Wire clamp fitting for six split conductors of extra-high voltage direct current converter station

Abstract

The invention relates to an extra-high voltage direct current converter station six-split conductor clamp fitting, which comprises a bus clamp, a sub-wire clamp and a locking assembly, and is characterized in that the bus clamp is provided with two semicircular cylinders which can be in butt joint to form a mother conductor clamping cavity, and the head ends of the semicircular cylinders are provided with semicircular check rings. The number of the sub-wire clamps is six, the sub-wire clamps are distributed on the outer side face of the check ring of the bus clamp, and each sub-wire clamp comprises a wire penetrating cylinder, an arc-shaped clamping plate and a puller bolt. The locking assembly comprises a front thread head, a rear thread head, a locking cylinder and a locking rod. The locking rod comprises a rod body and an anti-disengaging head. Through the closed-loop anti-loosening structural design of the locking rod and the locking cylinder, the problem that a traditional wire clamp bolt is prone to loosening is effectively solved, the locking rod penetrates through the check ring and the puller bolt to limit the rotation freedom degree of the bolt, the locking cylinder abuts against the anti-loosening head after being screwed, double anti-loosening is formed, dynamic loads such as wind loads and electromagnetic vibration are resisted, it is guaranteed that a wire is clamped stably, and the service life of the wire clamp is prolonged. And the falling risk is avoided.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology, specifically to a six-split conductor clamp fitting for an ultra-high voltage direct current converter station. Background Technology

[0002] As a core hub facility in my country's energy internet, ultra-high voltage direct current (UHVDC) converter stations undertake the critical task of long-distance, high-capacity power transmission, and their operational stability directly determines the reliability of inter-regional power transmission. The six-split conductor clamp hardware (hereinafter referred to as "six-split clamp hardware") of UHVDC converter stations, as a key component connecting the six-split conductors to the converter station equipment and tower structure, is the core supporting component for achieving conductor fixation, current conduction, and force transmission.

[0003] A six-split conductor clamp typically consists of four parts: the busbar clamp body, the split conductor clamps, the connecting bolt assembly, and the insulation and protective accessories. The busbar clamp body is the core load-bearing structure, generally made of high-strength aluminum alloy through forging or precision casting. It features an internal arc-shaped clamping surface that matches the busbar conductor, ensuring stable current conduction. The split conductor clamps are arranged in an array on both sides of the busbar clamp body, each clamping one split conductor. Their clamping surfaces are typically inlaid with a conductive graphite pad, enhancing clamping friction and ensuring conductivity. The connecting bolt assembly includes high-strength bolts, nuts, and flat washers, used to achieve a rigid connection between the busbar clamp and the split conductor clamps, while also transferring conductor tension to the support structure. The insulation and protective accessories are mostly made of silicone rubber, wrapped around the outside of the clamp fittings, providing protection against flashover, corrosion, and insulation.

[0004] The core functions of the six-split conductor clamp are reflected in three aspects: First, the mechanical fixing function, through the coordinated clamping of the busbar clamp and the split conductor clamp, the six-split conductor is stably fixed in the designated position, effectively bearing various mechanical stresses such as conductor self-weight, wind load, and icing load, preventing conductor displacement or vibration fatigue; Second, the current conduction function, with the excellent conductivity of each component of the clamp, low-impedance current transmission between the busbar and the split conductor is achieved, reducing power loss; Third, the connection and adaptation function, as a transitional connection component between the conductor and the converter station equipment, realizes reliable connection between conductors of different specifications, ensuring the integrity of the entire transmission circuit.

[0005] Reference 1: Chinese patent document with publication number CN 104362444 A Reference 1 discloses a split conductor clamp hardware for an ultra-high voltage direct current converter station and its branch clamps. The clamp hardware includes a busbar clamp, and at least two branch clamps are fixedly mounted on one end of the busbar clamp extending axially along the busbar hole, evenly distributed around the circumference of the busbar hole. Each branch clamp includes a finger-shaped support body and a clamping block, which together form a branch hole. The finger-shaped support body is L-shaped and has an axial mounting section extending axially along the branch hole and a radial mounting section extending radially along the branch hole, either integrally set or separately fixed on the busbar clamp. The clamping block is located inside the L-shaped finger-shaped support body and fixed on the axial mounting section. Branch grooves constituting the branch hole are provided on the opposing sides of the axial mounting section and the clamping block. The outer corner of the L-shaped finger-shaped support body is connected in an arc shape. The clamping blocks on each branch clamp are located inside the corresponding branch clamp facing the central axis of the busbar hole. The clamp hardware is easy to install and use, and has good anti-corona performance.

[0006] Reference 2: Chinese patent document with publication number CN 209169900 U Reference 2 discloses a branch clamp for split conductor clamps, including two female conduit clamps. Fixing blocks are installed on both sides of each female conduit clamp. Two second auxiliary positioning holes are provided on the outer surface of each fixing block. Two second screws are installed inside each of the second auxiliary positioning holes. Two circular grooves are provided on the inner side of each female conduit clamp. Eighteen first auxiliary positioning holes are provided at the upper end of each circular groove. An annular support is installed on the upper surface of the female conduit clamp. This series of structural features significantly reduces the installation and disassembly steps, thereby greatly reducing installation and disassembly time and saving manpower. Furthermore, the connection method of this device significantly reduces costs.

[0007] However, both types of clamps lack effective locking mechanisms in their structural design. Specifically, the connecting bolts used to fix the busbar clamps and the split sub-line clamps lack a dedicated anti-loosening locking mechanism. In the actual operation of UHVDC converter stations, the clamp hardware is subjected to a complex dynamic stress environment for extended periods: on the one hand, the conductors experience periodic oscillations under wind loads, subjecting the connecting bolts to repeated shear stress and torque; on the other hand, electromagnetic vibrations generated during converter station operation are transmitted to the clamp hardware via the conductors, causing slight displacement of the threaded pair between the bolts and nuts. This long-term dynamic load gradually leads to nut loosening. Loosening of the nuts not only reduces the clamping force on the conductor, increasing the contact resistance between the conductor and the clamp, thus causing localized heating and accelerating the aging of the clamp hardware; more seriously, it can lead to clamping failure, causing the conductor to loosen or fall off, directly threatening the operational safety of the UHVDC converter station and even causing large-scale power outages. Summary of the Invention

[0008] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art and to provide a six-split conductor clamp for an ultra-high voltage direct current converter station.

[0009] To address the shortcomings of the aforementioned technical problems, the present invention provides the following technical solution: a six-split conductor clamp for an ultra-high voltage direct current converter station, comprising: The busbar clamp has two semi-circular cylindrical bodies that can be joined together to form a busbar clamping cavity. A semi-circular retaining ring is provided at the head end of the semi-circular cylindrical body, and the inner side of the semi-circular retaining ring is connected to the head end of the semi-circular cylindrical body. There are six sub-clamps, which are distributed on the outer side of the retaining ring of the main clamp. Each sub-clamp includes a wire threading cylinder, an arc-shaped clamping plate, and a tightening bolt. The inner wall of the wire threading cylinder is provided with a relief groove that can accommodate the arc-shaped clamping plate. The arc-shaped clamping plate can move radially along the wire threading cylinder within the relief groove. Several threaded holes are provided on the wire threading cylinder along its length. The threaded holes are located in the inner wall area where the relief groove is provided. Each threaded hole is screwed with a tightening bolt. The locking assembly includes a front threaded head, a rear threaded head, a locking cylinder, and a locking rod. The front threaded head and the rear threaded head are respectively located at the head and tail of the semi-circular cylinder, and the front threaded head is located close to the retaining ring. Both the front threaded head and the rear threaded head are semi-circular tubular structures, and the outer walls of both the front threaded head and the rear threaded head are provided with external threads. The locking cylinder can be screwed onto the front threaded head and the rear threaded head. The nut of the tightening bolt is provided with a locking hole perpendicular to the axis of the screw, and the retaining ring is provided with an anti-loosening hole at the threaded section of the sub-clamp. The locking rod includes a rod body and an anti-loosening head. An anti-loosening sink hole is provided at the anti-loosening hole on the inner side of the retaining ring. The locking rod can pass through the anti-loosening hole on the retaining ring and the locking hole on the tightening bolt in sequence. Its anti-loosening head can be placed in the anti-loosening sink hole and tightened by the end of the locking cylinder.

[0010] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the side of the semi-circular cylinder in the length direction is provided with an extended connecting edge, and a plurality of connecting holes are provided on the extended connecting edge. The fastening bolt passes through the corresponding connecting holes of two semi-circular cylinders to fix them together.

[0011] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the sub-clamp includes three tightening bolts.

[0012] As a further optimization of the six-split conductor clamp hardware of the UHVDC converter station of the present invention: the locking hole on the tightening bolt is an elongated hole, and the length direction of the elongated hole is parallel to the end face of the nut of the tightening bolt.

[0013] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the locking cylinder includes a busbar clamp and a sub-line clamp, the inner diameter of the sub-line clamp is larger than the outer diameter of the busbar clamp, and the busbar clamp is provided with an internal thread that cooperates with the front thread head and the rear thread head.

[0014] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the locking cylinder is made of high-strength insulating material.

[0015] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the semi-circular cylinder, the threading cylinder and the arc-shaped clamping plate are all made of silicon-aluminum alloy.

[0016] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the anti-detachment countersunk hole is a round hole, and the anti-detachment head is a round handle structure that can be placed in the round hole.

[0017] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: the anti-loosening countersunk hole is an elongated hole connected to the anti-loosening hole, and the anti-loosening head is a long handle structure that can be placed in the elongated hole.

[0018] As a further optimization of the six-split conductor clamp hardware for ultra-high voltage DC converter stations of the present invention: conductive graphite pads are provided on the conductor clamping surfaces of both the bus clamp and the sub-clamp.

[0019] The present invention has the following beneficial effects: The present invention effectively solves the problem of easy loosening of traditional wire clamp bolts through the closed-loop anti-loosening structure design of the locking rod and locking cylinder. The locking rod is equipped with a retaining ring and a top bolt to restrict the bolt's rotational freedom. After the locking cylinder is screwed in, it tightens the anti-dislodgement head, forming a double anti-loosening structure to resist dynamic loads such as wind loads and electromagnetic vibrations, ensuring the stability of wire clamping and avoiding the risk of falling off. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the wire clamp hardware of the present invention (in its split state). Figure 2 This is a schematic diagram of the overall structure of the wire clamp hardware of the present invention (locked state). Figure 3 This is a schematic diagram of the structure of the busbar clamp in the wire clamp hardware of the present invention; Figure 4 This is a schematic diagram of the sub-clamp in the clamp fitting of the present invention; Figure 5 This is a schematic diagram of the locking assembly in the wire clamp fitting of the present invention; Marked in the image: 1. Busbar clamp; 101. Semi-circular cylinder; 1011. Extend the connecting edge; 1012. Fastening bolts; 102. Retaining ring; 1021. Anti-loosening hole; 1022. Anti-detachment sinker; 2. Sub-line clamp; 201. Threading spool; 202. Arc-shaped clamping plate; 203. Tighten the bolts; 2031, Locking Hole 3. Locking assembly; 301. Front threaded head; 302. Rear threaded head; 303. Locking cylinder; 304. Locking rod; 3041, Rod; 3042. Anti-hair loss. Detailed Implementation

[0021] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0022] As shown in the figure: A six-split conductor clamp fitting for an ultra-high voltage direct current converter station includes a busbar clamp 1, a sub-line clamp 2, and a locking assembly 3.

[0023] The busbar clamp 1 has two semi-circular cylindrical bodies 101 that can be joined together to form a busbar clamping cavity, and is integrally forged from silicon-aluminum alloy. This material has both high strength and excellent conductivity, which can not only bear the complex mechanical stresses such as the self-weight of the UHV conductor, wind load and ice load, but also reduce impedance loss during current transmission.

[0024] The semi-circular cylinder 101 has an extension connecting edge 1011 on its side along its length. Several connecting holes are provided on the extension connecting edge 1011. Fastening bolts 1012 pass through the corresponding connecting holes of two semi-circular cylinders 101 to fix them together. Three connecting holes are evenly distributed on each extension connecting edge. The two semi-circular cylinders 101 are rigidly connected by fastening bolts 1012 passing through the corresponding connecting holes, forming a busbar clamping cavity with a diameter matching the UHV busbar, ensuring the stability of the busbar fixation.

[0025] A semi-circular retaining ring 102 is provided at the head end of the semi-circular cylinder 101. The inner side of the semi-circular retaining ring 102 is connected to the head end of the semi-circular cylinder 101 to provide a stable mounting reference surface for the sub-clamp.

[0026] There are six sub-clamps 2, which are distributed on the outer side of the retaining ring 102 of the bus clamp 1. After installation, the six sub-clamps are evenly distributed in a circle along the outer side of the retaining ring 102 (the center angle between adjacent sub-clamps 2 is 60°), ensuring that the six split conductors are subjected to balanced force.

[0027] The sub-clamp 2 includes a wire-passing cylinder 201, an arc-shaped clamping plate 202, and a tightening bolt 203. The wire-passing cylinder has a wire channel inside. The inner wall of the wire-passing cylinder 201 is provided with a relief groove 2011 that can accommodate the arc-shaped clamping plate 202. The arc-shaped clamping plate 202 can move radially along the wire-passing cylinder 201 within the relief groove 2011.

[0028] The arc-shaped clamping plate 202 is made of the same silicon-aluminum alloy as the wire guide tube. Its arc-shaped surface fits the outer circle of the split wire, and a 2mm thick conductive graphite pad is embedded on the clamping surface. This pad increases the friction with the wire, improves clamping stability, and prevents the wire from vibrating and slipping. On the other hand, it optimizes the conductive contact effect, reduces contact resistance, and avoids localized heating.

[0029] The wire threading cylinder 201 has several threaded holes 2012 along its length. The threaded holes 2012 are located in the inner wall area with clearance grooves 2011. Each threaded hole 2012 is screwed with a tightening bolt 203. The screw end of the tightening bolt 203 contacts the arc-shaped clamping plate. By tightening the tightening bolt, the arc-shaped clamping plate is pushed to move radially, thereby achieving precise clamping of the split wire.

[0030] The locking assembly 3 includes a front threaded head 301, a rear threaded head 302, a locking cylinder 303, and a locking rod 304. The front threaded head 301 and the rear threaded head 302 are respectively located at the head and tail of the semi-circular cylinder 101, and the front threaded head 301 is located close to the retaining ring 102. Both the front threaded head 301 and the rear threaded head 302 are semi-circular tubular structures, which together form a complete tubular thread structure. The outer wall is machined with standard external threads.

[0031] The locking cylinder 303 is made of high-strength insulating material (weather-resistant silicone rubber reinforced composite material). The locking cylinder 303 can be screwed onto the front threaded head 301 and the rear threaded head 302. It is divided into a busbar clamp and a sub-line clamp: the inner wall of the busbar clamp is provided with internal threads that match the front and rear threaded heads for screwing and locking; the inner diameter of the sub-line clamp is larger than the outer diameter of the busbar clamp, forming an annular protective cavity, which provides insulation protection for the end of the cable puller and avoids corona discharge and external contamination corrosion.

[0032] The nut of the tightening bolt 203 is provided with a locking hole 2031 that is perpendicular to the axis of its screw, and the retaining ring 102 is provided with an anti-loosening hole 1021 corresponding to the wire tube 201 of the sub-wire clamp 2. The locking rod 304 includes a rod body 3041 and an anti-loosening head 3042. An anti-loosening sink hole 1022 is provided at the anti-loosening hole 1021 on the inner side of the retaining ring 102. The locking rod 304 can pass through the anti-loosening hole 1021 on the retaining ring 102 and the locking hole 2031 on the tightening bolt 203 in sequence. Its anti-loosening head 3042 can be placed in the anti-loosening sink hole 1022 and is tightened by the end of the locking cylinder 303.

[0033] The structure of the anti-detachment head 3042 is adapted to the anti-detachment countersunk hole on the inner side of the retaining ring 102. This embodiment provides two adaptation schemes: Option 1: The anti-detachment countersunk hole is a circular countersunk hole, and the anti-detachment head is a matching circular handle. Axial positioning is achieved by tightening the end of the locking cylinder. Option 2: The anti-loosening sink hole is a long strip hole connected to the anti-loosening hole, and the anti-loosening head is a long handle structure to achieve circumferential limiting and further improve the anti-loosening effect.

[0034] The inner wall of the busbar clamping cavity of busbar clamp 1 and the surface of the arc-shaped clamping plate of sub-clamp 2 are provided with conductive graphite pads. The contact surface between the pads and the conductors is sandblasted to enhance the fit with the conductors and reduce wear caused by conductor vibration.

[0035] The locking hole 2031 on the tightening bolt 203 is designed as an elongated hole, the length of which is parallel to the end face of the nut of the tightening bolt 203. The length of the elongated hole can accommodate the small displacement during the tightening process of the tightening bolt 203, ensuring that the locking rod 304 can pass through smoothly and avoiding assembly difficulties caused by bolt positioning deviation.

[0036] During installation, first attach the two semi-circular cylinders 101 to both sides of the UHV busbar, ensuring that the busbar is completely placed within the busbar clamping cavity formed by the connection of the two cylinders. Align the extended connecting edges 1011 of the two semi-circular cylinders 101, pass the fastening bolts 1012 through the corresponding connecting holes, and tighten the nuts with flat washers and anti-loosening washers, controlling the tightening torque to rigidly clamp the busbar. At the same time, ensure that the busbar is in close contact with the conductive graphite pad layer on the inner wall of the clamping cavity to ensure the stability of current transmission.

[0037] Next, insert the six split sub-conductors into the threading tubes 201 of the six sub-clamps 2, ensuring that the axis of the sub-conductor is parallel to the axis of the threading tube 201 and that the end of the sub-conductor does not extend beyond the port of the threading tube 201. Tighten the three tightening bolts 203 of each sub-clamp 2 one by one: tighten them step by step from the middle to both sides, controlling the tightening torque of each bolt to avoid excessive force on one side causing the sub-conductor to shift. During the tightening process, observe the movement trajectory of the arc-shaped clamping plate 202 to ensure that it moves smoothly along the clearance groove until the conductive graphite pad is tightly attached to the surface of the sub-conductor, achieving a firm clamping of the sub-conductor. At this time, the axes of the locking holes on the nuts of the three tightening bolts 203 on the same sub-clamp 2 naturally coincide and are coaxial with the anti-loosening holes 1021 at the corresponding positions on the retaining ring 102.

[0038] The locking rod 304 is passed sequentially through the anti-loosening hole 1021 on the retaining ring 102 and the locking holes 2031 of the three tightening bolts 203 of the same sub-clamp 2, so that the anti-loosening head 3042 is fully inserted into the elongated hole inside the retaining ring 102. By inserting the locking rod 304, the rotational freedom of the tightening bolts 203 is restricted, fundamentally preventing them from loosening under dynamic stress.

[0039] Finally, align the busbar clamp of the locking cylinder 303 with the rear threaded head 302, screw it in and continue pushing until the busbar clamp of the locking cylinder 303 completely covers the front threaded head 301 and the rear threaded head 302, and the end of the locking cylinder 303 is tightly fitted with the outer side of the retaining ring 102. At this time, the locking cylinder 303 applies a continuous locking force to the docking structure of the busbar clamp 1 through the thread engagement, enhancing the stability of the busbar clamping; on the other hand, it seals the anti-loosening countersunk hole 1022 on the inner side of the retaining ring 102, preventing the locking rod 304 from coming out from the countersunk hole side, forming a closed-loop locking mechanism that prevents the locking rod from loosening the bolt and the locking cylinder from coming out of the locking rod. The sub-line clamp of the locking cylinder 303 naturally covers the outer side of the end of the wire threading cylinder 201, forming an insulating protective barrier, effectively preventing corona discharge and corrosion from external pollutants such as rain, snow, and dust.

[0040] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A UHVDC converter station six-bundle conductor clamp fitting, characterized in that, include: The busbar clamp (1) has two semi-circular cylindrical bodies (101) that can be connected to form a busbar clamping cavity. A semi-circular retaining ring (102) is provided at the head end of the semi-circular cylindrical body (101), and the inner side of the semi-circular retaining ring (102) is connected to the head end of the semi-circular cylindrical body (101). The sub-clamps (2) are provided in six parts, which are distributed on the outer side of the retaining ring (102) of the main clamp (1). The sub-clamps (2) include a threading cylinder (201), an arc-shaped clamping plate (202) and a tightening bolt (203). The inner wall of the threading cylinder (201) is provided with a relief groove (2011) that can accommodate the arc-shaped clamping plate (202). The arc-shaped clamping plate (202) can move radially along the threading cylinder (201) in the relief groove (2011). The threading cylinder (201) is provided with a number of threaded holes (2012) along its length direction. The threaded holes (2012) are located in the inner wall area where the relief groove (2011) is provided. Each threaded hole (2012) is screwed with a tightening bolt (203). The locking assembly (3) includes a front threaded head (301), a rear threaded head (302), a locking cylinder (303), and a locking rod (304). The front threaded head (301) and the rear threaded head (302) are respectively located at the head and tail of the semi-circular cylinder (101), and the front threaded head (301) is located close to the retaining ring (102). Both the front threaded head (301) and the rear threaded head (302) are semi-circular tubular structures. The outer walls of both the front threaded head (301) and the rear threaded head (302) are provided with external threads. The locking cylinder (303) can be screwed onto the front threaded head (301) and the rear threaded head (302). The nut of the tightening bolt (203) is provided with a locking hole (2031) perpendicular to the axis of its screw, and the retaining ring (102) is provided with an anti-loosening hole (1021) at the threading tube (201) of the sub-clamp (2). The locking rod (304) includes a rod body (3041) and an anti-loosening head (3042). An anti-loosening sink hole (1022) is provided at the anti-loosening hole (1021) on the inner side of the retaining ring (102). The locking rod (304) can pass through the anti-loosening hole (1021) on the retaining ring (102) and the locking hole (2031) on the tightening bolt (203) in sequence. Its anti-loosening head (3042) can be placed in the anti-loosening sink hole (1022) and is tightened by the end of the locking cylinder (303).

2. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The semi-circular cylinder (101) has an extended connecting edge (1011) on its side along its length. The extended connecting edge (1011) has several connecting holes. Fastening bolts (1012) pass through the corresponding connecting holes of two semi-circular cylinders (101) to fix them together.

3. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The sub-clamp (2) includes three tightening bolts (203).

4. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The locking hole (2031) on the tightening bolt (203) is an oblong hole, and the length direction of the oblong hole is parallel to the end face of the nut of the tightening bolt (203).

5. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The locking cylinder (303) comprises a female line clamp (1) part and a male line clamp (2) part, the inner diameter of the male line clamp (2) part is greater than the outer diameter of the female line clamp (1) part, and the female line clamp (1) part is provided with internal threads for cooperating with the front threaded head (301) and the rear threaded head (302).

6. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The locking cylinder (303) is made of high-strength insulating material.

7. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The semi-circular cylinder body (101), the threading cylinder (201) and the arc-shaped clamping plate (202) are made of silicon-aluminum alloy.

8. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The anti-falling hole (1022) is a round hole, and the anti-falling head (3042) is a round handle structure capable of being placed in the round hole.

9. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The anti-falling hole (1022) is a long hole connected with the anti-loosening hole (1021), and the anti-falling head (3042) is a long handle structure capable of being placed in the long hole.

10. The UHVDC converter station six-bundle conductor clamp fitting of claim 1, wherein: The female line clamp (1) and the male line clamp (2) are both provided with conductive graphite pads on the wire clamping surfaces.

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