A prefabricated tension string device for overhead transmission lines

Abstract

This invention discloses a prefabricated tension string device for overhead transmission lines, relating to the field of power fittings technology. Several disc-shaped insulating covers are hinged between a first U-shaped clamp and a second U-shaped clamp, with the first U-shaped clamp hinged at the corner of a wedge-shaped tension clamp. The wedge-shaped tension clamp has a front wedge groove and an end wedge groove. Several pairs of arc-shaped clamping plates are formed on the bottom wall of the front wedge groove. Several U-shaped threaded rods are fitted onto the wedge-shaped tension clamp, and several fixing connecting plates are fixed to it. The U-shaped threaded rods pass through the fixing connecting plates and are threadedly locked with a pair of self-locking nuts. A T-shaped seat is fixed in the middle of the U-shaped threaded rod, and a pressing mechanism is installed on the T-shaped seat. This invention can be disassembled for transport and is suitable for complex terrain; the arc-shaped clamping plates and the pressing mechanism provide double clamping for the transmission line, adapting to transmission lines of different diameters and preventing loosening; the components are detachable, making installation and maintenance convenient, reducing costs, and improving efficiency and power supply reliability.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology, and in particular to a prefabricated tension string device for overhead transmission lines. Background Technology

[0002] In the construction and operation of overhead transmission lines, tension strings are the core components for fixing the tension and providing insulation protection of the transmission lines. They are widely used in key nodes such as tower corners and terminals. In actual construction, workers need to connect and install the tension strings to the transmission lines and towers on high-altitude towers. The construction environment often involves complex terrain such as mountains, hills, and crossing rivers, making it difficult for transport vehicles to reach the base of the towers directly. The components need to be transported to the work site by manpower or cableway. At the same time, field operations are greatly affected by the weather and installation needs to be completed within a limited window of opportunity to avoid delays due to rain or strong winds.

[0003] Traditional tension strings have several problems: the insulation components and tension clamps are mostly fixedly connected, making the whole unit large and heavy, difficult to transport in inconvenient areas such as mountainous regions; the connection angle is fixed during installation, requiring additional steering hardware, which increases costs; the tension clamps rely on a single clamping plate or wedge block to hold the transmission line, and if the diameter of the transmission line is off, it is easy to loosen, resulting in an imbalance of stress on the tension string; during maintenance, the insulation components need to be disassembled and replaced as a whole due to aging, and the power outage time is long, affecting the reliability of power supply. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of poor adaptability of prefabricated tension strings in the prior art, which leads to low installation efficiency, and proposes a prefabricated tension string device for overhead transmission lines.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0006] An assembled tension string device for overhead transmission lines includes a first U-shaped clamp, a second U-shaped clamp, and a wedge-shaped tension clamp. Several disc-shaped insulating covers capable of detachable connection are hinged between the first and second U-shaped clamps. The first U-shaped clamp is hinged at the corner of the wedge-shaped tension clamp. The wedge-shaped tension clamp has L-shaped through-type front and rear wedge-shaped grooves, and an integrally formed L-shaped hook is fixed to the end of the wedge-shaped tension clamp.

[0007] The bottom wall of the front wedge-shaped groove has several U-shaped notches distributed at equal intervals. A pair of arc-shaped clamps for clamping the transmission line are installed in the U-shaped notches by means of hinge. Several U-shaped threaded rods are sleeved on the top surface of the wedge-shaped tension clamp. Several fixed connecting plates are fixed on the bottom surface of the wedge-shaped tension clamp. The two ends of the U-shaped threaded rods pass through the two ends of the fixed connecting plates and are locked with a pair of self-locking nuts by thread engagement. A T-shaped seat is fixed in the middle of the U-shaped threaded rod. The top of the T-shaped seat has a fixing notch for fixing the U-shaped threaded rod. A pressing mechanism for fixing the transmission line is installed on the T-shaped seat.

[0008] Preferably, a pair of fixing rings are symmetrically fixed at the corner of the wedge-shaped tension clamp, and a third bolt is installed between the pair of fixing rings by means of hinge. The first U-shaped clamp is sleeved on the third bolt by means of hinge.

[0009] Preferably, a threaded short rod and a threaded sleeve are fixedly provided on the middle part of both sides of the disc-shaped insulating cover, and the threaded short rod is inserted into the threaded sleeve on the adjacent disc-shaped insulating cover by a screw engagement.

[0010] Preferably, a first bolt is installed in the opening of the first U-shaped clamp by means of hinge, a first pull ring is installed on the first bolt by means of hinge, a threaded connecting cylinder is fixed on the first pull ring, and a threaded short rod on the disc-shaped insulating cover adjacent to the first U-shaped clamp is inserted into the threaded connecting cylinder and fixed by thread engagement.

[0011] Preferably, a second bolt is installed in the opening of the second U-shaped clamp by means of a hinge, a second pull ring is installed on the second bolt by means of a hinge, and a threaded connecting rod is fixed on the second pull ring. The threaded connecting rod is inserted into the threaded sleeve on the disc-shaped insulating cover adjacent to the second U-shaped clamp by a screw engagement.

[0012] Preferably, a fixed coupling is fixedly provided at the bottom of the U-shaped notch, wherein a first notch is provided at the middle position of the bottom of one arc-shaped clamping plate and is installed on both sides of the fixed coupling by hinge, and a second notch is provided at both sides of the bottom of another arc-shaped clamping plate and is installed in the middle of the fixed coupling by hinge.

[0013] Preferably, the two side walls of the U-shaped notch are provided with two pairs of through-distributed elliptical pin holes, and the outer side of the arc-shaped clamp is fixed with a pair of limiting pins. The outer end of each limiting pin is slidably inserted into the elliptical pin hole, and the inner end of each limiting pin is fitted with a tension spring. The two ends of the tension spring are fixedly connected to the arc-shaped clamp and the inner wall of the U-shaped notch, respectively.

[0014] Preferably, the top surface of the wedge-shaped tension clamp is provided with several pairs of arc-shaped slots for accommodating U-shaped threaded rods, the middle part of the fixing plate is provided with an arc-shaped groove for fixing the wedge-shaped tension clamp, and the two ends of the fixing plate are provided with a pair of semi-circular notches for the U-shaped threaded rods to pass through.

[0015] Preferably, the pressing mechanism includes a notched gear and a pressing swing arm. The bottom surface of the T-shaped seat is provided with a trapezoidal slot. A pair of torsion couplings are installed in the trapezoidal slot by means of hinge. A pair of notched gears are fixed on both sides of the torsion couplings, and adjacent pairs of notched gears are connected by tooth meshing. The notched part of the notched gear on the same side is fixed with a pressing swing arm. The bottom of the pressing swing arm is provided with an arc-shaped notch for fixing the power transmission line.

[0016] Preferably, a pair of notches II are provided on both sides of the trapezoidal slot, a notch I is provided on the downward pressure swing arm, a torque spring is sleeved in the middle of the torque coupling, and the two ends of the torque spring extend outward and are respectively locked in the notches I and II on the same side.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, in the construction scenarios of power transmission lines in mountainous areas and other places with inconvenient transportation, the device can be disassembled and transported. The disc-shaped insulating cover is spliced ​​together by threaded short rods and threaded sleeves. The first U-shaped clamp is connected to the disc-shaped insulating cover by the first pull ring and the threaded connecting sleeve. The second U-shaped clamp is connected by the second pull ring and the threaded connecting rod. There is no need for overall transportation. High-altitude assembly is convenient and the operation time on the tower is shortened.

[0019] 2. In this invention, during field construction, after the transmission line is inserted into the wedge-shaped groove of the wedge-shaped tension clamp, the arc-shaped clamp plate rotates around the fixed coupling shaft, the limiting pin slides along the elliptical pin hole, the tension spring deforms to generate tension, and drives the arc-shaped clamp plate to adaptively tighten against transmission lines of different diameters, so as to avoid loosening due to the diameter deviation of the transmission line, and adapt to the installation of multiple specifications of transmission lines.

[0020] 3. In this invention, the operation of transmission lines is greatly affected by wind vibration and icing. After the arc-shaped clamping plate initially clamps the transmission line in the device, the U-shaped threaded rod is inserted into the arc-shaped slot and fixed by the fixing connecting plate and the self-locking nut. The downward pressing arm of the T-shaped seat pressing mechanism rotates with the notched gear, the arc-shaped notch fits the transmission line, the torque spring increases the force, and the double fixing prevents the transmission line from sliding and wearing.

[0021] 4. In this invention, when the disc-shaped insulating cover ages and needs to be replaced, there is no need to disassemble the entire device. Only the fasteners at the corresponding threaded short rod and threaded sleeve need to be removed for replacement. During power transmission line maintenance, the clamping structure can be adjusted by loosening the self-locking nut and removing the U-shaped threaded rod, thereby reducing power outage maintenance time and improving power supply reliability. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0025] Figure 3 This is an exploded view of the overall structure of the present invention;

[0026] Figure 4 This is a structural diagram of the wedge-shaped tension clamp of the present invention;

[0027] Figure 5 This is a cross-sectional view of the wedge-shaped tension clamp structure of the present invention;

[0028] Figure 6 This is an exploded cross-sectional view of the wedge-shaped tension clamp structure of the present invention;

[0029] Figure 7 This is an exploded cross-sectional view of the wedge-shaped tension clamp and several pairs of arc-shaped clamping plates of the present invention.

[0030] Figure 8 This is an exploded view of the U-shaped threaded rod and fixed connecting plate structure of the present invention;

[0031] Figure 9 This is an exploded view of the T-shaped seat and a pair of downward-pressing swing arms structure of the present invention;

[0032] Figure 10 This is an exploded bottom view of the T-shaped seat and a pair of downward-pressing swing arms structure of the present invention;

[0033] The numbers in the diagram are as follows: 100, wedge-shaped tension clamp; 101, end wedge groove; 102, front wedge groove; 103, fixing ring; 104, third bolt; 105, L-shaped hook; 106, U-shaped notch; 107, elliptical pin hole; 108, fixing coupling; 109, arc-shaped groove; 110, arc-shaped clamping plate; 111, limiting pin; 112, tension spring; 200, first U-shaped clamp; 201, first bolt; 202, first pull ring; 203, threaded connecting cylinder; 204. 205. Disc-shaped insulating cover; 206. Threaded short rod; 207. Threaded sleeve; 208. Second pull ring; 209. Threaded connecting rod; 200. Second U-shaped clamp; 210. Second bolt; 300. U-shaped threaded rod; 301. Fixed connecting plate; 302. Self-locking nut; 303. T-shaped seat; 304. Trapezoidal slot; 305. Torque coupling; 306. Notched gear; 307. Downward pressure swing arm; 308. Torque spring; 309. Notch one; 310. Notch two; 311. Arc-shaped notch. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Example 1: This example provides a prefabricated tension string device for overhead transmission lines. See [link to example]. Figures 1 to 10 Specifically, it includes a first U-shaped clamp 200, a second U-shaped clamp 209, and a wedge-shaped tension clamp 100. The first U-shaped clamp 200 enables the rotational adaptation and connection of different components. The second U-shaped clamp 209 connects to other external fixed structures to achieve balanced fixation at both ends of the device. Several disc-shaped insulating covers 204 that can be detachably connected are installed between the first U-shaped clamp 200 and the second U-shaped clamp 209 via a hinge. The disc-shaped insulating covers 204 are core insulating components that prevent leakage of the transmission line. Several disc-shaped insulating covers 204 form the insulating support section of the device, and the first U-shaped clamp 200 is connected via a hinge. The wedge-shaped tension clamp 100 is installed at the corner of the wedge-shaped tension clamp 100. The wedge-shaped tension clamp 100 is the core load-bearing component, providing a basic framework for clamping, fixing and installing other components of the transmission line, and realizing the tension fixing function of the transmission line as a whole. The wedge-shaped tension clamp 100 is provided with a front wedge groove 102 and a rear wedge groove 101 distributed in an L-shape. The rear end of the wedge-shaped tension clamp 100 is fixed with an integrally formed L-shaped hook 105. The front wedge groove 102 and the rear wedge groove 101 cooperate to form an L-shaped through distribution for the transmission line to pass through, realizing the initial path planning and positioning of the transmission line in the clamp body.

[0036] The bottom wall of the front wedge groove 102 has several equidistantly distributed U-shaped notches 106. The U-shaped notches 106 provide installation space for components such as the arc-shaped clamp 110 and the fixed coupling 108, and also assist in the initial positioning of the transmission line. A pair of arc-shaped clamps 110 for clamping the transmission line are installed in the U-shaped notches 106 by hinge. The arc-shaped clamps 110 achieve the initial clamping and positioning of the transmission line. With the help of the tension spring 112, they can adaptively clamp transmission lines of different diameters. Several equidistantly distributed U-shaped threaded rods 300 are sleeved on the top surface of the wedge-shaped tension clamp 100, and several equidistantly distributed fixed couplings are fixed on the bottom surface of the wedge-shaped tension clamp 100. Plate 301, the two ends of the U-shaped threaded rod 300 pass through the two ends of the fixed connecting plate 301 and are locked with a pair of self-locking nuts 302 through thread engagement, fixing the U-shaped threaded rod 300 on the wedge-shaped tension clamp 100 to prevent the U-shaped threaded rod 300 from loosening. A T-shaped seat 303 is fixed in the middle of the U-shaped threaded rod 300. The top of the T-shaped seat 303 has a fixing notch for fixing the U-shaped threaded rod 300. A pressing mechanism for fixing the transmission line is installed on the T-shaped seat 303. The T-shaped seat 303 provides installation space and a fixing foundation for the pressing mechanism, and is positioned with the U-shaped threaded rod 300 to ensure that the pressing mechanism acts on the corresponding position of the transmission line.

[0037] In the specific implementation process, such as Figure 1 and Figure 3 As shown, a pair of fixing rings 103 are symmetrically fixed at the corner of the wedge-shaped tension clamp 100, and a third bolt 104 is installed between the pair of fixing rings 103 by a hinge. The first U-shaped clamp 200 is hinged onto the third bolt 104. The third bolt 104 includes a third bolt and a matching third nut and a third cotter pin. The fixing rings 103 provide hinged mounting points for the third bolt 104, thus realizing the connection between the wedge-shaped tension clamp 100 and the first U-shaped clamp. The detachable hinged connection of 200; threaded short rods 205 and threaded sleeves 206 are respectively fixed in the middle of the two sides of the disc-shaped insulating cover 204, and the threaded short rods 205 are inserted into the threaded sleeves 206 on the adjacent disc-shaped insulating covers 204 by a screw engagement. The threaded short rods 205 realize the assembly and fixation between the disc-shaped insulating covers 204 and with the first U-shaped clamp 200. The threaded sleeves 206 provide threaded interfaces for the assembly between the disc-shaped insulating covers 204 and with the second U-shaped clamp 209.

[0038] A first bolt 201 is hingedly installed inside the opening of the first U-shaped clamp 200. The first bolt 201 includes a first bolt and a matching first nut and a first cotter pin. The first bolt 201 provides a hinged mounting base for the first pull ring 202, enabling a detachable connection between the first pull ring 202 and the first U-shaped clamp 200. The first pull ring 202 is hingedly installed on the first bolt 201. The first pull ring 202 is used for the connection and transition between the first U-shaped clamp 200 and the adjacent disc-shaped insulating cover 204, providing a certain degree of turning flexibility. A threaded connecting cylinder 203 is fixed on the first pull ring 202. The threaded short rod 205 on the disc-shaped insulating cover 204 adjacent to the first U-shaped clamp 200 is inserted into the threaded connecting cylinder 203 and fixed by thread engagement, thus enabling a detachable fixation between the first U-shaped clamp 200 and the disc-shaped insulating cover 204.

[0039] A second bolt 210 is hingedly installed inside the opening of the second U-shaped clamp 209. The second bolt 210 includes a second bolt and matching second nut and second cotter pin. The second bolt 210 provides a hinged mounting point for the second pull ring 207, enabling a detachable connection between the second pull ring 207 and the second U-shaped clamp 209. The second pull ring 207 is hingedly installed on the second bolt 210, facilitating the transition between the second U-shaped clamp 209 and the adjacent disc-shaped insulating cover 204, providing directional adaptability. A threaded connecting rod 208 is fixed on the second pull ring 207. The threaded connecting rod 208 is inserted into the threaded sleeve 206 on the disc-shaped insulating cover 204 adjacent to the second U-shaped clamp 209 by a screw fit, so as to realize the detachable fixation of the second U-shaped clamp 209 and the disc-shaped insulating cover 204. A fourth nut and a fourth cotter pin are provided on several threaded short rods 205 and threaded connecting rods 208. The fourth nut and the fourth cotter pin provide secondary reinforcement to the threaded connection part to prevent the threads from loosening and ensure the overall connection stability of several disc-shaped insulating covers 204.

[0040] It should be noted that: in this embodiment, as Figure 6 and Figure 8 As shown, the top surface of the wedge-shaped tension clamp 100 is provided with several pairs of arc-shaped slots 109 for accommodating the U-shaped threaded rod 300. The arc-shaped slots 109 are used to engage and accommodate the U-shaped threaded rod 300, ensuring that the U-shaped threaded rod 300 is installed in a precise position and preventing lateral displacement. The middle part of the fixing plate 301 is provided with an arc-shaped groove for fixing the wedge-shaped tension clamp 100, and the two ends of the fixing plate 301 are provided with a pair of semi-circular notches for the U-shaped threaded rod 300 to pass through.

[0041] The working principle of this embodiment is as follows: First, several disc-shaped insulating covers 204 are assembled: between the first U-shaped clamp 200 and the second U-shaped clamp 209, several disc-shaped insulating covers 204 are installed in sequence; adjacent disc-shaped insulating covers 204 are screwed together with threaded sleeves 206 through their own matching threaded short rods 205 to achieve threaded locking and fixing of adjacent components; wherein, the first U-shaped clamp 200 is connected to the first pull ring 202 through the first bolt 201 hinged in its opening, and the threaded connecting sleeve 203 fixed on the first pull ring 202 is threadedly locked and fixed with the threaded short rods 205 of the adjacent disc-shaped insulating covers 204 to complete the connection between the first U-shaped clamp 200 and several disc-shaped insulating covers 204;

[0042] The second U-shaped clamp 209 is connected to the second pull ring 207 via a second bolt 210 hinged in its opening. The threaded connecting rod 208 fixed on the second pull ring 207 is screwed into and locked to the threaded sleeve 206 of the adjacent disc-shaped insulating cover 204, thus completing the connection between the second U-shaped clamp 209 and several disc-shaped insulating covers 204. Simultaneously, all threaded short rods 205 and threaded connecting rods 208 are further reinforced with matching fourth nuts and fourth cotter pins to ensure the overall connection stability of the insulating assembly. Subsequently, the wedge-shaped tension clamp 100 is hinged to the first U-shaped clamp 200: using a pair of symmetrically fixed fixing rings 103 at the corner of the wedge-shaped tension clamp 100, a third bolt 104 is hinged between the two fixing rings 103, and the first U-shaped clamp 200 is hinged onto the third bolt 104, thus achieving the connection between the wedge-shaped tension clamp 100 and several disc-shaped insulating covers 204.

[0043] Next, the initial installation and positioning of the transmission line are carried out: the transmission line to be fixed is passed sequentially through the L-shaped through-type front wedge groove 102 and end wedge groove 101 on the wedge tension clamp 100, completing the initial installation of the transmission line; during this process, each pair of arc-shaped clamping plates 110 installed by hinge in several equidistantly distributed U-shaped notches 106 on the bottom wall of the front wedge groove 102 will initially clamp the transmission line, realizing the initial positioning and fixing of the transmission line within the wedge tension clamp 100; finally, the transmission line is reinforced and locked in a secondary manner: several U-shaped threaded rods 300 are sequentially sleeved on the top surface of the wedge tension clamp 100, and the U-shaped threaded rods 300 need to be engaged with several pairs of arc-shaped slots corresponding to the top surface of the wedge tension clamp 100. Within step 109, ensure the U-shaped threaded rod 300 is installed in a precise position. Then, allow both ends of the U-shaped threaded rod 300 to pass through the semi-circular notches at both ends of several equidistantly distributed fixing plates 301 fixed on the bottom surface of the wedge-shaped tension clamp 100, and lock them in place using self-locking nuts 302 that are threaded into the U-shaped threaded rod 300, thus completing the installation of the U-shaped threaded rod 300 on the wedge-shaped tension clamp 100. At the same time, using the pressing mechanism installed on the T-shaped seat 303 fixed in the middle of the U-shaped threaded rod 300, apply downward pressure to the initially clamped transmission line, thereby achieving a second clamping and fixation of the transmission line within the wedge-shaped tension clamp 100. Finally, through the double clamping structure of initial clamping by the arc-shaped clamping plate 110 and secondary fixation by the pressing mechanism, ensure that the transmission line is installed firmly and under stable force.

[0044] Example 2: Based on Example 1, this example adds a fixed coupling 108, a limiting pin 111, and a tension spring 112 within the U-shaped notch 106, and optimizes the hinge structure between the arc-shaped clamping plate 110 and the fixed coupling 108. This solves the problems of poor adaptability of the arc-shaped clamping plate 110 to transmission lines of different diameters and insufficient clamping tension in Example 1, achieving more stable adaptive clamping of the transmission line. It also includes:

[0045] In the specific implementation process, such as Figure 6 and Figure 7 As shown, a fixed coupling 108 is fixedly installed at the bottom of the U-shaped notch 106. The fixed coupling 108 provides a differentiated hinge installation base for the arc-shaped clamp 110, allowing the arc-shaped clamp 110 to rotate adaptively around it. One arc-shaped clamp 110 has a first notch at the bottom center and is installed on both sides of the fixed coupling 108 by hinge. The other arc-shaped clamp 110 has a second notch at the bottom sides and is installed in the middle of the fixed coupling 108 by hinge.

[0046] Two pairs of through-hole elliptical pin holes 107 are provided on both sides of the U-shaped notch 106. The elliptical pin holes 107 are for the sliding insertion of the limiting pin shaft 111 to limit the rotation trajectory of the arc-shaped clamping plate 110 and prevent it from deviating. A pair of limiting pin shafts 111 are fixed on the outer side of the arc-shaped clamping plate 110. The limiting pin shafts 111 limit the rotation range and trajectory of the arc-shaped clamping plate 110 and provide a mounting point for the tension spring 112. The outer end of each limiting pin shaft 111 is slidably inserted into the elliptical pin hole 107, and the inner end of each limiting pin shaft 111 is fitted with a tension spring 112. The two ends of the tension spring 112 are fixedly connected to the arc-shaped clamping plate 110 and the inner wall of the U-shaped notch 106, respectively. The tension spring 112 is elastically deformed by the rotation of the arc-shaped clamping plate 110, releasing continuous tension and driving the arc-shaped clamping plate 110 to adaptively press against the power transmission line, thereby enhancing the initial clamping stability.

[0047] The working principle of this embodiment is as follows: When the transmission line passes through the wedge groove 102 at the front end of the wedge tension clamp 100, the transmission line is inserted downwards into several pairs of arc-shaped clamping plates 110 in the U-shaped notch 106 at the bottom wall of the front wedge groove 102; since the pair of arc-shaped clamping plates 110 and the fixed coupling 108 fixed at the bottom of the U-shaped notch 106 adopt a differentiated hinge design, the squeezing force of the transmission line will drive the pair of arc-shaped clamping plates 110 to rotate adaptively around the fixed coupling 108; during this process, the pair of limiting pins 111 fixed on the outer side of the arc-shaped clamping plates 110 will slide synchronously along the two pairs of through elliptical pin holes 107 opened on both sides of the U-shaped notch 106 to ensure that the rotation trajectory of the arc-shaped clamping plates 110 is stable and does not deviate.

[0048] Meanwhile, the tension spring 112 fitted inside each limiting pin 111 will undergo elastic deformation due to the rotation of the arc-shaped clamp 110, thereby releasing continuous tension. This tension reacts to the arc-shaped clamp 110, causing several pairs of arc-shaped clamps 110 to adaptively press against each other on the surface of the transmission line, ultimately achieving stable clamping of transmission lines of different diameters and preventing the transmission line from shifting due to loose clamping.

[0049] Example 3: Based on Example 2, this example solves the problems of unclear structure of the pressing mechanism and poor adjustability of the secondary clamping force on the transmission line in Example 2 by setting a pressing mechanism consisting of a torsion coupling 305, a meshing notched gear 306, a pressing swing arm 307 with an arc-shaped notch 311, and a torque spring 308 in the trapezoidal slot 304 of the T-shaped seat 303. This achieves more controllable and stable secondary pressurization and fixing of the transmission line. It also includes:

[0050] In the specific implementation process, such as Figure 9 and Figure 10As shown, the pressing mechanism includes a notched gear 306 and a pressing swing arm 307. A trapezoidal slot 304 is provided on the bottom surface of the T-shaped seat 303. The trapezoidal slot 304 provides mounting cavities for the pressing mechanism components such as the torque coupling 305 and the notched gear 306, limiting the mounting position and range of motion of the pressing mechanism components. A pair of torque couplings 305 are hingedly mounted within the trapezoidal slot 304. The torque couplings 305 provide rotation shafts for the notched gear 306 and the pressing swing arm 307, transmitting torque. A pair of notched gears are fixed on both sides of the torque coupling 305. 306, and a pair of adjacent notched gears 306 are connected by tooth meshing, which converts the opening action of the downward swing arm 307 into synchronous reverse rotation, ensuring that the action of the pair of downward swing arms 307 is coordinated. The notched part of the notched gear 306 on the same side is fixed with the downward swing arm 307. The bottom of the downward swing arm 307 is provided with an arc-shaped notch 311 for fixing the transmission line. The arc-shaped notch 311 fits the surface of the transmission line, increases the contact area with the transmission line, avoids excessive local pressure from damaging the transmission line, and improves the stability of the secondary clamping.

[0051] The trapezoidal slot 304 has a pair of notches 310 on both sides, the downward swing arm 307 has a notch 309, and the torque coupling 305 is fitted with a torque spring 308 in the middle. The torque spring 308 is elastically deformed by the rotation of the torque coupling 305, releasing the reverse torque force and providing continuous clamping force for the downward swing arm 307. The two ends of the torque spring 308 extend outward and are respectively locked in the notch 309 and notch 310 on the same side. The notch 309 and notch 310 provide deformation support for the torque spring 308.

[0052] The working principle of this embodiment is as follows: After the initial installation of the transmission line is completed, the installation operation of the U-shaped threaded rod 300 and the pressing mechanism is started: several U-shaped threaded rods 300 are sequentially sleeved on the top surface of the wedge-shaped tension clamp 100 according to the preset position, and are engaged in the corresponding arc-shaped slot 109, and the two ends of the U-shaped threaded rod 300 pass through the fixing plate 301 on the bottom surface of the wedge-shaped tension clamp 100 and are locked and fixed by the self-locking nut 302; as the U-shaped threaded rod 300 is installed in place, the T-shaped seat 303 fixed in the middle is simultaneously positioned to the corresponding area of ​​the front wedge-shaped slot 102;

[0053] During this process, the pressing mechanism in the trapezoidal slot 304 on the bottom surface of the T-shaped seat 303 enters the working state: a pair of torsion couplings 305 are installed in the trapezoidal slot 304 by means of hinge, and the notched gears 306 fixed on both sides of each torsion coupling 305 mesh with each other; when the T-shaped seat 303 moves down close to the transmission line, the transmission line will generate an upward pushing force on the pressing arm 307, driving the pressing arm 307 to open around the torsion coupling 305, thereby driving the meshing notched gears 306 to rotate synchronously in the opposite direction. As the notched gears 306 mesh and rotate, the arc-shaped notches 311 opened at the bottom of the pair of pressing arms 307 gradually fit against the surface of the transmission line, and finally press down against the outside of the transmission line.

[0054] At the same time, the torque spring 308 sleeved in the middle of the torque coupling 305 will undergo elastic deformation due to the rotation of the torque coupling 305, generating a reverse torque force; this torque force continues to act on the downward pressure swing arm 307, further increasing the clamping force applied to the transmission line by the downward pressure swing arm 307 through the arc-shaped notch 311. Finally, under the dual action of the initial clamping of the arc-shaped clamping plate 110 and the torque pressure fixing of the downward pressure mechanism, the transmission line is ensured to be installed firmly and with uniform force.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated tension string device for overhead transmission lines, comprising a first U-shaped clamp (200), a second U-shaped clamp (209), and a wedge-shaped tension clamp (100), characterized in that: A plurality of disc-shaped insulating covers (204) are hinged between the first U-shaped clamp (200) and the second U-shaped clamp (209), and the first U-shaped clamp (200) is hinged at the corner of the wedge-shaped tension clamp (100); the wedge-shaped tension clamp (100) is provided with a front wedge groove (102) and an end wedge groove (101), and an L-shaped hook (105) is fixed at the end of the wedge-shaped tension clamp (100); a plurality of U-shaped notches (106) are provided on the bottom wall of the front wedge groove (102). A pair of arc-shaped clamping plates (110) are hinged inside the U-shaped notch (106). Several U-shaped threaded rods (300) are sleeved on the wedge-shaped tension clamp (100). Several fixed connecting plates (301) are fixed on the wedge-shaped tension clamp (100). The U-shaped threaded rods (300) pass through the fixed connecting plates (301) and are threadedly locked with a pair of self-locking nuts (302). A T-shaped seat (303) is fixed in the middle of the U-shaped threaded rods (300). A pressing mechanism is installed on the T-shaped seat (303). A fixed coupling (108) is fixedly installed at the bottom of the U-shaped notch (106). One arc-shaped clamping plate (110) has a first notch at its bottom center and is hinged to both sides of the fixed coupling (108). Another arc-shaped clamping plate (110) has a second notch at its bottom sides and is hinged to the middle of the fixed coupling (108). Two pairs of elliptical pin holes (107) are provided on the side walls of the U-shaped notch (106). A pair of limiting pins (111) are fixedly installed on the outer side of the arc-shaped clamping plate (110). The outer end of the limiting pin (111) is slidably inserted into the elliptical pin hole (107), and a tension spring (11) is sleeved on the inner end of the limiting pin (111). 2) The two ends of the tension spring (112) are fixedly connected to the inner wall of the arc-shaped clamp (110) and the U-shaped notch (106); the pressing mechanism includes a notched gear (306) and a pressing swing arm (307). The bottom surface of the T-shaped seat (303) is provided with a trapezoidal slot (304). A pair of torsion couplings (305) are hinged in the trapezoidal slot (304). A pair of notched gears (306) are fixed on both sides of the torsion coupling (305), and adjacent pairs of notched gears (306) are meshed. The notched part of the notched gear (306) on the same side is fixed with a pressing swing arm (307). The bottom of the pressing swing arm (307) is provided with an arc-shaped notch (311).

2. The prefabricated tension string device for overhead transmission lines according to claim 1, characterized in that: A pair of fixing rings (103) are fixed at the corner of the wedge-shaped tension clamp (100), and a third bolt (104) is hinged between the pair of fixing rings (103). The first U-shaped clamp (200) is hinged on the third bolt (104).

3. The prefabricated tension string device for overhead transmission lines according to claim 2, characterized in that: The disc-shaped insulating cover (204) is fixed with threaded short rods (205) and threaded sleeves (206) on both sides, and the threaded short rods (205) are spirally inserted into the threaded sleeves (206) on the adjacent disc-shaped insulating cover (204).

4. The prefabricated tension string device for overhead transmission lines according to claim 3, characterized in that: A first bolt (201) is hingedly installed inside the opening of the first U-shaped clamp (200). A first pull ring (202) is hingedly installed on the first bolt (201). A threaded connecting cylinder (203) is fixed on the first pull ring (202). A threaded short rod (205) on the disc-shaped insulating cover (204) adjacent to the first U-shaped clamp (200) is helically inserted into the threaded connecting cylinder (203).

5. A prefabricated tension string device for overhead transmission lines according to claim 3, characterized in that: A second bolt (210) is hingedly installed inside the opening of the second U-shaped clamp (209). A second pull ring (207) is hingedly installed on the second bolt (210). A threaded connecting rod (208) is fixed on the second pull ring (207). The threaded connecting rod (208) is helically inserted into the threaded sleeve (206) on the disc-shaped insulating cover (204) adjacent to the second U-shaped clamp (209).

6. The prefabricated tension string device for overhead transmission lines according to claim 1, characterized in that: The wedge-shaped tension clamp (100) has several pairs of arc-shaped slots (109), the middle part of the fixed connecting plate (301) has an arc-shaped groove, and the two ends of the fixed connecting plate (301) have a pair of semi-circular notches.

7. A prefabricated tension string device for overhead transmission lines according to claim 1, characterized in that: The trapezoidal slot (304) has a pair of notches two (310) on both sides, the downward swing arm (307) has a notch one (309), the torque coupling (305) has a torque spring (308) sleeved in the middle, and the two ends of the torque spring (308) extend outward and are locked in the notches one (309) and notches two (310) on the same side.

Images