An oxygen-barrier type mineral flame-retardant cable

Abstract

The present invention discloses an oxygen isolation layer type mineral flame retardant cable, which includes an outer sheath, a metal wire core, a magnesium oxide insulation layer and a mineral filling layer. An outer support sleeve is sleeved on the surface of the outer sheath. The outer support sleeve is provided with a plurality of bending grooves, so that the outer edge of the outer support sleeve is in a plurality of bow-shaped strip structures. A plurality of clamping blocks are fixedly connected to the outer support sleeve, and 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 clamping hook block is rotatably connected between the two rotating support blocks. One end of the clamping hook block is fixedly connected to a rocker. A rigid support is fixedly connected to the surface of the side support plate. An elastic leather cord is arranged between the rigid support and the rocker. The two ends of the elastic leather cord are respectively fixedly connected to the rocker and the rigid support. The oxygen isolation layer type mineral flame retardant cable of the present invention can effectively prevent the cable from rebounding to the original state after the external force is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and specifically to an oxygen-barrier type mineral flame-retardant cable. Background Art

[0002] The oxygen-barrier type mineral flame-retardant cable combines the advantages of oxygen-barrier technology and mineral insulating materials to provide higher safety and reliability. The oxygen-barrier type mineral flame-retardant cable adds a magnesium oxide insulating layer as an oxygen barrier in the cable structure and uses minerals as the insulating material for the flame-retardant cable to achieve higher flame-retardant performance and high-temperature resistance. Due to the use of mineral insulating materials and oxygen-barrier design, the cable can effectively prevent the spread of fire and reduce the fire risk when encountering a fire.

[0003] The oxygen-barrier type mineral flame-retardant cable uses 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 increases the overall hardness of the cable and weakens the flexibility accordingly. Therefore, it may not pose a significant obstacle in a conventional laying environment. However, in the face of variable installation scenarios, such as when the cable needs to pass through wall holes, electrical shafts, and distribution cabinets, etc., the laying requirements for the cable in these areas require flexibility and adaptability to smoothly complete complex operations such as bending and coiling. The high hardness limits the bending radius of the cable, increases the construction difficulty and cost. Even if the cable is reluctantly bent under the action of external forces, due to the elastic recovery ability of the mineral filling material, the cable often has difficulty maintaining the bent shape. Once the external force is removed, it may quickly return to its original state, thus bringing inconvenience to the arrangement, fixing, and subsequent maintenance of the cable. Summary of the Invention

[0004] The purpose of the present invention is to provide an oxygen-barrier type mineral flame-retardant cable to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An oxygen-barrier type mineral flame-retardant cable, including an outer sheath, a metal wire core, a magnesium oxide insulating layer, and a mineral filling layer. An outer support sleeve is sleeved on the surface of the outer sheath. The outer support sleeve is provided with a plurality of bending grooves, so that the outer edge of the outer support sleeve forms a plurality of bow-shaped 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 clamping hook block is rotatably connected between the two rotating support blocks. One end of the clamping hook block is fixedly connected to a rocker. A rigid support is fixedly connected to the surface of the side support plate. An elastic leather cord is arranged between the rigid support and the rocker. The two ends of the elastic leather cord are respectively fixedly connected to the rocker 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. By rotating and moving the connecting outer sleeve on the surface of the connecting inner sleeve, the metal wire core is gradually bent or straightened, thereby adjusting the cable length. This adjustment can be carried out when the cable length does not reach the specified state, avoiding the difficulties in cutting and connecting caused by the relatively hard material characteristics of the oxygen-barrier type mineral flame-retardant cable. Especially when the cable length needs to be quickly adjusted, by adopting the adjustment mechanism of the connecting outer sleeve and the inner sleeve, fine-tuning of the length can be achieved without damaging the overall structure of the cable, thus effectively solving this problem. This adjustment method also has the advantage of simple operation. The operator only needs to complete the cable length adjustment through a simple rotation action, without using complex tools or equipment. At the same time, there is no need to cut the cable during the adjustment process, and it also avoids the potential electrical performance instability or safety hazards caused by reconnection.

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

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

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

[0019] Figure 3 is of the present invention Figure 1 the enlarged view at A in;

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

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

[0022] Figure 6 is of the present invention Figure 5 the enlarged view at B in.

[0023] In the figure: 1. Outer sheath; 2. Metal wire core; 3. Magnesium oxide insulating layer; 4. Mineral filling layer; 501. Outer support sleeve; 502. Clamping block; 503. Rigid support; 504. Hook block; 505. Rocker; 506. Elastic leather cord; 507. Rotating support block; 508. Side support plate; 601. Connecting outer sleeve; 602. Connecting inner sleeve; 603. Resistance ring; 604. Inner support frame; 605. Slideway ring; 606. Sliding connecting ring; 607. Rubber layer; 608. Resistance clamping plate; 609. Resistance frame. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-6 , the present invention provides a technical solution for an oxygen barrier type mineral flame retardant cable:

[0026] According to Figure 1 , Figure 2 and Figure 3 shown, an oxygen barrier type mineral flame retardant cable includes 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 sleeved 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 is in a plurality of arcuate 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 hooks on the clamping block 502 to realize the stable locking of the two, so as to make the cable in a bent state, and the cable can be in a bent state when the external force is removed, which can effectively prevent the cable from rebounding to the original state after the external force is removed;

[0027] One end of the hook block 504 is fixedly connected to a seesaw 505, and a rigid bracket 503 is fixedly connected to the surface of the side support plate 508. An elastic leather cord 506 is arranged between the rigid bracket 503 and the seesaw 505. The elastic leather cord 506 quickly and accurately pulls the hook block 504 to a predetermined position on the block 502 through tension, realizing the stable locking of the two. The two ends of the elastic leather cord 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 at intervals one by one, and are both located on the surfaces of multiple arcuate strip structures on the outer edge of the outer bracket sleeve 501.

[0028] During specific use, an external force is used to forcibly bend the cable. During the bending process of the cable, the outer bracket sleeve 501 will bend along with the cable, causing the block 502 and the side support plate 508 to approach each other. Until the front end of the hook block 504 touches the block 502 and receives sufficient extrusion force, the hook block 504 is squeezed and rotated. At the same time, the pre-tensioned elastic leather cord 506 begins to enter the stretching state and store energy. When the cable is bent to a predetermined angle and the relative position between the hook block 504 and the block 502 reaches the locking point, the elastic leather cord 506 quickly and accurately pulls the hook block 504 to a predetermined position on the block 502 through tension, causing the hook block 504 to hook on the block 502, realizing the stable locking of the two, so as to keep the cable in a bent state.

[0029] According to Figure 4 As shown, a slideway ring 605 is fixedly sleeved at one end of the outer sheath 1. A sliding connection ring 606 is arranged inside the slideway ring 605. An adapter outer sleeve 601 is fixedly connected to the sliding connection ring 606. An adapter inner sleeve 602 is fixedly sleeved at the other end of the outer sheath 1. Thread grooves are provided inside the adapter outer sleeve 601 and outside the adapter inner sleeve 602, and they are adapted to each other, enabling the adapter outer sleeve 601 to rotate and axially move on the surface of the adapter inner sleeve 602, so as to realize the adjustment of the cable length. During the adjustment process, it is not necessary to cut off the cable, and it also avoids the electrical performance instability or safety hazards that may be introduced due to reconnection. 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, affecting the normal use of the cable, at this time, the adapter outer sleeve 601 can be rotated to make the adapter outer sleeve 601 rotate and axially move on the surface of the adapter inner sleeve 602. Since the metal wire core 2 between the two sections of the outer sheath 1 is in a long bent state, the metal wire core 2 can be gradually bent or gradually straightened as the adapter outer sleeve 601 moves, so as to realize the adjustment of the cable length.

[0031] According to Figure 5 andFigure 6 As shown, a resistance ring 603 is arranged inside the connecting outer sleeve 601. By means of the connecting inner sleeve 602, the resistance ring 603 can be pushed to abut against the gap between the connecting inner sleeve 602 and the connecting outer sleeve 601. A rubber layer 607 is arranged on the surface of the resistance ring 603. Through the rubber layer 607, the sealing performance in the cavities of the connecting inner sleeve 602 and the connecting outer sleeve 601 can be increased, protecting key components such as the metal wire core 2, the magnesium oxide insulating layer 3 and the mineral filling layer 4 inside the cable from being damaged. Moreover, 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 forces;

[0032] Among them, a plurality of internal support frames 604 are fixedly connected inside the connecting outer sleeve 601. A plurality of resistance frames 609 are fixedly connected to the inner surface of the resistance ring 603. Resistance clamping plates 608 are fixedly connected to the surface of the internal support frames 604. By means of the friction force between the resistance clamping plates 608 and the resistance frames 609, the resistance can be increased, so as to increase the fitting force between the rubber layer 607 and the gap between the connecting inner sleeve 602 and the connecting outer sleeve 601, and improve the sealing effect. The resistance clamping plates 608 are made of elastic plastic and have a "V"-shaped cross-section. The "V"-shaped resistance clamping plates 608 made of elastic plastic can further increase the friction force between the resistance clamping plates 608 and the resistance frames 609.

[0033] During specific use, as the connecting outer sleeve 601 moves, the connecting inner sleeve 602 moves towards the inside of the connecting outer sleeve 601. Then, the resistance ring 603 can be pushed to move by means of the connecting inner sleeve 602, and the resistance ring 603 abuts against the gap between the connecting inner sleeve 602 and the connecting outer sleeve 601. In this way, the sealing performance in the cavities of the connecting inner sleeve 602 and the connecting outer sleeve 601 can be increased through the rubber layer 607 on the resistance ring 603. When the resistance clamping plates 608 push the resistance ring 603 to move, the resistance can be increased by means of the friction force between the resistance clamping plates 608 and the resistance frames 609, so as to increase the fitting force between the rubber layer 607 and the gap between the connecting inner sleeve 602 and the connecting outer sleeve 601, and improve the sealing effect.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within 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 cord (506) is provided between the rigid bracket (503) and the seesaw (505), and two ends of the elastic leather cord (506) are fixedly connected to the seesaw (505) and the rigid bracket (503) respectively; 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).

2. The oxygen-insulating layer type 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).

3. The oxygen-insulating layer mineral flame-retardant cable according to claim 2, 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.

4. 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).

5. The oxygen-insulating layer type mineral flame-retardant cable according to claim 2, 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).

6. The oxygen-insulating layer type mineral flame-retardant cable according to claim 5, 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).

7. The oxygen-insulating layer type mineral flame-retardant cable according to claim 6, characterized in that: The resistance splint (608) is made of elastic plastic and has a V-shaped cross section.

Images