Air-cooled cable device

Abstract

The utility model relates to the technical field of power transmission cables, in particular to an air-cooled cable device. The device comprises a cable body. The cable body comprises a protective sleeve, a spring arranged in the protective sleeve, an electric conductor arranged in an annular space formed between the protective sleeve and the spring, and a fixing pipe arranged at the end of the spring and used for supporting the end of the electric conductor. The spring is communicated with an inner cavity of the fixing pipe to form the fixing pipe of the ventilation channel. The cooling device is simple in structure, good in cooling effect and convenient to use, the electric conductor is placed in the annular space formed by the spring and the protective sleeve, heat generated by the electric conductor can be rapidly diffused to the inner cavity of the spring through the spiral gap of the spring and is taken away by airflow, and the cooling device has a better cooling effect and a great popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission cables, and particularly refers to an air-cooled cable device. Background Art

[0002] During the charging and discharging process of cables, a large amount of heat will be generated. In order to reduce the heat generation of the cables, conventional cables on the market often need to select cables with a larger cross-section, which will result in low utilization rate of copper materials, higher costs, and greater weights.

[0003] Patent publication number "CN106847377A" discloses a high-temperature resistant air-cooled cable, including a hollow rubber tube inner core. The hollow rubber tube inner core includes an inner-layer hollow pipe and an outer-layer hollow pipe. A plurality of conductor pipes are clamped between the inner-layer hollow pipe and the outer-layer hollow pipe, and each conductor pipe is provided with a conductor. For the air-cooled cable of the above patent, the conductor for power supply is arranged in the conductor pipe, and the conductor pipe is clamped between the inner-layer hollow pipe and the outer-layer hollow pipe. The heat generated by the conductor needs to pass through two layers of pipes before it can be carried away by the air flow, which is not convenient for spreading to the inner-layer hollow pipe, and the cooling effect needs to be improved. Summary of the Utility Model

[0004] The main purpose of the utility model is to solve the deficiencies of the above background art and provide an air-cooled cable device with a better cooling effect.

[0005] The technical solution adopted by the utility model is: an air-cooled cable device, including a cable body. The cable body includes a protective sleeve, a spring arranged in the protective sleeve, a conductor arranged in the annular space formed between the protective sleeve and the spring, and a support for supporting the end of the conductor arranged at the end of the spring; the spring communicates with the inner cavity of the fixed pipe to form a ventilation channel.

[0006] Further, a limiting structure is arranged on the fixed pipe for axially fixing the fixed pipe and the spring in the axial direction of the spring.

[0007] Further, the limiting structure includes a limiting groove arranged in the middle of the outer peripheral side of the fixed pipe; the radial dimensions of the fixed pipe on both sides of the limiting groove are greater than the inner diameter of the end of the spring, and a guiding structure for inserting the spring is arranged at the end of the fixed pipe.

[0008] Further, the guiding structure includes a chamfer structure or an arc-shaped structure formed by the circumferential outer wall of the fixed pipe and its end face.

[0009] Further, the inner diameter of the end of the spring is smaller than the inner diameter of the middle of the spring; the fixed pipe is adaptively inserted into the inner cavity of the spring to support the conductor through the spring.

[0010] Further, the spring and the conductor are insulated from each other.

[0011] Further, an insulating layer is provided on the surface of the spring wire of the spring.

[0012] Further, an insulating layer for the conducting wire is provided on the surface of the conductor.

[0013] Further, the device further includes an electrode connector, which is fixedly arranged at the end of the cable body and connected to the conductor, and the electrode connector is provided with a vent hole communicating with the inner cavity of the spring.

[0014] Further, the device further includes a gas driving device, which is communicated with the vent hole and is used for sucking or blowing in gas.

[0015] Further, the gas driving device is connected to the vent holes on the electrode connectors at the ends of multiple cable bodies through pipelines.

[0016] Further, the gas driving device includes an air extractor, and the air extractor is connected to the vent hole at one end of the cable body, and an inert gas is introduced into the other end of the cable body.

[0017] Further, the inert gas includes nitrogen.

[0018] Further, the electrode connector includes a connecting sleeve for fixedly connecting the end of the cable body and an electrode plate fixedly arranged on the connecting sleeve; the vent hole is provided on the connecting sleeve.

[0019] Further, the vent hole is a threaded hole.

[0020] Further, the electrode plate is provided with an electrode connection hole.

[0021] On the other hand, the present utility model further provides a method for press-fitting a cable joint, which uses the air-cooled cable device provided by the present utility model for press-fitting. The press-fitting method includes:

[0022] Install a fixing tube at the end of the spring so that the fixing tube can radially support the end of the conductor;

[0023] Socket the electrode connector on the end of the conductor, and select a suitable pressing die to press-fit the electrode connector.

[0024] According to a method for press-fitting a cable joint provided by the present utility model, the step of installing a fixing tube at the end of the spring so that the fixing tube can radially support the end of the conductor includes inserting the guiding structure of the fixing tube from the end of the spring until the end of the spring is clamped in the limiting groove;

[0025] According to a method for press-fitting a cable joint provided by the present utility model, the step of installing a fixing tube at the end of the spring so that the fixing tube can radially support the end of the conductor includes sleeving the fixing tube outside the end of the spring to directly radially support the end of the conductor;

[0026] According to a method for press-fitting a joint of a cable provided by the present utility model, the method of installing a fixing tube at the end of a spring to enable the fixing tube to radially support the end of a conductor includes inserting the fixing tube into a cavity formed by the conductor extending out of the spring end to radially support the conductor, and making the end face of the fixing tube abut against the spring end face to limit the fixing tube.

[0027] According to a method for press-fitting a joint of a cable provided by the present utility model, the method of sleeving an electrode joint on the end of a conductor includes peeling off a protective sleeve at the end of a cable body to expose the conductor, and sleeving the electrode joint on the circumferential outside of a plurality of conductors to communicate the ventilation holes with a ventilation channel.

[0028] The beneficial effects of the present utility model include: 1. The cable device prevents the conductor through the annular space between the spring and the protective sleeve. The heat generated by the conductor can directly enter the inner cavity of the spring through the spiral gap of the spring and be carried away by the air flow. Without the inner layer of hollow pipes for heat insulation, it has a better cooling effect; the fixing tube can support the conductor to prevent the ventilation channel from being blocked or narrowed when the cable body is crimping the electrode joint;

[0029] 2. The fixing tube can be axially fixed to the spring through the limiting structure, avoiding the fixing tube being overly pressed into the inner cavity of the spring when installing the electrode joint, and being unable to support the spring at the end of the spring, resulting in the air flow channel being blocked or narrowed;

[0030] 3. The limiting structure of the fixing tube is very simple. The dimensions of the fixing tube on both sides of the limiting groove are larger. After inserting the spring, the end of the spring can be stuck on the groove wall of the limiting groove through the limiting groove, realizing the axial fixation of the fixing tube and the spring on the spring; the guiding structure at the end of the fixing tube facilitates insertion into the inner cavity of the spring;

[0031] 4. The guiding structure of the present utility model is very simple. The end face dimension of the fixing tube is smaller than the inner diameter of the spring end through a chamfer structure or an arc-shaped structure, which is convenient for inserting into the inner cavity of the spring and is also convenient for production and manufacturing;

[0032] 5. When the inner diameter of the spring end is smaller than the inner diameter of the spring middle, it is convenient to axially fix the spring to the fixing tube;

[0033] 6. The insulation setting between the spring and the conductor can prevent the spring from generating heat when energized and extend the service life of the spring;

[0034] 7. The electrode joint of the present utility model is provided with ventilation holes communicating with the inner cavity of the spring, which can be used to discharge the hot air flow in the cable body;

[0035] 8. Through a gas driving device, the hot air flow in the cable body can be sucked or cold air can be blown into the cable body to take away the heat of the cable body, achieving a cooling effect;

[0036] 9. The gas driving device of the present utility model can be connected to multiple cable bodies to jointly suck or blow in gas, realizing one-to-many management, saving the number of gas driving devices, and improving the utilization rate of the gas driving devices;

[0037] 10. By using an air extractor to extract air from one end of the cable body and introducing inert gas at the other end of the cable body, the effect of air-cooling can be achieved, and at the same time, the conductor can be prevented from being oxidized, improving the service life of the cable body;

[0038] 11. The connecting sleeve of the electrode joint can be used for crimping and sleeving on the outer circumference of multiple conductors, and the power supply or electrical equipment can be connected through the electrode plate;

[0039] 12. When the ventilation hole on the electrode joint of the present utility model adopts a threaded hole structure, it is convenient to connect the pipeline of the gas driving device to the electrode joint, which is convenient to use;

[0040] 13. The cable joint pressing method provided by the present utility model makes full use of the advantages of the air-cooled cable device of the present utility model. The pressing method is simple and convenient to operate. The fixed pipe and the spring can be fixed axially on the spring axis, and the deformation of the conductor can be avoided during the pressing process to prevent the ventilation channel from being blocked or narrowed.

[0041] The air-cooled cable device involved in the present utility model has a simple structure, good cooling effect, and is convenient to use. The conductor is placed in the annular space formed by the spring and the protective sleeve, so that the heat generated by the conductor can be quickly diffused to the inner cavity of the spring through the spiral gap of the spring and then taken away by the air flow, having a higher cooling effect. At the same time, it can prevent the cable body from deforming during the pressing of the electrode joint, resulting in the blockage or narrowing of the ventilation channel, and has great popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 : Schematic structural diagram of the air-cooled cable device of the present utility model;

[0043] Figure 2 : Schematic cross-sectional structure diagram of the cable body;

[0044] Figure 3 : Schematic structural diagram of the fixed pipe connecting the spring;

[0045] Figure 4 : Schematic diagram of an embodiment of the structure of the air-cooled cable device of the present utility model;

[0046] Figure 5 : Schematic structural diagram of the reduced end of the spring;

[0047] Wherein: 1 - cable body; 11 - protective sleeve; 12 - spring; 13 - conductor; 14 - fixed tube; 141 - limiting groove; 142 - guiding structure; 2 - electrode connector; 21 - connecting sleeve; 22 - electrode plate; 221 - electrode connection hole; 211 - ventilation hole. Specific embodiments

[0048] Embodiments of the present invention will be described in detail below, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] The present invention relates to an air-cooled cable device. An annular space for placing the conductor 13 is formed between the protective sleeve 11 and the spring 12 provided in the protective sleeve 11. Due to the spiral characteristics of the spring 12, the spiral gap allows the heat generated by the conductor 13 to be dissipated to the inner cavity of the spring 12 through gas, so that the heat is carried away by the gas flowing in the spring 12. There is no inner hollow pipe for heat insulation involved in the background art, solving the problem that the cooling effect in the background art needs to be improved. At the same time, it can avoid the deformation of the cable body during the pressing of the electrode connector, resulting in the blockage or narrowing of the ventilation channel, and is convenient to operate and use, with great promotion value.

[0053] An air-cooled cable device, such as Figures 1 to 5As shown in the figure, it includes a cable body 1, and the cable body 1 includes a protective sleeve 11, a spring 12, a conductor 13, and a fixing pipe 14; the protective sleeve 11 is preferably made of an insulating and heat-resistant material. The spring 12 is sleeved inside the protective sleeve 11, and the conductor 13 is arranged in the annular space formed between the protective sleeve 11 and the spring 12. During specific use, a conductive wire such as a copper wire can be used as the conductor 13. The fixing pipe 14 is arranged at the end of the spring 12, and the inner cavity of the spring 12 communicates with the inner cavity of the fixing pipe 14 to form a ventilation channel. The fixing pipe 14 is used to radially support the conductor 13 to prevent the conductor 13 and the spring 12 from deforming during the press-fitting of the electrode joint 2, causing the ventilation channel to be blocked or narrowed. Compared with the inner hollow pipe in the background art, the present utility model uses the spring 12 as a support member to support the conductor 13. The inner cavity of the spring 12 forms a ventilation channel, and the spiral gap of the spring 12 allows hot air to directly enter the cavity of the spring 12. The heat dissipated in the gas is easily carried away by the air flow in the inner cavity of the spring 12, improving the cooling effect; at the same time, the fixing pipe 14 can radially support the conductor 13, and can prevent the conductor 13 and the spring 12 from deforming during the press-fitting of the electrode joint 2, causing the ventilation channel to be blocked or narrowed.

[0054] In some embodiments, as Figure 3 shown in the figure, the fixing pipe 14 is improved. The fixing pipe 14 is provided with a limiting structure for axially fixing the fixing pipe 14 and the spring 12 to prevent the fixing pipe 14 from moving excessively axially into the inner cavity of the spring 12 during the installation of the electrode joint 2, resulting in the fixing pipe 14 not supporting the conductor 13 at the end of the spring 12 during the press-fitting of the electrode joint 2, causing the ventilation channel to be blocked or narrowed.

[0055] Based on the limiting structure, a specific solution of the limiting structure is shown in this embodiment, as Figure 3 shown in the figure. The limiting structure includes a limiting groove 141 provided in the middle of the outer circumference of the fixing pipe 14. The radial dimensions of the fixing pipe 14 on both sides of the limiting groove 141 are larger than the inner diameter of the end of the spring 12. The end (one end or both ends) of the fixing pipe 14 is provided with a guiding structure 142 for inserting into the spring 12. Since the fixing pipe 14 on both sides of the limiting groove 141 is larger than the inner diameter of the end of the spring 12, the fixing pipe 14 can be inserted into the inner cavity of the spring 12 through the guiding structure 142 at the end and expand the inner diameter of the spring 12. During the continuous insertion of the fixing pipe 14, when the end of the spring 12 moves into the limiting groove 141, it radially contracts, and the side wall of the limiting groove 141 can limit the end of the spring 12, realizing the axial fixation of the fixing pipe 14 and the spring 12 on the spring 12.

[0056] Based on the guiding structure 142, as Figure 3As shown, the guiding structure 142 includes a chamfered structure or an arc-shaped structure formed by the circumferential outer wall of the fixed tube 14 and its end face, enabling its end face to be inserted into the inner cavity of the end of the spring 12. The chamfered structure and the arc-shaped structure are simple, facilitating production and use.

[0057] There are various ways to arrange the fixed tube 14 at the end of the spring 12 to radially support the conductor 13. In this embodiment, the axial length of the spring 12 is shorter than the length of the conductor 13, causing the end of the conductor 13 to extend beyond the end of the spring 12. The fixed tube 14 is arranged along the axial direction of the spring 12 at the end face of the spring 12, and its circumferential side wall directly contacts and supports the conductor 13. This way, the fixed tube 14 can be completely arranged within the cavity formed by the conductor 13, which is beneficial for shortening the length of the electrode joint 2 to be press-fitted.

[0058] In addition, the fixed tube 14 can also be sleeved on the circumferential outer side of the end of the spring 12 to directly contact and support the conductor 13.

[0059] In some embodiments, as Figure 5 shown, the inner diameter of the end of the spring 12 is smaller than the inner diameter of the middle part of the spring 12; for example, the inner diameter formed by the spiral of two or three turns of the spring wire at the end of the spring 12 is smaller than the inner diameter beside the end of the spring 12 (i.e., the middle part of the spring 12); the fixed tube 14 is adaptively inserted into the inner cavity of the spring 12 to support the conductor 13 through the spring 12, and the outer diameter of the fixed tube 14 is larger than the inner diameter of the end of the spring 12. In this way, the fixed tube 14 is clamped by the end of the spring 12 with a smaller inner diameter, enabling the fixed tube 14 to have a certain fixing effect in the axial direction of the spring 12.

[0060] Based on the fact that the inner diameter of the end of the spring 12 is smaller than the inner diameter of the middle part of the spring 12, the guiding structure 142 at the end of the fixed tube 14 can be inserted into the inner cavity of the spring 12 from the end of the spring 12 until the end face of the spring 12 is clamped in the limiting groove 141. When the fixed tube 14 is inserted, the smaller inner diameter of the end of the spring 12 expands radially first, and then contracts radially when reaching the limiting groove 141 and is clamped in the limiting groove 141, which can enhance the axial fixing effect. Preferably, the outer diameter of the fixed tube 14 at both ends of the limiting groove 141 is adapted to the inner diameter of the middle part of the spring 12, and the outer diameter of the fixed tube 14 at the limiting groove 141 is slightly larger than the inner diameter of the end of the spring 12, enabling the end of the spring 12 to be tightly clamped in the limiting groove 141 and not easily slip out.

[0061] In some embodiments, there is an insulating arrangement between the spring 12 and the conductor 13. For example, an insulating layer can be added to cover the surface of the spring wire of the spring 12, or a spring 12 made of a non-conductive material can be used, or a wire insulating layer is sleeved on the circumferential outer edge of the conductor 13. The wire insulating layer can be separately provided on each conductor, or an insulating pipe can be used as the wire insulating layer to sleeve multiple conductors 13 to form a conductor group, and multiple insulating pipes are respectively sleeved on multiple conductors 13 to form multiple conductor groups. The insulating arrangement methods include but are not limited to the several methods exemplified in this text. In addition, the fixed pipe 14 can also be insulated from the conductor 13. The fixed pipe 14 can be made of an insulating rigid material, or a fixed pipe insulating layer is covered on its surface.

[0062] In a further embodiment, as Figures 1 to 2 shown, the air-cooled cable device further includes an electrode connector 2. The electrode connector 2 is fixedly arranged at the end of the cable body 1 and connected to the conductor 13, and is used to connect the cable body 1 to a power source or an electrical device. The electrode connector 2 is provided with a ventilation hole 211 communicating with the inner cavity of the spring 12. The ventilation hole 211 can communicate with the fixed pipe 14 so as to communicate with the inner cavity of the spring 12, enabling the hot air in the inner cavity of the spring 12 to flow out through the ventilation hole 211. During specific use, multiple conductors 13 are evenly spaced in the annular space formed between the spring 12 and the protective sleeve 11. The protective sleeve 11 at the end of the cable body 1 exposes the conductors 13, and the electrode connector 2 is installed on the exposed multiple conductors 13.

[0063] In a certain embodiment, the air-cooled cable device further includes a gas driving device. The gas driving device is connected to the ventilation hole 211 and is used to suck the hot air in the inner cavity of the spring 12 or blow cold air into the inner cavity of the spring 12 through the ventilation hole 211, so as to quickly discharge the heat in the cable body 1.

[0064] Based on the air-cooled cable device including a gas driving device, the gas driving device is connected to the ventilation holes 211 on the electrode connectors 2 at the ends of multiple cable bodies 1 through pipelines, that is, one gas driving device drives the air flow in multiple cable bodies 1 to flow, realizing one-to-many management, reducing the number of gas driving devices, improving the utilization efficiency of the gas driving device, and saving costs.

[0065] Based on the air-cooled cable device including a gas driving device, in this embodiment, an air extractor is used as the gas driving device. Specifically, the air extractor is connected to the ventilation hole 211 at one end of the cable body 1, and the other end of the cable body 1 is connected to an air chamber in which an inert gas is stored. When the air extractor operates, it sucks the hot air inside the cable body 1, and the inert gas at a lower temperature is sucked into the inner cavity of the spring 12 of the cable body 1 under the negative pressure generated by the air extractor, and the heat generated by the conductor 13 is taken away through the flow; using the inert gas can prevent the conductor 13 and the spring 12 from being oxidized and extend the service life of the cable body 1; nitrogen can be used as the inert gas, which has a lower cost.

[0066] In another embodiment, the main difference from using an air extractor is that a blower is used as the gas driving device. The air outlet pipeline of the blower is connected to the ventilation port of the cable body 1, and the air inlet of the blower is connected to the air chamber storing the inert gas. The blower is used to blow the inert gas at a lower temperature into the inner cavity of the spring 12 of the cable body 1 and flow out through the other end of the cable body 1, which can take away the heat generated by the conductor 13.

[0067] Based on the electrode joint 2, this embodiment specifically describes the electrode joint 2, such as Figure 1 or Figure 4 as shown ( Figure 4 the arrow direction in which indicates the air flow direction), the electrode joint 2 includes a connecting sleeve 21 and an electrode plate 22. The connecting sleeve 21 is provided with the above-mentioned ventilation hole 211. The connecting sleeve 21 is sleeved and press-fitted on the outer circumference of a plurality of conductors 13, so that the ventilation hole 211 communicates with the inner cavity of the spring 12; the connecting sleeve 21 is sleeved and press-fitted on a plurality of conductors 13 exposed at the end of the cable body 1; the electrode plate 22 is provided with an electrode connection hole 221 for connecting a power source or an electrical device.

[0068] Based on the electrode joint 2 being provided with the ventilation hole 211, in some embodiments, a threaded hole is used as the ventilation hole 211, which is convenient for the pipeline connecting the gas driving device to be connected to the ventilation hole 211 on the electrode joint 2 through a threaded structure.

[0069] Based on the gas driving device, the air-cooled cable device of the present utility model further includes a cooling mechanism. The cooling mechanism is connected to the gas driving device, the cable body 1, and the air chamber through pipelines to form a loop for cooling the hot air flowing out of the cable body 1 and then transporting it back to the air chamber for recycling, which can prevent the leakage of the inert gas and save costs. Specifically, when in use, the air outlet of the cooling mechanism is sequentially connected to the air chamber, the ventilation hole 211 at one end of the cable body 1, the gas driving device connecting the ventilation hole 211 at the other end of the cable body 1, and the air inlet of the cooling mechanism is connected to the air outlet of the gas driving device.

[0070] On the other hand, the present utility model also provides a method for press-fitting an electrode joint of a cable. The press-fitting is performed using the air-cooled cable device provided by the present utility model, and is used for press-fitting an electrode joint 2 at the end of a hollow cable. The press-fitting method includes,

[0071] S1. Install the fixing tube 14 at the end of the spring 12 so that the fixing tube 14 can radially support the end of the conductor 13;

[0072] S2. Socket the electrode joint 2 on the end of the conductor 13, and select a suitable pressing die to press-fit the electrode joint 2.

[0073] According to the method for press-fitting an electrode joint of a cable provided by the present utility model, installing the fixing tube 14 at the end of the spring 12 so that the fixing tube 14 can radially support the end of the conductor 13 includes,

[0074] S11. Insert the guiding structure 142 of the fixing tube 14 from the end of the spring 12 until the end of the spring 12 is clamped in the limiting groove 141;

[0075] S12. Sleeve the fixing tube 14 outside the end of the spring 12 to directly radially support the end of the conductor 13, and the outer diameter of the end of the spring 12 is smaller than the outer diameter of the middle part of the spring 12;

[0076] During specific installation, the outer diameter of the middle part of the spring 12 can be designed to be larger than the inner diameter of the fixing tube 14, so that during the process of sleeving the fixing tube 14 on the end of the spring 12, the end face of the inserting end of the fixing tube 14 is abutted and limited by the middle part of the spring 12, avoiding excessive insertion and being unable to support the conductor 13 at the end of the conductor 13;

[0077] S13. Insert the fixing tube 14 into the cavity formed by the conductor 13 extending out of the end of the spring 12 to radially support the conductor 13, and make the end face of the fixing tube 14 abut against the end face of the spring 12 to limit the fixing tube 14.

[0078] The method of inserting the fixing tube 14 into the spring 12 so that the fixing tube 14 can radially support the end of the conductor 13 includes but is not limited to the above three methods provided by the present utility model, and one of the above three methods can be selected according to the actual situation.

[0079] According to the method for press-fitting an electrode joint of a cable provided by the present utility model, socketing the electrode joint 2 on the end of the conductor 13 includes,

[0080] S21. Peel off the protective sleeve 11 at the end of the cable body to expose the conductor 13, and socket the electrode joint 2 on the outer circumference of multiple conductors 13 so that the ventilation holes are communicated with the ventilation channels.

[0081] When the fixed tube 14 is arranged at the end of the spring 12 to support the conductor 13, when the electrode connector 2 is press-fitted, due to the support of the fixed tube 14, the deformation of the conductor 13 can be avoided, which may cause the ventilation channel to be blocked or narrowed. At the same time, the connecting sleeve 21 of the electrode connector 2 is deformed and press-connected to the end of the conductor 13 to form a complete cable.

[0082] In actual use, the conductors 13 are evenly distributed in the annular space formed by the spring 12 and the protective sleeve 11. The fixed tubes 14 are inserted into both ends of the spring 12 so that the limit grooves 141 hold the ends of the spring 12. Then, the connecting sleeve 21 of the electrode connector 2 is sleeved and press-fitted on the exposed multiple conductors 13 at both ends of the cable body 1 to form a complete cable. One end of the cable body 1 is connected to an air extractor through the vent hole 211, and the vent hole 211 at the other end of the cable body 1 is connected to a gas chamber filled with inert gas. Multiple cable bodies 1 are connected to the air extractor and the gas chamber at both ends respectively according to the above method. When the cable body 1 transmits power through the electrode connectors 2 at both ends to connect the power supply and the electrical equipment, the air extractor can be used to cool the cable body 1 by air cooling.

[0083] 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 only illustrate the principles of 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 of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air-cooled cable device, characterized in that: include, A cable body (1) comprises a protective sleeve (11), a spring (12) arranged in the protective sleeve (11), a conductor (13) arranged in an annular space formed between the protective sleeve (11) and the spring (12), and a fixing tube (14) arranged at the end of the spring (12) for supporting the end of the conductor (13); the inner cavities of the spring (12) and the fixing tube (14) are connected to form a ventilation channel.

2. An air-cooled cable device as claimed in claim 1, characterized in that: The fixing tube (14) is provided with a limiting structure for fixing the fixing tube (14) and the spring (12) in the axial direction of the spring (12).

3. An air-cooled cable device as claimed in claim 2, characterized in that: The limiting structure comprises a limiting groove (141) provided in the middle of the outer circumference of the fixing tube (14); the radial dimensions of the fixing tube (14) on both sides of the limiting groove (141) are larger than the inner diameter of the end of the spring (12); and the end of the fixing tube (14) is provided with a guide structure (142) for inserting the spring (12).

4. An air-cooled cable device as claimed in claim 3, characterized in that: The guide structure (142) comprises a chamfered structure or an arc-shaped structure formed between the circumferential outer wall of the fixed tube (14) and its end surface.

5. An air-cooled cable device according to any one of claims 1 to 4, characterized in that: The inner diameter of the end of the spring (12) is smaller than the inner diameter of the middle of the spring (12); the fixing tube (14) is adapted to be inserted into the inner cavity of the spring (12) to support the conductor (13) through the spring (12).

6. An air-cooled cable device according to claim 1, characterized in that: The spring (12) and the conductor (13) are insulated from each other.

7. An air-cooled cable device according to claim 1, characterized in that: It also comprises an electrode connector (2), wherein the electrode connector (2) is fixedly mounted at the end of the cable body (1) and connected to the conductor (13), and a vent hole (211) communicating with the inner cavity of the spring (12) is provided on the electrode connector (2).

8. An air-cooled cable device as claimed in claim 7, characterized in that: It also comprises a gas driving device, which is connected to the vent hole (211) and is used for sucking or blowing in gas.

9. An air-cooled cable device as claimed in claim 8, characterized in that: The gas driving device comprises an air pump, the air pump is connected to the vent hole (211) at one end of the cable body (1), and the other end of the cable body (1) is connected to the inert gas.

10. An air-cooled cable device according to claim 7, characterized in that: The electrode connector (2) comprises a connecting sleeve (21) for fixing the end of the cable body (1) and an electrode plate (22) fixed on the connecting sleeve (21); the connecting sleeve (21) is provided with the vent hole (211).

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