Frost crack prevention flexible power cable and flexible power cable anti-freezing system

Abstract

The utility model provides an anti-frost-crack flexible power cable which comprises a hollow outer protection layer and a plurality of core wires arranged in the outer protection layer, the anti-frost-crack flexible power cable further comprises an isolation layer and a heating body, the isolation layer wraps the plurality of core wires, and the isolation layer is located between the core wires and the outer protection layer; the heating body is arranged between the isolation layer and the outer protection layer, and the heating body can emit heat after being powered on so as to heat the outer protection layer. The anti-frost-crack flexible power cable can reduce or avoid the risk that the outer protection layer is frost-cracked in a low-temperature application scene, and the use safety and reliability of the flexible power cable in the low-temperature application scene are improved. The utility model also provides a flexible power cable anti-freezing system.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable structure technical field especially is related to a kind of flexible power cable and flexible power cable freeze-proof system of anti-freezing crack. BACKGROUND

[0002] Flexible power cable is a kind of commonly used cable, which is widely used in power transmission, data transmission, communication control and other scenes. The commonly used flexible power cable generally includes outer protective layer (i.e. armor layer) and a plurality of core wires arranged in the outer protective layer. The outer protective layer is generally made of rubber material.

[0003] In some low-temperature application scenarios, when the ambient temperature is too low, the outer protective layer may be frozen and cracked due to the material properties of the outer protective layer, thereby shortening the service life of the flexible power cable and affecting the safety and reliability of the flexible power cable. SUMMARY

[0004] The utility model aims to provide a kind of flexible power cable of anti-freezing crack, which can reduce or avoid the risk of outer protective layer being frozen and cracked in low-temperature application scenarios, improve the safety and reliability of flexible power cable in low-temperature application scenarios.

[0005] The utility model provides a kind of flexible power cable of anti-freezing crack, including hollow outer protective layer and a plurality of core wires arranged in the outer protective layer, the flexible power cable of anti-freezing crack further includes insulating layer and heating body, the insulating layer is wrapped in the outer portion of a plurality of the core wire, and the insulating layer is located between the core wire and the outer protective layer;The heating body is arranged between the insulating layer and the outer protective layer, and the heating body can generate heat after being energized to heat the outer protective layer.

[0006] In an implementable manner, the heating body is arranged on the outer wall of the insulating layer.

[0007] In an implementable manner, the outer wall of the insulating layer is provided with a receiving groove, and the heating body is arranged in the receiving groove.

[0008] In an implementable manner, the heating body does not protrude from the outer wall of the insulating layer, and the part of the outer wall of the insulating layer where the receiving groove is not arranged is in contact with the inner wall of the outer protective layer.

[0009] In an implementable manner, the heating body includes two electrode rods and a plurality of heating rings, the plurality of heating rings are all sleeved outside the insulating layer, and the plurality of heating rings are arranged in the axial direction of the insulating layer at intervals;The opposite sides of each heating ring are respectively connected to the two electrode rods.

[0010] In an implementable manner, the heating body is a heating wire sleeved outside the insulation layer, and the heating wire is in a spiral structure.

[0011] In an implementable manner, the heating body is a heating net sleeved outside the insulation layer, and the heating net is in a cylindrical structure.

[0012] In an implementable manner, the insulation layer is made of an insulating material.

[0013] In an implementable manner, the anti-freezing flexible power cable further comprises a temperature sensor arranged on an outer wall of the outer protective layer, and the temperature sensor is configured to detect the temperature of the outer protective layer.

[0014] The utility model also provides a kind of anti-freezing system of flexible power cable, including control module and the anti-freezing flexible power cable as described above, the control module includes control unit and power supply unit, the power supply unit is electrically connected with the heating body, and the power supply unit is used to power supply the heating body, and the control unit is electrically connected with the power supply unit and the temperature sensor respectively;The control unit is used to control the on-off between the power supply unit and the heating body according to the temperature detected by the temperature sensor.

[0015] The anti-freezing flexible power cable provided by the utility model, by arranging the heating body between the insulation layer and the outer protective layer, the heating body can generate heat after being powered on, so as to heat the outer protective layer, thereby reducing or avoiding the risk of the outer protective layer being frozen in the low-temperature application scenario, and improving the use safety and reliability of the flexible power cable in the low-temperature application scenario. At the same time, the heating body and the core wire are separated by the insulation layer, the insulation layer can improve the electrical insulation between the heating body and the core wire on the one hand, and the insulation layer can reduce or avoid the heat generated by the heating body from being conducted to the core wire on the other hand, so that the heating body does not affect the normal work of the core wire during the heating process. At the same time, the insulation layer can also protect the core wire together with the outer protective layer. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the anti-freezing flexible power cable in the embodiment of the utility model.

[0017] Figure 2 It is a three-dimensional structure schematic view of the heating body in the embodiment of the utility model.

[0018] Figure 3 It is Figure 2 side view.

[0019] Figure 4 It is a three-dimensional structure schematic view of the insulation layer in the embodiment of the utility model.

[0020] Figure 5 It is the schematic diagram of the three-dimensional structure of the heating body in another embodiment of the utility model.

[0021] Figure 6 It is the schematic diagram of the three-dimensional structure of the heating body in another embodiment of the utility model.

[0022] Figure 7 It is the structure block diagram of the flexible power cable anti-freezing system in the embodiment of the utility model. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0024] The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the utility model are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0025] The upper, lower, left, right, front, back, top, bottom and the like (if any) in the specification and claims of the utility model are defined by the position of the structure in the drawing and the position of the structure relative to each other in the drawing, just to express the technical scheme clearly and conveniently. It should be understood that the use of the orientation words should not limit the scope of the utility model claimed.

[0026] As shown in Figures 1 to 4 The utility model discloses a flexible power cable of anti-freezing crack, which comprises a hollow outer protective layer 1 and a plurality of core wires 4 (generally at least three) arranged in the outer protective layer 1, and the cross section of the outer protective layer 1 is in the shape of a circular ring. The flexible power cable of anti-freezing crack further comprises an insulating layer 3 and a heating body 2, the cross section of the insulating layer 3 is in the shape of a circular ring, the insulating layer 3 is wrapped outside the plurality of core wires 4, and the insulating layer 3 is located between the core wires 4 and the outer protective layer 1. The insulating layer 3 is made of insulating material, specifically, the insulating layer 3 is made of insulating and heat-insulating material. The heating body 2 is arranged between the insulating layer 3 and the outer protective layer 1, and the heating body 2 can generate heat after being electrified to heat the outer protective layer 1.

[0027] The flexible power cable against freezing and cracking provided by the embodiment of the utility model, by setting the heating body 2 between the insulation layer 3 and the outer protective layer 1, the heating body 2 can generate heat after being electrified, thereby heating the outer protective layer 1, further reducing or avoiding the risk of the outer protective layer 1 being frozen and cracked in the low-temperature application scene, improving the use safety and reliability of the flexible power cable in the low-temperature application scene. At the same time, since the heating body 2 and the core wire 4 are separated by the insulation layer 3, on the one hand, the insulation layer 3 can play an insulating role to improve the electrical insulation between the heating body 2 and the core wire 4, and on the other hand, the insulation layer 3 can play a heat insulation role to reduce or avoid the heat generated by the heating body 2 from being conducted to the core wire 4, thereby making the heating body 2 not affect the normal work of the core wire 4 in the heating process; at the same time, the insulation layer 3 can also play a protective role on the core wire 4 together with the outer protective layer 1.

[0028] It should be noted that the heating temperature of the heating body 2 after being electrified should not be too high (for example, controlled at about 40-70 DEG C), so as to avoid the heat melting damage of the outer protective layer 1 and the insulation layer 3 caused by the excessively high heating temperature, and therefore the heating power of the heating body 2 needs to be controlled.

[0029] As shown in Figures 1 to 4 , as an embodiment, the heating body 2 is arranged on the outer wall of the insulation layer 3. The outer wall of the insulation layer 3 is provided with a receiving groove 31, and the heating body 2 is arranged in the receiving groove 31. The heating body 2 does not protrude from the outer wall of the insulation layer 3 (that is, the depth of the receiving groove 31 is greater than or equal to the thickness of the heating body 2, and the heating body 2 can be completely accommodated in the receiving groove 31), and the part of the outer wall of the insulation layer 3 where the receiving groove 31 is not arranged is attached to the inner wall of the outer protective layer 1. By such arrangement, not only can the heat generated by the heating body 2 be better conducted to the outer protective layer 1, but also the outer wall of the insulation layer 3 and the inner wall of the outer protective layer 1 can be tightly attached, preventing the insulation layer 3 and the outer protective layer 1 from relatively sliding along the axial direction, and ensuring the structural strength of the whole flexible power cable.

[0030] As shown in Figures 1 to 4 , as an embodiment, the heating body 2 includes two electrode rods 21 and a plurality of heating rings 22, and the electrode rods 21 and the heating rings 22 are both metal materials. The heating ring 22 is in the form of a circular ring, the plurality of heating rings 22 are all sleeved outside the insulation layer 3, and the plurality of heating rings 22 are arranged at intervals along the axial direction of the insulation layer 3. The two electrode rods 21 both extend along the axial direction of the insulation layer 3, and the opposite sides of each heating ring 22 are respectively connected with the two electrode rods 21 (specifically, the heating ring 22 and the electrode rod 21 can be fixed by welding). The heating ring 22 can generate heat after being electrified, and the two electrode rods 21 are respectively connected with the positive and negative electrodes of the power supply unit 7, thereby supplying power to the plurality of heating rings 22.

[0031] Specifically, in this embodiment, the receiving groove 31 is configured to conform to the heating element 2. The receiving groove 31 includes two longitudinal grooves 311 and multiple annular grooves 312. The longitudinal grooves 311 extend along the axial direction of the insulating layer 3, and the two longitudinal grooves 311 are respectively located on opposite sides of the outer wall of the insulating layer 3. The annular grooves 312 are annular structures that surround the insulating layer 3 circumferentially, and the multiple annular grooves 312 are spaced apart along the axial direction of the insulating layer 3. Two electrode rods 21 are respectively located in the two longitudinal grooves 311, and multiple heating rings 22 are respectively located in the multiple annular grooves 312. In this embodiment, the insulating layer 3 can be formed based on the heating element 2. For example, when manufacturing the insulating layer 3, the heating element 2 can be used as a skeleton, and the insulating layer 3 can be obtained by injection molding or vulcanization molding using plastic or rubber materials on the basis of the heating element 2; thus, there is no need to assemble the heating element 2 and the insulating layer 3 subsequently.

[0032] In one implementation, the spacing between adjacent heating rings 22 is 1cm to 5cm, thereby avoiding excessive spacing that would reduce the heating effect (if the spacing is too large, the heating uniformity of each part of the outer protective layer 1 will be poor).

[0033] like Figure 5 As shown, in another embodiment, the heating element 2 is a heating wire sleeved outside the insulating layer 3. The heating wire has a spiral structure (i.e., the heating wire is a spiral wire), and the two ends of the heating wire are respectively used to connect to the positive and negative terminals of the power supply unit 7, thereby supplying power to the heating wire. In this case, the receiving groove 31 on the outer wall of the insulating layer 3 needs to be set into a spiral structure that conforms to the shape of the heating wire.

[0034] like Figure 6 As shown, in another embodiment, the heating element 2 is a heating mesh sleeved outside the insulating layer 3. The heating mesh has a cylindrical structure (i.e., the heating element 2 is a cylindrical mesh structure). The two ends of the heating mesh are respectively used to connect to the positive and negative poles of the power supply unit 7, thereby supplying power to the heating mesh. In this case, the receiving groove 31 on the outer wall of the insulating layer 3 needs to be set as a mesh structure that conforms to the shape of the heating mesh.

[0035] like Figure 1 As shown, in one embodiment, the core wire 4 includes an insulating sheath 41 and a conductor 42 disposed within the insulating sheath 41. The number of conductors 42 is one or more, and the conductors 42 can be copper wire, aluminum wire, etc. The cross-section of the insulating sheath 41 is a circular ring structure.

[0036] In one implementation, the outer protective layer 1 is made of rubber. The insulating layer 3 and the insulating outer sheath 41 can be made of insulating materials such as rubber, polyurethane, polyester, polyesterimide, and polyamideimide.

[0037] As an implementation form, the anti-freezing flexible power cable further comprises a temperature sensor 5 arranged on the outer wall of the outer protective layer 1, and the temperature sensor 5 is used for detecting the temperature of the outer protective layer 1. The temperature sensor 5 can be a ring type temperature sensor (for the specific structure of the ring type temperature sensor, refer to CN204301881U and the like), and the ring type temperature sensor is sleeved outside the outer protective layer 1.

[0038] As shown in Figure 7 The utility model embodiment further provides a flexible power cable anti-freezing system, including the electric control module and the anti-freezing flexible power cable as described above, the electric control module includes control unit 6 and power supply unit 7, power supply unit 7 is electrically connected with heating body 2, and power supply unit 7 is used to power supply heating body 2;Control unit 6 is electrically connected with power supply unit 7 and temperature sensor 5 respectively, and control unit 6 is used to control the on-off between power supply unit 7 and heating body 2 (that is, control the opening and closing of power supply unit 7 to heating body 2) according to the temperature detected by temperature sensor 5.

[0039] Specifically, the control unit 6 can be a microcontroller (MCU) or the like, and the power supply unit 7 can include a power supply battery or the like (of course, the power supply unit 7 can also be a device for accessing commercial power. According to different use scenarios, as long as the power supply unit 7 can play a power supply role). When the flexible power cable works in a low-temperature environment, when the temperature sensor 5 detects that the temperature of the outer protective layer 1 is lower than the preset value (for example, lower than 0 DEG C), the control unit 6 controls the power supply unit 7 to supply power to the heating body 2, and the heating body 2 generates heat after being powered on, and the outer protective layer 1 is heated to a temperature greater than or equal to the set value (for example, heated to greater than or equal to 5 DEG C), and the control unit 6 controls the power supply unit 7 to stop supplying power to the heating body 2; repeat the above steps to control the temperature of the outer protective layer 1 within the preset range, thereby avoiding the outer protective layer 1 from being frozen.

[0040] The above is only a specific implementation form of the utility model, but the protection scope of the utility model is not limited to this, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A flexible power cable resistant to freeze cracking, comprising a hollow outer protective layer (1) and a plurality of core wires (4) arranged within the outer protective layer (1), characterized in that, The anti-freezing and anti-cracking flexible power cable further comprises an insulation layer (3) and a heating body (2), the insulation layer (3) is wrapped outside the plurality of core wires (4), and the insulation layer (3) is located between the core wires (4) and the outer protective layer (1); the heating body (2) is arranged between the insulation layer (3) and the outer protective layer (1), and the heating body (2) can generate heat after being powered on to heat the outer protective layer (1).

2. The freeze resistant flexible power cable of claim 1, wherein, The heating body (2) is arranged on the outer wall of the insulation layer (3).

3. The freeze resistant flexible power cable of claim 2, wherein, The outer wall of the insulation layer (3) is provided with a receiving groove (31), and the heating body (2) is arranged in the receiving groove (31).

4. The freeze resistant flexible power cable of claim 3, wherein, The heating body (2) does not protrude from the outer wall of the insulation layer (3), and the part of the outer wall of the insulation layer (3) where the receiving groove (31) is not arranged is attached to the inner wall of the outer protective layer (1).

5. The freeze resistant flexible power cable of claim 2, wherein, The heating body (2) comprises two electrode rods (21) and a plurality of heating rings (22), the plurality of heating rings (22) are all sleeved outside the insulation layer (3), and the plurality of heating rings (22) are arranged at intervals along the axial direction of the insulation layer (3); the opposite sides of each heating ring (22) are respectively connected to the two electrode rods (21).

6. The freeze resistant flexible power cable of claim 2, wherein, The heating body (2) is a heating wire sleeved outside the insulation layer (3), and the heating wire has a spiral structure.

7. The freeze resistant flexible power cable of claim 2, wherein, The heating body (2) is a heating net sleeved outside the insulation layer (3), and the heating net has a cylindrical structure.

8. The freeze resistant flexible power cable of claim 1, wherein, The insulation layer (3) is made of an insulating material.

9. The freeze resistant flexible power cable of any of claims 1-8, wherein, The anti-freezing and anti-cracking flexible power cable further comprises a temperature sensor (5), the temperature sensor (5) is arranged on the outer wall of the outer protective layer (1), and the temperature sensor (5) is used for detecting the temperature of the outer protective layer (1).

10. A flexible power cable freeze protection system characterized by, The anti-freezing and anti-cracking flexible power cable comprises an electric control module and the anti-freezing and anti-cracking flexible power cable as claimed in claim 9, the electric control module comprises a control unit (6) and a power supply unit (7), the power supply unit (7) is electrically connected to the heating body (2), the power supply unit (7) is used for supplying power to the heating body (2); the control unit (6) is electrically connected to the power supply unit (7) and the temperature sensor (5) respectively, and the control unit (6) is used for controlling the on-off of the power supply unit (7) and the heating body (2) according to the temperature detected by the temperature sensor (5).

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