A quick-mounting shielding ball for a converter station fitting

Abstract

The application discloses a quick-mounting shielding ball for a converter station fitting, which comprises a mounting seat, a shielding shell fixedly installed at the upper end of the mounting seat, a lower shell, an adjusting shell and an upper shell, wherein the outer surfaces of the lower shell, the adjusting shell and the upper shell are smoothly connected, a driving bevel gear is fixedly installed on the inner wall of the adjusting shell, a driven bevel gear is uniformly rotationally assembled on the inner wall of the upper shell, an adjusting structure is fixedly installed on the inner end of the driven bevel gear, a self-locking structure is assembled on the output end of the adjusting structure, a sliding rail structure is uniformly fixedly installed on the inner wall of the lower shell, and a connecting structure is used for connecting the fitting and the shielding shell. In the application, the outer surface of the shielding shell forms a smooth spherical surface without sharp edges and corners. When the spherical surface is in equipotential with the high-voltage fitting through the internal connecting structure, the smooth and continuous surface can maximize the homogenization of the electric field distribution on the surface, effectively reduce the maximum electric field intensity on the surface to below the critical corona onset field intensity of air, thereby inhibiting the generation of corona, and the shielding effect is better.

Description

Technical Field

[0001] This invention belongs to the field of shielding ball technology, and specifically provides a quick-install shielding ball for converter station fittings. Background Technology

[0002] In high-voltage direct current (HVDC) converter stations, exposed busbar ends, flexible conductor terminals, and other hardware connection points, due to their sharp geometric shapes and small radii of curvature, experience severe electric field concentration under high-voltage electric fields, leading to corona discharge and radio interference. This is particularly severe with large-diameter busbars, where the electric field distortion is especially pronounced at the open pipe openings and end flange areas. This not only causes energy loss and ozone corrosion of equipment, but the electromagnetic noise also interferes with the normal operation of communication and electronic equipment within and around the station.

[0003] To suppress corona discharge, shielding spheres or rings are often installed in critical areas during engineering projects. However, existing shielding devices typically have the following shortcomings: First, the installation process is complex, often requiring multiple bolts for fastening or segmented assembly, which is extremely inconvenient for high-altitude operations in confined spaces like high-voltage equipment areas, resulting in low installation efficiency and safety hazards. Second, they lack versatility; a single type of shielding sphere often only fits specific sizes of fittings. Furthermore, the design of many shielding devices fails to adequately consider the needs of electric field optimization, with seams, edges, or discontinuities on the surface. These areas can become new points of electric field concentration, weakening the shielding effect and potentially even inducing partial discharge. Therefore, there is an urgent need for a shielding device that can be installed quickly, reliably self-locking, with an optimized electric field distribution, and good heat dissipation. Summary of the Invention

[0004] To address the aforementioned issues of complex installation, poor versatility, and insufficient shielding effectiveness, and to achieve rapid installation and removal, reliable locking, optimized electric field uniformity, good adaptability, and maintainability of the shielding sphere, this invention provides a quick-install shielding sphere for converter station fittings.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a quick-install shielding ball for converter station fittings, comprising a mounting base, a shielding shell fixedly mounted on the upper end of the mounting base, the shielding shell comprising a lower shell, an adjusting shell, and an upper shell, the adjusting shell being rotatably assembled between the lower shell and the upper shell, the outer surfaces of the lower shell, the adjusting shell, and the upper shell being smoothly connected, a driving bevel gear fixedly mounted on the inner wall of the adjusting shell, a driven bevel gear being uniformly rotatably assembled on the inner wall of the upper shell, the driven bevel gear meshing with the driving bevel gear, an adjusting structure fixedly mounted on the inner end of the driven bevel gear, a self-locking structure being assembled on the output end of the adjusting structure, a slide rail structure being uniformly fixedly mounted on the inner wall of the lower shell, the self-locking structure cooperating with the slide rail structure to realize the installation of the lower shell, the adjusting shell, and the upper shell, a connecting structure being assembled on the upper end of the mounting base and located inside the shielding shell, the connecting structure being used for connecting the fittings or busbars to the shielding shell;

[0006] The self-locking structure includes a deflection rod and a telescopic rod, and the telescopic rod is elastically inserted into the lower end of the deflection rod. Rollers are symmetrically rotated on both sides of the lower end of the telescopic rod.

[0007] The slide rail structure includes a mounting plate and a fixing member. The mounting plate is fixedly installed on the upper side of the inner wall of the lower shell. The fixing member is integrally formed on the lower surface of the mounting plate. The upper surface of the mounting plate has a sliding groove extending into the fixing member, and the roller rolls in the sliding groove and completes self-locking.

[0008] Furthermore, the mounting base includes a base, with connecting plates symmetrically fixedly mounted on the upper end of the base, and the lower shell fixedly mounted on the connecting plates. A fixing seat is fixedly mounted between the two connecting plates, and the connecting structure is assembled on the fixing seat.

[0009] Furthermore, gear shafts are uniformly fixedly installed on the lower inner wall of the upper shell, and driven bevel gears are sleeved on the gear shafts.

[0010] Furthermore, the adjustment structure includes a circular plate and a mounting sleeve. The mounting sleeve is fixedly installed on the inner end of the driven bevel gear and sleeved on the gear shaft. The circular plate is fixedly installed on the inner end of the mounting sleeve. An arc-shaped groove is opened on the upper side of the inner end of the circular plate. A fixed shaft is fixedly installed on the lower side of the inner end of the circular plate. The arc-shaped groove and the fixed shaft are symmetrically distributed on the circular plate.

[0011] Furthermore, the lower end of the deflection rod is provided with a mounting groove, and a self-locking spring is fixedly installed in the mounting groove. The upper end of the telescopic rod is inserted into the mounting groove and fixedly installed at the lower end of the self-locking spring. The upper end of the deflection rod is provided with a T-shaped groove, and one end of the adjusting block is inserted into the T-shaped groove. The other end of the adjusting block is inserted into the arc-shaped groove. Elastic structures are symmetrically fixedly installed on both sides of the inner wall of the arc-shaped groove, and the inner ends of the elastic structures are fixedly installed on the adjusting block.

[0012] Furthermore, the upper surface of the mounting plate is provided with a through groove communicating with the slide rail. The slide rail is an arc-shaped track. The thickness of the through groove is equal to the thickness of the telescopic rod. A limit rod is fixedly installed on the vertical side wall of the through groove.

[0013] Furthermore, the chute includes an inlet section, a traveling section, and a self-locking section connected in sequence. The inlet section is opened on the mounting plate, the traveling section is an involute-shaped arc channel, and the self-locking section is an upwardly inclined oblique channel, with the axis of the fixing member located at the oblique channel.

[0014] Furthermore, a small hole is provided on the upper wall at the connection between the arc channel and the oblique channel, a spring is fixedly installed in the small hole, and a steel ball is fixedly installed at the lower end of the spring.

[0015] Furthermore, the connecting structure includes a connecting cylinder, with insert blocks evenly fixedly installed on the lower side of the outer wall of the connecting cylinder, slots evenly opened on the upper side of the inner wall of the fixing seat, and the insert blocks inserted into the slots. The upper end of the connecting cylinder is a closed end, and a connecting spring is fixedly installed on the inner wall of the closed end. A connecting block is fixedly installed on the lower end of the connecting spring, and the connecting block is used to contact the end of the fitting or the busbar. A through hole is opened on the upper surface of the closed end, and a connecting rod is fixedly installed in the middle of the inner wall of the upper shell, and the connecting rod is inserted into the through hole.

[0016] Furthermore, the side wall of the connecting cylinder is provided with a guide groove, the side wall of the connecting block is fixedly installed with a slider, and the slider is movably assembled in the guide groove. The outer end of the slider is fixedly installed with a heat-conducting plate, and the lower outer wall of the heat-conducting plate is uniformly fixedly installed with a heat dissipation plate, and the heat dissipation plate is located below the lower shell.

[0017] The beneficial effects of using this invention are:

[0018] This invention utilizes a rotatable adjustment shell as a single operating interface. Rotating the adjustment shell synchronously drives all internal self-locking mechanisms via a bevel gear set, enabling rapid assembly and locking of the shielding shell. The entire installation process requires only one rotation operation, significantly simplifying the procedure and reducing the difficulty and time required for high-altitude operations.

[0019] This invention incorporates a self-locking structure and a slide rail structure. The shape of the slide rail is designed, and combined with the forced guiding effect of the limiting rod, the rotational motion is converted into a locking force, which can firmly assemble the upper shell, adjusting shell, and lower shell. This achieves assembly from the inside, ensures the smoothness of the outer surface of the shielding shell, and improves the shielding effect.

[0020] In this invention, the shielding shell is assembled from a lower shell, an adjustment shell, and an upper shell. Its outer surface forms a continuous, smooth spherical surface without sharp edges. When the spherical surface achieves equipotentiality with the high-voltage fittings through the internal connection structure, the smooth and continuous surface can maximize the uniformity of the electric field distribution on its surface, effectively reducing the maximum electric field strength on the surface to below the critical corona induction field strength of air, thereby suppressing the generation of corona and achieving a better shielding effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0022] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the shielding shell of the present invention.

[0023] Figure 3 This is a front sectional view of the present invention.

[0024] Figure 4 For the present invention Figure 3 Cross-sectional view along the AA direction.

[0025] Figure 5 For the present invention Figure 3 Cross-sectional view in the BB direction.

[0026] Figure 6 This is a three-dimensional schematic diagram of the self-locking structure of the present invention.

[0027] Figure 7 This is a three-dimensional schematic diagram of the slide rail structure of the present invention.

[0028] Figure 8 This is a three-dimensional schematic diagram of the mounting base of the present invention.

[0029] Figure 9 This is a three-dimensional schematic diagram of the connecting cylinder of the present invention.

[0030] Figure 10 This is a three-dimensional schematic diagram of the connecting block of the present invention.

[0031] The reference numerals in the attached drawings include: 1. Mounting base; 11. Base; 12. Connecting plate; 13. Fixing base; 14. Slot; 2. Shielding shell; 21. Lower shell; 22. Adjusting shell; 221. Driving bevel gear; 23. Upper shell; 231. Gear shaft; 232. Connecting rod; 24. Washer; 3. Driven bevel gear; 4. Adjusting structure; 41. Circular plate; 42. Mounting sleeve; 43. Arc groove; 44. Elastic structure; 45. Fixing shaft; 5. Self-locking structure; 51. Deflection. 52. Telescopic rod, 53. Roller, 54. T-slot, 55. Adjusting block, 6. Slide rail structure, 61. Mounting plate, 62. Fixing component, 63. Slide groove, 631. Inlet section, 632. Traveling section, 633. Self-locking section, 64. Through groove, 65. Limiting rod, 66. Steel ball, 7. Connecting structure, 71. Connecting cylinder, 711. Guide groove, 712. Insert block, 72. Connecting spring, 73. Connecting block, 731. Heat-conducting plate, 732. Heat dissipation plate. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1 to 10A quick-install shielding ball for converter station fittings includes a mounting base 1. A shielding shell 2 is fixedly installed on the upper end of the mounting base 1. The shielding shell 2 includes a lower shell 21, an adjusting shell 22, and an upper shell 23. The adjusting shell 22 is rotatably assembled between the lower shell 21 and the upper shell 23. The outer surfaces of the lower shell 21, the adjusting shell 22, and the upper shell 23 are smoothly connected. A driving bevel gear 221 is fixedly installed on the inner wall of the adjusting shell 22. A driven bevel gear 3 is uniformly rotatably assembled on the inner wall of the upper shell 23. The driven bevel gear 3 meshes with the driving bevel gear 221. An adjusting structure 4 is fixedly installed on the inner end of the driven bevel gear 3. A self-locking structure 5 is assembled on the output end of the adjusting structure 4. A slide rail structure 6 is uniformly fixedly installed on the inner wall of the lower shell 21. The self-locking structure 5 cooperates with the slide rail structure 6 to realize the installation of the lower shell 21, the adjusting shell 22, and the upper shell 23. A connecting structure 7 is assembled on the upper end of the mounting base 1 and inside the shielding shell 2. The connecting structure 7 is used to connect the fittings or busbars to the shielding shell 2.

[0034] This device mainly uses the single rotation input of the adjusting shell 22, through multi-stage transmission, to finally convert it into the precise trajectory movement of the roller 53 in the slide groove 63 and strong radial locking, so as to achieve self-locking and secure assembly of the shielding shell 2, and achieve the effect of quick assembly.

[0035] Mounting base 1 is used to install on the converter station bracket or the flange of the hardware, thereby realizing the installation of the shielding ball. The shielding shell 2 is installed on the mounting base 1 and fitted onto the hardware. The shielding shell 2 is in contact with the hardware or the busbar through the connection structure 7 to ensure that the potential is consistent.

[0036] The shielding shell 2 of this shielding ball device is composed of a lower shell 21, an adjusting shell 22 and an upper shell 23. The outer walls of all three are smooth curved surfaces. After assembly, the outer surface is a continuous smooth curved surface without sharp edges, which can reduce the maximum surface field strength to the maximum extent, making it lower than the critical corona field strength of air and suppressing the generation of corona.

[0037] The adjusting shell 22 includes a smooth outer part and an inner limiting part. The limiting parts at the upper and lower ends of the inner side are used to lock between the lower shell 21 and the upper shell 23 to ensure the installation position. After the initial assembly, the adjusting shell 22 can be rotated to realize the locking action of the internal self-locking structure 5 and the slide rail structure 6, thereby allowing the shielding shell 2 to complete the assembly.

[0038] During the assembly of the shielding shell 2, a gasket 24 is placed between the adjusting shell 22 and the lower shell 21 and the upper shell 23. The gasket 24 can be an O-ring or other structure made of conductive rubber.

[0039] like Figures 4 to 7As shown, the self-locking structure 5 includes a deflection rod 51 and a telescopic rod 52, with the telescopic rod 52 elastically inserted into the lower end of the deflection rod 51. Rollers 53 are symmetrically mounted on both sides of the lower end of the telescopic rod 52. The slide rail structure 6 includes a mounting plate 61 and a fixing member 62. The mounting plate 61 is fixedly installed on the upper side of the inner wall of the lower shell 21. The fixing member 62 is integrally formed on the lower surface of the mounting plate 61. A groove 63 extending into the fixing member 62 is opened on the upper surface of the mounting plate 61, and the rollers 53 roll in the groove 63 and complete the self-locking.

[0040] When the adjusting shell 22 rotates, the meshing of the driving bevel gear 221 and the driven bevel gear 3 can drive the driven bevel gear 3 to rotate, which in turn drives the adjusting structure 4 and the self-locking structure 5 to rotate. The telescopic rod 52 and the roller 53 of the self-locking structure 5 will move into the slide groove 63 of the slide rail structure 6 and complete the self-locking at the end of the slide groove 63. The upper shell 23, the adjusting shell 22 and the lower shell 21 can be spliced ​​and installed through simple operation.

[0041] Specifically, such as Figure 8 As shown, the mounting base 1 includes a base 11, with connecting plates 12 symmetrically fixedly mounted on the upper end of the base 11, and the lower shell 21 fixedly mounted on the connecting plates 12. A fixing seat 13 is fixedly mounted between the two connecting plates 12, and the connecting structure 7 is assembled on the fixing seat 13.

[0042] Mounting base 1 is made of insulating material, and fixing base 13 is a ring structure. The converter station hardware is inserted into the shielding shell 2 after passing through fixing base 13.

[0043] The base 11 has mounting holes and evenly distributed auxiliary mounting holes on its surface. The auxiliary mounting holes are used to install a protective frame on top. The protective frame can be installed on the outside of the shielding shell 2 to block airborne debris or birds and protect the shielding shell 2.

[0044] In this embodiment, the mounting base 1 is designed to allow for installation. In other cases, such as when there is no flange or bracket, the base 11 can be removed and a clamping structure can be installed inside the connecting plate 12 to fix the shielding shell 2 to the hardware.

[0045] Specifically, such as Figure 2 and Figure 3 As shown, gear shafts 231 are uniformly fixedly installed on the lower inner wall of the upper shell 23, and driven bevel gear 3 is sleeved on the gear shaft 231. The driven bevel gear 3 can rotate on the gear shaft 231, while the adjusting structure 4 and the self-locking structure 5 are installed on the upper shell 23.

[0046] Specifically, such as Figures 3 to 5As shown, the adjustment structure 4 includes a circular plate 41 and a mounting sleeve 42. The mounting sleeve 42 is fixedly installed on the inner end of the driven bevel gear 3 and sleeved on the gear shaft 231. The circular plate 41 is fixedly installed on the inner end of the mounting sleeve 42. An arc-shaped groove 43 is provided on the upper side of the inner end of the circular plate 41. A fixed shaft 45 is fixedly installed on the lower side of the inner end of the circular plate 41. The arc-shaped groove 43 and the fixed shaft 45 are symmetrically distributed on the circular plate 41.

[0047] Specifically, such as Figure 3 and Figure 6 As shown, the lower end of the deflection rod 51 has a mounting groove, in which a self-locking spring is fixedly installed. The upper end of the telescopic rod 52 is inserted into the mounting groove and fixedly installed at the lower end of the self-locking spring. The upper end of the deflection rod 51 has a T-shaped groove 54, in which one end of an adjusting block 55 is inserted and fitted. The other end of the adjusting block 55 is inserted into an arc-shaped groove 43. Elastic structures 44 are symmetrically fixedly installed on both sides of the inner wall of the arc-shaped groove 43, and the inner ends of the elastic structures 44 are fixedly installed on the adjusting blocks 55.

[0048] The adjusting block 55 consists of two cylindrical blocks of different diameters. The larger diameter cylindrical block is inserted into the wide slot of the T-shaped groove 54, and the smaller diameter cylindrical block passes through the narrow slot of the T-shaped groove 54 and is inserted into the arc-shaped groove 43. The elastic structure 44 can be an elastic rope, spring, or other elastic structure, used to limit the position of the adjusting block 55 and the deflection rod 51, and apply tension. In the initial state, the deflection rod 51 passes through the axis of the circular plate 41. Through the design of the T-shaped groove 54 and the adjusting block 55, the deflection rod 51 can be deflected on the circular plate 41, forming a situation where the deflection rod 51 does not pass through the axis of the circular plate 41. When this action is completed, the adjusting block 55 will move within the T-shaped groove 54.

[0049] The end of the fixed shaft 45 may be provided with a threaded hole, and a limiting structure may be installed by screwing to limit the position of the deflection rod 51, so as to ensure that the telescopic rod 52 and the roller 53 can be moved into the through groove 64 and the slide groove 63.

[0050] Specifically, such as Figure 4 As shown, the upper surface of the mounting plate 61 is provided with a through groove 64 that communicates with the slide groove 63. The slide groove 63 is an arc-shaped track. The thickness of the through groove 64 is equal to the thickness of the telescopic rod 52. A limit rod 65 is fixedly installed on the vertical side wall of the through groove 64.

[0051] The limiting rod 65 restricts the position of the telescopic rod 52. Figure 4The state shown is when the fixed shaft 45 is at its lowest position. If the adjusting shell 22 is rotated clockwise, the driven bevel gear 3 will rotate counterclockwise, which will drive the self-locking structure 5 to continue to rotate counterclockwise. At this time, the telescopic rod 52 will contact the limiting rod 65 and continue to maintain a vertical state under the restriction of the limiting rod 65. During this operation, the force applied by the limiting rod 65 to the telescopic rod 52 will be transmitted to the deflection rod 51, causing the deflection rod 51 to deflect and maintain a vertical state. When the circular plate 41 rotates, the tangential force of the roller 53 is converted into an axial force that is vertically upward along the telescopic rod 52, which can better complete the stable connection between the lower shell 21 and the upper shell 23.

[0052] Specifically, such as Figure 5 As shown, the slide 63 includes an inlet section 631, a traveling section 632, and a self-locking section 633 connected in sequence. The inlet section 631 is opened on the mounting plate 61. The traveling section 632 is an arc channel in the shape of an involute. The self-locking section 633 is an upwardly inclined oblique channel, and the axis of the fixing member 62 is located at the oblique channel.

[0053] Initially, roller 53 is located outside the entrance section 631, and the self-locking spring is in equilibrium. As the circular plate 41 rotates, roller 53 enters the traveling section 632. Since the traveling section 632 is involute in shape, its curvature gradually increases. Therefore, when roller 53 moves to the lowest position of the traveling section 632, the self-locking spring is in a stretched state. Then, roller 53 enters the self-locking section 633. Within this range, the deflection rod 51 deflects, causing the rotation of the circular plate 41 to apply a greater vertical upward force. At the same time, after the telescopic rod is in a vertical state, the tension of the self-locking spring can also be used entirely to provide a vertical upward force, realizing self-locking at roller 53 and providing sufficient force for the assembly of the shielding shell 2.

[0054] Specifically, such as Figure 5 As shown, a small hole is provided on the upper wall at the connection between the arc channel and the inclined channel. A spring is fixedly installed in the small hole, and a steel ball 66 is fixedly installed at the lower end of the spring.

[0055] When roller 53 passes through the junction of the curved channel and the inclined channel, it will strike steel ball 66 to make a sound, which serves as a reminder. The installer can then continue to fine-tune the adjusting shell 22 to complete the installation.

[0056] Specifically, such as Figure 3 , Figure 9 and Figure 10As shown, the connecting structure 7 includes a connecting cylinder 71. Insert blocks 712 are uniformly fixedly installed on the lower side of the outer wall of the connecting cylinder 71. Slots 14 are uniformly opened on the upper side of the inner wall of the fixing seat 13, and the insert blocks 712 are inserted into the slots 14. The upper end of the connecting cylinder 71 is a closed end. A connecting spring 72 is fixedly installed on the inner wall of the closed end. A connecting block 73 is fixedly installed on the lower end of the connecting spring 72. The connecting block 73 is used to contact the end of the fitting or the busbar. A through hole is opened on the upper surface of the closed end. A connecting rod 232 is fixedly installed in the middle of the inner wall of the upper shell 23, and the connecting rod 232 is inserted into the through hole.

[0057] A threaded cylinder is installed in the middle of the inner wall of the upper shell 23, and the upper end of the connecting rod 232 is threaded and installed in the threaded cylinder by screwing.

[0058] Specifically, such as Figure 2 , Figure 9 and Figure 10 As shown, the side wall of the connecting cylinder 71 is provided with a guide groove 711, the side wall of the connecting block 73 is fixedly installed with a slider, and the slider is movably assembled in the guide groove 711. The outer end of the slider is fixedly installed with a heat-conducting plate 731, and the lower outer wall of the heat-conducting plate 731 is uniformly fixedly installed with a heat dissipation plate 732, and the heat dissipation plate 732 is located below the lower shell 21.

[0059] The connecting cylinder 71, connecting block 73, and connecting rod 232 are all made of metal. When the connecting block 73 comes into contact with the fittings or busbar, it can ensure that the fittings or busbar and the shielding shell 2 are at the same potential.

[0060] The connecting spring 72 is provided so that this device can be used for the installation of fittings of different lengths. For slightly longer fittings, the device can be installed while the fittings are in contact with the connecting block 73.

[0061] The heat conduction plate 731 is mainly used to conduct the temperature of the fittings or busbars and the contact points between the fittings and the equipment, and dissipate the heat at the heat dissipation plate 732. The heat conduction plate 731 is made of insulating and heat-conducting material, such as alumina ceramic material or aluminum nitride ceramic material. The heat dissipation plate 732 is located below the lower shell 21, which is conducive to contact with the circulating air and improves the heat dissipation efficiency.

[0062] The connecting cylinder 71 and the connecting block 73 can be adjusted according to the shape of the hardware or busbar to be installed so as to better fit the installation. After adjusting the shape of the connecting cylinder 71, it can be firmly fitted onto the hardware or busbar, so that the shielding shell 2 can be installed without setting the mounting base 1.

[0063] The removable and installable shielding shell 2 facilitates the adjustment and maintenance of the internal connection structure 7.

[0064] The installation method for this quick-install shielding ball used in converter station fittings includes the following steps:

[0065] Step 1: Site preparation and component inspection;

[0066] 1. Confirm that the converter station equipment is de-energized or take appropriate safety measures for live-line work;

[0067] 2. Check that all components of the shielding ball are complete, undamaged, or deformed, and clean all conductive contact surfaces and insulating surfaces;

[0068] 3. Place the washer 24 into the mounting groove on the upper surface of the lower shell 21;

[0069] Step Two: Equipment Installation;

[0070] 1. Mounting base and lower shell installation;

[0071] Secure the mounting base 1 to the flange of the fitting or busbar or the designated bracket; align the lower housing 21 with the connecting plate 12 on the mounting base 1 and secure it with fasteners to ensure that the lower housing 21 is firmly installed (the lower housing 21 can also be integrally formed with the mounting base 1).

[0072] 2. Pre-installation of connection structure;

[0073] Align the insert 712 at the lower end of the connecting tube 71 of the connecting structure 7 with the slot 14 of the fixing seat 13 on the mounting base 1 and insert it so that the connecting tube 71 is firmly seated in the fixing seat 13.

[0074] 3. Adjust the installation of the upper and lower shells;

[0075] Place the adjusting shell 22 on the lower shell 21, and place the upper shell 23, which has integrated the driven bevel gear 3, the adjusting structure 4 and the self-locking structure 5, on the adjusting shell 22, ensuring that the driving bevel gear 221 and the driven bevel gear 3 mesh well; during this process, the deflection rod 51 and the telescopic rod 52 need to be placed at an angle, and the roller 53 is located at the inlet section 631 of the slide groove 63;

[0076] During the placement of the upper shell 23, the connecting rod 232 is inserted into the through hole of the connecting cylinder 71;

[0077] 4. Rotate the adjusting shell to complete the final locking and shielding;

[0078] Step 3: Final Inspection

[0079] 1. Check that the shielding ball is securely installed and not loose.

[0080] 2. Check that there are no obstructions around the heat conduction plate 731 and heat dissipation plate 732 to ensure good ventilation and heat dissipation;

[0081] 3. If the installation was carried out during a power outage, restore the power supply. If the installation was carried out while the power was on, confirm that the equipment is operating normally and there are no abnormal discharge sounds after the installation is completed.

[0082] The specific steps for completing the final locking and shielding of the rotary adjustment housing are as follows:

[0083] After installation, the construction personnel manually or with the aid of tools rotate the adjusting shell 22 clockwise, causing the driving bevel gear 221 to rotate. Simultaneously, this drives the driven bevel gear 3, evenly distributed on the inner wall of the upper shell 23, to rotate counterclockwise, synchronously driving the adjusting structure 4 and the self-locking structure 5 to rotate. The roller 53 enters the traveling section 632 from the inlet section 631. As the roller 53 moves, the self-locking spring gradually stretches, storing elastic potential energy. When the roller 53 reaches the end of the traveling section 632, it contacts the steel ball 66 and strikes it, producing a sound to remind the construction personnel of the installation progress. Afterward, the roller 53 enters the self-locking section. With the limit rod 65 blocking, the forced telescopic rod 52 and roller 53 remain in a vertical state. At this time, the rotational torque of the circular plate 41 will be converted into a pushing force along the direction of the telescopic rod 52. This force, together with the tension of the self-locking spring, causes the roller to enter the depth of the self-locking section 633, thus achieving self-locking. After the roller 53 reaches the deepest position of the self-locking section 633, the continued rotation of the adjusting shell 22 will drive the deflection rod 51 to move vertically upward through the circular plate 41, and continue to stretch the self-locking spring to provide a stronger pushing force for assembling the lower shell 21 and the upper shell 23 until they are firmly assembled.

[0084] When maintenance or replacement is required, the upper shell 23 can be removed before operation. Before removal, rotate the adjusting shell 22 in the opposite direction. Initially, a large force is required. After the roller 53 strikes the steel ball 66, the subsequent unlocking process can be completed easily and smoothly with the assistance of the self-locking spring. After that, the upper shell 23 can be removed for maintenance or replacement.

[0085] For live-line installation, risk assessment, tool preparation, and work permits must be conducted before site preparation and component inspection. The person in charge of the work organizes a site survey to confirm the safe distance for operation, the working environment, and the feasibility of installing the shielding ball. A complete set of qualified, voltage-matched insulated operating rods, insulated transfer ropes, and insulated safety belts must be prepared, and the workers must wear full sets of shielding suits, etc.

[0086] The above content is only a preferred embodiment of the present invention. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of the present invention. As long as these changes do not depart from the concept of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A quick-install shielding sphere for converter station fittings, characterized in that: The device includes a mounting base, on the upper end of which a shielding shell is fixedly mounted. The shielding shell includes a lower shell, an adjusting shell, and an upper shell, with the adjusting shell rotatably assembled between the lower shell and the upper shell. The outer surfaces of the lower shell, the adjusting shell, and the upper shell are smoothly connected. A driving bevel gear is fixedly mounted on the inner wall of the adjusting shell, and a driven bevel gear is uniformly rotatably mounted on the inner wall of the upper shell, meshing with the driving bevel gear. An adjusting structure is fixedly mounted on the inner end of the driven bevel gear, and a self-locking structure is assembled on the output end of the adjusting structure. A slide rail structure is uniformly fixedly mounted on the inner wall of the lower shell, and the self-locking structure cooperates with the slide rail structure to realize the installation of the lower shell, the adjusting shell, and the upper shell. A connecting structure is assembled on the upper end of the mounting base and inside the shielding shell, and the connecting structure is used to connect hardware or busbars to the shielding shell. The self-locking structure includes a deflection rod and a telescopic rod, and the telescopic rod is elastically inserted into the lower end of the deflection rod. Rollers are symmetrically rotated on both sides of the lower end of the telescopic rod. The slide rail structure includes a mounting plate and a fixing member. The mounting plate is fixedly installed on the upper side of the inner wall of the lower shell. The fixing member is integrally formed on the lower surface of the mounting plate. The upper surface of the mounting plate is provided with a sliding groove extending into the fixing member, and the roller rolls in the sliding groove and completes self-locking. Gear shafts are uniformly fixedly installed on the lower inner wall of the upper shell, and the driven bevel gear is sleeved on the gear shaft. The adjustment structure includes a circular plate and a mounting sleeve. The mounting sleeve is fixedly installed on the inner end of the driven bevel gear and sleeved on the gear shaft. The circular plate is fixedly installed on the inner end of the mounting sleeve. An arc-shaped groove is opened on the upper side of the inner end of the circular plate. A fixed shaft is fixedly installed on the lower side of the inner end of the circular plate. The arc-shaped groove and the fixed shaft are symmetrically distributed on the circular plate.

2. A quick-install shielding ball for converter station fittings as described in claim 1, characterized in that: The mounting base includes a base, with connecting plates symmetrically fixedly mounted on the upper end of the base, and the lower shell fixedly mounted on the connecting plates. A fixing seat is fixedly mounted between the two connecting plates, and the connecting structure is assembled on the fixing seat.

3. A quick-install shielding ball for converter station fittings as described in claim 1, characterized in that: The lower end of the deflection rod has a mounting groove, in which a self-locking spring is fixedly installed. The upper end of the telescopic rod is inserted into the mounting groove and fixedly installed at the lower end of the self-locking spring. The upper end of the deflection rod has a T-shaped groove, in which one end of an adjusting block is inserted and fitted. The other end of the adjusting block is inserted into an arc-shaped groove. Elastic structures are symmetrically fixedly installed on both sides of the inner wall of the arc-shaped groove, and the inner ends of the elastic structures are fixedly installed on the adjusting block.

4. A quick-install shielding ball for converter station fittings as described in claim 3, characterized in that: The upper surface of the mounting plate is provided with a through groove that communicates with the slide rail. The slide rail is an arc-shaped track. The thickness of the through groove is equal to the thickness of the telescopic rod. A limit rod is fixedly installed on the vertical side wall of the through groove.

5. A quick-install shielding ball for converter station fittings according to claim 4, characterized in that: The chute includes an inlet section, a traveling section, and a self-locking section connected in sequence. The inlet section is opened on the mounting plate. The traveling section is an involute-shaped arc channel. The self-locking section is an upwardly inclined channel, and the axis of the fixing member is located at the inclined channel.

6. A quick-install shielding ball for converter station fittings according to claim 5, characterized in that: A small hole is provided on the upper wall at the connection between the arc channel and the oblique channel. A spring is fixedly installed in the small hole, and a steel ball is fixedly installed at the lower end of the spring.

7. A quick-install shielding ball for converter station fittings according to claim 2, characterized in that: The connecting structure includes a connecting cylinder, with insert blocks evenly fixedly installed on the lower side of the outer wall of the connecting cylinder. Slots are evenly opened on the upper side of the inner wall of the fixing seat, and the insert blocks are inserted into the slots. The upper end of the connecting cylinder is a closed end, and a connecting spring is fixedly installed on the inner wall of the closed end. A connecting block is fixedly installed on the lower end of the connecting spring, and the connecting block is used to contact the end of the fitting or the busbar. A through hole is opened on the upper surface of the closed end, and a connecting rod is fixedly installed in the middle of the inner wall of the upper shell, and the connecting rod is inserted into the through hole.

8. A quick-install shielding ball for converter station fittings according to claim 7, characterized in that: The connecting cylinder has a guide groove on its side wall, and the connecting block has a slider fixedly installed on its side wall. The slider is movably assembled in the guide groove. A heat-conducting plate is fixedly installed on the outer end of the slider. A heat dissipation plate is evenly fixedly installed on the lower outer wall of the heat-conducting plate, and the heat dissipation plate is located below the lower shell.

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