Fireproof and anti-interference low-voltage power cable

Abstract

The application discloses a fireproof anti-interference low-voltage power cable and relates to the technical field of low-voltage cables. Arc-shaped positioning grooves are equidistantly arranged on the bottom of the surface of an outer protective layer, arc-shaped positioning strips are equidistantly attached to the bottom of the outer protective layer, support protrusions are symmetrically and fixedly connected to the two ends of the arc-shaped positioning strips, arc-shaped mounting grooves are arranged on the bottom of the support protrusions, limit rubber protrusions are symmetrically and fixedly connected to the two ends of the bottom of the arc-shaped mounting grooves, and side support steel wires are arranged to penetrate through the arc-shaped mounting grooves. The arc-shaped positioning strips are positioned and mounted by the cooperation of the spliced clamping grooves and the clamping sharp blocks, are clamped in the arc-shaped positioning grooves, and are positioned by the two support protrusions, so that the two side support steel wires are symmetrically arranged on the two sides of the surface of the cable. The two side support steel wires are hung and play a role in supporting and stabilizing the cable, so that the pressure on the cable during the hanging and mounting of the cable is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage cables, in particular to a fireproof and anti-interference low-voltage power cable. BACKGROUND

[0002] Low-voltage power cable is a kind of cable for transmitting low-voltage power, mainly used in power distribution systems in various places. Low-voltage power cable refers to power cable with rated voltage below 1kV, which is usually composed of conductor, insulation layer, filling layer, sheath and other accessories, can withstand certain current load, will not overheat or short circuit, and ensures the safety of power transmission. The anti-interference performance of the cable is to block electromagnetic interference (EMI) and radio frequency interference (RFI) to ensure signal transmission stability.

[0003] However, when the cable is suspended and installed, it will be affected by gravity for a long time, which will affect its interface and cause cable breakage and falling off. In addition, the cable lacks limiting when it is suspended, and is easily swayed and shaken under the influence of airflow and the surrounding environment, making the cable installation unstable. Therefore, the present application provides a fireproof and anti-interference low-voltage power cable to meet people's needs. SUMMARY

[0004] The present application provides a fireproof and anti-interference low-voltage power cable, which can effectively solve the problem of cable suspension and installation, long-term gravity effect, which will affect its interface, cause cable breakage and falling off, and lack of limiting when the cable is suspended, and is easily swayed and shaken under the influence of airflow and the surrounding environment, making the cable installation unstable.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a fireproof and anti-interference low-voltage power cable, comprising a core, an outer protective layer is sleeved on the outer side of the core, and a support anti-breaking mechanism is arranged on the surface of the outer protective layer.

[0006] The support anti-breaking mechanism comprises an arc-shaped positioning groove.

[0007] The arc-shaped positioning groove is equidistantly arranged on the surface of the outer protective layer, and an arc-shaped positioning strip is equidistantly attached to the bottom of the outer protective layer.

[0008] The two ends of the arc-shaped positioning strip are symmetrically fixedly connected with support protrusions, the bottom of the support protrusions is provided with an arc-shaped mounting groove, the two ends of the bottom of the arc-shaped mounting groove are symmetrically fixedly connected with limiting rubber protrusions, and a side support steel wire is penetrated and mounted in the arc-shaped mounting groove.

[0009] According to the above technical scheme, the inside of the arc-shaped positioning groove is equidistantly connected with a clamping sharp block, and the inner wall of the arc-shaped positioning strip is equidistantly provided with a splicing clamping groove.

[0010] The arc-shaped positioning strip is movably embedded in the interior of the arc-shaped positioning groove, and the clamping sharp block is inserted into the interior of the splicing clamping groove.

[0011] According to the above technical scheme, the number of the side support steel wires is two, the two side support steel wires are symmetrically distributed on the two sides of the middle part of the outer protective layer, the limiting rubber blocks are attached to the surface of the bottom of the side support steel wire, and the spacing between the two limiting rubber blocks is smaller than the diameter of the side support steel wire.

[0012] According to the above technical scheme, the surface of the core body is extruded and wrapped with an insulating layer, and the surface of the insulating layer is sleeved with an anti-interference braided layer.

[0013] The top end of the supporting block is fixedly installed with a fixed stud, and the middle part of the fixed stud is sleeved with a locking knob.

[0014] The bottom of the fixed stud is penetrated and installed with a connecting block, one end of the top of the connecting block is fixedly connected with a supporting vertical rod, the top ends of the corresponding two supporting vertical rods are fixedly connected with a transverse connecting rod, the top end of the transverse connecting rod is fixedly installed with a positioning ring, and the middle part of the top end of the transverse connecting rod is fixedly installed with a suspension stable steel wire.

[0015] The surface of the fixed stud is sleeved with a protective cylinder, and the top end of the surface of the outer protective layer is equidistantly provided with a stable groove.

[0016] According to the above technical scheme, the locking knob and the fixed stud are connected through threads, and the locking knob is tightly pressed on the top end of the connecting block.

[0017] According to the above technical scheme, the bottom end of the protective cylinder is attached to the top end of the connecting block, and the bottom end of the middle part of the transverse connecting rod is embedded in the interior of the stable groove.

[0018] According to the above technical scheme, the surface of the anti-interference braided layer is provided with a fireproof and heat-resistant mechanism.

[0019] The fireproof and heat-resistant mechanism comprises an inner heat insulation layer.

[0020] The surface of the anti-interference braided layer is sleeved with an inner heat insulation layer, the surface of the inner heat insulation layer is sleeved with a ceramic fireproof layer, the outer side of the ceramic fireproof layer is equidistantly sleeved with a limiting extrusion ring sleeve, the inner side of the limiting extrusion ring sleeve is equidistantly installed with a metal elastic peeling sheet in the circumferential direction, the bottom end of the metal elastic peeling sheet is fixedly connected with an arc-shaped attaching block, and the bottom end of the arc-shaped attaching block is fixedly bonded with a positioning double-sided bonding block.

[0021] A buffer sealing layer is filled and installed between the adjacent two limiting extrusion ring sleeves, and the surface of the buffer sealing layer is sleeved with a plastic layer.

[0022] The surface of the plastic layer is sleeved with an auxiliary fire extinguishing layer, an internal filling cavity is formed in the auxiliary fire extinguishing layer, and a plurality of partition ring strips are equidistantly arranged in the filling cavity.

[0023] The surface of the auxiliary fire extinguishing layer is extruded and wrapped with a protective layer, and the surface of the protective layer is sleeved with an external heat insulation layer.

[0024] According to the above technical scheme, the positioning double-sided bonding block is tightly wrapped around the surface of the ceramic fireproof layer, the metal elastic release sheet is extruded into a curved shape, and the inner wall of the limiting extrusion ring sleeve is tightly attached to the curved surface of the metal elastic release sheet.

[0025] According to the above technical scheme, the diameter of the surface wall of the buffer sealing layer is the same as that of the surface wall of the limiting extrusion ring sleeve, the surface wall of the buffer sealing layer is flush with the surface wall of the limiting extrusion ring sleeve, and the inner wall of the plastic layer is attached to the surface walls of the buffer sealing layer and the limiting extrusion ring sleeve.

[0026] According to the above technical scheme, the partition ring strips equidistantly divide the internal filling cavity into a plurality of storage cavities, the storage cavities are filled with fire extinguishing sand, and the surface wall of the external heat insulation layer is tightly attached to the inner wall of the external protective layer.

[0027] Compared with the prior art, the present application has the following advantages: the structure of the present application is scientific and reasonable, and the use is safe and convenient.

[0028] 1. The support anti-breaking mechanism is provided, the arc-shaped positioning strip is positioned and installed through the cooperation of the splicing clamping groove and the clamping sharp block, the clamping sharp block is clamped in the arc-shaped positioning groove, and then the two side support steel wires are positioned through the two support protrusions, so that the two side support steel wires are symmetrically distributed on both sides of the cable surface, the two side support steel wires are hung, the cable as a whole is supported and stabilized, and the pressure of the cable during hanging is relieved.

[0029] Meanwhile, the side support steel wire can position the cable, improve the stability of the cable hanging, prevent the cable from falling off under the action of gravity and from being broken due to left and right swinging under the action of airflow, and the limiting rubber protrusion can limit and stabilize the side support steel wire, preventing the side support steel wire from falling off from the arc-shaped installation groove.

[0030] 2. The connecting block and the fixed stud are spliced and fixed through the locking knob, so that the support vertical rod and the transverse connecting rod are fixed on the outside of the external protective layer, the positions of the positioning ring and the hanging stable steel wire are fixed, the hanging stable steel wire is located at the top of the cable outside, the cable as a whole is auxiliary supported and hung, the hanging gravity of the cable is relieved, and the probability of cable breakage is further reduced.

[0031] 3. The stabilizing grooves limit the movement of the transverse connecting rods, preventing them from tilting and improving the connection strength between the transverse connecting rods, the suspension stabilizing wires, and the outer protective layer. At the same time, the protective cylinders cover and protect the fixing studs and locking knobs, preventing corrosion caused by prolonged exposure and rainwater erosion, which could affect subsequent disassembly and maintenance.

[0032] 4. It is equipped with a fireproof and heat-resistant mechanism, which uses an auxiliary fire extinguishing layer to protect the entire cable. After the cable sheath is ignited, the fire extinguishing sand filling the cavity will bury the surrounding fire and assist in extinguishing the fire, thus mitigating the fire around the cable.

[0033] At the same time, by utilizing the elastic properties of the metal elastic strip, the cable is kept under pressure and bent during normal operation. Then, after the cable sheath is ignited and burned, the metal elastic strip pops outward, peeling off and ejecting the ignited material on the outside. By peeling off the ignited material, it plays an auxiliary role in extinguishing the fire, preventing the cable from continuing to burn and damaging its internal core, thus affecting the normal operation of the line and providing sufficient time for staff to repair the line.

[0034] 5. The ceramic fireproof layer is used to isolate and protect the core, preventing fire sources from damaging the core and improving the overall fire resistance of the cable. At the same time, the inner and outer heat insulation layers work together to protect the cable through two layers of insulation, reducing heat transfer to the core.

[0035] In summary, the combination of anti-breakage support and fire-resistant / heat-resistant mechanisms provides overall protection for the cable, reducing the stress on the cable during operation, making the cable more stable during suspension installation, and improving the cable's ability to survive in specific environments. This allows the cable to maintain a certain degree of integrity even in a fire, thus extending the cable's service life to some extent. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0037] In the attached diagram:

[0038] Figure 1 This is a schematic diagram of the structure of the present invention;

[0039] Figure 2 This is a schematic diagram of the cross-sectional structure of the cable of the present invention;

[0040] Figure 3 This is a schematic diagram of the installation structure for suspending and stabilizing the steel wire of the present invention;

[0041] Figure 4This is a schematic diagram of the structure of the anti-fracture support mechanism of the present invention;

[0042] Figure 5 This is a schematic diagram of the installation structure of the arc-shaped positioning strip of the present invention;

[0043] Figure 6 This is a schematic diagram of the installation structure of the limiting rubber protrusion of the present invention;

[0044] Figure 7 This is a schematic diagram of the installation structure of the buffer sealing layer of the present invention;

[0045] Figure 8 This is a schematic diagram of the fireproof and heat-resistant mechanism of the present invention;

[0046] Figure 9 This is a schematic diagram of the installation structure of the arc-shaped bonding block of the present invention;

[0047] The diagram labels are: 1. Core; 2. Insulation layer; 3. Anti-interference braided layer; 4. Outer protective layer.

[0048] 5. Support anti-breakage mechanism; 501. Arc-shaped positioning groove; 502. Snap-fitting pointed block; 503. Arc-shaped positioning strip; 504. Splicing slot; 505. Supporting protrusion; 506. Arc-shaped mounting groove; 507. Limiting rubber protrusion; 508. Side support steel wire; 509. Fixing stud; 510. Locking knob; 511. Connecting block; 512. Supporting vertical rod; 513. Horizontal connecting rod; 514. Positioning ring; 515. Suspension stabilizing steel wire; 516. Protective cylinder; 517. Stabilizing groove;

[0049] 6. Fireproof and heat-resistant structure; 601. Inner insulation layer; 602. Ceramic fireproof layer; 603. Limiting compression ring; 604. Metal elastic release sheet; 605. Arc-shaped bonding block; 606. Positioning double-sided adhesive block; 607. Buffer sealing layer; 608. Shaping layer; 609. Auxiliary fire extinguishing layer; 610. Filling cavity; 611. Separating ring; 612. Protective layer; 613. Outer insulation layer. Detailed Implementation

[0050] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0051] Example: Figures 1-9As shown, the present invention provides a technical solution, a fireproof and anti-interference low-voltage power cable, including a core 1, an insulation layer 2 extruded and wrapped on the surface of the core 1, the insulation layer 2 and the outer protective layer 4 are both made of insulating rubber extrusion, an anti-interference braided layer 3 is sleeved on the surface of the insulation layer 2, the anti-interference braided layer 3 is made of tin-plated copper wire braid, an outer protective layer 4 is sleeved on the outside of the core 1, and a support anti-breakage mechanism 5 is provided on the surface of the outer protective layer 4;

[0052] The anti-breakage support mechanism 5 includes an arc-shaped positioning groove 501, a snap-fit ​​tip 502, an arc-shaped positioning strip 503, a splicing slot 504, a support protrusion 505, an arc-shaped mounting groove 506, a limiting rubber protrusion 507, a side support steel wire 508, a fixing stud 509, a locking knob 510, a connecting block 511, a support vertical rod 512, a horizontal connecting rod 513, a positioning ring 514, a suspension stabilizing steel wire 515, a protective cylinder 516, and a stabilizing groove 517.

[0053] The bottom of the outer protective layer 4 is provided with arc-shaped positioning grooves 501 at equal intervals. The inside of the arc-shaped positioning grooves 501 is connected with snap-fit ​​tips 502 at equal intervals. The bottom of the outer protective layer 4 is fitted with arc-shaped positioning strips 503 at equal intervals. The inner wall of the arc-shaped positioning strips 503 is provided with splicing slots 504 at equal intervals. The arc-shaped positioning strips 503 are movably embedded into the inside of the arc-shaped positioning grooves 501. The snap-fit ​​tips 502 are inserted into the inside of the splicing slots 504.

[0054] The two ends of the arc-shaped positioning strip 503 are symmetrically fixedly connected with supporting protrusions 505. The bottom of the supporting protrusions 505 is provided with an arc-shaped mounting groove 506. The two ends of the bottom of the arc-shaped mounting groove 506 are symmetrically fixedly connected with limiting rubber protrusions 507. Side support steel wires 508 are installed through the arc-shaped mounting groove 506. There are two side support steel wires 508, which are symmetrically distributed on both sides of the middle of the outer protective layer 4. The limiting rubber protrusions 507 are in contact with the bottom surface of the side support steel wires 508. The spacing between 07 is less than the diameter of the side support steel wire 508. The splicing slot 504 and the snap-fit ​​tip 502 cooperate with each other to position and install the arc-shaped positioning strip 503, so that it is snapped into the inside of the arc-shaped positioning groove 501. Then, the two support protrusions 505 are used to position the two side support steel wires 508, so that the two side support steel wires 508 are symmetrically distributed on both sides of the cable surface. The two suspended side support steel wires 508 provide support and stability for the cable as a whole, and relieve the pressure on the cable during suspension installation.

[0055] Meanwhile, the side support steel wire 508 can position the cable, improve the stability of the cable suspension, prevent the cable from falling off under the action of gravity and from swinging left and right under the action of airflow, thus preventing it from breaking. In addition, the limiting rubber protrusion 507 plays a role in limiting and stabilizing the side support steel wire 508, preventing the side support steel wire 508 from falling out of the arc-shaped mounting groove 506.

[0056] A fixing stud 509 is fixedly installed on the top of the supporting protrusion 505. A locking knob 510 is sleeved in the middle of the fixing stud 509. The locking knob 510 and the fixing stud 509 are connected by threads. The locking knob 510 is pressed tightly against the top of the connecting block 511.

[0057] A connecting block 511 is installed through the bottom of the fixing stud 509. A support rod 512 is fixedly connected to the top of one end of the connecting block 511. A horizontal connecting rod 513 is fixedly connected between the tops of the two corresponding support rods 512. A positioning ring 514 is fixedly installed in the middle of the top of the horizontal connecting rod 513. A suspension and stabilizing steel wire 515 is installed through the middle of the positioning ring 514. The connecting block 511 and the fixing stud 509 are spliced ​​and fixed by the locking knob 510, so that the support rod 512 and the horizontal connecting rod 513 are fixed on the outside of the outer protective layer 4. This fixes the position of the positioning ring 514 and the suspension and stabilizing steel wire 515, so that the suspension and stabilizing steel wire 515 is located at the top of the outside of the cable. This provides auxiliary support and suspension for the cable, alleviates the suspension gravity on the cable, and further reduces the probability of cable breakage.

[0058] A protective cylinder 516 is fitted onto the surface of the fixing stud 509. A stabilizing groove 517 is provided at equal intervals on the top of the surface of the outer protective layer 4. The bottom end of the protective cylinder 516 fits into the top of the connecting block 511. The bottom end of the middle part of the transverse connecting rod 513 is embedded in the interior of the stabilizing groove 517. The stabilizing groove 517 plays a limiting role for the transverse connecting rod 513, preventing the transverse connecting rod 513 from tilting. This improves the connection strength between the transverse connecting rod 513, the suspension stabilizing steel wire 515 and the outer protective layer 4. At the same time, the protective cylinder 516 covers and protects the fixing stud 509 and the locking knob 510, preventing long-term exposure and rainwater erosion from causing rust and affecting subsequent disassembly and maintenance.

[0059] The surface of the anti-interference braided layer 3 is provided with a fireproof and heat-resistant mechanism 6;

[0060] The fireproof and heat-resistant mechanism 6 includes an inner heat insulation layer 601, a ceramic fireproof layer 602, a limiting extrusion ring 603, a metal elastic peeling sheet 604, an arc-shaped bonding block 605, a positioning double-sided adhesive block 606, a buffer sealing layer 607, a shaping layer 608, an auxiliary fire extinguishing layer 609, a filling cavity 610, a separating ring 611, a protective layer 612, and an outer heat insulation layer 613;

[0061] An inner heat insulation layer 601 is sleeved on the surface of the anti-interference braided layer 3. Both the inner heat insulation layer 601 and the outer heat insulation layer 613 are made of polyvinyl chloride extrusion. A ceramic fireproof layer 602 is sleeved on the surface of the inner heat insulation layer 601. A limiting extrusion ring 603 is sleeved at equal intervals on the outer side of the ceramic fireproof layer 602. Metal elastic release tabs 604 are installed at equal intervals along the circumferential direction on the inner side of the limiting extrusion ring 603. An arc-shaped adhesive block 605 is fixedly connected to the bottom end of the metal elastic release tab 604. A positioning double-sided adhesive block 606 is fixedly bonded to the bottom end of the arc-shaped adhesive block 605. The positioning double-sided adhesive block 606 is tightly attached to the surface of the ceramic fireproof layer 602. The metal elastic release tab 604 is squeezed into a curved shape. The inner wall of the limiting extrusion ring 603 is tightly attached to the arc surface of the metal elastic release tab 604.

[0062] A buffer sealing layer 607 is filled and installed between two adjacent limiting extrusion rings 603. A shaping layer 608 is sleeved on the surface of the buffer sealing layer 607. The diameter of the surface wall of the buffer sealing layer 607 is the same as the diameter of the surface wall of the limiting extrusion ring 603. The surface wall of the buffer sealing layer 607 is flush with the surface wall of the limiting extrusion ring 603. The inner wall of the shaping layer 608 is in contact with the surface walls of the buffer sealing layer 607 and the limiting extrusion ring 603.

[0063] An auxiliary fire extinguishing layer 609 is sleeved on the surface of the shaping layer 608. The auxiliary fire extinguishing layer 609 has a filling cavity 610 inside. The filling cavity 610 is equipped with partition rings 611 at equal intervals. The partition rings 611 divide the filling cavity 610 into multiple storage cavities at equal intervals. The storage cavities are filled with fire extinguishing sand. The auxiliary fire extinguishing layer 609 protects the cable as a whole. After the cable sheath is ignited, the fire extinguishing sand inside the filling cavity 610 will bury the surrounding fire and assist in extinguishing the fire, thus mitigating the fire around the cable.

[0064] Simultaneously, utilizing the elastic properties of the metal elastic strip 604, the cable remains under pressure and bent during normal operation. Then, after the cable sheath is ignited and burned, the metal elastic strip 604 pops outward, peeling off and ejecting the ignited material from the outer surface. This act of peeling off the ignited material assists in extinguishing the fire, preventing the cable from continuing to burn and damaging the internal core 1, thus affecting the normal operation of the line and providing sufficient time for maintenance personnel.

[0065] The surface of the auxiliary fire extinguishing layer 609 is covered with a protective layer 612 by extrusion, and an outer heat insulation layer 613 is sleeved on the surface of the protective layer 612. The outer wall of the outer heat insulation layer 613 is tightly attached to the inner wall of the outer protective layer 4. The ceramic fireproof layer 602 is used to isolate and protect the core 1, preventing fire sources from damaging the core 1 and improving the overall fire resistance of the cable. At the same time, the cooperation between the inner heat insulation layer 601 and the outer heat insulation layer 613 provides protection for the cable through two layers of heat insulation, reducing heat transfer to the core 1.

[0066] The working principle and usage process of this invention are as follows: First, before the cable suspension installation, the arc-shaped positioning strip 503 is embedded inside the arc-shaped positioning groove 501, and the snap-fit ​​tip 502 is snapped into the splicing slot 504 so that the arc-shaped positioning strip 503 will not easily sway left and right. The two side support steel wires 508 are installed through the arc-shaped installation groove 506, and the limiting rubber protrusion 507 is attached to and intercepted at the bottom end of the side support steel wires 508 so that they will not easily fall off.

[0067] Then take the support rod 512 and make its bottom symmetrical support protrusion 505. The connecting block 511 passes through the outside of the fixing stud 509. Tighten it with the locking knob 510 to lock and fix the connecting block 511. Then the support rod 512 is fixed on both sides of the outer protective layer 4. The horizontal connecting rod 513 is close to the top of the outer protective layer 4 and the bottom end is embedded in the inside of the stabilizing groove 517. The horizontal connecting rod 513 and the arc-shaped positioning strip 503 are indirectly fixed and connected, so that the two are located at the top and bottom of the outer protective layer 4 respectively, preventing them from detaching from the cable surface. The suspension stabilizing steel wire 515 is moved through the positioning ring 514.

[0068] During cable installation, the cable is fixedly connected to the line, and then the side support steel wire 508 and the suspension stabilizing steel wire 515 are fixedly installed at certain positions. Both the side support steel wire 508 and the suspension stabilizing steel wire 515 are kept taut, which provides support and stability for the cable as a whole. Both the two side support steel wires 508 and the suspension stabilizing steel wire 515 alleviate the gravity on the cable, preventing the cable from breaking and falling off due to continuous gravity. The two side support steel wires 508 are symmetrically distributed on both sides of the cable, which provides protection and stability for the cable in the left and right directions, preventing it from swinging left and right. The suspension stabilizing steel wire 515 improves the overall stability of the cable and reduces its shaking. The protective cylinder 516 can be twisted and fixed to the outside of the fixing stud 509 and the locking knob 510, which protects the fixing stud 509 and the locking knob 510 from dust or rainwater corrosion, which would affect subsequent disassembly and maintenance.

[0069] The cable has an inner heat insulation layer 601 and an outer heat insulation layer 613 for double heat insulation protection, reducing the transfer of external heat to the core 1. At the same time, the ceramic fireproof layer 602 is sturdy and plays a supporting and limiting role for the metal elastic release sheet 604. When one end of it is squeezed and deformed, the ceramic fireproof layer 602 supports it to prevent it from acting on the core 1 and causing damage. The limiting and squeezing ring 603 shapes and fits the metal elastic release sheet 604, making it deformed and bent.

[0070] In the event of a fire outside the cable, if the fire source is far from the cable, the heat generated by the fire will be insulated by the outer insulation layer 613 and the inner insulation layer 601. If the fire source is close to the cable, it will ignite the surface structure of the cable. The outer protective layer 4, the outer insulation layer 613 and the protective layer 612 will be burned by the cable in sequence. Then, when the surface wall of the auxiliary fire extinguishing layer 609 is burned, the fire extinguishing sand inside the cavity 610 will be sprayed outward to bury the fire source, which plays an auxiliary role in fire extinguishing and slows down the spread of the fire.

[0071] If the fire is not extinguished by fire-extinguishing sand, it will continue to burn the auxiliary fire-extinguishing layer 609 and the shaping layer 608, and spread into the cable. After the limiting compression ring 603 is burned off, it will no longer exert limiting compression force on the metal elastic strip 604. The metal elastic strip 604 will elastically unfold outward. The elastic force generated at the moment of unfolding will peel off and eject the burning material on its outside, so that the burning material is away from the core 1, preventing the internal structure of the cable from continuing to burn. In addition, the ceramic fireproof layer 602 plays a role in fire isolation, isolating the core 1 from the fire source, keeping the cable line unobstructed, and providing enough time for extinguishing the fire and replacing the line.

[0072] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended 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 described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fire-resistant and interference-resistant low-voltage power cable, comprising a core (1), characterized in that: The outer protective layer (4) is sleeved on the outside of the core (1), and a support anti-breakage mechanism (5) is provided on the surface of the outer protective layer (4). The support anti-fracture mechanism (5) includes an arc-shaped positioning groove (501); The bottom of the outer protective layer (4) is provided with arc-shaped positioning grooves (501) at equal intervals, and the bottom of the outer protective layer (4) is provided with arc-shaped positioning strips (503) at equal intervals. The arc-shaped positioning strip (503) is symmetrically fixedly connected to two ends of a support protrusion (505). An arc-shaped mounting groove (506) is provided at the bottom of the support protrusion (505). Limiting rubber protrusions (507) are symmetrically fixedly connected to both ends of the bottom of the arc-shaped mounting groove (506). Side support steel wires (508) are installed through the inside of the arc-shaped mounting groove (506). The core (1) is covered with an insulating layer (2) by extrusion, and an anti-interference braided layer (3) is sleeved on the surface of the insulating layer (2). A fireproof and heat-resistant mechanism (6) is provided on the surface of the anti-interference braided layer (3). The fireproof and heat-resistant mechanism (6) includes an inner heat insulation layer (601); An inner heat insulation layer (601) is sleeved on the surface of the anti-interference braided layer (3), and a ceramic fireproof layer (602) is sleeved on the surface of the inner heat insulation layer (601). A limiting extrusion ring (603) is sleeved at equal intervals on the outer side of the ceramic fireproof layer (602). Metal elastic release tabs (604) are installed at equal intervals along the circumferential direction on the inner side of the limiting extrusion ring (603). An arc-shaped bonding block (605) is fixedly connected to the bottom end of the metal elastic release tab (604), and a positioning double-sided bonding block (606) is fixedly bonded to the bottom end of the arc-shaped bonding block (605). A buffer sealing layer (607) is filled and installed between two adjacent limiting compression ring sleeves (603), and a shaping layer (608) is sleeved on the surface of the buffer sealing layer (607). An auxiliary fire extinguishing layer (609) is sleeved on the surface of the shaping layer (608). A filling cavity (610) is provided inside the auxiliary fire extinguishing layer (609). Dividing rings (611) are installed at equal intervals inside the filling cavity (610). The surface of the auxiliary fire extinguishing layer (609) is covered with a protective layer (612) by extrusion, and the surface of the protective layer (612) is fitted with an external heat insulation layer (613). The positioning double-sided adhesive block (606) is tightly attached to the surface of the ceramic fireproof layer (602), the metal elastic release sheet (604) is squeezed into a bent shape, and the inner wall of the limiting extrusion ring (603) is tightly attached to the arc surface of the metal elastic release sheet (604).

2. The fire-resistant and interference-resistant low-voltage power cable according to claim 1, characterized in that, There are two side support steel wires (508), which are symmetrically distributed on both sides of the middle part of the outer protective layer (4). The limiting rubber protrusions (507) are in contact with the bottom surface of the side support steel wires (508), and the distance between the two limiting rubber protrusions (507) is smaller than the diameter of the side support steel wires (508).

3. The fire-resistant and interference-resistant low-voltage power cable according to claim 1, characterized in that, The arc-shaped positioning groove (501) is equidistantly connected with snap-fit ​​tips (502), and the inner wall of the arc-shaped positioning strip (503) is provided with splicing snap-fit ​​grooves (504) at equal intervals. The arc-shaped positioning strip (503) is movably embedded inside the arc-shaped positioning groove (501), and the snap-fit ​​tip (502) is inserted into the splicing slot (504).

4. The fire-resistant and interference-resistant low-voltage power cable according to claim 1, characterized in that, The top of the support protrusion (505) is fixedly installed with a fixing stud (509), and a locking knob (510) is sleeved in the middle of the fixing stud (509). A connecting block (511) is installed through the bottom of the fixing stud (509). A supporting vertical rod (512) is fixedly connected to the top of one end of the connecting block (511). A horizontal connecting rod (513) is fixedly connected between the top ends of the two corresponding supporting vertical rods (512). A positioning ring (514) is fixedly installed in the middle of the top end of the horizontal connecting rod (513). A suspension and stabilizing steel wire (515) is installed through the middle of the positioning ring (514). The surface of the fixing stud (509) is fitted with a protective cylinder (516), and the top of the surface of the outer protective layer (4) is provided with equidistant stabilizing grooves (517).

5. A fire-resistant and interference-resistant low-voltage power cable according to claim 4, characterized in that, The locking knob (510) and the fixing stud (509) are connected by threads, and the locking knob (510) is pressed tightly against the top of the connecting block (511).

6. The fire-resistant and interference-resistant low-voltage power cable according to claim 4, characterized in that, The bottom end of the protective cylinder (516) and the top end of the connecting block (511) are fitted together, and the bottom end of the middle part of the transverse connecting rod (513) is embedded in the interior of the stabilizing groove (517).

7. The fire-resistant and interference-resistant low-voltage power cable according to claim 1, characterized in that, The diameter of the outer wall of the buffer sealing layer (607) is the same as the diameter of the outer wall of the limiting extrusion ring (603). The outer wall of the buffer sealing layer (607) and the outer wall of the limiting extrusion ring (603) are flush. The inner wall of the shaping layer (608) is in contact with the outer walls of the buffer sealing layer (607) and the limiting extrusion ring (603).

8. A fire-resistant and interference-resistant low-voltage power cable according to claim 1, characterized in that, The dividing ring (611) divides the interior of the filling cavity (610) into multiple storage cavities at equal intervals. The storage cavities are filled with fire extinguishing sand. The outer wall of the outer heat insulation layer (613) is tightly attached to the inner wall of the outer protective layer (4).

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