Production process of rod-shaped porcelain insulator for high-speed rail overhead line system

Abstract

The invention discloses a production process of a rod-shaped porcelain insulator for a high-speed rail overhead line system, and relates to the technical field of porcelain insulators. Comprising a mounting base; the insulating mechanism comprises an insulator column, an umbrella skirt, a pantograph and a stain-resistant coating, the cleaning mechanism comprises a cleaning seat, a mounting ring, a cleaning rod, a cleaning brush and a driving mechanism, and the driving mechanism comprises a driving rod, an oscillating spring, a driving gear and an annular rack. The insulator can be driven by vibration formed in the moving process of the pantograph through the arranged oscillation driving type structure, so that the cleaning mechanism rotates, the pollution resistance of the surface of the insulator is improved, growth of fungi can be effectively inhibited through the arranged pollution-resistant coating, the cleanliness of the surface of the insulator is improved, and the service life of the insulator is prolonged. And meanwhile, the stain-resistant coating has a photocatalytic effect, so that stains on the surface of the insulator can be catalytically decomposed.

Description

Technical Field

[0001] This invention relates to the field of porcelain insulator technology, specifically to a manufacturing process for rod-shaped porcelain insulators used in high-speed railway contact networks. Background Technology

[0002] As a crucial component of high-speed railway contact networks, the use of rod-shaped insulators will increase significantly, leading to increasingly stringent requirements for their electromechanical performance. With rising high-speed train speeds, the contact wire tension must be increased to ensure reliable locomotive operation. Data shows that at a train speed of 300 km / h, the conductor tension reaches 30 kN. Due to the increased speed and tension, the mechanical load on the rod-shaped porcelain insulators supporting the conductors increases, requiring a bending failure load of 16 kN. Analysis of existing data indicates that the maximum bending failure load of rod-shaped porcelain insulators supporting conductors on my country's high-speed railways is only 20 kN. However, when the speed of high-speed electrified railways increases to 350 km / h and above, high-strength rod-shaped porcelain insulators with a bending failure load of 25 kN or higher will be necessary to ensure the safety and reliability of high-speed train operation. Xie Xiyun disclosed a rod-shaped porcelain insulator for electrified railway contact networks. It comprises a porcelain body, an upper steel cap, and a lower steel cap. The upper and lower steel caps are bonded to the cylindrical porcelain body at both ends using angular sand and adhesive as bonding layers. The upper steel cap is equipped with a U-shaped clamping plate. The porcelain body formula consists of 20-40% wt bauxite, 40-60% wt clay, and 10-20% wt feldspar. The bauxite, clay, and feldspar are first mixed and then ball-milled. After iron removal, mud removal, aging, and vacuum refining, the mud is made into a clay material. This clay material is then shaped, glazed, sanded, and fired at high temperature. Finally, it is cut, glued, and cured to form the finished product. The technical specifications of this rod-shaped insulator are: maximum bending failure load of 13.8 kN, creepage distance: main insulation ≥ 1200 mm, impulse withstand voltage (standard lightning) ≥ 270 kV, power frequency dry withstand voltage ≥ 160 kV, and artificial pollution withstand voltage ≥ 30 kV. The technology proposed by Xie Xiyun has the following shortcomings: 1. The bending failure load of the rod-shaped porcelain insulators used in railway contact networks is low, and the mechanical strength grade is 16kN, which can only meet the requirements for use in electrified railways with speeds of 250km / h and below, and cannot meet the requirements for high-speed train operation at 350km / h; 2. The impulse withstand voltage (standard lightning) is only greater than 270kV, which will affect the safety of 350km / h high-speed train operation in areas with frequent lightning, especially after a certain period of use and repeated lightning strikes; 3. The artificial pollution withstand voltage is only greater than 30kV, which will cause flashover in heavily polluted areas and sandy areas, affecting train operation safety; 4. The creepage distance (main insulation) is only greater than 1200mm, which is a standard type, umbrella-shaped open, without edges, and easy to clean, but the anti-pollution performance is average.

[0003] To address the aforementioned issues, invention patent CN 105070429 B discloses a manufacturing process for rod-shaped porcelain insulators used in high-speed railway contact networks. This process, through the optimization of raw materials in the formula, produces rod-shaped porcelain insulators for high-speed railway contact networks with excellent electromechanical properties. These insulators exhibit a bending failure load greater than 25kN, a creepage distance of over 1600mm, good anti-pollution performance, and a flashover voltage increased to 36KV. The products also demonstrate high pass rates in porcelain inspection, electrical inspection, and adhesive bonding, resulting in stable production quality. The products meet the requirements for use in high-speed railway contact networks with speeds of 350km / h and above.

[0004] However, the above solutions still have some shortcomings. For example, after long-term use, impurities in rainwater and dust in the air can easily adhere to the surface of the insulator, forming stains, and bacteria can grow on the surface of the insulator, forming bacterial patches. The above solutions cannot easily clean these stains and require a lot of manpower for cleaning, thus affecting maintenance efficiency. Summary of the Invention

[0005] This invention provides a manufacturing process for rod-shaped porcelain insulators used in high-speed railway overhead contact lines to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a manufacturing process for rod-shaped porcelain insulators for high-speed railway contact networks, including a mounting base;

[0007] An insulating mechanism, comprising an insulator post, sheds, a pantograph, and a pollution-resistant coating, wherein the insulator post is mounted on the top of a mounting base, and three sheds are provided, which are equidistantly arranged on the outer wall of the insulator post. The pantograph is fixedly mounted on the top of the insulator post, and the pollution-resistant coating is applied to the outer wall of the insulator post and the surface of the sheds by means of a pollution-resistant coating.

[0008] A cleaning mechanism includes a cleaning seat, a mounting ring, a cleaning rod, and a cleaning brush. The cleaning seat is fixedly installed at the bottom of the insulator post and is located between the insulator post and the mounting seat. The mounting ring is located on the outside of the cleaning seat and is rotatably connected to the cleaning seat. Two cleaning rods are provided and are symmetrically arranged on both sides of the top of the mounting ring. The cleaning brush is located on the outer wall of the cleaning rod.

[0009] The driving mechanism includes a driving rod, an oscillating spring, a driving gear, and a ring rack. The driving rod is fixedly mounted on the top of the mounting base and passes through the insulator post inside the insulator post. The oscillating spring is arranged around the bottom of the cleaning base, and its two ends are fixedly connected to the cleaning base and the mounting base, respectively. The driving gear is located at the bottom of the cleaning base and is rotatably connected to the cleaning base. The ring rack is fixedly mounted inside the mounting ring and is fixedly connected to the mounting ring. The ring rack meshes with the driving gear.

[0010] A further improvement of the technical solution of the present invention is that the driving mechanism further includes a tooth groove and a driven gear, the tooth groove is disposed on the side of the driving rod, the driven gear is disposed on the side of the driving rod, and the driven gear meshes with the tooth groove.

[0011] Using the above technical solution, in this solution

[0012] A further improvement of the technical solution of the present invention is that the driving mechanism further includes a linkage gear, there are two linkage gears, the two linkage gears are arranged perpendicularly to each other, the linkage gear is a bevel gear structure, and the linkage gears are respectively arranged on the side of the driven gear and the top of the driving gear.

[0013] A further improvement of the technical solution of the present invention is that the cleaning mechanism further includes a movable groove, which is arranged around the outside of the cleaning seat, and the cross-section of the movable groove is a "T" shaped structure.

[0014] A further improvement of the technical solution of the present invention is that the cleaning mechanism further includes a clamping block and a moving wheel. The clamping block has a "C" shaped structure, and the clamping block is disposed inside the moving groove through the moving groove. The moving wheel is disposed inside the clamping block.

[0015] A further improvement to the technical solution of this invention lies in the following steps:

[0016] S1. Manufacturing of ceramic parts;

[0017] S2, Ceramic parts glued together;

[0018] S3, Preparation of stain-resistant coatings;

[0019] S4. Spraying of stain-resistant coating.

[0020] A further improvement to the technical solution of this invention is as follows: In step S1, the raw materials entering the factory are inspected and qualified before being stored in the warehouse. Lump raw materials are cleaned, and clay raw materials are carefully selected to control their particle size and iron content. During batching, the moisture content of the raw materials is first measured, followed by batching and weighing, with a batching accuracy controlled to 0.1 kg. The raw materials are fed into the ball mill in order of decreasing quantity, followed by increasing quantity. Then, dispersant, grinding media, and water are added, and the mill is covered and milled for 3-4 hours. The fineness of the slurry is measured, and when the fineness reaches 1.0%-1.5% residue on a 10,000-mesh sieve, the slurry is discharged. The ball-milled slurry is then passed sequentially through 120-mesh, 140-mesh, and 180-mesh vibrating screens into the raw material slurry tank. The raw material slurry is mixed with recycled raw materials at a ratio of 1:3-4 and then stirred in a mixing tank. After uniform stirring, the mixture is removed by a 12000Gs permanent magnet in the iron removal tank. Ironware undergoes continuous iron removal treatment for 20 minutes. After iron removal, the mixed mud slurry is aged for 24 hours and then injected into a mud press to dehydrate to a mud cake of 20-21%. The dehydrated mud cake is then initially kneaded and sent to an aging chamber for 48 hours of aging. The kneaded and aged mud segments are then added to a vacuum kneading machine for extrusion, with the relative vacuum degree controlled above 95%. The extruded mud segments are placed on a shade drying platform for electro-drying to a moisture content of 16-18%. The electro-drying mud segments are then loaded into a shaping machine for trimming and shaping. The trimming and shaping process forms the aforementioned recycled blanks. After shaping, the blanks are sent to a drying room at 110℃ for 10 hours of drying. The dried blanks are then evenly glazed to a thickness of 0.5-0.6 mm. After glazing, the moisture content of the blanks is controlled to be below 4% before loading them onto carts and pushing them into a kiln for firing at 1250℃, thus completing the manufacturing of the porcelain pieces.

[0021] A further improvement of the technical solution of the present invention is that: in S2, after the manufacturing operation of the ceramic part in S1 is completed, the various components of the insulator are assembled together to form the whole insulator.

[0022] A further improvement of the technical solution of this invention lies in the following: the stain-resistant coating in S3 is prepared by a sol-gel method, thereby obtaining a TiO2 nanofilm co-doped with Ag+ and Zn2+. The doped film is uniform and dense, and the white dot-like clusters on the surface are Ag2O with a particle size of about 10 nm. Zn2+ replaces Ti4+ in the TiO2 lattice, and the doped ions can inhibit the growth of TiO2 grains. The antibacterial rate of the doped film is 100% under ultraviolet irradiation and 99.5% under no light irradiation, both of which are significantly better than the undoped film. At the same time, heat treatment of the stain-resistant coating at 500℃ can obtain better antibacterial activity.

[0023] A further improvement of the technical solution of the present invention is that: in step S4, the anti-fouling coating prepared in step S3 is applied to the surface of the ceramic umbrella skirt and the outer wall of the insulator post, and forms an anti-fouling film after solidification.

[0024] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows:

[0025] 1. This invention provides a manufacturing process for rod-shaped porcelain insulators used in high-speed railway contact networks. The oscillation-driven structure can utilize the vibration generated by the pantograph during movement to drive the insulator, thereby causing the cleaning mechanism to rotate and improving the dirt resistance of the insulator surface.

[0026] 2. This invention provides a manufacturing process for rod-shaped porcelain insulators used in high-speed railway contact networks. The anti-fouling coating can effectively inhibit the growth of bacteria, thereby improving the cleanliness of the insulator surface. At the same time, the anti-fouling coating has a photocatalytic effect, which can catalytically decompose the stains on the insulator surface.

[0027] 3. This invention provides a manufacturing process for rod-shaped porcelain insulators used in high-speed railway contact networks. The ring-shaped cleaning mechanism can rotate along the insulator, thereby effectively cleaning the rod-shaped insulator and improving the cleanliness of the insulator surface. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the internal structure of the cleaning seat of the present invention;

[0032] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 3 ;

[0034] Figure 6 This is a schematic diagram of the antifouling coating structure under an electron microscope according to the present invention;

[0035] Figure 7 This is a schematic diagram of the preparation process of the stain-resistant coating of the present invention.

[0036] In the diagram: 1. Mounting base; 2. Insulation mechanism; 201. Insulator post; 202. Umbrella skirt; 203. Pantograph; 204. Anti-fouling coating; 3. Cleaning mechanism; 301. Cleaning seat; 302. Mounting ring; 303. Cleaning rod; 304. Cleaning brush; 305. Moving groove; 306. Clamping block; 307. Moving wheel; 4. Drive mechanism; 401. Drive rod; 402. Oscillating spring; 403. Drive gear; 404. Ring rack; 405. Tooth groove; 406. Driven gear; 407. Linkage gear. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Example 1

[0039] like Figure 1-2 As shown, the present invention provides a manufacturing process for rod-shaped porcelain insulators for high-speed railway contact networks, including a mounting base 1; an insulation mechanism 2, the insulation mechanism 2 including an insulator post 201, sheds 202, a pantograph 203, and a pollution-resistant coating 204. The insulator post 201 is disposed at the top of the mounting base 1, and there are three sheds 202, which are equidistantly disposed on the outer wall of the insulator post 201. The pantograph 203 is fixedly disposed at the top of the insulator post 201, and the pollution-resistant coating 204 is applied to the outer wall of the insulator post 201 and the surface of the sheds 202 by means of a pollution-resistant coating.

[0040] In this embodiment, the insulation mechanism 2 can improve the excellent insulation effect, and the stain-resistant coating 204 can prevent stains from adhering to the surface of the umbrella skirt 202. At the same time, it can inhibit the growth of bacteria on the surface of the umbrella skirt 202, thereby reducing the accident caused by flashover.

[0041] Example 2

[0042] like Figure 1-4As shown, based on Embodiment 1, the present invention provides a technical solution: a cleaning mechanism 3, which includes a cleaning seat 301, a mounting ring 302, cleaning rods 303, and a cleaning brush 304. The cleaning seat 301 is fixedly disposed at the bottom end of the insulator post 201 and is disposed between the insulator post 201 and the mounting base 1. The mounting ring 302 is disposed on the outside of the cleaning seat 301 and is rotatably connected to the cleaning seat 301. Two cleaning rods 303 are provided. The cleaning mechanism 3 is symmetrically arranged on both sides of the top of the mounting ring 302, and the cleaning brush 304 is arranged on the outer wall of the cleaning rod 303; the cleaning mechanism 3 also includes a moving groove 305, which is arranged around the outside of the cleaning seat 301, and the moving groove 305 has a "T" shaped cross-section; the cleaning mechanism 3 also includes a clamping block 306 and a moving wheel 307, the clamping block 306 has a "C" shaped structure, the clamping block 306 passes through the moving groove 305 and is arranged inside the moving groove 305, and the moving wheel 307 is arranged inside the clamping block 306;

[0043] In this embodiment, the cleaning mechanism 3 can be used to clean the surface of the umbrella skirt 202, thereby reducing the adhesion of dust and other impurities.

[0044] Example 3

[0045] like Figure 2-3 As shown, based on Embodiment 1, the present invention provides a technical solution: a driving mechanism 4, which includes a driving rod 401, an oscillating spring 402, a driving gear 403, and a ring rack 404. The driving rod 401 is fixedly disposed at the top of the mounting base 1 and passes through the insulator post 201 and is disposed inside the insulator post 201. The oscillating spring 402 is disposed around the bottom of the cleaning seat 301, and both ends of the oscillating spring 402 are fixedly connected to the cleaning seat 301 and the mounting base 1, respectively. The driving gear 403 is disposed at the bottom of the cleaning seat 301 and is rotatably connected to the cleaning seat 301. The ring rack 404 is fixedly disposed on the mounting base 1. Inside the mounting ring 302, the annular rack 404 is fixedly connected to the mounting ring 302, and the annular rack 404 meshes with the drive gear 403; the drive mechanism 4 also includes a toothed groove 405 and a driven gear 406. The toothed groove 405 is located on the side of the drive rod 401, and the driven gear 406 is located on the side of the drive rod 401. The driven gear 406 meshes with the toothed groove 405; the drive mechanism 4 also includes a linkage gear 407. There are two linkage gears 407, which are arranged perpendicularly to each other. The linkage gears 407 have a bevel gear structure and are respectively located on the side of the driven gear 406 and the top of the drive gear 403.

[0046] In this embodiment, the drive mechanism 4 can utilize the vibration during the operation of the high-speed train. While the device vibrates up and down, the drive rod 401 drives the driven gear 406 to rotate, thereby driving the drive gear 403 to rotate the mounting ring 302 through the linkage gear 407, thus cleaning the surface of the umbrella skirt 202.

[0047] The working principle of the production process of this type of rod-shaped porcelain insulator for high-speed rail contact network will be explained in detail below.

[0048] like Figure 1-7 As shown, during operation, raw materials entering the plant in S1 are inspected and qualified before being stored in the warehouse. Lumpy raw materials are cleaned, and clay raw materials are carefully selected, controlling their particle size and iron content. During batching, the moisture content of the raw materials is first measured, followed by weighing, with a batching accuracy controlled to 0.1 kg. The raw materials are fed into the ball mill in order of decreasing quantity, followed by increasing quantity. Then, dispersant, grinding media, and water are added, and the mill is covered and milled for 3-4 hours. The fineness of the slurry is measured, and when it reaches a fineness of 1.0%-1.5% residue on a 10,000-mesh sieve, it is discharged. The ball-milled slurry is then passed sequentially through 120-mesh, 140-mesh, and 180-mesh vibrating screens into the raw material slurry tank. The raw material slurry is mixed with recycled raw materials at a ratio of 1:3-4 and then added to the mixing tank for stirring. After thorough mixing, it undergoes continuous iron removal treatment for 20 minutes using a 12000Gs permanent magnet separator in the iron removal tank. After iron removal, the mixed slurry is aged for 24 hours and then injected into a mud press for dewatering to 20%. ~21% mud cake, after dewatering, is initially kneaded and then sent to an aging warehouse for 48 hours of aging. The kneaded and aged mud segments are then added to a vacuum kneading machine for extrusion, with the relative vacuum degree controlled above 95%. The extruded mud segments are placed on a shade drying platform for electro-drying until the moisture content is 16-18%. The electro-dried mud segments are then loaded into a shaping machine for trimming and shaping. The trimming and shaping process forms the aforementioned recycled blanks. After shaping, the blanks are sent to a drying room at 110℃ for 10 hours of drying. The dried blanks are then uniformly glazed with 0.5-0.6mm glaze. After glazing, the moisture content of the blanks is controlled below 4% before loading them onto carts and pushing them into a kiln for firing at 1250℃, thus completing the manufacturing of the porcelain part. In S2, after completing the porcelain part manufacturing operation in S1, the various components of the insulator are assembled together to form the whole insulator. In S3, the anti-fouling coating is prepared using the sol-gel method to obtain Ag. + ,Zn 2+ The co-doped TiO2 nanofilm is uniform and dense, with white dot-like clusters of Ag2O on the surface, with a particle size of approximately 10 nm; while Zn... 2+ Replace Ti 4+In the TiO2 lattice, doped ions inhibit TiO2 grain growth. The doped film exhibits 100% antibacterial rate under UV irradiation and 99.5% in the absence of light, both significantly better than the undoped film. Furthermore, heat treatment at 500℃ yields superior antibacterial activity in the stain-resistant coating. During the preparation of the stain-resistant coating, an Ag to Zn ratio of 0.09:0.02 demonstrates excellent photocatalytic efficiency, thus achieving the stain-resistant effect. The table below shows the photocatalytic efficiency for different Ag to Zn doping ratios, and the results are analyzed using the apparent rate constant k. obs To express,

[0049] Table 1. Photocatalytic efficiency of Ag and Zn doping at different ratios

[0050]

[0051]

[0052] In step S4, the anti-fouling coating prepared in step S3 is applied to the surface of the ceramic umbrella skirt 202 and the outer wall of the insulator post 201, and forms an anti-fouling film after solidification.

Claims

1. A rod-shaped porcelain insulator for high-speed railway contact network, comprising a mounting base (1), characterized in that: An insulating mechanism (2) is provided, comprising an insulator post (201), a skirt (202), a pantograph (203), and a dirt-resistant coating (204). The insulator post (201) is located at the top of the mounting base (1). There are three skirts (202), which are equidistantly arranged on the outer wall of the insulator post (201). The pantograph (203) is fixedly located at the top of the insulator post (201). The dirt-resistant coating (204) is applied to the outer wall of the insulator post (201) and the surface of the skirts (202) by means of dirt-resistant coating. The cleaning mechanism (3) includes a cleaning seat (301), a mounting ring (302), a cleaning rod (303), and a cleaning brush (304). The cleaning seat (301) is fixedly installed at the bottom end of the insulator post (201) and is located between the insulator post (201) and the mounting seat (1). The mounting ring (302) is located outside the cleaning seat (301) and is rotatably connected to the cleaning seat (301). There are two cleaning rods (303), which are symmetrically arranged on both sides of the top end of the mounting ring (302). The cleaning brush (304) is located on the outer wall of the cleaning rod (303). The driving mechanism (4) includes a driving rod (401), an oscillating spring (402), a driving gear (403), and a ring rack (404). The driving rod (401) is fixedly mounted on the top of the mounting base (1) and passes through the insulator post (201) and is located inside the insulator post (201). The oscillating spring (402) is arranged around the bottom of the cleaning seat (301) and its two ends are fixedly connected to the cleaning seat (301) and the mounting base (1), respectively. The driving gear (403) is located at the bottom of the cleaning seat (301) and is rotatably connected to the cleaning seat (301). The ring rack (404) is fixedly mounted inside the mounting ring (302) and is fixedly connected to the mounting ring (302). The ring rack (404) meshes with the driving gear (403).

2. The rod-shaped porcelain insulator for high-speed railway contact network according to claim 1, characterized in that: The drive mechanism (4) further includes a tooth groove (405) and a driven gear (406). The tooth groove (405) is disposed on the side of the drive rod (401), and the driven gear (406) is disposed on the side of the drive rod (401). The driven gear (406) meshes with the tooth groove (405).

3. A rod-shaped porcelain insulator for high-speed railway contact networks according to claim 2, characterized in that: The drive mechanism (4) also includes two linkage gears (407), which are arranged perpendicularly to each other. The linkage gears (407) are bevel gears and are respectively arranged on the side of the driven gear (406) and the top of the drive gear (403).

4. A rod-shaped porcelain insulator for high-speed railway contact network according to claim 3, characterized in that: The cleaning mechanism (3) also includes a moving groove (305), which is arranged around the outside of the cleaning seat (301), and the moving groove (305) has a "T" shaped cross-section.

5. A rod-shaped porcelain insulator for high-speed railway contact networks according to claim 4, characterized in that: The cleaning mechanism (3) further includes a clamping block (306) and a moving wheel (307). The clamping block (306) has a "C" shaped structure. The clamping block (306) passes through the moving groove (305) and is disposed inside the moving groove (305). The moving wheel (307) is disposed inside the clamping block (306).

6. The manufacturing process of rod-shaped porcelain insulators for high-speed railway contact networks according to claim 5, characterized in that: Includes the following steps: S1. Manufacturing of ceramic parts; S2, Ceramic parts glued together; S3, Preparation of stain-resistant coatings; S4. Spraying of stain-resistant coating.

7. The manufacturing process of rod-shaped porcelain insulators for high-speed railway contact networks according to claim 6, characterized in that: In S1, raw materials entering the factory are inspected and qualified before being stored. Lumpy raw materials are cleaned, and clay raw materials are carefully selected, controlling their particle size and iron content. During batching, the moisture content of the raw materials is first measured, followed by weighing, with a batching accuracy controlled to 0.1 kg. The raw materials are fed into the ball mill in order of decreasing quantity, followed by increasing quantity. Then, dispersant, grinding media, and water are added, and the mill is covered and milled for 3-4 hours. The fineness of the slurry is measured, and when it reaches a fineness of 1.0%-1.5% residue on a 10,000-mesh sieve, it is discharged. The ball mill slurry is then passed sequentially through 120-mesh, 140-mesh, and 180-mesh vibrating screens into the raw material slurry tank. The raw material slurry is mixed with recycled raw materials at a ratio of 1:3-4 and then stirred in a mixing tank. After thorough mixing, it is continuously passed through a 12000Gs permanent magnet separator in the iron removal tank for 20 minutes. After iron removal, the mixed mud slurry is aged for 24 hours and then injected into a mud press to dehydrate to a mud cake of 20-21%. The dehydrated mud cake is then initially kneaded and sent to an aging chamber for 48 hours of aging. The kneaded and aged mud segments are then added to a vacuum kneading machine for extrusion, with the relative vacuum degree controlled above 95%. The extruded mud segments are placed on a shade drying platform for electro-drying to a moisture content of 16-18%. The electro-drying mud segments are then loaded into a shaping machine for trimming and shaping. The trimming and shaping process forms the aforementioned recycled blanks. After shaping, the blanks are sent to a drying room at 110℃ for 10 hours of drying. The dried blanks are then evenly glazed to a thickness of 0.5-0.6 mm. After glazing, the moisture content of the blanks is controlled to be below 4%, and they are loaded onto carts and pushed into a kiln for firing at 1250℃, thus completing the manufacturing of the porcelain pieces.

8. The manufacturing process of rod-shaped porcelain insulators for high-speed railway contact networks according to claim 6, characterized in that: In step S2, after the ceramic part manufacturing operation in step S1 is completed, the various components of the insulator are assembled together to form the insulator as a whole.

9. The manufacturing process of rod-shaped porcelain insulators for high-speed railway contact networks according to claim 6, characterized in that: The stain-resistant coating in S3 is prepared using the sol-gel method to obtain Ag. + ,Zn 2+ The co-doped TiO2 nanofilm is uniform and dense, with white dot-like clusters of Ag2O on the surface, with a particle size of approximately 10 nm; while Zn... 2+ Replace Ti 4+ When doped ions enter the TiO2 lattice, they can inhibit the growth of TiO2 grains. The antibacterial rate of the doped film is 100% under ultraviolet irradiation and 99.5% under no light, both of which are significantly better than the undoped film. At the same time, heat treatment of the stain-resistant coating at 500℃ can obtain better antibacterial activity.

10. The manufacturing process of a rod-shaped porcelain insulator for high-speed railway contact network according to claim 6, characterized in that: In step S4, the anti-fouling coating prepared in step S3 is applied to the surface of the ceramic umbrella skirt (202) and the outer wall of the insulator post (201), and forms an anti-fouling film after solidification.

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