Double-top double-hoop for overhead transmission line

Abstract

The invention relates to a double-top double-hoop for an overhead transmission line, and relates to the technical field of hoops, the double-top double-hoop comprises two fixing plates, one side of each fixing plate is fixedly provided with two arc-shaped hoop bodies side by side, the two ends of each arc-shaped hoop body are fixedly provided with joining plates, and the joining plates are provided with joining through holes; the arc-shaped hoop bodies on the two fixing plates can be arranged on the periphery of the wire rod in a surrounding mode, and at the moment, the opposite connecting through holes in the two fixing plates coincide. A supporting plate is vertically installed on the side face, away from the arc-shaped hoop body, of the fixing plate, an installation through hole is formed in the supporting plate, limiting protruding plates are fixedly arranged on the two opposite edges of the supporting plate, and the supporting plate and the two limiting protruding plates jointly define a positioning notch allowing the end of a cross arm to be clamped in. According to the invention, the efficiency of aloft work in the nuclear power line is improved, it is ensured that the cross arm can be accurately installed in place, and a stable and reliable foundation is provided for installation of electric power equipment, communication equipment and the like in the subsequent nuclear power line.

Description

Technical Field

[0001] The present application relates to the technical field of clamps, and in particular to a double-top double clamp for overhead transmission lines. Background Art

[0002] Nuclear power transmission systems place stringent demands on the stability and safety of transformer support structures. These structures must withstand extreme operating conditions (such as strong earthquakes, intense radiation, and high corrosion) and ensure reliability throughout the equipment's lifecycle. The double-top, double-clamp system, a core connector, utilizes an innovative double-layer locking structure and highly weather-resistant materials to rigidly anchor the pole to the supporting crossarm. This system not only meets the mechanical requirements for vibration and impact resistance of nuclear-grade equipment, but also meets the corrosion and aging resistance standards of complex nuclear power environments. It provides a stable support platform for the transformer and serves as a key technical support for the "pole-clamp-arm" trinity safety system in nuclear power lines.

[0003] In existing technology, the typical double-hoop structure adopts a split design. Its core components include two fixing plates and two sets of curved hoop bodies, one above the other, secured to the same fixing plate. Pre-set fixing holes are provided at each end of the curved hoop bodies. During installation, the two sets of hoop bodies are interlocked to form a ring-shaped wrapping structure. Bolts are inserted through the overlapping fixing holes at the ends of the hoop bodies to achieve fastening, ultimately locking the entire hoop to the outer wall of the pole. This structure then aligns the reserved mounting holes in the fixing plates with the through-holes at the ends of the crossarms, and screws are used to secure the crossarms axially. This provides a stable load-bearing platform for pole-mounted electrical equipment (such as disconnectors and lightning arresters) involved in nuclear power transmission lines.

[0004] However, this technical solution faces significant efficiency bottlenecks in actual aerial work. The initial crossarm positioning phase requires manual visual alignment of the mounting holes between the fixing plate and the crossarm. However, due to the limitations of the aerial operating platform (such as swaying and confined space) and visual errors, the crossarm end holes often exhibit axial or angular misalignment with the mounting plate holes. Operators must repeatedly adjust the crossarm's position and re-attempt to align the holes, increasing the time required for a single installation by 30%-50%. This results in low efficiency and leaves room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a double-top double clamp for overhead transmission lines, which solves the problem in the above-mentioned related technologies that when fixing the end of the crossarm on the clamp, it is restricted by the limitations of the high-altitude operating platform (such as shaking, narrow space) and the visual errors of personnel, which may require multiple alignment of the crossarm and affect the installation efficiency.

[0006] The double-top double-hoop for overhead transmission lines provided in this application adopts the following technical solution: A double-top double-hoop for an overhead transmission line, comprising two fixed plates, two arc-shaped hoop bodies fixed side by side on one side of each of the fixed plates, connecting plates fixed at both ends of the arc-shaped hoop bodies, connecting through holes provided on the connecting plates; the arc-shaped hoop bodies on the two fixed plates can be arranged around the outer periphery of the wire rod, and at this time, the opposite connecting through holes on the two fixed plates coincide; a support plate is vertically mounted on the side of the fixed plate away from the arc-shaped hoop body, the support plate is provided with a mounting through hole, and limiting convex plates are fixed on the opposite edges of the support plate, and the support plate and the two limiting convex plates together surround a positioning notch for the cross arm end to be snapped into.

[0007] By adopting this technical solution, a support plate is vertically installed on the side of the fixed plate away from the curved hoop. The support plate and two limiting protrusions form a positioning notch. When installing the crossarm, simply snap the crossarm end directly into the positioning notch, eliminating the need for tedious manual visual alignment operations and quickly completing the initial positioning of the crossarm. This design effectively circumvents the limitations of high-altitude operations and the problems caused by visual errors, avoiding multiple alignments of the crossarm, significantly reducing installation time, and improving the efficiency of high-altitude operations in nuclear power lines. It ensures that the crossarm can be accurately installed and provides a stable and reliable foundation for the subsequent installation of power, communication, and other equipment in the nuclear power line.

[0008] Optionally, the side of the fixing plate away from the arc-shaped hoop body is rotatably connected to one side of the support plate, and the support plate can be rotated to a state parallel and perpendicular to the fixing plate; an oblique support block is fixed on the side of the support plate away from the limiting protrusion, and one side of the oblique support block abuts against the side of the fixing plate when the support plate is perpendicular to the fixing plate, and an adjustment member for fixing the rotation angle of the support plate is installed on the fixing plate.

[0009] By adopting this technical solution, the support plate can be rotated parallel to the fixed plate during transportation and storage, significantly reducing the overall size of the clamp, reducing packaging space requirements, and reducing transportation costs. During installation, the support plate is rotated perpendicular to the fixed plate. The positioning notch formed by the support plate and the retaining plate precisely receives the end of the crossarm, allowing for quick positioning and installation. Furthermore, when the support plate is in the vertical position, the diagonal brace blocks abut against the sides of the fixed plate, forming an auxiliary support structure and enhancing the load-bearing stability of the crossarm.

[0010] Optionally, the adjusting member includes an adjusting plate slidably arranged on the side of the fixed plate away from the arc-shaped hoop body, and the adjusting plate can slide back and forth in the direction close to the support plate; the side of the adjusting plate facing the support plate is provided with a limiting notch for a limiting protrusion to be embedded in, and the edge of the limiting protrusion can be embedded in the limiting notch as the adjusting plate slides when the support plate is in a horizontal or vertical state.

[0011] By adopting this technical solution, once the support plate is rotated to the desired position (horizontal or vertical), the adjustment plate is slid so that the edge of the retaining protrusion fits into the retaining notch, quickly securing the support plate. This allows for convenient operation and precise positioning. This design eliminates the need for complex tools and cumbersome procedures, effectively improving installation efficiency. Furthermore, the tight fit between the retaining protrusion and the retaining notch provides a secure support for the support plate, preventing it from accidentally rotating or loosening when bearing the weight of the crossarm or subjected to external forces, thus ensuring the stability and safety of the crossarm installation.

[0012] Optionally, a first inclined surface is provided on the opening edge of the limiting notch.

[0013] By adopting this technical solution, when the support plate is rotated to a horizontal or vertical position, the first inclined surface acts as a guide and transition when the adjustment plate is pushed to insert the limiting protrusion into the limiting notch. The edge of the limiting protrusion does not need to be precisely aligned with the edge of the limiting notch; as the adjustment plate slides, its edge simply contacts the first inclined surface, allowing it to slide naturally and smoothly into the limiting notch along the slope. This significantly reduces the requirements for manual stability and precision during installation, reduces repeated adjustments caused by operator errors, and improves installation efficiency.

[0014] Optionally, bending plates facing the fixed plate are fixed on the opposite side surfaces of the adjustment plate, and the opposite side surfaces of the fixed plate abut against the sides of the two bending plates close to each other; guide protrusions are fixed on the sides of the two bending plates close to each other, and guide grooves for inserting and sliding the guide protrusions are provided on the opposite side surfaces of the fixed plate.

[0015] By adopting this technical solution, the cooperation between the guide protrusion and the guide slot further enhances the sliding guidance function of the adjustment plate. The guide protrusion slides smoothly within the guide slot, not only providing a reliable sliding track for the adjustment plate to avoid sliding jams or blockages, but also accurately constraining the sliding travel of the adjustment plate, ensuring that its sliding distance and position meet the design requirements.

[0016] Optionally, elastic clamping parts are provided on the side surfaces of the two guide protrusions that are close to each other, and a plurality of positioning grooves for the elastic clamping parts to be clamped into are opened on the inner wall of the guide slot.

[0017] By adopting this technical solution, when the adjustment plate slides to a specific position, such as when the support plate is horizontal or vertical, the elastic clips precisely snap into the corresponding positioning grooves, emitting a distinct "click" sound and tactile feedback. This allows operators to confirm that the adjustment is in place without additional measurement or observation, preventing excessive or insufficient sliding and significantly improving installation efficiency and accuracy. Furthermore, the snap-in fixation of the elastic clips effectively prevents accidental sliding of the adjustment plate due to factors such as vibration and external forces during equipment operation, ensuring that the support plate remains stable in the desired state, providing continuous and reliable support for the crossarms and electrical equipment, and reducing the risk of safety accidents caused by loose support plates.

[0018] Optionally, a locking rod is slidably provided on the side of the fixed plate, and the locking rod is perpendicular to the sliding direction of the adjustment plate. A locking through hole is provided on the connecting plate for the end of the locking rod to slide into; the locking rod can simultaneously pass through two overlapping locking through holes when the connecting plates abut, and a control member that drives the locking rod to insert into the locking through hole and an elastic reset member that drives the locking rod to disengage from the locking through hole are installed on the side of the fixed plate.

[0019] By adopting the above technical solution, when the connecting plates on the two fixing plates are in contact, the locking rod can be accurately inserted into the overlapping locking holes to form a secondary locking structure, which effectively enhances the overall anti-loosening ability of the clamp and greatly reduces the risk of the connecting plate loosening due to long-term use, external force impact or vibration, etc., ensuring that the connection between the clamp and the pole is always stable. The setting of the control part enables the operator to easily trigger the insertion action of the locking rod. After the initial fixation of the clamp is completed, the secondary locking can be achieved through simple operation without the need for additional tools, thereby improving installation efficiency. The elastic reset part can automatically drive the locking rod out of the locking hole when disassembly or adjustment is required, restoring the adjustable state of the clamp and achieving quick unlocking.

[0020] Optionally, the elastic return member includes a first spring, a baffle fixed on the outer periphery of the locking rod, and a guide block fixed on the fixed plate, the guide block is provided with a guide hole for the locking rod to pass through, the baffle is located on the side of the guide block away from the connecting plate, and the two ends of the first spring are respectively fixedly connected to the sides of the guide block and the baffle close to each other.

[0021] By adopting this technical solution, the guide hole on the guide block precisely guides the sliding direction of the locking rod, preventing it from deflecting or shaking, ensuring that the locking rod can accurately insert and exit the locking hole, maintaining the high-precision fit of the clamp structure. The baffle cooperates with the first spring. When the locking rod is inserted into the locking hole, the first spring is compressed and stores energy. When unlocking is required, the first spring releases its elastic potential energy, driving the locking rod to automatically disengage through the baffle. No manual operation is required, and the unlocking process is quick and smooth.

[0022] Optionally, the control member includes a control protrusion fixed on the bending plate, and a guide slope is provided on the end edge of the locking rod away from the connecting plate; the control protrusion can squeeze the locking rod along the guide slope, causing the locking rod to slide toward the connecting plate.

[0023] By adopting the above technical solution, when the operator pushes the adjustment plate to complete the fixing of the support plate angle, the control protrusion on the bending plate slides along the guide slope at the end of the locking rod, and uses the slope of the slope to generate a horizontal component of force on the locking rod, automatically squeezing and pushing the locking rod to slide toward the connecting plate and accurately insert it into the locking through hole. No additional manual operation of the locking rod is required throughout the process, which greatly simplifies the installation process, reduces the steps and tool use in high-altitude operations, reduces the risk of operational errors, and improves construction efficiency and safety.

[0024] Optionally, the limiting protrusion is provided with a second inclined surface on the opening edge of the positioning notch.

[0025] By adopting this technical solution, during installation, when the adjustment plate slides to bring the stopper plate closer to the positioning notch, the second bevel plays a crucial guiding role. Like a "guide ramp," it eliminates the need for precise operator alignment; the stopper plate's edge only needs slight contact with the second bevel, allowing it to slide naturally and smoothly into the positioning notch, following the slope. This significantly reduces installation difficulty and time costs, improving construction efficiency and making it particularly suitable for use in environments with limited operating space, such as those involving aerial work.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Install the support plate vertically on the side of the fixed plate away from the curved hoop. The support plate and two limiting protrusions form a positioning notch. When installing the crossarm, simply snap the crossarm end directly into the positioning notch, eliminating the need for tedious manual visual alignment and quickly completing the initial positioning of the crossarm. This improves the efficiency of high-altitude operations in nuclear power lines, ensures that the crossarm can be accurately installed, and provides a stable and reliable foundation for the subsequent installation of power, communication, and other equipment in the nuclear power line.

[0027] 2. During transportation and storage, the support plate can be rotated parallel to the fixed plate, significantly reducing the overall size of the clamp, reducing packaging space requirements, and reducing transportation costs. During installation, the support plate is rotated perpendicular to the fixed plate. The positioning notch formed by the support plate and the stopper plate precisely receives the end of the crossarm, allowing for quick positioning and installation. Furthermore, when the support plate is vertical, the diagonal brace blocks abut against the sides of the fixed plate, forming a supplementary support structure and enhancing the load-bearing stability of the crossarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 This is a schematic diagram of the exploded structure of the embodiment of the present application showing the installation distribution of the arc-shaped hoop and the fixing plate; Figure 3 This is a schematic diagram of the partial structure of an embodiment of the present application when the support plate is in a horizontal state; Figure 4 This is a schematic diagram of the partial structure of an embodiment of the present application when the support plate is in a vertically upward state; Figure 5 yes Figure 4 A magnified schematic diagram of part A; Figure 6 This is a partial cross-sectional structural diagram of the embodiment of the present application embodying the installation and coordination of the adjustment plate; Figure 7 1 is a partial cross-sectional structural diagram of the locking rod installation and cooperation embodiment of the present application; Figure 8 This is a partial cross-sectional structural diagram of the embodiment of the present application showing the installation and cooperation of the elastic reset member; Figure 9 yes Figure 8 Schematic diagram of the enlarged portion B.

[0030] In the figure, 1. fixing plate; 11. guide slide groove; 111. positioning groove; 2. arc-shaped hoop; 3. connecting plate; 31. connecting through hole; 32. locking through hole; 4. supporting plate; 41. limiting convex plate; 411. positioning notch; 412. second inclined surface; 42. diagonal support block; 43. mounting through hole; 5. adjusting member; 51. adjusting plate; 511. limiting notch; 512. first inclined surface; 52. bending plate; 53. guide convex block; 531. placement groove; 54. elastic clip; 541. compression spring; 542. arc-shaped convex block; 6. locking rod; 61. guide inclined surface; 7. control member; 71. control convex block; 8. elastic reset member; 81. first spring; 82. baffle; 83. guide block. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0032] Example: Reference Figure 1 and Figure 2 A double-top double-hoop for an overhead transmission line, comprising two fixing plates 1, wherein two arc-shaped hoop bodies 2 are welded and fixed side by side on one side of each fixing plate 1, and connecting plates 3 are integrally formed at both ends of the arc-shaped hoop body 2, and connecting through holes 31 are opened on the connecting plates 3; When the double-top double clamp is used, the arc-shaped clamp body 2 on the two fixing plates 1 can be arranged around the outer periphery of the wire rod. At this time, the relative connecting through holes 31 on the two fixing plates 1 overlap, and then bolts are used to pass through the overlapping connecting through holes 31 to tighten the two abutting connecting plates 3 to achieve the installation and fixation of the clamp.

[0033] Reference Figure 2 and Figure 3 A support plate 4 is vertically mounted on the side of the fixing plate 1 away from the arc-shaped hoop body 2, wherein the support plate 4 is provided with a mounting through hole 43, and limiting protrusions 41 are integrally formed on two opposite edges of the support plate 4. The support plate 4 and the two limiting protrusions 41 together enclose a positioning notch 411 for the end of the cross arm to be inserted into, and the limiting protrusion 41 is provided with a second inclined surface 412 on the opening edge of the positioning notch 411; When installing the crossarm end, the crossarm end is inserted into the positioning notch 411, and then bolts are used to pass through the through hole on the crossarm and the installation through hole 43 on the support plate 4, so as to achieve precise installation of the crossarm end and reduce the possibility of the aligned crossarm being deflected again.

[0034] Reference Figure 3 and Figure 4 The side of the fixed plate 1 away from the arc-shaped hoop body 2 is rotatably connected to one side of the support plate 4, and the support plate 4 can be rotated to a state parallel to and perpendicular to the fixed plate 1; an adjusting member 5 for fixing the rotation angle (horizontal and vertical states) of the support plate 4 is installed on the fixed plate 1; Two diagonal support blocks 42 are welded and fixed on the side of the support plate 4 away from the limiting protrusion 41; when the support plate 4 is perpendicular to the fixed plate 1, one side of the diagonal support block 42 abuts against the side of the fixed plate 1 to provide auxiliary support for the support plate 4 in a horizontal state.

[0035] Reference Figure 3 、 Figure 4 and Figure 5 The adjusting member 5 includes an adjusting plate 51 slidably arranged on the side of the fixing plate 1 away from the arc-shaped hoop body 2, and the adjusting plate 51 can slide back and forth in the direction close to the support plate 4; a limiting notch 511 for the limiting convex plate 41 to be inserted into the limiting notch 511 is provided on the side of the adjusting plate 51 facing the support plate 4, and a first inclined surface 512 is provided on the opening edge of the limiting notch 511; When the support plate 4 is in a horizontal or vertical state, the edges (at different locations) of the limiting protrusion 41 can be embedded into the limiting notch 511 along the first inclined surface 512 as the adjustment plate 51 slides, thereby limiting and fixing the support plate 4 in the horizontal and vertical states; when the support plate 4 is in a vertical state, the overall size of the clamp structure is reduced, which is convenient for packaging and transportation and reduces transportation costs.

[0036] Reference Figure 4 The adjusting plate 51 has two opposite sides with a bent plate 52 integrally formed thereon facing the fixed plate 1, and the two opposite side surfaces of the fixed plate 1 abut against the sides of the two bent plates 52 close to each other; the two sides of the two bent plates 52 close to each other are fixed with guide protrusions 53, and the two opposite side surfaces of the fixed plate 1 are provided with guide grooves 11 for the guide protrusions 53 to be inserted and slided.

[0037] Reference Figure 6 An elastic clamping member 54 is provided on the side of the two guide protrusions 53 that are close to each other. The elastic clamping member 54 includes a compression spring 541 and an arc-shaped protrusion 542. A placement groove 531 is provided on the guide protrusion 53 for the compression spring 541 and the arc-shaped protrusion 542 to be placed. The compression spring 541 presses one side of the arc-shaped protrusion 542, causing a portion of the arc-shaped protrusion 542 to protrude from the opening of the placement groove 531. The protruding portion of the arc-shaped protrusion 542 is an arc surface, and the arc length corresponding to the arc surface is the minor arc. Two positioning grooves 111 are provided on the inner wall of the guide groove 11 for the elastic clip 54 to be snapped into; when the elastic clip 54 is snapped into the two positioning grooves 111 respectively, it corresponds to the horizontal and vertical states of the support plate 4, thereby locking the adjustment plate 51 after the sliding adjustment is completed.

[0038] Reference Figure 7 and Figure 8 A locking rod 6 is slidably provided on one side of the fixed plate 1, wherein the locking rod 6 is perpendicular to the sliding direction of the adjustment plate 51, and a locking through-hole 32 is provided on the connecting plate 3 for the end of the locking rod 6 to slide into; when the two opposite connecting plates 3 abut, the locking rod 6 can simultaneously pass through the two overlapping locking through-holes 32, and a control member 7 for driving the locking rod 6 to insert into the locking through-hole 32 and an elastic reset member 8 for driving the locking rod 6 to disengage from the locking through-hole 32 are installed on the side of the fixed plate 1; After the clamp is bolted through the connecting hole 31, the control member 7 can be used to drive the locking rod 6 to slide so that the locking rod 6 simultaneously passes through the two overlapping locking holes 32, thereby further fixing and limiting the clamp structure and improving the assembly stability of the clamp structure.

[0039] Reference Figure 8 and Figure 9The elastic return member 8 includes a first spring 81 in a compressed state, a baffle 82 fixed to the outer periphery of the locking rod 6, and a guide block 83 fixed to the fixed plate 1, wherein the guide block 83 is provided with a guide hole for the locking rod 6 to pass through, the baffle 82 is located on the side of the guide block 83 away from the connecting plate 3, and the two ends of the first spring 81 are respectively fixedly connected to the side surfaces of the guide block 83 and the baffle 82 close to each other; The control member 7 includes a control protrusion 71 fixed on the bending plate 52, and a guide slope 61 is provided on the end edge of the locking rod 6 away from the connecting plate 3; when the control protrusion 71 moves downward with the adjustment plate 51, it can squeeze the locking rod 6 along the guide slope 61, so that the locking rod 6 slides in the direction close to the connecting plate 3; at this time, the adjustment plate 51 locks the support plate 4 in a horizontal state, and the locking rod 6 passes through the two overlapping locking through holes 32.

[0040] The implementation principle of the embodiment of this application is: During installation, the arc-shaped hoop bodies 2 on the two fixing plates 1 are arranged around the outer periphery of the wire rod, and the hoop is initially fixed by passing bolts through the overlapping connecting holes 31; the support plate 4 is rotated to a horizontal state, and the adjustment plate 51 slides so that the limiting protrusion 41 is embedded in the limiting notch 511 along the first inclined surface 512, and at the same time, the arc-shaped protrusion 542 of the elastic clip 54 is inserted into the corresponding positioning groove 111, locking the adjustment plate 51, thereby limiting and fixing the support plate 4; at this time, the support plate 4 cooperates with the diagonal support block 42 to provide a stable support structure for the crossarm, and the end of the crossarm is inserted into the positioning notch 411, and then bolts are used to pass through the crossarm through hole and the installation through hole 43 to complete the precise installation.

[0041] In addition, the control protrusion 71 of the control member 7 moves downward with the adjustment plate 51, squeezing the guide slope 61 of the locking rod 6 so that it passes through the overlapping locking through hole 32. At the same time, the first spring 81 of the elastic reset member 8 provides a reset force after locking, and cooperates with the baffle 82 and the guide block 83 to realize the sliding adjustment of the locking rod 6, further fixing the clamp structure; when the support plate 4 is rotated to the vertical state, the elastic clip 54 is snapped into another positioning groove 111, and the overall size of the clamp is reduced, which is convenient for packaging and transportation, and can be flexibly switched to another state through the adjustment member 5.

[0042] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A double-top double-hoop for an overhead transmission line, comprising two fixed plates (1), two arc-shaped hoop bodies (2) fixedly arranged side by side on one side of each of the two fixed plates (1), connecting plates (3) fixedly arranged at both ends of the arc-shaped hoop bodies (2), and connecting through holes (31) opened on the connecting plates (3); the arc-shaped hoop bodies (2) on the two fixed plates (1) can be arranged around the outer periphery of the line rod, and at this time, the opposite connecting through holes (31) on the two fixed plates (1) overlap; It is characterized by: A support plate (4) is vertically mounted on the side of the fixing plate (1) away from the arc-shaped hoop body (2); a mounting through hole (43) is provided on the support plate (4); limiting convex plates (41) are fixed on two opposite edges of the support plate (4); the support plate (4) and the two limiting convex plates (41) are jointly arranged to form a positioning notch (411) for the end of the cross arm to be inserted into.

2. The double-top double-hoop for overhead transmission lines according to claim 1, characterized in that: The side of the fixing plate (1) away from the arc-shaped hoop body (2) is rotatably connected to one side of the support plate (4), and the support plate (4) can be rotated to a state parallel to and perpendicular to the fixing plate (1); A diagonal support block (42) is fixedly provided on the side of the support plate (4) away from the limiting convex plate (41); one side of the diagonal support block (42) abuts against the side of the fixed plate (1) when the support plate (4) and the fixed plate (1) are perpendicular; an adjusting member (5) for fixing the rotation angle of the support plate (4) is installed on the fixed plate (1).

3. The double top double clamp for overhead transmission lines according to claim 2, characterized in that: The adjusting member (5) comprises an adjusting plate (51) slidably arranged on a side of the fixing plate (1) away from the arc-shaped hoop body (2), and the adjusting plate (51) is capable of sliding back and forth in a direction close to the supporting plate (4); The side of the adjustment plate (51) facing the support plate (4) is provided with a limiting notch (511) for the limiting convex plate (41) to be inserted into. When the support plate (4) is in a horizontal or vertical state, the edge of the limiting convex plate (41) can be inserted into the limiting notch (511) as the adjustment plate (51) slides.

4. The double-top double-hoop for overhead transmission lines according to claim 3, characterized in that: A first inclined surface (512) is provided on the opening edge of the limiting notch (511).

5. The double top double clamp for overhead transmission lines according to claim 3, characterized in that: The two opposite sides of the adjustment plate (51) are fixedly provided with bending plates (52) facing the fixed plate (1), and the two opposite side surfaces of the fixed plate (1) are in contact with the side surfaces of the two bending plates (52) that are close to each other; Guide protrusions (53) are fixedly provided on the sides of the two bending plates (52) that are close to each other, and guide slots (11) for the guide protrusions (53) to be inserted and slided are provided on the two opposite sides of the fixed plate (1).

6. The double-top double-hoop for overhead transmission lines according to claim 5, characterized in that: An elastic clamping member (54) is provided on the side surfaces of the two guide protrusions (53) close to each other, and a plurality of positioning grooves (111) for the elastic clamping member (54) to be clamped into are provided on the inner wall of the guide slide groove (11).

7. The double-top double-hoop for overhead transmission lines according to claim 5, characterized in that: A locking rod (6) is slidably provided on the side surface of the fixing plate (1), wherein the locking rod (6) is perpendicular to the sliding direction of the adjustment plate (51), and a locking through hole (32) is provided on the connecting plate (3) for the end of the locking rod (6) to be slidably inserted; The locking rod (6) can simultaneously penetrate two overlapping locking through holes (32) when the connecting plate (3) abuts against the connecting plate (3); a control member (7) for driving the locking rod (6) to be inserted into the locking through hole (32) and an elastic reset member (8) for driving the locking rod (6) to be disengaged from the locking through hole (32) are installed on the side surface of the fixing plate (1).

8. The double top double clamp for overhead transmission lines according to claim 7, characterized in that: The elastic return member (8) comprises a first spring (81), a baffle (82) fixed on the outer periphery of the locking rod (6), and a guide block (83) fixed on the fixed plate (1); the guide block (83) is provided with a guide hole for the locking rod (6) to pass through; the baffle (82) is located on the side of the guide block (83) away from the connecting plate (3); and the two ends of the first spring (81) are respectively fixedly connected to the side surfaces of the guide block (83) and the baffle (82) close to each other.

9. The double-top double-hoop for overhead transmission lines according to claim 7, characterized in that: The control member (7) comprises a control protrusion (71) fixed on the bending plate (52); a guide inclined surface (61) is provided on the edge of the end of the locking rod (6) away from the connecting plate (3); the control protrusion (71) can press the locking rod (6) along the guide inclined surface (61) to make the locking rod (6) slide in a direction close to the connecting plate (3).

10. The double top double clamp for overhead transmission lines according to claim 1, characterized in that: The limiting convex plate (41) is provided with a second inclined surface (412) on the opening edge of the positioning notch (411).

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