Flow guide fitting with four-phase independent rotational joints
By using a four-phase independent rotating joint structure and wear-resistant shims, the flexibility and wear issues of the current guiding hardware in the adjustment of the four-phase busbar are solved, achieving efficient spatial layout adaptability and electrical connection stability, and improving the vibration resistance and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANJING LINE ACCESSORIES MFG
- Filing Date
- 2026-02-14
- Publication Date
- 2026-05-12
AI Technical Summary
Existing current guiding hardware is insufficient to meet the independent spatial orientation adjustment requirements of four-phase busbars. Its rotational flexibility and adaptability are poor, resulting in cumbersome operation, high maintenance costs, and easy mechanical fatigue and corona discharge.
A four-phase independent rotating joint structure was designed, including four joints that can rotate independently in multiple directions at large angles. Combined with wear-resistant spacers and fixed/sliding connecting rod assemblies, the anti-halo ball and tube connection design was optimized to achieve independent spatial orientation adjustment of the four-phase tube.
It improves the structural adaptability and rotational flexibility of the multiphase bus system, reduces wear, enhances vibration resistance, reduces equipment load and the risk of corona discharge, and improves power transmission quality and equipment life.
Smart Images
Figure CN122026262A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of current guiding fittings for battery swapping stations, specifically a current guiding fitting with four independent rotating joints. Background Technology
[0002] Compared to AC transmission, DC transmission dominates in long-distance, high-capacity power transmission, grid interconnection, renewable energy grid integration, and submarine / underground power transmission due to its advantages such as higher transmission efficiency, lower energy loss, greater economic efficiency, and more flexible operation. It is also the core choice for ultra-high-voltage converter stations and inter-regional power grid construction. DC converter stations are the core hubs in DC transmission, playing a crucial role in AC-DC conversion. The hardware within the station, while serving as current conductors or mechanical connections between various devices, must also possess sufficient independent flexibility and vibration resistance to reduce potential damage to equipment caused by vibration and installation errors, such as bending moments and load-bearing capacity.
[0003] The current-conducting fittings in the converter station are key components for realizing current conduction and spatial connection between tubular busbars (referred to as tube busbars). Their structural rationality directly affects the operational stability, power transmission efficiency, and corona suppression effect of the converter station. With the continuous increase in the capacity of HVDC converter stations, the requirements for the flexibility of tube busbar connections, adaptability to multi-phase layout, and anti-corona performance are becoming increasingly stringent.
[0004] Existing current-guiding fittings often employ fixed connection structures or single rotating joint designs, making it difficult to simultaneously meet the independent spatial orientation adjustment requirements of four-phase busbars. For example, traditional current-guiding fittings typically bind multi-phase busbars as a fixed unit. When the layout within the converter station changes or the spatial position of the busbars needs optimization, the entire unit must be disassembled and reinstalled. This not only results in cumbersome operation and high maintenance costs but also increases the risk of mechanical fatigue due to uneven stress on the busbars. Furthermore, some current-guiding fittings with rotating joints can only achieve rotation in one direction or at a limited angle, failing to flexibly adapt to the horizontal and vertical cross-shaped distribution of four-phase busbars or other complex layouts. Additionally, the matching of the anti-corona bulb's opening position with the busbar connection orientation is poor, easily leading to corona discharge under high voltage, affecting power transmission quality and equipment lifespan. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a flow guide fitting with four independent rotating joints. By configuring four joint structures that can independently achieve multi-directional large-angle rotation and optimizing the opening design of the anti-halo ball and the connection part of the tube, it solves the technical problem that existing flow guide fittings cannot simultaneously meet the independent spatial orientation adjustment requirements of four-phase tubes, and have poor adaptability and rotational flexibility.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a flow guiding fitting with four independent rotating joints, comprising a circular shaft, wherein a first U-shaped rotating joint, a second U-shaped rotating joint, a first irregular rotating joint, and a second irregular rotating joint are nested and installed on the outer circumference of the circular shaft, and wear-resistant spacers are provided on the rotating contact surfaces between each pair of these four rotating joints; a fixed connecting rod assembly or a sliding connecting rod assembly is respectively installed at the outer ends of the first U-shaped rotating joint, the second U-shaped rotating joint, the first irregular rotating joint, and the second irregular rotating joint; the outer end of the fixed connecting rod assembly is fixedly connected to a pipe clamp fitting, and the outer end of the sliding connecting rod assembly is slidably connected to the pipe clamp fitting; the flow guiding fitting is suspended by a suspension assembly installed at the upper end of the circular shaft, or the flow guiding fitting is supported by a support assembly installed at the lower end of the circular shaft.
[0007] Furthermore, the first U-shaped rotating joint is welded together from a first U-shaped plate and a first ear-shaped connecting plate. The first U-shaped plate has symmetrically provided first mounting holes at its upper and lower ends, and the first ear plate has a first ear plate through hole. The opening direction of the first mounting hole is perpendicular to the opening direction of the first ear plate through hole. The second U-shaped rotating joint is welded together from a second U-shaped plate and a second ear-shaped connecting plate. The second U-shaped plate has symmetrically provided second mounting holes at its upper and lower ends, and the second ear plate has a second ear plate through hole. The opening direction of the second mounting hole is perpendicular to the opening direction of the second ear plate through hole. The outer distance of the U-shaped opening of the first U-shaped plate is greater than the inner distance of the U-shaped opening of the second U-shaped plate.
[0008] Furthermore, both the first and second irregularly shaped rotating joints are integrally formed parts. One end of the first irregularly shaped rotating joint is machined into a semi-circular plate, and the sides of the semi-circular plate are symmetrically machined into a pair of first circular plates. A first circular hole is formed in the center of the semi-circular plate, and a second circular hole is formed aligned in the center of the two first circular plates. The opening direction of the first circular hole is perpendicular to the opening direction of the two second circular holes. One end of the second irregularly shaped rotating joint is machined into a second circular plate, and a long strip semi-circular plate is vertically machined on the outer circumference of the second circular plate. A third circular hole is formed in the center of the second circular plate, and a fourth circular hole is formed in the center of the semi-circular area of the long strip semi-circular plate. The opening direction of the third circular hole is perpendicular to the opening direction of the fourth circular hole.
[0009] Furthermore, the fixed connecting rod assembly includes a fixed connecting rod, one end of which is fixedly connected to a first double-side plate connecting support, and the other end of which is fixedly connected to a fixed sleeve. A pair of fifth circular holes are aligned on both sides of the first double-side plate connecting support. The fixed connecting rod assembly is bolted to the first U-shaped plate of the first U-shaped rotating joint, the second U-shaped plate of the second U-shaped rotating joint, the semi-circular plate of the first irregular rotating joint, or the elongated semi-circular plate of the second irregular rotating joint through the first double-side plate connecting support.
[0010] Furthermore, by inserting the pipe nut clamp into the inside of the fixing sleeve, the pipe nut and the fixing connecting rod assembly can be fixedly connected.
[0011] Furthermore, the sliding connecting rod assembly includes a sliding connecting rod, one end of which is fixedly connected to a second double-side plate connecting support, a sliding sleeve is slidably fitted onto the sliding connecting rod, and the other end of the sliding connecting rod is fixedly connected to a supporting slide plate. A pair of sixth circular holes are aligned on both sides of the second double-side plate connecting support. The sliding connecting rod assembly is bolted to the first U-shaped plate of the first U-shaped rotating joint, the second U-shaped plate of the second U-shaped rotating joint, the semi-circular plate of the first irregular rotating joint, or the elongated semi-circular plate of the second irregular rotating joint through the second double-side plate connecting support.
[0012] Furthermore, by inserting the pipe nut clamp into the inner side of the sliding sleeve, the pipe nut can slide axially along the sliding connecting rod, that is, the pipe nut and the sliding connecting rod assembly are slidably connected; the support slide is installed on the inner wall of the pipe nut and is used to support the inner wall of the pipe nut when the pipe nut slides axially.
[0013] Furthermore, the suspension assembly includes a connecting plate, a connecting support is fixedly disposed on the upper part of the connecting plate, a connecting sleeve is fixedly disposed on the lower part of the connecting plate, the round shaft is fixedly inserted into the connecting sleeve, and the connecting support is connected to the suspension insulator by bolts, that is, the current-conducting hardware is suspended and installed below the suspension insulator through the suspension assembly.
[0014] Furthermore, the support assembly includes a chassis, on which a support sleeve is fixedly mounted. Multiple stiffeners are fixedly mounted between the outer circumferential surface of the support sleeve and the chassis. The circular shaft is fixedly inserted into the support sleeve. The bottom surface of the chassis is mounted on the post insulator. That is, the current-conducting hardware is supported and mounted above the post insulator by the support assembly.
[0015] Furthermore, the wear-resistant spacer is an annular thin sheet made of non-metallic wear-resistant material; the wear-resistant spacer is respectively embedded between the rotational contact surfaces of the first U-shaped rotating joint and the second U-shaped rotating joint, the rotational contact surface of the second U-shaped rotating joint and the first irregular rotating joint, and the rotational contact surface of the first irregular rotating joint and the second irregular rotating joint.
[0016] Furthermore, the flow guiding hardware is fitted with an anti-halo ball. The first U-shaped rotating joint, the second U-shaped rotating joint, the first irregular rotating joint, and the second irregular rotating joint are respectively connected to a tube nut through a fixed connecting rod assembly or a sliding connecting rod assembly and a tube nut clamp hardware. The four tube nuts are arranged in a cross shape with horizontal and vertical alignment, or each tube nut can be independently rotated and adjusted according to the layout within the converter station, thereby adjusting the corresponding opening position on the anti-halo ball accordingly.
[0017] Compared with the prior art, the present invention provides a flow guide fitting with four-phase independent rotation joints, which has the following beneficial effects: 1. Existing commonly used current-guiding hardware designs typically suffer from insufficient rotational freedom. Generally, they can only allow two-phase busbars to rotate independently when connected to the same point, or, when three-phase busbars are connected to the same point, allow two phases to rotate synchronously while the other rotates independently. They cannot support independent rotation of three-phase or four-phase busbars at the same connection point. To address this technical bottleneck, this invention, through an innovative structural design, successfully enables each phase of a four-phase busbar to rotate independently when connected to the same node. Specifically, this structure allows the installed four-phase busbars to rotate freely around the same circular axis within a range of at least 45° simultaneously and without interference. This significantly enhances the structural adaptability and rotational flexibility of the multi-phase busbar system at the same point, making it particularly suitable for complex electrical connection applications with high requirements for spatial arrangement and thermal expansion / contraction compensation.
[0018] 2. This invention fully considers the wear during rotation of the first U-shaped rotating joint 1, the second U-shaped rotating joint 2, the first irregular rotating joint 3, and the second irregular rotating joint 4. Wear-resistant non-metallic pads are designed between the contact friction surfaces of the four joints, optimizing the rotational friction mode. The hard-hard friction with a large coefficient of friction between harder metal materials is changed to soft-hard friction with a smaller coefficient of friction between softer non-metallic wear-resistant materials and harder metal materials. This reduces the wear on the metal parts of the entire rotating joint during operation and improves its service life.
[0019] 3. In this invention, each rotating joint is used to connect the four-phase busbar. It is installed onto each rotating joint via a fixed connecting rod assembly or a sliding connecting rod assembly. The connection between the two is a bolted assembly, which can be freely and flexibly combined into a sliding or fixed connection according to the installation layout within the station. Because the fixed or sliding connecting rod is perpendicular to the connecting steering axis of each rotating joint, the four-phase busbar can rotate left and right around the circular axis in the horizontal plane, and also rotate up and down around the mounting bolts in the vertical plane. This multi-directional independent rotation structure can absorb the expansion and contraction and vibration of the multi-phase busbar in both horizontal and vertical directions, minimizing the additional load and bending moment on the equipment, better protecting the equipment, and improving vibration resistance. Attached Figure Description
[0020] Figure 1 This is a perspective view of a flow guide fitting suspension method with four independent rotating joints according to the present invention; Figure 2 for Figure 1 Remove the anti-sickness ball from the 3D image; Figure 3 for Figure 2 A three-dimensional view excluding the nut, nut clamp hardware, and suspension insulator; Figure 4 for Figure 3 Assembly perspective view of the central suspension assembly and the round shaft; Figure 5 for Figure 3 Assembly perspective view of each rotating joint; Figure 6 for Figure 5 A stereoscopic view from another perspective; Figure 7 for Figure 5 A three-dimensional view of the first U-shaped rotational joint in the middle; Figure 8 for Figure 5 A three-dimensional view of the second U-shaped rotational joint in the middle; Figure 9 for Figure 5 A three-dimensional view of the first irregular rotating joint in the middle; Figure 10 for Figure 5 A three-dimensional view of the second irregular rotational joint in the middle; Figure 11 for Figure 5 3D view of the wear-resistant septum; Figure 12 for Figure 3 A perspective view of the fixed connecting rod assembly; Figure 13 for Figure 3 A perspective view of the sliding connecting rod assembly; Figure 14This is a perspective view of a flow guide fitting support method with four independent rotation joints according to the present invention. Figure 15 for Figure 14 Remove the anti-sickness ball from the 3D image; Figure 16 for Figure 14 A three-dimensional view excluding the ferrule, ferrule clamp fittings, and post insulator; Figure 17 for Figure 14 A 3D view of the supporting components; In the diagram: 1. First U-shaped rotary joint; 101. First U-shaped plate; 102. First ear-shaped connecting plate; 103. First mounting hole; 104. First ear plate through hole; 2. Second U-shaped rotary joint; 201. Second U-shaped plate; 202. Second ear-shaped connecting plate; 203. Second mounting hole; 204. Second ear plate through hole; 3. First irregular rotary joint; 301. Semi-circular plate; 302. First circular plate; 303. First circular hole; 304. Second circular hole; 4. Second irregular rotary joint; 401. Second circular plate; 402. Long strip semi-circular plate; 403. Third circular hole; 404. Fourth circular hole; 5. Round shaft; 6. Wear-resistant material. 7. Spacing pad; 8. Fixed connecting rod assembly; 701. Fixed connecting rod; 702. First double-side plate connecting support; 703. Fixed sleeve; 704. Fifth circular hole; 9. Sliding connecting rod assembly; 801. Sliding connecting rod; 802. Second double-side plate connecting support; 803. Sliding sleeve; 804. Support slide; 805. Sixth circular hole; 10. Pipe clamp hardware; 11. Suspension assembly; 12. Connecting plate; 13. Connecting support; 14. Connecting sleeve; 15. Support assembly; 16. Base plate; 17. Support sleeve; 18. Rib plate; 19. Pipe; 10. Suspension insulator; 11. Post insulator; 12. Anti-halo ball. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example
[0022] Please see Figure 1-13This invention provides a flow guide fitting with four-phase independent rotating joints, comprising a circular shaft 5. A first U-shaped rotating joint 1, a second U-shaped rotating joint 2, a first irregularly shaped rotating joint 3, and a second irregularly shaped rotating joint 4 are sequentially nested on the outer circumference of the circular shaft 5. This nesting design allows each rotating joint to rotate independently around the circular shaft 5, achieving four-phase independent motion. Furthermore, wear-resistant spacers 6 are provided on the rotating contact surfaces between every two rotating joints to reduce friction and wear. The wear-resistant spacers 6 are annular thin sheets made of high-performance non-metallic wear-resistant materials such as polytetrafluoroethylene or engineering plastics, possessing excellent wear resistance and self-lubricating properties, effectively extending their service life.
[0023] The outer ends of the first U-shaped rotating joint 1, the second U-shaped rotating joint 2, the first irregular rotating joint 3, and the second irregular rotating joint 4 are respectively equipped with a fixed connecting rod assembly 7 or a sliding connecting rod assembly 8. The fixed connecting rod assembly 7 is used for rigid connection to ensure stability, and its outer end is fixedly connected to the pipe nut clamp 9. The sliding connecting rod assembly 8 allows a certain displacement to adapt to thermal expansion and contraction or mechanical stress, and its outer end is slidably connected to the pipe nut clamp 9. These connection methods ensure a reliable connection with the pipe nut 12.
[0024] Anti-corona ball 15 is installed on the current guiding hardware to equalize voltage and prevent corona discharge. The first U-shaped rotating joint 1, the second U-shaped rotating joint 2, the first irregular rotating joint 3, and the second irregular rotating joint 4 are connected to a tube nut 12 respectively through the fixed connecting rod assembly 7 or the sliding connecting rod assembly 8 and the tube nut clamp hardware 9. The four tube nuts 12 can be arranged in a cross shape with horizontal and vertical lines, or the spatial orientation of the tube nuts 12 can be adjusted by independently rotating each joint according to the layout requirements of the converter station, thereby adjusting the corresponding opening position on the anti-corona ball 15 to ensure uniform electric field distribution and improve system safety and reliability.
[0025] In the above embodiments, the first U-shaped rotating joint 1 is welded together from a first U-shaped plate 101 and a first ear-shaped connecting plate 102. The first U-shaped plate 101 has symmetrical first mounting holes 103 at its upper and lower ends, and the first ear plate 102 has a first ear plate through hole 104. The opening direction of the first mounting hole 103 is perpendicular to the opening direction of the first ear plate through hole 104. The second U-shaped rotating joint 2 is welded together from a second U-shaped plate 201 and a second ear-shaped connecting plate 202. The second U-shaped plate 201 has symmetrical second mounting holes 203 at its upper and lower ends, and the second ear plate 202 has a second ear plate through hole 204. The opening direction of the second mounting hole 203 is perpendicular to the opening direction of the second ear plate through hole 204. The outer distance of the U-shaped opening of the first U-shaped plate 101 is greater than the inner distance of the U-shaped opening of the second U-shaped plate 201. The first mounting hole 103, the first ear plate through hole 104, the second mounting hole 203, and the second ear plate through hole 204 are used for the installation and connection of corresponding components.
[0026] In the above embodiments, the first irregular rotating joint 3 and the second irregular rotating joint 4 are both integrally formed parts. One end of the first irregular rotating joint 3 is processed into a semi-circular plate 301. The sides of the semi-circular plate 301 are symmetrically processed into a pair of first circular plates 302. A first circular hole 303 is opened in the center of the semi-circular plate 301. A second circular hole 304 is opened in the center of the two first circular plates 302. The opening direction of the first circular hole 303 is perpendicular to the opening direction of the two second circular holes 304. One end of the second irregular rotating joint 4 is processed into a second circular plate 401. A long strip semi-circular plate 402 is vertically processed on the outer circumferential surface of the second circular plate 401. A third circular hole 403 is opened in the center of the second circular plate 401. A fourth circular hole 404 is opened in the center of the semi-circular area of the long strip semi-circular plate 402. The opening direction of the third circular hole 403 is perpendicular to the opening direction of the fourth circular hole 404. The first circular hole 303, the second circular hole 304, the third circular hole 403, and the fourth circular hole 404 are used for the installation and connection of corresponding components.
[0027] In the above-described embodiments, the fixed connecting rod assembly 7 includes a fixed connecting rod 701. One end of the fixed connecting rod 701 is fixedly connected to a first double-side plate connecting support 702, and the other end of the fixed connecting rod 701 is fixedly connected to a fixed sleeve 703. A pair of fifth circular holes 704 are aligned on both sides of the first double-side plate connecting support 702 for bolt connection and fixation of each rotating joint.
[0028] The fixed connecting rod assembly 7 is bolted to the first U-shaped plate 101 of the first U-shaped rotating joint 1, the second U-shaped plate 201 of the second U-shaped rotating joint 2, the semi-circular plate 301 of the first irregular rotating joint 3, or the elongated semi-circular plate 402 of the second irregular rotating joint 4 via the first double-sided plate connecting support 702. In actual assembly, the fixed connection between the pipe nut 12 and the fixed connecting rod assembly 7 can be achieved simply by inserting the pipe nut clamp 9 into the inside of the fixing sleeve 703.
[0029] In the above embodiment, the sliding connecting rod assembly 8 includes a sliding connecting rod 801, one end of which is fixedly connected to a second double-side plate connecting support 802, and the other end is fixedly mounted with a supporting slide plate 804. A sliding sleeve 803 that can slide freely along the rod axis is fitted onto the sliding connecting rod 801. The second double-side plate connecting support 802 has a pair of sixth circular holes 805 at symmetrical positions on both sides for bolt connection and fixation of each rotating joint.
[0030] The sliding connecting rod assembly 8 is bolted to the first U-shaped plate 101 of the first U-shaped rotating joint 1, the second U-shaped plate 201 of the second U-shaped rotating joint 2, the semi-circular plate 301 of the first irregular rotating joint 3, or the long strip semi-circular plate 402 of the second irregular rotating joint 4 via the second double-side plate connecting support 802, thus possessing strong structural adaptability and installation flexibility.
[0031] In actual assembly, simply inserting the nut clamp 9 into the inner side of the sliding sleeve 803 allows the nut 12 to slide freely axially along the sliding connecting rod 801, thus achieving a sliding connection between the nut 12 and the sliding connecting rod assembly 8. The support slide 804 is placed in the inner wall of the nut 12, providing auxiliary support during axial sliding of the nut and helping to maintain the structural stability and smooth movement of the nut.
[0032] In the above embodiment, the current-guiding hardware is suspended by a suspension assembly 10 mounted on the upper end of the circular shaft 5. The suspension assembly 10 includes a disc-shaped connecting plate 1001, which is typically made of high-strength forged steel with an anti-corrosion surface treatment. A connecting support 1002 is fixedly mounted on the upper part of the connecting plate 1001. This support is a cast steel component with mounting lugs having threaded holes. A connecting sleeve 1003 is vertically fixedly mounted below the connecting plate 1001. This sleeve is a thick-walled cylindrical structure, and its inner hole is interference-fitted with the circular shaft 5. The circular shaft 5 is precisely pressed into and fixedly inserted into the connecting sleeve 1003 to achieve torque transmission and axial positioning. The connecting support 1002 is connected to the lower flange of the suspension insulator 13 by a high-strength bolt assembly. The entire connection part is equipped with anti-loosening washers and tightened to the specified torque. Therefore, the current-guiding hardware is reliably suspended and mounted below the suspension insulator 13 by the suspension assembly 10, forming a stable suspension structure system. Example
[0033] Please see Figure 14-17 The difference between this embodiment and Embodiment 1 lies in the installation method of the flow guiding hardware. The flow guiding hardware is supported and installed via a support assembly 11 mounted on the lower end of the circular shaft 5. The support assembly 11 includes a robust base 1101, which is typically made of sheet metal and possesses sufficient rigidity and strength to withstand the load of the superstructure. A vertical support sleeve 1102 is fixedly installed at the center of the upper surface of the base 1101. The inner diameter of this sleeve matches the diameter of the circular shaft 5 for precise installation and positioning. To enhance the stability of the support sleeve 1102 and distribute the stress, multiple stiffening plates 1103 are uniformly fixed between the outer circumferential surface of the support sleeve 1102 and the upper surface of the base 1101. These stiffening plates are connected by welding or integral molding, effectively preventing the sleeve from deforming or tilting under stress.
[0034] The lower end of the circular shaft 5 is securely inserted and fixed inside the support sleeve 1102, typically through bolt tightening or welding for permanent connection. An installation interface is provided on the bottom surface of the chassis 1101 for mounting the entire support assembly 11 onto the top flange of the post insulator 14, usually secured with bolts to ensure structural stability and reliability. In this way, the current-conducting hardware is supported and installed above the post insulator 14 via the support assembly 11, forming a stable electrical equipment connection structure that meets both mechanical strength requirements and ensures reliable electrical connections.
[0035] In summary, combining embodiments 1 and 2, the working principle of the current guiding hardware of the present invention is as follows: During use, the suspension assembly 10 or the support assembly 11 is selected according to the installation requirements of the converter station to complete the suspension or support installation and fixation of the current guiding hardware. The four independent rotating joints, namely the first U-shaped rotating joint 1, the second U-shaped rotating joint 2, the first irregular rotating joint 3, and the second irregular rotating joint 4, can rotate independently around the circular axis 5. The operator adjusts the angle of each joint to adjust the four tube nuts 12 to a suitable spatial position according to the actual layout requirements, ensuring a uniform electric field distribution. The fixed connecting rod assembly 7 achieves a rigid connection of the tube nuts 12, ensuring structural stability; the sliding connecting rod assembly 8 allows the tube nuts to slide freely along the axial direction, effectively offsetting the displacement and mechanical stress caused by thermal expansion and contraction, and preventing damage to the tube nuts or hardware due to stress concentration. The anti-corona ball 15 uniformly distributes the electric field, preventing corona discharge and further improving the safety of the electrical system. The wear-resistant spacers 6 between each rotating joint reduce friction and wear, extending the service life of the hardware. The overall structure achieves stable flow guidance and optimized spatial layout between the tubes through independent rotation adjustment, flexible connection and adaptation, and reliable electrical protection, ensuring the long-term reliable operation of the electrical equipment in the converter station.
[0036] It should be noted that the suspension insulator 13 and the post insulator 14 in the attached drawings are simplified drawings, and only a section of the four-phase busbar is shown for illustration. These are not innovative points of the present invention, so the attached drawings are simplified illustrations.
[0037] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A flow guide fitting with four-phase independent rotation joints, comprising a round shaft (5), characterized in that: The outer circumference of the circular shaft (5) is intricately fitted with a first U-shaped rotating joint (1), a second U-shaped rotating joint (2), a first irregular rotating joint (3), and a second irregular rotating joint (4), as well as wear-resistant pads (6) on the rotating contact surfaces between each of these four rotating joints; the outer ends of the first U-shaped rotating joint (1), the second U-shaped rotating joint (2), the first irregular rotating joint (3), and the second irregular rotating joint (4) are respectively fitted with a fixed connecting rod assembly (7) or a sliding connecting rod assembly (8); the outer end of the fixed connecting rod assembly (7) is fixedly connected to the pipe clamp fitting (9), and the outer end of the sliding connecting rod assembly (8) is slidably connected to the pipe clamp fitting (9); the flow guiding fitting is suspended by a suspension assembly (10) installed at the upper end of the circular shaft (5), or the flow guiding fitting is supported by a support assembly (11) installed at the lower end of the circular shaft (5).
2. A flow guide fitting with four-phase independent rotation joints according to claim 1, characterized in that: The first U-shaped rotating joint (1) is welded together from a first U-shaped plate (101) and a first ear-shaped connecting plate (102). The first U-shaped plate (101) has first mounting holes (103) symmetrically opened at its upper and lower ends. The first ear plate (102) has a first ear plate through hole (104). The opening direction of the first mounting hole (103) is perpendicular to the opening direction of the first ear plate through hole (104). The second U-shaped rotating joint (2) is welded from the second U-shaped plate (201) and the second ear-shaped connecting plate (202). The upper and lower ends of the second U-shaped plate (201) are symmetrically provided with second mounting holes (203). The second ear plate (202) is provided with a second ear plate through hole (204). The opening direction of the second mounting hole (203) is perpendicular to the opening direction of the second ear plate through hole (204). The outer distance of the U-shaped opening of the first U-shaped plate (101) is greater than the inner distance of the U-shaped opening of the second U-shaped plate (201).
3. A flow guide fitting with four-phase independent rotation joints according to claim 2, characterized in that: The first irregular rotating joint (3) and the second irregular rotating joint (4) are both integrally formed parts. One end of the first irregular rotating joint (3) is processed into a semi-circular plate (301). The sides of the semi-circular plate (301) are symmetrically processed into a pair of first circular plates (302). A first circular hole (303) is provided in the center of the semi-circular plate (301). A second circular hole (304) is provided aligned in the center of the two first circular plates (302). The opening direction of the first circular hole (303) is perpendicular to the opening direction of the two second circular holes (304). One end of the second irregular rotating joint (4) is processed into a second type of circular plate (401). A long strip semi-circular plate (402) is vertically processed on the outer circumferential surface of the second type of circular plate (401). A third circular hole (403) is opened in the center of the second type of circular plate (401). A fourth circular hole (404) is opened in the center of the semi-circular area of the long strip semi-circular plate (402). The opening direction of the third circular hole (403) is perpendicular to the opening direction of the fourth circular hole (404).
4. A flow guide fitting with four-phase independent rotation joints according to claim 3, characterized in that: The fixed connecting rod assembly (7) includes a fixed connecting rod (701), one end of which is fixedly connected to a first double-side plate connecting support (702), and the other end of which is fixedly connected to a fixed sleeve (703). A pair of fifth circular holes (704) are aligned on both sides of the first double-side plate connecting support (702). The fixed connecting rod assembly (7) is bolted to the first U-shaped plate (101) of the first U-shaped rotating joint (1), the second U-shaped plate (201) of the second U-shaped rotating joint (2), the semi-circular plate (301) of the first irregular rotating joint (3), or the long strip semi-circular plate (402) of the second irregular rotating joint (4) through the first double-side plate connecting support (702).
5. A flow guide fitting with four-phase independent rotation joints according to claim 4, characterized in that: By inserting the nut clamp (9) into the inside of the fixing sleeve (703), the nut (12) and the fixing connecting rod assembly (7) can be fixedly connected.
6. A flow guide fitting with four-phase independent rotation joints according to claim 3, characterized in that: The sliding connecting rod assembly (8) includes a sliding connecting rod (801), one end of which is fixedly connected to a second double-side plate connecting support (802), a sliding sleeve (803) is slidably fitted on the sliding connecting rod (801), and the other end of which is fixedly connected to a supporting slide plate (804). A pair of sixth circular holes (805) are aligned on both sides of the second double-side plate connecting support (802). The sliding connecting rod assembly (8) is bolted to the first U-shaped plate (101) of the first U-shaped rotating joint (1), the second U-shaped plate (201) of the second U-shaped rotating joint (2), the semi-circular plate (301) of the first irregular rotating joint (3), or the long strip semi-circular plate (402) of the second irregular rotating joint (4) through the second double-side plate connecting support (802).
7. A flow guide fitting with four-phase independent rotation joints according to claim 6, characterized in that: The nut clamp (9) can be inserted into the inner side of the sliding sleeve (803) to realize the axial sliding of the nut (12) along the sliding connecting rod (801), that is, the nut (12) and the sliding connecting rod assembly (8) are slidably connected; the support slide (804) is installed on the inner wall of the nut (12) and is used to support the inner wall of the nut (12) when the nut (12) slides axially.
8. A flow guide fitting with four-phase independent rotation joints according to claim 1, characterized in that: The suspension assembly (10) includes a connecting plate (1001), a connecting support (1002) is fixedly provided on the top of the connecting plate (1001), a connecting sleeve (1003) is fixedly provided on the bottom of the connecting plate (1001), the round shaft (5) is fixedly inserted into the connecting sleeve (1003), and the connecting support (1002) is connected to the suspension insulator (13) by bolts. That is, the current guiding hardware is suspended and installed below the suspension insulator (13) through the suspension assembly (9).
9. A flow guide fitting with four-phase independent rotation joints according to claim 1, characterized in that: The support assembly (11) includes a chassis (1101), on which a support sleeve (1102) is fixedly installed. Multiple stiffeners (1103) are fixedly installed between the outer circumferential surface of the support sleeve (1102) and the chassis (1101). The round shaft (5) is fixedly inserted into the support sleeve (1102). The bottom surface of the chassis (1101) is installed on the post insulator (14). That is, the current-conducting hardware is supported and installed above the post insulator (14) by the support assembly (10).
10. A flow guide fitting with four-phase independent rotation joints according to claim 1, characterized in that: The wear-resistant pad (6) is an annular thin sheet made of non-metallic wear-resistant material; the wear-resistant pad (6) is respectively embedded between the rotation contact surfaces of the first U-shaped rotating joint (1) and the second U-shaped rotating joint (2), the rotation contact surface of the second U-shaped rotating joint (2) and the first irregular rotating joint (3), and the rotation contact surface of the first irregular rotating joint (3) and the second irregular rotating joint (4).
11. A flow guide fitting with four-phase independent rotation joints according to claim 1, characterized in that: The flow guide fitting is fitted with an anti-halo ball (15). The first U-shaped rotating joint (1), the second U-shaped rotating joint (2), the first irregular rotating joint (3), and the second irregular rotating joint (4) are connected to a tube nut (12) respectively through a fixed connecting rod assembly (7) or a sliding connecting rod assembly (8) and a tube nut clamp fitting (9). The four tube nuts (12) are arranged in a cross shape with horizontal and vertical lines, or each tube nut (12) can be independently rotated and adjusted according to the layout of the converter station, thereby adjusting the corresponding opening position on the anti-halo ball (15).