Radio frequency coaxial cable

Abstract

The radio frequency coaxial cable comprises a sheath and a shielding layer wrapped on the inner surface of the sheath, the shielding layer and a cable core in the center are coaxially distributed, an insulating layer used for wrapping the cable core is contained in the cable core and the shielding layer, and through grooves distributed in the axial direction are further formed in the insulating layer. Wherein the through groove is used for forming semi-air insulation in the cable, and the through groove is also used for circulating air flow for operation cooling of the cable. According to the radio frequency coaxial cable, the related structure of the insulating layer is redesigned, on the basis of guaranteeing the supporting performance, the overall weight of the cable is effectively reduced, insulation is improved, a better cooling effect is achieved at the same time, and compared with the prior art, the radio frequency coaxial cable is more suitable for a high-load operation environment and an operation environment with higher external temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency cables, in particular to a radio frequency coaxial cable. Background Art

[0002] RF coaxial cable refers to a cable with a copper-clad aluminum core, a shielding layer, and an overall coaxial distribution of the cable. It uses electrical signals to transmit signals. Unlike optical signals of optical fibers, RF coaxial cables are more susceptible to electromagnetic interference. For example, in the prior art, there is a RF coaxial cable with announcement number CN222785447U, which includes: a conductor, an insulation layer, a first conductor layer, and a first thermal insulation layer. The surface of the conductor is sequentially coated with an insulation layer, a first conductor layer, and a first thermal insulation layer, and the first thermal insulation layer is a first aerogel film thermal insulation layer. The above-mentioned RF coaxial cable can significantly extend the normal working time of the cable under extremely high temperatures by setting the first thermal insulation layer as an aerogel film layer. At the same time, it reduces the weight of the RF coaxial cable and improves the applicability of the RF coaxial cable.

[0003] Another example is a radio frequency coaxial cable disclosed in the prior art with the publication number CN118472586A. The radio frequency coaxial cable includes an inner conductor, an insulating portion, and an outer conductor arranged in sequence from the inside to the outside. The insulating portion includes an inner insulating layer, a support portion, and an outer insulating layer arranged in sequence from the inside to the outside. The support portion includes a plurality of support arms. The plurality of support portions are spaced apart along the circumference of the radio frequency coaxial cable. The two ends of the support arms are respectively connected to the inner insulating layer and the outer insulating layer. A cavity is formed between the inner insulating layer, the outer insulating layer, and the support arms. The support arms have a width dimension along the circumference of the radio frequency coaxial cable. The width dimension of the support arms gradually increases from the inner insulating layer to the outer insulating layer. This solution can solve the problem in the prior art that when the porosity of the insulating layer is increased to reduce signal loss, the support effect of the radio frequency coaxial cable is poor, which affects the durability and reliability of the radio frequency coaxial cable.

[0004] The above-mentioned prior arts all disclose solutions of using aerogel or air layer as a partial replacement structure for the insulating layer, thereby reducing the weight of the cable and improving the insulation effect. They have great practical implications for the actual application of RF cables. However, since the overall diameter of the RF cable is not large, the design of aerogel or multiple groups of hollow structures, although it can achieve the above-mentioned effects to a certain extent, will have the problems of high processing difficulty and poor support. Summary of the Invention

[0005] The purpose of the present invention is to provide a radio frequency coaxial cable to solve the problem raised in the above background technology that due to the small overall diameter of the radio frequency cable, the design of aerogel or multiple groups of hollow structures can achieve the above effect to a certain extent, but there will be problems such as high processing difficulty and poor support.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a radio frequency coaxial cable, comprising a sheath and a shielding layer wrapped around its inner surface, wherein the shielding layer and the core at the center are coaxially distributed, and the core and the shielding layer contain an insulating layer for wrapping the core, and the insulating layer is also provided with through grooves distributed along the axial direction, wherein the through grooves are used to form semi-air insulation in the cable, and the through grooves are also used to circulate air for cooling the cable during operation.

[0007] Furthermore, the through groove is connected to a gas transmission mechanism installed at the end of the cable, wherein the gas transmission mechanism is made of non-metallic material or copper material.

[0008] Furthermore, the gas transmission mechanism includes an inner hollow structural ring body surrounding the outside of the insulating layer, wherein the input end of the ring body is connected to the air inlet pipe, and the output end is connected to the through groove through multiple air outlet pipes, wherein the input end is used to be connected to the air supply equipment.

[0009] Furthermore, a reinforcement strip is spliced ​​in the through groove, and the reinforcement strip is also made of a deformable material.

[0010] Furthermore, the inner end of the reinforcement strip is separated from the inner end of the through groove by a distance, and the distance is used for airflow. At the same time, the outer end of the reinforcement strip protrudes from the outer edge of the insulation layer, so that a cavity is formed between two adjacent reinforcement strips, the outer edge of the insulation layer and the shielding layer.

[0011] Furthermore, the interior of the reinforcement strip is provided with a hollow core, the inner end of the hollow core is designed to be open and connected to the through groove, and the hollow core is used to further reduce weight and improve the cooling effect.

[0012] Furthermore, the cable is provided with a ring portion distributed around the outer surface of the shielding layer, wherein the ring portion is used to strengthen the connection stability between the shielding layer and the insulation layer when there are hollows and through grooves in the cable.

[0013] Furthermore, the ring portion is a ring structure with an insulated inner surface and an outer surface inlaid with a two-way memory alloy.

[0014] Furthermore, a reinforcement groove is provided on the outer surface of the reinforcement strip to increase the friction between the shielding layer and the reinforcement strip.

[0015] Furthermore, the top area of ​​the side surface of the reinforcement strip is provided with an air hole penetrating through the side wall thereof, wherein the air hole is used to connect the hollow and the cavity.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the RF coaxial cable redesigns the relevant structure of the insulation layer, and on the basis of ensuring support, effectively reduces the overall weight of the cable and improves insulation and achieves a better cooling effect at the same time. Compared with the prior art, it is more suitable for high-load operating environments and operating environments with high external temperatures, as shown in the following content.

[0017] 1. The structural design of the through-groove and the ring body can, on the one hand, utilize the semi-air insulation and weight reduction effects created by the through-groove to expand the application range of the cable. On the other hand, the ring body can actively introduce fluid, giving the through-groove a fluid flow effect, thereby further improving the active cooling effect.

[0018] As a further design solution, reinforcing strips are added to the through slots and the simple shape of the reinforcing strips is used to stably fit the through slots. This can not only achieve the fluid flow function in the through slots and retain the semi-air insulation and weight reduction effects, but also effectively ensure the overall support of the cable and improve the structural strength.

[0019] 2. The hollow structure of the reinforcement strip, combined with the protruding design at its top, forms a cavity. On the one hand, the hollow structure design can balance the fluid flow and cable support effect. On the other hand, the formation of the cavity can prevent the external environment temperature from affecting the operating temperature of the cable core due to excessive temperature increases. The structural design of the air holes allows the fluid to flow through the hollow and cavity, respectively, effectively cooling the cable from the center and outer areas.

[0020] Furthermore, the use of the ring structure can, on the one hand, improve the connection stability of the shielding layer, and on the other hand, utilize its active deformation characteristics to guide the shielding layer to actively deform when the ambient temperature is abnormal, and utilize the accommodation space provided by the cavity to mitigate the adverse effects of external abnormal factors on the cable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the ring body distribution structure of the present invention;

[0023] Figure 3 Schematic diagram of the internal structure of the ring body of the present invention;

[0024] Figure 4 This is a schematic diagram of the reinforcement strip distribution structure of the present invention;

[0025] Figure 5 Schematic diagram of the reinforcement strip distribution structure of the second embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the ring distribution structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the ring portion after deformation of the present invention;

[0028] Figure 8 This is a schematic diagram of the reinforcement groove distribution structure of the present invention;

[0029] Figure 9 Schematic diagram of the pore distribution structure of the present invention.

[0030] In the figure: 1. Sheath; 2. Wire core; 3. Insulation layer; 4. Shielding layer; 5. Through groove; 6. Ring body; 7. Air outlet pipe; 8. Reinforcement strip; 9. Cavity; 10. Hollow; 11. Ring part; 12. Reinforcement groove; 13. Air hole. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figures 1-9 , the present invention provides the following technical solutions:

[0033] Example 1: The technical solution disclosed in this embodiment is to solve the problems existing in the prior art, such as Figure 1-Figure 3 As shown, it includes a sheath 1 and a shielding layer 4 wrapped around its inner surface, and the shielding layer 4 is coaxially distributed with the core 2 at the center, and the core 2 and the shielding layer 4 contain an insulating layer 3 for wrapping the core 2, and the insulating layer 3 is also provided with axially distributed through grooves 5, wherein the through grooves 5 are used to form semi-air insulation in the cable, and the through grooves 5 are also used to circulate air for cooling the cable during operation, and the through grooves 5 are connected to the gas transmission mechanism installed at the end of the cable, wherein the gas transmission mechanism is made of non-metallic material or copper material, and the gas transmission mechanism includes an inner hollow structure ring body 6 surrounding the outside of the insulating layer 3, wherein the input end of the ring body 6 is connected to the air inlet pipe, and the output end is connected to the through groove 5 through multiple air outlet pipes 7. The input end is used to connect to the air supply equipment. The coaxial design and main structure of the cable are similar to those of the prior art. The biggest difference is that the fully solid insulation layer 3 in the prior art is designed to be an insulation layer 3 with through grooves 5 distributed at equal angles. The advantage of this design is that on the one hand, it can form a semi-air insulation environment and achieve better weight reduction effect. On the other hand, it can cooperate with the gas transmission mechanism to actively input airflow or insulating liquid to achieve active cooling effect, and thus is more suitable for use in special high temperature environment or high load environment. The gas transmission mechanism realizes the air intake function through the input end on the ring body 6, and introduces the fluid into the through groove 5 through the outlet pipe 7, thereby realizing active heat dissipation.

[0034] The solution disclosed in this embodiment is to further improve the above embodiment, so as to avoid the damage to the overall structural strength of the cable due to the excessive volume of the through slot 5. Figure 4 As shown, a reinforcement strip 8 is also fitted and spliced ​​in the through slot 5, wherein the reinforcement strip 8 is also made of deformable material, and the inner end of the reinforcement strip 8 is separated from the inner end of the through slot 5 by a distance, and the distance is used for airflow. At the same time, the outer end of the reinforcement strip 8 protrudes from the outer edge of the insulating layer 3, so a cavity 9 is formed between two adjacent reinforcement strips 8, the outer edge of the insulating layer 3 and the shielding layer 4. In this solution, after the through slot 5 is extruded or cut into shape, an additional reinforcement strip 8 whose outer surface matches the inner wall of the through slot 5 can be added. When the reinforcement strip 8 is solid, its inner end still leaves a gap with the inner bottom wall of the through slot 5, thereby ensuring that the function of the through slot 5 can be performed normally. At the same time, the top of the reinforcement strip 8 also forms a cavity 9 due to its protruding setting. The cavity 9 can form a better semi-air insulation effect by being staggered with the through slot 5, and can also play a better auxiliary heat insulation effect.

[0035] Embodiment 2: The solution disclosed in this embodiment is to further improve the structural strength and stability of the cable. Figure 6 As shown, a hollow core 10 is provided inside the reinforcement strip 8, and the inner end of the hollow core 10 is open and connected to the through groove 5. The hollow core 10 is used to further reduce weight and improve the cooling effect. The cable is also provided with a ring portion 11 distributed around the outer surface of the shielding layer 4, wherein the ring portion 11 is used to reinforce the connection stability between the shielding layer 4 and the insulating layer 3 when there are the hollow core 10 and the through groove 5 in the cable. The ring portion 11 is an annular structure with an insulated inner surface and a double-way memory alloy inlaid on the outer surface. The role played by the ring portion 11 is more like a clamp, which is used to reinforce the connection stability of the shielding layer 4. At the same time, since the outer surface of the ring portion 11 is made of memory alloy material and fits the cable surface more closely, when the ambient temperature rather than the cable temperature is abnormally high, the ring portion 11 can also guide the shielding layer 4 to deform in the cavity 9 towards the direction close to the insulating layer 3 by active deformation, thereby improving the safety of the cable as a self-protection means in a temporary emergency situation. After returning to normal temperature, it is sufficient to wait for the memory alloy to automatically deform to guide the shielding layer 4 to deform or to perform manual repair.

[0036] like Figure 8-Figure 9As shown, the outer surface of the reinforcement strip 8 is provided with a reinforcement groove 12 for increasing the friction between the shielding layer 4 and the reinforcement strip 8, and the top area of ​​the side of the reinforcement strip 8 is provided with an air hole 13 running through its side wall, wherein the air hole 13 is used to connect the hollow 10 and the cavity 9. The use of the air hole 13 can guide the fluid into the cavity 9 during the flow of the fluid in the hollow 10, thereby diverting the fluid from the surface area and the core area of ​​the cable for synchronous cooling, which has a better cooling effect and is suitable for environments with high external temperature and high cable workload.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A radio frequency coaxial cable comprising a sheath (1) and a shielding layer (4) wrapped around its inner surface, wherein the shielding layer (4) and a core (2) at the center are coaxially distributed, and the core (2) and the shielding layer (4) contain an insulating layer (3) for wrapping the core (2), characterized in that: The insulating layer (3) is also provided with through slots (5) distributed along the axial direction, wherein the through slots (5) are used to form semi-air insulation in the cable, and the through slots (5) are also used to circulate airflow for cooling the cable during operation.

2. The radio frequency coaxial cable according to claim 1, wherein: The through groove (5) is connected to a gas transmission mechanism installed at the end of the cable, wherein the gas transmission mechanism is made of non-metallic material or copper material.

3. The radio frequency coaxial cable according to claim 2, wherein: The gas transmission mechanism comprises an inner hollow structural ring body (6) surrounding the outside of the insulating layer (3), wherein the input end of the ring body (6) is connected to the air inlet pipe, and the output end is connected to the through groove (5) through a plurality of air outlet pipes (7), wherein the input end is used to be connected to the air supply equipment.

4. The radio frequency coaxial cable according to claim 1, wherein: A reinforcement strip (8) is also fitted and spliced ​​in the through groove (5), wherein the reinforcement strip (8) is also made of a deformable material.

5. The radio frequency coaxial cable according to claim 4, characterized in that: The inner end of the reinforcement strip (8) is spaced apart from the inner end of the through slot (5), and the space is used for airflow. At the same time, the outer end of the reinforcement strip (8) protrudes from the outer edge of the insulating layer (3), so that a cavity (9) is formed between two adjacent reinforcement strips (8), the outer edge of the insulating layer (3) and the shielding layer (4).

6. The radio frequency coaxial cable according to claim 5, characterized in that: A hollow core (10) is provided inside the reinforcing strip (8), the inner end of the hollow core (10) is designed to be open and connected to the through groove (5), and the hollow core (10) is used to further reduce weight and improve the cooling effect.

7. The radio frequency coaxial cable according to claim 6, characterized in that: The cable is also provided with a ring portion (11) distributed around the outer surface of the shielding layer (4), wherein the ring portion (11) is used to strengthen the connection stability between the shielding layer (4) and the insulating layer (3) when a hollow (10) and a through groove (5) are present in the cable.

8. The radio frequency coaxial cable according to claim 7, characterized in that: The ring portion (11) is a ring structure with an insulated inner surface and a double-pass memory alloy inlaid on the outer surface.

9. The radio frequency coaxial cable according to claim 8, characterized in that: The outer surface of the reinforcement strip (8) is provided with a reinforcement groove (12) for increasing the friction between the shielding layer (4) and the reinforcement strip (8).

10. The radio frequency coaxial cable according to claim 8, characterized in that: The top area of ​​the side of the reinforcing strip (8) is provided with an air hole (13) penetrating the side wall thereof, wherein the air hole (13) is used to connect the hollow (10) and the cavity (9).

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