A valve hall valve tower right-angle fitting for an extra-high voltage converter station

Abstract

This invention relates to the field of power equipment technology, and in particular to a right-angle fitting for a valve hall and valve tower in an ultra-high voltage converter station. The fitting includes a support column with a disc fixedly connected to its outer wall; a shielding ball with a fixing ring fixedly connected to its inner wall, and multiple circumferentially arrayed connecting rods connecting the fixing ring and the disc; a connector fixedly connected to the top of the support column, with a sliding joint and a rotating joint movably connected to the connector, one end of which is respectively connected to a sliding end and a fixed end of a nut; multiple insulating sleeves detachably connected to the outside of the sliding end and the fixed end of the nut; and a protective mechanism disposed between the insulating sleeves and the shielding ball, comprising a reinforcing sleeve, a ring, and a protective cloth. This invention, by incorporating a protective mechanism and an adjustment unit, effectively reduces redundant space, prevents bird intrusion, and improves seismic performance, offering advantages such as reduced redundant space, lower risk of bird intrusion, and improved seismic performance.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station. Background Technology

[0002] In the valve hall of an ultra-high voltage (UHV) converter station, the right-angle bend connection of the busbar is a critical link in the power transmission system, requiring the fittings to provide sufficient freedom of installation angle adjustment and highly reliable electrical connection performance to ensure stable system operation. However, existing right-angle fittings generally suffer from structural design flaws, resulting in a large overall size and excessive redundant adjustment space between the shielding ball and the busbar. Although the valve hall is usually located in a closed indoor environment with bird-repelling devices around it, the openings in the ventilation system still provide potential entry channels for birds. Once birds enter the valve hall and penetrate the fittings, they may cause short circuits, insulation failure, or physical damage to the equipment, seriously threatening the safe operation of the converter station. In addition, existing fittings have significant deficiencies in seismic resistance. Under external vibrations such as earthquakes, the busbar connection is prone to loosening, displacement, or even breakage, leading to power transmission interruption and potentially triggering cascading failures and major safety accidents. These technical problems not only increase the difficulty of operation and maintenance but also pose a continuous challenge to the overall reliability of the UHV system. Therefore, existing technologies urgently need improvement to address these issues. Summary of the Invention

[0003] The purpose of this application is to provide a right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station, which has the advantages of reducing redundant space, reducing the risk of bird intrusion, and improving seismic performance.

[0004] The present invention provides a right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station, which adopts the following technical solution:

[0005] A right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station includes:

[0006] The support column has a disc fixedly connected to its outer wall;

[0007] The shielding sphere has a fixed ring fixedly connected to its inner wall, and multiple circumferential array connecting rods are connected between the fixed ring and the disk.

[0008] The connector is fixedly connected to the top of the support column. The connector is movably connected with a sliding joint and a rotating joint. One end of the sliding joint and the rotating joint are respectively connected to the sliding end of the nut and the fixed end of the nut.

[0009] Insulating sleeves, which are provided in multiples and detachably connected to the outside of the sliding end and the fixed end of the tube nut;

[0010] The protective mechanism is located between the insulating sleeve and the shielding ball. The protective mechanism includes a reinforcing sleeve, a ring, and a protective cloth. The reinforcing sleeve wraps around the outside of the insulating sleeve and is detachably connected to the insulating sleeve. The ring is integrally connected to the shielding ball. The protective cloth is located between the reinforcing sleeve and the shielding ball. An adjustment unit for adjusting and supporting the protective cloth is also provided between the reinforcing sleeve and the shielding ball. The adjustment unit includes a viscoelastic damping rod. One end of the viscoelastic damping rod is provided with a limit module between it and the reinforcing sleeve, and the other end is rotatably connected to the ring.

[0011] Furthermore, this application also proposes that the limiting module includes a limiting box, multiple limiting boxes are arranged in a circumferential array and embedded in the reinforcing sleeve, an insert block is slidably connected inside the limiting box, a fixing ear is provided on the insert block, a crossbar is fixedly connected to the fixing ear, one end of a viscoelastic damping rod is rotatably connected to the crossbar, a slider is slidably connected inside the limiting box, a guide groove is opened in the slider, a pull rod is provided inside the limiting box, one end of the pull rod is rotatably connected to the limiting box, and the other end is movably locked in the guide groove, a fixing post is fixedly connected inside the limiting box, a return spring is connected between the fixing post and the slider, a hook is integrally fixedly connected to the slider, a locking groove adapted to the hook is opened on the insert block, a rotating rod is rotatably connected to one end of the crossbar, a traction guide is wound on the rotating rod, one end of the traction guide is inserted into the insert block and fixedly connected to a paddle slidably connected to the bottom of the insert block, when the paddle abuts against the hook, the hook disengages from the locking groove and releases the limiting.

[0012] Furthermore, this application also proposes that the end of the insert block near the viscoelastic damping rod is provided with an insertion hole, a column is fixed in the insertion hole, an alignment groove is provided in the bottom wall of the limiting box, and a guide post adapted to the alignment groove is fixedly connected to the bottom end of the insert block.

[0013] Furthermore, this application also proposes that the turns inside the guide groove be designed in a stepped shape to limit the direction of movement of the tie rod.

[0014] Furthermore, this application also proposes that a plurality of through slots are provided inside the ring, and a U-shaped clamp can be detachably connected to each through slot. A hollow fixing rod is fixedly connected to the inner side of the U-shaped clamp, and a telescopic insertion rod is slidably connected inside the fixing rod. A sliding groove is provided on the fixing rod, and a lever extending to the outside of the fixing rod is fixedly connected to the outer wall of the telescopic insertion rod. The lever is located in the sliding groove, and a compression spring is fixedly connected between the lever and the fixing rod. Both ends of the telescopic insertion rod are inserted into the ring, and one end of the viscoelastic damping rod is rotatably connected to the U-shaped clamp.

[0015] Furthermore, this application also proposes that the outer wall of the viscoelastic damping rod is fixedly connected with a lifting ring, the outer layer of the protective cloth is an insulating layer, and its inner layer is a silver-plated fiber mesh to maintain the continuity of electrostatic shielding. Multiple end clips are movably connected to both ends of the protective cloth, which are detachably connected to the insertion hole and the U-shaped clip respectively. Multiple connecting buckles are provided on the protective cloth, and the connecting buckles are fastened to the lifting ring.

[0016] Furthermore, this application also proposes that a current-carrying conductor is connected between the sliding end and the fixed end of the tube nut, the current-carrying conductor is made of pure aluminum stranded wire, and an equipotential line is installed between the support column and the current-carrying end to avoid discharge arcing.

[0017] Furthermore, this application also proposes that a connecting bolt is fixedly connected between the insulating sleeve and the reinforcing sleeve, and the connecting bolt is recessed into the interior of the insulating sleeve to improve the anti-corona capability.

[0018] Furthermore, this application also proposes that an insulating support rod is coaxially fixedly connected inside the sliding end of the tube.

[0019] In summary, the present invention has at least one of the following beneficial technical effects:

[0020] 1. By setting up protective mechanisms and adjustment units, redundant space is effectively reduced, bird intrusion is prevented, and seismic performance is improved. It has the advantages of reducing redundant space, reducing the risk of bird intrusion, and improving seismic performance.

[0021] 2. By utilizing the mobility at both ends of the protective mechanism, the adjustment capability during pipe connection is ensured, and the protective mechanism can be quickly disassembled and assembled, thus facilitating cleaning and maintenance. It also effectively prevents the protective mechanism from contacting the pipe, providing a certain level of protection while ensuring the normal operation of the valve station, and meeting people's usage needs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a right-angle fitting for a valve hall and valve tower in an ultra-high voltage converter station, as described in this embodiment.

[0023] Figure 2 This is a schematic diagram of the internal three-dimensional structure of a right-angle fitting in the valve hall and valve tower of an ultra-high voltage converter station in this embodiment.

[0024] Figure 3 This is a top view schematic diagram of the internal structure of a right-angle fitting for a valve hall and valve tower in an ultra-high voltage converter station according to this embodiment.

[0025] Figure 4 This is a schematic diagram of the internal partial structure of a right-angle fitting for a valve hall and valve tower in an ultra-high voltage converter station according to this embodiment.

[0026] Figure 5 yes Figure 4 Enlarged structural diagram at point A in the middle.

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the limiting module in this embodiment.

[0028] Figure 7 This is an isometric structural diagram of the limiting module in this embodiment.

[0029] Figure 8This is a schematic diagram of the unfolded structure of the protective fabric in this embodiment.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Support column; 11. Fixed end of nut; 12. Sliding end of nut; 13. Disc; 14. Connecting rod; 15. Fixing ring; 16. Equipotential line; 17. Current-carrying conductor; 2. Shielding ball; 3. Connector; 31. Sliding pair; 32. Rotating pair; 33. Insulating support rod; 4. Insulating sleeve; 41. Connecting bolt; 5. Protective mechanism; 51. Reinforcing sleeve; 52. Ring; 53. Protective cloth; 531. Insulating layer; 532. Silver-plated fiber mesh; 533. Connecting buckle; 534. End retaining ring; 54. Adjusting unit; 541. U-shaped clamp; 542, fixing rod; 543, telescopic insertion rod; 544, lever; 545, compression spring; 546, viscoelastic damping rod; 5461, lifting ring; 547, limit box; 5471, slider; 5472, guide groove; 5473, return spring; 5474, pull rod; 5475, fixing post; 5476, hook; 5477, alignment groove; 548, insertion block; 5481, insertion hole; 5482, locking groove; 549, crossbar; 5491, rotating rod; 5492, traction guide tube; 5493, lever. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-8 The present invention will be described in further detail below.

[0033] This invention discloses a right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station.

[0034] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Reference Figures 1-8 A right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station, comprising:

[0036] Support column 1, with a disc 13 fixedly connected to its outer wall;

[0037] The shielding ball 2 has a fixed ring 15 fixedly connected to its inner wall, and a plurality of circumferential array of connecting rods 14 are connected between the fixed ring 15 and the disk 13.

[0038] Connector 3 is fixedly connected to the top of support column 1. A sliding joint 31 and a rotating joint 32 are movably connected to connector 3. One end of the sliding joint 31 and the rotating joint 32 are respectively connected to the sliding end 12 of the nut and the fixed end 11 of the nut.

[0039] Insulating sleeve 4, which is provided in multiple parts and is detachably connected to the outside of the sliding end 12 and the fixed end 11 of the tube nut respectively;

[0040] A protective mechanism 5 is disposed between the insulating sleeve 4 and the shielding ball 2. The protective mechanism 5 includes a reinforcing sleeve 51, a ring 52, and a protective cloth 53. The reinforcing sleeve 51 wraps around the outside of the insulating sleeve 4 and is detachably connected to the insulating sleeve 4. The ring 52 is integrally connected to the shielding ball 2. The protective cloth 53 is disposed between the reinforcing sleeve 51 and the shielding ball 2. An adjustment unit 54 for adjusting and supporting the protective cloth 53 is also provided between the reinforcing sleeve 51 and the shielding ball 2. The adjustment unit 54 includes a viscoelastic damping rod 546. One end of the viscoelastic damping rod 546 is provided with a limit module between it and the reinforcing sleeve 51, and the other end is rotatably connected to the ring 52. This application reduces the size of the metal body, prevents foreign objects from entering, and improves seismic performance while ensuring the installation angle adjustment range and electrical connection performance.

[0041] For ease of understanding, the following explains some key terms in this embodiment:

[0042] The support column 1 is the main structure of the fitting, used to provide overall mechanical support. Its outer wall is designed to support other components, such as the disc 13. The disc 13 acts as a connector, used to connect with the fixing ring 15 of the shielding ball 2 via the connecting rod 14, thereby forming a structurally stable connection.

[0043] The shielding ball 2 is a conductive component on the outside of the fitting. Its function is to provide electric field shielding to optimize the electric field distribution and prevent corona discharge and partial discharge. The fixing ring 15 fixedly connected to its inner wall is connected to the disk 13 on the support column 1 through multiple circumferential array connecting rods 14 to ensure the stability of the shielding ball 2's positioning.

[0044] The connector 3 is fixed to the top of the support column 1 and is the component that realizes the connection of the busbar. The connector 3 is movably connected to a sliding joint 31 and a rotating joint 32. These joint structures allow the sliding end 12 and the fixed end 11 of the busbar to be adjusted in position and angle within a certain range to adapt to different installation requirements. The sliding end 12 and the fixed end 11 of the busbar are the interfaces for connecting to external busbars, respectively realizing the sliding connection and the fixed connection of the busbar.

[0045] The insulating sleeve 4 is used to wrap the outside of the sliding end 12 and the fixed end 11 of the nut, providing electrical insulation protection to prevent short circuits and leakage. The insulating sleeve 4 is usually made of a material with insulating properties and is designed to be detachable for easy installation and maintenance.

[0046] A protective mechanism 5 is positioned between the insulating sleeve 4 and the shielding ball 2, providing additional mechanical and environmental protection. This protective mechanism 5 includes a reinforcing sleeve 51, a ring 52, and a protective fabric 53. The reinforcing sleeve 51 wraps around the outside of the insulating sleeve 4, providing mechanical strength and support, while also providing insulation. The ring 52 is integrally connected to the shielding ball 2, serving as the fixed end of the protective fabric 53. The protective fabric 53 forms a flexible, adjustable structure between the reinforcing sleeve 51 and the shielding ball 2 to prevent foreign objects from entering.

[0047] An adjustment unit 54 is disposed between the reinforcing sleeve 51 and the shielding ball 2, and is used to adjust and support the protective cloth 53. The adjustment unit 54 includes a viscoelastic damping rod 546, one end of which is connected to the reinforcing sleeve 51 via a limit module, and the other end is rotatably connected to the ring 52. The viscoelastic damping rod 546 provides damping, absorbs vibration energy, thereby enhancing the vibration resistance of the fittings and maintaining the tension of the protective cloth 53. It also serves as an adjustment guide component, coordinating with the connection of the nut for synchronous adjustment. The limit module restricts the range of motion of the viscoelastic damping rod 546, ensuring it operates within a preset position.

[0048] This embodiment provides a right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station, the structure and working principle of which are as follows:

[0049] The support column 1 serves as the load-bearing main body of the hardware, and its outer wall is designed to be fixedly connected to the disc 13. The disc 13 can be fixed to the outer wall of the support column 1 by means of welding, bolting, or riveting to ensure structural stability. For example, the disc 13 can be pre-fabricated and then connected to the outer wall of the support column 1 by a circumferential weld.

[0050] A retaining ring 15 is fixedly connected to the inner wall of the shielding sphere 2. This retaining ring 15 is connected to the disk 13 on the support column 1 via a plurality of circumferentially arranged connecting rods 14. The connecting rods 14 can be rigid members, such as metal bars, and are connected to the retaining ring 15 and the disk 13 respectively by bolts or welding. The circumferential array arrangement of these connecting rods 14 helps to evenly distribute the weight and external load of the shielding sphere 2 and maintain the relative position between the shielding sphere 2 and the support column 1.

[0051] The connector 3 is fixedly connected to the top of the support column 1. A sliding joint 31 and a rotating joint 32 are movably connected to the connector 3. The sliding joint 31 can be a groove structure, allowing the sliding end 12 of the nut to move linearly in one direction; the rotating joint 32 can be a ball joint or universal joint structure, allowing the fixed end 11 of the nut to be adjusted in angle. The sliding end 12 and the fixed end 11 of the nut are respectively connected to the external nut busbar to achieve electrical connection.

[0052] Multiple insulating sleeves 4 are provided and are detachably connected to the outside of the sliding end 12 and the fixed end 11 of the nut. The insulating sleeves 4 can be of a split structure, which is fixed to the outside of the sliding end 12 and the fixed end 11 of the nut. This detachable design facilitates operation during installation or maintenance.

[0053] A protective mechanism 5 is disposed between the insulating sleeve 4 and the shielding ball 2. This protective mechanism 5 includes a reinforcing sleeve 51, a ring 52, and a protective fabric 53. The reinforcing sleeve 51 wraps around the outside of the insulating sleeve 4 and is detachably connected to the insulating sleeve 4, for example, via Velcro or a zipper. The ring 52 is integrally connected to the shielding ball 2, either directly formed during the manufacturing of the shielding ball 2 or securely connected by welding or other methods. The protective fabric 53 is disposed between the reinforcing sleeve 51 and the shielding ball 2, forming a flexible structure. This protective fabric 53 can be made of a stretchable, insulating fabric material, and its edges can be sewn or glued to the reinforcing sleeve 51 and the ring 52.

[0054] An adjustment unit 54 for adjusting and supporting the protective fabric 53 is also provided between the reinforcing sleeve 51 and the shielding ball 2. This adjustment unit 54 includes a viscoelastic damping rod 546. The viscoelastic damping rod 546 can be a rod with elastic and damping properties, such as a hydraulic damper internally filled with a viscous fluid, or a combination of a spring and a friction damper. A limit module is provided between one end of the viscoelastic damping rod 546 and the reinforcing sleeve 51, allowing it to swing within a certain range. The other end of the viscoelastic damping rod 546 is rotatably connected to the ring 52 via a pin to accommodate the deformation of the protective fabric 53 under stress.

[0055] The right-angle fittings for the valve hall and valve tower of the UHV converter station in this application optimize the adjustment space between the shielding ball and the main pipe through structural design optimization. The setting of the protective mechanism 5, especially the introduction of the protective cloth 53, can prevent foreign objects such as birds from entering the fitting, thereby avoiding equipment damage. In addition, the application of the viscoelastic damping rod 546 in the adjustment unit 54 provides damping support for the fitting, enhances its seismic performance, reduces the possibility of the main pipe connection breaking during an earthquake, and improves the reliability and safety of the operation of the valve hall equipment in the UHV converter station.

[0056] In some embodiments of this application, the adjustment unit 54 in the protective mechanism 5 includes a viscoelastic damping rod 546, one end of which is provided with a limiting module between itself and the reinforcing sleeve 51. However, in practical applications, if the structural design of the limiting module is too simple, it may lead to inconvenience in installing, disassembling, or adjusting the position of the viscoelastic damping rod 546, resulting in low operating efficiency. Furthermore, it may cause problems such as unstable connection or inaccurate positioning during long-term operation, thereby affecting the effective support and adjustment function of the protective cloth 53.

[0057] In this regard, refer to Figure 1 , Figure 6 and Figure 7 This application further proposes that the aforementioned limiting module includes a limiting box 547, of which multiple limiting boxes 547 are arranged in a circumferential array and embedded in the reinforcing sleeve 51. The limiting box 547 serves as the main structural component connecting the viscoelastic damping rods 546 to the reinforcing sleeve 51, and its interior houses multiple components that realize the limiting and unlocking functions. The limiting box 547 is typically made of high-strength, corrosion-resistant insulating materials, such as engineering plastics or composite materials, to ensure its stability and insulation performance under ultra-high voltage environments. Its circumferential array embedded in the reinforcing sleeve 51 means that the multiple viscoelastic damping rods 546 can be evenly distributed, providing balanced support for the protective fabric 53.

[0058] A sliding block 548 is slidably connected within the limiting box 547. The sliding block 548 is typically made of insulating or metallic material and is designed to allow limited sliding within the limiting box 547 for locking and unlocking operations. The sliding block 548 has a fixing lug, to which a crossbar 549 is fixedly connected. One end of a viscoelastic damping rod 546 is rotatably connected to the crossbar 549. The fixing lug provides a connection point, and the crossbar 549 is rotatably connected to one end of the viscoelastic damping rod 546. This rotatable connection allows the viscoelastic damping rod 546 to be adjusted within a certain range to accommodate tension variations or installation errors in the protective fabric 53, while avoiding stress concentration caused by a rigid connection.

[0059] A slider 5471 is slidably connected inside the limiting box 547, and a guide groove 5472 is formed inside the slider 5471. A pull rod 5474 is provided inside the limiting box 547, one end of which is rotatably connected to the limiting box 547, and the other end is movably locked in the guide groove 5472. The slider 5471 slides inside the limiting box 547, and the guide groove 5472 inside it cooperates with the pull rod 5474 to form a linkage mechanism. By inserting the insert block 548, the slider 5471 is compressed, causing the slider 5471 to slide, which can drive the pull rod 5474 to slide along the guide groove 5472, thereby controlling the action of the subsequent hook 5476. A fixing post 5475 is fixedly connected inside the limiting box 547, and a return spring 5473 is connected between the fixing post 5475 and the slider 5471. The function of the return spring 5473 is to provide a preload so that the slider 5471 can automatically return to a preset position when no external force is applied. When locked, the return spring 5473 is in a stretched state.

[0060] A hook 5476 is integrally fixedly connected to the slider 5471, and a locking groove 5482 adapted to the hook 5476 is provided on the insert block 548. When the slider 5471 is in the locked position under the action of the return spring 5473, the hook 5476 will engage with the locking groove 5482, thereby limiting the insert block 548 and preventing it from sliding out. This structure achieves a reliable connection between the viscoelastic damping rod 546 and the reinforcing sleeve 51.

[0061] A rotating rod 5491 is rotatably connected to one end of a crossbar 549. A traction guide tube 5492 is wound onto the rotating rod 5491. One end of the traction guide tube 5492 is inserted into the insert block 548 and fixedly connected to a lever 5493 that is slidably connected to the bottom of the insert block 548. This structure is key to unlocking the device. The traction guide tube 5492, through the rotation of the rotating rod 5491, drives the lever 5493 to slide at the bottom of the insert block 548. When the lever 5493 slides and abuts against the hook 5476, the return spring 5473 pushes the insert block 548 out, disengaging the hook 5476 from the locking groove 5482, thus releasing the restriction on the insert block 548. This design provides a convenient and reliable unlocking method, allowing the viscoelastic damping rod 546 to be quickly installed or removed without complex tools or operations.

[0062] Through the above technical solution, this application provides a viscoelastic damping rod limiting module with a compact structure, convenient operation, and reliable connection. This limiting module, through the cooperation of the limiting box 547, the insert block 548, the slider 5471, the hook 5476, and the locking groove 5482, achieves rapid locking and unlocking between the viscoelastic damping rod 546 and the reinforcing sleeve 51. Specifically, when the insert block 548 is inserted into the limiting box 547, the insert block 548 drives the slider 5471, causing the hook 5476 to automatically engage in the locking groove 5482 of the insert block 548, thereby achieving automatic and reliable limiting of the viscoelastic damping rod 546. When disassembly or adjustment is required, the traction guide tube 5492 drives the lever 5493, which abuts against the hook 5476, disengaging it from the locking groove 5482, thus easily releasing the limiting and allowing the insert block 548 to be quickly pulled out. This design greatly simplifies the installation and maintenance process of the protective cloth 53, improves on-site work efficiency, and ensures the stability of the viscoelastic damping rod 546 connection and the accuracy of its positioning. It effectively avoids the problem of support failure of the protective cloth 53 due to weak connection, thereby ensuring the long-term stable operation of the protective mechanism 5.

[0063] In some embodiments of this application, the adjustment unit 54 of the protective mechanism 5 includes a viscoelastic damping rod 546, one end of which is provided with a limiting module between itself and the reinforcing sleeve 51. This limiting module achieves quick connection and locking of the viscoelastic damping rod 546 through the cooperation of the limiting box 547 and the insert block 548. However, in actual operation, especially during installation or maintenance, accurately and stably inserting the insert block 548 into the limiting box 547 and ensuring its reliable alignment may be challenging. Improper operation can easily lead to the insert block 548 getting stuck or misaligned, affecting installation efficiency and connection reliability.

[0064] In this regard, refer to Figures 1-8 This application further proposes that the insert block 548 has an insertion hole 5481 at one end near the viscoelastic damping rod 546, the insertion hole 5481 is fixed with a column, the bottom wall of the limiting box 547 has an alignment groove 5477, and the bottom end of the insert block 548 is fixedly connected with a guide post that matches the alignment groove 5477.

[0065] Specifically, the insert block 548 has an insertion hole 5481 at one end near the viscoelastic damping rod 546. This insertion hole 5481 is an interface on the insert block 548 for connecting to other components, such as the end retaining ring 534 of the protective fabric 53. The shape and size of the insertion hole 5481 can be designed according to actual connection requirements, such as a circular, square, or irregularly shaped hole. A post is fixedly connected inside the insertion hole 5481. This post is typically a rod-shaped structure, made of high-strength, corrosion-resistant metal or engineering plastic, and is fixed inside the insertion hole 5481 by welding, threaded connection, or integral molding. The function of the post is to provide a stable insertion or locking point for the connecting component (such as the end retaining ring 534 of the protective fabric 53), ensuring the reliability and stability of the connection.

[0066] Meanwhile, the inner bottom wall of the limiting box 547 is provided with an alignment groove 5477. The alignment groove 5477 is a structure inside the limiting box 547 used to guide the precise insertion of the insert block 548. Its shape and size match the guide post at the bottom of the insert block 548. The alignment groove 5477 can be a recess, and its cross-sectional shape can be circular, square, or V-shaped, etc., to provide a good guiding effect. The bottom end of the insert block 548 is fixedly connected to a guide post that matches the alignment groove 5477. This guide post is a protruding structure at the bottom of the insert block 548. Its shape and size precisely match the alignment groove 5477. The function of the guide post is to allow the insert block 548 to slide smoothly into the alignment groove 5477 when it is inserted into the limiting box 547, thereby guiding the insert block 548 to make precise alignment and preventing the insert block 548 from deviating or getting stuck during the insertion process.

[0067] Through the above technical solution, during the insertion of the insert block 548 into the limiting box 547, the guide post at the bottom of the insert block 548 can precisely engage with the alignment groove 5477 on the inner bottom wall of the limiting box 547, achieving automatic alignment and guidance. This greatly simplifies the installation operation, reduces the difficulty and time of manual alignment, and improves installation efficiency. Simultaneously, the engagement of the guide post and the alignment groove 5477 makes the connection of the insert block 548 within the limiting box 547 more stable, effectively preventing loosening or damage due to misalignment. Furthermore, the insertion hole 5481 on the insert block 548 and its internal column provide reliable connection points for components such as the protective cloth 53, further enhancing the structural integrity and functional reliability of the entire protective mechanism 5. Overall, this solution significantly improves the convenience and reliability of right-angle fittings for valve halls and valve towers in UHV converter stations during on-site installation and maintenance.

[0068] Reference Figures 1-8This application further proposes that the turns inside the guide groove 5472 are all designed in a stepped shape to limit the direction of movement of the pull rod 5474. Specifically, the guide groove 5472 is a structure inside the limiting box 547 used to guide the movement of the pull rod 5474. Designing the turns inside as stepped means that these turns are not smooth arc transitions, but are composed of a series of discrete steps with defined angles or planes. This stepped structure provides a segmented guiding path for the movement of the pull rod 5474, ensuring that the pull rod 5474 can move along a preset, controlled trajectory when passing through turns, rather than sliding freely. Through the physical blocking and guiding effect of the steps, the movement of the pull rod 5474 within the guide groove 5472 is no longer arbitrary, but is limited to a specific direction defined by the steps. This effectively prevents the pull rod 5474 from lateral deviation, swinging, or detaching from the guide groove 5472 at turns, thereby ensuring the stability and accuracy of its movement. This limiting effect is crucial to ensuring that the pull rod 5474 can accurately engage with the guide groove 5472 within the slider 5471, and ultimately achieve reliable locking or unlocking of the insert block 548.

[0069] By employing the aforementioned technical solution, the internal bends of the guide groove 5472 are all designed in a stepped shape. This application effectively restricts the direction of movement of the pull rod 5474. The stepped structure provides clear guidance and support, preventing the pull rod 5474 from jamming, deviating from its track, or swaying irregularly during movement. This significantly improves the stability and reliability of the fit between the pull rod 5474 and the guide groove 5472 in the limit box 547, ensuring smoother and more precise locking and unlocking operations of the insertion block 548. Therefore, the adjustment unit 54 of the entire protective mechanism 5 can operate with higher efficiency and safety, effectively ensuring the stability and protective effect of the right-angle fittings of the valve hall and valve tower of the UHV converter station during long-term use.

[0070] Reference Figures 1-8 This application further proposes that the circular ring 52 has multiple through slots, and each through slot can be detachably connected to a U-shaped clamp 541. A hollow fixing rod 542 is fixedly connected to the inner side of the U-shaped clamp 541. A telescopic insertion rod 543 is slidably connected inside the fixing rod 542. A sliding groove is provided on the fixing rod 542. A lever 544 extending to the outside of the fixing rod 542 is fixedly connected to the outer wall of the telescopic insertion rod 543. The lever 544 is located in the sliding groove. A compression spring 545 is fixedly connected between the lever 544 and the fixing rod 542. Both ends of the telescopic insertion rod 543 are inserted into the circular ring 52. One end of the viscoelastic damping rod 546 is rotatably connected to the U-shaped clamp 541.

[0071] Specifically, the circular ring 52 has multiple through slots that provide installation positions for the U-shaped clips 541. Their shape and distribution can be designed according to actual needs to achieve uniform installation of multiple U-shaped clips 541, thus providing multi-point support for the protective fabric 53. Each through slot can be detachably connected to a U-shaped clip 541, a quick-install and detachable connector. Its U-shaped structure fits tightly with the through slot, allowing for detachable connection via snaps, bolts, or other quick-connect methods. This design facilitates the quick installation or removal of related components during maintenance or replacement of the protective fabric 53. A hollow fixing rod 542 is fixedly connected to the inner side of the U-shaped clip 541. The fixing rod 542 is hollow, and its internal space accommodates and guides the telescopic insertion rod 543. The fixed connection between the fixing rod 542 and the U-shaped clip 541 ensures stable positioning on the circular ring 52, providing basic support for the subsequent telescopic adjustment mechanism. A telescopic rod 543 is slidably connected inside the fixed rod 542. The telescopic rod 543 can slide axially inside the fixed rod 542, thereby adjusting its length and facilitating the removal of the U-shaped clamp 541 for quick disassembly of the protective mechanism 5. A sliding groove is provided on the fixed rod 542, which is a guide groove on the outer wall of the fixed rod 542. This groove restricts the movement path of the lever 544, ensuring smooth and accurate operation of the telescopic rod 543. The length and shape of the groove determine the adjustment range of the telescopic rod 543. A lever 544 extending to the outside of the fixed rod 542 is fixedly connected to the outer wall of the telescopic rod 543. The lever 544 is located within the sliding groove and is the actuator for manually operating the telescopic rod 543. Its extension to the outside of the fixed rod 542 allows for adjustment without disassembly. The positioning of the lever 544 within the sliding groove ensures operational stability and prevents misoperation. A compression spring 545 is fixedly connected between the lever 544 and the fixed rod 542. The function of the compression spring 545 is to provide preload or return force. During adjustment, the compression spring 545 ensures that the telescopic rod 543 remains in the set position after the lever 544 is released. Both ends of the telescopic rod 543 are inserted into the ring 52. The ends of the telescopic rod 543 are designed with insertion mechanisms that match the internal structure of the ring 52, such as snaps, flanges, or tapered mating surfaces, to achieve a firm insertion with the ring 52. This insertion method provides support and also facilitates quick installation or disassembly under certain conditions. One end of the viscoelastic damping rod 546 is rotatably connected to the U-shaped clamp 541. The viscoelastic damping rod 546 is a key component of the adjustment unit 54, used to absorb vibration energy and provide flexible support. One end of it is rotatably connected to the U-shaped clamp 541, allowing the viscoelastic damping rod 546 to swing freely within a certain angle range to adapt to the slight deformation or installation angle of the protective cloth 53 under different environmental conditions, while achieving overall connection with the ring 52 through the U-shaped clamp 541.

[0072] Through the above technical solution, multiple through slots are provided inside the ring 52, and each through slot can be detachably connected to a U-shaped clamp 541. One end of the viscoelastic damping rod 546 is rotatably connected to the U-shaped clamp 541. This design allows the viscoelastic damping rod 546 to be flexibly and detachably connected to the ring 52 via the U-shaped clamp 541, greatly simplifying the installation, disassembly, and maintenance process of the protective cloth 53. Overall, this solution not only provides reliable support and damping functions but also significantly improves the operability and maintenance convenience of the protective mechanism 5, effectively solving the problem of flexibility and detachability in the connection between the viscoelastic damping rod 546 and the ring 52, ensuring the stability and functionality of the protective cloth 53 under various working conditions.

[0073] Reference Figure 4 and Figure 8 This application proposes that the outer wall of the viscoelastic damping rod 546 is fixedly connected to a lifting ring 5461, the outer layer of the protective cloth 53 is an insulating layer 531, and its inner layer is a silver-plated fiber mesh 532 to maintain the continuity of electrostatic shielding. Multiple end clips 534 are movably connected to both ends of the protective cloth 53, which are detachably connected to the insertion hole 5481 and the U-shaped clip 541 respectively. Multiple connecting buckles 533 are provided on the protective cloth 53, and the connecting buckles 533 are fastened to the lifting ring 5461.

[0074] Specifically, the lifting ring 5461 is a ring-shaped structure that provides additional suspension and connection points for the protective fabric 53. By securely fixing the lifting ring 5461 to the outer wall of the viscoelastic damping rod 546, the protective fabric 53 can be fastened to the viscoelastic damping rod 546 using the connecting buckle 533. This assists the adjustment unit 54 in adjusting and supporting the protective fabric 53, enhancing the overall structural stability of the protective fabric 53. The lifting ring 5461 can be made of metal or high-strength insulating material and can be fixed by welding, bolting, or integral molding.

[0075] The outer layer of the protective fabric 53 is an insulating layer 531, and its inner layer is a silver-plated fiber mesh 532, used to maintain the continuity of electrostatic shielding. The insulating layer 531, as the outermost layer of the protective fabric 53, primarily functions to provide reliable electrical insulation, effectively isolating the external environment from internal components, preventing electrical breakdown or short circuits, and improving the weather resistance of the protective fabric 53. The silver-plated fiber mesh 532, as the inner layer, utilizes its excellent conductivity to form a continuous conductive surface, thereby achieving effective electrostatic shielding, uniform electric field distribution, avoiding corona discharge caused by localized electric field concentration, and ensuring the continuity and stability of electrostatic shielding under ultra-high voltage operating conditions. The insulating layer 531 can be made of silicone rubber, polytetrafluoroethylene, or special composite insulating materials, while the silver-plated fiber mesh 532 can be woven from highly conductive silver-plated fibers. The two layers can be tightly bonded together through adhesive, sewing, or composite processes.

[0076] Multiple end retaining rings 534 are movably connected to both ends of the protective fabric 53. These end retaining rings 534 are detachably connected to the insertion holes 5481 and U-shaped retaining heads 541, respectively. The end retaining rings 534 are connectors located at both ends of the protective fabric 53, while the insertion holes 5481 and U-shaped retaining heads 541 are the corresponding connection interfaces at both ends of the protective fabric 53. This movable and detachable connection method makes the installation and removal of the protective fabric 53 convenient, facilitating daily maintenance or replacement. At the same time, the movable connection allows the protective fabric 53 to adjust within a certain range according to the slight deformation or thermal expansion and contraction of the fittings, effectively avoiding stress concentration or material tearing that may be caused by rigid connections. The end retaining rings 534 can be made of metal or high-strength engineering plastics and are fixed to the edges of both ends of the protective fabric 53 by means of sewing, riveting, or gluing. They can also be used with the insertion holes 5481 and U-shaped retaining heads 541 using various detachable connection methods such as buckles, pins, Velcro, or zippers.

[0077] The protective fabric 53 is equipped with multiple connecting buckles 533, which are fastened to the lifting rings 5461. The connecting buckles 533 are fasteners used to connect the protective fabric 53 to the lifting rings 5461. The fastening of the connecting buckles 533 to the lifting rings 5461 provides an additional intermediate support point for the protective fabric 53, effectively preventing it from sagging, swaying, or deforming due to its own weight, wind, or other external factors. This ensures that it always maintains its preset shape and position, allowing the insulation layer 531 and the silver-plated fiber mesh 532 to function fully and continuously. The connecting buckles 533 can be in the form of plastic clips, metal snaps, Velcro, or ropes, and can be fixed to the appropriate positions of the protective fabric 53 by sewing, riveting, or gluing.

[0078] Through the above technical solution, the lifting ring 5461 on the outer wall of the viscoelastic damping rod 546 cooperates with the connecting buckle 533 on the protective cloth 53, providing an additional intermediate support point for the protective cloth 53, effectively enhancing the structural stability of the protective cloth 53 and preventing it from sagging or swaying during operation. Meanwhile, the protective cloth 53 adopts a double-layer structure of an outer insulating layer 531 and an inner silver-plated fiber mesh 532. The insulating layer 531 provides reliable electrical insulation protection, while the silver-plated fiber mesh 532 ensures the continuity of electrostatic shielding, effectively suppressing corona discharge and significantly improving the electrical safety performance of the protective cloth 53 under ultra-high voltage environments.

[0079] In the right-angle fittings of the valve hall and valve tower of the UHV converter station, the sliding end 12 and the fixed end 11 of the shunt are key components for current transmission. The current transmission path and the electric field distribution under high voltage are important factors affecting the safe and stable operation of the equipment. If the current transmission path is not designed properly or the electric field is uneven, it may lead to local overheating, corona discharge or even flashover, thus affecting the long-term reliability of the fittings.

[0080] In this regard, this application further proposes that, in the aforementioned fittings, a current-carrying conductor 17 is connected between the sliding end 12 and the fixed end 11 of the nut, and the current-carrying conductor 17 is made of pure aluminum stranded wire. Simultaneously, an equipotential line 16 is installed between the support column 1 and the current-carrying end to prevent arcing during discharge.

[0081] Specifically, the current-carrying conductor 17 is used to transmit large currents between the sliding end 12 and the fixed end 11 of the busbar. In ultra-high voltage environments, the conductor needs to possess excellent conductivity, mechanical strength, and corrosion resistance. Its main function is to provide a stable current path and ensure the continuity of power transmission. Pure aluminum stranded wire is a conductor made of multiple strands of pure aluminum single wires twisted together. Pure aluminum is chosen as the material because it has good conductivity, low density, and relatively economical cost. The stranded structure increases the flexibility of the conductor, making it easy to install and adapt to certain deformations, while also effectively reducing the skin effect and improving the uniformity of current distribution. The equipotential conductor 16 is an auxiliary conductor used in high-voltage equipment to balance potential, suppress local electric field distortion, and prevent corona and flashover. Its main function is to ensure a relatively uniform electric field environment between the support column 1 and the current-carrying end, avoiding partial discharge caused by excessive potential difference. The equipotential conductor 16 is usually made of a metal material with good conductivity and is connected to the components requiring equipotential in an appropriate manner. The installation of an equipotential line 16 between the support column 1 and the current-carrying end means that one end of the equipotential line 16 is connected to the support column 1, and the other end is connected to the current-carrying end (usually the connection point of the sliding end 12 or the fixed end 11 of the tube). Through this connection, the equipotential line 16 can effectively equalize the potential of the support column 1 and the potential of the current-carrying end, thereby eliminating or significantly reducing the potential difference between the two and avoiding partial discharge or flashover under high electric field strength.

[0082] Through the above technical solution, a current-carrying conductor 17 is connected between the sliding end 12 and the fixed end 11 of the busbar, and pure aluminum stranded wire is used as the material for the current-carrying conductor 17, ensuring low loss and high efficiency in ultra-high voltage high current transmission. Pure aluminum stranded wire not only provides excellent conductivity, but its stranded structure also enhances the mechanical flexibility of the conductor, facilitating installation and adapting to minor deformations during operation, while also helping to improve current distribution. Furthermore, installing an equipotential line 16 between the support column 1 and the current-carrying end effectively balances the potential between the support column 1 and the current-carrying end, significantly reducing the local electric field strength, thereby avoiding corona discharge and flashover phenomena that may occur under high-voltage operating conditions. This greatly improves the electrical insulation performance and operational reliability of the fittings, ensuring the safety and stability of the right-angle fittings in the valve hall and valve tower of the ultra-high voltage converter station during long-term operation.

[0083] In some embodiments described above in this application, a right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station is proposed, comprising an insulating sleeve 4 and a protective mechanism 5, wherein a reinforcing sleeve 51 of the protective mechanism 5 wraps around the outside of the insulating sleeve 4 and is detachably connected to the insulating sleeve 4. However, during the connection process between the insulating sleeve 4 and the reinforcing sleeve 51, if the connection method is improper, especially if the metal connectors are exposed, a local electric field concentration may occur at the connection point, thereby triggering a corona discharge phenomenon. This not only affects the insulation performance of the fitting but may also accelerate material aging and reduce the long-term operational reliability of the equipment.

[0084] In this regard, refer to Figures 1-5 This application further proposes a connecting bolt 41 that is fixedly connected between the insulating sleeve 4 and the reinforcing sleeve 51. The connecting bolt 41 is recessed into the insulating sleeve 4 to improve corona protection. The connecting bolt 41 is a commonly used mechanical fastener used to firmly connect the insulating sleeve 4 and the reinforcing sleeve 51 together, ensuring the structural integrity and stability of both. The fixed connection can be achieved by a threaded connection, i.e., by passing the connecting bolt 41 through pre-drilled holes in the insulating sleeve 4 and the reinforcing sleeve 51 and tightening it with a nut, thus achieving reliable mechanical fixation. The recessing of the connecting bolt 41 into the insulating sleeve 4 means that the metal part of the connecting bolt 41, especially its head and threaded portion, is completely or partially covered by the insulating material of the insulating sleeve 4, preventing it from being directly exposed to the external electric field. This recessed design can be achieved by pre-embedding the connecting bolt 41 inside the insulating material during the manufacturing process of the insulating sleeve 4, or by creating countersunk holes on the surface of the insulating sleeve 4 so that the head of the connecting bolt 41 is lower than the surface of the insulating sleeve 4, thereby forming a smooth insulating surface.

[0085] By employing the aforementioned technical solution, the connecting bolt 41 between the insulating sleeve 4 and the reinforcing sleeve 51 is recessed into the insulating sleeve 4, effectively preventing the metal connector from being directly exposed to a high electric field region. Since the tips and edges of metal components are areas where electric fields easily concentrate, recessing them into the insulating material significantly reduces the local electric field strength at the connection point, thereby suppressing corona discharge. This is crucial for right-angle fittings in the valve hall and valve tower of UHV converter stations, as it directly improves the insulation reliability of the fittings, reduces energy loss caused by corona discharge and premature aging of the insulating material, thus extending the service life of the equipment and ensuring the safe and stable operation of the UHV transmission system.

[0086] Reference Figure 4 This application further proposes that an insulating support rod 33 is coaxially fixedly connected inside the sliding end 12 of the tube.

[0087] The insulating support rod 33 is a rod-shaped structure with high insulation performance and sufficient mechanical strength. Its main function is to provide internal support for the sliding end 12 of the tube nut while maintaining electrical insulation, thereby enhancing its overall rigidity and stability.

[0088] Through the above technical solution, an insulating support rod 33 is coaxially fixedly connected inside the sliding end 12 of the tube nut, significantly enhancing the mechanical strength and rigidity of the sliding end 12. This effectively solves the problems of sagging, deformation, and vibration that may occur in the sliding end 12 of the tube nut during long-term operation, ensuring its structural stability. The setting of the insulating support rod 33 enables the sliding end 12 of the tube nut to better resist external stress, maintain precise geometry and electrical clearance, thereby ensuring the reliability of electrical connection and effectively suppressing potential risks such as partial discharge. At the same time, due to the use of insulating material, the insulating support rod 33 does not affect the insulation performance of the sliding end 12 of the tube nut, achieving a harmonious unity between mechanical support and electrical insulation, and improving the safety and service life of the entire right-angle fitting.

[0089] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station, characterized in that, include: A support column (1) has a disc (13) fixedly connected to its outer wall. The shielding ball (2) has a fixed ring (15) fixedly connected to its inner wall, and a plurality of circumferential array connecting rods (14) are connected between the fixed ring (15) and the disc (13). The connector (3) is fixedly connected to the top of the support column (1). The connector (3) is movably connected to a sliding joint (31) and a rotating joint (32). One end of the sliding joint (31) and the rotating joint (32) are respectively connected to the sliding end (12) of the nut and the fixed end (11) of the nut. Insulating sleeves (4) are provided in multiple and are detachably connected to the outside of the sliding end (12) and the fixed end (11) of the tube nut respectively; A protective mechanism (5) is provided between an insulating sleeve (4) and a shielding ball (2). The protective mechanism (5) includes a reinforcing sleeve (51), a ring (52) and a protective cloth (53). The reinforcing sleeve (51) is wrapped around the outside of the insulating sleeve (4) and is detachably connected to the insulating sleeve (4). The ring (52) is integrally connected to the shielding ball (2). The protective cloth (53) is provided between the reinforcing sleeve (51) and the shielding ball (2). An adjustment unit (54) for adjusting and supporting the protective cloth (53) is also provided between the reinforcing sleeve (51) and the shielding ball (2). The adjustment unit (54) includes a viscoelastic damping rod (546). One end of the viscoelastic damping rod (546) is provided with a limit module between it and the reinforcing sleeve (51), and the other end is rotatably connected to the ring (52).

2. The right-angle fitting for the valve hall and valve tower of an ultra-high voltage converter station according to claim 1, characterized in that, The limiting module includes a limiting box (547), of which multiple limiting boxes (547) are arranged in a circumferential array and embedded in a reinforcing sleeve (51). A plug (548) is slidably connected inside the limiting box (547). A fixing ear is provided on the plug (548), and a crossbar (549) is fixedly connected to the fixing ear. One end of a viscoelastic damping rod (546) is rotatably connected to the crossbar (549). A slider (5471) is slidably connected inside the limiting box (547), and a guide groove (5472) is provided inside the slider (5471). A pull rod (5474) is provided inside the limiting box (547), with one end rotatably connected to the limiting box (547) and the other end movably locked in the guide groove (5472). The limiting box (547) is fixedly connected to... There is a fixed post (5475), and a return spring (5473) is connected between the fixed post (5475) and the slider (5471). A hook (5476) is integrally fixedly connected to the slider (5471). A locking groove (5482) adapted to the hook (5476) is opened on the plug (548). A rotating rod (5491) is rotatably connected to one end of the crossbar (549). A traction guide (5492) is wound on the rotating rod (5491). One end of the traction guide (5492) is inserted into the plug (548) and fixedly connected to a paddle (5493) that is slidably connected to the bottom of the plug (548). When the paddle (5493) abuts against the hook (5476), the hook (5476) disengages from the locking groove (5482) and is released from the limit.

3. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 2, characterized in that, The insert (548) has an insertion hole (5481) at one end near the viscoelastic damping rod (546), and a column is fixed in the insertion hole (5481). The bottom wall of the limiting box (547) has an alignment groove (5477), and a guide post that matches the alignment groove (5477) is fixedly connected to the bottom end of the insert (548).

4. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 2, characterized in that, The inside bends of the guide groove (5472) are all designed in a stepped shape to limit the movement direction of the pull rod (5474).

5. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 1, characterized in that, The circular ring (52) has multiple through slots, and each through slot can be detachably connected to a U-shaped clamp (541). A hollow fixed rod (542) is fixedly connected to the inner side of the U-shaped clamp (541). A telescopic rod (543) is slidably connected inside the fixed rod (542). A sliding groove is provided on the fixed rod (542). A lever (544) extending to the outside of the fixed rod (542) is fixedly connected to the outer wall of the telescopic rod (543). The lever (544) is located in the sliding groove. A compression spring (545) is fixedly connected between the lever (544) and the fixed rod (542). Both ends of the telescopic rod (543) are inserted into the circular ring (52). One end of the viscoelastic damping rod (546) is rotatably connected to the U-shaped clamp (541).

6. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 1, characterized in that, The outer wall of the viscoelastic damping rod (546) is fixedly connected to a lifting ring (5461). The outer layer of the protective cloth (53) is an insulating layer (531), and its inner layer is a silver-plated fiber mesh (532) to maintain the continuity of electrostatic shielding. Multiple end clips (534) are movably connected to both ends of the protective cloth (53), which are detachably connected to the insertion hole (5481) and the U-shaped clip (541) respectively. Multiple connecting buckles (533) are provided on the protective cloth (53), and the connecting buckles (533) are fastened to the lifting ring (5461).

7. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 1, characterized in that, A current-carrying wire (17) is connected between the sliding end (12) and the fixed end (11) of the tube. The current-carrying wire (17) is made of pure aluminum stranded wire. An equipotential line (16) is installed between the support column (1) and the current-carrying end.

8. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 1, characterized in that, A connecting bolt (41) is fixedly connected between the insulating sleeve (4) and the reinforcing sleeve (51), and the connecting bolt (41) is recessed into the insulating sleeve (4).

9. A right-angle fitting for a valve hall and valve tower of an ultra-high voltage converter station according to claim 1, characterized in that, An insulating support rod (33) is coaxially fixedly connected inside the sliding end (12) of the tube.

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