Integrated manufacturing equipment for fire protection cables

Abstract

This invention provides a fire-resistant electric wire and a method for manufacturing the same that significantly improve fire resistance compared to conventional electric wires. [Solution] The fire-resistant electric wire includes a copper conductor 1201 and a double-fired mica tape 1203. The surface of the copper conductor is coated with a high-temperature resistant fire-resistant film 1202, which is composed of a two-component high-temperature resistant insulating ceramic paint. The double-fired mica tape is wound around the copper conductor coated with the high-temperature resistant fire-resistant film with a 50% overlap. The manufacturing method involves blending an organic silicone resin, a composite system of inorganic potassium silicate / lithium silicate, and special additives, curing the mixture, forming a ceramic protective layer, and then double-winding the double-fired mica tape with a 50% overlap, thereby improving the fire resistance of the electric wire from the conventional 750°C for 90 minutes to 950°C for 180 minutes.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-resistant electric wires, and more specifically, to fire-resistant electric wires and a manufacturing method thereof.

Background Art

[0002] Currently, in the field of fire-resistant electric wires, mainly the GB / T19216.21-2003 standard is adopted, and the core test requirement is to maintain power supply while continuously burning at a temperature of 750°C for 90 minutes. However, the fire environment of modern buildings presents the following new characteristics. The temperature at the fire scene generally reaches 900 - 1100°C (according to the research report of the National Fire Protection Association NFPA in the United States), the evacuation time of high-rise buildings takes 120 - 180 minutes (refer to the GB50016-2014 standard), the proportion of electrical fires exceeds 35% (according to the data of the China Fire Yearbook 2022), and there are obvious drawbacks in the traditional structure (copper conductor + double mica + polyolefin). For example, normal mica tape peels off between layers at a temperature of 800°C or higher (confirmed by SEM microscope observation), and single-component fireproof paint is prone to cracking (the difference in thermal expansion coefficient reaches 8.7x10 -6 / °C).

[0003] In view of the insufficient fireproof effect or fire-resistant effect of conventional fire-resistant electric wires and the inability to meet the current disaster response requirements such as fire fighting activities and rescue activities, the inventors propose a fire-resistant electric wire and a manufacturing method thereof.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention is to provide a fire-resistant electric wire and a manufacturing method thereof that solve the technical problem of insufficient fireproof performance of fire-resistant electric wires.

[0005] To solve the above technical problems, the present invention provides the following technical solution. The fireproof wire comprises a copper conductor, a double-fired mica tape, and an outer layer of low-smoke, halogen-free polyolefin sheath. The surface of the copper conductor is coated with a high-temperature resistant fireproof film, which is composed of a two-component high-temperature resistant insulating ceramic paint. The double-fired mica tape is wound around the copper conductor coated with the high-temperature resistant fireproof film with a 50% overlap ratio, and the outer layer of low-smoke, halogen-free polyolefin sheath covers the outer surface of the double-fired mica tape. Here, the high-temperature resistant fireproof film comprises a composite of organic silicone resin, inorganic potassium silicate, and inorganic lithium silicate.

[0006] In this invention, an organic silicone resin, a composite system of inorganic potassium silicate / lithium silicate, and special additives are blended and cured to form a ceramic protective layer, and then a fired mica tape is double-wound with a 50% overlap ratio. This improves the fire resistance of the electric wire from the conventional 750°C for 90 minutes to 950°C for 180 minutes, significantly improving fire prevention and fire resistance compared to conventional electric wires. In the event of a fire, the integrity of the circuit and stable power supply can be maintained for a long period of time, securing valuable time for firefighting, rescue, and emergency operation of equipment.

[0007] A method for manufacturing fire-resistant electric wires is realized by an integrated manufacturing apparatus. The integrated manufacturing apparatus includes a winding machine, a drying and coating integrated unit installed at the output end of the winding machine, and a mica winding mechanism installed at the output end of the drying and coating integrated unit. Here, a tensioning mechanism is installed at the output end of the mica winding mechanism, and a sheath extrusion mechanism used for extruding a low-smoke, halogen-free polyolefin sheath for covering the surface of the fire-resistant electric wire is installed on one side of the tensioning mechanism, the drying and coating integrated unit includes an integrated frame on which a double-sided coating tank is installed, bidirectional drive mechanisms are symmetrically installed on both sides of the double-sided coating tank, the bidirectional drive mechanisms are kinetically connected via a power output mechanism, and a quartz lamp unit is installed above the double-sided coating tank between the two opposing bidirectional drive mechanisms.

[0008] Preferably, the bidirectional drive mechanism includes two sets of stacked fixed seats, with eight fixed seats positioned on both sides of the integrated frame. Of these, four fixed seats located at the lower end are arranged coaxially in pairs, and a key shaft is fixedly installed between the two coaxially positioned fixed seats at the lower end, to which an anti-sway rotating frame is key-coupled.

[0009] Preferably, the four fixed seats located at the upper end are arranged coaxially in pairs, and a synchronous meshing shaft cover having an arc-shaped cross-section is fixedly installed between the two fixed seats located at the upper end that are arranged coaxially, and a plurality of extrusion teeth are installed on the surface of the synchronous meshing shaft cover, at least along the axial direction of the fixed seats, and a rotating ratchet shaft member is installed coaxially outside the synchronous meshing shaft cover, and a plurality of helical grooves that engage with the extrusion teeth are installed on the inner wall of the rotating ratchet shaft member, and a plurality of ratchet teeth are rotatably installed on the outer surface of the rotating ratchet shaft member, and the ratchet teeth are elastically connected to the rotating ratchet shaft member, and a one-way drive wheel rotatably connected to the anti-sway rotating frame is installed on the outer surface of the rotating ratchet shaft member, and a ratchet groove is formed by the gap in the inner wall of the one-way drive wheel. Here, the one-way drive wheel, together with the rotating ratchet shaft member, constitutes a ratchet structure by the ratchet groove and ratchet teeth.

[0010] Preferably, a reciprocating drive shaft is installed at the axial position of the synchronous meshing shaft cover, two sets of helical drive grooves are installed on the surface of the reciprocating drive shaft, the ends of which are connected, a synchronous wheel A for power input is installed at the end of the reciprocating drive shaft, two positioning shafts are rotatably installed at both ends of the reciprocating drive shaft, a drive sleeve is installed on the outside of the reciprocating drive shaft, the drive sleeve and the two positioning shafts are key-coupled, a meshing wedge is rotatably installed on the inner wall of the drive sleeve, and arc-shaped connecting members fixedly connected to the anti-sway rotating frame are installed on both sides of the lower end of the drive sleeve.

[0011] Preferably, a positioning groove A is provided on the surface of the unidirectional drive wheel closest to the unwinding machine, and a unidirectional drive wheel further away from the unwinding machine has a different diameter structure and a positioning groove B is provided on its surface, the positioning groove B includes a plurality of connecting grooves A and at least one misalignment groove, and the positioning grooves A and B are arranged alternately.

[0012] Preferably, copper conductors are wound around the surfaces of the two unidirectional drive wheels in a three-dimensional figure-eight shape.

[0013] Preferably, the power output mechanism includes a drive motor installed on the upper part of the double-sided coating tank, a synchronous wheel B is installed at the output end of the drive motor, and the reciprocating drive shaft, together with the synchronous wheel A, the synchronous wheel B, the synchronous belt, and the drive motor, constitutes a transmission structure.

[0014] Preferably, a comb-shaped repulsive plate is fixedly installed on the inner wall of the double-sided coating tank, a plurality of repulsive grooves are installed at the end of the repulsive plate, and the edges of the repulsive grooves 5011 are chamfered, and as the copper conductor moves along the axial direction of the reciprocating drive shaft, the copper conductor comes into movable contact with the repulsive grooves to form a repulsive structure, and the coating deposited on the surface of the inclined copper conductor is removed by vibration.

[0015] The method for manufacturing fire-resistant electrical wires includes the following steps: S100: Drawing of copper conductors; drawing 8mm diameter copper rods to standard specifications. S200: Coating and drying process; The unwinding machine appropriately performs intermittent unwinding and works in cooperation with the winding device to perform winding at a uniform speed. In the extraction of the copper conductor, the copper conductor is wound in a three-dimensional "8" shape and placed on two unidirectional drive wheels, and its position is restricted by positioning groove A, connecting groove A and misalignment groove. Next, power is input from the power output mechanism to rotate the reciprocating drive shaft, causing the meshing wedge to reciprocate along the helical drive groove and move the drive sleeve to opposite sides. In addition, the arc-shaped connecting member and the rotating ratchet shaft member are rotated in sync with the movement of the drive sleeve. The helical groove installed in the shaft member of the rotating ratchet contacts the extrusion teeth to form a cam structure. When the ratchet is meshed, rotating the unidirectional drive wheel causes the unidirectional drive wheel to rotate intermittently in one direction, resulting in the copper conductor reciprocating to both sides. As a result, the copper conductor is intermittently reversed and transported while wound in a three-dimensional figure-eight shape. When it is located at the bottom of the unidirectional drive wheel, paint is applied, and when it moves diagonally above the unidirectional drive wheel, it dries and hardens. S300: Mica winding; a bidirectional automatic adjustment mica winding mechanism winds double-baked mica tape with a 50% overlap ratio. S400: After sheath extrusion and tension application, the sheath is coated with a low-smoke, halogen-free polyolefin sheath using an 80-type extruder.

[0016] Compared to the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In this invention, an organic silicone resin, a composite system of inorganic potassium silicate / lithium silicate, and special additives are blended and cured to form a ceramic protective layer, and then a fired mica tape is double-wound with a 50% overlap ratio. This improves the fire resistance of the electric wire from the conventional 750°C for 90 minutes to 950°C for 180 minutes, significantly improving the fire prevention and fire resistance effect compared to conventional electric wires. In the event of a fire, the integrity of the circuit and stable power supply can be maintained for a long period of time, securing valuable time for firefighting, rescue, and emergency operation of equipment.

[0018] 2. In this invention, a bidirectional drive mechanism and a quartz lamp unit positioned opposite each other between the bidirectional drive mechanisms enable the reciprocating application of the fire-resistant coating, and a single quartz lamp unit performs the necessary coating drying and curing operations multiple times. This effectively reduces the large manufacturing site required for conventional single-strand fire-resistant wire manufacturing lines, optimizing the site area for small and medium-sized wire manufacturing industries.

[0019] 3. In this invention, the key coupling relationship between the anti-sway rotating frame and the key shaft provides the support necessary for the operation of the bidirectional drive mechanism and avoids interference caused by the movement of other moving members of the bidirectional drive mechanism.

[0020] 4. In the present invention, the unidirectional drive wheel, together with the rotating ratchet shaft member, forms a ratchet structure with ratchet grooves and ratchet teeth, causing the unidirectional drive wheel to rotate only in one direction. This rotation achieves frictionless close contact between the copper conductor and the unidirectional drive wheel, reducing wear on the copper conductor. Furthermore, unidirectional rotation, i.e., intermittent rotation, avoids reverse flow and transport of the copper conductor due to reverse rotation.

[0021] 5. In this invention, the action of the interlocking wedge causes the reciprocating drive shaft to rotate in only one direction, and two sets of helical drive grooves, whose ends are connected, are provided on the surface of the reciprocating drive shaft. This provides the effect of the anti-oscillation rotating frame and some of the components scraping the coating liquid phase from side to side. As a result, the hardening of the upper surface of the coating liquid phase and the formation of a film, which occurs when the quartz lamp unit is placed in the coating liquid phase and adheres to the surface of the copper conductor, is effectively reduced, thereby improving yield.

[0022] 6. In the present invention, by setting the unidirectional drive wheel, which is located away from the unwinding machine, to have a different diameter structure, a dimensional difference is created between the positioning groove B and the connecting groove A located at the end with the smaller diameter. By controlling the liquid level of the coating liquid, only the portion of the connecting groove A with the larger diameter is brought into contact with the coating liquid. This effectively controls the required number of coating applications and prevents the occurrence of excessive coating thickness caused by the operation of the device.

[0023] 7. In the present invention, by installing a copper conductor wound around the two one-direction drive wheels in a three-dimensional figure-eight shape, a displacement effect is achieved. As a result, with only a single quartz lamp unit, the required drying and curing can be performed multiple times, without requiring an overly long production line.

[0024] 8. In the present invention, by installing a copper conductor wound in a three-dimensional figure-eight shape, it becomes difficult to tension the copper conductor with a tension like conventional manufacturing equipment during the manufacturing process to hold the electric wire horizontally. By winding in such a three-dimensional figure-eight shape, there is a problem that an excess portion of the uncured coating liquid phase tends to stay and accumulate in the inclined section of the copper conductor, easily causing a locally thick coating film during curing. However, by installing a flapping groove and operating the copper conductor on both sides of the one-direction drive wheel, a flapping effect (a plucking effect by vibration) like plucking a string is achieved. As a result, excess coating liquid can be dropped off by vibration.

Brief Description of the Drawings

[0025] [Figure 1] It is a schematic diagram showing the overall three-dimensional structure of the present invention. [Figure 2] It is a schematic diagram showing the three-dimensional structure of the drying and coating integrated unit of the present invention. [Figure 3] It is a schematic diagram showing the three-dimensional structure of the cross-section of the double-sided coating tank of the present invention. [Figure 4] It is a schematic diagram showing the three-dimensional structure of the power output mechanism of the present invention. [Figure 5] It is a schematic diagram showing the internal structure of the bidirectional drive mechanism of the present invention. [Figure 6] It is a schematic diagram showing the exploded three-dimensional structure of the bidirectional drive mechanism of the present invention. [Figure 7] It is a schematic diagram showing the top view structure of the bidirectional drive mechanism of the present invention. <00XXXXX> [Figure 8] It is an enlarged view showing the local structure of part B of FIG. 7 of the present invention. [Figure 9] It is a schematic diagram showing the local structure of part C of FIG. 7 of the present invention. [Figure 10] It is a schematic diagram showing the local structure of part A of FIG. 3 of the present invention. [Figure 11] This is a schematic diagram showing the cross-sectional structure of the fire-resistant electric wire of the present invention. [Modes for carrying out the invention]

[0026] As shown in Figure 11, the fireproof wire according to the present invention comprises a copper conductor, a double-fired mica tape, and an outer layer of low-smoke, halogen-free polyolefin sheath. The surface of the copper conductor is coated with a high-temperature resistant fireproof film, which is composed of a two-component high-temperature resistant insulating ceramic paint. The double-fired mica tape is wound around the copper conductor coated with the high-temperature resistant fireproof film with a 50% overlap ratio, and the outer layer of low-smoke, halogen-free polyolefin sheath covers the outer surface of the double-fired mica tape. Here, the high-temperature resistant fireproof film comprises a composite of organic silicone resin, inorganic potassium silicate, and inorganic lithium silicate. In this invention, an organic silicone resin, a composite system of inorganic potassium silicate / lithium silicate, and special additives are blended and cured to form a ceramic protective layer, and then a fired mica tape is double-wound with a 50% overlap ratio. This improves the fire resistance of the electric wire from the conventional 750°C for 90 minutes to 950°C for 180 minutes, significantly improving the fire prevention and fire resistance compared to conventional electric wires. In the event of a fire, the integrity of the circuit and stable power supply can be maintained for a long period of time, securing valuable time for firefighting activities and emergency operation of equipment.

[0027] As shown in Figures 1 to 10, the method for manufacturing fire-resistant electric wires according to the present invention is realized by an integrated manufacturing apparatus. The integrated manufacturing apparatus includes a winding machine 1, a drying and coating integrated unit 2 installed at the output end of the winding machine 1, and a mica winding mechanism 3 installed at the output end of the drying and coating integrated unit 2. Here, a tensioning mechanism is installed at the output end of the mica winding mechanism 3, and a sheath extrusion mechanism used for extruding a low-smoke, halogen-free polyolefin sheath, which covers the surface of the fire-resistant electric wire, is installed on one side of the tensioning mechanism. The drying and coating integrated unit 2 includes an integrated frame 4 on which a double-sided coating tank 5 is installed, and bidirectional drive mechanisms 6 are symmetrically installed on both sides of the double-sided coating tank 5, the bidirectional drive mechanisms 6 are kinetically connected via a power output mechanism 7, and a quartz lamp unit 8 is installed above the double-sided coating tank 5 between the two opposing bidirectional drive mechanisms 6. In this invention, a bidirectional drive mechanism 6 and a quartz lamp unit positioned opposite each other between the bidirectional drive mechanisms 6 enable the reciprocating application of the fire-resistant coating, and a single quartz lamp unit performs the necessary coating drying and curing operations multiple times. This effectively reduces the large manufacturing area required for conventional single-strand fire-resistant wire production lines, optimizing the site area for small and medium-sized wire manufacturing industries.

[0028] In embodiments of the present invention, the bidirectional drive mechanism 6 includes two sets of stacked fixed seats 601, with eight fixed seats 601 positioned on both sides of the integrated frame 4. Of these, four fixed seats 601 located at the lower end are arranged coaxially in pairs, and a key shaft 602 is fixedly installed between the two coaxially positioned fixed seats 601 at the lower end, with an anti-sway rotating frame 603 key-coupled to the key shaft 602. In the present invention, the key coupling relationship between the anti-sway rotating frame 603 and the key shaft 602 provides the support necessary for the operation of the bidirectional drive mechanism 6 and avoids interference caused by the movement of other moving members of the bidirectional drive mechanism 6.

[0029] In an embodiment of the present invention, four fixed seats 601 located at the upper end are arranged coaxially in pairs, and a synchronous meshing shaft cover 604 having an arc-shaped cross-section is fixedly installed between two of the coaxially arranged fixed seats 601 located at the upper end, and a plurality of extrusion teeth 6041 are installed on the surface of the synchronous meshing shaft cover 604 at least along the axial direction of the fixed seats 601, and a rotary ratchet shaft member 605 is installed coaxially outside the synchronous meshing shaft cover 604. Of these, the inner wall of the rotating ratchet shaft member 605 has multiple helical grooves 6051 that engage with the extrusion teeth 6041, and the outer surface of the rotating ratchet shaft member 605 has multiple ratchet teeth 606 that are rotatably mounted and elastically connected to the rotating ratchet shaft member 605. A one-way drive wheel 607 that is rotatably connected to the anti-sway rotating frame 603 is mounted on the outer surface of the rotating ratchet shaft member 605, and a ratchet groove is formed by the gap in the inner wall of the one-way drive wheel 607. Here, the one-way drive wheel 607, together with the rotating ratchet shaft member 605, constitutes a ratchet structure through the ratchet groove and ratchet teeth 606. In this invention, the unidirectional drive wheel 607, together with the rotating ratchet shaft member 605, forms a ratchet structure with ratchet grooves and ratchet teeth 606, causing the unidirectional drive wheel 607 to rotate only in one direction. This rotation achieves frictionless close contact between the copper conductor and the unidirectional drive wheel 607, reducing wear on the copper conductor. Furthermore, unidirectional rotation, i.e., intermittent rotation, avoids reverse flow and transport of the copper conductor due to reverse rotation.

[0030] In this embodiment of the present invention, a reciprocating drive shaft 608 is installed at the axial position of the synchronous meshing shaft cover 604. Two sets of helical drive grooves 6081, whose ends are connected to each other, are installed on the surface of the reciprocating drive shaft 608. A synchronous wheel A for power input is installed at the end of the reciprocating drive shaft 608. Two positioning shafts 609 are rotatably installed at both ends of the reciprocating drive shaft 608. A drive sleeve 6014 covers the outside of the reciprocating drive shaft 608, and the drive sleeve 6014 and the two positioning shafts 609 are key-coupled. A meshing wedge 6010 is rotatably installed on the inner wall of the drive sleeve 6014. Arc-shaped connecting members 6011, which are fixedly connected to an anti-sway rotating frame 603, are installed on both sides of the lower end of the drive sleeve 6014. In this invention, the action of the interlocking wedge 6010 causes the reciprocating drive shaft 608 to rotate in only one direction, and two sets of helical drive grooves 6081, whose ends are connected, are provided on the surface of the reciprocating drive shaft 608. This allows the anti-oscillation rotating frame 603 and some of its components to effectively abrade the coating liquid phase from side to side. As a result, the hardening of the upper surface of the coating liquid phase and the formation of a film due to the placement of the quartz lamp unit 8 in the coating liquid phase, which adheres to the surface of the copper conductor, can be effectively reduced, thereby improving yield.

[0031] In the embodiment of the present invention, a positioning groove A is provided on the surface of a unidirectional drive wheel 607 close to the unwinding machine 1, while a unidirectional drive wheel 607 further away from the unwinding machine 1 has a different diameter structure, and a positioning groove B is provided on its surface. The positioning groove B includes a plurality of connecting grooves A and at least one misalignment groove, and the positioning grooves A and B are arranged alternately. As shown in Figures 5 and 9, in the present invention, by setting the unidirectional drive wheel 607 further away from the unwinding machine 1 to have a different diameter structure, a dimensional difference is created between the positioning groove B and the connecting groove A located at the smaller diameter end, and by controlling the liquid level of the coating liquid, only the portion of the larger diameter connecting groove A is brought into contact with the coating liquid. This effectively controls the required number of coating applications and prevents the occurrence of excessive coating thickness due to the operation of the device.

[0032] In the embodiment of the present invention, copper conductors are wound around the surfaces of the two unidirectional drive wheels 607 in a three-dimensional figure-eight shape. In the present invention, a misalignment effect is achieved by winding the copper conductors around the two unidirectional drive wheels 607 in a three-dimensional figure-eight shape. As a result, the required drying and curing can be performed multiple times with only a single quartz lamp unit 8, eliminating the need for an excessively long manufacturing line.

[0033] In this embodiment of the present invention, the power output mechanism 7 includes a drive motor 701 installed on the upper part of the double-sided coating tank 5, a synchronous wheel B is installed at the output end of the drive motor 701, and the reciprocating drive shaft 608, together with the drive motor 701, constitutes a transmission structure with the synchronous wheel A, the synchronous wheel B, and the synchronous belt.

[0034] In this embodiment of the present invention, a comb-shaped repulsive plate 501 is fixedly installed on the inner wall of the double-sided coating tank 5, and a plurality of repulsive grooves 5011 are installed at the end of the repulsive plate 501, and the edges of the repulsive grooves 5011 are chamfered, and as the copper conductor moves along the axial direction of the reciprocating drive shaft 608, the copper conductor makes movable contact with the repulsive grooves 5011 to form a repulsive structure, and the coating deposited on the surface of the inclined copper conductor is removed by vibration. In this invention, the installation of the copper conductor wound in a three-dimensional "8" shape makes it difficult to tension the copper conductor with tension during the manufacturing process and hold the wire horizontally as in conventional manufacturing equipment. While winding the coating in this three-dimensional figure-eight shape can cause excess uncured coating liquid to accumulate and deposit in the inclined sections of the copper conductor, leading to localized over-thickness during curing, a repulsive groove is installed to move the copper conductor on both sides of the unidirectional drive wheel, achieving a repulsive effect (vibration-induced plucking effect) similar to plucking a string. This allows excess coating liquid to be removed by vibration.

[0035] Operating principle: The method for manufacturing fire-resistant electric wires according to this application includes the following steps. S100: Drawing of copper conductors; drawing 8mm diameter copper rods to standard specifications. S200: Coating and drying process; The unwinding machine 1 appropriately performs intermittent unwinding and works in cooperation with the winding device to perform winding at a uniform speed. In the extraction of the copper conductor, the copper conductor is wound in a three-dimensional "8" shape and placed on two unidirectional drive wheels 607, and its position is restricted by the positioning groove A, connecting groove A and misalignment groove. Next, power is input from the power output mechanism 7 to rotate the reciprocating drive shaft 608, causing the meshing wedge 6010 to reciprocate along the helical drive groove 6081, and moving the drive sleeve 6014 to opposite sides. Furthermore, the arc-shaped connecting member 6011 and the rotating ratchet shaft member 605 rotate in sync with the movement of the drive sleeve 6014. The helical groove installed inside the rotating ratchet shaft member 605 contacts the extrusion teeth 6041 to form a cam structure. When the ratchet is engaged, the unidirectional drive wheel 607 rotates intermittently in one direction, causing the copper conductor to reciprocate back and forth. As a result, the copper conductor is intermittently reversed and transported in a three-dimensional figure-eight shape. When it is located at the bottom of the unidirectional drive wheel 607, paint is applied, and when it moves diagonally over the top of the unidirectional drive wheel 607, drying and hardening occur. S300: Mica winding; The bidirectional automatic adjustment mica winding mechanism 3 winds the double-baked mica tape with a 50% overlap ratio. S400: After sheath extrusion and tension application, a low-smoke, halogen-free polyolefin sheath is coated using an 80-type extruder.

[0036] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art will readily understand the spirit of the invention based on the above embodiments and can perform various substitutions and modifications, which, as long as they do not deviate from the spirit of the invention, also fall within the scope of the invention. [Explanation of Symbols]

[0037] 1 Unwinder 2. Drying and coating integrated unit 3. Mica winding mechanism 4. Integrated frame 5. Double-sided coating tank 6. Bidirectional drive mechanism 7 Power output mechanism 501 Repellent plate 5011 Repulsion groove 601 Fixed seat 602 key switches 603 Anti-sway rotating frame 604 Synchronized meshing shaft cover 6041 Extruder teeth 605 Rotating ratchet shaft member 6051 Spiral groove 606 Ratchet Teeth 607 One-way drive wheels 608 Reciprocating drive shaft 6081 Helical drive groove 6010 Interlocking wedge 6014 Drive Sleeve 6011 Arc-shaped connecting member 701 Drive motor 1201 Copper conductor 1202 High temperature resistant fireproof coating 1203 Double-fired mica tape 1204 Outer layer low smoke halogen-free polyolefin sheath

Claims

1. A fire protection cable integrated manufacturing apparatus, The device is equipped with a winding machine (1), a drying and coating integrated unit (2) installed at the output end of the winding machine (1), a mica winding mechanism (3) installed at the output end of the drying and coating integrated unit (2), a tensioning mechanism installed at the output end of the mica winding mechanism (3), and a sheath extrusion mechanism used for extruding a low-smoke, halogen-free polyolefin sheath for covering the surface of a fire-resistant electric wire, on one side of the tensioning mechanism. The drying and coating integrated unit (2) includes an integrated frame (4) on which a double-sided coating tank (5) is installed. Bidirectional drive mechanisms (6) are symmetrically installed on both sides of the double-sided coating tank (5), and the bidirectional drive mechanisms (6) are kinetically connected via a power output mechanism (7). A quartz lamp unit (8) is installed between two opposing bidirectional drive mechanisms (6) at the top of the double-sided coating tank (5). The bidirectional drive mechanism (6) includes two sets of fixed seats (601) arranged in a stacked manner, and eight of the fixed seats (601) are arranged on both sides of the integrated frame (4). Of these, the four fixed seats (601) located at the lower end are arranged coaxially in pairs. A key shaft (602) is fixedly installed between the two fixed seats (601) located at the lower ends, which are arranged coaxially, and an anti-sway rotating frame (603) is key-coupled to the key shaft (602). The four fixed seats (601) located at the upper end are arranged coaxially in pairs, and a synchronous meshing shaft cover (604) having an arc-shaped cross-section is fixedly installed between the two fixed seats (601) located at the upper end that are arranged coaxially. Multiple extrusion teeth (6041) are provided on the surface of the synchronous meshing shaft cover (604) at least along the axial direction of the fixed seat (601), A rotary ratchet shaft member (605) is coaxially mounted outside the aforementioned synchronous meshing shaft cover (604). Of these, the inner wall of the rotating ratchet shaft member (605) is provided with multiple helical grooves (6051) that engage with the extrusion teeth (6041). Multiple ratchet teeth (606) are rotatably mounted on the outer surface of the rotating ratchet shaft member (605), and the ratchet teeth (606) are elastically connected to the rotating ratchet shaft member (605). A one-way drive wheel (607) is installed on the outer surface of the rotating ratchet shaft member (605), which is rotatably connected to the anti-sway rotating frame (603). A ratchet groove is formed by the gap in the inner wall of the one-way drive wheel (607), and together with the rotating ratchet shaft member (605), the ratchet groove and ratchet teeth (606) of the one-way drive wheel (607) constitute a ratchet structure, thereby rotating the one-way drive wheel (607) in only one direction, and achieving close contact between the copper conductor and the one-way drive wheel (607) through rotation, in a fire-resistant electric wire integrated manufacturing apparatus.

2. A reciprocating drive shaft (608) is installed at the axial position of the synchronous meshing shaft cover (604), and two sets of helical drive grooves (6081) are installed on the surface of the reciprocating drive shaft (608) to connect their ends, and a synchronous wheel A for power input is installed at the end of the reciprocating drive shaft (608). Two positioning shafts (609) are rotatably mounted at both ends of the reciprocating drive shaft (608), a drive sleeve (6014) is fitted over the outside of the reciprocating drive shaft (608), and the drive sleeve (6014) and the two positioning shafts (609) are key-coupled. The fire-resistant electric wire integrated manufacturing apparatus according to claim 1, characterized in that a meshing wedge (6010) is rotatably installed on the inner wall of the drive sleeve (6014), and arc-shaped connecting members (6011) fixedly connected to the anti-sway rotating frame (603) are installed on both sides of the lower end of the drive sleeve (6014).

3. A positioning groove A is provided on the surface of the unidirectional drive wheel (607) closest to the unwinding machine (1), and a positioning groove B is provided on the surface of the unidirectional drive wheel (607) further away from the unwinding machine (1). The positioning groove B includes a plurality of connecting grooves A and at least one misalignment groove, The integrated fire protection wire manufacturing apparatus according to claim 2, characterized in that the positioning grooves A and B are arranged alternately.

4. The fire-prevention electric wire integrated manufacturing apparatus according to claim 3, characterized in that copper conductors are wound in a three-dimensional figure-eight shape on the surfaces of the two unidirectional drive wheels (607).

5. The integrated fire protection wire manufacturing apparatus according to claim 4, characterized in that the power output mechanism (7) includes a drive motor (701) installed on the upper part of the double-sided coating tank (5), a synchronous wheel B is installed at the output end of the drive motor (701), and the reciprocating drive shaft (608) together with the drive motor (701) constitutes a transmission structure by synchronous wheel A, synchronous wheel B, and a synchronous belt.

6. A comb-shaped repulsive plate (501) is fixedly installed on the inner wall of the double-sided coating tank (5), and a plurality of repulsive grooves (5011) are installed at the end of the repulsive plate (501), and as the copper conductor moves along the axial direction of the reciprocating drive shaft (608), the copper conductor makes movable contact with the repulsive grooves (5011) to form a repulsive structure, and the coating deposited on the surface of the inclined copper conductor is removed by vibration, as described in claim 5, an integrated fire-resistant wire manufacturing apparatus.

Images