Fireproof cable with flexible protective layer

Abstract

The utility model discloses a flexible protection layer fireproof cable, which comprises a sheath, a flexible protection layer, a polyvinyl chloride filling layer, control wire cores, an inner sheath, a central wire core and a connecting sheath, the flexible protection layer is fixedly connected below the sheath, the polyvinyl chloride filling layer is fixedly connected inside the flexible protection layer, and the central wire core is fixedly connected inside the inner sheath. The three control wire cores are fixedly connected inside the polyvinyl chloride filling layer at equal intervals, the central wire core is fixedly connected to the center of the polyvinyl chloride filling layer, the inner sheath is fixedly connected to the outer side of the central wire core, and the connecting sheath is fixedly connected to the outer side of the outer sheath. And an independent connecting sheath structure is additionally arranged at the joint, so that the stability of the cable after connection is improved, and the normal transmission of the cable is ensured.

Description

Technical Field

[0001] The utility model relates to a fireproof cable with a flexible protective layer. Background Art

[0002] Fire-resistant cable is a cable with fire-resistant properties. It is designed and manufactured to maintain the basic functions of the cable in the event of a fire, slow down the spread of fire, and reduce the losses caused by the fire.

[0003] The flexible protective layer fire-resistant cables currently used generally adopt a variety of winding methods when connecting. If they are pulled after the connection is completed, they may become loose, affecting the cable transmission. Utility Model Content

[0004] The utility model aims to provide a fireproof cable with a flexible protective layer to solve the above technical problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A flexible protective layer fireproof cable comprises an outer skin, a flexible protective layer, a polyvinyl chloride filling layer, a control wire core, an inner sheath, a center wire core, and a connecting sheath. The flexible protective layer is fixedly connected below the outer skin, the polyvinyl chloride filling layer is fixedly connected inside the flexible protective layer, three control wire cores are fixedly connected inside the polyvinyl chloride filling layer at equal distances, the center wire core is fixedly connected at the center of the polyvinyl chloride filling layer, the inner sheath is fixedly connected to the outside of the center wire core, and the connecting sheath is fixedly connected to the outside of the outer skin.

[0007] Based on the above technical solution, the connecting sleeve includes a fixed end, an extended rubber ring, a linkage structure, an anti-slip groove, and a tightening steel wire. The fixed end is slidingly connected to the extended rubber ring through the linkage structure, the anti-slip groove is opened inside the extended rubber ring, and the tightening steel wire is wrapped around the extended rubber ring.

[0008] Based on the above technical solution, the linkage structure includes a composite rubber tendon, a connecting ring, and a retaining plate. The four composite rubber tendons are fixedly connected to the back of the extended rubber ring in groups of two, and slide through the fixed end, and are fixedly connected to the retaining plate using a connecting ring fixedly connected to the tail of the composite rubber tendon.

[0009] Compared with the prior art, the utility model has the following advantages: the utility model improves the existing design structure of the flexible protective layer fireproof cable, adds an independent connection sheath structure at the connection, improves the stability of the cable after connection, and ensures the normal transmission of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the appearance structure of the utility model.

[0011] Figure 2 This is a schematic diagram of the connecting sheath structure of the utility model.

[0012] Figure 3 It is a schematic diagram of the linkage structure of the utility model.

[0013] In the figure: 1. Outer skin, 2. Flexible protective layer, 3. PVC filling layer, 4. Control wire core, 5. Inner sheath, 6. Center wire core, 7. Connecting sheath, 8. Fixed end, 9. Extension rubber ring, 10. Linkage structure, 11. Anti-slip groove, 12. Tightening steel wire, 13. Composite rubber tendon, 14. Connecting ring, 15. Positioning plate. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1-3 As shown, a flexible protective layer fireproof cable comprises an outer skin 1, a flexible protective layer 2, a polyvinyl chloride filling layer 3, a control core 4, an inner sheath 5, a center core 6, and a connecting sheath 7. The flexible protective layer 2 is fixedly connected below the outer skin 1, the polyvinyl chloride filling layer 3 is fixedly connected inside the flexible protective layer 2, three control cores 4 are fixedly connected inside the polyvinyl chloride filling layer 3 at equal distances, the center core 6 is fixedly connected at the center of the polyvinyl chloride filling layer 3, the inner sheath 5 is fixedly connected to the outside of the center core 6, and the connecting sheath 7 is fixedly connected to the outside of the outer skin 1.

[0016] The connecting sheath 7 includes a fixed end 8, an extended rubber ring 9, a linkage structure 10, an anti-skid groove 11, and a tightening steel wire 12. The fixed end 8 is slidably connected to the extended rubber ring 9 through the linkage structure 10. The anti-skid groove 11 is opened inside the extended rubber ring 9, and the tightening steel wire 12 is surrounded by the extended rubber ring 9.

[0017] The linkage structure 10 includes a composite rubber tendon 13, a connecting ring 14, and a retaining plate 15. Four composite rubber tendons 13 are fixedly connected to the back of the extension rubber ring 9 in groups of two, and slide through the fixed end 8, and are fixedly connected to the retaining plate 15 by the connecting ring 14 fixedly connected to the tail of the composite rubber tendon.

[0018] The working principle of the utility model is as follows: after the cable is wound and connected, the extension rubber ring is slid to the outside of the cable connected to the other end, and the clamping plate at the tail of the composite rubber band is ensured to be clamped at the tail of the fixed end, and the tightening steel wire is tightened to make the extension rubber ring bite the outside of the cable at the other end. In this way, when encountering pulling, the pulling force can be shared by the connecting sheath, reducing or avoiding pulling on the cable connection, thereby achieving the protection purpose of the device.

[0019] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A flexible protective layer fireproof cable, comprising an outer sheath (1), a flexible protective layer (2), a polyvinyl chloride filling layer (3), a control core (4), an inner sheath (5), a center core (6), and a connecting sheath (7), characterized in that: A flexible protective layer (2) is fixedly connected below the outer skin (1), the polyvinyl chloride filling layer (3) is fixedly connected inside the flexible protective layer (2), the three control wire cores (4) are fixedly connected inside the polyvinyl chloride filling layer (3) at equal distances, the center wire core (6) is fixedly connected at the center of the polyvinyl chloride filling layer (3), the inner sheath (5) is fixedly connected to the outside of the center wire core (6), and the connecting sheath (7) is fixedly connected to the outside of the outer skin (1).

2. A fireproof cable with a flexible protective layer according to claim 1, characterized in that: The connecting sheath (7) comprises a fixed end (8), an extension rubber ring (9), a linkage structure (10), an anti-slip groove (11), and a tightening steel wire (12); the fixed end (8) is slidably connected to the extension rubber ring (9) via the linkage structure (10); the anti-slip groove (11) is provided inside the extension rubber ring (9); and the tightening steel wire (12) surrounds the extension rubber ring (9).

3. A fireproof cable with a flexible protective layer according to claim 2, characterized in that: The linkage structure (10) comprises a composite rubber tendon (13), a connecting ring (14), and a retaining plate (15). Four composite rubber tendons (13) are fixedly connected to the back of the extension rubber ring (9) in groups of two, and slide through the fixed end (8) to be fixedly connected to the retaining plate (15) by means of the connecting ring (14) fixedly connected to the rear end of the composite rubber tendon.

Images