Smoke-suppressing and flame-retardant low-voltage cable

Abstract

The invention relates to the technical field of cables, and provides a smoke-suppression flame-retardant low-voltage cable, which comprises a plurality of wire cores, an insulating layer and a sheath, the insulating layer wraps the wire cores, the cable also comprises an isolation frame and a connector, the isolation frame is arranged in the sheath and divides the internal space of the sheath into a plurality of wire cavities, and the connector is arranged in the wire cavities. The wire core is arranged in the wire cavity, the wire cavity is filled with ceramic particles, the connector is used for connecting two sections of cables and comprises a first connecting seat, a second connecting seat, a plug socket and a connecting piece, the first connecting seat and the second connecting seat are arranged at the two ends of the outer skin respectively and connected with the outer skin and the isolation frame, and the plug socket is connected with the connector. The first connecting seat and the second connecting seat are made of flame-retardant insulating materials, the plug is arranged in the first connecting seat, and the socket is arranged in the second connecting seat. According to the technical scheme, the problems of property loss and safety accidents caused by overload heating and combustion of the low-voltage cable in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a smoke-suppressing and flame-retardant low-voltage cable. Background Art

[0002] A cable is a conductor covered with an insulating layer, a protective layer, a shielding layer, etc., used to transmit electric power or signal current or signal voltage. It can be divided into high-voltage cables and low-voltage cables according to voltage. Although low-voltage cable lines are more expensive and more difficult to lay and maintain than low-voltage overhead lines and low-voltage overhead insulated lines, they are widely used in low-voltage power distribution systems because of their reliable operation, no need for poles, no ground occupation, no obstruction of sight, and little influence from the outside world.

[0003] Low-voltage cable consists of three parts: a core, an insulation layer and a protective layer. The core is used to conduct current and is generally made of multiple copper wires or multiple aluminum wires twisted together. Low-voltage cables include single-core, double-core, three-core and four-core cables. Two-core cables are used for single-phase lines, three-core and four-core cables are used for three-phase three-wire lines and three-phase four-wire lines respectively. Single-core cables can be used in single-phase lines or three-phase lines as needed.

[0004] During the long-term use of electricity by electrical equipment, the load on the low-voltage cable will increase. In particular, when multiple high-power electrical equipment are connected at the same time, the low-voltage cable will generate heat and even burn in severe cases. Since the filling inside the cable and the insulation outside the cable are flammable, the cable will burn quickly after heating up, causing property loss and even more serious accidents. Moreover, the cable is an integrated structure. Once a fire occurs, it will involve the entire line. It is usually difficult to stop the fire in time. Therefore, we propose a smoke-suppressing and flame-retardant low-voltage cable, which can reduce the burning of the low-voltage cable, or reduce the damage caused by the cable after it burns. Summary of the invention

[0005] The invention provides a smoke-suppressing and flame-retardant low-voltage cable, which solves the problem in the prior art that the low-voltage cable is overloaded, heated and burned, causing property losses and safety accidents.

[0006] The technical solution of the present invention is as follows: A smoke-suppressing and flame-retardant low-voltage cable comprises a wire core, an insulating layer and an outer sheath, wherein the wire core is provided with a plurality of wire cores, the insulating layer is wrapped around the outside of the wire core, and further comprises: An isolation frame, the isolation frame is arranged inside the outer skin, and divides the inner space of the outer skin into a plurality of wire cavities, the wire cavities correspond to the wire cores one by one, and the wire cores are arranged inside the wire cavities; The interior of the wire cavity is filled with ceramic particles; A connector, the connector being used to connect two sections of cables, the connector comprising: A connecting seat 1 and a connecting seat 2, wherein the connecting seat 1 and the connecting seat 2 are respectively arranged at two ends of the outer skin and connected to the outer skin and the isolation frame, and the connecting seat 1 and the connecting seat 2 are made of flame-retardant insulating material; A plug and a socket, wherein the plug is arranged inside the first connection seat, and the socket is arranged inside the second connection seat, and both the plug and the socket are electrically connected to the wire core, and the plug and the socket are plug-fitted; A connecting piece, the connecting piece is used to connect the connecting seat 1 and the connecting seat 2, and the connecting piece includes: A connecting block, wherein the connecting seat 1 and the connecting seat 2 are both provided with connecting grooves, and the connecting block and the connecting grooves are in sliding fit; A fixing plate, the fixing plate is arranged inside the connecting groove, the fixing plate is in contact with the connecting block, the fixing plate is made of iron metal, and a magnet is arranged at one end of the connecting block close to the fixing plate; A locking member, which is arranged on the first connecting seat and the second connecting seat and is used to lock the connecting block, and the locking member includes: A swivel, the swivel is rotatably arranged outside the first connection seat or the second connection seat, the swivel is provided with a through hole for the connection block to pass through, and the connection block is in contact with the inner wall of the swivel; A card block, wherein a plurality of the card blocks are provided, a plurality of mounting grooves are provided on the connecting seat 1 and the connecting seat 2, the card blocks and the mounting grooves correspond one to one, the card blocks are arranged inside the mounting grooves through a compression spring and a telescopic rod, and a plurality of card slots matching the card blocks are provided on the rotating ring.

[0007] In order to reduce the spread of fire, a fire protection component is also included, and the fire protection component includes: A fireproof layer, wherein the fireproof layer is arranged outside the outer skin, the interior of the fireproof layer is arranged as a fireproof cavity, and water is contained in the fireproof cavity; A support plate, wherein a plurality of support plates are provided, wherein the support plates are arranged inside the fireproof cavity, and wherein a plurality of through holes for water to pass through are opened on the support plate.

[0008] In order to monitor the heating condition of the cable in time, a monitoring slot is provided inside the connecting seat 1, a temperature sensor is provided inside the monitoring slot, and the temperature sensor is electrically connected to an alarm.

[0009] In order to reduce the impact of external moisture or dust entering between the plug and the socket on the circuit connection, the outside of the connecting seat 1 and the connecting seat 2 are fixedly covered with sealing rings, and the two sealing rings are in contact with each other when the connecting seat 1 and the connecting seat 2 are connected.

[0010] The working principle and beneficial effects of the present invention are: 1. In the present invention, the wire cores are separated by a separator. When the heat of a wire core rises and the insulating layer burns, the separation effect of the separator reduces the impact on the remaining wire cores and the insulating layer. The wire cores and the insulating layer are supported by ceramic particles. At the same time, the ceramic particles are filled with flame retardants to prevent the burning from spreading to the outer skin. At the same time, multiple sections of low-voltage cables are connected by connectors to separate the low-voltage cables into multiple sections. The connectors are made of flame retardant materials. While ensuring the power transmission of the cable, the impact of the burning on adjacent cables is reduced, so that the fire is controlled within a limited range and the spread of the fire is reduced.

[0011] 2. In the present invention, when the insulating layer outside the wire core burns, if the fire spreads to the outer skin, if the fireproof layer burns, the water in the fireproof layer will flow out to extinguish the fire, prevent the fire from spreading further, and control the fire in time.

[0012] 3. In the present invention, the connection seat 1 and the connection seat 2 can be connected through the connection block, so as to fix the plug and the socket to realize the connection of two sections of low-voltage cables. The opening of the swivel is rotated to a position away from the connection block, and the connection block can be locked by the swivel to ensure the stability of the connection between the connection seat 1 and the connection seat 2.

[0013] 4. Therefore, compared with the low-voltage cables in the prior art, the present invention separates multiple cores in the same section of low-voltage cable through a separator, and divides the low-voltage cable into multiple sections through a connector. When the low-voltage cable burns, the fire can be controlled within a limited range to prevent the flame from quickly transmitting to the entire cable section and causing combustion. The extension of the flame in the insulation layer is reduced by filling with ceramic particles. At the same time, after the outer skin burns, the water in the fireproof layer can flow out to extinguish the fire, further reducing the spread of the fire. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 1 It is a schematic structural diagram of the first viewing angle of the entire present invention; Figure 2 It is a structural schematic diagram of the second viewing angle of the whole invention; Figure 3 It is a three-dimensional structural schematic diagram of the wire core, insulation layer, outer skin and isolation frame of the present invention; Figure 4 It is a schematic diagram of the planar structure of the cross section of the wire core, the insulating layer, the outer skin and the isolation frame of the present invention; Figure 5 It is a structural schematic diagram of the connector of the present invention; Figure 6It is a schematic diagram of the structure of the connecting block and the locking member of the present invention; Figure 7 It is a structural schematic diagram of the temperature sensor, the first connecting socket, the plug and the fixing plate of the present invention; Figure 8 It is a structural schematic diagram of the sealing ring, the second connecting seat, the socket and the card block of the present invention; Fig. 9 For the present invention Figure 5 Schematic diagram of the local enlarged structure at point A in the middle.

[0016] In the figure: 1. Wire core; 2. Insulation layer; 3. Outer skin; 4. Isolation frame; 5. Sealing ring; 6. Temperature sensor; 101, connection socket 1; 102, connection socket 2; 103, plug; 104, socket; 201, connecting block; 202, fixing plate; 203, magnet; 301, swivel; 302, clamping block; 303, compression spring; 401. Fireproof layer; 402. Support plate. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 9 As shown, this embodiment proposes a smoke-suppressing and flame-retardant low-voltage cable, including a core 1, an insulating layer 2 and a sheath 3, wherein the core 1 is provided with a plurality of cores, and the insulating layer 2 is wrapped around the outside of the core 1, and further includes an isolation frame 4 and a connector. Compared with the low-voltage cable in the prior art, the present invention separates the plurality of cores 1 in the same section of the low-voltage cable through a separation frame, and separates the low-voltage cable into multiple sections through a connector. When the low-voltage cable burns, the fire can be controlled within a limited range to prevent the flame from being quickly transmitted to the entire section of the cable and causing combustion. The extension of the flame of the insulating layer 2 is reduced by filling with ceramic particles 7. At the same time, after the sheath 3 burns, the water in the fireproof layer 401 can flow out to extinguish the fire, thereby further reducing the spread of the fire.

[0019] like Figures 1 to 4As shown, the isolation frame 4 is arranged inside the outer skin 3, and the internal space of the outer skin 3 is divided into multiple wire cavities. The wire cavities and the wire cores 1 correspond one to one. The wire cores 1 are arranged inside the wire cavities, and the wire cavities are provided with ceramic particle fillings 7. The isolation frame 4 is divergent with the center of the outer skin 3 as the center point, and separates the internal space of the outer skin 3 to separate multiple wire cores 1 from each other, so as to avoid the burning of the insulating layer 2 outside one wire core 1 and the transmission of the fire to other insulating layers 2, thereby controlling the combustion range and reducing the spread of the fire. The isolation frame 4 is made of non-flammable materials such as hard metal or fiberglass, which can support the outer skin 3 and isolate the flame at the same time. The insulating layer 2 and the wire core 1 are supported and wrapped by the ceramic particle filling 7. When the insulating layer 2 catches fire, the ceramic particle filling 7 is non-flammable. When the oxygen in the wire cavity is burned out, the fire is prevented, and the fire can be prevented from spreading outward.

[0020] like Figures 5 to 9As shown, the connector is used to connect two sections of cables. The connector includes a connection seat 101, a connection seat 102, a plug 103, a socket 104 and a connector. The connection seat 101 and the connection seat 102 are respectively arranged at the two ends of the outer skin 3 and connected to the outer skin 3 and the isolation frame 4. The material of the connection seat 101 and the connection seat 102 is a flame retardant insulating material, for example, glass fiber reinforced plastic material, ceramic material or some flame retardant fiber material can be selected. The plug 103 and the socket 104 are metal parts, which are also flame retardant. The plug 103 is arranged inside the connection seat 101, and the socket 104 is arranged inside the connection seat 102. The plug 103 and the socket 104 are both electrically connected to the core 1, and the plug 103 and the socket 104 are plug-in matched. The connection seat 1 101 and the second connection seat 102 are in contact with each other, so that the plug 103 is inserted into the inside of the socket 104, so that the two cores 1 can be electrically connected, that is, the two sections of low-voltage cables are connected. At the same time, the connection seat 101 and the second connection seat 102 separate the two sections of low-voltage cables. While ensuring that the low-voltage cable is normally energized, the flammable insulation layer 2 and the outer skin 3 are separated, so as to avoid the fire spreading to the entire cable when a section of the cable burns. The connector is used to connect the connection seat 101 and the second connection seat 102. The connector includes a connection block 201, a fixing plate 202 and a locking member. The connection seat 101 and the second connection seat 102 are both provided with a connection groove. The connection block 201 and the connection groove are slidably matched. The fixing plate 202 is set Inside the connecting groove, the fixing plate 202 is in contact with the connecting block 201. The fixing plate 202 is made of iron metal. A magnet 203 is provided at one end of the connecting block 201 close to the fixing plate 202. After the connecting seat 101 and the connecting seat 2 102 are in contact with each other, the plug 103 is inserted into the corresponding socket 104. The two connecting grooves on the connecting seat 101 and the connecting seat 2 102 correspond to each other. The connecting block 201 is installed inside the two connecting grooves. The connecting seat 101 and the connecting seat 2 102 can be limited to prevent the two from separating and disengaging. The locking member is provided on the connecting seat 101 and the connecting seat 2 102 for locking the connecting block 201. The locking member includes a swivel 301 and a block 302. The swivel 301 is rotatably provided on the connecting seat 101 and the connecting seat 2 102. 1 or the outside of the connecting seat 2 102, a through hole for the connecting block 201 to pass through is opened on the rotating ring 301, the connecting block 201 contacts the inner wall of the rotating ring 301, and a plurality of clamping blocks 302 are provided. A plurality of mounting grooves are opened on the connecting seat 1 101 and the connecting seat 2 102, and the clamping blocks 302 correspond to the mounting grooves one by one. The clamping blocks 302 are arranged inside the mounting grooves through the compression springs 303 and the telescopic rods, and a plurality of clamping grooves matching the clamping blocks 302 are opened on the rotating ring 301. When the connecting block 201 needs to be disassembled and assembled, the through hole on the rotating ring 301 is located at the connecting groove to avoid obstruction to the disassembly and assembly of the connecting block 201. When the connecting block 201 is installed inside the connecting groove, the magnet 203 and the fixing plate 202 attract each other to ensure the stability of the connecting block 201.At the same time, rotate the swivel 301 to rotate the through-port to a position away from the connecting groove, so that the swivel 301 blocks the connecting block 201 and prevents the connecting block 201 from falling out of the connecting groove, thereby ensuring the stability of the connection between the connecting seat 101 and the connecting seat 2 102. At the same time, during the rotation of the swivel 301, the clamping block 302 can be pressed into the inside of the installation groove. When it is rotated to a certain angle, that is, the angle between the two clamping blocks 302, the clamping block 302 is clamped into the inside of the other clamping groove under the action of the compression spring 303, ensuring the stability of the swivel 301, thereby preventing the swivel 301 from freely rotating until the through-port and the connecting groove correspond to each other, so that the connecting block 201 falls out. The connecting seat 101 and the connecting seat 2 102 are both provided with swivels 301. Only when the two swivels 301 are rotated at the same time to the positions of the through-port and the connecting block 201 corresponding to each other, can the connecting block 201 be moved. Take it out to ensure the stability of the connection block 201, thereby ensuring the stability of the low-voltage cable connection. A pull ring is set in the middle position of the connection block 201. There is a gap between the two rotating rings 301. The pull ring is between the gap. The connection block 201 can be taken out from the inside of the connection groove through the pull ring to contact the connection between the connection seat 1 101 and the connection seat 2 102. In order to reduce the external moisture or dust entering between the plug 103 and the socket 104 to affect the circuit connection, the outside of the connection seat 1 101 and the connection seat 2 102 are fixedly sleeved with a sealing ring 5. When the connection seat 1 101 and the connection seat 2 102 are connected, the two sealing rings 5 ​​contact each other. The gap between the connection seat 1 101 and the connection seat 2 102 is sealed by the sealing ring 5 to prevent the external moisture from entering and causing a short circuit or corrosion and aging between the plug 103 and the socket 104, thereby ensuring the stability of the cable connection.

[0021] like Figures 1 to 4 As shown, in order to reduce the spread of fire, a fireproof component is also included. The fireproof component includes a fireproof layer 401 and a support plate 402. The fireproof layer 401 is arranged on the outside of the outer skin 3, and the interior of the fireproof layer 401 is arranged as a fireproof cavity. Water is contained in the fireproof cavity. A plurality of support plates 402 are provided. The support plates 402 are arranged inside the fireproof cavity. A plurality of through holes for water to pass through are opened on the support plate 402. The fireproof layer 401 can use the same material as the outer skin 3, that is, PVC or PE. When the flame penetrates the ceramic particles to burn the outer skin 3, the inner layer of the fireproof layer 401 will also burn. The water in the fireproof cavity flows out, and the burning fireproof layer 401, the outer skin 3 and the insulating layer 2 can be extinguished to prevent the fire from spreading outward.

[0022] like Figure 2 and Figure 7As shown, in order to monitor the heating condition of the cable in time, a monitoring slot is opened inside the connecting seat 101, and a temperature sensor 6 is arranged inside the monitoring slot. The temperature sensor 6 is electrically connected to an alarm. The temperature at the connecting seat 101 is monitored by the temperature sensor 6, or in other words, the temperature of the low-voltage cable is monitored. When the temperature of the cable rises after long-term use, or the cable burns, the temperature of the connecting seat 101 will be caused to rise, which will be sensed by the temperature sensor 6. The temperature sensor 6 transmits an electrical signal to the alarm, causing the alarm to sound an alarm, reminding the staff to deal with it in time.

[0023] The working principle or use process of the smoke suppression and flame retardant low-voltage cable is as follows: Select a suitable number of low-voltage cables, connect them with connectors, make the total length of the low-voltage cables meet the requirements, bring the connection seat 101 and the connection seat 2 102 close to each other, insert the plug 103 into the corresponding socket 104, the position of the connection slot corresponds, and insert the connection block 201 into the connection slot. Under the mutual attraction of the magnet 203 and the fixing plate 202, the connection block 201 is fixed inside the connection slot. The connection block 201 limits the connection seat 101 and the connection seat 2 102, and then rotate the swivel 301 to rotate the port to a position away from the connection slot. The swivel 301 limits the connection block 201. Under the action of the clamping spring 303, the clamping block 302 is pushed into the inside of the clamping slot, and the clamping block 302 limits the swivel 301. If the low-voltage cable is in a high-temperature state or burning, the temperature sensor 6 can sense the temperature increase and send an electrical signal to the alarm, causing the alarm to sound, reminding the staff to deal with it in time, and the isolation frame 4 isolates multiple cores 1. At the same time, the connecting seat 101 and the connecting seat 2 102 separate multiple sections of low-voltage cables to prevent the spread of fire. When the flame burns to the outer skin 3 and the fireproof layer 401, the water in the fireproof layer 401 flows out to extinguish the flame and prevent the fire from spreading further.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smoke-suppressing and flame-retardant low-voltage cable, comprising a core (1), an insulating layer (2) and an outer sheath (3), wherein the core (1) is provided with a plurality of insulating layers (2) wrapped around the outside of the core (1), characterized in that: Also includes: an isolation frame (4), the isolation frame (4) being arranged inside the outer skin (3) to divide the inner space of the outer skin (3) into a plurality of wire cavities, the wire cavities corresponding to the wire cores (1) one by one, and the wire cores (1) being arranged inside the wire cavities; The interior of the guide wire cavity is filled with ceramic particles (7); A connector, the connector being used to connect two sections of cables, the connector comprising: A connecting seat 1 (101) and a connecting seat 2 (102), wherein the connecting seat 1 (101) and the connecting seat 2 (102) are respectively arranged at two ends of the outer skin (3) and connected to the outer skin (3) and the isolation frame (4), and the connecting seat 1 (101) and the connecting seat 2 (102) are made of flame-retardant insulating material; A plug (103) and a socket (104), wherein the plug (103) is arranged inside the first connection seat (101), and the socket (104) is arranged inside the second connection seat (102), the plug (103) and the socket (104) are both electrically connected to the wire core (1), and the plug (103) and the socket (104) are plug-fitted; A connecting piece, the connecting piece is used to connect the connecting seat 1 (101) and the connecting seat 2 (102).

2. The smoke-suppressing and flame-retardant low-voltage cable according to claim 1, characterized in that: The connecting piece comprises: A connecting block (201), the connecting seat 1 (101) and the connecting seat 2 (102) are both provided with connecting grooves, and the connecting block (201) and the connecting grooves are in sliding fit; A fixing plate (202), the fixing plate (202) being arranged inside the connecting groove, the fixing plate (202) being in contact with the connecting block (201), the fixing plate (202) being made of iron metal, and a magnet (203) being arranged at one end of the connecting block (201) close to the fixing plate (202); A locking piece, the locking piece is arranged on the first connecting seat (101) and the second connecting seat (102), and is used to lock the connecting block (201).

3. The smoke-suppressing and flame-retardant low-voltage cable according to claim 2, characterized in that: The locking member comprises: a rotating ring (301), the rotating ring (301) being rotatably arranged outside the first connecting seat (101) or the second connecting seat (102), the rotating ring (301) being provided with a through hole for the connecting block (201) to pass through, the connecting block (201) being in contact with an inner wall of the rotating ring (301); A clamping block (302), wherein a plurality of clamping blocks (302) are provided, a plurality of mounting grooves are provided on the first connecting seat (101) and the second connecting seat (102), the clamping blocks (302) and the mounting grooves correspond one to one, the clamping blocks (302) are arranged inside the mounting grooves via a compression spring (303) and a telescopic rod, and a plurality of clamping grooves matching the clamping blocks (302) are provided on the rotating ring (301).

4. The smoke-suppressing and flame-retardant low-voltage cable according to claim 3, characterized in that: Also included is a fire protection assembly, the fire protection assembly comprising: A fireproof layer (401), the fireproof layer (401) being arranged outside the outer skin (3), the interior of the fireproof layer (401) being arranged as a fireproof cavity, and the interior of the fireproof cavity containing water; A support plate (402), wherein a plurality of the support plates (402) are provided, the support plates (402) are arranged inside the fireproof cavity, and the support plates (402) are provided with a plurality of through holes for water to pass through.

5. The smoke-suppressing and flame-retardant low-voltage cable according to claim 4, characterized in that: A monitoring slot is provided inside the first connection seat (101), a temperature sensor (6) is provided inside the monitoring slot, and the temperature sensor (6) is electrically connected to an alarm.

6. The smoke-suppressing and flame-retardant low-voltage cable according to claim 5, characterized in that: The outsides of the connection seat 1 (101) and the connection seat 2 (102) are both fixedly sleeved with sealing rings (5); when the connection seat 1 (101) and the connection seat 2 (102) are connected, the two sealing rings (5) are in contact with each other.

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