Fireproof anti-interference low-voltage power cable

Abstract

The invention discloses a fireproof anti-interference low-voltage power cable, and relates to the technical field of low-voltage cables, arc-shaped positioning grooves are formed in the bottom of the surface of an outer protection layer at equal intervals, arc-shaped positioning strips are attached to the bottom of the outer protection layer at equal intervals, and supporting convex blocks are symmetrically and fixedly connected to the two ends of each arc-shaped positioning strip; and arc-shaped mounting grooves are formed in the bottoms of the supporting protruding blocks, limiting rubber protruding blocks are symmetrically and fixedly connected to the two ends of the bottoms of the arc-shaped mounting grooves, and side supporting steel wires are mounted in the arc-shaped mounting grooves in a penetrating mode. The two side supporting steel wires are clamped in the arc-shaped positioning grooves through the arc-shaped positioning grooves, then the two side supporting steel wires are positioned through the two supporting protruding blocks, the two side supporting steel wires are symmetrically distributed on the two sides of the surface of the cable, and the two suspended side supporting steel wires are used for supporting and stabilizing the whole cable. And the pressure borne by the cable during suspension installation is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage cables, in particular to a fire-proof and anti-interference low-voltage power cable. Background Art

[0002] Low-voltage power cable is a cable used to transmit low-voltage electrical energy. It is mainly used in power distribution systems in various places. Low-voltage power cable refers to power cables with a rated voltage of 1kV and below. It is usually composed of a conductor, an insulation layer, a filling layer, a sheath, and other accessories. It can withstand a certain current load and will not overheat or short-circuit, ensuring 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 the stability of signal transmission.

[0003] However, when cables are currently suspended for installation, they are affected by gravity for a long time, which will affect their interfaces and cause the cables to break and fall off. In addition, the cables are suspended without any limit and are easily swayed left and right under the influence of airflow and surrounding environment, making the cable installation and operation unstable. Therefore, the present invention provides a fire-proof and anti-interference low-voltage power cable to meet people's needs. Summary of the Invention

[0004] The present invention provides a fire-proof and anti-interference low-voltage power cable, which can effectively solve the problem proposed in the above background technology that the cable is affected by gravity for a long time during suspension installation, which will affect its interface and cause the cable to break and fall off. In addition, the cable is suspended in the air without a limit, and is easily swayed left and right under the influence of airflow and surrounding environment, making the cable installation and operation unstable.

[0005] To achieve the above object, the present invention provides the following technical solution: a fire-proof and anti-interference low-voltage power cable, comprising a core body, an outer protective layer sheathed on the outer side of the core body, and a support and anti-fracture mechanism provided on the surface of the outer protective layer;

[0006] The support anti-fracture mechanism includes an arc-shaped positioning groove;

[0007] The bottom of the outer protective layer surface is provided with arc-shaped positioning grooves at equal intervals, and the bottom of the outer protective layer is provided with arc-shaped positioning strips at equal intervals;

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

[0009] According to the above technical solution, the interior of the arc-shaped positioning groove is equidistantly connected with snap-fitting pointed blocks, and the inner wall of the arc-shaped positioning strip is equidistantly provided with splicing snap-fitting grooves;

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

[0011] According to the above technical solution, the number of the side support steel wires is two, and the two side support steel wires are symmetrically distributed on both sides of the middle of the outer protective layer. The limiting rubber protrusion fits the surface of the bottom of the side support steel wire, and the distance between the two limiting rubber protrusions is smaller than the diameter of the side support steel wire.

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

[0013] A fixing stud is fixedly installed on the top of the supporting protrusion, and a locking knob is sleeved on the middle of the fixing stud;

[0014] A connecting block is installed through the bottom of the fixing stud, and a supporting vertical rod is fixedly connected to the top of one end of the connecting block. A transverse connecting rod is fixedly connected between the top ends of the two corresponding supporting vertical rods. A positioning ring is fixedly installed in the middle of the top end of the transverse connecting rod, and a hanging stabilizing steel wire is installed through the middle of the positioning ring.

[0015] A protective cylinder is sleeved on the surface of the fixing stud, and stabilizing grooves are equidistantly formed on the top of the surface of the outer protective layer.

[0016] According to the above technical solution, the locking knob and the fixing stud are connected via threads, and the locking knob is tightly pressed against the top of the connecting block.

[0017] According to the above technical solution, the bottom end of the protective cylinder fits in with the top end of the connecting block, and the bottom end of the middle portion of the transverse connecting rod is embedded in the interior of the stabilizing groove.

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

[0019] The fireproof and heat-resistant structure includes an inner heat-insulating layer;

[0020] The surface of the anti-interference braided layer is sleeved with an inner heat-insulating layer, the surface of the inner heat-insulating layer is sleeved with a ceramic fireproof layer, the outer side of the ceramic fireproof layer is sleeved with a limited extrusion ring sleeve at equal intervals, the inner side of the limited extrusion ring sleeve is installed with metal elastic peeling pieces at equal intervals along the circumferential direction, the bottom end of the metal elastic peeling piece is fixedly connected to an arc-shaped bonding block, and the bottom end of the arc-shaped bonding block is fixedly bonded with a positioning double-sided bonding block;

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

[0022] The surface of the shaping layer is sleeved with an auxiliary fire extinguishing layer, the interior of the auxiliary fire extinguishing layer is provided with a filling cavity, and the interior of the filling cavity is equidistantly provided with separation ring strips;

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

[0024] According to the above technical solution, the positioning double-sided adhesive block surrounds and tightly adheres to the surface of the ceramic fireproof layer, the metal elastic stripping piece is squeezed into a curved shape, and the inner wall of the limiting extrusion ring sleeve is tightly adhered to the arc surface of the metal elastic stripping piece.

[0025] According to the above technical solution, the diameter of the surface wall of the buffer sealing layer is the same as the diameter 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 in contact with the surface wall of the buffer sealing layer and the limiting extrusion ring sleeve.

[0026] According to the above technical solution, the separation ring strip divides the interior of the filling cavity into multiple storage cavities at equal intervals. The storage cavities are filled with fire extinguishing sand. The surface wall of the outer insulation layer is tightly fitted with the inner wall of the outer protective layer.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0028] 1. A support and anti-fracture mechanism is provided. The splicing slot and the snap-on tip block cooperate with each other to position and install the arc-shaped positioning strip, so that it is snapped into the inside of the arc-shaped positioning slot. Then, two supporting protrusions are used to position the two side support steel wires, so that the two side support steel wires are symmetrically distributed on both sides of the cable surface. The two suspended side support steel wires play a role in supporting and stabilizing the cable as a whole, thereby alleviating the pressure on the cable during suspension installation.

[0029] At the same time, the side support steel wire can position the cable, improve the stability of the cable suspension, prevent the cable from falling off due to gravity and swinging left and right due to airflow and breaking, and the limiting rubber bumps can limit and stabilize the side support steel wire, preventing the side support steel wire from falling off from the inside of the arc-shaped installation groove.

[0030] 2. Use the locking knob to splice and fix the connecting block and the fixing stud, so that the supporting vertical rod and the horizontal connecting rod are fixed to the outside of the outer protective layer, which fixes the position of the positioning ring and the suspension stabilizing wire. The suspension stabilizing wire is located at the top of the outside of the cable, which plays an auxiliary supporting and hanging role for the cable as a whole, relieves the suspension gravity on the cable, and further reduces the chance of cable breakage.

[0031] 3. The stabilizing groove limits the transverse connecting rod, preventing it from tilting, and improving the connection strength between the transverse connecting rod, the suspension stabilizing wire and the outer protective layer. At the same time, the protective cylinder is used to cover and protect the fixing studs and locking knobs to prevent rust caused by long-term exposure and rain erosion, which affects 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. When the cable skin is ignited, the fire extinguishing sand filling the cavity will bury the surrounding fire and assist in extinguishing the fire, thereby alleviating the fire around the cable;

[0033] At the same time, the elastic properties of the metal elastic stripping sheet are utilized to keep the cable under pressure, deformed and bent during normal operation. Then, after the cable skin is ignited and burned, the metal elastic stripping sheet pops outward, stripping off the ignited material on the outside and ejecting it. By stripping off the ignited material, it plays an auxiliary fire extinguishing role, preventing the cable from continuing to burn and causing damage to its internal core, 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 to prevent fire from damaging the core, thereby improving the overall fire resistance of the cable. At the same time, the inner and outer insulation layers work together to protect the cable through two layers of insulation, reducing heat transfer to the core.

[0035] To sum up, by combining the support anti-fracture mechanism with the fireproof and heat-resistant mechanism, the cable is protected as a whole, the pressure on the cable during operation is reduced, and the cable is more stable when suspended and installed. At the same time, the cable's ability to be preserved in a specific environment is improved, so that the cable can maintain a certain integrity in a fire environment, which can extend the service life of the cable to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0037] In the attached figure:

[0038] Figure 1 It is a structural schematic diagram of the present invention;

[0039] Figure 2 1 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 of the suspension stabilizing steel wire of the present invention;

[0041] Figure 4It is a structural schematic diagram of the support anti-fracture 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 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 It is a structural 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 fitting block of the present invention;

[0047] Numbers in the figure: 1, core; 2, insulation layer; 3, anti-interference braided layer; 4, outer protective layer;

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

[0049] 6. Fireproof and heat-resistant structure; 601. Inner insulation layer; 602. Ceramic fireproof layer; 603. Limiting extrusion ring; 604. Metal elastic peeling piece; 605. Arc-shaped fitting block; 606. Positioning double-sided adhesive block; 607. Buffer sealing layer; 608. Shaping layer; 609. Auxiliary fire extinguishing layer; 610. Filling cavity; 611. Separation ring strip; 612. Protective layer; 613. Outer insulation layer. DETAILED DESCRIPTION

[0050] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0051] Example: Figure 1-9As shown, the present invention provides a technical solution, a fire-proof and anti-interference low-voltage power cable, comprising a core 1, the surface of the core 1 is extruded and wrapped with an insulating layer 2, the insulating layer 2 and the outer protective layer 4 are both extruded from insulating rubber, the surface of the insulating layer 2 is sleeved with an anti-interference braided layer 3, the anti-interference braided layer 3 is woven from tinned copper wire, the outer side of the core 1 is sleeved with an outer protective layer 4, and the surface of the outer protective layer 4 is provided with a support anti-fracture mechanism 5;

[0052] The support anti-fracture mechanism 5 includes an arc-shaped positioning groove 501, a snap-fitting 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 wire 508, a fixing stud 509, a locking knob 510, a connecting block 511, a support vertical rod 512, a transverse connecting rod 513, a positioning ring 514, a suspension stabilizing 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, and snap-fitting blocks 502 are connected to the inside of the arc-shaped positioning grooves 501 at equal intervals. The bottom of the outer protective layer 4 is fitted with arc-shaped positioning strips 503 at equal intervals, and 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 in the interior of the arc-shaped positioning grooves 501, and the snap-fitting blocks 502 are inserted into the interior of the splicing slots 504.

[0054] The two ends of the arc-shaped positioning strip 503 are symmetrically fixedly connected with support protrusions 505, and the bottom of the support protrusion 505 is provided with an arc-shaped installation groove 506. The two ends of the bottom of the arc-shaped installation groove 506 are symmetrically fixedly connected with limited rubber protrusions 507. The inside of the arc-shaped installation groove 506 is penetrated and installed with side support steel wires 508. There are two side support steel wires 508. The two side support steel wires 508 are symmetrically distributed on both sides of the middle of the outer protective layer 4. The limiting rubber protrusion 507 fits with the surface of the bottom of the side support steel wire 508. The two limiting rubber protrusions 507 are in contact with the surface of the bottom of the side support steel wire 508. The spacing between 07 is smaller than the diameter of the side support steel wire 508. The splicing slot 504 and the snap-on tip block 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 slot 501. Then, the two supporting 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 play a role in supporting and stabilizing the cable as a whole, thereby alleviating the pressure on the cable during suspension installation.

[0055] At the same time, the side support wire 508 can play a role in positioning the cable, improving the stability of the cable suspension, preventing the cable from falling off due to gravity and swinging left and right due to airflow and breaking, and the limiting rubber protrusion 507 plays a role in limiting and stabilizing the side support wire 508, preventing the side support wire 508 from falling off from the inside of the arc-shaped installation groove 506;

[0056] A fixing stud 509 is fixedly mounted on the top of the support protrusion 505, and a locking knob 510 is sleeved on the middle of the fixing stud 509. The locking knob 510 and the fixing stud 509 are connected by a thread, and the locking knob 510 is pressed tightly against the top of the connecting block 511;

[0057] The bottom of the fixing stud 509 is provided with a connecting block 511, and the top of one end of the connecting block 511 is fixedly connected to a supporting vertical rod 512. A transverse 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 at the middle part of the top end of the transverse connecting rod 513. A hanging and stabilizing wire 515 is installed through the middle part of the positioning ring 514. The connecting block 511 and the fixing stud 509 are spliced ​​and fixed by using the locking knob 510, so that the supporting vertical rod 512 and the transverse connecting rod 513 are fixed to the outside of the outer protective layer 4, which plays a role in fixing the positions of the positioning ring 514 and the hanging and stabilizing wire 515. The hanging and stabilizing wire 515 is located at the top of the outer side of the cable, which plays a role in auxiliary support and suspension of the cable as a whole, relieves the hanging gravity effect on the cable, and further reduces the probability of cable breakage.

[0058] A protective cylinder 516 is sleeved on the surface of the fixing stud 509, and stabilizing grooves 517 are equidistantly opened on the top of the surface of the outer protective layer 4. The bottom end of the protective cylinder 516 fits in with the top end of the connecting block 511, and the bottom end of the middle part of the transverse connecting rod 513 is embedded in the stabilizing groove 517. The stabilizing groove 517 limits the transverse connecting rod 513, preventing it from tilting, thereby improving the connection strength between the transverse connecting rod 513, the suspension stabilizing wire 515 and the outer protective layer 4. At the same time, the protective cylinder 516 is used to cover and protect the fixing stud 509 and the locking knob 510 to prevent rust caused by long-term exposure and rain erosion, which affects 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 structure 6 includes an inner heat-insulating layer 601, a ceramic fireproof layer 602, a limiting extrusion ring 603, a metal elastic stripping piece 604, an arc-shaped fitting 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-insulating layer 613;

[0061] The surface of the anti-interference braided layer 3 is sleeved with an inner insulation layer 601, and the inner insulation layer 601 and the outer insulation layer 613 are both formed by polyvinyl chloride extrusion wrapping. The surface of the inner insulation layer 601 is sleeved with a ceramic fireproof layer 602, and a limiting extrusion ring sleeve 603 is equidistantly sleeved on the outside of the ceramic fireproof layer 602. A metal elastic stripping piece 604 is equidistantly installed on the inside of the limiting extrusion ring sleeve 603 along the circumferential direction. The bottom end of the metal elastic stripping piece 604 is fixedly connected to an arc-shaped fitting block 605, and the bottom end of the arc-shaped fitting block 605 is fixedly bonded with a positioning double-sided bonding block 606. The positioning double-sided bonding block 606 surrounds and clings to the surface of the ceramic fireproof layer 602. The metal elastic stripping piece 604 is extruded into a curved shape, and the inner wall of the limiting extrusion ring sleeve 603 is in close contact with the arc surface of the metal elastic stripping piece 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 wall of the buffer sealing layer 607 and the surface wall of the limiting extrusion ring 603.

[0063] 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. Separation rings 611 are installed equidistantly inside the filling cavity 610. The separation 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. If the cable skin is ignited, the fire extinguishing sand inside the filling cavity 610 will bury the surrounding fire and assist in extinguishing the fire, thereby alleviating the fire around the cable.

[0064] At the same time, the elastic properties of the metal elastic stripping sheet 604 are utilized to keep the cable deformed and bent under pressure during normal operation. Then, after the cable skin is ignited and burned, the metal elastic stripping sheet 604 pops outward, peeling off the ignited material on the outside and sending it flying. By peeling off the ignited material, it plays an auxiliary fire extinguishing role, preventing the cable from continuing to burn and causing damage to its internal core 1, affecting the normal operation of the line, and providing sufficient time for the staff to repair the line.

[0065] The surface of the auxiliary fire extinguishing layer 609 is extruded and wrapped with a protective layer 612, and the surface of the protective layer 612 is sleeved with an outer thermal insulation layer 613. The surface wall of the outer thermal insulation layer 613 is tightly fitted with the inner wall of the outer protective layer 4. The ceramic fireproof layer 602 is used to isolate and protect the core 1 to prevent the fire source from causing damage to the core 1, thereby improving the overall fireproof performance of the cable. At the same time, the inner thermal insulation layer 601 and the outer thermal insulation layer 613 cooperate with each other to protect the cable through two layers of thermal insulation, thereby reducing heat transfer to the core 1.

[0066] The working principle and usage process of the present invention are as follows: First, before the cable is suspended and installed, the arc-shaped positioning bar 503 is embedded in the arc-shaped positioning groove 501, and the snap-fitting tip block 502 is snapped into the splicing slot 504 to prevent the arc-shaped positioning bar 503 from easily shaking left and right. The two side support wires 508 are installed through the inside of the arc installation groove 506, and the limiting rubber protrusion 507 is fit to intercept the bottom end of the side support wire 508 to prevent it from falling off easily.

[0067] Then take the support vertical rod 512, make its bottom symmetrical support protrusion 505, the connecting block 511 pass through the outside of the fixing stud 509, and tighten it with the locking knob 510 to lock and fix the connecting block 511. Then the support vertical rod 512 is fixed to both sides of the outer protective layer 4, and the transverse connecting rod 513 is tightly attached to the top of the outer protective layer 4, and the bottom end is embedded in the inside of the stabilizing groove 517, which indirectly fixes the transverse connecting rod 513 and the arc-shaped positioning strip 503, so that the two are respectively located at the top and bottom ends of the outer protective layer 4 to prevent them from detaching from the cable surface. The hanging stabilizing wire 515 is movably passed through the positioning ring 514;

[0068] During cable installation and construction, the cable is fixedly connected to the line, and then the side support wire 508 and the hanging stabilizing wire 515 are fixedly installed at a certain position, and the side support wire 508 and the hanging stabilizing wire 515 are kept in a straight state, which plays a supporting and stabilizing role for the cable as a whole. The two side support wires 508 and the hanging stabilizing wire 515 both alleviate the gravity effect on the cable, preventing the cable from being broken and falling off due to continuous gravity. The two side support wires 508 are symmetrically distributed on both sides of the cable, which plays a protective and stabilizing role in the left and right directions of the cable, preventing it from swinging left and right. The hanging stabilizing wire 515 improves the overall stability of the cable and reduces its shaking. The protective cylinder 516 can be twisted and fixed on the outside of the fixing stud 509 and the locking knob 510, which plays a protective role for the fixing stud 509 and the locking knob 510, preventing dust from falling or being eroded by rainwater and affecting subsequent disassembly and maintenance;

[0069] The inner insulation layer 601 and the outer insulation layer 613 inside the cable provide double insulation protection, reducing the transfer of external heat to the core 1. At the same time, the ceramic fireproof layer 602 is strong and supports and limits the metal elastic stripping piece 604. When one end of the metal elastic stripping piece is squeezed and deformed, the ceramic fireproof layer 602 supports it to prevent it from affecting the core 1 and causing damage. The limiting extrusion ring 603 shapes and sleeves the metal elastic stripping piece 604, making it deformed and bent.

[0070] In the event of a fire outside the cable, if the fire source is far away from the cable, the heat generated by the fire will be isolated by the outer insulation layer 613 and the inner insulation layer 601. If the fire source is close to the cable, the surface structure of the cable will be ignited, and the outer protective layer 4, the outer insulation layer 613 and the protective layer 612 will be burned by the cable in turn. Then, when the surface wall of the auxiliary fire extinguishing layer 609 is burned, the fire extinguishing sand filling the cavity 610 will be sprayed outward to bury the fire source, playing an auxiliary fire extinguishing role and slowing down the spread of the fire.

[0071] If the fire is not extinguished by the fire extinguishing sand, it will continue to burn the auxiliary fire extinguishing layer 609 and the shaping layer 608 and spread to the inside of the cable. After the limiting extrusion ring 603 is burned off, it will no longer generate limiting extrusion pressure on the metal elastic stripping piece 604. The metal elastic stripping piece 604 will elastically expand outward. The elastic force generated at the moment of expansion will peel off the burning material on the outside and bounce it away, so that the burning material is away from the core 1, preventing the internal structure of the cable from continuing to burn. The ceramic fireproof layer 602 plays a role in isolating and preventing fire, isolating the core 1 from the fire source, so that the cable line remains unobstructed, providing sufficient time for extinguishing the fire and replacing the line.

[0072] Finally, it should be noted that the above description is merely 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 will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fireproof and anti-interference low-voltage power cable, comprising a core (1), characterized in that: An outer protective layer (4) is sleeved on the outer side of the core (1), and a support anti-fracture mechanism (5) is provided on the surface of the outer protective layer (4); The support anti-fracture mechanism (5) comprises an arc-shaped positioning groove (501); The bottom of the surface 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 fitted with arc-shaped positioning strips (503) at equal intervals; The two ends of the arc-shaped positioning strip (503) are symmetrically fixedly connected with supporting protrusions (505), the bottom of the supporting protrusion (505) is provided with an arc-shaped installation groove (506), the two ends of the bottom of the arc-shaped installation groove (506) are symmetrically fixedly connected with limiting rubber protrusions (507), and the inside of the arc-shaped installation groove (506) is penetrated by a side support steel wire (508).

2. A fire-proof and anti-interference low-voltage power cable according to claim 1, characterized in that: The number of the side support steel wires (508) is two, and the two side support steel wires (508) 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 surfaces of the bottoms of the side support steel wires (508), and the spacing between the two limiting rubber protrusions (507) is smaller than the diameter of the side support steel wires (508).

3. The fire-proof and anti-interference low-voltage power cable according to claim 1, characterized in that: The interior of the arc-shaped positioning groove (501) is equidistantly connected with snap-fitting pointed blocks (502), and the inner wall of the arc-shaped positioning strip (503) is equidistantly provided with splicing snap-fitting grooves (504); The arc-shaped positioning strip (503) is movably embedded in the interior of the arc-shaped positioning groove (501), and the snap-fitting tip block (502) is inserted into the interior of the splicing slot (504).

4. The fire-proof and anti-interference low-voltage power cable according to claim 1, characterized in that: The surface of the core (1) is extruded and wrapped with an insulating layer (2), and the surface of the insulating layer (2) is sleeved with an anti-interference braided layer (3); A fixing stud (509) is fixedly mounted on the top of the supporting protrusion (505), and a locking knob (510) is sleeved on 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 transverse 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 transverse connecting rod (513), and a hanging stabilizing steel wire (515) is installed through the middle of the positioning ring (514); The surface of the fixing stud (509) is sleeved with a protective cylinder (516), and the top of the surface of the outer protective layer (4) is equidistantly provided with stabilizing grooves (517).

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

6. The fire-proof and anti-interference low-voltage power cable according to claim 4, characterized in that: The bottom end of the protective cylinder (516) fits in with the top end of the connecting block (511), and the bottom end of the middle portion of the transverse connecting rod (513) is embedded in the interior of the stabilizing groove (517).

7. The fire-proof and anti-interference low-voltage power cable according to claim 1, characterized in that: The surface of the anti-interference braided layer (3) is provided with a fireproof and heat-resistant mechanism (6); The fireproof and heat-resistant structure (6) includes an inner heat-insulating layer (601); The surface of the anti-interference braided layer (3) is sleeved with an inner heat-insulating layer (601), the surface of the inner heat-insulating layer (601) is sleeved with a ceramic fireproof layer (602), the outer side of the ceramic fireproof layer (602) is sleeved with a limiting extrusion ring (603) at equal intervals, the inner side of the limiting extrusion ring (603) is equidistantly installed with a metal elastic stripping piece (604) along the circumferential direction, the bottom end of the metal elastic stripping piece (604) is fixedly connected with an arc-shaped bonding block (605), and the bottom end of the arc-shaped bonding block (605) is fixedly bonded with a positioning double-sided bonding block (606); A buffer sealing layer (607) is filled and installed between two adjacent limiting extrusion 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), and separation ring strips (611) are equidistantly installed inside the filling cavity (610); The surface of the auxiliary fire extinguishing layer (609) is extruded and wrapped with a protective layer (612), and the surface of the protective layer (612) is sleeved with an outer heat insulation layer (613).

8. The fire-proof and anti-interference low-voltage power cable according to claim 7, characterized in that: The positioning double-sided adhesive block (606) surrounds and is in close contact with the surface of the ceramic fireproof layer (602), the metal elastic stripping piece (604) is squeezed into a curved shape, and the inner wall of the limiting extrusion ring (603) is in close contact with the arc surface of the metal elastic stripping piece (604).

9. The fire-proof and anti-interference low-voltage power cable according to claim 7, characterized in that: The diameter of the surface wall of the buffer sealing layer (607) is the same as the diameter of the surface wall of the position-limiting extrusion ring (603), the surface wall of the buffer sealing layer (607) and the surface wall of the position-limiting extrusion ring (603) are flush with each other, and the inner wall of the shaping layer (608) is in contact with the surface walls of the buffer sealing layer (607) and the position-limiting extrusion ring (603).

10. The fire-proof and anti-interference low-voltage power cable according to claim 7, characterized in that: The separation ring strip (611) divides the interior of the filling cavity (610) into a plurality of storage cavities at equal intervals. The interior of the storage cavities is filled with fire extinguishing sand. The surface wall of the outer heat insulation layer (613) is tightly fitted with the inner wall of the outer protective layer (4).

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