Variable frequency power cable with shield

Abstract

The utility model relates to variable frequency cable technical field especially relates to a kind of variable frequency power cable with shielding, including cable, the cable one end is provided with connecting assembly, the connecting assembly includes threaded tube, the threaded tube one end array is provided with clamping plate, the clamping plate end is provided with arc protrusion, the midpoint of threaded tube is provided with limit plate, the limit plate one side is provided with the threaded sleeve of being connected with threaded tube thread, the limit plate other side is provided with the line pipe of being connected with threaded tube thread.The utility model is by cable in threaded sleeve and threaded tube in turn, rotate threaded sleeve, arc protrusion on clamping plate shrink inwards when passing arc surface, it is fixed by being tightly pressed on cable, can effectively fix cable, after cable stripping, single cable is passed through wire slot, then tighten wire clamp, so that interference fit between wire clamp and cable, can effectively fix single cable.

Description

Technical Field

[0001] This utility model relates to the field of frequency conversion cable technology, and in particular to a shielded frequency conversion power cable. Background Technology

[0002] The frequency conversion cable consists of three main insulated wires and three neutral insulated wires. An inner wrapping layer, a copper tape layer, an outer wrapping layer, and an outer sheath layer are sequentially arranged outside the main insulated wires and the neutral insulated wires to form a 3+3 core structure. This gives the cable strong resistance to voltage surges and enables it to withstand the pulse voltage during high-speed and frequent frequency conversion, thus providing good protection for frequency conversion electrical appliances.

[0003] A search of Chinese patent CN220672261U reveals a shielded variable frequency power cable.

[0004] The above technical solution includes: a conductor, an insulation layer extruded on the outer surface of the conductor, a silver-plated copper strip braided layer woven on the outer surface of the insulation layer, a wrapping layer wrapped around the outer surface of the silver-plated copper strip braided layer, a silver-plated copper wire braided layer woven on the outer surface of the wrapping layer, an outer sheath extruded on the outer surface of the silver-plated copper wire braided layer, a sealing cylinder symmetrically and slidably connected to the outer surface of the outer sheath, a splitter fixedly connected to one side of the sealing cylinder, and a threaded sleeve fixedly connected to the outer surface of the sealing cylinder. This utility model achieves a certain degree of sealing after installation through the fitting of the sealing frame, and, in conjunction with the subsequent wrapping of waterproof tape, reduces interference from the external environment. The silver-plated copper wire braided layer and the silver-plated copper strip braided layer achieve a good shielding effect, and the excess cable can be wound and fixed by a pull rope to avoid interference caused by dragging or shaking of the cable.

[0005] However, in the above solution, the technology fixes the cable by fitting it with the sealing frame. But this method requires the cable to be the same size as the cable, otherwise it is easy to loosen after long-term use. The technology covers the outside of the wire core with shielding material, but interference can also occur between the wire cores.

[0006] Therefore, we propose a shielded variable frequency power cable. Utility Model Content

[0007] The present invention aims to solve the technical problems existing in the prior art and provide a shielded variable frequency power cable.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a shielded variable frequency power cable, comprising a cable, a connecting component at one end of the cable, the connecting component comprising a threaded tube, a clamping plate arrayed at one end of the threaded tube, an arc-shaped protrusion at the end of the clamping plate, a limiting plate at the midpoint of the threaded tube, a threaded sleeve threadedly connected to the threaded tube on one side of the limiting plate, and a conduit threadedly connected to the threaded tube on the other side of the limiting plate.

[0009] Preferably, the threaded sleeve includes a wire hole on one side, and the side of the threaded sleeve near the wire hole has an arc surface. The threaded sleeve is fitted over the clamping plate and threadedly connected to the threaded pipe.

[0010] Preferably, one end of the conduit has four slots arranged in an array, a fixing plate is provided in the middle of the four slots, two clamps are provided on both sides of the fixing plate, the clamps are fixedly connected to the fixing plate by bolts, the clamps are provided with openings communicating with the slots, and the outside of the conduit is provided with fixing holes corresponding to the bolts.

[0011] Preferably, the cable includes a plurality of cables, which are sleeved around the second anti-interference layer. The cables are covered with a first anti-interference layer, and the first anti-interference layer is covered with a tensile-resistant layer.

[0012] Preferably, the first anti-interference layer is made of aluminum foil Mylar material, and the second anti-interference layer is made of conductive plastic material.

[0013] Preferably, the tensile layer is made of steel strip material.

[0014] This utility model provides a shielded variable frequency power cable, which has the following improvements and advantages compared with the prior art:

[0015] (1) This utility model uses a threaded sleeve clamping plate to fix the cable. A clamping plate is arranged in an array at one end of the threaded tube, and an arc-shaped protrusion is provided at the end of the clamping plate. A limiting plate is provided at the midpoint of the threaded tube. A threaded sleeve threadedly connected to the threaded tube is provided on one side of the limiting plate, and a conduit threadedly connected to the threaded tube is provided on the other side of the limiting plate. The threaded sleeve includes a wire hole on one side, and an arc surface is provided on the side of the threaded sleeve near the wire hole. The threaded sleeve is fitted over the clamping plate and threadedly connected to the threaded tube. Four wire tubes are arranged in an array at one end. The cable tray has a fixing plate in the middle of the four trays. There are two cable clamps on both sides of the fixing plate. The cable clamps are fixed to the fixing plate by bolts. The cable clamps have openings that communicate with the cable trays. By passing the cable through the threaded sleeve and the threaded tube in turn, and rotating the threaded sleeve, the arc-shaped protrusion on the clamp plate retracts inward as it passes the arc surface, pressing it tightly onto the cable for fixation. This can effectively fix the cable. After the cable is stripped, a single cable is passed through the cable tray and then the cable clamp is tightened, so that an interference fit is formed between the cable clamp and the cable, which can effectively fix the single cable.

[0016] (2) This utility model adopts a combination of internal and external shielding. The cable includes several cables. Several cables are wrapped around the second anti-interference layer. The cables are covered with a first anti-interference layer. The first anti-interference layer is covered with a tensile layer. The first anti-interference layer is made of aluminum foil Mylar material. The second anti-interference layer is made of conductive plastic material. The tensile layer is made of steel strip material. By setting the second anti-interference layer of conductive plastic material, the cables are separated, which can reduce the interference between the cables. The first anti-interference layer outside the cable can shield external interference. The tensile layer can enhance the protection effect of the cable. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the cable in this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the connecting component in this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the front end of the conduit in this utility model.

[0022] Legend:

[0023] 10. Cable; 11. Tensile layer; 12. First anti-interference layer; 13. Cable; 14. Second anti-interference layer; 20. Connecting assembly; 21. Threaded sleeve; 22. Wire hole; 23. Curved surface; 24. Threaded tube; 25. Clamping plate; 26. Curved protrusion; 27. Limiting plate; 28. Wire conduit; 29. ​​Fixing hole; 30. Wire groove; 31. Fixing plate; 32. Wire clamp. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings and specific embodiments:

[0025] Example 1

[0026] Please see Figures 1 to 4 Embodiment 1 describes a cable 10. One end of the cable 10 is equipped with a connecting assembly 20, which includes a threaded tube 24 for housing the cable 10 and for threaded connection with other components. One end of the threaded tube 24 is provided with an array of clamping plates 25, which clamp the cable 10 and have a certain deformation capacity. The end of the clamping plate 25 has an arc-shaped protrusion 26, which allows the clamping plate 25 to contract inwards. A limiting plate 27 is provided at the midpoint of the threaded tube 24 to limit the connection and prevent over-connection. A threaded sleeve 21, threadedly connected to the threaded tube 24, is provided on one side of the limiting plate 27, which also allows the clamping plate 25 to contract inwards. On the other side of the limiting plate 27, a conduit 28, threadedly connected to the threaded tube 24, is provided. The conduit 28 protects and secures the cable 13. The sleeve 21 includes a wire hole 22 on one side for the cable 10 to pass through. The threaded sleeve 21 has an arc surface 23 on the side near the wire hole 22. The arc surface 23 and the arc protrusion 26 cooperate to deform the clamping plate 25. The threaded sleeve 21 is fitted over the clamping plate 25 and threadedly connected to the threaded tube 24. One end of the tube 28 has four wire grooves 30 arranged in an array for the cable 13 to pass through. A fixing plate 31 is set in the middle of the four wire grooves 30. Two wire clamps 32 are set on both sides of the fixing plate 31. The wire clamps 32 and the fixing plate 31 cooperate to produce an interference fit for the cable 13. The wire clamps 32 are fixedly connected to the fixing plate 31 by bolts. The bolts are used to fix the wire clamps 32. The wire clamps 32 have openings communicating with the wire grooves 30 to facilitate the passage of the cable 13. The tube 28 has fixing holes 29 corresponding to the bolts on the outside. The fixing holes 29 facilitate the fixing of the bolts.

[0027] In this embodiment, the cable 13 is passed through the threaded sleeve 21 and the threaded tube 24 in sequence. Then, the threaded sleeve 21 is threaded onto the threaded tube 24. During the connection of the threaded sleeve 21, the clamp 25 and the wire hole 22 slowly approach each other until the arc-shaped protrusion 26 contacts the arc surface 23, causing the arc-shaped protrusion 26 to contract inward along the arc surface 23. The arc-shaped protrusion 26 contacts the cable 10, thus completing the fixation of the cable 10. The wire tube 28 is removed, and after the cable 10 is stripped, the cable 13 passes through the wire groove 30. Then, using a screwdriver or other tools, the clamp 32 is inserted into the fixing hole 29 to fix the clamp 32 to the fixing plate 31. After the clamp 32 is fixed, it forms an interference fit with the cable 13, thus fixing the cable 13.

[0028] Example 2

[0029] Please see Figure 1 and Figure 2 Embodiment 2 describes a cable 10 comprising several cables 13. These cables 13 are arranged around a second anti-interference layer 14, which has a pentagonal structure. Each cable 13 is covered by a first anti-interference layer 12, which shields against external interference. The first anti-interference layer 12 is also covered by a tensile layer 11, which enhances the strength of the cable 10. The first anti-interference layer 12 is made of aluminum foil Mylar material, which has good conductivity, antistatic properties, and electromagnetic shielding performance. The second anti-interference layer 14 is made of conductive plastic material, which has advantages such as good shielding effect, strong mechanical flexibility, and high strength. The tensile layer 11 is made of steel strip material, which has high mechanical strength and good tensile strength. Additionally, the cable 10 also contains filler materials, which are existing technologies and will not be described in detail.

[0030] In this embodiment, the cable 13 is sleeved in the second interference layer. The second interference layer has a pentagram-like structure. The second interference layer, made of conductive plastic material, has the advantages of good shielding effect, strong mechanical flexibility, and high strength. The tensile layer 11, made of steel strip material, has the characteristics of high mechanical strength and good tensile effect, which can effectively protect the cable 10.

Claims

1. A shielded power frequency cable (10) comprising a cable (10), characterized by: One end of the cable (10) is provided with a connecting component (20), the connecting component (20) includes a threaded tube (24), one end of the threaded tube (24) is provided with an array of clamps (25), the end of the clamps (25) is provided with an arc-shaped protrusion (26), a limiting plate (27) is provided at the midpoint of the threaded tube (24), one side of the limiting plate (27) is provided with a threaded sleeve (21) that is threadedly connected to the threaded tube (24), and the other side of the limiting plate (27) is provided with a conduit (28) that is threadedly connected to the threaded tube (24).

2. A shielded frequency varying power cable (10) according to claim 1, characterized in that: The threaded sleeve (21) includes a wire hole (22) on one side, and the threaded sleeve (21) has an arc surface (23) on the side near the wire hole (22). The threaded sleeve (21) is sleeved on the outside of the clamping plate (25) and threadedly connected to the threaded tube (24).

3. The shielded variable frequency power cable (10) according to claim 1, characterized in that: The conduit (28) has four wire grooves (30) arranged in an array at one end. A fixing plate (31) is provided in the middle of the four wire grooves (30). Two wire clamps (32) are provided on both sides of the fixing plate (31). The wire clamps (32) are fixedly connected to the fixing plate (31) by bolts. The wire clamps (32) are provided with openings that communicate with the wire grooves (30). The conduit (28) is provided with fixing holes (29) corresponding to the bolts on the outside.

4. A shielded frequency varying power cable (10) according to claim 1, characterized in that: The cable (10) includes a cable (13), and a plurality of the cables (13) are provided. The plurality of the cables (13) are sleeved around the second anti-interference layer (14). The cables (13) are covered with a first anti-interference layer (12), and the first anti-interference layer (12) is covered with a tensile layer (11).

5. A shielded frequency varying power cable (10) according to claim 4, characterized in that: The first anti-interference layer (12) is made of aluminum foil Mylar material, and the second anti-interference layer (14) is made of conductive plastic material.

6. A shielded frequency varying power cable (10) according to claim 4, characterized in that: The tensile layer (11) is made of steel strip material.

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