Preparation process and system of ultralow-temperature heat-conducting basalt fiber yarn

Abstract

The application discloses a preparation process and system of an ultralow-temperature heat-conducting basalt fiber yarn, and the preparation process comprises the following steps: after coating particles enter a target area, the coating particles float; the target area forms a floating area; the basalt fiber yarn moves through the floating area, and the coating particles in the floating area are adhered to the basalt fiber yarn; and after drying, a heat preservation layer is formed on the surface of the basalt fiber yarn. The application can form a heat preservation layer on the surface of the moving basalt fiber yarn, and a high-voltage electric field does not need to be formed between the basalt fiber yarn and the coating particles in the coating process, thereby avoiding a safety hidden danger caused by a continuously changing electric field caused by the continuously moving basalt fiber yarn, and improving the safety of the preparation process.

Description

Technical Field

[0001] This invention relates to the field of fiber production technology, specifically to a process and system for preparing ultra-low temperature thermally conductive basalt fiber filaments. Background Technology

[0002] Basalt fiber is a high-performance continuous fiber material made from basalt ore formed by natural volcanic eruptions through processes such as mineral processing, crushing, melting, drawing, and coating with a sizing agent. Basalt fiber is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide, and titanium dioxide, and possesses a variety of excellent properties including high strength, electrical insulation, corrosion resistance, and high temperature resistance.

[0003] In recent years, basalt fiber has been widely used in various fields such as construction, automobiles, fire protection, and petrochemicals. To improve the thermal insulation performance of basalt fiber, a coating can usually be formed on the surface of the basalt fiber. The coating causes little damage to the structure of the basalt fiber itself, and the coating types are diverse and highly designable.

[0004] In existing technologies, dip coating is mainly used to form an insulating coating on the surface of basalt fibers. However, dip coating requires more paint, resulting in higher production costs. Electrostatic spraying can effectively reduce paint consumption. Electrostatic spraying requires that the basalt fibers and paint particles be charged with positive and negative charges respectively, and a high-voltage electric field is used to attract the paint particles to the surface of the basalt fibers. However, because the basalt fibers, acting as the positive electrode, are constantly moving during the spraying process, the electric field will continuously change, posing a safety hazard to this high-voltage spraying method. Therefore, it is not suitable for spraying moving basalt fibers. Summary of the Invention

[0005] One objective of this invention is to provide a process for preparing ultra-low temperature thermally conductive basalt fiber filaments. This process moves the basalt fiber filaments through a floating zone containing coating particles, allowing the coating particles in the floating zone to adhere to the moving basalt fiber filaments and form a thermal insulation coating. The entire coating process does not rely on a high-voltage electric field between the basalt fiber filaments and the coating particles to drive the coating adsorption, thus eliminating safety hazards at the source and improving the safety of the preparation process.

[0006] This invention is achieved through the following technical solution:

[0007] A process for preparing ultra-low temperature thermally conductive basalt fibers includes the following steps:

[0008] After entering the target area, the paint particles float, forming a floating zone in the target area;

[0009] Basalt fibers move through the floating zone, where coating particles adhere to the basalt fibers. After drying, an insulating layer forms on the surface of the basalt fibers.

[0010] In this technical solution, the basalt fiber filaments move from the wire feeding frame to the wire receiving frame. During the movement, when the basalt fiber filaments pass through the floating area, several coating particles floating in the floating area will adhere to the surface of the basalt fiber filaments, forming a coating film. After the coating film is dried, it can wrap a heat insulation layer on the surface of the basalt fiber filaments.

[0011] In this technical solution, the coating particles can be atomized coating particles sprayed from a paint spray gun using existing technology. Because the coating particles are relatively light, they can float in the air for a certain period. When the basalt fiber filaments enter the floating zone, the coating particles located near the basalt fiber filaments in the floating zone will fall onto the basalt fiber filaments and gradually adhere to them through the adhesive in the coating particles, forming a thin film.

[0012] In some embodiments, the floating zone can be set large enough to prolong the time it takes for the basalt fibers to pass through it, thereby increasing the amount of coating particles adhering to the surface of the basalt fibers and thickening the insulation layer. In some embodiments, the coating particles can be sprayed into the floating zone through one or more atomizing nozzles. In one or more embodiments, the coating particles can move randomly, move in an orderly manner, or remain almost stationary within the floating zone.

[0013] The above process can form a heat-insulating layer on the surface of moving basalt fibers. During the coating process, there is no need to form a high-voltage electric field between the basalt fibers and the coating particles, thus avoiding the safety hazards caused by the continuously changing electric field due to the continuously moving basalt fibers and improving the safety of the preparation process.

[0014] Furthermore, before the basalt fiber enters the floating zone, the surface of the basalt fiber is polished and static electricity is generated on the surface of the basalt fiber.

[0015] In this technical solution, the basalt fiber filaments are pretreated before contacting the coating particles. In some embodiments, a pressure roller can be used to squeeze the surface of the basalt fiber filaments, reducing burrs on the fiber surface and making the surface of the basalt fiber filaments have a more uniform roughness. This makes the ability of coating particles to adhere to the surface of the basalt fiber filaments the same throughout, which is beneficial for obtaining a more uniform insulation layer.

[0016] In this technical solution, static electricity is generated on the surface of the basalt fibers while they are being polished. In one or more embodiments, several bristles can be provided on the surface of the pressure roller. When the pressure roller polishes the fiber surface, the bristles rub against the fiber surface, generating static electricity. After static electricity is generated on the surface of the basalt fibers, they can better capture small-mass paint particles when passing through the floating zone. This allows some paint particles in a wider area around the basalt fibers to move directionally toward the basalt fibers, thereby transforming some of the disordered or stationary paint particles in the floating zone into orderly particles moving toward the basalt fibers, thus improving coating efficiency. In this technical solution, the basalt fiber surface relies on relatively weak static electricity to capture paint particles, and no strong electric field is formed between the basalt fiber surface and the paint particles, ensuring the safety of the process.

[0017] In a preferred embodiment of the preparation process of the present invention, the basalt fiber filaments include several bundles of basalt fiber filaments distributed in a circumferential array. In the floating zone, a circular rotating zone is formed on one or more cross sections along the moving direction of the basalt fiber filaments. The coating particles in the rotating zone move circumferentially along the rotating zone.

[0018] Along the direction of movement of the basalt fibers, the floating zone has several cross-sections. In this technical solution, at least one cross-section of the floating zone has a circular rotating zone. Within the rotating zone, coating particles can move directionally along the circumference of the rotating zone, making the movement of coating particles after entering the floating zone more regular and orderly. Furthermore, the circumferentially moving coating particles can be better concentrated in the rotating zone, significantly reducing the amount of coating particles moving towards other non-rotating cross-sections of the floating zone. By enriching the rotating zone with coating particles, when the basalt fibers pass through the cross-section of the rotating zone, more coating particles can adhere to the surface of the coating particles, thereby significantly improving coating efficiency and increasing coating uniformity.

[0019] In this technical solution, by utilizing the directional movement of coating particles within the rotating zone, after stabilization within the rotating zone, smaller coating particles tend to move closer to the center of the rotating zone, while larger coating particles tend to move closer to the edge of the rotating zone. This allows the smaller coating particles to come into contact with the basalt fiber filaments earlier and adhere to the smaller pores on the surface of the basalt fiber filaments, which is beneficial for improving the uniformity of coating distribution.

[0020] In this technical solution, several bundles of basalt fibers are distributed in a circular array and enter the floating zone. The circular array is coaxial with the rotating zone, so that when the basalt fibers pass through the coating particles moving in the rotating zone, the coating particles of basically the same mass are adhered to each bundle of basalt fibers. This is beneficial for each bundle of basalt fibers to have a basically consistent insulation layer thickness.

[0021] In this technical solution, the coating particles move circumferentially by using multiple coating nozzles to spray coating particles into the floating zone from its cross-section, causing the coating particles to move circumferentially as a whole. In one or more embodiments, the coating nozzles can carry the coating particles into the floating zone via gas for directional movement. In some preferred embodiments, the coating nozzles can be connected to an existing high-pressure airless sprayer to press the coating particles into the floating zone, thereby reducing the influence of gas on the movement of the coating particles and allowing the coating particles to float more orderly within the floating zone.

[0022] In another preferred embodiment of the preparation process of the present invention, some of the coating particles entering the floating zone are positively charged and others are negatively charged. After the positively charged coating particles collide with the negatively charged coating particles, their charges cancel each other out, and the coating particles float in the floating zone.

[0023] In this technical solution, before entering the floating zone, positive or negative ions can be emitted to the paint particles using the electrostatic emission rod of the electrostatic generator, so that the paint particles sprayed from some nozzles are positively charged and the paint particles sprayed from other nozzles are negatively charged.

[0024] In this technical solution, when charged coating particles enter the floating zone, particles with different charges move towards each other, while particles with the same charge move away from each other. Therefore, most coating particles no longer move randomly in the floating zone, but move directionally under the influence of their charges. When positively charged and negatively charged coating particles collide, the positive and negative charges cancel each other out, reducing the kinetic energy of the coating particles. This reduces the random movement of the coating particles in the floating zone, and allows them to move more orderly in the rotating zone, thereby further improving the coating efficiency and uniformity of basalt fibers.

[0025] In this technical solution, since the different charges carried on the coating particles are intended to cause the coating particles to move towards or away from each other in order to reduce the disordered movement of the coating particles toward other cross sections, rather than causing the coating particles to move toward the basalt fiber filaments, the charges carried by the coating particles are also relatively weak, and there is no need to form a high-voltage electric field between them and the basalt fiber filaments.

[0026] Another objective of this invention is to provide an ultra-low temperature thermally conductive basalt fiber preparation system, which can continuously adhere coating particles to moving basalt fiber to form a thermal insulation layer. Since the entire process does not rely on a high-voltage electric field between the coating particles and the basalt fiber to move the coating particles toward the basalt fiber, the entire system is safer.

[0027] This invention is achieved through the following technical solution:

[0028] A system for preparing ultra-low temperature thermally conductive basalt fiber filaments includes a first filament rack for feeding the filaments and a second filament rack for receiving the filaments. A spraying device and a second heating device are sequentially arranged between the first and second filament racks. The spraying device includes a paint nozzle for feeding paint particles into the spraying device. The paint particles float in the spraying device to form a floating zone. The paint particles in the floating zone are used to adhere to the basalt fiber filaments as they move through the floating zone. The second heating device is used to dry the paint particles on the basalt fiber filaments to form a heat insulation layer.

[0029] In this technical solution, basalt fibers move from the first wire frame towards the second wire frame, passing successively through a spraying device and a second heating device. During the spraying process, coating particles adhere to the surface of the basalt fibers. The second heating device then dries the adhered coating particles, resulting in a heat-insulating layer covering the surface of the basalt fibers. In one or more embodiments, the heating temperature of the second heating device is 100–150°C.

[0030] In this technical solution, the spraying device is equipped with one or more nozzles. The nozzles are connected to an external spraying machine or a high-pressure airless spraying machine to input atomized paint particles into the spraying device. After entering the spraying device, the paint particles move randomly or in an ordered manner, floating within the device to form a floating zone. When the basalt fiber filaments pass through the floating zone of the spraying device, the paint particles adhere to the basalt fiber filaments and move into a second heating device to dry, forming an insulation layer.

[0031] Furthermore, along the moving direction of the basalt fiber filaments, at least one cross section of the spraying device is provided with a paint nozzle group consisting of four paint nozzles. The paint nozzles include a main channel for connecting to an external paint source and a main nozzle for connecting to the inside of the spraying device. The positions of the main nozzles of the four paint nozzles are configured such that the four paint nozzles are located on the four sides of the cross section and are close to the four corners of the cross section.

[0032] In this technical solution, four paint nozzles are arranged on one cross-section of the spraying device and distributed circumferentially along the spraying device. Each paint nozzle includes a main channel and a main nozzle. The main channel is located in the housing of the spraying device and is connected to an external spraying machine, thereby introducing paint particles from the spraying machine and spraying them out through the main nozzle into the paint nozzle.

[0033] In this technical solution, the positions of the main nozzles of each paint nozzle are designed to create an orderly and regular flow. Specifically, the four main nozzles are located on the four sides of the cross-section, and are close to the four vertices of the cross-section. In this way, when the four paint nozzles spray paint particles, the paint particles can flow in a clockwise or counterclockwise direction on the cross-section, thereby forming a rotating zone on the cross-section.

[0034] In this technical solution, the flow velocity of the coating particles in the rotating zone is affected by the spray velocity of the coating nozzle. The movement speed of the coating particles can be adjusted as needed. However, the set movement speed needs to enable the coating particles to move smoothly in a clockwise or counterclockwise direction, thereby transforming the disordered movement of most of the coating particles in the floating zone into ordered movement. Unlike the process of making basalt fibers statically charged, the ordered movement of coating particles in the rotating zone allows most of the coating particles in the floating zone to move circumferentially rather than axially, reducing the amount of coating particles moving towards the non-rotating zone section and enriching the coating particles in the rotating zone. On the other hand, the ordered movement of coating particles allows them to be distributed in the rotating zone according to their mass from smallest to largest, with smaller particles closer to the center of the rotating zone and larger particles closer to the edge. This allows the smaller particles to contact the basalt fibers earlier and adhere to the smaller pores on the surface of the basalt fibers by adjusting their movement position, which is beneficial for improving the uniformity of coating distribution.

[0035] Furthermore, the main channel is also connected to an auxiliary nozzle that communicates with the interior of the spraying device. The auxiliary nozzle is inclined toward the main nozzle, and the inclination angle of the auxiliary nozzle is 15° to 45°. Unlike the main nozzle, which sprays paint particles tangentially into the rotating zone, the auxiliary nozzle is mainly used to spray a small amount of paint particles obliquely into the rotating zone, so that the rotating zone can be formed more quickly on the cross-section of the spraying device and the stability of the rotating zone can be improved.

[0036] Furthermore, in any two adjacent coating nozzles of the four coating nozzles, one nozzle outputs positively charged coating particles, while the other outputs negatively charged coating particles. After entering the rotating zone, coating particles with the same charge move away from each other, while those with different charges move closer together. Upon collision, they form larger coating particles with reduced kinetic energy, further reducing the disordered movement of coating particles in the floating zone towards random directions. Under the influence of other coating particles, a stable rotating zone is formed more quickly, further improving the coating efficiency and uniformity of the basalt fibers.

[0037] Furthermore, the spraying device is connected to a wire guide disk, which is provided with a plurality of wire guide holes distributed circumferentially, and the wire guide holes are used for basalt fiber filaments to move through and enter the spraying device.

[0038] In this technical solution, before entering the guide wire disk, each basalt fiber can pass side by side through the soaking device, the first heating device, and the polishing device. After exiting the polishing device, each basalt fiber passes through the guide wire holes distributed in a circular array on the guide wire disk, and then the basalt fibers enter the spraying device in a circular array arrangement.

[0039] In this technical solution, the basalt fiber filaments are arranged in a circular array and enter the floating zone using a guide disc. This ensures that when the basalt fiber filaments pass through the coating particles moving in the rotating zone, the coating particles of the same mass are basically adhered to each bundle of basalt fiber filaments, which is beneficial for each bundle of basalt fiber filaments to have a basically consistent insulation layer thickness.

[0040] Furthermore, a rotating shaft is connected to the guide wire disc, and a drive tooth is provided on the rotating shaft. The rotating shaft is movably connected to the spraying device, and a linear drive device is provided on the spraying device. A rack that meshes with the drive tooth is provided on the output end of the linear drive device.

[0041] In this technical solution, the linear drive device can be a linear motor or a hydraulic pump. Its output end, such as on a piston rod, can be directly equipped with a rack, or indirectly equipped on a drive rod connected to the output end. The guide wire disc's shaft can be mounted on the wire inlet side of the spraying device via bearings. By setting drive teeth on the shaft that mesh with the rack, the linear drive device can rotate the shaft by a certain angle, thereby deflecting the basalt fiber filaments passing through the guide wire hole by a certain angle, for example, 2-5°. This allows the basalt fiber filaments to produce a small amplitude of swaying during movement, enabling them to contact more paint particles and allowing the paint particles to adhere more evenly to the basalt fiber filaments.

[0042] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0043] 1. This invention can form a heat-insulating layer on the surface of moving basalt fiber filaments. During the coating process, there is no need to form a high-voltage electric field between the basalt fiber filaments and the coating particles, thereby avoiding the safety hazards caused by the continuously changing electric field due to the continuously moving basalt fiber filaments and improving the safety of the preparation process.

[0044] 2. By forming a rotating zone on one or more cross sections within the floating zone, this invention not only makes the movement of paint particles after entering the floating zone more regular and orderly, but also allows the circumferentially moving paint particles to be better concentrated in the rotating zone, thereby significantly reducing the amount of paint particles moving toward other non-rotating cross sections of the floating zone.

[0045] 3. The present invention enables the coating particles to be distributed in the rotating zone according to their mass from small to large by orderly movement within the rotating zone. This allows the smaller coating particles to come into contact with the basalt fiber filaments earlier and adhere to the smaller pores on the surface of the basalt fiber filaments by adjusting the movement position of the basalt fiber filaments, which is beneficial to improving the uniformity of coating distribution.

[0046] 4. This invention, by assigning different charges to the sprayed coating particles, causes most of the coating particles to no longer move randomly in the floating zone, but to move in a direction under the influence of the charge, thereby reducing the disordered movement of coating particles in random directions in the floating zone and further improving the coating efficiency and uniformity of basalt fibers.

[0047] 5. By polishing the surface of basalt fibers, this invention can reduce burrs on the fiber surface and make the surface of basalt fibers more uniform in roughness. At the same time, the brush bristles on the pressure roller generate static electricity on the surface of basalt fibers, thereby transforming some of the disordered or stationary coating particles in the floating area into orderly movements toward the basalt fibers, thus improving coating efficiency. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0049] Figure 1 This is a flowchart of the preparation process in a specific embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the preparation system in a specific embodiment of the present invention;

[0051] Figure 3 This is a schematic diagram of the spraying device in a specific embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of the cross-section of the spraying device with paint nozzles in a specific embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the cooperation between the guide wire disk and the linear drive device from one perspective in a specific embodiment of the present invention;

[0054] Figure 6 This is a schematic diagram of the cooperation between the guide wire disk and the linear drive device from another perspective in a specific embodiment of the present invention;

[0055] Figure 7 This is a schematic diagram of the grinding device in a specific embodiment of the present invention;

[0056] Figure 8This is a schematic diagram of the structure of the basalt fiber filaments obtained in a specific embodiment of the present invention.

[0057] The attached diagram shows the markings and corresponding component names:

[0058] 1-Spraying device, 11-First paint nozzle, 111-First main channel, 112-First main nozzle, 113-First auxiliary nozzle, 12-Second paint nozzle, 121-Second main channel, 122-Second main nozzle, 123-Second auxiliary nozzle, 13-Floating zone, 131-Rotating zone, 2-Grinding device, 21-First pressure roller, 22-Second pressure roller, 23-Brush bristles, 3-Soaking device, 4-First heating device, 5-Second heating device, 6-First wire frame, 7-Second wire frame, 8-Tensioning wheel device, 9-Basalt fiber, 10-Insulation layer, 200-Wire guide disc, 201-Wire guide hole, 202-Rotating shaft, 203-Drive gear, 300-Linear drive device, 301-Drive rod, 302-Rack. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0060] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0061] Example 1:

[0062] like Figure 1 The process for preparing ultra-low temperature thermally conductive basalt fibers, as shown, includes the following steps:

[0063] After entering the target area, the paint particles float, forming a floating zone in the target area;

[0064] Polish the surface of the basalt fiber filaments and generate static electricity on the surface of the basalt fiber filaments;

[0065] Basalt fibers move through the floating zone, where coating particles adhere to the basalt fibers. After drying, an insulating layer forms on the surface of the basalt fibers.

[0066] In some embodiments, the floating zone can be set large enough to prolong the time it takes for the basalt fibers to pass through it, thereby increasing the amount of coating particles adhering to the surface of the basalt fibers and thickening the insulation layer. In some embodiments, the coating particles can be sprayed into the floating zone through one or more atomizing nozzles. In one or more embodiments, the coating particles can move randomly, move in an orderly manner, or remain almost stationary within the floating zone.

[0067] In some embodiments, the drying temperature of the insulation layer is 100–150°C.

[0068] In some embodiments, the coating particles are preferably ceramic coatings, which may be carbide ceramic coatings, oxide ceramic coatings, or nitride ceramic coatings.

[0069] In some preferred embodiments, before polishing the basalt fiber filaments, an impregnating agent, such as a plasma silane anti-corrosion impregnating agent, can be used to impregnate the basalt fiber filaments to modify their surface, improve the wettability and roughness of the basalt fiber filament surface, and increase the contact area between the basalt fiber filaments and the coating particles. In some preferred embodiments, after impregnating the basalt fiber filaments, the surface of the basalt fiber filaments can be heated to expand the porosity of the heated basalt fiber filament surface, which is beneficial for subsequent polishing of the basalt fiber filament surface.

[0070] Example 2:

[0071] Based on Example 1, such as Figure 3 and Figure 4 As shown, the basalt fiber filaments include several bundles of basalt fiber filaments 9 arranged in a circumferential array. In the floating zone, a circular rotating zone 131 is formed on one or more cross sections along the moving direction of the basalt fiber filaments 9. The coating particles in the rotating zone 131 move circumferentially along the rotating zone 131.

[0072] In this embodiment, by utilizing the directional movement of coating particles within the rotating zone, after stabilization within the rotating zone, smaller coating particles tend to move closer to the center of the rotating zone, while larger coating particles tend to move closer to the edge of the rotating zone. This allows the smaller coating particles to come into contact with the basalt fiber filaments earlier and adhere to the smaller pores on the surface of the basalt fiber filaments, which is beneficial for improving the uniformity of coating distribution.

[0073] In one or more embodiments, basalt fibers may also be introduced into the floating zone side by side.

[0074] In some preferred embodiments, among the coating particles entering the floating zone 13, some particles carry a positive charge and others carry a negative charge. When the positively charged particles collide with the negatively charged particles, their charges cancel each other out, and the particles float in the floating zone 13. When charged particles enter the floating zone, particles with different charges move towards each other, while particles with the same charge move away from each other. Therefore, most particles no longer move randomly within the floating zone but move directionally under the influence of their charges. When positively charged and negatively charged particles collide, the positive and negative charges cancel each other out, reducing the kinetic energy of the particles and decreasing their random movement in the floating zone. Furthermore, the particles can move more orderly within the rotating zone, thereby further improving the coating efficiency and uniformity of the basalt fibers.

[0075] Example 3:

[0076] like Figure 2 The system for preparing ultra-low temperature thermally conductive basalt fiber filaments includes a first wire frame 6 for feeding the filaments and a second wire frame 7 for receiving the filaments. A spraying device 1 and a second heating device 5 are sequentially arranged between the first wire frame 6 and the second wire frame 7. The spraying device 1 includes a paint nozzle for feeding paint particles into the spraying device 1. The paint particles float in the spraying device 1 to form a floating zone 13. The paint particles in the floating zone 13 are used to adhere to the basalt fiber filaments 9 when they move through the floating zone 13. The second heating device 5 is used to dry the paint particles on the basalt fiber filaments 9 to form a heat insulation layer 10.

[0077] In one or more embodiments, at least one tensioning wheel device 8 is also provided on the movement path of the basalt fiber filament to give the moving basalt fiber filament the desired tension.

[0078] In some preferred embodiments, an immersion device 3 is further provided between the first wire frame and the spraying device. This immersion device holds a wetting agent to modify the surface of the passing basalt fiber filaments, improving their wettability and roughness, and increasing the contact area between the basalt fiber filaments and the coating particles. In one or more embodiments, a first heating device is provided after the immersion device along the direction of movement of the basalt fiber filaments. This first heating device heats the surface of the basalt fiber filaments, expanding the pores on the surface and facilitating subsequent polishing. In one or more embodiments, the heating temperature of the first heating device is 50–70°C.

[0079] In some embodiments, a polishing device 2 is also provided between the first heating device and the spraying device along the moving direction of the basalt fiber filaments, such as... Figure 7 As shown, the polishing device includes a first pressure roller 21 and a second pressure roller 22, with several brush bristles 23 arranged side by side on the two rollers. When the basalt fiber filaments pass between the two rows of pressure rollers, the rollers squeeze the surface of the basalt fiber filaments, reducing burrs on the fiber surface and making the surface of the basalt fiber filaments have a more uniform roughness. At the same time, the brush bristles rub against the surface of the basalt fiber filaments, causing static electricity to be generated on the surface of the basalt fiber filaments. This allows the disordered or stationary paint particles near the basalt fiber filaments to move towards the basalt fiber filaments under the action of static electricity, thereby improving the coating efficiency.

[0080] In some preferred embodiments, along the moving direction of the basalt fiber 9, at least one cross-section of the spraying device 1 is provided with a paint nozzle group consisting of four paint nozzles, such as... Figure 4 As shown, the paint nozzle includes a main channel for connecting to an external paint source and a main nozzle for connecting to the inside of the spraying device 1. The positions of the main nozzles of the four paint nozzles are configured such that the four paint nozzles are located on the four sides of the cross section and are close to the four corners of the cross section.

[0081] In some preferred embodiments, the main channel is also connected to an auxiliary nozzle that communicates with the interior of the spraying device (1). The auxiliary nozzle is inclined toward the main nozzle, and the inclination angle of the auxiliary nozzle is 15-45°. Unlike the main nozzle, which sprays paint particles tangentially into the rotating zone, the auxiliary nozzle is mainly used to spray a small amount of paint particles obliquely into the rotating zone, so that the rotating zone can be formed more quickly on the cross-section of the spraying device and the stability of the rotating zone can be improved.

[0082] Example 4:

[0083] Based on the above embodiment, in two adjacent paint nozzles of the four paint nozzles, one nozzle outputs paint particles with a positive charge, and the other nozzle outputs paint particles with a negative charge. For example, as... Figure 4 As shown, the first paint nozzle is used to input positively charged paint particles into the cross-section, and includes a first main nozzle 112, a first auxiliary nozzle 113, and a first main channel 111; the second paint nozzle is used to input negatively charged paint particles into the cross-section, and includes a second main nozzle 122, a second auxiliary nozzle 123, and a second main channel 121; and so on, the third paint nozzle, which is distributed counterclockwise and adjacent to the second paint nozzle, inputs positively charged paint particles, and the fourth paint nozzle between the third paint nozzle and the first paint nozzle inputs positively loaded paint particles, thereby forming paint particles moving in a counterclockwise direction in the rotating zone.

[0084] After the coating particles enter the rotating zone, coating particles with the same charge move away from each other, while coating particles with different charges move closer to each other. After collision, they form coating particles with larger mass and reduced kinetic energy, which further reduces the disordered movement of coating particles in the floating zone towards random directions. Under the influence of other coating particles, a stable rotating zone is formed more quickly, which further improves the coating efficiency and uniformity of basalt fiber filaments.

[0085] Example 5:

[0086] Based on the above embodiments, the spraying device 1 is connected to a wire guide disk 200, the wire guide disk 200 is provided with a plurality of wire guide holes 201 distributed circumferentially, the wire guide holes 201 are used for basalt fiber filaments 9 to move through and enter the spraying device 1, the wire guide disk 200 is connected to a rotating shaft 202, the rotating shaft 202 is provided with a drive tooth 203, the rotating shaft 202 is movably connected to the spraying device 1, the spraying device 1 is provided with a linear drive device 300, the output end of the linear drive device 300 is provided with a rack 302 that meshes with the drive tooth 203.

[0087] In one or more embodiments, the linear drive device may be a linear motor or a hydraulic pump.

[0088] In this embodiment, a linear drive device can be used to rotate the shaft by a certain angle, thereby deflecting the basalt fiber filament passing through the guide wire hole by a certain angle, such as 2 to 5 degrees. This allows the basalt fiber filament to sway slightly during movement, enabling it to come into contact with more coating particles and allowing the coating particles to adhere more evenly to the basalt fiber filament.

[0089] The terms "first," "second," etc., used in this invention (e.g., first paint nozzle, second paint nozzle, first pressure roller, second pressure roller, etc.) are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" used in this invention, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0090] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A process for preparing ultra-low temperature thermally conductive basalt fiber filaments, characterized in that, Includes the following steps: After entering the target area, the paint particles float, forming a floating zone (13). Basalt fiber filaments (9) move through the floating zone (13), and the coating particles in the floating zone (13) adhere to the basalt fiber filaments (9). After drying, a heat insulation layer (10) is formed on the surface of the basalt fiber filaments (9). Before the basalt fiber filaments (9) enter the floating zone, the surface of the basalt fiber filaments (9) is polished and static electricity is generated on the surface of the basalt fiber filaments (9). The basalt fiber filament (9) includes several bundles of basalt fiber filaments (9) arranged in a circumferential array. In the floating zone (13), a circular rotating zone (131) is formed on one or more cross sections along the moving direction of the basalt fiber filament (9). The coating particles in the rotating zone (131) move circumferentially along the rotating zone (131).

2. The process for preparing ultra-low temperature thermally conductive basalt fiber filaments according to claim 1, characterized in that, Among the paint particles that enter the floating zone (13), some paint particles are positively charged and others are negatively charged. The positively charged paint particles and the negatively charged paint particles collide and cancel each other out, and the paint particles float in the floating zone (13).

3. A system for preparing ultra-low temperature thermally conductive basalt fiber filaments, comprising a first filament holder (6) for feeding the filaments and a second filament holder (7) for taking the filaments in, characterized in that, A spraying device (1) and a second heating device (5) are sequentially arranged between the first wire frame (6) and the second wire frame (7). The spraying device (1) includes a paint nozzle, which is used to input paint particles into the spraying device (1). The paint particles float in the spraying device (1) to form a floating zone (13). The paint particles in the floating zone (13) are used to adhere to the basalt fiber filament (9) when it moves through the floating zone (13). The second heating device (5) is used to dry the paint particles on the basalt fiber filament (9) to form a heat insulation layer (10). Along the moving direction of the basalt fiber filament (9), at least one cross section of the spraying device (1) is provided with a paint nozzle group consisting of four paint nozzles. The paint nozzle includes a main channel for connecting to an external paint source and a main nozzle for connecting to the interior of the spraying device (1). The positions of the main nozzles of the four paint nozzles are configured such that the four paint nozzles are located on the four sides of the cross section and are close to the four corners of the cross section.

4. The ultra-low temperature thermally conductive basalt fiber preparation system according to claim 3, characterized in that, The main channel is also connected to an auxiliary nozzle that communicates with the interior of the spraying device (1). The auxiliary nozzle is inclined toward the main nozzle, and the inclination angle of the auxiliary nozzle is 15~45°.

5. The ultra-low temperature thermally conductive basalt fiber preparation system according to claim 3, characterized in that, Of the four paint nozzles, one nozzle outputs paint particles with a positive charge, while the other nozzle outputs paint particles with a negative charge.

6. The ultra-low temperature thermally conductive basalt fiber preparation system according to claim 3, characterized in that, The spraying device (1) is connected to a wire guide disk (200), and the wire guide disk (200) is provided with a plurality of wire guide holes (201) distributed along the circumference. The wire guide holes (201) are used for the basalt fiber filaments (9) to move through and enter the spraying device (1).

7. The ultra-low temperature thermally conductive basalt fiber preparation system according to claim 6, characterized in that, The guide wire disc (200) is connected to a rotating shaft (202), and a drive tooth (203) is provided on the rotating shaft (202). The rotating shaft (202) is movably connected to the spraying device (1). The spraying device (1) is provided with a linear drive device (300), and a rack (302) that meshes with the drive tooth (203) is provided on the output end of the linear drive device (300).

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