A fireproof insulation cable forming and coating device

Abstract

The utility model discloses a kind of fireproof insulation cable forming coating devices, including bottom plate, bottom plate side connection extruding machine, extruding machine side is connected with head, head side is equipped with cleaning mechanism, cleaning mechanism includes the cleaning cavity being equipped in head side, annular pipe is connected in cleaning cavity inside, annular pipe is evenly connected with gas jet pipe on it, annular pipe is connected with gas storage tank by connecting pipe, electromagnetic valve is equipped on connecting pipe, the utility model is by being provided with cleaning cavity before head, and using annular pipe cooperation evenly distributed gas jet pipe, realize 360 ° all-around gas blowing to cable surface.High-pressure clean airflow can effectively remove the dust, oxide and small particle pollutants on the surface of conductor or inner protective layer, significantly improve the interface cleanliness between extruded insulation material and base material, enhance the bonding strength, effectively avoid defects such as bubble, delamination, debonding, so as to improve the electrical performance, mechanical strength and long-term operation reliability of fireproof insulation cable.

Description

Technical Field

[0001] This utility model relates to the field of cable manufacturing technology, and more specifically, to a fireproof insulated cable forming and covering device. Background Technology

[0002] With the increasing demands for safety and reliability in power systems from modern buildings, rail transportation, petrochemicals, and public facilities, fire-resistant cables, as critical power transmission equipment, directly affect the ability of circuits to continue operating in emergencies such as fires. Fire-resistant insulated cables not only need to possess excellent electrical insulation properties, but must also maintain circuit integrity in high-temperature and open-flame environments to prevent the spread of flames and the release of toxic fumes.

[0003] In the manufacturing process of fire-resistant insulated cables, extrusion coating is one of the core technological steps. This process typically involves using an extruder to uniformly coat the cable conductor or inner sheath with molten insulating material (such as cross-linked polyethylene, low-smoke halogen-free materials, etc.) through a die head while it is in a molten state at high temperature. The material is then cooled in a cooling tank to solidify and form a robust and continuous insulating protective layer. However, before extrusion coating, the cable substrate surface often retains dust, oxides, or particulate contaminants from previous processes. If these contaminants are not effectively removed, they will severely affect the interfacial bonding between the insulating material and the substrate, leading to defects such as bubbles, delamination, and poor adhesion in the coating layer. This, in turn, reduces the cable's electrical performance, mechanical strength, and fire resistance. Especially under high-temperature or fire conditions, interfacial defects can easily become breakdown pathways, causing the fire-resistant function to fail. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a fireproof insulated cable forming and covering device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A fireproof insulated cable forming and covering device includes a base plate, one side of which is connected to an extruder, and one side of the extruder is connected to a die head. A cleaning mechanism is provided on one side of the die head. The cleaning mechanism includes a cleaning chamber located on one side of the die head. An annular pipe is connected inside the cleaning chamber. Air jet pipes are evenly connected to the annular pipe. The annular pipe is connected to an air storage tank through a connecting pipe. An electromagnetic valve is provided on the connecting pipe.

[0007] Furthermore, the cleaning chamber has an inlet on one side and an outlet on the other side.

[0008] Furthermore, in order to absorb the blown-off dust, dust suction hoods are connected to both sides of the cleaning chamber. One end of the dust suction hood is connected to the collection box through a dust suction pipe, and one side of the collection box is connected to the fan through an air guide pipe. A filter screen is installed at the connection between the collection box and the air guide pipe.

[0009] Furthermore, a mounting base is connected to the bottom of the cleaning chamber, the bottom of which is connected to the base, and the base is connected to the bottom plate.

[0010] Furthermore, the collection box, fan, and air storage pipe are located at the bottom of the base.

[0011] Furthermore, a pair of guide rollers are provided on each side of the cleaning chamber, and a sliding groove is provided below the guide rollers. A bidirectional threaded rod is rotatably connected inside the sliding groove, and a slider is threadedly connected to the bidirectional threaded rod. A support frame is connected to the top of the slider, and the guide roller is rotatably installed inside the support frame.

[0012] Furthermore, one end of the bidirectional threaded rod passes through a sliding groove and connects to the rotating plate.

[0013] Furthermore, the sliding groove is fixedly installed on top of the base.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) By setting up a cleaning chamber in front of the machine head and using a ring pipe in conjunction with evenly distributed jet pipes, 360° all-round gas purging of the cable surface is achieved. The high-pressure clean airflow can effectively remove dust, oxides and fine particulate contaminants from the surface of the conductor or inner sheath, significantly improve the interface cleanliness between the extruded insulation material and the substrate, enhance adhesion, and effectively avoid defects such as bubbles, delamination, and debonding, thereby improving the electrical performance, mechanical strength and long-term operational reliability of the fireproof insulated cable. In addition, dust suction hoods are set up on both sides of the cleaning chamber, which, together with the dust suction pipe, collection box, filter screen and fan, form a complete negative pressure suction system. The dust and suspended particles generated during the purging process are captured and collected in time to prevent secondary pollution and workshop air pollution.

[0016] (2) By setting guide rollers, the guide rollers are mounted on the slider via a support frame. The slider is threadedly connected to a bidirectional threaded rod, and the bidirectional threaded rod is driven to rotate by a rotating plate, thereby realizing the left and right movement of the slider in the sliding groove. This structure allows for convenient and precise adjustment of the width of the guide rollers to adapt to the needs of introducing cables of different diameters, ensuring that the cables maintain a stable path and center alignment during cleaning and wrapping, thus improving the versatility and production flexibility of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a fireproof insulated cable forming and covering device according to an embodiment of the present utility model;

[0019] Figure 2 This is a side view of a fireproof insulated cable forming and covering device according to an embodiment of the present utility model;

[0020] Figure 3 This is a structural diagram of the cleaning cavity of a fireproof insulated cable forming and covering device according to an embodiment of the present utility model;

[0021] Figure 4 This is a structural diagram of the internal cleaning chamber of a fireproof insulated cable forming and covering device according to an embodiment of the present utility model;

[0022] Figure 5 This is a structural diagram of the sliding groove of a fireproof insulated cable forming and covering device according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Base plate; 2. Extruder; 3. Die head; 4. Cleaning mechanism; 401. Cleaning chamber; 402. Annular pipe; 403. Air jet pipe; 404. Connecting pipe; 405. Air tank; 406. Solenoid valve; 5. Feed inlet; 6. Discharge outlet; 7. Dust hood; 8. Dust suction pipe; 9. Collection box; 10. Air duct; 11. Fan; 12. Mounting base; 13. Base; 14. Guide roller; 15. Sliding groove; 16. Bidirectional threaded rod; 17. Slider; 18. Support frame; 19. Rotating plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] According to an embodiment of the present invention, a fireproof insulated cable forming and covering device is provided.

[0027] like Figures 1-4As shown, the fireproof insulating cable forming and covering device according to an embodiment of the present utility model includes a base plate 1, with an extruder 2 connected to one side of the base plate 1. The extruder 2 is used to heat high-temperature resistant insulating materials (such as cross-linked polyethylene, low-smoke halogen-free materials, etc.) to a molten state and provide stable material conveying through a screw conveyor system. The extruder 2 is connected to the die head 3 on the side away from the base plate 1. The die head 3, as a key molding component, has a precision mold flow channel inside, which can uniformly coat the outer surface of the cable conductor with molten material, achieving continuous and concentric insulation layer extrusion. A cleaning mechanism 4 is located on one side of the die head 3. The cleaning mechanism 4 includes a cleaning chamber 401 located on one side of the die head 3. An annular pipe 402 is connected inside the cleaning chamber 401. Multiple air jet pipes 403 are evenly connected circumferentially along the annular pipe 402. The air jet pipes 403 extend radially inward, with their outlets facing the cable surface, enabling them to simultaneously spray high-pressure gas from all directions when the cable passes through, achieving 360° all-round, no-dead-angle surface cleaning. The annular pipe 402 is connected to a gas storage tank 405 via a connecting pipe 404. The gas storage tank 405 stores filtered and dried clean compressed air or inert gas (such as nitrogen) to avoid introducing new contaminants. The connecting pipe 404 is equipped with… The cleaning chamber 401 has an electromagnetic valve 406. Dust hoods 7 are connected to both sides of the cleaning chamber 401. One end of the dust hood 7 is connected to the collection box 9 through the dust suction pipe 8. The collection box 9 is used to centrally store the impurities removed from the cable surface. One side of the collection box 9 is connected to the fan 11 through the air guide pipe 10. A filter screen is provided at the connection between the collection box 9 and the air guide pipe 10. A mounting base 12 is connected to the bottom of the cleaning chamber 401. The bottom end of the mounting base 12 is connected to the base 13. The base 13 is connected to the base plate 1. The fan 11 and the electromagnetic valve 406 are controlled by a PLC controller. The PLC controller is installed on the base 13. The PLC controller can automatically control the opening and closing of the electromagnetic valve 406 and the start and stop of the fan 11 according to the cable operation signal, cleaning cycle setting or manual command, so as to realize the coordinated operation of blowing and suction, improve the degree of automation and energy utilization efficiency. The collection box 9, the fan 11 and the air tank 405 are located at the bottom of the base 13.

[0028] like Figures 1-5As shown, the cleaning chamber 401 has an inlet 5 connected to one side and an outlet 6 connected to the other side. Flexible sealing rings are provided at the inlet 5 and outlet 6 to accommodate cables of different diameters and reduce gas leakage. A pair of guide rollers 14 are provided on each side of the cleaning chamber 401, one on each side, to guide the cable to run stably along a predetermined path and prevent it from swinging or deviating during the cleaning process. A sliding groove 15 is provided below the guide rollers 14. A bidirectional threaded rod 16 is rotatably connected inside the sliding groove 15. The threads on both sides of the bidirectional threaded rod 16 are opposite in direction. A slider 17 is threadedly connected to the bidirectional threaded rod 16. A support frame 18 is connected to the top of the slider 17. The guide rollers 14 are rotatably installed inside the support frame 18. One end of the bidirectional threaded rod 16 passes through the sliding groove 15 and is connected to the rotating plate 19. The sliding groove 15 is fixedly installed above the base 13.

[0029] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0030] In actual use, the cable conductor to be coated is first introduced into the device through the guide roller 14 on one side of the feed port 5, passing sequentially through the cleaning chamber 401, the machine head 3, and the cooling tank (not shown in the figure), and finally connected to the traction device, preparing for subsequent continuous production. When the equipment is started, the PLC controller automatically controls the coordinated operation of each component according to the preset program or the received production line operation signal. The fan 11 starts first, establishing a stable negative pressure in the dust collection system; then the solenoid valve 406 opens, and the clean compressed air or nitrogen stored in the air tank 405 enters the annular pipe 402 through the connecting pipe 404, and is sprayed radially at high pressure through the circumferentially evenly distributed jet pipes 403. At the same time, the pollutants blown up during the cleaning process are quickly captured by the dust collection hoods 7 on both sides under the action of negative pressure, and enter the collection box 9 through the dust collection pipe 8. During this process, the filter screen intercepts the dust in the airflow, preventing it from entering the air guide pipe 10 and the inside of the fan 11, thereby protecting the normal operation of the fan 11, extending the service life of the equipment, and ensuring that the exhaust gas meets environmental protection requirements. The simultaneous operation of blowing and suction creates a highly efficient "blow and suck" cleaning mode, minimizing secondary adhesion or spillage of contaminants and ensuring a clean environment in the cleaning area. During the stable passage of the cable through the cleaning chamber 401, its path is precisely guided by guide rollers 14 on both sides. Each pair of guide rollers 14 forms a symmetrical clamping structure, ensuring the cable moves smoothly along the central axis and preventing deviation or vibration from affecting the cleaning effect and subsequent wrapping concentricity. When changing to cables of different diameters for production, the operator can manually rotate the turntable 19, causing the bidirectional threaded rod 16 to rotate. Because the threads on both sides of the bidirectional threaded rod 16 are opposite in direction, the two sliders 17 move synchronously inward or outward under the action of the threads, thereby synchronously adjusting the spacing of the support frame 18 and the guide rollers 14 mounted on it. This structure enables rapid and precise adjustment of the guide roller spacing, adapting to the production needs of cables of various diameters and improving the equipment's versatility and changeover efficiency. After cleaning, the cable enters the extruder head 3. Under the stable molten material pressure provided by the extruder 2, the insulating material is evenly coated on the surface of the cable to form a continuous, dense, and uniformly thick insulation layer.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire-resistant insulated cable forming and covering device, characterized in that, The system includes a base plate (1), one side of which is connected to an extruder (2), and one side of the extruder (2) is connected to a head (3). A cleaning mechanism (4) is provided on one side of the head (3). The cleaning mechanism (4) includes a cleaning chamber (401) located on one side of the head (3). An annular pipe (402) is connected inside the cleaning chamber (401). Air jet pipes (403) are evenly connected to the annular pipe (402). The annular pipe (402) is connected to a gas storage tank (405) through a connecting pipe (404). A solenoid valve (406) is provided on the connecting pipe (404). An inlet (5) is connected to one side of the cleaning chamber (401), and an outlet (6) is connected to the other side. Dust hoods (7) are connected to both sides of the cleaning chamber (401). One end of the dust hood (7) is connected to a collection box (9) through a dust suction pipe (8). One side of the collection box (9) is connected to a fan (11) through a duct pipe (10). A filter screen is provided at the connection between the collection box (9) and the air duct (10); a mounting base (12) is connected to the bottom of the cleaning chamber (401), the bottom end of the mounting base (12) is connected to the base (13), and the base (13) is connected to the base plate (1); the collection box (9), the fan (11) and the air tank (405) are located at the bottom of the base (13); a pair of guide rollers (14) are provided on both sides of the cleaning chamber (401), a sliding groove (15) is provided below the guide rollers (14), a double-threaded rod (16) is rotatably connected inside the sliding groove (15), a slider (17) is threaded on the double-threaded rod (16), a support frame (18) is connected to the top of the slider (17), and the guide rollers (14) are rotatably installed inside the support frame (18); one end of the double-threaded rod (16) passes through the sliding groove (15) and is connected to the rotating plate (19); the sliding groove (15) is fixedly installed above the base (13).

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