Oxygen barrier layer type mineral flame-retardant cable

Abstract

An oxygen barrier layer type mineral flame-retardant cable disclosed by the present invention comprises an outer sheath, a metal wire core, a magnesium oxide insulating layer and a mineral filling layer, the surface of the outer sheath is sleeved with an outer support sleeve, and the outer support sleeve is provided with a plurality of bending grooves, so that the outer side edge of the outer support sleeve is of a plurality of arch strip-shaped structures. A plurality of clamping blocks are fixedly connected to the outer-layer support sleeve, a plurality of side supporting plates are fixedly connected to the outer-layer support sleeve, two rotating supporting blocks are fixedly connected to each side supporting plate, a clamping hook block is rotationally connected between the two rotating supporting blocks, one end of the clamping hook block is fixedly connected with a warping plate, and the other end of the clamping hook block is fixedly connected with a clamping rod. The surface of the side edge supporting plate is fixedly connected with a hard support, an elastic leather rope is arranged between the hard support and the warping plate, and the two ends of the elastic leather rope are fixedly connected with the warping plate and the hard support respectively. The oxygen barrier layer type mineral substance flame-retardant cable can effectively prevent the cable from rebounding to the original state after external force is removed.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to an oxygen-insulating layer type mineral flame-retardant cable. Background Art

[0002] Oxygen-barrier mineral flame-retardant cables combine the advantages of oxygen-barrier technology and mineral insulation materials to provide higher safety and reliability. Oxygen-barrier mineral flame-retardant cables add magnesium oxide insulation as an oxygen-barrier layer to the cable structure, and use minerals as flame-retardant cables with insulation materials to achieve higher flame retardant performance and high temperature resistance. Due to the use of mineral insulation materials and oxygen-barrier design, the cable can effectively prevent the spread of fire and reduce the risk of fire when encountering a fire.

[0003] Oxygen-insulating mineral flame-retardant cables use a mineral filling layer. The introduction of the mineral filling layer significantly enhances the mechanical strength and fire resistance of the cable, but at the same time also increases the overall hardness of the cable and reduces its flexibility accordingly. Therefore, it may not constitute a significant obstacle in conventional laying environments. However, in the face of changing installation scenarios, such as the need to pass through wall holes, electrical shafts, and distribution cabinets, the laying of cables in these areas requires flexibility and adaptability in order to successfully complete complex movements such as bending and coiling. The higher hardness limits the bending radius of the cable, increasing the difficulty and cost of construction. Even if the bending is barely completed under the action of external forces, due to the elastic recovery ability of the mineral filling material, the cable is often difficult to maintain the bent shape. Once the external force is removed, it may quickly return to its original state, which in turn causes inconvenience to the arrangement, fixation, and subsequent maintenance of the cable. Summary of the invention

[0004] The object of the present invention is to provide an oxygen-insulating layer type mineral flame-retardant cable to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an oxygen-insulating layer type mineral flame-retardant cable, comprising an outer sheath, a metal wire core, a magnesium oxide insulation layer and a mineral filling layer, the surface of the outer sheath is provided with an outer support sleeve, the outer support sleeve is provided with a plurality of bending grooves, so that the outer edge of the outer support sleeve presents a plurality of arched strip structures, a plurality of clamping blocks are fixedly connected to the outer support sleeve, a plurality of side support plates are fixedly connected to the outer support sleeve, two rotating support blocks are fixedly connected to the side support plates, a hook block is rotatably connected between the two rotating support blocks, one end of the hook block is fixedly connected to a seesaw, a rigid support is fixedly connected to the surface of the side support plate, an elastic leather rope is arranged between the rigid support and the seesaw, and the two ends of the elastic leather rope are respectively fixedly connected to the seesaw and the rigid support.

[0006] As a preferred technical solution of the present invention, the plurality of the blocking blocks and the plurality of the side support plates are arranged in a one-to-one interval and are all located on the surface of the plurality of arched strip structures on the outer edge of the outer support sleeve.

[0007] As a preferred technical solution of the present invention, a fixed sleeve at one end of the outer sleeve is provided with a slide ring, a sliding connection ring is provided inside the slide ring, a connecting outer sleeve is fixedly connected to the sliding connection ring, and a fixed sleeve at the other end of the outer sleeve is provided with a connecting inner sleeve.

[0008] As a preferred technical solution of the present invention, the inside of the connecting outer sleeve and the outside of the connecting inner sleeve are both provided with thread grooves, and are adapted to each other.

[0009] As a preferred technical solution of the present invention, the multiple sections of the outer sheath, the magnesium oxide insulation layer and the mineral filling layer are connected by a metal wire core.

[0010] As a preferred technical solution of the present invention, a resistance ring is arranged inside the connecting outer sleeve, and a rubber layer is arranged on the surface of the resistance ring.

[0011] As a preferred technical solution of the present invention, the interior of the connecting outer sleeve is fixedly connected with a plurality of internal support frames, the inner surface of the resistance ring is fixedly connected with a plurality of resistance frames, and the surface of the internal support frame is fixedly connected with a resistance splint.

[0012] As a preferred technical solution of the present invention, the resistance splint is made of elastic plastic and has a "V"-shaped cross-section.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention forces the cable to bend by external force, and makes the outer support sleeve bend along with the bending of the cable, so that the cable is bent to a predetermined angle and the relative position between the hook block and the card block reaches the locking point. The firm locking of the two can keep the cable in a bent state when the external force is removed, and can effectively prevent the cable from rebounding to its original state after the external force is removed, and can also significantly improve the structural stability and durability of the cable bending part. When the cable needs to be repaired, replaced or adjusted, the hook block and the card block can be easily separated by a simple unlocking operation, so that the cable can be conveniently moved or rearranged, which not only reduces the maintenance cost and time, but also improves the flexibility and scalability of the entire cable system.

[0015] 2. The present invention achieves adjustment of cable length by rotating and moving the connecting outer sleeve on the surface of the connecting inner sleeve so that the metal wire core is gradually bent or straightened. The cable length can be adjusted when it does not reach the specified state, avoiding the difficulty in cutting and connecting caused by the harder material characteristics of the oxygen-insulating mineral flame-retardant cable. Especially when the cable length needs to be adjusted quickly, the adjustment mechanism of the connecting outer sleeve and the inner sleeve can be used to fine-tune the length without destroying the overall structure of the cable, thereby effectively solving this problem. The adjustment method also has the advantage of easy operation. The operator only needs to adjust the cable length through a simple rotation action without using complicated tools or equipment. At the same time, there is no need to cut the cable during the adjustment process, which also avoids electrical performance instability or safety hazards that may be introduced due to reconnection.

[0016] 3. The resistance ring of the present invention is arranged in front of the gap between the inner sleeve and the outer sleeve. When the resistance ring is tightly pressed on the gap, the rubber layer can fill and seal any tiny gaps or holes due to its excellent elasticity and compression recovery, thereby effectively preventing harmful substances such as moisture, dust, corrosive gases or liquids in the external environment from invading the interior of the cable, protecting key components such as the metal core, magnesium oxide insulation layer and mineral filling layer inside the cable from damage, and the rubber layer also has good friction properties, which can ensure that the resistance ring can maintain a stable position when subjected to external force, without slipping or falling off, thereby maintaining a long-term sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the cable part of the present invention;

[0019] Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle;

[0020] Figure 4 It is a schematic diagram of the structure of the present invention connecting the outer sleeve and the inner sleeve;

[0021] Figure 5 It is a structural schematic diagram of the resistance ring of the present invention;

[0022] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle.

[0023] In the figure: 1, outer sheath; 2, metal wire core; 3, magnesium oxide insulation layer; 4, mineral filling layer; 501, outer support sleeve; 502, block; 503, rigid support; 504, hook block; 505, seesaw; 506, elastic leather rope; 507, rotating support block; 508, side support plate; 601, connecting outer sleeve; 602, connecting inner sleeve; 603, resistance ring; 604, internal support frame; 605, slide ring; 606, sliding connection ring; 607, rubber layer; 608, resistance splint; 609, resistance frame. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-6 The present invention provides a technical solution for an oxygen-insulating layer type mineral flame-retardant cable:

[0026] according to Figure 1 , Figure 2 and Figure 3 As shown, an oxygen-insulating mineral flame-retardant cable comprises an outer sheath 1, a metal wire core 2, a magnesium oxide insulating layer 3 and a mineral filling layer 4. An outer support sleeve 501 is provided on the surface of the outer sheath 1. The outer support sleeve 501 is provided with a plurality of bending grooves, so that the outer edge of the outer support sleeve 501 presents a plurality of arched strip structures. A plurality of clamping blocks 502 are fixedly connected to the outer support sleeve 501. A plurality of side support plates 508 are fixedly connected to the outer support sleeve 501. Two rotating support blocks 507 are fixedly connected to the side support plates 508. A hook block 504 is rotatably connected between the two rotating support blocks 507, so that the hook block 504 is hooked on the clamping block 502 to achieve a stable locking of the two, so that the cable is in a bent state. When the external force is removed, the cable can be in a bent state, which can effectively prevent the cable from rebounding to the original state after the external force is removed.

[0027] Among them, one end of the hook block 504 is fixedly connected to the seesaw 505, and the surface of the side support plate 508 is fixedly connected to the rigid bracket 503. An elastic leather rope 506 is arranged between the rigid bracket 503 and the seesaw 505. The elastic leather rope 506 quickly and accurately pulls the hook block 504 to a predetermined position on the block 502 through tension, thereby achieving a stable locking of the two. The two ends of the elastic leather rope 506 are respectively fixedly connected to the seesaw 505 and the rigid bracket 503. Multiple blocks 502 and multiple side support plates 508 are arranged in a one-to-one interval, and are all located on the surface of multiple arched strip structures on the outer edge of the outer bracket sleeve 501.

[0028] During specific use, the cable is forced to bend through external force, and during the bending process of the cable, the outer support sleeve 501 will bend with the bending of the cable, so that the clamping block 502 and the side support plate 508 are close to each other, until the front end of the hook block 504 touches the clamping block 502 and is subjected to sufficient squeezing force, so that the hook block 504 is squeezed and rotated, and at the same time, the pre-tensioned elastic leather rope 506 begins to enter a stretched state to store energy. When the cable is bent to a predetermined angle and the relative position between the hook block 504 and the clamping block 502 reaches the locking point, the elastic leather rope 506 uses tension to quickly and accurately pull the hook block 504 to the predetermined position on the clamping block 502, so that the hook block 504 is hooked on the clamping block 502, and the two are firmly locked, thereby putting the cable in a bent state.

[0029] according to Figure 4 As shown, a fixed sleeve at one end of the outer sheath 1 is provided with a slide ring 605, a sliding connection ring 606 is provided inside the slide ring 605, and a connecting outer sleeve 601 is fixedly connected to the sliding connection ring 606, and a fixed sleeve at the other end of the outer sheath 1 is provided with a connecting inner sleeve 602, and thread grooves are provided inside the connecting outer sleeve 601 and outside the connecting inner sleeve 602, and are adapted to each other, so that the connecting outer sleeve 601 can rotate and axially move on the surface of the connecting inner sleeve 602, so that the cable length can be adjusted, and the cable does not need to be cut off during the adjustment process, and the electrical performance instability or safety hazards that may be introduced due to reconnection are avoided. The multiple sections of the outer sheath 1, the magnesium oxide insulation layer 3 and the mineral filling layer 4 are connected by the metal wire core 2.

[0030] During specific use, if the length of the cable is different from the predetermined length, which affects the normal use of the cable, the connecting outer sleeve 601 can be rotated to make the connecting outer sleeve 601 rotate and move axially on the surface of the connecting inner sleeve 602. Since the metal wire core 2 between the two sections of the outer sheath 1 is in a long curved state, the metal wire core 2 can be gradually bent or straightened as the connecting outer sleeve 601 moves, thereby realizing the adjustment of the cable length.

[0031] according to Figure 5 and Figure 6 As shown, a resistance ring 603 is arranged inside the connecting outer sleeve 601, and the resistance ring 603 can be pushed against the gap between the connecting inner sleeve 602 and the connecting outer sleeve 601 by connecting the inner sleeve 602, and a rubber layer 607 is arranged on the surface of the resistance ring 603, and the rubber layer 607 can increase the sealing performance in the cavity between the connecting inner sleeve 602 and the connecting outer sleeve 601, and protect the key components such as the metal wire core 2, the magnesium oxide insulation layer 3 and the mineral filling layer 4 inside the cable from damage, and the rubber layer 607 also has good friction performance, which can ensure that the resistance ring 603 can still maintain a stable position when subjected to external force;

[0032] Among them, the inside of the connecting outer sleeve 601 is fixedly connected with multiple internal support frames 604, the inner surface of the resistance ring 603 is fixedly connected with multiple resistance frames 609, and the surface of the internal support frame 604 is fixedly connected with a resistance splint 608. The resistance is increased by the friction between the resistance splint 608 and the resistance frame 609, which can increase the fit strength between the rubber layer 607 and the gap between the connecting inner sleeve 602 and the connecting outer sleeve 601, thereby increasing the sealing effect. The resistance splint 608 is elastic plastic and has a "V"-shaped cross-section. The "V"-shaped resistance splint 608 made of elastic plastic can further increase the friction between the resistance splint 608 and the resistance frame 609.

[0033] During specific use, as the connecting outer layer sleeve 601 moves, the connecting inner layer sleeve 602 moves toward the inside of the connecting outer layer sleeve 601, and the connecting inner layer sleeve 602 can be used to push the resistance ring 603 to move, and the resistance ring 603 is pressed against the gap between the connecting inner layer sleeve 602 and the connecting outer layer sleeve 601, so as to increase the sealing performance in the cavity of the connecting inner layer sleeve 602 and the connecting outer layer sleeve 601 through the rubber layer 607 on the resistance ring 603. When the resistance splint 608 pushes the resistance ring 603 to move, the friction force between the resistance splint 608 and the resistance frame 609 is used to increase the resistance, so as to increase the fitting strength of the rubber layer 607 and the gap between the connecting inner layer sleeve 602 and the connecting outer layer sleeve 601, thereby increasing the sealing effect.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oxygen-insulating layer type mineral flame-retardant cable, comprising an outer sheath (1), a metal core (2), a magnesium oxide insulation layer (3) and a mineral filling layer (4), characterized in that: The surface of the outer layer sheath (1) is provided with an outer layer support sleeve (501), and the outer layer support sleeve (501) is provided with a plurality of bending grooves, so that the outer edge of the outer layer support sleeve (501) presents a plurality of arched strip structures, and the outer layer support sleeve (501) is fixedly connected with a plurality of clamping blocks (502), and the outer layer support sleeve (501) is fixedly connected with a plurality of side support plates (508), and the side support plates (508) are fixedly connected with two rotating support blocks (507). A hook block (504) is rotatably connected between the two rotating support blocks (507), one end of the hook block (504) is fixedly connected to a seesaw (505), a rigid bracket (503) is fixedly connected to the surface of the side support plate (508), an elastic leather rope (506) is arranged between the rigid bracket (503) and the seesaw (505), and two ends of the elastic leather rope (506) are fixedly connected to the seesaw (505) and the rigid bracket (503) respectively.

2. The oxygen-insulating layer type mineral flame-retardant cable according to claim 1, characterized in that: The plurality of clamping blocks (502) and the plurality of side support plates (508) are arranged in a one-to-one interval pattern and are all located on the surface of the plurality of arched strip structures at the outer edge of the outer support sleeve (501).

3. The oxygen-insulating layer mineral flame-retardant cable according to claim 1, characterized in that: A slide ring (605) is fixedly provided at one end of the outer layer sheath (1), a sliding connection ring (606) is provided inside the slide ring (605), a connecting outer layer sheath (601) is fixedly connected to the sliding connection ring (606), and a connecting inner layer sheath (602) is fixedly provided at the other end of the outer layer sheath (1).

4. The oxygen-insulating layer type mineral flame-retardant cable according to claim 3, characterized in that: The inside of the connecting outer sleeve (601) and the outside of the connecting inner sleeve (602) are both provided with thread grooves, and are adapted to each other.

5. The oxygen-insulating layer type mineral flame-retardant cable according to claim 1, characterized in that: The multiple sections of the outer sheath (1), the magnesium oxide insulation layer (3) and the mineral filling layer (4) are connected via a metal wire core (2).

6. The oxygen-insulating layer type mineral flame-retardant cable according to claim 3, characterized in that: A resistance ring (603) is arranged inside the connecting outer sleeve (601), and a rubber layer (607) is arranged on the surface of the resistance ring (603).

7. The oxygen-insulating layer type mineral flame-retardant cable according to claim 6, characterized in that: The interior of the connecting outer sleeve (601) is fixedly connected with a plurality of internal support frames (604), the inner surface of the resistance ring (603) is fixedly connected with a plurality of resistance frames (609), and the surface of the internal support frame (604) is fixedly connected with a resistance splint (608).

8. The oxygen-insulating layer type mineral flame-retardant cable according to claim 7, characterized in that: The resistance splint (608) is made of elastic plastic and has a V-shaped cross section.

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