Mineral insulated fireproof cable

Abstract

The invention relates to the technical field of cables, in particular to a mineral insulation fireproof cable which comprises a cable core, a mineral insulation layer, a fireproof layer and a wear-resistant insulation jacket, the wire lapping method comprises the steps that the mineral insulated fireproof cable penetrates through a guide hole in a bridge wire lapping plate in the cable bridge wire lapping device, the height of the bridge wire lapping plate is adjusted, and the angle of the bridge wire lapping plate is adjusted; wherein the cable bridge wire lapping device comprises an external bottom plate, an angle adjusting rotating rod and a bridge wire lapping plate, the angle adjusting rotating rod is rotatably mounted on the external bottom plate, the bridge wire lapping plate is mounted on the angle adjusting rotating rod, and an angle adjusting assembly connected with the bottom of the angle adjusting rotating rod is arranged on the external bottom plate. According to the invention, insulation and fire prevention of the cable core are realized; according to the cable bridge, the problem that the existing cable bridge cannot orderly distribute cables can be solved, and the problems that the existing cable bridge is mostly fixed, the wire lapping angle cannot be changed at will according to the cable connection direction, and the height cannot be adjusted can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a mineral insulated fireproof cable. Background Art

[0002] The mineral insulation layer of current mineral insulated fire-resistant cables is mostly wrapped with pure mica tape. As the main material of mica tape, mica has low mechanical strength and is easily damaged during processing, which requires the thickness of the insulation layer to be increased to ensure normal use thickness. Although the insulation resistance is enhanced compared to MI cable, mica tape is prone to physical moisture absorption. In order to improve the insulation performance, a baking process needs to be added, and it cannot be guaranteed that the insulation resistance will decrease after baking.

[0003] In addition, cables need to be laid on cable trays, and generally the surface of the trays is sprayed with anti-corrosion paint to enhance the service life of the trays. However, most existing cable trays are fixed, and the laying angle cannot be changed at will according to the cable connection direction, and the height cannot be adjusted, which has the problem of single function. In addition, the existing cable trays cannot distribute cables in an orderly manner, and the cables are in a mess. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a mineral insulated fireproof cable.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] A mineral insulated fireproof cable, comprising a cable core and a mineral insulation layer, a fireproof layer and a wear-resistant insulation jacket coated on the outside of the cable core, wherein the cable core comprises a cable conductor and a conductor protection layer coated on the outside of the cable conductor;

[0007] The wiring method of the mineral insulated fireproof cable is as follows: the cable tray wiring device is fixed on the external part, and the mineral insulated fireproof cable passes through the guide hole on the bridge wiring board in the cable tray wiring device, and it is required to pass through two guide holes in the same axial direction when passing through, and then, according to the use requirements, the height of the bridge wiring board and the angle of the bridge wiring board are adjusted;

[0008] Among them, the cable tray wiring device includes an external base plate, an angle adjustment rod rotatably installed on the external base plate, and a bridge wiring board installed on the angle adjustment rod. The external base plate is provided with an angle adjustment component connected to the bottom of the angle adjustment rod, and the bridge wiring board can be adjusted in height up and down along the angle adjustment rod.

[0009] The beneficial effects of the present invention are:

[0010] The present invention provides a mineral insulated fireproof cable, which achieves insulation and fireproofing of the cable core by means of a mineral insulation layer and a fireproof layer coated on the outside of the cable core, and the wire protection layer located outside the cable conductor further protects the cable conductor; by means of a cable bridge wire jumper and a bridge wire jumper plate with double-layer guide holes, the cable can be stably guided without wearing the cable, and the problem that the existing cable bridge cannot distribute the cables in an orderly manner and the cables are in disorder can be solved; by means of an angle adjustment rotating rod which can adjust both the height and the angle, the problem that the existing cable bridges are mostly fixed, the wire jumper angle cannot be changed arbitrarily according to the cable connection direction, the height cannot be adjusted, and the function is single can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0012] Figure 1 It is a structural schematic diagram of the cable in the present invention;

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the cable tray wiring device in the present invention;

[0014] Figure 3 It is a left side structural schematic diagram of the cable tray wiring device in the present invention;

[0015] Figure 4 for Figure 3 AA cross-sectional structure diagram in;

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure of the angle adjustment rotating rod in the present invention;

[0017] Figure 6 It is a three-dimensional structural schematic diagram of the bridge wiring board in the present invention;

[0018] Figure 7 It is a schematic diagram of the connection structure of the threaded rotating rod, the toothed clamping block and the twisting block in the present invention.

[0019] In the figure: 1. Cable conductor; 2. Conductor protection layer; 3. Mineral insulation layer; 4. Fireproof layer; 5. Wear-resistant insulating jacket; 6. External base plate; 61. External threaded through hole; 7. Angle adjustment rod; 71. Flat step groove; 8. Bridge wiring board; 81. Guide hole; 9. Rotating seat; 10. Turntable; 11. Gear ring; 12. Threaded rotating rod; 13. Gear block; 14. Twisting block; 15. Connecting sleeve; 16. Adjustment hole; 17. Connecting through hole; 18. Bolt; 19. Nut. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, a mineral insulated fireproof cable comprises a cable core and a mineral insulation layer 3, a fireproof layer 4 and a wear-resistant insulating jacket 5 coated on the outside of the cable core. The cable core comprises a cable conductor 1 and a conductor protection layer 2 coated on the outside of the cable conductor 1.

[0022] The wiring method of the mineral insulated fireproof cable is as follows: the cable tray wiring device is fixed on the external part, and the mineral insulated fireproof cable passes through the guide hole 81 on the bridge wiring board 8 in the cable tray wiring device, and it is required to pass through two guide holes 81 in the same axial direction when passing through, and then, according to the use requirements, the height of the bridge wiring board 8 and the angle of the bridge wiring board 8 are adjusted;

[0023] like Figures 2 to 7 As shown, the cable tray wiring device includes an external base plate 6, an angle adjustment rod 7 rotatably mounted on the external base plate 6, and a bridge wiring board 8 mounted on the angle adjustment rod 7. The external base plate 6 is provided with an angle adjustment component connected to the bottom of the angle adjustment rod 7, and the bridge wiring board 8 can be adjusted in height up and down along the angle adjustment rod 7.

[0024] As a further improvement of this embodiment, four external threaded through holes 61 are arranged around the external base plate 6 .

[0025] As a further improvement of this embodiment, a rotating seat 9 is provided on the external base plate 6 , and the lower end of the angle adjustment rotating rod 7 is rotatably connected to the rotating seat 9 .

[0026] As a further improvement of this embodiment, the angle adjustment assembly includes a turntable 10 arranged inside the rotating seat 9 and fixedly connected to the bottom of the angle adjustment rotating rod 7, a gear ring 11 arranged on the upper disk surface of the turntable 10, and a threaded rotating rod 12 arranged on the rotating seat 9, the bottom of the threaded rotating rod 12 is movably connected with a tooth block 13 adapted to the gear ring 11, and the top of the threaded rotating rod 12 is located outside the rotating seat 9 and is connected to a twisting block 14.

[0027] As a further improvement of this embodiment, a planar step groove 71 is provided on the symmetrical side rod wall of the angle adjustment rotating rod 7 , and the planar step groove 71 extends upward to the top end of the angle adjustment rotating rod 7 .

[0028] As a further improvement of the present embodiment, a connecting sleeve plate 15 is provided on one side plate surface of the bridge wiring plate 8 , and the connecting sleeve plate 15 is sleeved on the angle adjustment rotating rod 7 .

[0029] As a further improvement of this embodiment, a plurality of adjustment holes 16 are arranged on the planar step groove 71, which are equidistantly distributed vertically and horizontally penetrate the planar step groove 71. In this embodiment, twelve adjustment holes 16 are arranged.

[0030] In this embodiment, the planar step groove 71, on the one hand, provides vertical guidance for the bridge wiring board 8 when adjusting the height and limits the self-rotation of the bridge wiring board 8 around the angle adjustment rod 7; on the other hand, it facilitates the drilling of the adjustment hole 16.

[0031] As a further improvement of this embodiment, the bridge wiring board 8 and the connecting sleeve plate 15 are provided with a plurality of connecting through holes 17 that match the size of the adjusting hole 16, and bolts 18 are inserted into the connecting through holes 17 and the adjusting hole 16, and nuts 19 are installed on the ends of the bolts 18. In this embodiment, five connecting through holes 17 are provided.

[0032] As a further improvement of this embodiment, the bridge wiring plate 8 is a hollow plate structure.

[0033] As a further improvement of this embodiment, a plurality of guide holes 81 corresponding to the central axis are provided on the two side panels of the bridge wiring board 8. In this embodiment, since the bridge wiring board 8 is a hollow board, twelve guide holes 81 are provided on each of the two side panels of the bridge wiring board 8, and the twelve guide holes 81 on the front and rear side panels correspond to each other.

[0034] When the cable tray wiring device is in use, the cables pass through the front and rear guide holes 81 on the cable tray wiring board 8. When the height needs to be adjusted, first remove the bolt 18, and then move the cable tray wiring board 8 up and down along the angle adjustment rod. After moving to a suitable height, screw on the bolt 18; when the angle needs to be adjusted, rotate the twisting block 14 to rotate the threaded rotating rod 12 and screw it upward to disengage the toothed block 13 at the bottom from the meshing restriction with the gear ring 11, and then rotate the angle adjustment rotating rod 7. After rotating to a suitable angle, rotate the twisting block 14 in the opposite direction to rotate the threaded rotating rod 12 to reset, so that the toothed block 13 can be re-engaged in the gear ring 11.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mineral insulated fire-resistant cable, characterized in that: It comprises a cable core and a mineral insulation layer (3) coated on the outside of the cable core, a fireproof layer (4), and a wear-resistant insulation jacket (5); the cable core comprises a cable conductor (1) and a conductor protection layer (2) coated on the outside of the cable conductor (1); The wiring method of the mineral insulated fireproof cable is as follows: a cable bridge wiring device is fixed on an external component, and the mineral insulated fireproof cable passes through a guide hole (81) on a bridge wiring board (8) in the cable bridge wiring device, and the cable is required to pass through two guide holes (81) in the same axial direction when passing through, and then, according to the use requirements, the height of the bridge wiring board (8) and the angle of the bridge wiring board (8) are adjusted; The cable tray wiring device comprises an external base plate (6), an angle adjustment rod (7) rotatably mounted on the external base plate (6), and a bridge wiring board (8) mounted on the angle adjustment rod (7); an angle adjustment component connected to the bottom of the angle adjustment rod (7) is provided on the external base plate (6); and the bridge wiring board (8) can be adjusted in height up and down along the angle adjustment rod (7).

2. A mineral insulated fire resistant cable according to claim 1, characterized in that: Four external threaded through holes (61) are arranged around the external base plate (6).

3. A mineral insulated fire resistant cable according to claim 1, characterized in that: A rotating seat (9) is provided on the external base plate (6), and the lower end of the angle adjustment rotating rod (7) is rotatably connected to the rotating seat (9).

4. A mineral insulated fire resistant cable according to claim 3, characterized in that: The angle adjustment assembly comprises a turntable (10) arranged inside the rotating seat (9) and fixedly connected to the bottom of the angle adjustment rotating rod (7), a gear ring (11) arranged on the upper disk surface of the turntable (10), and a threaded rotating rod (12) arranged on the rotating seat (9), wherein the bottom of the threaded rotating rod (12) is movably connected to a tooth block (13) adapted to the gear ring (11), and the top of the threaded rotating rod (12) is located outside the rotating seat (9) and is connected to a twisting block (14).

5. A mineral insulated fire resistant cable according to claim 1, characterized in that: A plane step groove (71) is provided on the symmetrical side rod wall on the angle adjustment rotating rod (7), and the plane step groove (71) extends upward to the top end of the angle adjustment rotating rod (7).

6. A mineral insulated fire resistant cable according to claim 5, characterized in that: A connecting sleeve (15) is provided on one side of the bridge wiring board (8), and the connecting sleeve (15) is sleeved on the angle adjustment rotating rod (7).

7. A mineral insulated fire resistant cable according to claim 6, characterized in that: The planar step groove (71) is provided with a plurality of adjustment holes (16) which are equidistantly distributed vertically and horizontally penetrate through the planar step groove (71).

8. A mineral insulated fire resistant cable according to claim 7, characterized in that: The bridge wiring plate (8) and the connecting sleeve plate (15) are provided with a plurality of connecting through holes (17) whose sizes match the adjusting holes (16); bolts (18) are inserted into the connecting through holes (17) and the adjusting holes (16); and nuts (19) are installed on the ends of the bolts (18).

9. A mineral insulated fire resistant cable according to claim 1, characterized in that: The bridge wiring board (8) is a hollow plate structure.

10. A mineral insulated fire resistant cable according to claim 9, characterized in that: A plurality of guide holes (81) corresponding to the central axis are arranged on the two side plate surfaces of the bridge wiring plate (8).

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