor and the grounding wire. This can easily cause line tripping accidents and affect power supply reliability. Currently, the common method for converting single to double grounding wire suspension hardware is to add a backup clamp. However, this method is costly, and the installed hardware may be incompatible, leading to mutual wear and tear after installation.
[0004] In conclusion, how to prevent the ground wire from falling off after the ground wire mounting hardware breaks is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] In view of this, the purpose of the present invention is to provide a grounding wire anti-fall safety protection device, wherein the end of the grounding lead is provided with a limiting part for abutting against the wire clamp, which can effectively limit the slippage of the grounding lead along the extension direction, making the grounding lead less likely to come out, and improving the power supply safety and reliability.
[0006] In addition, the present invention also provides an overhead transmission line including the above-mentioned ground wire anti-fall safety protection device.
[0007] To achieve the above objectives, the present invention provides the following technical solution:
[0008] A grounding wire fall prevention safety protection device includes a grounding lead and a clamp for paralleling the grounding wire and the grounding lead. One end of the grounding lead is provided with a grounding terminal for connecting to a tower, and the other end of the grounding lead is provided with a limiting part for abutting against the clamp in order to limit the slippage of the grounding lead along the extension direction.
[0009] The wire clamp includes a first clamp plate, a second clamp plate, and a fastener. The inner surfaces of the first clamp plate and the second clamp plate are both provided in the wire groove. The fastener is used to connect the first clamp plate and the second clamp plate so that the grounding lead and the ground wire are clamped in the wire groove. The size of the limiting part is larger than the size of the wire groove.
[0010] Preferably, the first clamping plate and the second clamping plate are rotatably connected, and when the fastener is in the locked position, the inner surface of the first clamping plate and the inner surface of the second clamping plate come into contact and abut.
[0011] Preferably, the fastener includes a fastening bolt and a locking nut, and the locking nut is connected to the first clamping plate and the second clamping plate in sequence.
[0012] Preferably, there are at least two locking nuts, with one end of the inner locking nut abutting against the outer surface of the second clamping plate, and the other end of the inner locking nut abutting against the outer locking nut.
[0013] Preferably, the end of the fastening bolt protruding from the locking nut is provided with a limiting pin, the limiting pin having an extension along the radial direction of the fastening bolt, the limiting pin being used to limit the axial displacement of the locking nut.
[0014] Preferably, the fastening bolts are disposed between the first groove for installing the ground wire and the second groove for installing the grounding lead, and the fastening bolts are evenly distributed along the extension direction of the clamp.
[0015] Preferably, the tensile strength at the connection between the grounding lead and the grounding terminal is greater than or equal to 95% of the tensile strength of the grounding lead;
[0016] The tensile strength at the connection between the grounding lead and the limiting part is greater than or equal to 95% of the tensile strength of the grounding lead.
[0017] Preferably, the limiting part includes a clamp that is pressed against the end of the grounding lead.
[0018] An overhead transmission line has grounding devices on both sides of the ground wire suspension point, and the grounding devices include any of the above-mentioned ground wire anti-fall safety protection devices.
[0019] Preferably, when the ground wire is a non-independent double-string ground wire, the grounding lead is connected in series with the ground wire insulator of the tower.
[0020] The grounding wire anti-fall safety protection device provided by the present invention has a limiting part at the end of the grounding lead for abutting against the clamp. The size of the limiting part is larger than the size of the clamp groove, thereby limiting the slippage of the grounding lead along the extension direction, preventing the clamp fasteners from loosening and falling off, and the grounding lead from coming out. This prevents the grounding wire from falling off and the line tripping accident caused by insufficient safety distance between the conductor and the grounding wire, thus enhancing the safety and reliability of power supply.
[0021] In addition, the present invention also provides an overhead transmission line including the above-mentioned ground wire anti-fall safety protection device. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0023] Figure 1 A schematic diagram of a specific embodiment of the ground wire fall protection device provided by the present invention;
[0024] Figure 2 This is a front view schematic diagram of the wire clamp;
[0025] Figure 3 This is a rear view diagram of the wire clamp;
[0026] Figure 4 This is a schematic diagram of a specific embodiment of the overhead transmission line provided by the present invention;
[0027] Figure 5 This is a schematic diagram of a specific embodiment two of the overhead transmission line provided by the present invention;
[0028] Figure 6 This is a schematic diagram of the structure of a specific embodiment three of the overhead transmission line provided by the present invention.
[0029] Figures 1-6 middle:
[0030] 1-Ground wire; 2-Grounding lead; 21-Grounding terminal; 22-Limiting part; 3-Wire clamp; 4-Ground wire insulator. Detailed Implementation
[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0032] The core of this invention is to provide a grounding wire anti-fall safety protection device. The end of the grounding lead is provided with a limiting part for abutting against the wire clamp, which can effectively limit the slippage of the grounding lead along the extension direction, making the grounding lead less likely to come out, and improving the safety and reliability of power supply.
[0033] In addition, the present invention also provides an overhead transmission line including the above-mentioned ground wire anti-fall safety protection device.
[0034] The grounding wire fall prevention safety protection device provided by the present invention includes a grounding lead 2 and a clamp 3 for connecting the grounding wire 1 and the grounding lead 2. One end of the grounding lead 2 is provided with a grounding terminal 21 for connecting to the tower, and the other end of the grounding lead 2 is provided with a limiting part 22. The limiting part 22 is used to abut against the clamp 3 in order to limit the slippage of the grounding lead 2 along the extension direction.
[0035] The wire clamp 3 includes a first clamp plate, a second clamp plate, and a fastener. The inner surfaces of the first clamp plate and the second clamp plate are both located in the wire groove. The fastener is used to connect the first clamp plate and the second clamp plate so that the grounding lead 2 and the ground wire 1 are clamped in the wire groove. The size of the limiting part 22 is larger than the size of the wire groove.
[0036] Please refer to Figure 1 One end of the grounding lead 2 is provided with a grounding terminal 21. The grounding terminal 21 is used for tower connection to achieve tower connection. The specific type and model of the grounding terminal 21, the connection method between the grounding lead 2 and the grounding terminal 21, and the tower connection method of the grounding terminal 21 are determined according to the actual production needs and with reference to the existing technology, and will not be elaborated here.
[0037] The design tensile strength of the grounding lead 2 must be greater than or equal to the design tensile strength of the ground wire 1. The material of the grounding lead 2 can be the same as or different from that of the ground wire 1. Its specific material and size are determined according to the actual production needs and with reference to the existing technology. For example, in a specific embodiment, the grounding lead 2 is an aluminum-clad steel stranded wire, and the design tensile strength of the aluminum-clad steel stranded wire is greater than the design tensile strength of the ground wire 1.
[0038] The grounding lead 2 and the ground wire 1 are connected by a clamp 3. Preferably, the tensile strength of the clamp 3 is greater than or equal to the tensile strength of the grounding lead 2. It should be noted that the tensile strength here includes both lateral and longitudinal tensile strength. The clamp 3 includes clamping plates on both sides and fasteners for connecting the clamping plates. The clamping plates on both sides are used to form a groove that encloses the ground wire 1 and the grounding lead 2. The clamp 3 is provided with a first groove for installing the ground wire 1 and a second groove for installing the grounding lead 2. The shape of the first groove is adapted to the shape of the ground wire 1, and the shape of the second groove is adapted to the shape of the grounding lead 2. The fasteners can be specifically set as fastening bolts, connecting pins, etc.
[0039] It is understandable that, in order to improve the connection strength of the clamp 3, the number of fasteners is usually set to at least two, so as to achieve the redundancy of the fasteners and avoid the failure of the entire clamp 3 due to the loosening and falling off of a single fastener.
[0040] The specific shapes and dimensions of the first and second clamping plates, as well as the specific quantity and distribution of fasteners, are determined based on the design tensile strength requirements and design connection strength requirements of the wire clamp 3 in actual production. In order to facilitate the processing and manufacturing of the wire clamp 3, it is preferable to set the shape and dimensions of the first clamping plate to be the same as those of the second clamping plate.
[0041] The end of the grounding lead 2 is provided with a limiting part 22. The size of the limiting part 22 is larger than the size of the wire groove. By using the limiting part 22 and the end faces of the wire clamp 3 at both ends in the extension direction to abut against each other, the slippage of the grounding lead 2 relative to the ground wire 1 in the extension direction under its own weight is restricted. This avoids the grounding lead 2 from slipping and breaking the fastener when the fastener is loose after long-term use, thus preventing the wire clamp 3 from failing. This helps to extend the service life of the wire clamp 3.
[0042] The specific shape and size of the limiting part 22 are not limited. The limiting part 22 includes a clamp that is pressed against the end of the grounding lead 2. It has high tensile strength, which helps to ensure the connection stability and reliability of the limiting part 22 and the grounding lead 2. Of course, the limiting part 22 and the grounding lead 2 can also be set as an integral structure.
[0043] In this embodiment, the end of the grounding lead 2 is provided with a limiting part 22 for abutting against the clamp 3. The size of the limiting part 22 is larger than the size of the groove of the clamp 3, thereby limiting the slippage of the grounding lead 2 along the extension direction, preventing the fasteners of the clamp 3 from loosening and falling off, and the grounding lead 2 from coming off. This also prevents the ground wire 1 from falling off and the line tripping accident caused by insufficient safety distance between the conductor and the ground wire 1, thus enhancing the safety and reliability of power supply.
[0044] Preferably, the tensile strength at the connection between the grounding lead 2 and the grounding terminal 21 can be set to be greater than or equal to 95% of the tensile strength of the grounding lead 2; the tensile strength at the connection between the grounding lead 2 and the limiting part 22 can be greater than or equal to 95% of the tensile strength of the grounding lead 2, so as to avoid the grounding terminal 21 and the limiting part 22 affecting the overall tensile strength of the grounding lead 2, and ensure that the grounding lead 2 does not have a weak area with excessively weak compressive strength, thereby avoiding the grounding lead 2 being pulled off in the weak area, causing the grounding lead 2 to fall or the tower to fail.
[0045] Based on the above embodiments, the structure of the wire clamp 3 is further defined, with the first clamp plate and the second clamp plate being rotatably connected. When the fastener is in the locked position, the inner surfaces of the first clamp plate and the inner surfaces of the second clamp plate come into contact and abut.
[0046] The aforementioned rotatable connection can be either a rotatable connection between the first clamping plate and the second clamping plate via a pin, or, to facilitate the assembly of the wire clamp 3, preferably a connection between the first clamping plate and the second clamping plate via a hinge shaft.
[0047] During installation, it is preferable to position the shaft side of clamp 3 downwards, such as... Figure 1 As shown, this is to prevent the center of gravity of clamp 3 from shifting upwards and causing the ground wire 1 and grounding lead 2 to twist.
[0048] In this embodiment, the first clamp and the second clamp are rotatably connected. Compared with the clamps on both sides being set independently and connected only by fasteners, this helps to reduce the number of parts of the wire clamp 3, which simplifies the installation operation of the wire clamp 3 and avoids the problem of parts of the wire clamp 3 being lost.
[0049] Based on the above embodiments, the connection method of the fastener and the two side clamps is defined. The fastener includes a fastening bolt and a locking nut. The locking nut passes through the connection hole of the first clamp and the connection hole of the second clamp in sequence and is then connected to the locking nut.
[0050] The location of the fastening bolts will affect the magnitude and distribution of the locking force of the clamp 3. The fastening bolts can be set at the four corners of the clamp 3, or they can be set between the first groove for installing the ground wire 1 and the second groove for installing the grounding lead 2. The fastening bolts are evenly distributed along the extension direction of the clamp 3.
[0051] To improve the connection stability and reliability of the clamp 3 and prevent the ground wire 1 from falling off due to loose fasteners, at least two locking nuts can be provided. One end of the inner locking nut abuts against the outer surface of the second clamp plate, and the other end of the inner locking nut abuts against the outer locking nut. The locking nuts can be ordinary nuts or mechanical anti-loosening nuts.
[0052] Alternatively, a limiting pin can be provided at the end of the fastening bolt protruding from the lock nut. This limiting pin extends radially along the fastening bolt and is used to restrict the axial displacement of the lock nut. Figure 2 and Figure 3 As shown.
[0053] In addition to the aforementioned ground wire fall protection device, this invention also provides an overhead transmission line including the ground wire fall protection device disclosed in the above embodiments. Grounding devices are provided on both sides of the ground wire suspension point. The grounding devices are the ground wire fall protection devices disclosed in the above embodiments. For the structure of other parts of the ground wire fall protection device, please refer to the prior art, which will not be described in detail here.
[0054] For ground wire 1, which has a grounding device, the original grounding device can be directly removed. A set of ground wire fall protection devices is installed on both sides of the hanging point, such as... Figure 4 As shown;
[0055] For ground wire 1 without a grounding device, a set of ground wire fall protection devices is installed directly on both sides of the hanging point, such as... Figure 5 As shown.
[0056] In this embodiment, the ground wire fall protection device has a simple structure, is easy to assemble, and is not easy to loosen or break. Furthermore, the cost of converting a single device to a double device is low. Since the ground wire fall protection devices are located on both sides of the hanging point, the problem of friction between the modified hardware is avoided, and the device has strong adaptability to modification.
[0057] When ground wire 1 is a non-independent double-string ground wire, grounding lead 2 is connected in series with the ground wire insulator 4 of the tower. The specific series connection method of grounding lead 2 and ground wire insulator 4 is determined according to actual production needs. For example, please refer to [reference needed]. Figure 6 The end of the grounding lead 2 is provided with a grounding terminal 21. The grounding lead 2 is connected to the tower through the grounding terminal 21 - bowl head hanging plate - ground wire insulator 4 - ball head hanging ring - first U-shaped ring - second U-shaped ring - tower.
[0058] It should be noted that the first and second clamping plates, the first and second wire grooves, and the first and second U-shaped rings in this application are only used to distinguish different positions and do not limit the order.
[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0060] The above provides a detailed description of the overhead transmission line and ground wire fall protection device provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.
Claims
1. A ground wire fall protection safety device, characterized in that, It includes a grounding lead (2) and a clamp (3) for connecting the ground wire (1) and the grounding lead (2). One end of the grounding lead (2) is provided with a grounding terminal (21) for connecting to the tower, and the other end of the grounding lead (2) is provided with a limiting part (22). The limiting part (22) is used to abut against the clamp (3) in order to limit the sliding of the grounding lead (2) along the extension direction. The wire clamp (3) includes a first clamp plate, a second clamp plate and a fastener. The inner surfaces of the first clamp plate and the second clamp plate are both located in the wire groove. The fastener is used to connect the first clamp plate and the second clamp plate so that the grounding lead (2) and the ground wire (1) are locked in the wire groove. The size of the limiting part (22) is larger than the size of the wire groove.
2. The ground wire fall protection device according to claim 1, characterized in that, The first clamping plate and the second clamping plate are rotatably connected. When the fastener is in the locked position, the inner surfaces of the first clamping plate and the inner surfaces of the second clamping plate come into contact and abut.
3. The ground wire fall protection device according to claim 1, characterized in that, The fasteners include fastening bolts and locking nuts. The locking nuts pass through the connecting holes of the first clamping plate and the second clamping plate in sequence and are then connected to the locking nuts.
4. The ground wire fall protection device according to claim 3, characterized in that, The number of locking nuts is at least two. One end of the inner locking nut abuts against the outer surface of the second clamping plate, and the other end of the inner locking nut abuts against the outer locking nut.
5. The ground wire fall protection device according to claim 3, characterized in that, The end of the fastening bolt protruding from the locking nut is provided with a limiting pin, which extends radially along the fastening bolt and is used to limit the axial displacement of the locking nut.
6. The ground wire fall protection device according to claim 3, characterized in that, The fastening bolts are located between the first groove for installing the ground wire (1) and the second groove for installing the grounding lead (2), and the fastening bolts are evenly distributed along the extension direction of the clamp (3).
7. The ground wire fall protection device according to any one of claims 1-6, characterized in that, The tensile strength at the connection between the grounding lead (2) and the grounding terminal (21) is greater than or equal to 95% of the tensile strength of the grounding lead (2); The tensile strength at the connection between the grounding lead (2) and the limiting part (22) is greater than or equal to 95% of the tensile strength of the grounding lead (2).
8. The ground wire fall protection device according to any one of claims 1-6, characterized in that, The limiting part (22) includes a clamp that is pressed against the end of the grounding lead (2).
9. An overhead transmission line, characterized in that, Grounding devices are provided on both sides of the grounding wire (1) hanging point, and the grounding devices include the grounding wire anti-fall safety protection device as described in any one of claims 1-8.
10. The overhead transmission line according to claim 9, characterized in that, When the ground wire (1) is a non-independent double-string ground wire, the grounding lead (2) is connected in series with the ground wire insulator (4) of the tower.