Umbrella-shaped hollow porcelain insulator

Abstract

The invention relates to the technical field of power equipment, in particular to an umbrella-shaped hollow porcelain insulator which comprises a supporting shaft, an umbrella cap and a bottom plate are arranged at the upper end and the lower end of the supporting shaft respectively, a high-voltage wire is installed at the top of the umbrella cap, and a plurality of large umbrella skirts and a plurality of small umbrella skirts are arranged between the umbrella cap and the bottom plate; central cylinders are fixedly mounted in the middles of the large umbrella skirts and the small umbrella skirts, notch grooves are formed in the side faces of the central cylinders and form C-shaped structures, and upper clamping plates and lower clamping plates are fixed to the edges of the upper ends and the lower ends of the central cylinders respectively; the beneficial effects are that the plurality of large umbrella skirts and the plurality of small umbrella skirts are arranged on the outer side of the supporting shaft, the central cylinders are installed in the middle parts of the large umbrella skirts and the small umbrella skirts in a penetrating manner, and two adjacent central cylinders can be separated by sliding the umbrella skirts at any position along the length direction of the supporting shaft; according to the device, the umbrella skirts can be independently replaced, the replacement cost is low, and replacement is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a kind of umbrella-shaped hollow porcelain insulator. BACKGROUND

[0002] Insulator is widely used in power system and electrical equipment, its core function is to use the insulator made of ceramic, glass or composite material, effectively support and fix live conductor (such as high-voltage wire), its unique umbrella skirt structure design can extend the creepage distance, resist rain, snow, pollution and other environmental factors, avoid flashover accident under high voltage.

[0003] In the prior art, the Chinese invention with publication number CN110473677B discloses a kind of hollow post insulator, its hollow post insulator adopts two ends taper hollow insulating tube, combines end sealing structure to be blocked, enhances sealing effect, and in one end of hollow insulating tube is provided with automatic blocking device, can be convenient for gas filling and discharging operation, still be provided with containing part in end sealing structure for containing drying agent, can guarantee that the micro water content in insulating tube is kept below standard value, ensure the internal insulation effect of insulator.

[0004] But at present, most insulators are integral structure, when local damage of insulator, need to be replaced as a whole, not only replacement cost is big, and high-altitude replacement operation is inconvenient, it has great safety hazard to staff.For this reason, the present application proposes a kind of umbrella-shaped hollow porcelain insulator to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide an umbrella-shaped hollow porcelain insulator to solve the problem of inconvenient local replacement of traditional insulator in the background art.

[0006] To achieve the above purpose, the present application provides the following technical solution: an umbrella-shaped hollow porcelain insulator, comprising: A support shaft, the upper and lower ends of the support shaft are provided with umbrella cap and bottom plate respectively, the top of the umbrella cap is installed with high-voltage wire, a plurality of large umbrella skirts and a plurality of small umbrella skirts are provided between the umbrella cap and the bottom plate, and the plurality of large umbrella skirts and the plurality of small umbrella skirts are sequentially and spaced distributed from top to bottom, the surface of the large umbrella skirt and the small umbrella skirt is provided with dismounting groove, and the dismounting grooves of two adjacent ones in the circumferential direction of the support shaft are at an angle of ninety degrees. A central tube is fixedly installed in the middle of both the large and small umbrella skirts. The central tube has a notch and groove on its side, forming a "C" shape. An upper clamping plate and a lower clamping plate are fixed at the upper and lower edges of the central tube, respectively. The upper and lower clamping plates are symmetrically distributed on both sides of the notch and groove, and are located at both ends of the diameter of the central tube. The upper clamping plate is inserted into the inner cavity of the notch and groove above it, and the lower clamping plate is inserted into the inner cavity of the notch and groove below it. A positioning plate is fixed to the inner wall of the central tube, and the positioning plate abuts against the outer wall of the support shaft.

[0007] Preferably, the width of the notch and the width of the disassembly groove are the same, and both are not less than the diameter of the support shaft. The notch corresponds to the disassembly groove, and the height of the upper and lower clamping plates are the same, and both are half the height of the notch, so that multiple center cylinders can be spliced ​​together to form a complete cylinder.

[0008] Preferably, the outer wall of the central tube has two C-shaped grooves, and the inner cavity of the C-shaped grooves is fitted with C-shaped retaining springs. The two C-shaped retaining springs are respectively attached to the upper and lower sides of the large umbrella skirt, and the outer side of the C-shaped retaining springs is coated with an insulating coating. The large umbrella skirt and the central tube are glued and fixed together, thereby ensuring that the umbrella skirt and the central tube will not rotate relative to each other, which would cause the notch groove and the disassembly groove to misalign.

[0009] Preferably, the upper surfaces of both the large and small umbrella skirts are provided with water guide grooves, and the water guide grooves correspond to the disassembly grooves located above them. The positioning plates are provided in groups of two and are located on the inner walls of the upper and lower ends of the central cylinder, respectively. The positioning plates and the notch grooves are located at the two ends of the diameter of the central cylinder, thereby preventing the horizontal relative sliding between the central cylinder and the support shaft from being blocked by the positioning plates.

[0010] Preferably, the top of the umbrella cap is fixed with a boss, a rotating cylinder is rotatably sleeved on the outside of the boss, a truncated cone is fixed on the top of the rotating cylinder, a recessed groove for placing the high-voltage line is opened in the middle of the surface of the truncated cone, and a locking buckle for clamping the high-voltage line is provided on the surface of the truncated cone, so as to realize the stable installation of the high-voltage line and prevent it from detaching from the truncated cone in windy weather.

[0011] Preferably, the surface of the boss is provided with an annular groove, and a support screw is provided through the outer wall of the rotating cylinder along its radial direction. Multiple support screws are provided along the circumference of the rotating cylinder and are distributed in a ring array. One end of the support screw abuts into the inner cavity of the annular groove, thereby preventing the rotating cylinder from moving upward and causing it to separate from the boss.

[0012] Preferably, the top of the support shaft and the inner wall of the boss are both provided with threads. The support shaft passes through the middle of the umbrella cap and is fixedly connected to the boss through the threads. The locking buckle has an arc-shaped structure. One end of the locking buckle is fixed to the surface of the truncated cone. The locking buckle is made of a non-metallic material that can undergo elastic deformation. The part of the high-voltage line located in the inner cavity of the recessed groove is wrapped with a protective layer to prevent the contact part between the high-voltage line and the recessed groove from being worn for a long time and causing safety hazards.

[0013] Preferably, the base plate is fixedly connected to the external transmission tower beam by bolts, and a protruding plate is fixed on the surface of the base plate, and the protruding plate is inserted into the notch above it. The lower end of the support shaft passes through the middle of the base plate and is rotatably connected to it, so as to ensure that when the support shaft rotates, the central cylinder above the base plate will not rotate and affect its own position.

[0014] Preferably, the lower end face of the support shaft is provided with an inflation port, the support shaft is hollow inside and filled with insulating gas through the inflation port, a wrench for rotating the support shaft is sleeved on the lower end of the support shaft, an anti-rotation groove is opened at the lower end of the outer wall of the support shaft, the wrench is annular and an anti-rotation platform corresponding to the anti-rotation groove is fixed on the inner wall, and a handle is fixed on the outer wall of the wrench so that the operator can rotate the support shaft through a special handle.

[0015] Preferably, an annular platform is fixed to the outer wall of the support shaft at the position corresponding to the base plate, a positioning cylinder is fixed to the lower surface of the base plate, and the positioning cylinder is sleeved on the outer side of the annular platform. Limiting springs are provided at both the upper and lower ends of the outer wall of the annular platform to prevent the support shaft from moving up and down along its own length direction and causing its own position to become unstable.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention features multiple large and small umbrella skirts arranged on the outer side of a support shaft, spaced sequentially. Each umbrella skirt has a disassembly groove, the width of which is not less than the diameter of the support shaft. Adjacent disassembly grooves form a 90-degree angle along the circumference of the support shaft. A central cylinder, shaped like a "C," is installed through the center of each umbrella skirt. A positioning plate is fixed to the inner wall of the central cylinder, abutting against the support shaft. Upper and lower clamping plates are fixed at the upper and lower ends of the central cylinder, respectively, and are inserted into adjacent notches. By sliding the large (or small) umbrella skirt at any position along the length of the support shaft, adjacent central cylinders can be separated, facilitating the quick removal and replacement of the central cylinder along with the large (or small) umbrella skirts from the support shaft. This device allows for the individual replacement of the large (or small) umbrella skirts, resulting in low replacement costs and ease of replacement, thereby reducing safety hazards for workers operating at heights. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 This is a schematic diagram of the installation of the large umbrella skirt, small umbrella skirt, and support shaft structure of the present invention; Figure 5 This is a schematic diagram showing the separation of the large umbrella skirt and the small umbrella skirt structure of the present invention; Figure 6 This is a three-dimensional schematic diagram of the large umbrella skirt structure of the present invention; Figure 7 This is a three-dimensional schematic diagram of the central tube structure of the present invention; Figure 8 This is a schematic diagram of the high-voltage line structure installation of the present invention; Figure 9 This is a schematic diagram showing the separation of the rotating cylinder and umbrella cap structure of the present invention; Figure 10 This is a schematic diagram showing the separation of the base plate and the transmission tower beam structure of the present invention; Figure 11 This is a schematic diagram of the installation of the support shaft and the base plate structure of the present invention; Figure 12 This is a three-dimensional schematic diagram of the wrench structure of the present invention.

[0018] In the diagram: 1. Support shaft; 11. Inflation port; 12. Annular platform; 13. Limiting snap ring; 14. Anti-rotation groove; 2. Umbrella cap; 21. Rotating cylinder; 211. Support screw; 22. Frustum; 23. Recessed groove; 24. Locking buckle; 25. Boss; 251. Annular groove; 3. Base plate; 31. Protruding plate; 32. Positioning cylinder; 4. Large umbrella skirt; 41. Small umbrella skirt; 42. Disassembly groove; 43. Center cylinder; 431. Notch groove; 432. Upper clamping plate; 433. Lower clamping plate; 434. Positioning plate; 435. C-shaped groove; 436. C-shaped snap ring; 44. Water guide groove; 45. Insulating coating; 5. High voltage line; 51. Protective layer; 6. Transmission tower crossbeam; 7. Wrench; 71. Anti-rotation platform; 72. Handle. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0020] Please see Figures 1 to 12 The present invention provides a technical solution: Example 1: An umbrella-shaped hollow porcelain insulator includes: a support shaft 1.

[0021] Specifically, an umbrella cap 2 and a base plate 3 are respectively installed at the upper and lower ends of the support shaft 1. A high-voltage line 5 is installed on the top of the umbrella cap 2, which is used to provide local support for the high-voltage line 5. Multiple large umbrella skirts 4 and multiple small umbrella skirts 41 are arranged between the umbrella cap 2 and the base plate 3, and the multiple large umbrella skirts 4 and multiple small umbrella skirts 41 are distributed alternately from top to bottom, such as... Figure 5 As shown, the large umbrella skirt 4 and the small umbrella skirt 41 have the same structure, differing only in diameter. Both the large umbrella skirt 4 and the small umbrella skirt 41 have disassembly grooves 42 on their surfaces. Two adjacent disassembly grooves 42 form a 90-degree angle along the circumference of the support shaft 1, and... Figure 4 As shown, there are two large umbrella skirts 4 and two small umbrella skirts 41, totaling four umbrella skirts. The four disassembly slots 42 on them are located at four points in the circumferential direction: 0°, 90°, 180° and 270° respectively. That is to say, although the device has notches on the umbrella skirts, there are three other umbrella skirts above and below each notch to block them. Therefore, the entire device can still extend the current creepage distance, thereby avoiding the generation of local electric arcs and having a good insulation effect. Secondly, a central tube 43 is fixedly installed in the middle of both the large umbrella skirt 4 and the small umbrella skirt 41. The central tube 43 has a notch 431 on its side, forming a "C"-shaped structure, such as... Figure 5 As shown, the notch on the central cylinder 43 corresponds to the disassembly groove 42. When a single large umbrella skirt 4 (or small umbrella skirt 41) moves up and down and separates from other small umbrella skirts 41 (or large umbrella skirt 4), it can be separated from the support shaft 1 by horizontally sliding the large umbrella skirt 4 (or small umbrella skirt 41). In other words, this device can easily remove and replace a single large umbrella skirt 4 (or small umbrella skirt 41), thereby reducing the replacement cost. An upper clamping plate 432 and a lower clamping plate 433 are fixed at the upper and lower edges of the central cylinder 43, respectively. The upper clamping plate 432 and the lower clamping plate 433 are symmetrically distributed on both sides of the notch groove 431, and the upper clamping plate 432 and the lower clamping plate 433 are respectively located on the vertical axis of the central cylinder 43. At both ends of the diameter, the upper clamping plate 432 is inserted into the inner cavity of the notch 431 above it, and the lower clamping plate 433 is inserted into the inner cavity of the notch 431 below it. Therefore, any two adjacent central cylinders 43 can remain relatively fixed, neither rotating relative to each other nor separating horizontally. The central cylinders 43 can only move up and down vertically. Due to the weight of the large umbrella skirt 4, the small umbrella skirt 41, the umbrella cap 2, and the high-voltage line 5, multiple central cylinders 43 will inevitably remain stacked sequentially under normal conditions and will not easily move upwards. In addition, a positioning plate 434 is fixed on the inner wall of the central cylinder 43, and the positioning plate 434 abuts against the outer wall of the support shaft 1.Figure 6 and Figure 7 As shown, the positioning plate 434 is used to limit the relative position between the support shaft 1 and the central cylinder 43, ensuring that the support shaft 1 and the central cylinder 43 can maintain a concentric state. It should be noted that a single central cylinder 43 cannot maintain concentricity with the support shaft 1 by relying solely on the positioning plate 434. Only when multiple central cylinders 43 are stacked and installed, with multiple positioning plates 434 located at different points in the circumferential direction, can the overall cylinder formed by the multiple central cylinders 43 be limited to maintain a stable concentric state with the support shaft 1. Combined with the fact that two adjacent central cylinders 43 must maintain a relatively fixed state, a stable concentric state between the central cylinder 43 and the support shaft 1 can be achieved. In other words, although a single central cylinder 43 cannot maintain concentricity with the support shaft 1 by relying solely on the positioning plate 434, when multiple central cylinders 43 are stacked, the multiple positioning plates 434 work together to achieve concentricity between the central cylinder 43 and the support shaft 1.

[0022] To assemble multiple center cylinders 43, the width of the notch 431 and the width of the disassembly groove 42 are the same, and both are not less than the diameter of the support shaft 1. The notch 431 corresponds to the disassembly groove 42, meaning that the large umbrella skirt 4 (or small umbrella skirt 41) can slide the support shaft 1 out along the inner cavity of the notch 431 and the disassembly groove 42 by horizontal movement, thereby realizing the disassembly and replacement of a single large umbrella skirt 4 (or small umbrella skirt 41). Secondly, the height of the upper clamping plate 432 and the lower clamping plate 433 are the same, and both are half the height of the notch 431. Figure 4 Figure 5 and Figure 7 As shown, the upper and lower halves of the inner cavity of a notch 431 are respectively connected to a lower clamping plate 433 and an upper clamping plate 432, and the two can completely fill the inner cavity of the notch 431, thereby ensuring that multiple center cylinders 43 can be spliced ​​together to form a complete cylinder.

[0023] To securely connect the large umbrella skirt 4 (or small umbrella skirt 41) to the central cylinder 43, this application further includes two C-shaped grooves 435 formed on the outer wall of the central cylinder 43. C-shaped retaining springs 436 are fitted into the inner cavities of the C-shaped grooves 435, with the two C-shaped retaining springs 436 respectively abutting the upper and lower sides of the large umbrella skirt 4. The C-shaped retaining springs 436 are used to limit the vertical relative position between the large umbrella skirt 4 (or small umbrella skirt 41) and the central cylinder 43, thereby preventing the large umbrella skirt 4 (or small umbrella skirt 41) from shifting along the length of the central cylinder 43. The C-type retaining ring 436 is coated with an insulating coating 45 on its outer side. The insulating coating 45 is mainly used to insulate the C-type retaining ring 436. The large umbrella skirt 4 is glued and fixed to the central cylinder 43 to prevent the large umbrella skirt 4 (or small umbrella skirt 41) from rotating on the outside of the central cylinder 43, thereby ensuring that the notch groove 431 and the disassembly groove 42 always maintain a corresponding state. In this way, the notches on any two adjacent umbrella skirts will not overlap, thereby ensuring that the entire device has a good insulation effect.

[0024] To limit the installation position of the positioning plate 434, this application also has water guiding grooves 44 on the upper surfaces of both the large umbrella skirt 4 and the small umbrella skirt 41, and the water guiding grooves 44 correspond to the disassembly grooves 42 located above them. The water guiding grooves 44 are mainly used to guide the rainwater leaking from the disassembly grooves 42 above them, so that the rainwater can be drained away in time and avoid rainwater accumulation and diffusion. Secondly, the positioning plates 434 are set in pairs and are located on the inner walls of the upper and lower ends of the central cylinder 43, respectively. The positioning plates 434 and the notch grooves 431 are located at the two ends of the diameter of the central cylinder 43, respectively. Setting two positioning plates 434 as a pair can reduce the squeezing force of the positioning plates 434 on the side wall of the support shaft 1, and avoid excessive local squeezing force on the support shaft 1, which could lead to damage. In addition, the positions of the positioning plates 434 and the notch grooves 431 are exactly opposite to each other, thereby preventing the horizontal relative sliding between the central cylinder 43 and the support shaft 1 from being blocked by the positioning plates 434.

[0025] To install the high-voltage line 5, this application also includes a boss 25 fixed on the top of the umbrella cap 2. A rotating cylinder 21 is rotatably sleeved on the outside of the boss 25. The rotating cylinder 21 can only rotate on the outside of the boss 25 without separating from it. A frustum 22 is fixed on the top of the rotating cylinder 21 to increase the diameter of the top of the rotating cylinder 21, thereby increasing the support area for the high-voltage line 5. A recessed groove 23 for placing the high-voltage line 5 is opened in the middle of the surface of the frustum 22 to prevent the high-voltage line 5 from easily swaying horizontally and separating from the frustum 22. A locking buckle 24 for clamping the high-voltage line 5 is provided on the surface of the frustum 22. The locking buckle 24 can be used to clamp and limit the vertical movement of the high-voltage line 5, thereby improving the stability of the installation of the high-voltage line 5 and ensuring that the whole device can provide good and stable support for the high-voltage line 5.

[0026] To prevent the rotating cylinder 21 from separating from the boss 25, this application further includes an annular groove 251 formed on the surface of the boss 25. Support screws 211 are provided through the outer wall of the rotating cylinder 21 along its radial direction. Multiple support screws 211 are arranged along the circumference of the rotating cylinder 21 in a circular array. One end of each support screw 211 abuts into the inner cavity of the annular groove 251. Figure 9 As shown, the engagement between the end of the support screw 211 and the annular groove 251 prevents the rotating cylinder 21 from moving upward and separating from the boss 25. Therefore, the rotating cylinder 21 and the boss 25 only maintain relative rotation and do not separate from each other.

[0027] To connect the umbrella cap 2 to the support shaft 1, this application further includes threads on both the top of the support shaft 1 and the inner wall of the boss 25. The support shaft 1 passes through the middle of the umbrella cap 2 and is fixedly connected to the boss 25 via the threads. Figure 9 and Figure 3 As shown, when the support shaft 1 and the umbrella cap 2 of this device rotate relative to each other, the umbrella cap 2 can slide up and down along the length of the support shaft 1. By moving the umbrella cap 2 downward, the multiple central cylinders 43 below the umbrella cap 2 can be pressed together to prevent the multiple central cylinders 43 from becoming loose. By moving the umbrella cap 2 upward, and then moving the central cylinders 43 upward, it is easy to disassemble the central cylinders 43 at a designated position. In addition, the locking buckle 24 has an arc-shaped structure, one end of the locking buckle 24 is fixed to the surface of the frustum 22, and the locking buckle 24 is made of a non-metallic material that can undergo elastic deformation, such as... Figure 8 As shown, the locking buckle 24 uses its own elasticity to lock and position the high-voltage line 5. The part of the high-voltage line 5 located in the inner cavity of the recessed groove 23 is wrapped with a protective layer 51. The protective layer 51 can be used to protect the high-voltage line 5 at this position and prevent the high-voltage line 5 from being worn due to contact with the truncated cone 22.

[0028] To prevent the central cylinder 43 from rotating on the upper side of the base plate 3, the base plate 3 of this application is fixedly connected to the external transmission tower beam 6 by bolts, and the position of the base plate 3 itself remains fixed. A protruding plate 31 is fixed on the surface of the base plate 3, and the protruding plate 31 is inserted into the notch 431 above it. The protruding plate 31 can be used to position the central cylinder 43 on its upper side, thereby preventing the central cylinder 43 from rotating. The lower end of the support shaft 1 passes through the middle of the base plate 3 and is rotatably connected to it. That is to say, the support shaft 1 of this device can rotate. The operator can rotate the support shaft 1 to make the umbrella cap 2 rotate relative to the support shaft 1, thereby moving the umbrella cap 2 upward.

[0029] To facilitate the rotation of the support shaft 1, this application also includes an inflation port 11 on the lower end face of the support shaft 1. The support shaft 1 is hollow inside and filled with insulating gas through the inflation port 11. The inflation port 11 is configured to fill the inner cavity of the support shaft 1 with insulating gas according to actual needs and control the air pressure inside the support shaft 1. A wrench 7 for rotating the support shaft 1 is fitted onto the lower end of the support shaft 1. An anti-rotation groove 14 is opened at the lower end of the outer wall of the support shaft 1. The wrench 7 is annular, and an anti-rotation platform 71 corresponding to the anti-rotation groove 14 is fixed on its inner wall. A handle 72 is fixed on the outer wall of the wrench 7. Figure 10 , Figure 11 and Figure 12 As shown, the wrench 7 is dedicated to this device and is mainly used to control the rotation of the support shaft 1.

[0030] To prevent the support shaft 1 from tilting and moving vertically, an annular platform 12 is fixed to the outer wall of the support shaft 1 at the corresponding position of the base plate 3. A positioning cylinder 32 is fixed to the lower surface of the base plate 3, and the positioning cylinder 32 is sleeved on the outside of the annular platform 12. The cooperation between the positioning cylinder 32 and the annular platform 12 is used to improve the installation stability between the support shaft 1 and the base plate 3, prevent the support shaft 1 from tilting, and prevent the support shaft 1 from breaking. Limiting springs 13 are provided at both the upper and lower ends of the outer wall of the annular platform 12, so as to prevent the support shaft 1 from sliding relative to the base plate 3 in the vertical direction under the action of gravity.

[0031] 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. An umbrella-shaped hollow porcelain insulator, characterized in that: include: Support shaft (1), with umbrella cap (2) and base plate (3) respectively at the upper and lower ends of the support shaft (1). A high voltage line (5) is installed on the top of the umbrella cap (2). Multiple large umbrella skirts (4) and multiple small umbrella skirts (41) are arranged between the umbrella cap (2) and the base plate (3). The multiple large umbrella skirts (4) and multiple small umbrella skirts (41) are distributed alternately from top to bottom. The surfaces of the large umbrella skirts (4) and the small umbrella skirts (41) are provided with disassembly grooves (42). Two adjacent disassembly grooves (42) are at a 90-degree angle in the circumferential direction of the support shaft (1). A central tube (43) is fixedly installed in the middle of both the large umbrella skirt (4) and the small umbrella skirt (41). The central tube (43) has a notch (431) on its side and forms a "C" shape. An upper clamping plate (432) and a lower clamping plate (433) are fixed at the upper and lower edges of the central tube (43), respectively. The upper clamping plate (432) and the lower clamping plate (433) are symmetrically distributed on both sides of the notch (431), and the upper clamping plate (432) and the lower clamping plate (433) are located at both ends of the diameter of the central tube (43). The upper clamping plate (432) is inserted into the inner cavity of the notch (431) above it, and the lower clamping plate (433) is inserted into the inner cavity of the notch (431) below it. A positioning plate (434) is fixed on the inner wall of the central tube (43), and the positioning plate (434) abuts against the outer wall of the support shaft (1).

2. The umbrella-shaped hollow porcelain insulator according to claim 1, characterized in that: The width of the notch (431) is the same as the width of the disassembly groove (42), and both are not less than the diameter of the support shaft (1). The notch (431) corresponds to the disassembly groove (42). The height of the upper plate (432) and the lower plate (433) is the same, and both are half the height of the notch (431).

3. The umbrella-shaped hollow porcelain insulator according to claim 2, characterized in that: The outer wall of the central tube (43) has two C-shaped grooves (435), and the inner cavity of the C-shaped grooves (435) is fitted with C-shaped retaining springs (436). The two C-shaped retaining springs (436) are respectively attached to the upper and lower sides of the large umbrella skirt (4), and the outer side of the C-shaped retaining springs (436) is coated with an insulating coating (45). The large umbrella skirt (4) is glued and fixed to the central tube (43).

4. The umbrella-shaped hollow porcelain insulator according to claim 3, characterized in that: The upper surfaces of the large umbrella skirt (4) and the small umbrella skirt (41) are provided with water guide grooves (44), and the water guide grooves (44) correspond to the disassembly grooves (42) located above them. The positioning plates (434) are set in pairs and are located on the inner walls of the upper and lower ends of the central cylinder (43), respectively. The positioning plates (434) and the notch grooves (431) are located at the two ends of the diameter of the central cylinder (43), respectively.

5. The umbrella-shaped hollow porcelain insulator according to claim 1, characterized in that: The top of the umbrella cap (2) is fixed with a boss (25), and a rotating cylinder (21) is rotatably sleeved on the outside of the boss (25). A frustum (22) is fixed on the top of the rotating cylinder (21). A recessed groove (23) for placing the high voltage line (5) is opened in the middle of the surface of the frustum (22). A locking buckle (24) for clamping the high voltage line (5) is provided on the surface of the frustum (22).

6. The umbrella-shaped hollow porcelain insulator according to claim 5, characterized in that: The surface of the boss (25) is provided with an annular groove (251). The outer wall of the rotating cylinder (21) is provided with a support screw (211) along its radial direction. Multiple support screws (211) are provided along the circumference of the rotating cylinder (21) and are arranged in an annular array. One end of the support screw (211) abuts into the inner cavity of the annular groove (251).

7. The umbrella-shaped hollow porcelain insulator according to claim 6, characterized in that: The top of the support shaft (1) and the inner wall of the boss (25) are both provided with threads. The support shaft (1) passes through the middle of the umbrella cap (2) and is fixedly connected to the boss (25) through the threads. The locking buckle (24) is an arc-shaped structure. One end of the locking buckle (24) is fixed to the surface of the truncated cone (22). The locking buckle (24) is made of a non-metallic material that can undergo elastic deformation. The part of the high-voltage line (5) located in the inner cavity of the recessed groove (23) is wrapped with a protective layer (51).

8. The umbrella-shaped hollow porcelain insulator according to claim 7, characterized in that: The base plate (3) is fixedly connected to the external transmission tower beam (6) by bolts. A protruding plate (31) is fixed on the surface of the base plate (3), and the protruding plate (31) is inserted into the notch (431) above it. The lower end of the support shaft (1) passes through the middle of the base plate (3) and is rotatably connected to it.

9. The umbrella-shaped hollow porcelain insulator according to claim 8, characterized in that: The lower end face of the support shaft (1) is provided with an air inlet (11). The support shaft (1) is hollow inside and filled with insulating gas through the air inlet (11). The lower end of the support shaft (1) is fitted with a wrench (7) for rotating it. The lower end of the outer wall of the support shaft (1) is provided with an anti-rotation groove (14). The wrench (7) is ring-shaped and has an anti-rotation platform (71) that is inserted into the anti-rotation groove (14) fixed on its inner wall. The outer wall of the wrench (7) is fixed with a handle (72).

10. An umbrella-shaped hollow porcelain insulator according to claim 9, characterized in that: The outer wall of the support shaft (1) and the base plate (3) is fixed with an annular platform (12). The lower surface of the base plate (3) is fixed with a positioning cylinder (32), and the positioning cylinder (32) is sleeved on the outer side of the annular platform (12). The upper and lower ends of the outer wall of the annular platform (12) are both fitted with limiting spring clips (13).

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