Cosmic-ray-resistant high-temperature-resistant cable preparation process

Abstract

The invention relates to the technical field of cable preparation, in particular to a cosmic-ray-resistant high-temperature-resistant cable preparation process, which comprises a first extrusion cover and a second extrusion cover, extrusion cavities with conical structures are formed in the first extrusion cover and the second extrusion cover, circular-ring-shaped extrusion openings are formed in the communication positions of the first extrusion cover and the second extrusion cover with a coating cylinder, and a cable penetrates through the extrusion openings and is connected with the coating cylinder. One end of the extrusion chamber is communicated with the buffer cylinder, the other end of the extrusion chamber is communicated with the coating cylinder, a circular-ring-shaped extrusion opening is formed in the position where the extrusion chamber is communicated with the coating cylinder, sealing pieces which are symmetrically arranged are arranged at the positions where the first extrusion cover and the second extrusion cover are communicated with the coating cylinder respectively, and the sealing pieces are each of a conical structure; the opposite ends of the two sealing pieces are the narrow ends of the conical structures, and the heating front ends of the narrow ends of the sealing pieces extend by a certain distance to form annular sealing parts.

Description

Technical Field

[0001] The present invention relates to the technical field of cable preparation, and more specifically, to a preparation process for a cable resistant to cosmic rays and high temperatures. Background Art

[0002] Cross-linked polyethylene (XLPE) insulated power cables are important devices for transmitting electrical energy. Their main function is to provide a reliable electrical connection between different electrical devices and ensure that the power loss during transmission is minimized. With the increasing demand for electrical energy in society and the expansion of the power grid system, the design, manufacturing, and application technologies of insulated power cables are also constantly evolving.

[0003] During the cable production process, "oiling" usually refers to the process of passing the cable through an oil tank so that its surface is covered with a layer of oil. This process is mainly used in the manufacture of certain types of cables, especially those that require an additional protective layer to improve performance or extend service life.

[0004] In the production process of cross-linked polyethylene insulated power cables, the oiling treatment is an essential step. The traditional method relies on an oil pump to inject oil paste into the oil tank, and the cable passes through the tank to achieve surface coating. However, this operation method has obvious deficiencies: when the pressure of the oil pump is insufficient, the oil paste coating on the cable surface will be uneven, affecting the final insulation effect; conversely, if the pressure is set too high, it is easy to cause the oil paste to overflow at both ends of the oil tank, not only wasting materials but also increasing the workload of subsequent cleaning and maintenance.

[0005] Based on this, the present invention discloses a preparation process for a cable resistant to cosmic rays and high temperatures. Summary of the Invention

[0006] To solve the problems in the oiling treatment technology of cross-linked polyethylene insulated power cables in the background art, where insufficient pressure of the oil pump leads to uneven coating of the cable, while too high pressure is prone to cause oil paste overflow and waste, affecting the coating quality and material consumption, the present invention provides a preparation process for a cable resistant to cosmic rays and high temperatures, which includes an oiling device and an oil tank cylinder. An oil pump body is provided on the oiling device, and the oil tank cylinder is injected with oil paste through the oil pump body. The cable passes through the oil tank cylinder for oiling. First and second extrusion covers are symmetrically arranged in the oil tank cylinder. The first and second extrusion covers are in a conical structure, and the first and second extrusion covers are connected and communicated 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 and fixedly arranged on both sides inside the oil passing cylinder. Through holes larger than the outer diameter of the cable are formed in the centers of the first buffer cylinder and the second buffer cylinder. One ends of the first extrusion cover and the second extrusion cover far away from the coating cylinder are respectively communicated with the first buffer cylinder and the second buffer cylinder. The tops of the first buffer cylinder and the second buffer cylinder are both communicated with a first oil injection pipe, and the bottoms of the first buffer cylinder and the second buffer cylinder are both communicated with a second oil injection pipe. Both the first oil injection pipe and the second oil injection pipe are communicated with the oil filling pump body.

[0008] In the present technical solution, in order to improve the coating uniformity in the coating of the ointment first, an annular ointment is designed to be extruded by the extrusion cover, so that the coating uniformity can be improved when the cable passes through.

[0009] In the present technical solution, a tapered extrusion chamber is formed inside the first extrusion cover and the second extrusion cover. An annular extrusion port is formed at the connection between the first extrusion cover and the second extrusion cover and the coating cylinder. The cable passes through the extrusion port. One end of the extrusion chamber is communicated with the buffer cylinder, and the other end is communicated with the coating cylinder; the place where the extrusion chamber is communicated with the coating cylinder forms an annular extrusion port.

[0010] By connecting the first oil injection pipe and the second oil injection pipe respectively at the upper part and the bottom, two-way synchronous oil injection is realized to ensure the dynamic balance of the oil pressure; the first extrusion cover and the second extrusion cover: are of a symmetric tapered structure, with an extrusion chamber formed inside, and the end is communicated with the coating cylinder to form an annular extrusion port, guiding the ointment to wrap the cable in an annular laminar flow.

[0011] On this basis, after the coating is uniform, in order to seal both ends inside the coating cylinder and play a certain role in scraping oil at the rear end where the cable passes through.

[0012] As a further improvement of the present technical solution, sealing members are respectively arranged at the connections between the first extrusion cover and the second extrusion cover and the coating cylinder, and are symmetrically arranged. The sealing members are all of a tapered structure, and the opposite ends of the two sealing members are the narrower ends of the tapered structure. A circular sealing part is formed by extending a certain distance at the front end of the narrower end of the sealing member.

[0013] As a further improvement of the present technical solution, the sealing members are respectively a first sealing member arranged inside the first extrusion cover and a second sealing member arranged inside the second extrusion cover, and both the first sealing member and the second sealing member are located inside the coating cylinder. The inclined surfaces of the tapered structures around the first sealing member and the second sealing member are made of soft materials, and the sealing parts of the cylindrical structures of the first sealing member and the second sealing member are made of hard materials.

[0014] As a further improvement of the technical solution, the inner diameter of the narrower end of the conical structures 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 rises, it abuts against the buffer pipe to achieve dynamic sealing; the inner diameter of the second seal is slightly smaller than the outer diameter of the cable, and the hard sealing part scrapes off the excess ointment; secondly, the fastening degree of the scraping component in the second extrusion cover is higher, forming a secondary oil scraping barrier.

[0016] After the first layer of sealing by the seal, subsequent guarantees are still needed to improve the sealing performance during long-term use, and at the same time assist in scraping oil from the sealing part near the second extrusion cover.

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

[0018] As a further improvement of the technical solution, the scraping component includes two scraping plates arranged symmetrically. The two scraping plates 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 fastening degree of the scraping component in the first extrusion cover to the cable is less than the fastening degree of the scraping component in the second extrusion cover to the cable.

[0019] In order to reduce the resistance of the cable when shuttling between the scraping component and the seal, and at the same time play a role in replicating the seal to block the overflow of the ointment.

[0020] As a further improvement of the technical solution, buffer components are provided at the ends of the first extrusion cover and the second extrusion cover, away from the coating cylinder, of the first seal and the second seal, and the scraping component is connected to the seal through the buffer component.

[0021] As a further improvement of the technical solution, the buffer component includes a buffer pipe adapted to the inner diameter of the narrower end of the conical structure of the scraping component. A number of groups of first roller groups and second roller groups are arranged at equal intervals along the axial direction in the buffer pipe. Each of the first roller group and the second roller group contains a number of rollers rotatably arranged circumferentially in the buffer pipe. The rollers in the first roller group and the second roller group are arranged in an alternating layout, and the width of the rollers in the first roller group and the second roller group is adapted to the interval between both sides of the rollers. The circular structure formed by the part of the rollers in contact with the cable is adapted to the inner diameter of the narrower end of the conical structure of the scraping component.

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

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. In the preparation process of the cosmic ray-resistant and high-temperature-resistant cable, the uniform distribution of pressure and the improvement of coating quality are realized. By setting the first buffer cylinder and the second buffer cylinder, and adopting the method of injecting the ointment from both the upper and lower ends (via the first oil injection pipe and the second oil injection pipe), the pressure of the ointment entering the first extrusion cover and the second extrusion cover is more uniform, ensuring that when the cable passes through the coating cylinder, it can be coated with the ointment more evenly, avoiding the problem of uneven coating caused by uneven pressure. In addition, since there is no need for too high pressure to ensure the coating effect, the risk of ointment overflow is reduced, and the material utilization rate is improved.

[0025] 2. In the preparation process of the cosmic ray-resistant and high-temperature-resistant cable, the extrusion of the ointment in a circular ring structure is realized. The design of the conical extrusion chamber in the first extrusion cover and the second extrusion cover enables the ointment to be extruded in a circular ring structure and coated around the cable, which not only enhances the consistency and integrity of the coating, but also reduces the pressure requirement on the oil pump body, further optimizing the resource utilization efficiency.

[0026] 3. In the preparation process of the cosmic ray-resistant and high-temperature-resistant cable, the integration of the sealing and oil scraping functions is realized. The design of the first seal and the second seal, especially its circular ring-shaped sealing part and the inclined surface of the soft material, as well as the application of the scraping component, realize the effective sealing of the cable and the secondary oil scraping treatment, which not only effectively prevents the ointment from overflowing, but also ensures that a thin and uniform ointment layer is formed on the cable surface, improving the insulation performance of the final product. Description of the Drawings

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

[0028] Figure 2 It is a schematic diagram of the structure of the oil passing trough cylinder of the present invention;

[0029] Figure 3 It is a cross-sectional view of the structure of the oil passing trough cylinder of the present invention;

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

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

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

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

[0034] Figure 8 Structural sectional view of the first seal of the present invention;

[0035] Figure 9 is Figure 8 Enlarged view of the structure at position A in

[0036] The meanings of each label in the figure are as follows:

[0037] 1. Oil passing device; 2. Fuel injection pump body; 3. Oil passing trough cylinder; 4. First oil injection pipe; 5. Second oil injection 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. Scraping plate; 142. Elastic telescopic rod;

[0039] 151. Buffer pipe; 152. First roller group; 153. Second roller group. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the existing oil passing treatment technology for cross-linked polyethylene insulated power cables, insufficient pressure of the fuel injection pump will cause uneven coating of the cable, while too high pressure is likely to cause waste of grease overflow, affecting the coating quality and material consumption.

[0042] Therefore, the present invention provides a preparation process for a cable resistant to cosmic rays and high temperatures. See Figures 1 - 4As shown in the figure, it includes an oil passing device 1 and an oil passing trough cylinder 3. An oil filling pump body 2 is arranged on the oil passing device 1. The oil paste is injected into the oil passing trough cylinder 3 through the oil filling pump body 2. The cable passes through the oil passing trough cylinder 3 for oil passing. 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 in a conical structure. The first extrusion cover 8 and the second extrusion cover 10 are connected through a coating cylinder 9. Secondly, a first buffer cylinder 7 and a second buffer cylinder 11 are symmetrically and fixedly arranged on both sides in the oil passing trough cylinder 3. A shuttle hole 6 larger than the outer diameter of the cable is opened in the centers of the first buffer cylinder 7 and the second buffer cylinder 11. One ends of the first extrusion cover 8 and the second extrusion cover 10 far away from the coating cylinder 9 are respectively connected to the first buffer cylinder 7 and the second buffer cylinder 11. A first oil injection pipe 4 is connected to the top of both the first buffer cylinder 7 and the second buffer cylinder 11. A second oil injection pipe 5 is connected to the bottom of both the first buffer cylinder 7 and the second buffer cylinder 11. The first oil injection pipe 4 and the second oil injection pipe 5 are both connected to the oil filling 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. Then, the oil paste is injected into the first buffer cylinder 7 and the second buffer cylinder 11 through the oil filling pump body 2, and it is injected simultaneously from the upper and lower ends. This can make the pressure of the oil paste entering the extrusion cover more uniform. When the pressure entering the extrusion cover is more uniform, it lays the foundation for the oil paste extruded by the extrusion cover to be extruded in a circular ring structure later, so that when the cable enters the coating cylinder 9, it can be coated more evenly. That is to say, the oil paste 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. The cable completes oil passing when passing through the coating cylinder 9.

[0044] As mentioned above, in order to make the extrusion cover extrude the oil paste in a circular ring structure, improve the coating uniformity when the cable passes through, and at the same time, after extruding the oil paste in a circular ring structure, the requirement for the pressure of the oil filling pump body 2 is not too high. Even if it is not necessary to fill the coating cylinder 9 with oil paste, or the pressure in the coating cylinder 9 is not too high, the circular ring structure of the oil paste continuously extruded by the extrusion covers on both sides of the cable passing through the coating cylinder 9 can ensure that the cable can be evenly coated with the oil paste;

[0045] Specifically, as shown in Figure 4 the figure, an extrusion chamber 12 in a conical structure is formed in the first extrusion cover 8 and the second extrusion cover 10. A circular ring-shaped extrusion port is formed at the connection of the first extrusion cover 8 and the second extrusion cover 10 with the coating cylinder 9. The cable passes through the extrusion port. 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 ring-shaped extrusion port.

[0046] Furthermore, as shown in Figure 4 and Figure 8 、Figure 9 As shown, in order to seal both ends inside 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 set seals below the extrusion outlets of the extrusion chambers 12 at both ends of the coating cylinder 9 for sealing. Specifically, symmetrically arranged seals are respectively provided at the connection parts of the first extrusion cover 8 and the second extrusion cover 10 with the coating cylinder 9. The seals are both conical structures, and the opposite ends of the two seals are the narrower ends of the conical structures. A circular sealing part is formed by extending a certain distance from the narrower end of the seal to the front end of the heating part;

[0047] Among them, the seals are respectively the first seal 16 arranged inside the first extrusion cover 8 and the second seal 17 arranged inside the second extrusion cover 10, and both the first seal 16 and the second seal 17 are located inside the coating cylinder 9. The inclined surfaces of the conical structures around the first seal 16 and the second seal 17 are made of soft materials, and the sealing parts of the cylindrical structures of the first seal 16 and the second seal 17 are made of hard materials;

[0048] In addition, the inner diameters of the narrower ends of the conical structures of the first seal 16 and the second seal 17 are 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.

[0049] During operation, the cable passes through the first seal 16 on the side close to the first extrusion cover 8, is coated with grease in the coating chamber 13 inside the coating cylinder 9, and then passes through the second seal 17 on the side close to the second extrusion cover 10. During this process, through Figure 4 It can be seen that since the end of the seal close to the extrusion outlet is a conical inclined surface structure and is in a connected structure with the extrusion outlet, the circular grease extruded from the extrusion outlet can smoothly flow onto the cable passing through the circular sealing part of the seal. Secondly, when the oil pressure in the coating chamber 13 is relatively high, the pressure will drive the circular sealing parts of the two seals to move away from each other. At this time, the inclined surface of the cylindrical structure of the seal, being made of soft material, can play a buffering role, causing the circular sealing part to move away from each other slowly. However, when the circular sealing part moves to the positions at both ends of the coating cylinder 9, the buffer tube 151 mentioned below is relied on to block the circular sealing part. After the oil pressure continues to increase, the circular sealing part will closely adhere to one end of the buffer tube 151, enabling automatic sealing by relying on the oil pressure in the coating chamber 13;

[0050] Secondly, for the circular sealing part of the seal on the side close to the second extrusion cover 10, its inner diameter is slightly smaller than the inner diameter of the sealing part close to the first extrusion cover 8. At the same time, with the help of the hard material of the sealing part, oil scraping of the cable is achieved, so that after the cable is coated, it is scraped by the circular sealing part on the side close to the second extrusion cover 10, making a thin and uniform layer of grease coated on the surface of the cable.

[0051] Furthermore, after the first layer of sealing by the seal, subsequent safeguards are required to improve the sealing performance during long-term use and assist in scraping oil from the sealing part adjacent to one side of the second extrusion cover 10. As Figures 4 - 9 shown, scraping assemblies 14 with different tightening degrees for the cable to pass through are provided in both the first extrusion cover 8 and the second extrusion cover 10. Among them, the scraping assembly 14 includes two scraping plates 141 arranged symmetrically. The two scraping plates 141 form a conical structure, and elastic telescopic rods 142 are provided on the scraping plates 141. The scraping plates 141 are connected to the inner wall of the extrusion cover 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 tightening degree of the scraping assembly 14 in the first extrusion cover 8 on the cable is less than that of the scraping assembly 14 in the second extrusion cover 10 on the cable.

[0052] During operation, the cable first enters the extrusion cover through the shuttle hole 6 and then enters between the two scraping plates 141. The scraping plates 141 can elastically move up and down relying on the elastic telescopic rods 142, so the cable can be better tightened. The tightening degree determines the sealing effect of the last sealing barrier. However, since the scraping plate 141 in the second extrusion cover 10 also serves as a second oil scraping function, the tightening degree of the scraping assembly 14 in the second extrusion cover 10 is higher. The conical structure of the scraping assembly 14 facilitates the cable to pass through, and the narrower end can achieve the last layer of sealing for both ends of the coating cylinder 9 through elastic extrusion by the elastic telescopic rods 142.

[0053] In addition, as shown in Figures 6 - 9 to reduce the resistance of the cable when shuttling between the scraping assembly 14 and the seal, and at the same time play a role in replicating the seal to block the overflow of the ointment, buffer assemblies 15 are provided at the ends of the first seal 16 and the second seal 17 away from the coating cylinder 9 in the first extrusion cover 8 and the second extrusion cover 10. The scraping assembly 14 is connected to the seal through the buffer assembly 15. Among them, 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. A number of groups of first roller groups 152 and second roller groups 153 are arranged at equal intervals along the axial direction in the buffer tube 151. Both the first roller group 152 and the second roller group 153 contain a number of rollers rotatably arranged circumferentially in the buffer tube 151. The rollers in the first roller group 152 and the second roller group 153 are arranged in an interleaved pattern, and the width of the rollers in the first roller group 152 and the second roller group 153 is adapted to the interval between both sides of the rollers. The circular structure formed by the part of the rollers in contact with 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 part 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 enters the coating chamber 13 through the first seal 16. After that, it passes through the second seal 17, the buffer assembly 15, and the scraping assembly 14 in sequence and then passes out through the shuttle hole 6 of the second buffer cylinder 11, completing the processes of oil passing and oil scraping. Due to the squeezing and sealing and oil scraping effects of the scraping assembly 14 on the cable, rollers are added in the buffer tube 151 to reduce the resistance between the cable and the seals. The cable will be more relaxed when passing through the rollers in the buffer tube 151. At the same time, the rollers of the first roller group 152 and the second roller group 153 are arranged in a staggered manner, which can also play a certain sealing role. Even if the ointment enters the buffer tube 151 after long-term use, it can also lubricate the rollers. When the buffer tube 151 is filled with a certain amount of ointment, it will achieve pressure balance and a certain sealing effect. Finally, it should be noted that the extrusion cover can be disassembled. Therefore, due to its conical structure, it is convenient to clean the accumulated ointment after disassembly.

[0055] In summary, the present invention constructs a "buffer-extrusion-sealing-lubrication" four-in-one coating system through a double buffer cylinder, symmetric oil injection to optimize the oil pressure distribution, a conical extrusion cover and multi-stage seals to achieve dynamic sealing and precise oil scraping, and a buffer roller group to reduce the traction resistance, thereby effectively solving the problems in the existing oil passing treatment technology for cross-linked polyethylene insulated power cables. That is, insufficient pressure of the oil pump will cause uneven cable coating, while too high pressure is likely to cause waste of ointment overflow, affecting the coating quality and material consumption.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation process for a cosmic ray and high temperature resistant cable, which comprises an oil passing device (1) and an oil passing trough cylinder (3). A fuel injection pump body (2) is arranged on the oil passing device (1), and an ointment is injected into the oil passing trough cylinder (3) through the fuel injection pump body (2). The cable passes through the oil passing trough cylinder (3) for oil passing. It is characterized in that: A first extrusion cover (8) and a second extrusion cover (10) are symmetrically arranged inside the oil passing tank cylinder (3). The first extrusion cover (8) and the second extrusion cover (10) are in a conical structure, and the first extrusion cover (8) and the second extrusion cover (10) are connected through a coating cylinder (9). Wherein, an extrusion chamber (12) with a conical structure is formed inside the first extrusion cover (8) and the second extrusion cover (10). An annular extrusion port is formed at the connection of the first extrusion cover (8) and the second extrusion cover (10) with the coating cylinder (9), and the cable passes through the extrusion port. Symmetrically arranged seals are respectively provided at the connection of the first extrusion cover (8) and the second extrusion cover (10) with the coating cylinder (9). The seals are all in a conical structure, and the opposite ends of the two seals are the narrower ends of the conical structure. The narrower end of the seal extends a certain distance at the front end of the heat to form an annular sealing part. Scraping assemblies (14) with different tightening degrees for the cable to pass through are respectively arranged inside the first extrusion cover (8) and the second extrusion cover (10).

2. The preparation process of the 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 and fixedly arranged on both sides inside the oil passing tank cylinder (3). The ends of the first extrusion cover (8) and the second extrusion cover (10) far 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 a first oil injection pipe (4), and the bottoms of the first buffer cylinder (7) and the second buffer cylinder (11) are both connected to a second oil injection pipe (5). The first oil injection pipe (4) and the second oil injection pipe (5) are both connected to the fuel pump body (2).

3. The preparation process of the cosmic ray-resistant and high-temperature-resistant cable according to claim 2, characterized in that: Shuttle holes (6) larger than the outer diameter of the cable are respectively opened at the centers of the first buffer cylinder (7) and the second buffer cylinder (11).

4. The preparation process of the cosmic ray-resistant and high-temperature-resistant cable according to claim 1, characterized in that: The cable passing direction is successively the first extrusion cover (8), the coating cylinder (9), and the second extrusion cover (10).

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

6. The preparation process of the 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 preparation process of the cosmic ray and high temperature resistant cable according to claim 4, characterized in that: The scraping assembly (14) includes two scraping plates (141) arranged symmetrically. The two scraping plates (141) form a conical structure, and elastic telescopic rods (142) are arranged on the scraping plates (141). The scraping plates (141) are connected to the inner wall of the extrusion cover through the elastic telescopic rods (142).

8. The preparation process of the cosmic ray-resistant and high-temperature-resistant cable according to claim 7, characterized in 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. The fastening degree of the scraping assembly (14) in the first extrusion cover (8) to the cable is less than that of the scraping assembly (14) in the second extrusion cover (10) to the cable.

9. The preparation process of the cosmic ray-resistant and high-temperature-resistant cable according to claim 7, characterized in that: At the ends of the first extrusion cover (8) and the second extrusion cover (10) away from the coating cylinder (9) and located inside the first seal (16) and the second seal (17), a buffer assembly (15) is provided. The scraping assembly (14) is connected to the seal through the buffer assembly (15).

10. The preparation process of the 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). A number of groups of first roller sets (152) and second roller sets (153) are arranged axially at equal intervals in the buffer tube (151). Each of the first roller sets (152) and the second roller sets (153) contains a number of rollers rotatably arranged circumferentially in the buffer tube (151). The rollers in the first roller sets (152) and the second roller sets (153) are arranged in a staggered layout, and the width of the rollers in the first roller sets (152) and the second roller sets (153) is adapted to the interval between both sides of the rollers. The circular structure formed by the part of the rollers in contact with 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 part is between the inner diameter and the outer diameter of the buffer tube (151).

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