Cable and power utilization system

Abstract

The utility model provides a cable and a power utilization system, and belongs to the field of electronic power. The cable comprises a cable body, the cable body comprises a wire, a first insulating layer, a shielding layer and a second insulating layer, the first insulating layer wraps the wire, the shielding layer wraps the first insulating layer, and the second insulating layer wraps the shielding layer; the second insulating layer is provided with an annular notch; the first conductive structure is located at the annular notch and wraps the shielding layer at the annular notch; and the second conductive structure is connected with the first conductive structure and is used for being connected with the outer surface of an electric device. The cable can prevent the electromagnetic field in the electric device from interfering with the cable, and can also prevent the electromagnetic field generated by the cable in the electric device from interfering with other cables.

Description

Technical Field

[0001] The present disclosure relates to the field of power electronics, and in particular to a cable and a power system. Background Art

[0002] Cables are widely used in the field of power electronics, for example in centralized control desks and control cabinets.

[0003] A cable is provided in the related art, including a conductor, a first insulating layer, a shielding layer and a second insulating layer, the first insulating layer wraps the conductor, the shielding layer wraps the first insulating layer, and the second insulating layer wraps the shielding layer. One side of the cable is connected to a through-bay terminal, and is connected to a control machine through the through-bay terminal. The cable is easily interfered by external electromagnetic fields during use, and the cable itself also generates electromagnetic fields that interfere with adjacent cables. In the related art, the shielding layer of the cable is divided into two parts at the through-bay terminal, and the shielding layer located outside the control machine is twisted into a "pig tail" shape on one side close to the through-bay terminal, and is connected to the surface of the control machine through a "pig tail" grounding method, thereby shielding the interference of external electromagnetic fields on the cable through the grounding of the control machine, and also shielding the electromagnetic field generated by the cable from interfering with other cables.

[0004] However, the "pigtail" grounding method has a poor shielding effect on high-frequency electromagnetic signals, and the "pigtail" grounding method is grounded outside the control machine. The shielding layer of the cable inside the control machine cannot be grounded inside the control machine. The "pigtail" grounding method cannot shield the electromagnetic field inside the control machine from interfering with the cable, nor can it shield the electromagnetic field generated by the cable inside the machine from interfering with other cables. Utility Model Content

[0005] The embodiments of the present disclosure provide a cable and a power system, which can prevent the electromagnetic field inside the power device from interfering with the cable, and can also prevent the electromagnetic field of the cable inside the power device from interfering with other cables. The technical solution is as follows:

[0006] In one aspect, a cable is provided, the cable comprising:

[0007] A cable body, the cable body comprising a conductor, a first insulating layer, a shielding layer, and a second insulating layer, the first insulating layer wraps the conductor, the shielding layer wraps the first insulating layer, and the second insulating layer wraps the shielding layer; the second insulating layer has an annular cutout;

[0008] A first conductive structure is located at the annular cutout and wraps the shielding layer at the annular cutout;

[0009] The second conductive structure is connected to the first conductive structure and is used to connect to the outer surface of the electrical device.

[0010] Optionally, the first conductive structure is a ring clamp.

[0011] Optionally, the annular clamp includes a first conductive part and a second conductive part, the middle parts of the first conductive part and the second conductive part are semicircular, and both ends of the first conductive part and the second conductive part are detachably connected by bolts.

[0012] Optionally, the second conductive structure is a stuffing box.

[0013] Optionally, the stuffing box is any one of a welded stuffing box, a riveted stuffing box, a clamped stuffing box, and a tubular stuffing box.

[0014] Optionally, the cable further comprises:

[0015] A fixed structure, one end of which is fixedly connected to the first conductive structure, and the other end of which is fixedly connected to the second conductive structure.

[0016] Optionally, the fixing structure is arranged around the first conductive structure, and a side of the fixing structure away from the second conductive structure is sealed from the cable body.

[0017] Optionally, the fixed structure includes a first cylindrical hollow structure and a second cylindrical hollow structure, the second cylindrical hollow structure is located between the first cylindrical hollow structure and the second conductive structure, and the diameter of the second cylindrical hollow structure is greater than the diameter of the first cylindrical hollow structure;

[0018] The first cylindrical hollow structure is arranged around the surface of the second insulating layer, the second cylindrical hollow structure is arranged around the first conductive structure, and the inner wall of one end of the second cylindrical hollow structure is connected to the outer wall of one end of the first cylindrical hollow structure;

[0019] The second conductive structure is detachably connected to the other end of the second cylindrical hollow structure via bolts.

[0020] Optionally, the cable body includes a plurality of wires.

[0021] On the other hand, a power system is provided, the power system comprising: a power device and a cable, the cable being the cable as described in any one of the above items;

[0022] The first conductive structure of the cable is located inside the electrical device, and the second conductive structure of the cable is connected to the outer surface of the electrical device.

[0023] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0024] In an embodiment of the present disclosure, the second insulating layer outside the shielding layer of the cable has an annular incision, and the first conductive structure wraps the shielding layer at the annular incision, and is connected to the outer surface of the electrical device through the second conductive structure, so that the shielding layer is grounded under the action of the conductive structure and the electrical device to shield the interference of the external electromagnetic field on the cable, and at the same time shield the interference of the electromagnetic field generated by the cable itself on other cables. Since the first conductive structure of the cable provided by the present disclosure can be located inside the electrical device, it can shield the interference of the electromagnetic field on the cable inside the electrical device, and shield the interference of the electromagnetic field generated by the cable inside the electrical device on other cables. In addition, since the conductive structure is arranged around the shielding layer, the shielding layer can be grounded 360°, and the second conductive structure is connected to the outer surface of the electrical device to achieve the grounding of the shielding layer, thereby reducing the impedance and improving the shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 is a structural schematic diagram of a cable provided by an embodiment of the present disclosure;

[0027] Figure 2 is a cross-sectional view of a cable body provided by an embodiment of the present disclosure;

[0028] Figure 3 is a structural schematic diagram of a cable body provided by an embodiment of the present disclosure;

[0029] Figure 4 A schematic diagram of the structure of another cable provided in an embodiment of the present disclosure;

[0030] Figure 5 A schematic diagram of the structure of another cable provided in an embodiment of the present disclosure.

[0031] The attached marks are as follows:

[0032] 11: Cable body; 12: Electrical device; 13: Fixed structure.

[0033] 20: annular cutout; 21: first conductive structure; 22: second conductive structure.

[0034] 101: conductor; 102: first insulating layer; 103: shielding layer; 104: second insulating layer.

[0035] 201: first conductive portion; 202: second conductive portion.

[0036] 301: first cylindrical hollow structure; 302: second cylindrical hollow structure; 303: annular protrusion. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0038] Figure 1 A schematic diagram of the structure of a cable provided by an embodiment of the present disclosure. Figure 1 The cable includes: a cable body 11, a first conductive structure 21 and a second conductive structure 22.

[0039] Figure 2 A cross-sectional view of a cable body provided by an embodiment of the present disclosure. Figure 2 The cable body 11 includes: a wire 101, a first insulating layer 102, a shielding layer 103 and a second insulating layer 104, the first insulating layer 102 wraps the wire 101, the shielding layer 103 wraps the first insulating layer 102, and the second insulating layer 104 wraps the shielding layer 103.

[0040] Figure 3 A schematic diagram of the structure of a cable body provided by an embodiment of the present disclosure. Figure 3 The second insulating layer 104 has an annular cutout 20, and the second insulating layer 104 at the annular cutout 20 is peeled off to expose the shielding layer 103. In the embodiment of the present disclosure, a portion of the second insulating layer 104 is peeled off to facilitate the subsequent arrangement of the first conductive structure 21.

[0041] See again Figure 1 The first conductive structure 21 is located at the annular incision and wraps the shielding layer at the annular incision; the second conductive structure 22 is connected to the first conductive structure 21 and is used to connect to the outer surface of the electrical device 12.

[0042] In an embodiment of the present disclosure, the second insulating layer outside the shielding layer of the cable has an annular incision, and the first conductive structure wraps the shielding layer at the annular incision, and is connected to the outer surface of the electrical device through the second conductive structure, so that the shielding layer is grounded under the action of the conductive structure and the electrical device to shield the interference of the external electromagnetic field on the cable, and at the same time shield the interference of the electromagnetic field generated by the cable itself on other cables. Since the first conductive structure of the cable provided by the present disclosure can be located inside the electrical device, it can shield the interference of the electromagnetic field on the cable inside the electrical device, and shield the interference of the electromagnetic field generated by the cable inside the electrical device on other cables. In addition, since the conductive structure is arranged around the shielding layer, the shielding layer can be grounded 360°, and the second conductive structure is connected to the outer surface of the electrical device to achieve the grounding of the shielding layer, thereby reducing the impedance and improving the shielding effect.

[0043] In the embodiment of the present disclosure, the electrical device 12 may be a control machine, and no matter the cable is located inside or outside the control machine, or passes through the control machine, the above-mentioned method may be used for grounding.

[0044] The conductor 101 is a columnar solid structure, and the first insulating layer 102, the shielding layer 103 and the second insulating layer 104 are all columnar hollow structures.

[0045] Of course, the shapes of the wire 101 , the first insulating layer 102 , the shielding layer 103 and the second insulating layer 104 are only used as an example. In actual practice, the wire 101 , the first insulating layer 102 , the shielding layer 103 and the second insulating layer 104 may also be other shapes.

[0046] In the embodiment of the present disclosure, the cable body 11 includes a plurality of wires 101 .

[0047] Exemplarily, the number of the wires 101 is ten.

[0048] In the embodiment of the present disclosure, multiple wires are provided for conducting electricity, which can improve the conductive performance of the cable.

[0049] In the embodiment of the present disclosure, the shielding layer 103 may be a cylindrical hollow structure, and the side wall of the cylindrical hollow structure is a mesh structure.

[0050] In this implementation, the shielding layer 103 of the above structure is provided to achieve the shielding effect on the electromagnetic field.

[0051] In the embodiment of the present disclosure, the first conductive structure 21 is a ring clamp.

[0052] In the disclosed embodiment, the annular clamp is in closer contact with the shielding layer, thereby preventing the first conductive structure from being in less close contact with the shielding layer, which is not conducive to 360° grounding of the shielding layer and affects the electromagnetic field shielding effect.

[0053] Figure 4 This is a schematic diagram of the structure of another cable provided by an embodiment of the present disclosure. Figure 4 The first conductive structure 21 includes a first conductive part 201 and a second conductive part 202. The middle parts of the first conductive part 201 and the second conductive part 202 are semicircular, and both ends of the first conductive part 201 and the second conductive part 202 are detachably connected by bolts.

[0054] In this implementation, a detachable ring clamp is used as the first conductive structure 21. During use, the ring clamp is more convenient to connect.

[0055] In the embodiment of the present disclosure, the second conductive structure 22 is a stuffing box.

[0056] In the embodiment of the present disclosure, it is more convenient to use a stuffing box as the second conductive structure 22. The stuffing box can be connected to an electrical device to prevent the conductive structure from moving during use. The stuffing box is a metal structure to ensure conductive performance.

[0057] In the embodiment of the present disclosure, one end of the second conductive structure 22 that contacts the first conductive portion 201 has an annular protrusion 303 .

[0058] In a possible implementation provided by the present disclosure, the outer wall of the second conductive structure 22 has threads, one end of which is fixedly connected to the annular protrusion 303 via threads, and the other end of the second conductive structure 22 passes through the electrical device 12 and is located outside the electrical device 12 and is fixedly connected to a nut via threads.

[0059] In the disclosed embodiment, the stuffing box is any one of a welded stuffing box, a riveted stuffing box, a clamped stuffing box, and a tubular stuffing box.

[0060] In the disclosed embodiment, a stuffing box of the above structure is used to fix the cable and the electrical device to prevent the cable from moving during use.

[0061] Figure 5 This is a schematic diagram of the structure of another cable provided by an embodiment of the present disclosure. Figure 5 The cable further includes a fixing structure 13 . One end of the fixing structure 13 is fixed to the first conductive structure 21 , and the other end of the fixing structure 13 is fixed to the second conductive structure 22 .

[0062] The first conductive structure and the second conductive structure are further fixed by the fixing structure to avoid the first conductive structure and the second conductive structure being separated and affecting the grounding effect of the shielding layer.

[0063] In the embodiment of the present disclosure, the fixing structure 13 is arranged around the first conductive structure 21 , and a side of the fixing structure 13 away from the second conductive structure 22 is sealed from the cable body 11 .

[0064] In the embodiment of the present disclosure, a fixed structure 13 is provided surrounding the first conductive structure 21, and a side of the fixed structure 13 away from the second conductive structure 22 is sealed from the cable body 11 to ensure the tightness of the connection between the first conductive structure 21, the second conductive structure 22 and the cable body.

[0065] In the embodiment of the present disclosure, the fixed structure 13 includes a first cylindrical hollow structure 301 and a second cylindrical hollow structure 302, wherein the second cylindrical hollow structure 302 is located between the first cylindrical hollow structure 301 and the second conductive structure 22, and the diameter of the second cylindrical hollow structure 302 is greater than the diameter of the first cylindrical hollow structure 301;

[0066] The first cylindrical hollow structure 301 is arranged around the surface of the second insulating layer 104, the second cylindrical hollow structure 302 is arranged around the first conductive structure 21, and the inner wall of one end of the second cylindrical hollow structure 302 is connected to the outer wall of one end of the first cylindrical hollow structure 301;

[0067] The second conductive structure 22 is detachably connected to the other side of the second cylindrical hollow structure 302 by bolts.

[0068] In the embodiment of the present disclosure, a first cylindrical hollow structure 301 and a second cylindrical hollow structure 302 are provided. The first cylindrical hollow structure 301 is arranged around the second insulating layer 104 of the cable, and the second cylindrical hollow structure 302 is arranged around the first conductive structure 21. The first cylindrical hollow structure 301 is tightly combined with the cable body 11, and the second cylindrical hollow structure 302 is tightly combined with the first conductive structure 21. Thus, the first cylindrical hollow structure 301 and the second cylindrical hollow structure 302 are connected and fixed to the second cylindrical hollow structure 22, and the second conductive structure 22 is fixedly connected to the electrical device 12. Thus, the fixed structure 13 can fix the first conductive structure 21 and the second conductive structure 22 while fixing the cable.

[0069] like Figure 5 As shown, the side wall of the second cylindrical hollow structure 302 is provided with two hollows, and the two hollows are used to expose the bolt structures for locking the first conductive part 201 and the second conductive part 202 respectively.

[0070] The present disclosure also provides an electricity system, which includes an electricity device 12 and a cable, wherein the cable is as follows: Figures 1 to 5 Any of the cables shown.

[0071] The cable is located inside the electric device, one end of the cable is connected to a controller in the electric device, and the other end of the cable passes through the electric device and is connected to an outer surface of the electric device.

[0072] In the embodiments of the present disclosure, the cable with the above structure can realize the grounding of the shielding layer of the cable inside the electrical device to prevent the cable inside the electrical device from being interfered by the electromagnetic field, and can also prevent the electromagnetic field generated by the cable from interfering with other cables.

[0073] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A cable, characterized in that: Cables Included: A cable body (11), the cable body (11) comprising a conductor (101), a first insulating layer (102), a shielding layer (103) and a second insulating layer (104), the first insulating layer (102) wrapping the conductor, the shielding layer (103) wrapping the first insulating layer (102), and the second insulating layer (104) wrapping the shielding layer (103); the second insulating layer (104) having an annular cutout (20); A first conductive structure (21) is located at the annular cutout (20) and wraps around the shielding layer (103) at the annular cutout (20); The second conductive structure (22) is connected to the first conductive structure (21) and is used to connect to the outer surface of the electrical device (12).

2. The cable according to claim 1, characterized in that: The first conductive structure (21) is a ring clamp.

3. The cable according to claim 2, characterized in that: The annular clamp comprises a first conductive part (201) and a second conductive part (202); the middle parts of the first conductive part (201) and the second conductive part (202) are semicircular; and the two ends of the first conductive part (201) and the second conductive part (202) are detachably connected by bolts.

4. The cable according to claim 1, characterized in that: The second conductive structure (22) is a stuffing box.

5. The cable according to claim 4, characterized in that: The stuffing box is any one of a welded stuffing box, a riveted stuffing box, a clamped stuffing box, and a tubular stuffing box.

6. The cable according to claim 1, characterized in that: The cable also has: A fixed structure (13), one end of the fixed structure (13) being fixedly connected to the first conductive structure (21), and the other end of the fixed structure (13) being fixedly connected to the second conductive structure (22).

7. The cable according to claim 6, characterized in that: The fixed structure (13) is arranged around the first conductive structure (21), and a side of the fixed structure (13) away from the second conductive structure (22) is sealed from the cable body (11).

8. The cable according to claim 7, characterized in that: The fixed structure (13) comprises a first cylindrical hollow structure (301) and a second cylindrical hollow structure (302), wherein the second cylindrical hollow structure (302) is located between the first cylindrical hollow structure (301) and the second conductive structure (22), and the diameter of the second cylindrical hollow structure (302) is greater than the diameter of the first cylindrical hollow structure (301); The first columnar hollow structure (301) is arranged around the surface of the second insulating layer (104), the second columnar hollow structure (302) is arranged around the first conductive structure (21), and the inner wall of one end of the second columnar hollow structure (302) is connected to the outer wall of one end of the first columnar hollow structure (301); The second conductive structure (22) is detachably connected to the other end of the second cylindrical hollow structure (302) via bolts.

9. The cable according to any one of claims 1 to 8, characterized in that: The cable body (11) comprises a plurality of wires (101).

10. An electricity system, characterized in that: The power system comprises: a power device (12) and a cable, wherein the cable is the cable according to any one of claims 1 to 9; The first conductive structure (21) of the cable is located inside the electrical device (12), and the second conductive structure (22) of the cable is connected to the outer surface of the electrical device (12).

Images