Radio frequency coaxial cable with temperature control function

Abstract

The utility model relates to a radio frequency coaxial cable with a temperature control function. The cable comprises an inner conductor, wherein the inner conductor is of a spiral metal tubular structure; the medium pipeline is nested in the inner conductor, and a cavity loop used for circulation of a temperature control medium is formed between the medium pipeline and the inner conductor; the insulating layer is arranged on the outer side of the inner conductor; the shielding layer is arranged on the outer side of the insulating layer; the buffer layer is arranged on the outer side of the shielding layer; the sheath layer is arranged on the outer side of the buffer layer; the temperature measuring optical fiber is arranged between the buffer layer and the sheath layer, the temperature measuring optical fiber is connected with an external temperature control system and is used for acquiring a temperature signal of the radio frequency coaxial cable in real time, and the external temperature control system is used for controlling circulation of the temperature control medium according to the temperature signal. The utility model solves the problems of signal attenuation and unstable performance in high and low temperature environments, and is suitable for high and low temperature environments or high-frequency signal transmission scenes sensitive to temperature change.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency coaxial cable technology, and in particular to a radio frequency coaxial cable with temperature control function. Background Technology

[0002] Radio frequency (RF) coaxial cables are widely used in high-frequency signal transmission fields such as communications, radar, and electronic equipment. A typical RF coaxial cable consists of an inner conductor, an insulation layer, a shielding layer, and an outer sheath. It primarily relies on the temperature resistance of the materials themselves to withstand extreme high and low temperature environments, such as those used in aerospace, industrial kilns, and communication base stations.

[0003] However, radio frequency coaxial cables are susceptible to temperature effects during operation. For example, rising temperatures can cause changes in the dielectric constant of the insulation material, leading to increased signal attenuation; conductor resistance increases with temperature, affecting signal transmission stability and increasing conductor loss; extreme temperature fluctuations may cause cable structure deformation, reducing shielding performance and service life.

[0004] Therefore, how to effectively improve the transmission stability and reduce signal loss of radio frequency coaxial cables in high and low temperature or temperature-sensitive environments has become an urgent technical problem to be solved. Summary of the Invention

[0005] To address this, the present invention provides a radio frequency coaxial cable with temperature control function, which can achieve constant temperature control through temperature control medium circulation and real-time temperature monitoring, solving the problems of signal attenuation and performance instability in high and low temperature environments, and is suitable for high and low temperature environments or high frequency signal transmission scenarios that are sensitive to temperature changes.

[0006] To solve the above-mentioned technical problems, this utility model provides a radio frequency coaxial cable with temperature control function, comprising:

[0007] The inner conductor has a spiral metal tubular structure;

[0008] A medium conduit is nested inside the inner conductor, and a cavity loop for the circulation of the temperature-controlled medium is formed between the medium conduit and the inner conductor.

[0009] An insulating layer is disposed on the outside of the inner conductor;

[0010] A shielding layer is disposed on the outside of the insulating layer;

[0011] A buffer layer is disposed outside the shielding layer;

[0012] A sheath layer is disposed on the outside of the buffer layer;

[0013] A temperature-sensing optical fiber is disposed between the buffer layer and the sheath layer. The temperature-sensing optical fiber is connected to an external temperature control system for real-time acquisition of the temperature signal of the radio frequency coaxial cable. The external temperature control system is used to control the circulation of the temperature control medium based on the temperature signal.

[0014] In one embodiment of this utility model, the medium pipeline is made of non-metallic material.

[0015] In one embodiment of this utility model, the medium pipeline is made of polytetrafluoroethylene or glass fiber.

[0016] In one embodiment of this utility model, the insulating layer adopts a structure formed by extrusion molding of cross-linked foamed polyethylene or wrapping of polytetrafluoroethylene microporous tape.

[0017] In one embodiment of this utility model, the shielding layer adopts a metal braided, longitudinally wrapped welded corrugated, or metal wrapped structure.

[0018] In one embodiment of this utility model, the buffer layer adopts a non-woven fabric wrapping structure.

[0019] In one embodiment of this utility model, the sheath layer is made of low-smoke halogen-free flame-retardant material or high-temperature resistant flame-retardant material.

[0020] In one embodiment of this utility model, the temperature-measuring optical fiber is laid along the cable axis between the buffer layer and the sheath layer, and is fixed by an optical fiber clamp.

[0021] In one embodiment of this utility model, the cavity circuit includes a first circuit and a second circuit that are interconnected. The first circuit is formed between the outer wall of the medium pipeline and the inner wall of the inner conductor, and the second circuit is formed inside the medium pipeline.

[0022] In one embodiment of this utility model, the external temperature control system includes a wavelength demodulator, a controller, a medium storage tank, a delivery pump, and a heat exchanger;

[0023] The wavelength demodulator is connected to the temperature-sensing optical fiber and is used to collect the temperature signal output by the temperature-sensing optical fiber.

[0024] The medium storage tank is connected to the first circuit via the delivery pump, and the second circuit is connected to the medium storage tank via the heat exchanger. The controller is electrically connected to the wavelength demodulator and the delivery pump, respectively.

[0025] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0026] The present invention discloses a radio frequency coaxial cable with temperature control function, which can achieve constant temperature control through temperature control medium circulation and real-time temperature monitoring, solving the problems of signal attenuation and performance instability in high and low temperature environments. It is suitable for high and low temperature environments or high frequency signal transmission scenarios that are sensitive to temperature changes; it ensures the stable operation of radio frequency coaxial cable in high temperature or temperature-sensitive environments, and is suitable for aerospace, communication base stations, industrial measurement and control and other fields.

[0027] This invention actively regulates the internal temperature of the radio frequency coaxial cable through temperature-controlled medium circulation, offsetting the effects of high and low environmental temperatures and ensuring signal transmission stability. The temperature-sensing fiber optic cable provides real-time temperature data feedback, which, combined with an external temperature control system, enables precise closed-loop control, adapting to a wide temperature range of -40 to +110℃. The spiral inner conductor structure increases the heat exchange area while maintaining flexibility, facilitating installation and bending. The insulation layer uses cross-linked polyethylene or polytetrafluoroethylene to improve the product's temperature resistance and aging resistance. The sheath layer uses low-smoke halogen-free flame-retardant materials or high-temperature flame-retardant materials to enhance safety, making it suitable for harsh environments such as flammable and explosive environments. Attached Figure Description

[0028] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] Figure 1 This is a cross-sectional view of the radio frequency coaxial cable with temperature control function according to this utility model.

[0030] Figure 2 This is a front view of the radio frequency coaxial cable with temperature control function according to this utility model.

[0031] Figure 3 This is a schematic diagram of the cavity circuit with temperature control function of this utility model.

[0032] Figure 4 This is a connection diagram of the external temperature control system of this utility model.

[0033] Explanation of reference numerals in the instruction manual:

[0034] 1. Medium piping;

[0035] 2. Inner conductor;

[0036] 3. Insulation layer;

[0037] 4. Shielding layer;

[0038] 5. Buffer layer;

[0039] 6. Temperature-sensing optical fiber;

[0040] 7. Sheath layer;

[0041] 81. Wavelength demodulator; 82. Controller; 83. Medium storage tank; 84. Transfer pump; 85. Heat exchanger;

[0042] 9. Cavity circuit; 91. First circuit; 92. Second circuit. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0044] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0045] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0046] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0047] Reference Figures 1 to 3 As shown, the present invention provides a radio frequency coaxial cable with temperature control function, comprising:

[0048] Inner conductor 2, wherein the inner conductor 2 is a spiral metal (e.g., copper, aluminum) tubular structure;

[0049] Medium conduit 1 is nested inside the inner conductor 2, and a cavity circuit 9 for the circulation of temperature-controlled medium (such as coolant or gas) is formed between the medium conduit 1 and the inner conductor 2.

[0050] Insulating layer 3 is disposed on the outside of the inner conductor 2;

[0051] Shielding layer 4 is disposed on the outside of insulating layer 3;

[0052] Buffer layer 5 is disposed on the outside of shielding layer 4;

[0053] Sheath layer 7 is disposed on the outside of the buffer layer 5;

[0054] A temperature-sensing optical fiber 6 is disposed between the buffer layer 5 and the sheath layer 7. The temperature-sensing optical fiber 6 is connected to an external temperature control system for real-time acquisition of the temperature signal of the radio frequency coaxial cable. The external temperature control system is used to control the circulation of the temperature control medium according to the temperature signal.

[0055] In one embodiment, the medium pipeline 1 is made of a non-metallic material, such as a polytetrafluoroethylene tube or a glass fiber tube.

[0056] In one embodiment, the insulation layer 3 is 1-10 mm thick, wraps around the outer side of the inner conductor 2, and adopts a structure formed by extrusion molding of cross-linked foamed polyethylene or wrapping of polytetrafluoroethylene microporous tape, providing power insulation and structural support, and has good temperature resistance.

[0057] In one embodiment, the shielding layer 4 has a shielding efficiency of ≥100dB, covers the insulation layer 3, and adopts a metal braided, longitudinally wrapped welded corrugated, or metal wrapped structure to suppress external electromagnetic interference and protect the internal signal transmission of the intelligent temperature-controlled radio frequency coaxial cable.

[0058] In one embodiment, the buffer layer 5 adopts a non-woven fabric wrapping structure with a thickness of 0.1~0.4mm, which plays a good buffering role.

[0059] In one embodiment, the sheath layer 7 is made of low-smoke halogen-free flame-retardant material or high-temperature flame-retardant material (such as silicone rubber), with a thickness of 1~2mm, which serves to protect the cable body.

[0060] In one embodiment, the temperature-measuring optical fiber 6 is laid along the cable axis between the buffer layer 5 and the sheath layer 7, and is fixed by an optical fiber clamp.

[0061] In one embodiment, the cavity circuit 9 includes a first circuit 91 and a second circuit 92 that are interconnected. The first circuit 91 is formed between the outer wall of the medium conduit 1 and the inner wall of the inner conductor 2, and the second circuit 92 is formed inside the medium conduit 1.

[0062] Understandably, the spiral inner conductor 2 and the medium pipeline 1 form a spiral first loop 91, which can increase the heat exchange area while maintaining the flexibility of the inner conductor 2, making it easy to install and bend.

[0063] In one embodiment, refer to Figure 4 As shown, the external temperature control system includes a wavelength demodulator 81, a controller 82, a medium storage tank 83, a delivery pump 84, and a heat exchanger 85;

[0064] The wavelength demodulator 81 is connected to the temperature measuring fiber 6 and is used to collect the temperature signal output by the temperature measuring fiber 6.

[0065] The medium storage tank 83 is connected to the first circuit 91 via the delivery pump 84, and the second circuit 92 is connected to the medium storage tank 83 (containing coolant) via the heat exchanger 85. The controller 82 is electrically connected to the wavelength demodulator 81 and the delivery pump 84 respectively. The heat exchanger 85 is an integrated cooling and heating heat exchanger 85, which can function as a radiator in cooling mode and a heater in heating mode. The controller 82 can be a PLC or a microcontroller.

[0066] With the above settings, the integrated heat exchanger 85 combines heating and cooling functions, and quickly adjusts the temperature of the temperature control medium through heat exchange of the heat exchange medium.

[0067] During operation, the wavelength demodulator 81 transmits the temperature signal collected by the temperature measuring fiber 6 to the controller 82. The controller 82 compares the temperature with the preset temperature threshold. If the temperature exceeds the set range of ±2℃, the delivery pump 84 is started to input constant temperature cooling liquid into the first loop 91. When the temperature control medium flows through the first loop 91 of the spiral cavity, it absorbs (releases) heat. After passing through the second loop 92 and the external heat exchanger 85 to cool (heat up), it returns to the medium storage tank 83 for recycling, forming a closed-loop temperature control.

[0068] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A radio frequency coaxial cable with temperature control function, characterized in that, include: Inner conductor (2), the inner conductor (2) is a spiral metal tubular structure; A medium conduit (1) is nested inside the inner conductor (2), and a cavity circuit (9) for the circulation of temperature control medium is formed between the medium conduit (1) and the inner conductor (2). An insulating layer (3) is disposed on the outside of the inner conductor (2); A shielding layer (4) is disposed on the outside of the insulating layer (3); A buffer layer (5) is disposed on the outside of the shielding layer (4); A sheath layer (7) is disposed on the outside of the buffer layer (5); A temperature-sensing optical fiber (6) is disposed between the buffer layer (5) and the sheath layer (7). The temperature-sensing optical fiber (6) is connected to an external temperature control system for real-time acquisition of the temperature signal of the radio frequency coaxial cable. The external temperature control system is used to control the circulation of the temperature control medium according to the temperature signal.

2. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The medium pipeline (1) is made of non-metallic material.

3. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The medium pipeline (1) is made of polytetrafluoroethylene or glass fiber.

4. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The insulating layer (3) is formed by extrusion molding of cross-linked foamed polyethylene or wrapping of polytetrafluoroethylene microporous tape.

5. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The shielding layer (4) adopts a metal braided, longitudinally wrapped welded corrugated or metal wrapped structure.

6. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The buffer layer (5) adopts a non-woven fabric wrapping structure.

7. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The sheath layer (7) is made of low-smoke halogen-free flame-retardant material or high-temperature flame-retardant material.

8. The radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The temperature-measuring optical fiber (6) is laid along the cable axis between the buffer layer (5) and the sheath layer (7) and is fixed by an optical fiber clamp.

9. A radio frequency coaxial cable with temperature control function according to claim 1, characterized in that, The cavity circuit (9) includes a first circuit (91) and a second circuit (92) that are interconnected. The first circuit (91) is formed between the outer wall of the medium pipeline (1) and the inner wall of the inner conductor (2), and the second circuit (92) is formed inside the medium pipeline (1).

10. A radio frequency coaxial cable with temperature control function according to claim 9, characterized in that, The external temperature control system includes a wavelength demodulator (81), a controller (82), a medium storage tank (83), a delivery pump (84), and a heat exchanger (85). The wavelength demodulator (81) is connected to the temperature measuring fiber (6) and is used to collect the temperature signal output by the temperature measuring fiber (6). The medium storage tank (83) is connected to the first circuit (91) through the delivery pump (84), and the second circuit (92) is connected to the medium storage tank (83) through the heat exchanger (85). The controller (82) is electrically connected to the wavelength demodulator (81) and the delivery pump (84) respectively.

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