Porcelain post insulator and preparation method thereof

Abstract

The invention discloses a porcelain post insulator and a preparation method thereof, and relates to the technical field of insulators, the porcelain post insulator comprises an inner column, the inner column is provided with a plurality of sets of external members which are sequentially distributed along the axial direction of the inner column, each external member is formed by splicing two half sleeves, the outer wall of each half sleeve is fixedly connected with a half skirt, and two corresponding half skirts are attached to each other to form an umbrella skirt; a supporting assembly is arranged between every two adjacent sleeve pieces, each supporting assembly comprises two middle rings, the middle rings are arranged on the inner column in a sliding mode, the half sleeves are provided with half ring grooves for the corresponding middle rings to be connected in a clamped mode, and the faces, close to each other, of the two middle rings are provided with contraction grooves. According to the porcelain post insulator and the preparation method thereof, by arranging the top ring, the bottom ring, the supporting assembly and other structures, targeted replacement of a single set of half-sleeve and half-skirt integrated porcelain piece is achieved, operation is convenient and fast, other integrated porcelain pieces do not need to be disassembled in the whole process, the insulator does not need to be disassembled, butt joint of a cable and the insulator is not affected, and the use efficiency of the porcelain post insulator is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulators, in particular to a porcelain post insulator and a preparation method thereof. BACKGROUND

[0002] With the development of modern society, the use of electricity is becoming more and more common, and in order to avoid excessive loss, electricity is usually transmitted in the form of high voltage, which has high pressure and low transmission loss. Finally, it is used after being transformed into a suitable voltage. Generally, high-voltage cables are installed in a relatively high place to avoid danger caused by accidental touch or other reasons. An insulator is usually used to connect the cable and the telegraph pole, which has high safety and prevents damage caused by lightning. There are many types of insulators, and the most widely used is porcelain insulator.

[0003] A new type of high-strength rod-shaped porcelain insulator is disclosed in the patent with the title: A new type of high-strength rod-shaped porcelain insulator (patent application number: CN202210022428.0), which connects the base, several connecting pieces, and the end part from top to bottom to form a porcelain insulator. The porcelain insulator is assembled to have high tensile strength and improve the durability of the porcelain insulator while effectively reducing the maintenance cost of the power line. However, when one of the connecting pieces needs to be replaced during actual use, especially the connecting piece at the middle position, the connecting pieces at other positions also need to be removed and replaced, which is cumbersome and inefficient.

[0004] Therefore, it is necessary to provide a porcelain post insulator and a preparation method thereof to solve the above problems. SUMMARY

[0005] The present application aims to provide a porcelain post insulator and a preparation method thereof to solve the problem of replacing the connecting piece at the middle position when one of the connecting pieces needs to be replaced during actual use, which is cumbersome and inefficient.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a porcelain post insulator, comprising an inner column, a plurality of sets of sleeves are arranged on the inner column in sequence along the axial direction of the inner column, the sleeve is assembled by two half sleeves, a half skirt is fixedly connected to the outer wall of the half sleeve, and the corresponding two half skirts are mutually adhered to form a skirt;

[0007] A supporting assembly is arranged between adjacent two sleeves, the supporting assembly comprises two middle rings, the middle rings are slidingly arranged on the inner column, a half ring groove is formed in the half sleeve for clamping the corresponding middle ring, and a contraction groove is formed in one side of each of the two middle rings, and a first spring is arranged between the corresponding two contraction grooves;

[0008] The top of the inner column is fixedly connected to a top ring, which abuts against the topmost half of the sleeve. The bottom of the inner column is threadedly connected to a bottom ring, which abuts against the bottommost half of the sleeve.

[0009] Preferably, multiple shrinkage grooves are provided, and the multiple shrinkage grooves are evenly distributed around the axis of the central ring.

[0010] Preferably, each of the two middle rings has a protrusion fixedly connected to the side that is far apart from each other. Multiple protrusions are provided and are evenly distributed around the axis of the middle ring. The half-sleeve has a groove for inserting the protrusion.

[0011] Preferably, a side groove is formed on the outer wall of the inner column, and an ear block is fixedly connected to the inner ring of the middle ring, the ear block being slidably disposed inside the side groove.

[0012] Preferably, a threaded rod is fixedly connected to the bottom end of the inner column, and a nut is threaded onto the threaded rod.

[0013] Preferably, the bottom ring has a slot, a U-shaped component is inserted into the slot, a sleeve is secured to the nut, and a synchronization component is provided between the sleeve and the U-shaped component. The synchronization component includes a rotating box, a sliding plate, a connecting plate, and a second spring. The top of the rotating box is rotatably connected to the U-shaped component. The sliding plate is slidably disposed inside the rotating box and passes through the end of the rotating box away from the U-shaped component. The connecting plate is fixedly connected to the sliding plate, and the sliding plate and the connecting plate are arranged in an L-shape. The end of the connecting plate away from the sliding plate is fixedly connected to the sleeve. The second spring is located inside the rotating box, one end of the second spring is fixedly connected to the rotating box, and the other end of the second spring is fixedly connected to the inner wall of the rotating box.

[0014] Preferably, a top cap is fixedly connected to the top of the inner column, and a wire groove is formed at the top of the top cap.

[0015] Preferably, the inner circle of the semi-annular groove has a rounded corner.

[0016] Preferably, the outer diameters of the top ring, outer sleeve assembly, and bottom ring are the same.

[0017] This invention also discloses a method for preparing a porcelain post insulator, applicable to the preparation of the aforementioned porcelain post insulator, which further includes the following steps:

[0018] S1. Prepare the inner column and install the support assembly;

[0019] S2. Fix the top ring at the top of the inner column and install the bottom ring at the bottom of the inner column;

[0020] S3. Use the support components to form an elastic support, install the half set to form the kit, and at the same time assemble the umbrella skirt and tighten the bottom ring.

[0021] The technical effects and advantages of this invention are as follows:

[0022] 1. This invention achieves targeted replacement of single half-set and half-skirt integrated porcelain components by setting up structures such as top ring, bottom ring, and support components. The operation is convenient and the whole process does not require disassembling other integrated porcelain components or insulators, and does not affect the connection between cables and insulators, thus improving the utilization efficiency of porcelain post insulators.

[0023] 2. The first spring and other structures are set up to provide elastic support during disassembly and assembly, preventing the half-body or half-skirt from falling off and facilitating replacement. At the same time, it provides cushioning when the upper and lower half-body pieces fit together to avoid direct hard contact.

[0024] 3. The same kit is spliced ​​from two half kits, and the same umbrella skirt is spliced ​​from two half skirts, minimizing the insulator replacement unit and reducing the later maintenance cost of the insulator;

[0025] 4. By setting up structures such as U-shaped parts, ferrules, and synchronization components, the nuts and bottom rings are synchronously self-locked, ensuring the stability of the insulator in use. At the same time, it serves as a rotating tool, reducing the workload of operators and increasing the flexibility of use. Attached Figure Description

[0026] Figure 1 This is a first-view structural schematic diagram of the ceramic post insulator of the present invention.

[0027] Figure 2 This is a schematic diagram of the ceramic post insulator structure from a second perspective.

[0028] Figure 3 This is a schematic diagram of the third-view structure of the present invention.

[0029] Figure 4 This is a schematic diagram of the inner column and half-skirt structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the inner column and half-set structure of the present invention.

[0031] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle.

[0032] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B.

[0033] Figure 8 This is a schematic diagram of the inner column and top cap structure of the present invention.

[0034] Figure 9 This is a schematic diagram of the half-suit and half-skirt structure of the present invention.

[0035] Figure 10This is a schematic diagram of the inner column and side groove structure of the present invention.

[0036] Figure 11 This is a schematic diagram of the ring and shrinkage groove structure in this invention.

[0037] Figure 12 This is a schematic diagram of the rotating box and sliding plate structure of the present invention.

[0038] In the diagram: 1. Inner column; 2. Half-set; 201. Semi-annular groove; 3. Half-skirt; 4. Middle ring; 5. Shrinkage groove; 6. First spring; 7. Groove; 8. Protrusion; 9. Side groove; 10. Ear block; 11. Top ring; 12. Bottom ring; 13. Rounded corner; 14. Top cap; 15. Wire groove; 16. Threaded rod; 17. Nut; 18. Crossbeam; 19. Slip sleeve; 20. Slot; 21. U-shaped piece; 22. Turning box; 23. Slide plate; 24. Connecting plate; 25. Second spring. Detailed Implementation

[0039] This invention provides, for example Figures 1-12 The porcelain post insulator shown includes an inner post 1. Multiple sets of kits are arranged sequentially along the axial direction of the inner post 1. Each kit is assembled from two half-sets 2. The half-set 2 is semi-circular. A half-skirt 3 is fixedly connected to the outer wall of the half-set 2. The two corresponding half-skirts 3 are fitted together to form an umbrella skirt.

[0040] In actual use, the inner column 1 can be made of high-strength materials, such as stainless steel, and is hollow inside. This reduces the overall weight without affecting the overall strength, making it easier for operators to carry. At the same time, the half-set 2 and the half-skirt 3 are made into an integrated ceramic piece through processes such as isostatic pressing and high-temperature sintering.

[0041] After multiple sets of components and umbrella skirts are assembled sequentially along the axial direction of the inner column 1, the inner column 1 becomes an inner support pillar structure, while the multiple components form an outer porcelain pillar structure. The combination of the inner and outer components ensures the strength of the pillar insulator.

[0042] A top cap 14 is fixedly connected to the top of the inner column 1. A wire groove 15 is provided on the top of the top cap 14. The top cap 14 can also be made of ceramic and is fixed to the top of the inner column 1 by adhesive. Specifically, the cable can be placed in the wire groove 15 and fixed to the top cap 14 by binding, thereby achieving the connection and fixation of the cable and the insulator.

[0043] To facilitate the independent replacement of the integrated ceramic parts 2 and 3 (half-set 2 and half-skirt 3), a support assembly is provided between each pair of adjacent parts. The support assembly includes two central rings 4, which are slidably mounted on the inner column 1. A side groove 9 is formed on the outer wall of the inner column 1. An ear block 10 is fixedly connected to the inner ring of the central ring 4, and the ear block 10 is slidably mounted inside the side groove 9. The side groove 9 and ear block 10 ensure that the central ring 4 can only move along the axial direction of the inner column 1 without rotating. Furthermore, the ear block 10 can be equipped with ball bearings or other structures to ensure smooth sliding within the side groove 9, and can be adjusted according to specific usage requirements.

[0044] The outer diameter of the middle ring 4 is smaller than the outer diameter of the kit. The half-set 2 has a semi-annular groove 201. When the two half-sets 2 are assembled into the kit, the two semi-annular grooves 201 are connected and form an annular groove. The corresponding middle ring 4 can be snapped into the annular groove formed by the two semi-annular grooves 201.

[0045] Reference Figure 6 As shown, when the upper and lower half-sets 2 are close to each other, the middle ring 4 is engaged with the corresponding half-ring groove 201, the two middle rings 4 are close to each other, and the upper and lower half-sets 2 can also be close to each other.

[0046] In actual use, the parts of the two half-sets that fit together are all machined with high precision, resulting in smooth surfaces and a gapless fit when they are close together.

[0047] Both of the two central rings 4 have protrusions 8 fixedly connected to their opposite sides. Multiple protrusions 8 are evenly distributed around the axis of the central ring 4. The half-set 2 has grooves 7 for the protrusions 8 to insert into. When the central ring 4 is engaged with the corresponding half-ring groove 201, the protrusion 8 inserts into the corresponding groove 7, preventing the half-set 2 from sliding randomly along the radial direction of the inner post 1, thus improving the stability of the half-set 2. Simultaneously, it makes the two half-sets 2 in the same kit fit together more tightly, and the two half-skirts 3 in the same umbrella skirt fit together more tightly.

[0048] Furthermore, the joints of the two half-sets 2 in the same kit, and the joints of the two half-skirts 3 in the same umbrella skirt, are all processed with high precision, resulting in smooth surfaces and a gapless fit when they are close together.

[0049] Before leaving the factory, a semi-cured silicone rubber base film can be sprayed onto the splicing area of ​​the two half-skirts 3 to form a tearable interface; when closing the two half-skirts 3, the operator can apply the silicone rubber self-melting tape by hand, which can self-melt and seal the gap in 30 seconds without affecting the performance of the insulator; when inspecting or replacing, the tape and the base film can be peeled off in one piece without affecting the separation of the two half-skirts 3; the above structure can also be used at the splicing area of ​​the two half-sets 2, which can be adjusted according to the specific application.

[0050] To provide elastic support between the two middle rings 4, a contraction groove 5 is provided on the side of the two middle rings 4 that is close to each other. Multiple contraction grooves 5 are provided and are evenly distributed around the axis of the middle ring 4. A first spring 6 is provided between two corresponding contraction grooves 5. The two ends of the first spring 6 are fixedly connected to the inner wall of the two contraction grooves 5 respectively. The first spring 6 is provided so that the two middle rings 4 have elastic support and the elastic force of the first spring 6 is appropriate.

[0051] To lock multiple kits, a top ring 11 is fixedly connected to the top of the inner column 1. The top ring 11 abuts against the topmost half of the kit 2. The top ring 11 can be fixed to the top of the inner column 1 by welding. The outer surface of the top ring 11 is insulated, such as by spraying an epoxy powder coating onto the whole and curing it into a 0.2mm insulating film. The outer diameter of the top ring 11 is the same as the outer diameter of the kit.

[0052] The bottom of the inner column 1 is threaded with a bottom ring 12, which abuts against the bottom half of the sleeve 2. Specifically, the bottom of the outer wall of the inner column 1 is provided with an external thread, and the inner wall of the bottom ring 12 is provided with an internal thread. The internal thread and the external thread are engaged, and the friction coefficient between the internal thread and the external thread is appropriate, so the bottom ring 12 will not rotate at will. At the same time, the outer diameter of the bottom ring 12 is the same as the outer diameter of the top ring 11 and the sleeve.

[0053] Furthermore, grooves 7 and protrusions 8 can be provided between the top of the top half-set 2 and the top ring 11, and between the bottom of the bottom half-set 2 and the bottom ring 12, to further ensure the stability of the top half-set 2 and the bottom half-set 2. This can be adjusted according to the specific usage.

[0054] Reference Figure 8 As shown, after multiple sets of kits and umbrella skirts are assembled and fixed in sequence along the axial direction of the inner column 1, the external thread on the outer wall of the inner column 1 corresponds to the lower half of the bottom ring 12. That is, after rotating the bottom ring 12 to release the fixation of multiple sets of kits and umbrella skirts, the external thread does not affect the downward movement of the kit at the bottommost position.

[0055] During factory assembly, the bottom ring 12 is rotated to move downward on the inner column 1. At this time, under the restoring force of the first spring 6, the two corresponding middle rings 4 move away from each other.

[0056] The operator places multiple half-sets 2 between the upper and lower support components, between the support component at the top and the top ring 11, and between the support component at the bottom and the bottom ring 12 respectively; the middle ring 4 is snapped into the semi-ring groove 201 of the corresponding half-set 2, the protrusion 8 is inserted into the corresponding groove 7, the two half-sets 2 are assembled into a kit, and the two skirts 3 are attached to each other to form an umbrella skirt.

[0057] Furthermore, the inner ring of the semi-annular groove 201 is provided with a rounded corner 13 to facilitate the insertion of the semi-sleeve 2 between the upper and lower support components. Specifically, when the semi-sleeve 2 is inserted between the upper and lower support components, the rounded corner 13 first contacts the protrusion 8, and the end of the protrusion 8 away from the middle ring 4 is set in an arc shape. Due to the contact and compression between the rounded corner 13 and the protrusion 8, the middle ring 4 moves away from the semi-sleeve 2, and then the protrusion 8 is inserted into the interior of the corresponding groove 7, and the middle ring 4 is engaged inside the semi-annular groove 201.

[0058] Next, rotate the bottom ring 12 in the opposite direction to move it upward on the inner column 1. At the same time, the two middle rings 4 in the same support assembly come together and close to each other. The first spring 6 is retracted into the corresponding two shrinkage grooves 5, and the upper and lower half-sleeves 2 also come together to complete the assembly.

[0059] When one of the half-sleeves 2 or 3 is damaged, the operator rotates the bottom ring 12 to move it downward on the inner post 1. At this time, affected by the reset force of the first spring 6, the two middle rings 4 in the same support assembly move away from each other, and the middle ring 4 is still locked into the half-ring groove 201 of the corresponding half-sleeve 2. The protrusion 8 is inserted into the corresponding groove 7, so that the half-sleeve 2 or 3 will not fall off.

[0060] Next, the operator removes the damaged half-set 2 and half-skirt 3 integrated ceramic parts. For example, if the top half-set 2 and half-skirt 3 integrated ceramic parts are damaged, the operator pulls the half-set 2 and half-skirt 3 integrated ceramic parts downwards so that its top is no longer in contact with the top ring 11, and holds the other half-set 2 and half-skirt 3 integrated ceramic parts that are assembled with it so that they do not fall off.

[0061] Then replace the new half-set 2 and half-skirt 3 integrated ceramic parts. During the disassembly and assembly process, due to the setting of the first spring 6 and other structures, elastic support is formed. The operator controls the other half-set 2, half-skirt 3, middle ring 4 and other parts to move downward or upward in an adaptive manner, and they will not fall off due to the elastic support, thereby realizing the targeted replacement of a single set of half-set 2 and half-skirt 3 integrated ceramic parts.

[0062] After replacement, rotate the bottom ring 12 in the opposite direction to move it upward on the inner column 1. At the same time, the two middle rings 4 in the same support assembly come into contact with each other, the first spring 6 is retracted into the corresponding two shrinkage grooves 5, the upper and lower half-sleeves 2 also come into contact with each other, and the gaps can be sealed with silicone rubber self-melting tape.

[0063] The first spring 6 and other structures provide elastic support during disassembly and assembly, preventing the half-body 2 and half-skirt 3 from falling off and facilitating replacement. At the same time, they provide cushioning during the fitting of the upper and lower half-body 2 to avoid direct hard contact.

[0064] This invention, by setting up a top ring 11, a bottom ring 12, a support assembly, and other structures, enables targeted replacement of a single set of half-set 2 and half-skirt 3 integrated porcelain components. The operation is convenient, and the entire process does not require disassembling other integrated porcelain components or insulators, and does not affect the connection between cables and insulators, thereby improving the utilization efficiency of porcelain post insulators.

[0065] The same kit is spliced ​​from two half-sets 2, and the same umbrella skirt is spliced ​​from two half-skirts 3, minimizing the insulator replacement unit and reducing the later maintenance cost of the insulator.

[0066] The bottom end of the inner column 1 is fixedly connected to a threaded rod 16, and a nut 17 is threadedly connected to the threaded rod 16. In actual use, the operator controls the insulator so that the threaded rod 16 is inserted into the mounting hole on the crossarm 18 from top to bottom, and the nut 17 is aligned with the threaded rod 16. Then, the nut 17 is rotated so that it abuts against the lower surface of the crossarm 18, thus fixing the insulator on the crossarm 18.

[0067] Considering that the insulators are installed outdoors and are easily affected by wind and line sway, which may cause the nut 17 and bottom ring 12 to loosen, a slot 20 is provided on the bottom ring 12 to achieve synchronous anti-loosening limit of the nut 17 and bottom ring 12. A U-shaped piece 21 is inserted into the inside of the slot 20, and there can be two slots 20. The two sides of the U-shaped piece 21 are inserted into the two slots 20 respectively (see reference). Figure 1 ).

[0068] A sleeve 19 is snapped onto the nut 17. The inner wall of the sleeve 19 is hexagonal and matches the shape of the nut 17.

[0069] Furthermore, the tightening directions of nut 17 and bottom ring 12 are opposite, as shown in the reference. Figure 2 The bottom ring 12 is tightened by rotating clockwise, while the nut 17 is tightened by rotating counterclockwise.

[0070] A synchronization component is provided between the sleeve 19 and the U-shaped part 21. The synchronization component includes a rotating box 22, a sliding plate 23, a connecting plate 24, and a second spring 25. The top of the rotating box 22 is rotatably connected to the U-shaped part 21. The sliding plate 23 is slidably disposed inside the rotating box 22 and passes through the end of the rotating box 22 away from the U-shaped part 21. The connecting plate 24 is fixedly connected to the sliding plate 23. The sliding plate 23 and the connecting plate 24 are arranged in an L-shape. The end of the connecting plate 24 away from the sliding plate 23 is fixedly connected to the sleeve 19. The second spring 25 is located inside the rotating box 22. One end of the second spring 25 is fixedly connected to the rotating box 22, and the other end of the second spring 25 is fixedly connected to the inner wall of the rotating box 22.

[0071] The rotating box 22, the slide 23, the connecting plate 24, etc. are made of high-strength materials, such as stainless steel; the second spring 25 has appropriate elastic support force, so the slide 23 will not slide freely inside the rotating box 22.

[0072] In actual use, the threaded structure design of the bottom ring 12, threaded rod 16, nut 17, etc., is reasonable, so that when the bottom ring 12 and nut 17 are both in the tightened state, it can achieve... Figure 1 , Figure 2 The states are distributed to ensure the cooperation between the U-shaped part 21, the ferrule 19 and the synchronization component. If necessary, a shim can be used, and adjustments can be made according to the specific usage.

[0073] Specifically, after the insulator is fixedly installed on the crossarm 18, the operator inserts both sides of the U-shaped piece 21 into the two slots 20 respectively (refer to...). Figure 1 Next, rotate the rotating box 22 to tilt it slightly, so that the ferrule 19 and nut 17 are misaligned, without affecting the downward movement of the ferrule 19, and pull down the connecting plate 24. The slide plate 23 slides out from the inside of the rotating box 22 adaptively, and the second spring 25 is stretched. When the ferrule 19 is located below the bottom of the threaded rod 16, the rotating box 22 returns to the vertical position, so that the ferrule 19 corresponds to the nut 17. Release the connecting plate 24, and under the action of the return elastic force of the second spring 25, the ferrule 19 is engaged with the nut 17 and at the same time abuts against the lower surface of the crossbeam 18.

[0074] Since the tightening directions of nut 17 and bottom ring 12 are opposite, refer to Figure 2 The bottom ring 12 is tightened by rotating clockwise, while the nut 17 is tightened by rotating counterclockwise. If the bottom ring 12 becomes loose, it will rotate counterclockwise, which will drive the nut 17 to rotate counterclockwise through the U-shaped part 21, the retaining sleeve 19, and the synchronizing assembly. However, the nut 17 is tightened by rotating counterclockwise, so the bottom ring 12 will not become loose, and the nut 17 will also be prevented from becoming loose, thus achieving the effect of synchronous locking.

[0075] Furthermore, the U-shaped component 21, the retaining sleeve 19, and the synchronization assembly can also be used as tools to rotate the bottom ring 12 and the nut 17, especially during high-altitude installation operations, eliminating the need to carry wrenches and reducing the workload of operators. Specifically, the operator inserts both sides of the U-shaped component 21 into the two slots 20 respectively, with the retaining sleeve 19 and the nut 17 staggered, at which point the bottom ring 12 can be rotated; when the U-shaped component 21, the retaining sleeve 19, and the synchronization assembly are inverted, i.e., the U-shaped component 21 is below the retaining sleeve 19, it can be used to rotate the nut 17.

[0076] By setting up structures such as U-shaped part 21, ferrule 19 and synchronization component, synchronous self-locking of nut 17 and bottom ring 12 is achieved, ensuring the stability of insulator use. At the same time, it serves as a rotating tool, reducing the workload of operators and increasing the flexibility of use.

[0077] This invention also discloses a method for preparing a porcelain post insulator, applicable to the preparation of the aforementioned porcelain post insulator, which further includes the following steps:

[0078] S1. Prepare inner column 1 and install support components;

[0079] S2. Fix the top ring 11 at the top of the inner column 1 and install the bottom ring 12 at the bottom of the inner column 1;

[0080] S3. Use the support components to form an elastic support, insert half of the set 2 to form a kit, and at the same time assemble the umbrella skirt and tighten the bottom ring 12.

Claims

1. A porcelain post insulator, comprising an inner post (1), characterized in that: The inner column (1) is provided with multiple sets of kits arranged sequentially along the axial direction of the inner column (1). The kit is assembled from two half sets (2). Half skirts (3) are fixedly connected to the outer wall of the half set (2). The two corresponding half skirts (3) fit together to form an umbrella skirt. A support assembly is provided between two adjacent kits. The support assembly includes two middle rings (4). The middle rings (4) are slidably disposed on the inner column (1). The half kit (2) is provided with a semi-ring groove (201) for the corresponding middle ring (4) to engage. The two middle rings (4) are provided with a shrinkage groove (5) on the side that is close to each other. A first spring (6) is provided between the two corresponding shrinkage grooves (5). The top of the inner column (1) is fixedly connected to a top ring (11), which abuts against the top half (2). The bottom of the inner column (1) is threadedly connected to a bottom ring (12), which abuts against the bottom half (2).

2. A porcelain post insulator according to claim 1, characterized in that: The shrinkage groove (5) is provided in multiple ways, and the multiple shrinkage grooves (5) are evenly distributed around the axis of the central ring (4).

3. A porcelain post insulator according to claim 1, characterized in that: Both of the two middle rings (4) have protrusions (8) fixedly connected to their opposite sides. There are multiple protrusions (8), and the multiple protrusions (8) are evenly distributed around the axis of the middle ring (4). The half-set (2) has a groove (7) for the protrusions (8) to be inserted.

4. A porcelain post insulator according to claim 1, characterized in that: A side groove (9) is provided on the outer wall of the inner column (1), and an ear block (10) is fixedly connected to the inner ring of the middle ring (4). The ear block (10) is slidably disposed inside the side groove (9).

5. A porcelain post insulator according to claim 1, characterized in that: The bottom end of the inner column (1) is fixedly connected to a threaded rod (16), and a nut (17) is threaded onto the threaded rod (16).

6. A porcelain post insulator according to claim 5, characterized in that: A slot (20) is provided on the bottom ring (12), and a U-shaped piece (21) is inserted into the slot (20). A sleeve (19) is snapped onto the nut (17). A synchronization component is provided between the sleeve (19) and the U-shaped piece (21). The synchronization component includes a rotating box (22), a sliding plate (23), a connecting plate (24), and a second spring (25). The top of the rotating box (22) is rotatably connected to the U-shaped piece (21), and the sliding plate (23) is slidably disposed inside the rotating box (22). The slide plate (23) passes through the end of the rotating box (22) away from the U-shaped part (21). The connecting plate (24) is fixedly connected to the slide plate (23). The slide plate (23) and the connecting plate (24) are arranged in an L-shape. The end of the connecting plate (24) away from the slide plate (23) is fixedly connected to the sleeve (19). The second spring (25) is located inside the rotating box (22). One end of the second spring (25) is fixedly connected to the rotating box (22), and the other end of the second spring (25) is fixedly connected to the inner wall of the rotating box (22).

7. A porcelain post insulator according to claim 1, characterized in that: The top of the inner column (1) is fixedly connected to a top cap (14), and the top of the top cap (14) is provided with a wire groove (15).

8. A porcelain post insulator according to claim 1, characterized in that: The inner ring of the semi-annular groove (201) is provided with a rounded corner (13).

9. A porcelain post insulator according to claim 1, characterized in that: The outer diameters of the top ring (11), outer sleeve assembly, and bottom ring (12) are the same.

10. A method for preparing a porcelain post insulator, characterized in that: The method for preparing the porcelain post insulator as described in claims 1-10 further includes the following steps: S1. Prepare the inner column (1) and install the support assembly; S2. Fix the top ring (11) at the top of the inner column (1) and install the bottom ring (12) at the bottom of the inner column (1). S3. Use the support components to form an elastic support, insert half of the set (2) to form a kit, and at the same time assemble the umbrella skirt and tighten the bottom ring (12).

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