Flexible adjustable disconnection prevention device for overhead transmission line

Abstract

A flexible adjustable anti-dropping device for an overhead transmission line relates to the technical field of wire erection and comprises a crescent hanging plate, a fitting string, a rotary hanging plate and a wedge-shaped wire clamp which can be connected in sequence. The crescent hanging plate comprises two crescent plates which are arranged on two sides of the large triangular yoke plate; the fitting string at least comprises a steel wire traction rope and an annular bolt which can be connected in sequence; the rotating hanging plate comprises two rotating plates which are symmetrically arranged, and one ends of the two rotating plates are connected through a connecting piece; a dividing column parallel to the rotating axis of the two rotating plates is further arranged between the two rotating plates, a groove with an opening facing the connecting piece is formed in the dividing column, a limiting screw rod is arranged on a wire clamping plate of the wedge-shaped wire clamp, and the limiting screw rod can abut against the dividing column to limit the rotating angle of the rotating hanging plate. And the groove is positioned between the root part of the separation column and the abutting point of the separation column and the limiting screw rod. The device is used for solving the technical problem that an anti-dropping device of a hanging-point-free power transmission line is not easy to install.

Description

Technical Field

[0001] This utility model relates to the field of power line installation technology, specifically a flexible and adjustable anti-drop device for overhead power transmission lines. Background Technology

[0002] The cables (such as ground wires and conductors) of overhead power transmission lines are mostly connected to the transmission towers using corresponding clamps. Transmission lines traverse various types of terrain and are easily affected by factors such as temperature, rainfall, snowfall, and wind damage, which can cause the clamps to slip.

[0003] In recent years, varying degrees of cable slippage and clamp misalignment have frequently occurred in icing sections. This is mainly due to the significant thickness of the ice layer, which greatly increases the overall load on the cables. Furthermore, the uneven distribution of ice on both sides of the transmission towers (both large and small sections) leads to an imbalance of forces on both sides of the clamps, causing them to slip towards the side with greater tension. When the unbalanced tension generated by adjacent cable spans exceeds the clamp's gripping force, a sudden slippage and instability of one tower can occur, generating a multiplied impact force. This can then cause clamp slippage and hardware misalignment at other tower locations. Without timely repair and handling, this poses a significant safety hazard.

[0004] Therefore, it is crucial to install an anti-drop device on the transmission tower that connects to the cable. When the cable clamp slips or breaks, the anti-drop device can promptly clamp the cable, preventing it from falling or impacting adjacent cables and mitigating the impact on power transmission. However, in practical applications, the applicant has found that some transmission towers lack mounting points such as construction holes at the tower head or crossarm, making it impossible to install anti-drop devices and seriously affecting the safe and stable operation of the line. Utility Model Content

[0005] The present invention aims to provide a flexible and adjustable anti-drop device for overhead transmission lines, so as to solve the technical problem that anti-drop devices for transmission lines without hanging points are not easy to install.

[0006] To solve the above technical problems, the specific solution adopted by this utility model is as follows: a flexible and adjustable anti-drop device for overhead transmission lines, comprising a crescent-shaped hanging plate, a hardware string, a rotating hanging plate and a wedge-shaped wire clamp that can be connected in sequence;

[0007] The crescent-shaped hanging plate includes two crescent-shaped plates for being installed on both sides of the large triangular connecting plate. At least three connecting bolts are provided between the two crescent-shaped plates. One end of the crescent-shaped hanging plate can extend beyond the large triangular connecting plate and be connected to the metal string.

[0008] The hardware string includes at least a steel wire traction rope and a ring bolt that can be connected in sequence;

[0009] The rotating mounting plate includes two symmetrically arranged rotating plates. One end of the two rotating plates is connected by a connector, and the other end of the two rotating plates is rotatably connected to both sides of the housing of the wedge-shaped wire clamp. The threaded part of the annular bolt passes through the connector and is provided with a rotating nut.

[0010] A dividing post parallel to its rotation axis is provided between the two rotating plates. The dividing post has a groove with an opening facing the connector. A limit screw is provided on the clamping plate of the wedge-shaped wire clamp. The limit screw can abut against the dividing post to limit the rotation angle of the rotating hanging plate. The groove is located between the root of the dividing post and the abutment point between the dividing post and the limit screw.

[0011] As a further optimization of the above technical solution, a right-angled plate is connected to the end of the crescent-shaped hanging plate away from the metal string. The right-angled plate is long and narrow, and there are two crescent-shaped hanging plates that are spaced apart on the right-angled hanging plate. The two crescent-shaped plates of the same crescent-shaped hanging plate are located on both sides of the right-angled hanging plate.

[0012] As a further optimization of the above technical solution, a right-angled plate is connected to the end of the crescent-shaped hanging plate away from the metal string. The right-angled plate includes a connecting plate and a protrusion set at one end of the connecting plate. The crescent-shaped hanging plate is connected to the protrusion, and the two crescent-shaped plates are located on both sides of the protrusion. The connecting plate is provided with mounting holes for fixing it to the large triangular connecting plate.

[0013] As a further optimization of the above technical solution, there are two crescent-shaped hanging plates, which are spaced apart on the convex strip.

[0014] As a further optimization of the above technical solution, the crescent plate includes a fixing section and a hanging point section. The fixing section and the hanging point section are integrally formed or hinged. A connecting bolt is provided at the junction of the fixing section and the hanging point section, and a connecting bolt is provided at the end of the fixing section and the hanging point section respectively.

[0015] As a further optimization of the above technical solution, the depth of the groove is 1 / 2 of the diameter of the dividing column.

[0016] As a further optimization of the above technical solution, the groove is a V-shaped groove with a cross-sectional angle of 90°.

[0017] As a further optimization of the above technical solution, the groove is opened at the root of the dividing column.

[0018] As a further optimization of the above technical solution, the hardware string includes a steel wire traction rope, and / or a Z-shaped hanging plate, and / or an extension rod, and / or a U-shaped hanging ring and annular bolt connected in sequence.

[0019] As a further optimization of the above technical solution, the wire rope includes a wire rope body and two loops set at both ends of the wire rope body.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. This utility model solves the problem that the anti-drop-off device is difficult to install when there are no hanging points on the overhead transmission line by setting a crescent-shaped hanging plate to provide a hanging point for the installation of the anti-drop-off device.

[0022] 2. This utility model reduces the weight of the metal string by incorporating the steel wire traction rope as part of the metal string, thereby reducing the load on the cable from the anti-drop device. The screw part of the ring bolt passes through the connector of the rotating hanging plate and is equipped with a rotating nut. The length of the metal string is adjusted by controlling the degree of screwing of the rotating nut in the screw part. After the anti-drop device is installed in the target position, the tension of the metal string can be controlled by adjusting the degree of screwing of the rotating nut in the screw part, thus achieving adjustable flexibility and straightness of the metal string.

[0023] 3. When using this utility model, the crescent-shaped hanging plate is installed on the large triangular connecting plate. The metal string is controlled to be located on one side of the cable by the crescent-shaped hanging plate and the rotating hanging plate, so as to avoid the metal string from contacting the cable and causing wear on the cable and its upper clamp.

[0024] The rotating mounting plate is rotatably connected to the housing of the wedge clamp. Under normal conditions, the limiting screw on the clamp plate abuts against the dividing post to limit the tilt angle of the rotating mounting plate, keeping the metal string away from the cable. When the cable is impacted or the clamp is damaged, the cable moves away from the clamp. At this time, the crescent-shaped mounting plate pulls the housing of the wedge clamp through the metal string and the rotating mounting plate. The clamp plate holding the cable moves away from the ground clamp along with the cable. The limiting bolt on the clamp plate breaks the dividing post, allowing the clamp plate to enter the housing of the wedge clamp and further clamp the cable, ensuring that the cable does not fall off when the ground clamp is damaged, thus providing a function to prevent cable drop. Attached Figure Description

[0025] Figure 1 This is a side view of Example 1;

[0026] Figure 2 This is a top view of Example 1;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of a power transmission line being impacted and the split column breaking.

[0029] Figure 5 This is a schematic diagram of the steel wire traction rope.

[0030] Figure 6 This is a front view structural diagram of the dividing column;

[0031] Figure 7 This is a side view of the structure of the dividing column;

[0032] Figure 8 This is a schematic diagram showing the connection between the right-angle hanging plate and the crescent-shaped hanging plate in Example 2;

[0033] Figure 9 This is a side view of the right-angle hanging plate in Example 2;

[0034] Figure 10 A schematic diagram of the connection between the right-angle hanging plate and the crescent-shaped hanging plate in Example 1;

[0035] Reference numerals: 1. Large triangular connecting plate; 2. Right-angle hanging plate; 201. Protruding strip; 202. Connecting plate; 3. Crescent hanging plate; 301. Crescent plate; 3011. Fixed section; 3012. Hanging point section; 302. Connecting bolt; 4. Steel wire traction rope; 401. Steel wire rope body; 402. Pressure tube; 403. Loop; 5. Z-shaped hanging plate; 6. Extension rod; 7. U-shaped hanging ring; 8. Ring bolt; 801. Ring part; 802. Screw part; 9. Rotating nut; 10. Rotating hanging plate; 1001. Rotating plate; 1002. Connector; 11. Wire; 12. Wedge-shaped wire clamp; 1201. Wire clamp plate; 1202. Housing; 13. Rotating shaft; 14. Limiting screw; 15. Dividing column; 16. Groove; 17. Wire clamp. Detailed Implementation

[0036] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art.

[0037] Example 1

[0038] like Figure 1-3 As shown, this utility model discloses a flexible adjustable anti-drop device for overhead transmission lines, which can be used in the connection of ground wires or conductors. The structure of the anti-drop device is described below using a conductor as an example.

[0039] The anti-drop device includes a crescent-shaped hanging plate 3, a metal fitting string, a rotating hanging plate 10, and a wedge-shaped wire clamp 12 that can be connected in sequence. The crescent-shaped hanging plate 3 is used to install on the large triangular connecting plate 1 of the transmission tower. One end of the crescent-shaped hanging plate 3 can extend beyond the large triangular connecting plate 1 and be connected to the metal string.

[0040] Specifically, the crescent-shaped mounting plate 3 includes two crescent-shaped plates 301 of the same size, and at least three connecting bolts 302 are provided between the two crescent-shaped plates 301. In this embodiment, there are three connecting bolts 302. The crescent-shaped plate 301 includes a long strip-shaped fixing section 3011 and a hanging point section 3012. The fixing section 3011 and the hanging point section 3012 are of the same size, and the included angle formed by the two is an obtuse angle. The junction of the fixing section 3011 and the hanging point section 3012 is the middle part of the crescent-shaped plate 301. The fixing section 3011 and the hanging point section 3012 are integrally formed. A connecting bolt 302 is provided at the junction of the fixing section 3011 and the hanging point section 3012. The end of the fixing section 3011 and the hanging point section 3012 away from the junction is the end of the corresponding section. A connecting bolt 302 is provided at the end of the fixing section 3011 and the hanging point section 3012 respectively. The relative distance between the two crescent plates 301 can be controlled by the degree of screwing in the nut on the connecting bolt 302. The hanging point section 3012 extends beyond the large triangular connecting plate 1 and extends away from the conductor 11. The connecting bolt 302 at the end of the hanging point section 3012 and the two hanging point sections 3012 together form a hanging point for the metal string to be installed, and there is a certain distance between the hanging point and the conductor 11.

[0041] It is understood that in other embodiments of this utility model, multiple connecting bolts 302 may be provided depending on the width of the crescent plate 301.

[0042] Combination Figure 10 As shown, a right-angled hanging plate 2 is connected to the end of the crescent-shaped hanging plate 3 away from the metal string. The right-angled hanging plate 2 is a strip plate with a rectangular cross-section. There are two crescent-shaped hanging plates 3, which are spaced apart along the length of the right-angled hanging plate 2. The two crescent-shaped hanging plates 3 are arranged in a V-shape, and the metal string is connected to one of the crescent-shaped hanging plates 3. The two crescent plates 301 of the same crescent-shaped hanging plate 3 are located on both sides of the right-angled hanging plate 2. The crescent plates 301 are installed on the right-angled hanging plate 2 by connecting bolts 302 located at the ends of their fixing sections 3011.

[0043] The large triangular connecting plate 1 on the transmission tower is an obtuse triangle, consisting of one long straight side and two hypotenuses. The included angle formed by the two hypotenuses is obtuse, while the included angles formed between the long straight side and the two hypotenuses are acute. Through holes are provided at both the obtuse and acute angles of the large triangular connecting plate 1. The large triangular connecting plate 1 is connected to a suitable position on the transmission tower (not shown in the figure) through the through hole at the acute angle, and connected to the clamp 17 of the conductor 11 through the through hole at the obtuse angle. Therefore, in overhead transmission lines, the long right-angled side of the large triangular connecting plate 1 is unused.

[0044] In this embodiment, two crescent-shaped plates 301 are respectively placed on both sides of the large triangular connecting plate 1. The two fixing sections 3011 are pressed against the two sides of the large triangular connecting plate 1, and the right-angle hanging plate 2 is pressed against the long straight edge of the large triangular connecting plate 1. The middle of the two crescent-shaped hanging plates 3 is close to the two hypotenuses of the large triangular connecting plate 1. The included angle between the fixing section 3011 and the right-angle hanging plate 2 is adjusted so that the connecting bolt 302 in the middle of the crescent-shaped hanging plate 3 abuts against the hypotenuse of the large triangular connecting plate 1. The connecting bolt 302 in the middle of the two crescent-shaped hanging plates 3 is tightened to realize the installation of the crescent-shaped hanging plates 3 on the large triangular connecting plate 1. In order to ensure the stability of the crescent-shaped plates 301 on the large triangular connecting plate 1, the connecting bolt 302 between the fixing section 3011 and the right-angle hanging plate 2 is also tightened after installation.

[0045] In this embodiment, the right-angle hanging plate 2 and the two crescent-shaped hanging plates 3 are installed on the outside of the large triangular connecting plate 1. The two crescent-shaped hanging plates 3 are symmetrically arranged. When the crescent-shaped hanging plate 3 connected with the metal string is pulled by the force to pull the right-angle hanging plate 2, the bolt 302 in the middle of the other crescent-shaped hanging plate 3 is pressed against the inclined side of the large triangular connecting plate, which restrains the movement of the right-angle hanging plate 2 and prevents the crescent-shaped hanging plate 3 from falling off the large triangular connecting plate 1.

[0046] The connecting components of the metal string include a steel wire traction rope 4, a Z-shaped hanging plate 5, an extension rod 6, a U-shaped hanging ring 7, and an annular bolt 8, which are connected sequentially. Figure 5 As shown, the wire rope 4 includes a wire rope body 401 and two collars 403 disposed at both ends of the wire rope body 401. A pressure tube 402 is disposed between the two collars 403 and the wire rope body 401. As part of the hardware string, the wire rope 4 can prevent friction between the connecting hardware string and the conductor 11 and reduce the weight of the connecting hardware string. The diameter of the wire rope 4 is designed according to the calculated breaking force of the conductor 11. The wire rope 4 has a certain degree of flexibility and can be straightened under force to avoid friction with the conductor 11. One of the collars 403 of the wire rope 4 is placed between the two hanging point sections 3012 of a crescent-shaped hanging plate 301, and then the connecting bolt 302 is installed at the end of the hanging point section 3012, with the connecting bolt 302 passing through the collar 403, thus realizing the connection between the crescent-shaped hanging plate 3 and the wire rope 4.

[0047] The connection between the steel wire traction rope 4, the Z-shaped hanging plate 5, the extension rod 6 and the U-shaped hanging ring 7 is existing technology and will not be described in detail here. The ring bolt 8 includes a ring part 801 and a screw part 802. The ring part 801 is connected to the U-shaped hanging ring 7, and the screw part 802 is equipped with a rotating nut 9.

[0048] It should be noted that in other embodiments of this utility model, the metal string includes a steel wire traction rope 4, and / or a Z-shaped hanging plate 5 and / or an extension rod 6, and / or a U-shaped hanging ring 7 and annular bolt 8 connected in sequence. Different numbers of metal string connecting parts can be selected according to the actual length requirements, as long as the metal string has a steel wire traction rope 4 and annular bolt 8.

[0049] The rotating mounting plate 10 includes two symmetrically arranged rotating plates 1001. The rotating plates 1001 are elongated. One end of the two rotating plates 1001 is connected by a connector 1002. Both rotating plates 1001 have through holes. The connector 1002 includes a connecting post in the middle and rotating shafts at both ends of the connecting post. The two rotating shafts are respectively inserted into the through holes of the two rotating plates 1001. Both rotating plates 1001 are rotatably connected to the connector 1002. The other end of the two rotating plates 1001 is rotatably connected to both sides of the housing 1202 of the wedge-shaped wire clamp 12. A through hole for the screw part 802 to pass through is provided radially along the connecting post of the connector 1002. The rotating nut 9 is located on the screw part 802 that passes through the connector 1002. The length of the metal string can be adjusted by controlling the degree of screwing of the rotating nut 9 into the screw section 802. Furthermore, after the anti-drop device is installed at the target position, the tension of the metal string can be controlled by adjusting the degree of screwing of the rotating nut 9 into the screw section 802, thus achieving adjustable flexibility and straightness of the metal string.

[0050] like Figure 2 , 3 As shown in Figures 6 and 7, a dividing post 15 parallel to the rotation axis is also provided between the two rotating plates 1001. The dividing post 15 is fixed on one of the rotating plates 1001, and the end of the dividing post 15 that is fixed to the rotating plate 1001 is its root. A groove 16 with an opening facing the connector 1002 is provided on the dividing post 15.

[0051] The structure of the wedge clamp 12 is existing technology. For ease of understanding, its structure is briefly described as follows: The wedge clamp 12 includes a housing 1202 and a clamping plate 1201 that can be inserted into the housing 1202. The clamping plate 1201 consists of two oppositely arranged pieces. Each of the two clamping plates 1201 has a strip groove on its opposite side. In use, the wire 11 is placed in the strip groove between the two clamping plates 1201, and the clamping plate 1201 holding the wire 11 is controlled to enter the housing 1202 to achieve further clamping and fixation.

[0052] Each clamping plate 1201 has two threaded holes symmetrically arranged on both sides of the wire 11. Two limiting screws 14 are also provided to cooperate with the threaded holes. Each limiting screw 14 passes sequentially through the threaded holes of the two clamping plates 1201 to connect them, clamping the wire 11 between the two clamping plates 1201. The line connecting the two limiting screws 14 is parallel to the axis of the dividing post 15. The length of the limiting screws 14 is controlled so that after connecting the two clamping plates 1201, the limiting screws 14 are higher than the surface of the clamping plates 1201, and can abut against the dividing post 15 when the rotating hanging plate 10 rotates around the housing 1202 to limit the rotation angle of the rotating hanging plate 10. The dividing post 15 and the two limiting screws 14 have two contact points. The contact point closer to the root of the dividing post 15 is designated as the inner contact point, and the contact point farther from the root of the dividing post 15 is designated as the outer contact point. The groove 16 on the dividing post 15 is located between the root of the dividing post 15 and the inner contact point, so that the limiting screws 14 can break the dividing post 15 under force, and the clamping plate 1201 holding the wire 11 moves into the housing 1202 to further clamp the wire 11. In addition, the limiting screws 14 can also prevent the clamping plate 1201 from completely entering the housing 1202.

[0053] Furthermore, the groove 16 is formed at the root of the dividing post 15, so as to reduce the obstruction of the limiting screw 14 by the residual part of the dividing post 15 when the groove 16 is broken by impact.

[0054] The depth of the groove 16 is 1 / 3 to 2 / 3 of the diameter of the dividing post 15. In this embodiment, the depth of the groove 16 is 1 / 2 of the diameter of the dividing post 15. The groove 16 is a V-shaped groove with a cross-sectional angle of 90°.

[0055] In use, the crescent-shaped hanging plate 3 is installed on the large triangular connecting plate 1. Depending on the orientation of the large triangular connecting plate 1, the metal string of the anti-drop device is set above or to one side of the conductor 11. When the large triangular connecting plate 1 is set vertically, the metal string of the anti-drop device is located above the conductor 11. When the large triangular connecting plate 1 is set horizontally, the metal string of the anti-drop device is located to one side of the conductor 11.

[0056] Taking the vertical setting of the large triangular connecting plate 1 as an example, both the crescent hanging plate 3 and the rotating hanging plate 10 have a certain angle of elevation, so that the metal string is located above the wire 11 and maintains a certain distance from the wire 11, so as to avoid the metal string from contacting the wire 11 and causing wear on the wire 11 and its upper clamp 17.

[0057] Combination Figure 3 , 4As shown, under normal conditions, the limiting screw 14 on the clamping plate 1201 abuts against the dividing post 15 to limit the tilt angle of the rotating hanging plate 10, causing the metal string to move away from the wire 11; when the wire 11 is impacted or the clamp 17 is damaged, the wire 11 slides away from the clamp 17 (i.e., towards) Figure 4 (Sliding to the right side), at this time, the crescent hanging plate 3 tightens the housing 1201 of the wedge clamp 12 through the metal string and rotating hanging plate 10. The clamping plate 1201 holding the wire 11 moves away from the wire clamp 17 as the wire 11 moves. The limiting screw 14 on the clamping plate 1201 breaks the dividing post 15, thereby causing the clamping plate 1201 to enter the housing 1202 of the wedge clamp 12, further clamping the wire 11, ensuring that the wire 11 will not fall off when the wire clamp 17 is damaged, thus playing the function of preventing wire from falling off.

[0058] Example 2

[0059] This embodiment has the same overall structure as Embodiment 1 or 2, the difference being: Figure 8 , 9 As shown, in this embodiment, the right-angle mounting plate 2 is T-shaped, including a connecting plate 202 and an elongated protrusion 201 disposed at one end of the connecting plate 202. The height of the protrusion 201 exceeds the surface of the connecting plate 202, and the angle between the sidewall of the protrusion 201 and the surface of the connecting plate 202 is a right angle. The fixing end 3011 of the crescent-shaped mounting plate 3 is mounted on the protrusion 201 by connecting bolts 302, and the two crescent-shaped plates 301 are located on both sides of the protrusion 201. The commercially available large triangular connecting plate 1 has through holes on its surface, and the connecting plate 202 has mounting holes for fixing it to the large triangular connecting plate 1.

[0060] In use, the protrusion 201 of the right-angle mounting plate 2 is close to the long straight edge of the large triangular connecting plate 1, the connecting plate 202 of the right-angle mounting plate 2 is in contact with the plate surface on one side of the large triangular connecting plate 1, and is fixed by bolts passing through the mounting holes of the connecting plate 202 and the through holes of the large triangular connecting plate 1. The fixing section 3011 is located on both sides of the large triangular connecting plate 1, and the fixing end 3011 is clamped to the outside of the large triangular connecting plate 1 by tightening the connecting bolt 302 in the middle of the crescent plate 301.

[0061] To further enhance the stability of the crescent plate 301 on the large triangular connecting plate 1, two crescent plates 3 are provided and spaced apart on the protrusion 201. During use, the central connecting bolts 302 of the two crescent plates 3 are located on the two inclined sides of the large triangular connecting plate 1, further preventing slippage and ensuring the stability of the crescent plates 3.

[0062] Example 3

[0063] The overall structure of this embodiment is the same as that of embodiment 1. The difference is that in this embodiment, only a crescent-shaped hanging plate 3 is set and the right-angle hanging plate 2 is omitted. The two crescent plates 301 of the crescent hanging plate 3 are clamped on both sides of the large triangular connecting plate 1 and fastened by connecting bolts 302 to realize the installation of the crescent hanging plate 3 on the large triangular connecting plate 1.

[0064] In this embodiment, two crescent plates 301 are respectively set on both sides of the large triangular connecting plate 1. The two fixing sections 3011 are close to the two sides of the large triangular connecting plate 1. The ends of the fixing sections 3011 are close to the long right-angle side of the large triangular connecting plate 1, and the middle part of the crescent plate 301 is close to one of the hypotenuses of the large triangular connecting plate 1. The two fixing sections 3011 are clamped to the outside of the large triangular connecting plate 1 by the connecting bolts 302 at the ends of the fixing sections 3011 and the connecting bolts 302 in the middle of the crescent plate 301, so as to fix the crescent plate 301 on the large triangular connecting plate 1. The connection method of other components is the same as that in embodiment 1, and will not be described again here.

[0065] Example 4

[0066] This embodiment has the same overall structure as Embodiment 1, except that in this embodiment, the fixed section 3011 and the hanging point section 3012 are hinged together. Both the fixed section 3011 and the hanging point section 3012 have through holes for the connecting bolts 302 to pass through at their adjacent ends. By setting the fixed section 3011 and the hanging point section 3012 as a two-section structure that is hinged together, the angle of the hanging point section 3012 can be adjusted by twisting the middle connecting bolt 302 of the crescent hanging plate 3 after the fixed section 3011 is fixed to the large triangular connecting plate 1.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible adjustable anti-drop device for overhead transmission lines, characterized in that, It includes a crescent-shaped mounting plate (3), a hardware string, a rotating mounting plate (10), and a wedge-shaped clamp (12) that can be connected in sequence. The crescent-shaped hanging plate (3) includes two crescent-shaped plates (301) for setting on both sides of the large triangular connecting plate (1). At least three connecting bolts (302) are provided between the two crescent-shaped plates (301). One end of the crescent-shaped hanging plate (3) can extend beyond the large triangular connecting plate (1) and be connected to the metal string. The hardware string includes at least a steel wire traction rope (4) and a ring bolt (8) that can be connected in sequence. The rotating hanging plate (10) includes two symmetrically arranged rotating plates (1001). One end of the two rotating plates (1001) is connected by a connector (1002), and the other end of the two rotating plates (1001) is rotatably connected to both sides of the housing (1202) of the wedge clamp (12). The screw part (802) of the ring bolt (8) passes through the connector (1002) and is provided with a rotating nut (9). A dividing post (15) parallel to the rotation axis is provided between the two rotating plates (1001). The dividing post (15) has a groove (16) with an opening facing the connector (1002). A limiting screw (14) is provided on the clamping plate (1201) of the wedge clamp (12). The limiting screw (14) can abut against the dividing post (15) to limit the rotation angle of the rotating hanging plate (10). The groove (16) is located between the root of the dividing post (15) and the abutment point between the dividing post (15) and the limiting screw (14).

2. The flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The crescent-shaped hanging plate (3) is connected to a right-angle hanging plate (2) at the end away from the metal string. The right-angle hanging plate (2) is long and narrow. There are two crescent-shaped hanging plates (3) and they are spaced apart on the right-angle hanging plate (2). The two crescent plates (301) of the same crescent-shaped hanging plate (3) are located on both sides of the right-angle hanging plate (2).

3. The flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The crescent-shaped hanging plate (3) is connected to a right-angle hanging plate (2) at the end away from the metal string. The right-angle hanging plate (2) includes a connecting plate (202) and a protrusion (201) set at one end of the connecting plate (202). The crescent-shaped hanging plate (3) is connected to the protrusion (201), and the two crescent plates (301) are located on both sides of the protrusion (201). The connecting plate (202) has mounting holes for fixing it to the large triangular connecting plate (1).

4. A flexible adjustable anti-drop device for overhead transmission lines according to claim 3, characterized in that, There are two crescent-shaped hanging panels (3) and they are spaced apart on the convex strip (201).

5. A flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The crescent plate (301) includes a fixed section (3011) and a hanging point section (3012). The fixed section (3011) and the hanging point section (3012) are integrally formed or hinged. A connecting bolt (302) is provided at the junction of the fixed section (3011) and the hanging point section (3012). A connecting bolt (302) is provided at the end of the fixed section (3011) and the hanging point section (3012).

6. A flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The depth of the groove (16) is half the diameter of the dividing column (15).

7. A flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The groove (16) is a V-shaped groove with a cross-sectional angle of 90°.

8. A flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The groove (16) is formed at the root of the dividing column (15).

9. A flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The hardware string includes a steel wire traction rope (4), and / or a Z-shaped hanging plate (5), and / or an extension rod (6), and / or a U-shaped hanging ring (7) and an annular bolt (8) connected in sequence.

10. A flexible adjustable anti-drop device for overhead transmission lines according to claim 1, characterized in that, The wire rope (4) includes a wire rope body (401) and two loops (403) set at both ends of the wire rope body (401).

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