Alternating-current single-core cable three-phase delta-shaped fixed installation device

Abstract

The utility model discloses a three-phase triangular fixed installation device for an AC single-core cable, and relates to the technical field of cable installation. Comprising a first arc-shaped supporting piece, a second arc-shaped supporting piece and a horizontal supporting piece. The inner diameters of the first arc-shaped supporting piece and the second arc-shaped supporting piece are both larger than the outer diameter of the alternating-current single-core cable; the two first arc-shaped supporting pieces are connected in a back-to-back mode, and openings of the two first arc-shaped supporting pieces face the two horizontally-opposite directions respectively. The bottom ends of the two first arc-shaped supporting pieces are each connected with one horizontal supporting piece, an opening of the second arc-shaped supporting piece faces upwards, and the bottom of the second arc-shaped supporting piece is connected with the outer walls of the two first arc-shaped supporting pieces. The two first arc-shaped supporting pieces and the two second arc-shaped supporting pieces are each connected with a flame-retardant binding belt. The device adopts semi-surrounding protection, so that heat dissipation of the cable is facilitated; and the eddy current phenomenon generated when magnetic materials are adopted can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cable installation, in particular to a three-phase triangular-shaped fixing and installing device for an AC single-core cable. Background Art

[0002] There is an electromagnetic field around AC single-core cables. During the project, the laying of AC single-core cables needs to suppress the eddy current and hysteresis losses around them to avoid additional losses in the transmission lines, damage to the cables due to excessive temperature, increased vibration and heating of the equipment, and interference with the operation of other equipment. Figure 1 and Figure 2 As shown in the figure, there are two types of arrangement in AC single-core cable projects: a herringbone arrangement and a horizontal arrangement. The herringbone arrangement has obvious advantages in reducing the mutual influence between different circuits, reducing the induced potential of the cable metal sheath, and suppressing the interference of the induced potential on the communication signal.

[0003] At present, the fixed installation devices for AC single-core cables include single-phase fixing fixtures and three-phase fixing fixtures. The single-phase fixing fixture is that each single-phase cable is fixed in one fixture, and the three-phase fixing fixture is that three single-core cables are fixed in one fixture.

[0004] Defects and shortcomings of the existing technology:

[0005] 1. Single-phase fixing fixtures are made of non-magnetic materials. If non-magnetic metal materials such as aluminum alloy are used, the cost is high; if organic materials such as nylon plastic and polyvinyl chloride are used, the mechanical strength is not high and the durability is poor. If a herringbone arrangement is used, two layers of cable brackets are required.

[0006] 2. When the three-phase fixing fixture is arranged in a triangle shape, the cables are arranged closely together and fixed in a cable fixture. There is no distance between the cables, which affects the heat dissipation of the cables, thereby reducing the current carrying capacity of the cables. It is difficult to ensure that the cables are arranged completely in an equilateral triangle, and the lower cables will bear the weight of the upper cables for a long time. Utility Model Content

[0007] The utility model overcomes the shortcomings of the prior art and provides a three-phase triangular-shaped fixing and installing device for an AC single-core cable.

[0008] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions.

[0009] A three-phase herringbone fixing and installation device for an AC single-core cable comprises a first arc-shaped support member, a second arc-shaped support member, a horizontal support member, and a flame-retardant binding belt; the inner diameters of the first arc-shaped support member and the second arc-shaped support member are both larger than the outer diameter of the AC single-core cable; the two first arc-shaped support members are connected back to back so that the openings of the two first arc-shaped support members face two horizontally opposite directions respectively; the bottom ends of the two first arc-shaped support members are respectively connected to a horizontal support member, the opening of the second arc-shaped support member faces upward, and the bottom of the second arc-shaped support member is connected to the outer walls of the two first arc-shaped support members; the two first arc-shaped support members and the second arc-shaped support members are respectively connected to a flame-retardant binding belt.

[0010] Furthermore, the two horizontal support members are on a horizontal line; and the center line of the second arc-shaped support member is perpendicular to the horizontal line.

[0011] Furthermore, a fixing hole is provided on the horizontal support member; the connecting bolt in the fixing hole is used for fixing with the cable bracket.

[0012] Furthermore, the width of the first arc-shaped support member is equal to the width of the cable support and is ≥40 mm.

[0013] Furthermore, a through hole is respectively opened on both sides of the connection point of the first arc-shaped support member and the horizontal support member, and a through hole is respectively opened on both sides of the vertical center of the second arc-shaped support member, and the flame-retardant binding belt passes through two adjacent through holes.

[0014] Furthermore, the distance between two adjacent perforations is 100 mm, and the aperture of the perforations is φ10.

[0015] Furthermore, the second arc-shaped support member has the same inner diameter, thickness, and width as the first arc-shaped support member.

[0016] Furthermore, the first arc-shaped support member is a steel tube wall with an arc length of 180°, and the second arc-shaped support member is a steel tube wall with an arc length of 120°.

[0017] Furthermore, the length of the flame retardant binding tape is greater than 6d, where d represents the inner diameter of the steel pipe wall.

[0018] The beneficial effects of the utility model compared with the prior art are:

[0019] 1. The utility model is suitable for the use of AC single-core cables arranged in a triangular shape. The three-phase and single-phase cables of the utility model are fixed in a triangular fixing installation device, which can ensure that the center distance of the cables is arranged in an equilateral triangle. Using this device, the cables are semi-enclosed for protection, so that a certain distance is left between the cables, which is conducive to the heat dissipation of the cables.

[0020] 2. Based on a full analysis of the principles of eddy current and hysteresis loss around single-core cables, the device adopts an open-loop design to avoid eddy current when using magnetic materials.

[0021] 3. The single-core cable is firmly tied to the device with a flame-retardant binding belt, and then fixed to the cable bracket with galvanized bolts. The whole structure is simple, easy to fix the single-core cable, and convenient to operate. The device is made of hot-dip galvanized steel material, which is easy to process, low in cost, simple in structure, and feasible in engineering and can be promoted and applied.

[0022] 4. The three-phase AC single-core cable T-shaped fixing and installation device proposed by the utility model overcomes the problem that the existing AC single-phase fixing fixture can only be made of non-magnetic materials and needs to occupy two layers of cable brackets when arranged in a T-shape; it also overcomes the problem that the lower layer cable is subjected to stress for a long time and affects the heat dissipation of the cable when the three-phase fixing fixture is arranged in a T-shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-phase T-shaped arrangement of an AC single-core cable;

[0024] Figure 2 This is a schematic diagram of the horizontal arrangement of three phases of AC single-core cable;

[0025] Figure 3 It is a structural schematic diagram of the three-phase triangular-shaped fixing and installation device for AC single-core cables according to the utility model;

[0026] Figure 4 A schematic diagram of the processing of connecting the first arc-shaped support member and the horizontal support member;

[0027] Figure 5 is a schematic diagram of processing of the second arc-shaped support member;

[0028] Figure 6 This is a schematic diagram of the three-phase triangle-shaped fixed installation of the utility model;

[0029] In the figure:

[0030] 1-first arc-shaped support member; 2-second arc-shaped support member; 3-horizontal support member; 4-flame-retardant binding belt; 5-AC single-core cable; 6-cable bracket; 7-fixing hole; 8-through hole. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0032] like Figure 3-6 As shown, this embodiment provides a three-phase herringbone fixed installation device for an AC single-core cable, comprising a first arc-shaped support member 1, a second arc-shaped support member 2, a horizontal support member 3, and a flame-retardant binding belt 4.

[0033] Material selection parts: The first arc support 1 and the second arc support 2 are both made of hot-dip galvanized steel pipe with an inner diameter slightly larger than the outer diameter of the AC single-core cable 5, and the wall thickness of the steel pipe is required to be no less than 5mm; the horizontal support 3 is made of hot-dip galvanized flat steel, its width is consistent with the cable bracket 6, and its thickness should be consistent with the wall thickness of the first arc support 1; the length of the flame retardant binding belt 4 should be greater than 6d (d represents the inner diameter of the steel pipe) to ensure that the cable can be firmly tied.

[0034] AC single-core cable three-phase herringbone fixed installation device Figure 3 A set of AC single-core cable three-phase herringbone fixing and installation device requires two first arc-shaped supports 1, one second arc-shaped support 2, two horizontal supports 3, three flame-retardant binding belts 4, and matching galvanized bolts.

[0035] The first arc support member 1 is a steel pipe wall with an arc length of 180°, the second arc support member 2 is a steel pipe wall with an arc length of 120°, the horizontal support member 3 is a hot-dip galvanized flat steel with a length of 0.6d (d represents the inner diameter of the steel pipe), and the length of the flame-retardant binding belt 4 is about 6d.

[0036] A horizontal support member 3 is arc welded at the bottom end of the first arc support member 1, and the two first arc support members 1 are welded together back to back symmetrically, so that the openings of the two first arc support members 1 face two horizontally opposite directions respectively; the opening of the second arc support member 2 faces upward, and the bottom is arc welded to the outer walls of the two first arc support members 1. During the welding process, the two horizontal support members 3 should be ensured to be in a horizontal line; the center line of the second arc support member 2 is perpendicular to the horizontal line.

[0037] Welding requirements for the first arc-shaped support member 1 and the horizontal support member 3:

[0038] 1) The width of the first arc-shaped support member 1 should be consistent with the width of the cable support 6 and should not be less than 40 mm;

[0039] 2) Welding the horizontal support member 3 in the tangent direction of the steel pipe wall of the 180° arc length of the first arc-shaped support member 1;

[0040] 3) A φ10 fixing hole 7 is opened on the horizontal support member 3 at a distance of 0.5d from the welding point; the connecting bolts in the fixing hole 7 are used to fix with the cable bracket 6;

[0041] 4) A through hole 8 is respectively formed on the first arc-shaped support member 1 and the horizontal support member 3. The two through holes 8 are 50 mm away from the welding point with the welding point as the center, and the aperture of the through hole 8 is φ10.

[0042] The second arc-shaped support member 2 production requirements:

[0043] 1) The second arc-shaped support member 2 is made of a steel pipe wall having the same inner diameter, thickness and width as the first arc-shaped support member 1.

[0044] 2) Two φ10 through holes 8 are opened at 50 mm on both sides of the center of the steel pipe wall of the second arc-shaped support member 2 with an arc length of 120°.

[0045] The flame retardant binding belt 4 passes through two adjacent through holes 8 .

[0046] Figure 6 The schematic diagram of the three-phase zigzag fixing installation of AC single-core cable using the device is shown in FIG. The AC single-core cable 5 is tied and fixed in the device with a flame-retardant binding belt 4; the device is fixed and installed on the cable bracket 6 with hot-dip galvanized bolts.

[0047] Precautions for making the three-phase triangle-shaped fixed installation device for AC single-core cable:

[0048] 1. The edges of each part should be free of burrs, sharp corners and other defects;

[0049] 2. Use flame retardant binding tape;

[0050] 3. When hot-dip galvanized steel is welded, reliable anti-corrosion treatment should be adopted within the minimum range of 100mm outside the weld mark. Before anti-corrosion treatment, the surface should be derusted and the residual flux at the welding point should be removed.

[0051] The above content is a further detailed description of the utility model in combination with a specific preferred implementation method. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the utility model, which should be regarded as belonging to the utility model and the scope of patent protection determined by the submitted claims.

Claims

1. A three-phase zigzag fixing and installation device for a single-core AC cable, characterized in that: The invention comprises a first arc-shaped support member (1), a second arc-shaped support member (2), a horizontal support member (3), and a flame-retardant binding belt (4); the inner diameters of the first arc-shaped support member (1) and the second arc-shaped support member (2) are both larger than the outer diameter of the AC single-core cable (5); the two first arc-shaped support members (1) are connected back to back, so that the openings of the two first arc-shaped support members (1) are respectively oriented in two horizontally opposite directions; the bottom ends of the two first arc-shaped support members (1) are respectively connected to a horizontal support member (3), the opening of the second arc-shaped support member (2) is oriented upward, and the bottom of the second arc-shaped support member (2) is connected to the outer walls of the two first arc-shaped support members (1); and the two first arc-shaped support members (1) and the second arc-shaped support member (2) are respectively connected to a flame-retardant binding belt (4).

2. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 1 is characterized in that: The two horizontal support members (3) are on a horizontal line; and the center line of the second arc-shaped support member (2) is perpendicular to the horizontal line.

3. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 1, characterized in that: A fixing hole (7) is provided on the horizontal support member (3); a connecting bolt in the fixing hole (7) is used for fixing to the cable bracket (6).

4. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 3 is characterized in that: The width of the first arc-shaped support member (1) is equal to the width of the cable support (6) and is ≥40 mm.

5. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 1, characterized in that: A through hole (8) is respectively provided on both sides of the connection point between the first arc-shaped support member (1) and the horizontal support member (3), and a through hole (8) is respectively provided on both sides of the vertical center of the second arc-shaped support member (2), and the flame-retardant binding belt (4) passes through two adjacent through holes (8).

6. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 5, characterized in that: The distance between two adjacent through holes (8) is 100 mm, and the aperture of the through hole (8) is φ10.

7. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 1, characterized in that: The second arc-shaped support member (2) has the same inner diameter, thickness and width as the first arc-shaped support member (1).

8. The three-phase zigzag fixing and installation device for a single-core AC cable according to claim 7, characterized in that: The first arc-shaped support member (1) is a steel tube wall with an arc length of 180°, and the second arc-shaped support member (2) is a steel tube wall with an arc length of 120°.

9. The three-phase zigzag fixing and installation device for AC single-core cables according to claim 8, characterized in that: The length of the flame retardant binding tape (4) is greater than 6d, where d represents the inner diameter of the steel pipe wall.

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