Fabricated strain insulator string device for overhead transmission line

Abstract

The invention discloses a fabricated strain insulator string device for an overhead transmission line, and relates to the technical field of electric power fittings, a plurality of disc-shaped insulating covers are hinged between a first U-shaped clamp and a second U-shaped clamp, and the first U-shaped clamp is hinged to the corner of a wedge-shaped strain clamp; a front end wedge-shaped groove and a tail end wedge-shaped groove are formed in the wedge-shaped strain clamp, a plurality of pairs of arc-shaped clamping plates are arranged on the inner bottom wall of the front end wedge-shaped groove, a plurality of U-shaped threaded rods are arranged on the wedge-shaped strain clamp in a sleeving mode, a plurality of fixed connecting plates are fixedly arranged on the wedge-shaped strain clamp, and the U-shaped threaded rods penetrate through the fixed connecting plates and are locked with a pair of self-locking nuts in a threaded mode. And a T-shaped seat is fixedly arranged in the middle of the U-shaped threaded rod, and a pressing mechanism is mounted on the T-shaped seat. The device can be transported in a split mode and is adaptive to complex terrains; the arc-shaped clamping plate and the downward pressing mechanism clamp the power transmission line in a dual mode, adapt to power transmission lines with different diameters and prevent looseness. Components are detachable, installation and maintenance are convenient, cost is reduced, and efficiency and power supply reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power fittings, and in particular to an assembled tension string device for overhead power transmission lines. Background Art

[0002] In the construction and maintenance of overhead transmission lines, tension strings are core components for maintaining line tension and providing insulation protection. They are widely used at key nodes such as tower corners and terminals. During actual construction, workers must connect and install the tension strings to the transmission lines and towers from high-altitude towers. Furthermore, construction often involves complex terrain, such as mountainous areas, hilly terrain, and river crossings. Direct access to the towers by transport vehicles is difficult, and components must be transported to the work site manually or by cableway. Furthermore, field operations are significantly affected by weather, requiring installation to be completed within a limited window to avoid delays caused by rain and strong winds.

[0003] Traditional tension strings have many problems: the insulation components and tension clamps are mostly fixedly connected, the whole body is large and heavy, and it is difficult to transport to inconvenient areas such as mountainous areas. The connection angle is fixed during installation, and additional steering hardware is required to increase costs; the tension clamps rely on a single clamping plate or wedge block to clamp the transmission line, and the transmission line diameter deviation is prone to loosening, resulting in unbalanced force on the tension string. During maintenance, the insulation components age and need to be disassembled and replaced as a whole. Long power outages affect power supply reliability. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that poor adaptability of assembled tension strings leads to low installation efficiency, and to propose an assembled tension string device for overhead transmission lines.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: An assembled tension string device for an overhead transmission line comprises 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 hingedly mounted between the first and second U-shaped clamps, and the first U-shaped clamp is hingedly mounted at the corners of the wedge-shaped tension clamp. The wedge-shaped tension clamp is provided with a front wedge-shaped groove and a rear wedge-shaped groove extending therethrough in an L-shape. An integrally formed L-shaped hook is fixed to the rear end of the wedge-shaped tension clamp. The bottom wall of the front end wedge-shaped groove is provided with a plurality of equally spaced U-shaped notches, and a pair of arc-shaped clamps for clamping the transmission line are hingedly installed in the U-shaped notches. A plurality of equally spaced U-shaped threaded rods are sleeved on the top surface of the wedge-shaped tension clamp, and a plurality of equally spaced fixed connecting plates are fixed on the bottom surface of the wedge-shaped tension clamp. The two ends of the U-shaped threaded rod pass through the two ends of the fixed connecting plate and are locked by threaded cooperation with a pair of self-locking nuts. A T-shaped seat is fixed in the middle of the U-shaped threaded rod, and a fixing notch for fixing the U-shaped threaded rod is provided on the top of the T-shaped seat, and a downward pressing mechanism for fixing the transmission line is installed on the T-shaped seat.

[0006] Preferably, a pair of fixing rings are symmetrically fixed at the corners of the wedge-shaped tension clamp, and a third bolt member is hingedly installed between the pair of fixing rings, and the first U-shaped clamp is hingedly sleeved on the third bolt member.

[0007] Preferably, a threaded short rod and a threaded sleeve are respectively fixed on the middle of the two side surfaces of the disc-shaped insulating cover, and the threaded short rod is inserted into the threaded sleeve on the adjacent disc-shaped insulating cover through screw fitting.

[0008] Preferably, a first bolt member is installed in the opening of the first U-shaped clamp in a hinged manner, a first pull ring is installed on the first bolt member in a hinged manner, a threaded connection tube 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 connection tube and fixed through threaded cooperation.

[0009] Preferably, a second bolt member is hingedly installed in the opening of the second U-shaped clamp, a second pull ring is hingedly installed on the second bolt member, a threaded connecting rod is fixed on the second pull ring, and the threaded connecting rod is inserted into a threaded sleeve on the disc-shaped insulating cover adjacent to the second U-shaped clamp through spiral fitting.

[0010] Preferably, a fixed coupling is fixed at the bottom of the U-shaped notch, wherein a first notch is opened at the middle position of the bottom of one arc-shaped splint and is installed on both sides of the fixed coupling by a hinged manner, and a second notch is opened at both sides of the bottom of the other arc-shaped splint and is installed in the middle of the fixed coupling by a hinged manner.

[0011] Preferably, two pairs of through-distributed elliptical pin holes are provided on both side walls of the U-shaped notch, and a pair of limiting pins are fixed on the outer side surface of the arc-shaped splint, the outer end portion of each limiting pin is slidably inserted into the elliptical pin hole, and the inner end portion of each limiting pin is sleeved with a tension spring, and the two ends of the tension spring are respectively fixedly connected to the arc-shaped splint and the inner wall of the U-shaped notch.

[0012] Preferably, a plurality of pairs of arc-shaped slots for accommodating U-shaped threaded rods are provided on the top surface of the wedge-shaped tension clamp, an arc-shaped slot for fixing the wedge-shaped tension clamp is provided in the middle of the fixed connecting plate, and a pair of semicircular notches for the U-shaped threaded rods to pass through are provided at both ends of the fixed connecting plate.

[0013] Preferably, the downward pressure mechanism includes a notched gear and a downward pressure swing arm. A trapezoidal slot is provided on the bottom surface of the T-shaped seat. A pair of torsion couplings are hingedly installed in the trapezoidal slot. A pair of notched gears are fixed on both sides of the torsion coupling, and the adjacent pair of notched gears are connected by tooth meshing. A downward pressure swing arm is fixed on the notched part of the notched gears on the same side, and an arc-shaped notch is provided at the bottom of the downward pressure swing arm for fixing the transmission line.

[0014] Preferably, a pair of notches 2 are provided on both sides of the trapezoidal slot, a notch 1 is provided on the downward pressure swing arm, a torque spring is sleeved on the middle part of the torsion coupling, and the two ends of the torque spring extend outward and are respectively clamped in notch 1 and notch 2 on the same side.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, in transmission line construction scenarios with inconvenient transportation, such as mountainous areas, the device can be disassembled and transported. The disc-shaped insulation cover is spliced ​​by a threaded short rod and a threaded sleeve. The first U-shaped clamp is connected to the disc-shaped insulation cover via a first pull ring and a threaded connecting tube. The second U-shaped clamp is connected to the second pull ring and the threaded connecting rod. There is no need for overall transportation, and high-altitude assembly is convenient, shortening the working time on the tower. 2. In the present invention, during field construction, after the transmission line passes through the wedge-shaped groove of the wedge-shaped tension clamp, the arc-shaped clamp rotates around the fixed coupling shaft, the limit pin slides along the elliptical pin hole, and the tension spring deforms to generate tension, driving the arc-shaped clamp to adaptively clamp against transmission lines of different diameters, thereby preventing loosening of the clamp due to diameter deviation of the transmission line and adapting to the installation of transmission lines of various specifications; 3. In the present invention, the operation of the transmission line is greatly affected by wind vibration and ice accumulation. After the arc-shaped clamping plate in the device initially clamps the transmission line, the U-shaped threaded rod is clamped into the arc-shaped clamping groove and fixed by the fixing plate and self-locking nut. The downward pressing swing arm of the T-shaped seat pressing mechanism rotates with the notch gear, and the arc-shaped notch fits the transmission line. The torque spring increases the force, and the double fixation prevents the transmission line from sliding and wearing. 4. In the present invention, when the disc-shaped insulating cover needs to be replaced due to aging, there is no need to disassemble the entire device. It is only necessary to remove the fasteners at the corresponding threaded short rod and threaded sleeve to replace it; when maintaining the transmission line, the self-locking nut is loosened and the U-shaped threaded rod is removed to adjust the clamping structure, thereby reducing power outage maintenance time and improving power supply reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 It is an exploded view of the overall structure of the present invention; Figure 4 This is a structural diagram of the wedge-shaped tension clamp of the present invention; Figure 5 This is a cross-sectional view of the wedge-shaped tension clamp structure of the present invention; Figure 6 This is a cutaway exploded view of the wedge-shaped tension clamp structure of the present invention; Figure 7 This is a cross-sectional exploded view of the wedge-shaped tension clamp and several pairs of arc-shaped clamping plates of the present invention; Figure 8 This is an exploded view of the U-shaped threaded rod and fixed connecting plate structure of the present invention; Figure 9 This is an exploded view of the T-shaped seat and a pair of downward pressure swing arms of the present invention; Figure 10 This is an exploded bottom view of the T-shaped seat and a pair of downward pressure swing arms structure of the present invention; Serial numbers in the figure: 100, wedge-shaped tension clamp; 101, end wedge-shaped groove; 102, front wedge-shaped groove; 103, fixing ring; 104, third bolt; 105, L-shaped hook; 106, U-shaped notch; 107, elliptical pin hole; 108, fixed coupling; 109, arc-shaped slot; 110, arc-shaped clamping plate; 111, limit pin; 112, tension spring; 200, first U-shaped clamp; 201, first bolt; 202, first pull ring; 203, threaded connection cylinder; 204, Disc-shaped insulating cover; 205, short threaded rod; 206, threaded sleeve; 207, second pull ring; 208, threaded connecting rod; 209, 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, torsion coupling; 306, notched gear; 307, downward pressure swing arm; 308, torque spring; 309, notch one; 310, notch two; 311, arc-shaped notch. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1: This example provides an assembled tension string device for overhead transmission lines, see 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 realizes the steering adaptation and connection of different components. The second U-shaped clamp 209 is connected 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 in a hinged manner. The disc-shaped insulating cover 204 is a core insulating component to prevent leakage of the transmission line. Several disc-shaped insulating covers 204 constitute the insulating support section of the device, and the first U-shaped clamp 200 is hinged. The wedge-shaped tension clamp 100 is installed at the corner of the wedge-shaped tension clamp 100. The core load-bearing component of the wedge-shaped tension clamp 100 provides a basic framework for clamping and fixing the transmission line and installing other components, realizing the tension fixing function of the transmission line as a whole. The wedge-shaped tension clamp 100 is respectively provided with a front wedge-shaped groove 102 and a terminal wedge-shaped groove 101 that are distributed in an L shape. The end of the wedge-shaped tension clamp 100 is fixed with an integrally formed L-shaped hook 105. The front wedge-shaped groove 102 and the terminal wedge-shaped groove 101 cooperate to form an L-shaped through-distribution for the transmission line to pass through, realizing the preliminary path planning and penetration positioning of the transmission line in the clamp body. The bottom wall of the front end wedge-shaped groove 102 is provided with a plurality of U-shaped notches 106 distributed at equal distances. The U-shaped notches 106 provide installation space for components such as the arc-shaped clamping plate 110 and the fixed coupling 108, and at the same time assist in the initial limitation of the transmission line. A pair of arc-shaped clamping plates 110 for clamping the transmission line are hingedly installed in the U-shaped notch 106. The arc-shaped clamping plates 110 realize the initial clamping and positioning of the transmission line, and can adaptively clamp transmission lines of different diameters in conjunction with the tension spring 112. The top surface of the wedge-shaped tension clamp 100 is provided with a plurality of U-shaped threaded rods 300 distributed at equal distances, and the bottom surface of the wedge-shaped tension clamp 100 is provided with a plurality of fixed coupling rods 300 distributed at equal distances. 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 by threaded cooperation with a pair of self-locking nuts 302, 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, and a fixing notch is opened on the top of the T-shaped seat 303 for fixing the U-shaped threaded rod 300. A downward pressing mechanism for fixing the transmission line is installed on the T-shaped seat 303. The T-shaped seat 303 provides an installation space and a fixing foundation for the downward pressing mechanism, and is positioned with the U-shaped threaded rod 300 to ensure that the downward pressing mechanism acts on the corresponding position of the transmission line.

[0019] In the specific implementation process, Figure 1 and Figure 3As shown, a pair of fixing rings 103 are symmetrically fixed at the corners of the wedge-shaped tension clamp 100, and a third bolt member 104 is installed between the pair of fixing rings 103 in a hinged manner. The first U-shaped clamp 200 is sleeved on the third bolt member 104 in a hinged manner. The third bolt member 104 includes a third bolt and a third nut and a third cotter pin used in conjunction with it. The fixing ring 103 provides a hinged installation point for the third bolt member 104, so that the wedge-shaped tension clamp 100 and the first U-shaped clamp are connected. 200 is a detachable hinged connection; a threaded short rod 205 and a threaded sleeve 206 are respectively fixed in the middle of the two side surfaces of the disc-shaped insulating cover 204, and the threaded short rod 205 is inserted into the threaded sleeve 206 on the adjacent disc-shaped insulating cover 204 through screw fit. The threaded short rod 205 realizes the assembly and fixation between the disc-shaped insulating covers 204 and with the first U-shaped clamp 200, and the threaded sleeve 206 provides a threaded interface for the assembly between the disc-shaped insulating covers 204 and with the second U-shaped clamp 209; A first bolt member 201 is installed in the opening of the first U-shaped clamp 200 in a hinged manner. The first bolt member 201 includes a first bolt and a first nut and a first cotter pin used in conjunction therewith. The first bolt member 201 provides a hinged installation basis for the first pull ring 202, thereby realizing a detachable connection between the first pull ring 202 and the first U-shaped clamp 200. The first pull ring 202 is installed on the first bolt member 201 in a hinged manner. The first pull ring 202 is used for the connection transition between the first U-shaped clamp 200 and the adjacent disc-shaped insulating cover 204, and has a certain degree of steering flexibility. A threaded connection 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 inserted into the threaded connection cylinder 203 and fixed through threaded cooperation, thereby realizing a detachable fixation between the first U-shaped clamp 200 and the disc-shaped insulating cover 204. A second bolt member 210 is installed in the opening of the second U-shaped clamp 209 in a hinged manner. The second bolt member 210 includes a second bolt and a second nut and a second cotter pin used in conjunction with it. The second bolt member 210 provides a hinged installation point for the second pull ring 207 to achieve a detachable connection between the second pull ring 207 and the second U-shaped clamp 209. The second pull ring 207 is installed on the second bolt member 210 in a hinged manner. The second pull ring 207 realizes the connection transition between the second U-shaped clamp 209 and the adjacent disc-shaped insulating cover 204, and has steering adaptability. A threaded connecting rod 208 is fixed on the second pull ring 207, and 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 through screw fitting, so as to realize the detachable fixation of the second U-shaped clamp 209 and the disc-shaped insulating cover 204; a plurality of threaded short rods 205 and the threaded connecting rod 208 are provided with a matching fourth nut and a fourth cotter pin, and the fourth nut and the fourth cotter pin provide secondary reinforcement for the threaded connection part to prevent the thread from loosening, thereby ensuring the overall stability of the connection of the plurality of disc-shaped insulating covers 204.

[0020] It should be noted that: in this embodiment, if Figure 6 and Figure 8 As shown, a plurality of pairs of arc-shaped slots 109 for accommodating the U-shaped threaded rod 300 are provided on the top surface of the wedge-shaped tension clamp 100. The arc-shaped slots 109 are used to accommodate the U-shaped threaded rod 300 to ensure that the installation position of the U-shaped threaded rod 300 is accurate and to prevent lateral displacement. An arc-shaped groove for fixing the wedge-shaped tension clamp 100 is provided in the middle of the fixed connecting plate 301, and a pair of semicircular notches for the U-shaped threaded rod 300 to pass through are provided at both ends of the fixed connecting plate 301.

[0021] The working principle of this embodiment is as follows: First, a plurality of disc-shaped insulating covers 204 are assembled: a plurality of disc-shaped insulating covers 204 are sequentially installed between a first U-shaped clamp 200 and a second U-shaped clamp 209; adjacent disc-shaped insulating covers 204 are screwed together with their own matching threaded short rods 205 and threaded sleeves 206 to achieve threaded locking and fixation of adjacent components; wherein, the first U-shaped clamp 200 is connected to the first pull ring 202 via a first bolt member 201 hingedly installed in its opening, and the threaded connecting tube 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, completing the connection between the first U-shaped clamp 200 and the plurality of disc-shaped insulating covers 204; The second U-shaped clamp 209 is connected to the second pull ring 207 through the second bolt member 210 hingedly installed in its opening, and the threaded connecting rod 208 fixed on the second pull ring 207 is screwed and locked with the threaded sleeve 206 of the adjacent disc-shaped insulating cover 204 to complete the connection between the second U-shaped clamp 209 and the several disc-shaped insulating covers 204; at the same time, all the threaded short rods 205 and the threaded connecting rods 208 are further reinforced by the matching fourth nuts and fourth cotter pins to ensure the overall stability of the insulation assembly connection. Subsequently, the wedge-shaped tension clamp 100 and the first U-shaped clamp 200 are hingedly installed: a pair of fixing rings 103 symmetrically fixed at the corners of the wedge-shaped tension clamp 100 are used to hingely install the third bolt member 104 between the two fixing rings 103, and the first U-shaped clamp 200 is hingedly sleeved on the third bolt member 104 to achieve the connection between the wedge-shaped tension clamp 100 and the several disc-shaped insulating covers 204; Then the transmission line is preliminarily installed and positioned: the transmission line to be fixed is passed through the front end wedge groove 102 and the end wedge groove 101 which are L-shaped and through-distributed on the wedge-shaped tension clamp 100 in turn, to complete the preliminary installation of the transmission line; in this process, in the several equally distributed U-shaped notches 106 on the inner bottom wall of the front end wedge groove 102, each pair of arc-shaped clamps 110 installed by hinged manner will form a preliminary clamping for the passed transmission line, so as to realize the preliminary positioning and fixation of the transmission line in the wedge-shaped tension clamp 100; finally, the transmission line is secondary reinforced and locked: several U-shaped threaded rods 300 are sequentially mounted on the top surface of the wedge-shaped tension clamp 100, and the U-shaped threaded rods 300 need to be engaged with several pairs of arc-shaped slots correspondingly opened on the top surface of the wedge-shaped tension clamp 100. 109, ensure that the U-shaped threaded rod 300 is installed in an accurate position; then, the two ends of the U-shaped threaded rod 300 are passed through the semicircular notches at both ends of several equally distributed fixed connecting plates 301 fixed on the bottom surface of the wedge-shaped tension clamp 100, and are locked and fixed by means of self-locking nuts 302 that threadably cooperate with the U-shaped threaded rod 300, thereby completing the installation of the U-shaped threaded rod 300 on the wedge-shaped tension clamp 100; at the same time, a downward pressure mechanism installed on the T-shaped seat 303 fixed in the middle of the U-shaped threaded rod 300 is used to apply downward pressure to the initially clamped transmission line, so as to achieve re-clamping and fixation of the transmission line in the wedge-shaped tension clamp 100, and finally a double clamping structure with initial clamping by the arc-shaped clamping plate 110 and secondary fixation by the downward pressure mechanism is used to ensure that the transmission line is installed firmly and the force is stable.

[0022] 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 the arc-shaped clamping plate 110 in Example 1, such as poor adaptability to transmission lines of different diameters and insufficient clamping tension, thereby achieving more stable adaptive clamping of the transmission line. It also includes: In the specific implementation process, Figure 6 and Figure 7 As shown, a fixed coupling 108 is fixedly provided at the bottom of the U-shaped notch 106. The fixed coupling 108 provides a differentiated hinged installation basis for the arc-shaped splint 110, so that the arc-shaped splint 110 can rotate adaptively around it. A first notch is provided at the middle position of the bottom of one arc-shaped splint 110 and is hingedly mounted on both sides of the fixed coupling 108. A second notch is provided at both sides of the bottom of the other arc-shaped splint 110 and is hingedly mounted in the middle of the fixed coupling 108. Two pairs of elliptical pin holes 107 are provided on the two side walls of the U-shaped notch 106. The elliptical pin holes 107 are used for sliding insertion of limit pins 111 to limit the rotation trajectory of the arc splint 110 and prevent it from deflecting. A pair of limit pins 111 are fixed on the outer side of the arc splint 110. The limit pins 111 limit the rotation range and trajectory of the arc splint 110 and provide installation and fixing points for the tension spring 112. The outer end of each limit pin 111 is slidably inserted in the elliptical pin hole 107, and the inner end of each limit pin 111 is sleeved with a tension spring 112. The two ends of the tension spring 112 are respectively fixedly connected to the arc splint 110 and the inner wall of the U-shaped notch 106. The tension spring 112 is elastically deformed by the rotation of the arc splint 110, releasing continuous tension, driving the arc splint 110 to adaptively press against the transmission line, thereby enhancing the initial clamping stability.

[0023] The working principle of this embodiment is as follows: when the transmission line is passed through the front wedge-shaped groove 102 of the wedge-shaped tension clamp 100, the transmission line is clamped downward between several pairs of arc-shaped clamping plates 110 in the U-shaped notch 106 on the bottom wall of the front wedge-shaped groove 102; because 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 extrusion force of the transmission line will drive the pair of arc-shaped clamping plates 110 to adaptively rotate around the fixed coupling 108; during this process, a pair of limit pins 111 fixed on the outer side of the arc-shaped clamping plates 110 will synchronously slide along the two pairs of through elliptical pin holes 107 opened on both side walls of the U-shaped notch 106, ensuring that the rotation trajectory of the arc-shaped clamping plates 110 is stable and does not deviate; At the same time, the tension spring 112 sleeved on the end of each limiting pin shaft 111 will produce elastic deformation due to the rotation of the arc-shaped clamping plate 110, and then release continuous tension. The tension reacts on the arc-shaped clamping plate 110, driving several pairs of arc-shaped clamping plates 110 to adaptively press against each other on the surface of the transmission line, and finally achieves stable clamping of transmission lines of different diameters, avoiding displacement of the transmission line due to loose clamping.

[0024] Example 3: Based on Example 2, this example solves the problems of Example 2 in that the structure of the pressing mechanism is unclear and the secondary clamping force of the power transmission line is poorly adjustable by disposing a pressing mechanism composed of a torsion coupling 305, a meshing notched gear 306, a pressing 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 a more controllable and stable secondary pressurization fixation of the power transmission line. It also includes: In the specific implementation process, 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 a mounting cavity for the pressing mechanism components such as the torque coupling 305 and the notched gear 306, thereby limiting the mounting position and range of motion of the pressing mechanism components. A pair of torque couplings 305 are hingedly mounted in the trapezoidal slot 304. The torque couplings 305 provide a rotating axis for the notched gear 306 and the pressing swing arm 307 to transmit 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, converting the opening action of the downward pressure swing arm 307 into synchronous reverse rotation, ensuring the coordinated action of the pair of downward pressure swing arms 307, the notched portion of the notched gear 306 on the same side is fixed with the downward pressure swing arm 307, and the bottom of the downward pressure swing arm 307 is provided with an arc-shaped notch 311 for fixing the transmission line, and the arc-shaped notch 311 fits the surface of the transmission line, increasing the contact area with the transmission line, avoiding damage to the transmission line due to excessive local pressure, and improving the stability of the secondary clamping; A pair of notches 310 are provided on both sides of the trapezoidal slot 304, a notch 309 is provided on the downward pressure swing arm 307, and a torque spring 308 is sleeved on the middle part of the torsion coupling 305. The torque spring 308 is elastically deformed by the rotation of the torsion coupling 305, releasing reverse torque force to provide continuous clamping force for the downward pressure swing arm 307. The two ends of the torque spring 308 extend outward and are respectively clamped in the notch 1 309 and the notch 2 310 on the same side. The notch 1 309 and the notch 2 310 provide deformation support for the torque spring 308.

[0025] 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 begins: a plurality of U-shaped threaded rods 300 are sequentially sleeved on the top surface of the wedge-shaped tension clamp 100 according to the preset positions and engaged in the corresponding arc-shaped slots 109. The two ends of the U-shaped threaded rod 300 are passed through the fixed connecting 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. 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 in an articulated manner, and the notched gears 306 fixed on both sides of each torsion coupling 305 are meshed with each other; when the T-shaped seat 303 moves downward and approaches the transmission line, the transmission line will generate an upward thrust on the pressing swing arm 307, driving the pressing swing arm 307 to hinge and 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 provided at the bottom of the pair of pressing swing arms 307 gradually fit the surface of the transmission line and eventually press downward against the outside of the transmission line; At the same time, the torque spring 308 mounted on the middle part of the torsion coupling 305 will undergo elastic deformation due to the rotation of the torsion coupling 305, generating a reverse torque force; this torque force continuously acts on the downward pressure swing arm 307, further increasing the clamping force applied to the power transmission line by the downward pressure swing arm 307 through the arc-shaped notch 311, and finally, under the dual effects of the initial clamping of the arc-shaped clamping plate 110 and the torque pressure fixation of the downward pressure mechanism, it is ensured that the power transmission line is firmly installed and evenly stressed.

[0026] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An assembled tension string device for an overhead transmission line, 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 hingedly installed between the first U-shaped clamp (200) and the second U-shaped clamp (209), and the first U-shaped clamp (200) is hingedly installed at the corner of the wedge-shaped tension clamp (100); a front wedge-shaped groove (102) and a rear wedge-shaped groove (101) are provided on the wedge-shaped tension clamp (100), and an L-shaped hook (105) is fixed to the rear end of the wedge-shaped tension clamp (100); a plurality of U-shaped notches (106) are provided on the inner bottom wall of the front wedge-shaped groove (102), A pair of arc-shaped clamping plates (110) are hingedly installed in the U-shaped notch (106), a plurality of U-shaped threaded rods (300) are sleeved on the wedge-shaped tension clamp (100), a plurality of 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 thread-locked with a pair of self-locking nuts (302), a T-shaped seat (303) is fixed in the middle of the U-shaped threaded rod (300), and a downward pressing mechanism is installed on the T-shaped seat (303).

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

3. The assembled tension string device for overhead power transmission lines according to claim 2, characterized in that: Threaded short rods (205) and threaded sleeves (206) are fixedly provided on two side surfaces of the disc-shaped insulating cover (204), and the threaded short rods (205) are screwed into the threaded sleeves (206) on the adjacent disc-shaped insulating cover (204).

4. The assembled tension string device for overhead power transmission lines according to claim 3, characterized in that: A first bolt member (201) is hingedly installed in the opening of the first U-shaped clamp (200), a first pull ring (202) is hingedly installed on the first bolt member (201), a threaded connection tube (203) is fixedly provided on the first pull ring (202), and a threaded short rod (205) on a disc-shaped insulating cover (204) adjacent to the first U-shaped clamp (200) is screwed into the threaded connection tube (203).

5. The assembled tension string device for overhead power transmission lines according to claim 3, characterized in that: A second bolt member (210) is hingedly mounted in the opening of the second U-shaped clamp (209), a second pull ring (207) is hingedly mounted on the second bolt member (210), a threaded connecting rod (208) is fixedly mounted on the second pull ring (207), and the threaded connecting rod (208) is screwed into a threaded sleeve (206) on a disc-shaped insulating cover (204) adjacent to the second U-shaped clamp (209).

6. The assembled tension string device for overhead power transmission lines according to claim 1, characterized in that: A fixed coupling (108) is fixedly provided at the bottom of the U-shaped notch (106), wherein a first notch is provided at the middle position of the bottom of one arc-shaped splint (110) and is hingedly mounted on both sides of the fixed coupling (108), and a second notch is provided at both sides of the bottom of the other arc-shaped splint (110) and is hingedly mounted on the middle of the fixed coupling (108).

7. The assembled tension string device for overhead power transmission lines according to claim 6, characterized in that: Two pairs of elliptical pin holes (107) are provided on both side walls of the U-shaped notch (106), and a pair of limiting pins (111) are fixedly provided on the outer side surface of the arc-shaped splint (110), the outer end of the limiting pin (111) is slidably inserted into the elliptical pin hole (107), and the inner end of the limiting pin (111) is sleeved with a tension spring (112), and the two ends of the tension spring (112) are fixedly connected to the arc-shaped splint (110) and the inner wall of the U-shaped notch (106).

8. The assembled tension string device for overhead power transmission lines according to claim 1, characterized in that: The wedge-shaped tension clamp (100) is provided with a plurality of pairs of arc-shaped slots (109), the middle portion of the fixed connecting plate (301) is provided with an arc-shaped slot, and both ends of the fixed connecting plate (301) are provided with a pair of semicircular notches.

9. The assembled tension string device for overhead power transmission lines according to claim 1, characterized in that: The downward pressing mechanism comprises a notched gear (306) and a downward 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 hingedly mounted in the trapezoidal slot (304). A pair of notched gears (306) are fixedly mounted on both sides of the torsion coupling (305), and adjacent pairs of notched gears (306) are meshed and connected. The notched portion of the notched gears (306) on the same side is fixedly provided with a downward pressing swing arm (307). The bottom of the downward pressing swing arm (307) is provided with an arc-shaped notch (311).

10. The assembled tension string device for overhead power transmission lines according to claim 9, characterized in that: A pair of notches (310) are provided on both sides of the trapezoidal slot (304), a notch (309) is provided on the downward pressure swing arm (307), a torque spring (308) is sleeved on the middle part of the torsion coupling (305), and both ends of the torque spring (308) extend outward and are clamped in the notch (309) and the notch (310) on the same side.

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