Extrusion device for the production of flame-retardant cables

Abstract

This invention relates to an extrusion apparatus for manufacturing flame-retardant cables, belonging to the technical field of cable manufacturing equipment. The flame-retardant cable extrusion apparatus includes a right-angle extruder, a vacuum water cooler, and an electric sprayer. The vacuum water cooler is located on the discharge side of the extruder head, and the electric sprayer is fixedly connected to and communicates with one of the outlets of the vacuum water cooler. An isolation mechanism seals off the diffusion space between the extruder head and the vacuum water cooler where gaseous pollutants released from the high-temperature cable sheath are located. The cable undergoes initial cooling and encapsulates gaseous pollutants within the mounting cylinder through a spiral air shroud formed by an air inlet pipe, a spiral guide plate, and a centrifugal fan, preventing the exhaust gas from diffusing into the workshop. Airflow directed towards the right-angle extruder head forms an air seal barrier, preventing cooling water from the electric sprayer from overflowing into the mounting cylinder and the extruder head, protecting precision components such as the die core and die sleeve.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing equipment technology, and in particular to an extrusion apparatus for manufacturing flame-retardant cables. Background Technology

[0002] As a core piece of equipment for manufacturing flame-retardant cables, the right-angle extruder has a die head material flow direction that is perpendicular to the screw centerline. The die head is equipped with a die core, die sleeve, and pressure equalizing ring. The core wire passes through the center of the die core, and the plastic melt is evenly coated on the surface of the core wire after the die head turns. Then the cable enters the cooling water tank for rapid shaping. This machine has a compact structure and is easy to operate. It can achieve continuous and stable production and ensure uniform coating thickness.

[0003] Due to the process layout, a certain distance needs to be maintained between the die head outlet and the cooling water tank. During continuous production, the cable sheath extruded at high temperature continuously releases gaseous pollutants in this space. These waste gases diffuse into the surrounding environment, causing pollution to the workshop air environment. Summary of the Invention

[0004] Therefore, it is necessary to provide a flame-retardant cable manufacturing extrusion device to address the problem of gaseous pollutants released from high-temperature extruded material during continuous production of a right-angle die extruder, and the diffusion of these gaseous pollutants within the inter-space.

[0005] An extrusion apparatus for manufacturing flame-retardant cables includes a right-angle extruder, a vacuum water chiller, and an electric sprayer. The vacuum water chiller is located on the discharge side of the extruder head. The electric sprayer is fixedly connected to and communicates with one of the water outlets of the vacuum water chiller. The spraying part of the electric sprayer is located between the extruder head and the vacuum water chiller. An improved isolation mechanism is installed between the extruder head and the vacuum water chiller.

[0006] In one embodiment, the isolation mechanism includes a carrier box, which is detachably connected between the extruder head of the right-angle extruder and the vacuum water cooler via a flange. The spraying part of the electric sprayer extends into the interior of the carrier box. An installation cylinder is fixedly connected to the inner wall of the carrier box facing the extruder head. The opening of the installation cylinder near the extruder head communicates with the discharge port of the extruder head. An air inlet pipe and an air outlet pipe are fixedly connected and communicated on the surface of the installation cylinder. The air outlet pipe is located on the side of the air inlet pipe away from the extruder head. A spiral air guide plate is fixedly connected inside the installation cylinder. The air inlet pipe and the air outlet pipe are staggered with the spiral portion of the spiral air guide plate. The air inlet end of the air inlet pipe and the air outlet end of the air outlet pipe both extend out of the carrier box. A centrifugal fan is detachably connected to the air inlet end of the air inlet pipe via a flange. An air filter is detachably connected to the air inlet end of the centrifugal fan via a flange. The air outlet end of the air outlet pipe is detachably connected to the air filter via a flange.

[0007] In one embodiment, a liquid guiding conical hopper is fixedly connected to and communicates with the bottom of the carrying box, a flanged three-way pipe is fixedly connected to the bottom of the liquid guiding conical hopper, a lower opening of the flanged three-way pipe is detachably connected to a water return pipe of a water inlet of a vacuum water chiller through a flange, and an air outlet end of the air outlet pipe sequentially passes through the liquid guiding conical hopper and the flanged three-way pipe and is detachably connected to a central opening of the flanged three-way pipe through a flange.

[0008] In one embodiment, no less than ten heat conduction pipes are fixedly connected to the surface of the gas outlet pipe, all of which are arranged inside the liquid guiding conical hopper; the lower end portion of the heat conduction pipe passes through the gas outlet pipe and does not communicate with the interior of the gas outlet pipe; two ends of the heat conduction pipe are respectively arranged at two sides of the gas outlet pipe; and a guide conical hopper is fixedly connected to and communicates with the upper end portion of the heat conduction pipe.

[0009] In one embodiment, communication parts of the air inlet pipe and the air outlet pipe with the mounting cylinder are both arranged above the axis of the mounting cylinder; the communication part of the air inlet pipe with the mounting cylinder is arranged at the highest position of the air inlet pipe; and the communication part of the air outlet pipe with the mounting cylinder is arranged at the highest position of the air outlet pipe.

[0010] In one embodiment, the liquid guiding conical hopper is shaped like a rectangular funnel, and the surface of the liquid guiding conical hopper is covered with a heat insulating material.

[0011] In one embodiment, the heat conduction pipes and the guide conical hoppers are spirally and alternately distributed around the axis of the air outlet pipe, and two adjacent guide conical hoppers are alternately distributed.

[0012] In one embodiment, the vertical cross-section of the heat conduction pipe is approximately "丿"-shaped, and the heat conduction pipe is a structural member made of copper alloy material.

[0013] In one embodiment, the guide conical hopper is approximately inverted conical, and two ends of the guide conical hopper are respectively in contact with the liquid guiding conical hopper and the air outlet pipe.

[0014] In one embodiment, a spraying portion of the electric sprayer and the communication portion of the air outlet pipe with the mounting cylinder are both arranged directly above the upper opening of the liquid guiding conical hopper.

[0015] In one embodiment, the air outlet pipe is approximately L-shaped, and the air filter is arranged above the lowest part of the air outlet pipe.

[0016] 1. The above-mentioned flame-retardant cable manufacturing extrusion device has an isolation mechanism that seals off the diffusion space between the extruder head of the right-angle extruder and the vacuum water cooler, preventing the high-temperature cable sheath from releasing gaseous pollutants. This allows the cable to undergo initial cooling and encapsulate gaseous pollutants within the mounting cylinder through a spiral air shroud formed by the air inlet pipe, spiral air guide plate, and centrifugal fan, preventing exhaust gas from spreading into the workshop. The airflow pointing towards the right-angle extruder side forms an air seal barrier, preventing the cooling water from the electric sprayer from overflowing into the mounting cylinder and the right-angle extruder head, protecting precision components such as the mold core and mold sleeve, reducing air pollution in the workshop, and improving subsequent cooling and shaping efficiency.

[0017] 2. The cooling water sprayed by the electric sprayer flows into the liquid guiding cone and is guided by the cone to the heat-conducting pipe that passes through the outlet pipe. It exchanges heat indirectly with the hot air in the outlet pipe, causing the return cooling water to absorb heat and rise in temperature. It then returns to the vacuum water chiller for recycling through the flange tee and the return water pipe. At the same time, it cools the air in the outlet pipe. Some of the high-temperature steam condenses and settles on the surface of the heat-conducting pipe, reducing the amount of steam entering the air filter. There is no need to install an additional condenser, which reduces manufacturing costs and operating energy consumption, and realizes the return cooling of the sprayed cooling water and the pretreatment of exhaust gas. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the isolation mechanism in this invention; Figure 3 This is a schematic diagram of the isolation mechanism in this invention without the carrier box; Figure 4 This is a partial structural schematic diagram of the isolation mechanism in this invention; Figure 5 This is a partial horizontal cross-sectional view of the isolation mechanism in this invention; Figure 6 This is a partial vertical sectional view of the isolation mechanism in this invention; Figure 7 This is a schematic diagram showing the arrangement of the heat pipes and the guide cone in this invention; Figure 8 This is a schematic diagram showing the separation of the liquid guiding cone, flange tee, and return water pipe in this invention.

[0020] Figure label: 100. Right-angle extruder head; 200. Vacuum water chiller; 300. Electric sprayer; 400. Isolation mechanism; 410. Carrier box; 420. Mounting cylinder; 430. Air inlet pipe; 440. Air outlet pipe; 450. Spiral air guide plate; 460. Centrifugal fan; 470. Air filter; 480. Liquid guide cone; 490. Flange tee; 4100. Water return pipe; 4110. Heat transfer pipe; 4120. Guide cone. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0026] The following is combined with Figures 1-8 This invention describes an extrusion apparatus for manufacturing flame-retardant cables.

[0027] In one embodiment, a flame-retardant cable manufacturing extrusion apparatus includes a right-angle extruder 100, a vacuum water chiller 200, and an electric sprayer 300. The vacuum water chiller 200 is disposed on the discharge side of the extruder head of the right-angle extruder 100. The electric sprayer 300 is fixedly connected and communicates with one of the water outlets of the vacuum water chiller 200. The spraying part of the electric sprayer 300 is disposed between the extruder head of the right-angle extruder 100 and the vacuum water chiller 200. An isolation mechanism 400 is installed between the extruder head of the right-angle extruder 100 and the vacuum water chiller 200.

[0028] like Figures 2-8 As shown, the isolation mechanism 400 includes a carrier box 410, which is detachably connected between the extruder head of the right-angle extruder 100 and the vacuum water cooler 200 via a flange. The spraying part of the electric sprayer 300 extends into the interior of the carrier box 410. An installation cylinder 420 is fixedly connected to the inner wall of the carrier box 410 facing the extruder head of the right-angle extruder 100. The opening of the installation cylinder 420 near the extruder head of the right-angle extruder 100 is connected to the discharge port of the extruder head of the right-angle extruder 100. An air inlet pipe 430 and an air outlet pipe 440 are fixedly connected and connected to the surface of the installation cylinder 420. Located on the side of the extruder head 100 away from the right-angle extruder head, the air inlet pipe 430 is fixedly connected to the spiral air guide plate 450 inside the mounting cylinder 420. The air inlet pipe 430 and the air outlet pipe 440 are staggered with the spiral part of the spiral air guide plate 450. The air inlet end of the air inlet pipe 430 and the air outlet end of the air outlet pipe 440 both pass through the carrier box 410. The air inlet end of the air inlet pipe 430 is detachably connected to the centrifugal fan 460 through a flange. The air inlet end of the centrifugal fan 460 is detachably connected to the air filter 470 through a flange. The air outlet end of the air outlet pipe 440 is detachably connected to the air filter 470 through a flange.

[0029] The connection between the air inlet pipe 430 and the mounting cylinder 420, and the connection between the air outlet pipe 440 and the mounting cylinder 420 are both located above the axis of the mounting cylinder 420. The connection between the air inlet pipe 430 and the mounting cylinder 420 is located at the highest point of the air inlet pipe 430, and the connection between the air outlet pipe 440 and the mounting cylinder 420 is located at the highest point of the air outlet pipe 440.

[0030] As Figures 2-8 shown, the bottom of the carrying box 410 is fixedly connected and communicates with a liquid-guiding conical hopper 480, the bottom of the liquid-guiding conical hopper 480 is fixedly connected with a flanged three-way pipe 490, the lower opening of the flanged three-way pipe 490 is detachably connected with a water return pipe 4100 through a flange, and the water return pipe 4100 communicates with one of the water inlets of the vacuum water chiller 200. The gas outlet end of the gas outlet pipe 440 sequentially passes through the liquid-guiding conical hopper 480 and the flanged three-way pipe 490, and is detachably connected to the central opening of the flanged three-way pipe 490 through a flange; the surface of the gas outlet pipe 440 is fixedly connected with no less than ten heat conduction pipes 4110, all of which are arranged inside the liquid-guiding conical hopper 480. The lower end of the heat conduction pipe 4110 passes through the pipe wall of the gas outlet pipe 440, the interior of the heat conduction pipe 4110 is not communicated with the interior of the gas outlet pipe 440, the two ends of the heat conduction pipe 4110 are respectively located on both sides of the pipe wall of the gas outlet pipe 440, and the upper end of the heat conduction pipe 4110 is fixedly connected and communicates with a guiding conical hopper 4120.

[0031] The liquid-guiding conical hopper 480 is in the shape of a rectangular funnel, and the surface of the liquid-guiding conical hopper 480 is covered with a thermal insulation material to reduce the heat exchange between the cooling water and the external environment inside the liquid-guiding conical hopper 480. The heat conduction pipes 4110 and the guiding conical hoppers 4120 are spirally and staggered distributed around the axis of the gas outlet pipe 440, and two adjacent guiding conical hoppers 4120 are staggered distributed both in the circumferential direction and the axial direction. The vertical cross-sectional shape of the heat conduction pipe 4110 is similar to a left-slanting stroke "\丿", and the heat conduction pipe 4110 is a component made of copper alloy material; the guiding conical hopper 4120 is substantially inverted conical in shape, the upper end of the guiding conical hopper 4120 is in contact with the inner wall of the liquid-guiding conical hopper 480, and the lower end is in contact with the outer surface of the gas outlet pipe 440, so as to guide the cooling water collected by the liquid-guiding conical hopper 480 into the upper end of the heat conduction pipe 4110. Both the spraying part of the electric sprayer 300 and the communication part between the gas outlet pipe 440 and the mounting cylinder 420 are arranged directly above the upper opening of the liquid-guiding conical hopper 480; the gas outlet pipe 440 is substantially L-shaped, and the air filter 470 is located above the bottommost pipe section of the gas outlet pipe 440.

[0032] As Figures 1-8 shown, the operation process of the cable extrusion molding device is as follows: Step 1, extrusion discharging: the core wire to be coated is continuously fed into the head of the right-angle head extruder 100, the plastic melt is diverted through the head of the right-angle head extruder 100 and then uniformly coated on the surface of the core wire to form a high-temperature extruded cable sheath, the cable after extrusion is continuously output from the discharge port of the head of the right-angle head extruder 100 and directly enters the interior of the mounting cylinder 420 of the isolation mechanism 400. The isolation mechanism 400 seals and isolates the outlet of the head of the right-angle head extruder 100 from the subsequent cooling area, providing a closed environment for waste gas control and staged cooling.

[0033] Step 2, Preliminary Cooling: Start the centrifugal fan 460. After being filtered and purified by the air filter 470, the external air is sent into the installation cylinder 420 through the air inlet pipe 430. Under the forced airflow of the spiral air guide plate 450, a spiral air shroud is formed to wrap around the extruded cable, providing the first stage of sealing and preliminary cooling for the high-temperature cable sheath. This spiral air shroud pre-cools the high-temperature cable to improve the subsequent cooling effect and shaping efficiency, while also enveloping the gaseous pollutants released by the cable to prevent them from spreading into the workshop. The airflow sent into the installation cylinder 420 through the air inlet pipe 430 is guided by the spiral air guide plate 450 to form an air seal barrier pointing towards the right-angle extruder 100 on the side of the installation cylinder 420 near the right-angle extruder 100 head. This prevents the subsequent cooling water from flowing back into the right-angle extruder 100 head, protecting the precision components such as the mold core and mold sleeve inside the right-angle extruder 100 head.

[0034] Step 3, Enhanced Cooling: The initially cooled cable exits from the opening on the side of the extruder 100 away from the right-angle extruder head of the mounting cylinder 420 and enters the area between the mounting cylinder 420 and the vacuum water chiller 200 inside the bearing box 410. The spray section of the electric sprayer 300 sprays the cable surface, and the cooling water directly contacts the cable sheath to achieve a second stage of enhanced cooling. After the first stage of preliminary cooling, the cable surface temperature has already decreased. At this time, spray cooling can avoid the high-temperature cable directly contacting a large amount of cooling water, which would cause uneven cooling and contraction, resulting in internal stress or surface defects. At the same time, it further reduces the cable temperature and prepares for subsequent deep cooling.

[0035] Step 4, Deep Cooling: After the cable has undergone spray-enhanced cooling, it enters the vacuum water chiller 200 and is immersed in the cooling water tank inside the vacuum water chiller 200 under vacuum negative pressure for the third stage of deep cooling. This process completely sets the cable sheath and finally outputs the finished cable from the discharge end of the vacuum water chiller 200. The three-stage gradual cooling process avoids excessive temperature differences that could cause quality defects such as bubbles, cracks, or uneven shrinkage on the cable sheath, ensuring the insulation performance and structural integrity of the finished cable.

[0036] Step 5: Cooling water circulation and airflow cooling: After the cooling water sprayed by the electric sprayer 300 completes the spray cooling, it is collected in the liquid guiding cone 480. The guide cone 4120 receives the cooling water collected in the liquid guiding cone 480 and guides it into the heat conduction pipe 4110. Since the heat conduction pipe 4110 passes through the pipe wall of the air outlet pipe 440, the cooling water flowing through the heat conduction pipe 4110 and the hot airflow discharged from the air outlet pipe 440 exchange heat indirectly through the pipe wall of the heat conduction pipe 4110, actively cooling the hot airflow in the circulation. This process can achieve airflow cooling without the need for an additional condenser, thereby simplifying the equipment structure, reducing manufacturing costs and operating energy consumption. The cooling water that absorbs heat and heats up flows along the heat conduction pipe 4110 to the bottom of the liquid guiding cone 480, and then flows back to the inlet of the vacuum water chiller 200 through the flange tee 490 and the return water pipe 4100, realizing recycling.

[0037] Step Six: Waste Gas Recirculation and Purification: The centrifugal fan 460 operates continuously, and the hot air carrying pollutants is discharged through the outlet pipe 440. After indirect heat exchange with the cooling water in the heat conduction pipe 4110 inside the outlet pipe 440, the temperature drops. Some of the high-temperature steam in the hot air condenses into liquid water droplets on the outer surface of the heat conduction pipe 4110, achieving steam sedimentation. The sedimented condensate droplets are deposited along the inner wall of the outlet pipe 440. The waste gas after cooling and sedimentation treatment enters the air filter 470 from the outlet end of the outlet pipe 440 for filtration and purification. The purified clean air is sent back into the installation cylinder 420 through the inlet pipe 430 by the centrifugal fan 460 for recycling, forming a closed-loop internal circulation airflow system, and the waste gas is not discharged outside throughout the process.

[0038] Working principle: The isolation mechanism 400 is connected to the discharge side of the extrusion head of the right-angle extruder 100 via the carrier box 410. The mounting cylinder 420 is connected to the discharge port of the right-angle extruder 100 to form a closed isolation. The cable extruded from the right-angle extruder 100 is initially cooled and encapsulated by the spiral air shroud formed by the spiral air guide plate 450 inside the mounting cylinder 420. At the same time, the airflow sent into the mounting cylinder 420 by the inlet pipe 430 is guided by the spiral air guide plate 450 to form an air seal pointing towards the right-angle extruder 100 on the side of the mounting cylinder 420 near the right-angle extruder 100. The hot airflow carrying pollutants is discharged through the outlet pipe 440 and exchanges heat with the cooling water in the heat pipe 4110 to cool down and condense. After being purified by the air filter 470, it is sent back to the inlet pipe 430 for circulation by the centrifugal fan 460. The isolation mechanism 400 encloses the diffusion space at the outlet of the right-angle extruder 100, blocking the diffusion of gaseous pollutants into the workshop; the air seal prevents cooling water from flowing back into the right-angle extruder 100; internal circulation purification avoids the discharge of waste gas, recovers the heat of waste gas to eliminate the need for a condenser, reducing costs and consumption; the closed isolation combined with staged cooling reduces defects such as bubbles and cracks in the cable sheath, achieving environmentally friendly, energy-saving, stable and continuous production.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A flame-retardant cable manufacturing extrusion apparatus, comprising a right-angle extruder (100), a vacuum water cooler (200), and an electric sprayer (300), wherein the vacuum water cooler (200) is disposed on the discharge side of the extruder head of the right-angle extruder (100), the electric sprayer (300) is fixedly connected to and communicates with one of the water outlets of the vacuum water cooler (200), and the spraying part of the electric sprayer (300) is disposed between the extruder head of the right-angle extruder (100) and the vacuum water cooler (200), characterized in that, An improved isolation mechanism (400) is installed between the extruder head (100) and the vacuum water cooler (200). The isolation mechanism (400) includes a carrier box (410), which is detachably connected between the head of the right-angle extruder (100) and the vacuum water cooler (200) via a flange. The spraying part of the electric sprayer (300) extends into the interior of the carrier box (410). An installation cylinder (420) is fixedly connected to the inner wall of the carrier box (410) facing the right-angle extruder (100). The opening of the installation cylinder (420) near the head of the right-angle extruder (100) is connected to the discharge port of the head of the right-angle extruder (100). An air inlet pipe (430) and an air outlet pipe (440) are fixedly connected and connected to the surface of the installation cylinder (420). 0) The air inlet pipe (430) is located on the side away from the extruder head (100) of the right-angle extruder. The mounting cylinder (420) is fixedly connected to a spiral air guide plate (450). The air inlet pipe (430) and the air outlet pipe (440) are staggered with the spiral part of the spiral air guide plate (450). The air inlet end of the air inlet pipe (430) and the air outlet end of the air outlet pipe (440) both pass through the bearing box (410). The air inlet end of the air inlet pipe (430) is detachably connected to a centrifugal fan (460) through a flange. The air inlet end of the centrifugal fan (460) is detachably connected to an air filter (470) through a flange. The air outlet end of the air outlet pipe (440) is detachably connected to the air filter (470) through a flange.

2. The flame-retardant cable manufacturing extrusion apparatus according to claim 1, characterized in that, The bottom of the carrier box (410) is fixedly connected to and connected to a liquid guiding cone (480). The bottom of the liquid guiding cone (480) is fixedly connected to a flange tee (490). The lower opening of the flange tee (490) is detachably connected to a return water pipe (4100) that is connected to one of the water inlets of the vacuum water chiller (200) via a flange. The air outlet end of the air outlet pipe (440) passes through the liquid guiding cone (480) and the flange tee (490) in sequence and is detachably connected to the middle opening of the flange tee (490) via a flange.

3. The flame-retardant cable manufacturing extrusion apparatus according to claim 2, characterized in that, The surface of the vent pipe (440) is fixedly connected with no fewer than ten heat-conducting pipes (4110), all of which are located inside the liquid-guiding cone (480). The lower end of the heat-conducting pipe (4110) passes through the vent pipe (440) and is not connected to the interior of the vent pipe (440). The two ends of the heat-conducting pipe (4110) are respectively located on both sides of the vent pipe (440). The upper end of the heat-conducting pipe (4110) is fixedly connected to and connected to the guide cone (4120).

4. The flame-retardant cable manufacturing extrusion apparatus according to claim 3, characterized in that, The connection points between the air inlet pipe (430) and the air outlet pipe (440) and the mounting cylinder (420) are both located above the axis of the mounting cylinder (420). The connection point between the air inlet pipe (430) and the mounting cylinder (420) is located at the highest point of the air inlet pipe (430), and the connection point between the air outlet pipe (440) and the mounting cylinder (420) is located at the highest point of the air outlet pipe (440).

5. The flame-retardant cable manufacturing extrusion apparatus according to claim 2, characterized in that, The liquid guide conical hopper (480) is shaped like a rectangular funnel, and the surface of the liquid guide conical hopper (480) is covered with a thermal insulation material.

6. The flame-retardant cable manufacturing extrusion apparatus according to claim 3, characterized in that, The heat conduction pipes (4110) and the guide conical hoppers (4120) are all spirally and alternately distributed around the axis of the gas outlet pipe (440), and every two adjacent guide conical hoppers (4120) are alternately distributed.

7. The flame-retardant cable manufacturing extrusion apparatus according to claim 3, characterized in that, The vertical cross-section of the heat conduction pipe (4110) is in a shape similar to the Chinese character "丿", and the heat conduction pipe (4110) is a component made of copper alloy material.

8. The flame-retardant cable manufacturing extrusion apparatus according to claim 3, characterized in that, The guide conical hopper (4120) is shaped like an inverted cone, and the two ends of the guide conical hopper (4120) are in contact with the liquid guide conical hopper (480) and the gas outlet pipe (440) respectively.

9. The flame-retardant cable manufacturing extrusion apparatus according to claim 3, characterized in that, Both the spraying part of the electric sprayer (300) and the communication part between the gas outlet pipe (440) and the mounting cylinder (420) are arranged directly above the upper opening of the liquid guide conical hopper (480).

10. The extrusion apparatus for manufacturing flame-retardant cables according to claim 1, characterized in that, The gas outlet pipe (440) is shaped like an "L", and the air filter (470) is arranged above the bottommost part of the gas outlet pipe (440).

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