Self-heat-dissipation type control cable

Abstract

This invention discloses a self-heating control cable with three or more main rainwater collection pipes. Regardless of the cable angle, there is always an upward-opening rainwater collection pipe. A slider inside the main rainwater collection pipe slides under the influence of gravity. The slider in the upward-opening rainwater collection pipe is located at the end closest to the outer casing. Rainwater and mist from the air enter the cooling chamber through the secondary rainwater collection pipe. The slider in the downward-opening rainwater collection pipe is located at the end closest to the top opening, blocking the opening. Water in the cooling chamber can only slowly flow out from the gap between the slider and the main rainwater collection pipe. By setting the size of the slider, the accumulation rate of water in the cooling chamber is made greater than the outflow rate, ensuring sufficient water in the cooling chamber while also allowing it to slowly flow out, interacting with the outside temperature and reducing the temperature of the cable core.

Description

Technical Field

[0001] This invention relates to the field of cables, and more specifically to a self-heating control cable. Background Technology

[0002] As the number of electrical devices in the circuit continues to increase, the current carried by the cable is also increasing. Furthermore, as the cable is used for a long time, it will age and its current carrying capacity will decrease to varying degrees. Once the current exceeds the rated current carrying capacity, the cable will heat up. After reaching a certain temperature, the cable will break down and burn, which may even lead to a fire. Ordinary power cables cannot achieve self-measurement and self-cooling functions.

[0003] There are many existing technologies that can improve its cooling performance.

[0004] For example, Chinese patent application number 201610073342.5 discloses a cooling and rodent-proof warning cable, which includes a conductor, an insulation layer, a first insulation layer, a cooling layer, a second insulation layer, a flame-retardant layer, a sheath, encapsulated microparticles, an outer sheath, reflective strips, and light-emitting lines. The conductor is externally extruded with an insulation layer, the insulation layer is externally extruded with a first insulation layer, the first insulation layer is externally extruded with a cooling layer, the cooling layer is externally extruded with a second insulation layer, the second insulation layer is externally extruded with a flame-retardant layer, the flame-retardant layer is externally extruded with a sheath, and the sheath is externally extruded with an outer sheath.

[0005] The above improvements have enhanced the cooling capacity of the cable. However, these improvements are mainly achieved by adding a cooling layer, which has a limited effect on reducing the internal temperature of the cable. In practice, a more effective cooling structure is needed. Summary of the Invention

[0006] Purpose of the Invention: To overcome the problems existing in the prior art, this invention provides a self-heating control cable with three or more main rainwater collection pipes. Regardless of the cable angle, there is always an upward-opening rainwater collection pipe. A slider inside the main rainwater collection pipe slides under gravity. The slider in the upward-opening rainwater collection pipe is located at the end closest to the outer casing. Rainwater and mist from the air enter the cooling chamber through the secondary rainwater collection pipe. The slider in the downward-opening rainwater collection pipe is located at the end closest to the top opening, blocking the opening. Water in the cooling chamber can only slowly flow out through the gap between the slider and the main rainwater collection pipe. By setting the size of the slider, the accumulation rate of water in the cooling chamber is made greater than the outflow rate, ensuring sufficient water in the cooling chamber while allowing it to slowly flow out, interacting with the outside temperature and reducing the temperature of the cable core.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A self-heating control cable includes three or more inner cores, an outer sheath, and a cooling cavity. The cooling cavity includes an intermediate cavity disposed between the inner cores and an outer sheath disposed between the outer sheath and the inner cores. There are gaps between the inner cores. Each outer sheath is in contact with at least two inner cores. A rainwater collection main pipe is disposed on the outer sheath facing the outer sheath. Side openings are provided on both sides of the middle end of the rainwater collection main pipe. Rainwater collection secondary pipes are disposed on the side openings facing the outer sheath. A slider with the same cross-section in the width direction and capable of sliding along its length direction is disposed inside the rainwater collection main pipe. The outer sheath and the intermediate cavity are connected by a connecting pipe. The rainwater collection main pipe is provided with a top opening for communicating with the outside of the cable. The top opening of the rainwater collection main pipe is smaller than the width of the slider. The connection between the rainwater collection main pipe and the outer sheath is smaller than the width of the slider. The distance from the side opening to the top opening is greater than the height of the slider. The distance from the side opening to the outer sheath is greater than the height of the slider.

[0009] Preferably, the outer sheath is provided with protrusions that avoid the top opening, the protrusions are arranged along the length of the cable, and the material of the protrusions is rubber.

[0010] Preferably, the cable core comprises, from the inside out, a conductor, a first fireproof layer, a first outer waterproof layer, and a first insulation layer.

[0011] Preferably, the outer sheath comprises, from the inside out, a second fireproof layer, a second waterproof layer, a second insulating layer, and a protective layer.

[0012] Preferably, the gaps between the inner core, the outer sheath, and the cooling cavity are filled with glass fiber.

[0013] Preferably, the cooling cavity is filled with metal spheres.

[0014] Preferably, a filter screen is provided at the top opening.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Three or more main rainwater collection pipes are installed. Regardless of the cable angle, there is always an upward-facing rainwater collection pipe. The slider inside the main rainwater collection pipe slides under the action of gravity. The slider in the upward-facing rainwater collection pipe is located at the end closer to the outer casing. Rainwater and mist in the air enter the cooling chamber through the rainwater collection secondary pipe. The slider in the downward-facing rainwater collection pipe is located at the end closer to the top opening, blocking the opening. Water in the cooling chamber can only slowly flow out from the gap between the slider and the main rainwater collection pipe. By setting the size of the slider, the accumulation rate of water in the cooling chamber is made greater than the outflow rate, ensuring sufficient water in the cooling chamber while also allowing it to slowly flow out, interacting with the outside temperature and reducing the temperature of the cable core.

[0017] 2. It is equipped with metal spheres to ensure the water level in the cooling chamber is maintained during periods of low rainfall, thus ensuring the cooling effect on the upper cable core.

[0018] 3. Equipped with a filter screen to prevent dust in the air from entering the cooling chamber and affecting the cable life. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 2 For details of the present invention Figure 1 ;

[0021] Figure 3 For details of the present invention Figure 2 ;

[0022] The components are: 1. Inner core; 11. Conductor; 12. First fireproof layer; 13. First waterproof layer; 14. First insulation layer; 2. Outer sheath; 21. Second fireproof layer; 22. Second waterproof layer; 23. Second insulation layer; 24. Protective layer; 3. Cooling cavity; 4. Main rainwater collection pipe; 41. Side opening; 42. Top opening; 421. Filter screen; 5. Sub-pipe for rainwater collection; 6. Sliding block; 7. Protrusion. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-3 As shown, a self-heating control cable includes multiple sets of inner cores 1, an outer sheath 2, and a cooling cavity 3. The cooling cavity 3 includes an intermediate cavity 31 disposed between the multiple sets of inner cores 1 and an outer sheath 32 disposed between the outer sheath 2 and the inner cores 1. There are gaps between the inner cores 1. Each outer sheath 32 is in contact with at least two inner cores 1. A rainwater collection main pipe 4 is disposed on the outer sheath 32 facing the outer sheath 2. Side openings 41 are opened on both sides of the middle end of the rainwater collection main pipe 4. Rainwater collection secondary pipes are disposed on the side openings 41 facing the outer sheath 32. 5. The rainwater collection main pipe 4 is provided with a slider 6 that has the same cross-section in the width direction and can slide along its length direction. The outer cavity 32 and the middle cavity 31 are connected by a connecting pipe 33. The rainwater collection main pipe 4 is provided with a top opening 42 for communicating with the outside of the cable. The top opening 42 of the rainwater collection main pipe 4 is smaller than the width of the slider 6. The connection port between the rainwater collection main pipe 4 and the outer cavity 32 is smaller than the width of the slider 6. The distance from the side opening 41 to the top opening 42 is greater than the height of the slider. The distance from the side opening 41 to the outer cavity 32 is greater than the height of the slider 6.

[0025] Preferably, the outer sheath 2 is provided with a protrusion 7, which avoids the top opening 42. The protrusion 7 is arranged along the length of the cable, and the material of the protrusion 7 is rubber.

[0026] Preferably, the inner core 1 includes, from the inside out, a conductor 11, a first fireproof layer 12, a first outer waterproof layer 13, and a first insulating layer 14.

[0027] Preferably, the outer sheath 2 includes, from the inside out, a second fireproof layer 21, a second outer waterproof layer 22, a second insulating layer 23, and a protective layer 24.

[0028] Preferably, the gaps between the inner core 1, the outer sheath 2, and the cooling cavity 3 are filled with glass fiber.

[0029] Preferably, the cooling cavity 3 is filled with metal spheres.

[0030] Preferably, a filter screen 421 is provided at the top opening 42.

[0031] The purpose of the above embodiments is to reproduce and derive the technical solution of the present invention by way of example, and to fully describe the technical solution, purpose and effect of the present invention. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosure of the present invention, and not to limit the scope of protection of the present invention.

[0032] The above embodiments are not an exhaustive list based on the present invention, and there may be many other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A self-heating control cable, characterized in that: It includes three or more sets of inner cores (1), outer sheaths (2), and cooling cavities (3). The cooling cavities (3) include an intermediate cavity (31) disposed between multiple sets of inner cores (1) and an outer sheath cavity (32) disposed between the outer sheath (2) and the inner cores (1). There are gaps between the inner cores (1). Each outer sheath cavity (32) is in contact with at least two inner cores (1). A rainwater collection main pipe (4) is provided on the outer sheath cavity (32) facing the outer sheath (2). Side openings (41) are provided on both sides of the middle end of the rainwater collection main pipe (4). A rainwater collection secondary pipe (5) is provided on the side openings (41) facing the outer sheath cavity (32). The water collection main pipe (4) is provided with a slider (6) that has the same cross-section in the width direction and can slide along its length direction. The outer cavity (32) and the middle cavity (31) are connected by a connecting pipe (33). The rainwater collection main pipe (4) is provided with a top opening (42) for communicating with the outside of the cable. The top opening (42) of the rainwater collection main pipe (4) is smaller than the width of the slider (6). The connection between the rainwater collection main pipe (4) and the outer cavity (32) is smaller than the width of the slider (6). The distance from the side opening (41) to the top opening (42) is greater than the height of the slider. The distance from the side opening (41) to the outer cavity (32) is greater than the height of the slider (6).

2. The self-heating control cable according to claim 1, characterized in that: The outer sheath (2) is provided with a protrusion (7), which avoids the top opening (42). The protrusion (7) is arranged along the length of the cable and is made of rubber.

3. The self-heating control cable according to claim 1, characterized in that: The inner core (1) includes, from the inside out, a conductor (11), a first fireproof layer (12), a first outer waterproof layer (13), and a first insulating layer (14).

4. The self-heating control cable according to claim 1, characterized in that: The outer sheath (2) includes, from the inside out, a second fireproof layer (21), a second waterproof layer (22), a second insulating layer (23), and a protective layer (24).

5. A self-heating control cable according to claim 1, characterized in that: The gaps between the inner core (1), the outer sheath (2), and the cooling cavity (3) are filled with glass fiber.

6. A self-heating control cable according to claim 1, characterized in that: The cooling cavity (3) is filled with metal spheres.

7. A self-heating control cable according to claim 1, characterized in that: A filter screen (421) is provided at the top opening (42).

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