A process for preparing cosmic ray-resistant and high-temperature-resistant cables

Abstract

The present invention relates to the technical field of cable preparation, and specifically to a process for preparing a cosmic ray-resistant and high-temperature resistant cable, which includes an extrusion chamber with a conical structure formed in a first extrusion hood and a second extrusion hood, a circular extrusion port formed at the connection between the first extrusion hood and the second extrusion hood and a coating cylinder, and a cable passing through the extrusion port. One end of the extrusion chamber is connected to a buffer cylinder, and the other end is connected to the coating cylinder. The place where the extrusion chamber is connected to the coating cylinder forms a circular extrusion port. The connection between the first extrusion hood and the second extrusion hood and the coating cylinder is respectively provided with seals in a symmetrical layout. The seals are all conical structures, and the opposite end of the two seals is the narrower end of the conical structure. The narrower end of the seal extends a distance toward the front end to form a circular sealing portion.

Description

Technical Field

[0001] The present invention relates to the technical field of cable preparation, in particular to a process for preparing a cosmic ray-resistant and high-temperature-resistant cable. Background Art

[0002] Cross-linked polyethylene (XLPE) insulated power cables are essential equipment for transmitting electrical energy. Their primary function is to provide reliable electrical connections between various electrical devices and minimize power loss during transmission. With the increasing demand for electricity and the expansion of power grids, the design, manufacturing, and application technologies of insulated power cables are also evolving.

[0003] In cable production, "oiling" typically involves passing the cable through an oil bath, coating it with oil. This process is primarily used in the manufacture of certain types of cables, particularly those that require an additional protective layer to improve performance or extend their service life.

[0004] Oiling is an essential step in the production of cross-linked polyethylene (XLPE) insulated power cables. Traditionally, this method relies on a pump to inject oil into an oil channel, then pass the cable through the channel to coat the cable. However, this approach has significant drawbacks: insufficient pump pressure can lead to uneven oil coating on the cable surface, compromising insulation performance. Conversely, excessive pressure can easily cause oil to overflow from both ends of the channel, wasting material and increasing subsequent cleaning and maintenance workload.

[0005] Based on this, the present invention discloses a process for preparing a cosmic ray-resistant and high-temperature-resistant cable. Summary of the Invention

[0006] In order to solve the problem in the oil treatment technology of cross-linked polyethylene insulated power cable proposed in the background technology, that insufficient oil pump pressure will lead to uneven cable coating, while excessive pressure will easily cause oil overflow and waste, affecting the coating quality and material consumption, the present invention provides a preparation process for cosmic ray-resistant and high-temperature resistant cables, which includes an oiling device and an oiling trough. The oiling device is provided with a oiling pump body, and oil is injected into the oiling trough through the oiling pump body. The cable passes through the oiling trough. A first extrusion cover and a second extrusion cover are symmetrically arranged in the oiling trough. The first extrusion cover and the second extrusion cover are conical structures, and the first extrusion cover and the second extrusion cover are connected through a coating cylinder.

[0007] As a further improvement of the present technical solution, a first buffer cylinder and a second buffer cylinder are symmetrically fixed on both sides of the oil trough cylinder. A shuttle hole larger than the outer diameter of the cable is opened in the center of the first buffer cylinder and the second buffer cylinder. The first extrusion cover and the second extrusion cover are connected to the first buffer cylinder and the second buffer cylinder at one end away from the coating cylinder, respectively. The tops of the first buffer cylinder and the second buffer cylinder are connected to the first oil filling pipe, and the bottoms of the first buffer cylinder and the second buffer cylinder are connected to the second oil filling pipe. The first oil filling pipe and the second oil filling pipe are both connected to the refueling pump body.

[0008] In this technical solution, in order to improve the coating uniformity during the coating of the ointment, an extrusion cover is designed to extrude the ointment in a circular ring structure, so that the coating uniformity can be improved when the cable passes through;

[0009] In this technical solution, a conical extrusion chamber is formed in the first extrusion cover and the second extrusion cover. The first extrusion cover and the second extrusion cover are connected to the coating cylinder to form a circular extrusion port. The cable passes through the extrusion port. One end of the extrusion chamber is connected to the buffer cylinder, and the other end is connected to the coating cylinder. The place where the extrusion chamber is connected to the coating cylinder forms a circular extrusion port.

[0010] The first oil injection pipe and the second oil injection pipe are connected by the upper and lower parts respectively to realize synchronous oil injection in both directions, ensuring dynamic balance of oil pressure; the first extrusion cover and the second extrusion cover have a symmetrical conical structure, forming an extrusion chamber inside, and the end is connected to the coating cylinder to form a circular extrusion port, guiding the oil paste to wrap the cable in annular laminar flow.

[0011] On this basis, after the coating is evenly applied, in order to achieve sealing at both ends of the coating barrel, the rear end where the cable passes through can play a certain role in scraping oil;

[0012] As a further improvement of the present technical solution, the first extrusion hood and the second extrusion hood are respectively provided with symmetrically arranged seals at the connection points with the coating cylinder. The seals are all conical structures, and the opposite ends of the two seals are the narrower ends of the conical structure. The narrower end of the seal extends a distance toward the front end to form a circular ring sealing portion.

[0013] As a further improvement of the present technical solution, the seals are respectively a first seal arranged in the first extrusion cover and a second seal arranged in the second extrusion cover, and the first seal and the second seal are both located in the coating cylinder, the inclined surfaces of the conical structures around the first seal and the second seal are made of soft material, and the sealing parts of the cylindrical structures of the first seal and the second seal are made of hard material.

[0014] As a further improvement of this technical solution, the inner diameter of the narrower end of the conical structure of the first seal and the second seal is adapted to the outer diameter of the cable, and the inner diameter of the narrower end of the conical structure of the second seal is smaller than the inner diameter of the narrower end of the conical structure of the first seal.

[0015] The flexible inclined surface is deformed under pressure to push the sealing part to expand, and when the oil pressure increases, it abuts the buffer tube to achieve dynamic sealing; the inner diameter of the second seal is slightly smaller than the outer diameter of the cable, and the hard seal scrapes off excess oil; secondly, the scraping component in the second extrusion cover has a higher degree of tightness, forming a secondary oil scraping barrier.

[0016] After the first layer of sealing of the seal, subsequent protection is required to improve the sealing performance in long-term use, and at the same time assist in scraping oil from the sealing part adjacent to the second extrusion cover;

[0017] As a further improvement of the present technical solution, scraping components with different degrees of fastening for the cables to pass through are provided in both the first extrusion cover and the second extrusion cover.

[0018] As a further improvement of the present technical solution, the scraping assembly includes two symmetrically arranged scraping plates, which form a conical structure, and elastic telescopic rods are provided on the scraping plates. The scraping plates are connected to the inner wall of the extrusion cover through the elastic telescopic rods. It should be added that the inner diameter of the narrower end of the conical structure formed by the two scraping plates is adapted to the outer diameter of the cable, and the degree of tightness of the scraping assembly in the first extrusion cover to the cable is less than the degree of tightness of the scraping assembly in the second extrusion cover to the cable.

[0019] In order to reduce the resistance of the cable running between the scraping component and the seal, and at the same time play the role of replicating the seal to block the overflow of the ointment;

[0020] As a further improvement of the present technical solution, a buffer assembly is provided in the first extrusion cover and the second extrusion cover at one end of the first seal and the second seal away from the coating cylinder, and the scraping assembly is connected to the seal through the buffer assembly.

[0021] As a further improvement of the present technical solution, the buffer assembly includes a buffer tube that is adapted to the inner diameter of the narrower end of the conical structure of the scraping assembly. Several groups of first roller groups and second roller groups are arranged at equal intervals along the axial direction in the buffer tube. The first roller group and the second roller group both contain several rollers that are arranged in the buffer tube for circumferential rotation. The rollers in the first roller group and the second roller group are arranged in an staggered manner, and the roller widths of the first roller group and the second roller group are adapted to the intervals between the two sides of the rollers. The circular structure formed by the part where the roller contacts the cable is adapted to the inner diameter of the narrower end of the conical structure of the scraping assembly.

[0022] As a further improvement of the present technical solution, the outer diameter of the sealing portion is between the inner diameter and the outer diameter of the buffer tube.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This process for preparing cosmic-ray-resistant and high-temperature-resistant cables achieves uniform pressure distribution and improved coating quality. By providing a first and second buffer cylinder and simultaneously injecting grease from both ends (via first and second oil injection pipes), the pressure of the grease entering the first and second extrusion hoods is more uniform. This ensures that the cable is more evenly coated with the grease as it passes through the coating cylinders, avoiding uneven coating caused by uneven pressure. Furthermore, since excessive pressure is not required to ensure effective coating, the risk of grease overflow is reduced, improving material utilization.

[0025] 2. In the preparation process of this cosmic ray-resistant and high-temperature resistant cable, annular structure grease extrusion is achieved. The conical extrusion chamber design within the first extrusion cover and the second extrusion cover allows the grease to be extruded in an annular structure and coated around the cable. This not only enhances the consistency and integrity of the coating, but also reduces the pressure requirement for the refueling pump body, further optimizing resource utilization efficiency.

[0026] 3. In the preparation process of this cosmic ray-resistant and high-temperature resistant cable, the sealing and scraping functions are integrated. The design of the first seal and the second seal, especially the circular sealing part and the inclined surface of the soft material, as well as the application of the scraping component, realize the effective sealing and secondary oil scraping treatment of the cable, which not only effectively prevents the overflow of the ointment, but also ensures the formation of a thin and uniform ointment layer on the cable surface, thereby improving the insulation performance of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic structural diagram of the oil-passing drum of the present invention;

[0029] Figure 3 This is a cross-sectional view of the structure of the oil-passing groove drum of the present invention;

[0030] Figure 4 It is a structural cross-sectional view of the extrusion cover of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the scraping assembly of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the buffer assembly of the present invention;

[0033] Figure 7 It is a front view of the structure of the buffer assembly of the present invention;

[0034] Figure 8 is a structural cross-sectional view of the first sealing member of the present invention;

[0035] Figure 9 for Figure 8 A magnified view of the structure at point A in the middle.

[0036] The meaning of each number in the figure is:

[0037] 1. Oiling device; 2. Fueling pump body; 3. Oiling channel; 4. First oiling pipe; 5. Second oiling pipe; 6. Shuttle hole; 7. First buffer cylinder; 8. First extrusion cover; 9. Coating cylinder; 10. Second extrusion cover; 11. Second buffer cylinder; 12. Extrusion chamber; 13. Coating chamber; 14. Scraping assembly; 15. Buffer assembly; 16. First seal; 17. Second seal

[0038] 141. scraper plate; 142. elastic telescopic rod;

[0039] 151. Buffer tube; 152. First roller group; 153. Second roller group. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the existing oil treatment technology for cross-linked polyethylene insulated power cables, insufficient oil pump pressure will lead to uneven cable coating, while excessive pressure will easily cause oil overflow and waste, affecting coating quality and material consumption.

[0042] To this end, the present invention provides a process for preparing a cosmic ray-resistant and high-temperature-resistant cable. Figures 1-4As shown, it includes an oil passing device 1 and an oil passing trough 3. The oil passing device 1 is provided with a refueling pump body 2. The oil is injected into the oil passing trough 3 through the refueling pump body 2, and the cable passes through the oil passing trough 3. The first extrusion cover 8 and the second extrusion cover 10 are symmetrically arranged in the oil passing trough 3. The first extrusion cover 8 and the second extrusion cover 10 are conical structures. The first extrusion cover 8 and the second extrusion cover 10 are connected through the coating cylinder 9. Secondly, the first buffer cylinder 7 and the second buffer cylinder 11 are symmetrically fixed on both sides of the oil passing trough 3. The centers of the first buffer cylinder 7 and the second buffer cylinder 11 are each provided with a shuttle hole 6 larger than the outer diameter of the cable. The ends of the first extrusion cover 8 and the second extrusion cover 10 away from the coating cylinder 9 are respectively connected to the first buffer cylinder 7 and the second buffer cylinder 11. The tops of the first buffer cylinder 7 and the second buffer cylinder 11 are both connected to the first oil filling pipe 4, and the bottoms of the first buffer cylinder 7 and the second buffer cylinder 11 are both connected to the second oil filling pipe 5. The first oil filling pipe 4 and the second oil filling pipe 5 are both connected to the refueling pump body 2.

[0043] During operation, the cable passes through the first extrusion cover 8, the coating cylinder 9 and the second extrusion cover 10 in sequence, and then the grease is injected into the first buffer cylinder 7 and the second buffer cylinder 11 through the refueling pump body 2, and it is injected from the upper and lower ends at the same time, so that the pressure of the grease entering the extrusion cover can be more uniform. When the pressure entering the extrusion cover is more uniform, it paves the way for the grease squeezed out of the subsequent extrusion cover to be squeezed out in a circular ring structure, so that the cable can be coated more evenly when entering the coating cylinder 9. That is to say, the grease in the first buffer cylinder 7 and the second buffer cylinder 11 finally enters the coating cylinder 9 through the first extrusion cover 8 and the second extrusion cover 10 and converges, and the cable completes the oiling when passing through the coating cylinder 9.

[0044] Continuing from the above, in order to make the extrusion cover extrude the ointment of the circular structure, the coating uniformity can be improved when the cable passes through, and after the ointment of the circular structure is extruded, the pressure requirement of the refueling pump body 2 does not need to be too high. Even if it is not necessary to fill the coating cylinder 9 with ointment, or the pressure in the coating cylinder 9 does not need to be too high, the ointment of the circular structure is continuously extruded by the extrusion cover on both sides of the coating cylinder 9 through the cable, which can ensure that the cable can be evenly coated with the ointment.

[0045] For details, see Figure 4 As shown, a conical extrusion chamber 12 is formed in the first extrusion cover 8 and the second extrusion cover 10, and a circular extrusion port is formed at the connection between the first extrusion cover 8 and the second extrusion cover 10 and the coating cylinder 9. The cable passes through the extrusion port, and one end of the extrusion chamber 12 is connected to the buffer cylinder, and the other end is connected to the coating cylinder 9; the place where the extrusion chamber 12 is connected to the coating cylinder 9 forms a circular extrusion port.

[0046] Further, such as Figure 4 and Figure 8 、 Figure 9 As shown, in order to achieve sealing at both ends of the coating cylinder 9 and to play a certain oil scraping role at the rear end where the cable passes through, it is necessary to provide sealing members at both ends of the coating cylinder 9 and below the extrusion port of the extrusion chamber 12 for sealing. Specifically, the first extrusion cover 8 and the second extrusion cover 10 are respectively provided with symmetrically arranged sealing members at the connection points with the coating cylinder 9. The sealing members are all conical structures, and the opposite ends of the two seals are the narrower ends of the conical structure. The narrower end of the seal extends a distance toward the front end to form a circular ring-shaped sealing portion.

[0047] Among them, the sealing members are respectively a first sealing member 16 provided in the first extrusion cover 8 and a second sealing member 17 provided in the second extrusion cover 10, and the first sealing member 16 and the second sealing member 17 are both located in the coating cylinder 9. The inclined surfaces of the conical structures around the first sealing member 16 and the second sealing member 17 are made of soft material, and the sealing parts of the cylindrical structures of the first sealing member 16 and the second sealing member 17 are made of hard material.

[0048] In addition, the inner diameter of the narrower end of the tapered structure of the first seal 16 and the second seal 17 is adapted to the outer diameter of the cable, and the inner diameter of the narrower end of the tapered structure of the second seal 17 is smaller than the inner diameter of the narrower end of the tapered structure of the first seal 16.

[0049] During operation, the cable passes through the first seal 16 adjacent to the first extrusion cover 8, passes through the coating chamber 13 in the coating barrel 9 to be coated with grease, and then passes through the second seal 17 adjacent to the second extrusion cover 10. In this process, Figure 4 It can be seen that since the end of the seal adjacent to the extrusion port is a conical inclined surface structure and is connected to the extrusion port, the annular paste extruded from the extrusion port can smoothly flow to the cable passing through the sealing portion of the annular structure of the seal. Secondly, when the oil pressure in the coating chamber 13 is high, the pressure will drive the two relative annular sealing portions of the seal to move away from each other. At this time, the inclined surface of the cylindrical structure of the seal can play a buffering role because it is made of soft material, causing the annular sealing portions to move away from each other slowly. However, when the annular sealing portions move to the two ends of the coating cylinder 9, the buffer tube 151 mentioned below is used to block the annular sealing portions. When the oil pressure continues to increase, the annular sealing portion will cling to one end of the buffer tube 151, so that automatic sealing is achieved by relying on the oil pressure in the coating chamber 13.

[0050] Secondly, for the annular sealing portion of the seal adjacent to the second extruded cover 10, its inner diameter is slightly smaller than the inner diameter of the sealing portion adjacent to the first extruded cover 8. At the same time, with the help of the hard material of the sealing portion, the cable is scraped off, so that after the cable is coated, it is scraped off by the annular sealing portion adjacent to the second extruded cover 10, so that the surface of the cable is coated with a thin and uniform layer of ointment.

[0051] Furthermore, after the first layer of sealing of the seal, subsequent protection is required to improve the sealing performance for long-term use, and at the same time assist the sealing portion adjacent to the second extrusion cover 10 side to scrape oil; Figure 4-Figure 9 As shown, both the first extrusion hood 8 and the second extrusion hood 10 are provided with scraping assemblies 14 with different degrees of tightness for the cable to pass through, wherein the scraping assembly 14 includes two symmetrically arranged scraping plates 141, the two scraping plates 141 form a conical structure, and the scraping plates 141 are provided with elastic telescopic rods 142, and the scraping plates 141 are connected to the inner wall of the extrusion hood through the elastic telescopic rods 142. It should be added that the inner diameter of the narrower end of the conical structure formed by the two scraping plates 141 is adapted to the outer diameter of the cable, and the tightness of the scraping assembly 14 in the first extrusion hood 8 to the cable is less than the tightness of the scraping assembly 14 in the second extrusion hood 10 to the cable.

[0052] During operation, the cable first passes through the shuttle hole 6 and enters the extrusion cover, and then enters between the two scraper plates 141. The scraper plates 141 can move elastically up and down by relying on the elastic telescopic rod 142, so the cable can be better tightened. The degree of tightening determines the sealing effect of the last sealing barrier. However, since the scraper plates 141 located in the second extrusion cover 10 also play the role of a second oil scraper, the scraper assembly 14 located in the second extrusion cover 10 is more tightly tightened, and the tapered structure of the scraper assembly 14 facilitates the passage of the cable. At the same time, the narrower end can be elastically squeezed by the elastic telescopic rod 142 to achieve the last seal on both ends of the coating cylinder 9.

[0053] In addition, see Figure 6-Figure 9 As shown, in order to reduce the resistance of the cable running between the scraping assembly 14 and the seal, and at the same time to replicate the seal to block the overflow of the ointment, a buffer assembly 15 is provided in the first extrusion cover 8 and the second extrusion cover 10 at the end of the first seal 16 and the second seal 17 away from the coating cylinder 9, and the scraping assembly 14 is connected to the seal through the buffer assembly 15; wherein the buffer assembly 15 includes a buffer tube 151 adapted to the inner diameter of the narrower end of the conical structure of the scraping assembly 14, and a plurality of first roller groups 152 are provided in the buffer tube 151 at equal intervals along the axial direction. and the second roller group 153. The first roller group 152 and the second roller group 153 both include a number of rollers circumferentially rotatably arranged in the buffer tube 151. The rollers in the first roller group 152 and the second roller group 153 are staggered, and the roller widths of the first roller group 152 and the second roller group 153 are adapted to the intervals between the two sides of the rollers. The circular structure formed by the part where the rollers contact the cable is adapted to the inner diameter of the narrower end of the conical structure of the scraping assembly 14. It should be noted that the outer diameter of the sealing portion is between the inner diameter and the outer diameter of the buffer tube 151.

[0054] During operation, the cable passes through the scraping assembly 14, then through the buffer assembly 15, and then through the first seal 16 to enter the coating chamber 13, and then passes through the second seal 17, the buffer assembly 15 and the scraping assembly 14 in sequence, and then passes through the shuttle hole 6 of the second buffer cylinder 11, completing the oiling and scraping process; and because the scraping assembly 14 squeezes and seals the cable and scrapes the oil, the rollers in the buffer tube 151 are added to reduce the resistance between the cable and the seal, and the cable will be easier to pass through the rollers in the buffer tube 151. At the same time, the staggered layout of the rollers of the first roller group 152 and the second roller group 153 can also play a certain sealing role. Even if grease enters the buffer tube 151 after long-term use, it can also play the role of lubricating the rollers. When a certain amount of grease is filled in the buffer tube 151, the pressure will be balanced to achieve a certain sealing effect. Finally, it should be noted that the extrusion cover can be disassembled, so its conical structure makes it easy to clean the accumulated grease after disassembly.

[0055] In summary, the present invention constructs a "buffering-extrusion-sealing-lubrication" four-in-one coating system through double buffer cylinders, symmetrical oil injection to optimize oil pressure distribution, conical extrusion cover and multi-stage seals to achieve dynamic sealing and precise oil scraping, and buffer roller group to reduce traction resistance, thereby effectively solving the problems in the existing cross-linked polyethylene insulated power cable oil treatment technology, that is, insufficient oil pump pressure will lead to uneven cable coating, and excessive pressure will easily cause oil overflow and waste, affecting coating quality and material consumption.

Claims

1. A process for preparing a cosmic ray-resistant and high-temperature-resistant cable, comprising an oil-passing device (1) and an oil-passing trough (3), wherein the oil-passing device (1) is provided with a refueling pump body (2), and oil is injected into the oil-passing trough (3) through the refueling pump body (2), and the cable passes through the oil-passing trough (3) and passes through the oil, wherein: A first extrusion cover (8) and a second extrusion cover (10) are symmetrically arranged in the oil-passing trough cylinder (3); the first extrusion cover (8) and the second extrusion cover (10) are of a conical structure, and the first extrusion cover (8) and the second extrusion cover (10) are connected via a coating cylinder (9); The first extrusion cover (8) and the second extrusion cover (10) form an extrusion chamber (12) with a conical structure, and the connection between the first extrusion cover (8) and the second extrusion cover (10) and the coating cylinder (9) forms a circular extrusion port, through which the cable passes; The connection points between the first extrusion cover (8) and the second extrusion cover (10) and the coating cylinder (9) are respectively provided with symmetrically arranged sealing members, each of which is a conical structure, and the opposite ends of the two sealing members are the narrower ends of the conical structure, and the narrower ends of the sealing members extend a distance toward the front end to form a circular ring-shaped sealing portion; The first extrusion cover (8) and the second extrusion cover (10) are both provided with scraping components (14) for passing cables and having different degrees of fastening.

2. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 1, characterized in that: A first buffer cylinder (7) and a second buffer cylinder (11) are symmetrically fixed on both sides of the oil trough cylinder (3); one end of the first extrusion cover (8) and the second extrusion cover (10) away from the coating cylinder (9) is connected to the first buffer cylinder (7) and the second buffer cylinder (11), respectively; the tops of the first buffer cylinder (7) and the second buffer cylinder (11) are connected to the first oil injection pipe (4); the bottoms of the first buffer cylinder (7) and the second buffer cylinder (11) are connected to the second oil injection pipe (5); and the first oil injection pipe (4) and the second oil injection pipe (5) are both connected to the refueling pump body (2).

3. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 2, wherein: The first buffer cylinder (7) and the second buffer cylinder (11) are both provided with a shuttle hole (6) in the center thereof, which is larger than the outer diameter of the cable.

4. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 1, wherein: The cable passes through the first extrusion cover (8), the coating barrel (9) and the second extrusion cover (10) in sequence.

5. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 4, characterized in that: The sealing members are respectively a first sealing member (16) arranged in the first extrusion cover (8) and a second sealing member (17) arranged in the second extrusion cover (10), and the first sealing member (16) and the second sealing member (17) are both located in the coating cylinder (9), the inclined surfaces of the conical structures around the first sealing member (16) and the second sealing member (17) are made of soft material, and the sealing parts of the cylindrical structures of the first sealing member (16) and the second sealing member (17) are made of hard material.

6. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 5, characterized in that: The inner diameter of the narrower end of the conical structure of the first seal (16) and the second seal (17) is adapted to the outer diameter of the cable, and the inner diameter of the narrower end of the conical structure of the second seal (17) is smaller than the inner diameter of the narrower end of the conical structure of the first seal (16).

7. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 4, characterized in that: The scraping assembly (14) comprises two symmetrically arranged scraping plates (141), the two scraping plates (141) forming a conical structure, and elastic telescopic rods (142) are provided on the scraping plates (141), and the scraping plates (141) are connected to the inner wall of the extrusion cover via the elastic telescopic rods (142).

8. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 7, wherein: The inner diameter of the narrower end of the conical structure formed by the two scraping plates (141) is adapted to the outer diameter of the cable, and the degree of tightening of the cable by the scraping assembly (14) in the first extrusion cover (8) is smaller than the degree of tightening of the cable by the scraping assembly (14) in the second extrusion cover (10).

9. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 7, wherein: A buffer assembly (15) is provided in the first extrusion cover (8) and the second extrusion cover (10) at one end of the first seal (16) and the second seal (17) away from the coating barrel (9), and the scraping assembly (14) is connected to the seal via the buffer assembly (15).

10. The process for preparing a cosmic ray-resistant and high-temperature-resistant cable according to claim 9, characterized in that: The buffer assembly (15) includes a buffer tube (151) adapted to the inner diameter of the narrower end of the conical structure of the scraping assembly (14), and a plurality of first roller groups (152) and second roller groups (153) are arranged in the buffer tube (151) at equal intervals along the axial direction. The first roller group (152) and the second roller group (153) each include a plurality of rollers arranged in the buffer tube (151) in a circumferentially rotatable manner. The rollers in the first roller group (152) and the second roller group (153) are arranged in a staggered manner, and the roller widths of the first roller group (152) and the second roller group (153) are adapted to the intervals between the two sides of the rollers. The circular structure formed by the portion where the rollers contact the cable is adapted to the inner diameter of the narrower end of the conical structure of the scraping assembly (14); The outer diameter of the sealing portion is between the inner diameter and the outer diameter of the buffer tube (151).

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