Insulating layer extruder for wire and cable preparation

Abstract

The invention discloses an insulating layer extruder for wire and cable preparation, and relates to the field of power devices. According to the scheme, a step-by-step heat dissipation mode of layered extrusion, multi-section cooling and rear-section cooling is adopted; the problems that in the prior art, after the coating thickness of an insulating layer is increased, cooling efficiency is insufficient, shape retentivity is poor, and axis deviation is caused by heat accumulation are solved. The casting thickness is controlled through the flow uniformizing sleeve, the multi-layer structural design of the flow dividing base and the forming assembly is combined, multiple times of accurate coating of the insulating layer is achieved, and efficient heat dissipation is achieved through cooling water and heat dissipation airflow in all stages. According to the mode, deformation caused by large internal and external temperature difference is avoided, the cooling efficiency of the thick insulating layer is remarkably improved, internal heat accumulation is reduced, meanwhile, rapid forming of the insulating layer is achieved, the attaching performance of the insulating layer and the conductor is improved, and the product quality and the production efficiency are ensured.

Description

Technical Field

[0001] The present invention relates to the field of electric devices, in particular to an insulation layer extruder for preparing electric wires and cables. Background Art

[0002] In the manufacturing process of wires and cables, the coating of a thicker insulation layer is often a key process that directly affects the insulation performance and production efficiency of the cable. The traditional insulation coating process usually adopts a one-time integral extrusion of a thicker insulation layer and completes the shaping through long-distance cooling. However, in actual operation, this process has the following technical problems: Since the thicker insulation layer is thicker after extrusion, its cooling speed is slower, and the internal heat is difficult to dissipate quickly, which easily leads to the internal heat of the insulation layer gradually accumulating outward. Heat accumulation not only causes deformation of the insulation layer, but may also cause poor fit between the coated insulation layer and the cable, resulting in axial deviation, which in turn affects the quality of the finished cable. In addition, the long-distance cooling method takes up a lot of space, consumes a lot of energy, and has low production efficiency, which is not conducive to the high efficiency and high quality requirements of modern industrial production. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that the cable surface is covered with a thick insulation layer and the internal heat is slowly dissipated, and to propose an insulation layer extruder for preparing wires and cables.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: an insulation layer extruder for preparing wires and cables, comprising an extrusion assembly connected to the end of the extruder and used for insulating the cable, and a mounting base for fixing the extrusion assembly, and also comprising a radiator for controlling the temperature of the extrusion assembly and an air source for providing a cooling medium to the radiator, wherein the extrusion assembly comprises a layered extrusion head and a molding assembly connected in an axial direction;

[0005] The layered extrusion head includes an injection molding ring cylinder and a diverter seat sealed at both ends thereof, an insulating ring and a tapered cone cylinder are sealed between the two diverter seats, the molding assembly includes a heat-conducting sleeve and short fins and gradient fins attached to the surface thereof, and a sliding sleeve connected to one end of the layered extrusion head is attached to the inner wall of the heat-conducting sleeve;

[0006] When the cable passes through the diverter seat on one side, the surface is coated once, and then it is cooled by the cooling water flow in a short distance and passes through the diverter seat on the other side for a second coating. After the second coating, the cable passes through the molding assembly to be cooled step by step. After cooling to a temperature that can maintain the shape, it slides out of the molding assembly and contacts with the high-speed airflow for cooling and forming.

[0007] As a further description of the above technical solution: the extrusion assembly further comprises a flow uniformizing sleeve arranged on the inner wall of the flow distribution seat for controlling the flow casting thickness, the opposite surfaces of the two flow distribution seats are provided with a plurality of flow distribution holes, the injection ring cylinder is communicated with the extruder and two interfaces are fixed on the surface thereof, the two interfaces are communicated with the inner wall of the temperature insulation ring, a tail seat is fixed on one side of the flow distribution seat corresponding to the tail seat, and a guide ring is sleeved on one end of the tail seat.

[0008] As a further description of the above technical solution: the forming assembly further comprises a spacer fixedly clamped between the sliding sleeve and the corresponding flow distribution seat, the heat conducting sleeve is arranged in a stepped manner, and the surface of the sliding sleeve is threadedly connected with a fixed head for fixing the mounting seat.

[0009] As a further description of the above technical solution: the heat sink comprises an air duct for installing an air source, the air duct is communicated with a heat dissipation cover fixed with the forming assembly, and the air duct is further communicated with a pressurizing cover fixed with the mounting seat.

[0010] As a further description of the above technical solution: the surface of the heat dissipation cover is provided with a plurality of heat dissipation holes for low-speed outflow of high-flow gas, and the end of the pressurizing cover is provided with a flow collecting hole for converging and pressurizing outflow of the gas.

[0011] As a further description of the above technical solution: the air source comprises a driver fixedly penetrating one end of the air duct, two output ends of the driver are respectively provided with an internal fan blade and a water pump, and the water outlet of the water pump is provided with a hose communicated with the corresponding interface.

[0012] As a further description of the above technical solution: the upper surface of the internal fan blade is fixed with an external fan blade, the internal fan blade and the external fan blade are both centrifugal fan blades, and the blade directions of the internal fan blade and the external fan blade are opposite.

[0013] As a further description of the above technical solution: one side of the mounting seat is fixed with a temperature sensor, and the cable penetrates and slides in the temperature sensor.

[0014] As described above, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0015] The present application can realize rapid cooling and forming of the thick insulation layer by layering and extruding the thick cable insulation layer and separately cooling the segments in the layering and extruding process, so that the inner layer is simply cooled and then covered with the outer layer, the outer layer is fully attached to the inner layer which is not fully cooled, the layering and extruding and the pre-cooling of the inner layer are combined to realize rapid cooling and forming of the thick insulation layer, the deformation or axial deviation of the thick insulation layer after covering is avoided, the required cooling distance is shortened, and the space occupation is reduced.

[0016] The high-pressure air provided by the air source is injected between the heat insulation ring and the conical cylinder, and the once-coated insulation layer is attached to the conical cylinder and moves in the conical cylinder, and with the displacement, the position of the conical cylinder is moved from a thicker position to a thinner position, so that the cooling speed is gradually increased, and the heat is quickly carried out by the cooling water flow, so that the heat dissipation speed is gradually increased, and the heat is dissipated in a short distance, compared with the traditional thicker insulation layer directly coated, the internal heat accumulation is smaller, the cooling speed is faster, and the deformation is not easy to appear, and the once-coated internal thin layer has better cable adhesion;

[0017] After the secondary coating, the sliding is in the sliding sleeve, the heat is dissipated outward through the conical heat conduction sleeve, and the short fins and a plurality of gradually changing fins are matched to gradually increase the heat dissipation efficiency, and after the basic form is cooled and formed, it is exposed to the air, the flow hole sprays high-speed airflow and drags the environmental wind to cool the cable, which can realize the natural cooling mode in a short distance, and in the case that the internal heat accumulation is greatly reduced, the external heat dissipation can realize rapid temperature reduction, avoiding long-distance cooling operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the present application;

[0019] Figure 2 is another perspective view of the present application;

[0020] Figure 3 is a top view of the present application;

[0021] Figure 4 is a sectional view of the present application;

[0022] Figure 5 is a sectional view of the present application;

[0023] Figure 6 is a sectional view of the present application;

[0024] Figure 7 is a sectional view of the present application;

[0025] Figure 8 is a sectional view of the present application;

[0026] LEGEND:

[0027] 10, mounting seat;

[0028] 20, extrusion assembly; 21, layered extrusion head; 211, injection ring cylinder; 212, flow distribution seat; 213, flow distribution hole; 214, flow uniformity sleeve; 215, tapered cylinder; 216, temperature insulation ring; 217, interface; 218, tail seat; 219, guide ring; 22, molding assembly; 221, sliding sleeve; 222, spacer; 223, heat conduction sleeve; 224, short fin; 225, gradually changing fin; 226, fixed head;

[0029] 30, air source; 31, driver; 32, built-in fan blade; 33, external fan blade; 34, water pump; 35, hose;

[0030] 40, heat sink; 41, air duct; 42, air inlet cover; 43, heat dissipation cover; 44, pressurization cover; 45, heat dissipation hole; 46, flow collection hole;

[0031] 50, temperature sensor;

[0032] 60, cable. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0034] As shown in Figure 1 - Figure 8 The present application provides an insulation layer extruder for wire and cable preparation, which comprises an extrusion assembly 20 in communication with the end of the extruder and used for the insulation coating of the cable 60, a mounting seat 10 for fixing the extrusion assembly 20, a heat sink 40 for temperature control of the extrusion assembly 20, and an air source 30 for providing cooling medium for the heat sink 40. The extrusion assembly 20 comprises a layered extrusion head 21 and a molding assembly 22 in axial communication.

[0035] The present application solves the problems of insufficient cooling efficiency, poor form retention, and shaft center deviation caused by heat accumulation after the increase of the thickness of the insulation layer in the traditional technology by the way of layered extrusion, multi-stage cooling, and step-by-step heat dissipation of the cooling in the later stage. The flow casting thickness is controlled by the flow uniformity sleeve 214, the multi-layer structure design of the flow distribution seat 212 and the molding assembly 22 is combined, the precise coating of the insulation layer is realized, and the cooling water and the cooling air flow are used for efficient heat dissipation at each stage. This way avoids the deformation caused by the large temperature difference between the inside and the outside, significantly improves the cooling efficiency of the thick insulation layer, reduces the internal heat accumulation, and at the same time realizes the rapid molding of the insulation layer, improves the adhesion of the insulation layer and the conductor, and ensures the product quality and production efficiency.

[0036] The layered extrusion head 21 includes an injection molding ring cylinder 211 and a diverter seat 212 sealed at both ends thereof. The two diverter seats 212 are sealed and clamped with a temperature insulation ring 216 and a conical cone cylinder 215. The molding component 22 includes a heat-conducting sleeve 223 and short fins 224 and gradient fins 225 bonded to its surface. The inner wall of the heat-conducting sleeve 223 is penetrated by a sliding sleeve 221 connected to one end of the layered extrusion head 21.

[0037] When the cable 60 passes through the diverter seat 212 on one side, the surface is coated once, and then it is cooled by the cooling water flow in a short distance and passes through the diverter seat 212 on the other side for a second coating. After the second coating, the cable 60 passes through the molding assembly 22 and is cooled step by step. After cooling to a temperature where the shape can be maintained, it slides out of the molding assembly 22 and contacts with the high-speed airflow for cooling and forming.

[0038] Specifically, such as Figure 7 As shown: the extrusion assembly 20 also includes a uniform flow sleeve 214 located on the inner wall of the diverter seat 212 for controlling the casting thickness, and a plurality of diverter holes 213 are provided on the opposite surfaces of the two diverter seats 212. The injection ring cylinder 211 is connected to the extruder and has two interfaces 217 fixed through the surface. The two interfaces 217 are connected to the inner wall of the thermal insulation ring 216. A tail seat 218 is fixed on one side of the corresponding diverter seat 212, and a guide ring 219 is sleeved on one end of the tail seat 218.

[0039] By setting up a flow equalizer sleeve 214, the flow equalizer sleeve 214 is fixed in the cavity inside the diverter seat 212. The gaps between flow equalizer sleeves 214 of different sizes are different. According to the thickness of the insulation layer of the cable 60, the molten insulator can be coated on the surface of the conductor. Among them, the diverter hole 213 on the surface of the diverter seat 212 can evenly flow the pressurized molten insulator in the injection ring cylinder 211 to the cavity inside the diverter seat 212, thereby maintaining a uniform coating operation.

[0040] Specifically, such as Figure 6 As shown: the molding assembly 22 also includes a spacer 222 clamped and fixed between the sliding sleeve 221 and the corresponding diverter seat 212, the heat-conducting sleeve 223 is arranged in a stepped shape, and the surface thread of the sliding sleeve 221 is matched with a fixing head 226 for clamping and fixing the mounting seat 10.

[0041] By providing the spacer 222, the spacer 222 can separate the sliding sleeve 221 from the corresponding shunt seat 212, thereby preventing the heat of the shunt seat 212 from being transferred to the sliding sleeve 221, causing the sliding sleeve 221 to be overheated and affecting the heat dissipation effect;

[0042] The heat-conducting sleeve 223 is arranged in a stepped shape, which can delay heat transfer through thickness, so that its stepped shape can gradually improve the heat dissipation efficiency.

[0043] The surface of the sliding sleeve 221 is threadedly connected with the fixing head 226, which can be pressed on the mounting base 10 to achieve overall fixation.

[0044] Specifically, as shown in Figure 2 and Figure 5 The radiator 40 includes the air duct 41 on which the air source 30 is mounted, the radiator cover 43 fixed to the forming assembly 22, the pressurizing cover 44 fixed to the mounting base 10, and the air inlet cover 42 fixed to the surface of the air duct 41. The surface of the radiator cover 43 is provided with a plurality of heat dissipation holes 45 for large-flow gas to flow out at a low speed, and the end of the pressurizing cover 44 is provided with a flow collecting hole 46 for gathering and pressurizing the gas to flow out.

[0045] The gas in the air duct 41 forms a high pressure at the position of the pressurizing cover 44 based on the end advantage, and is discharged at a high speed through the flow collecting hole 46 to form a gas flow beam, which drags the environmental wind to cool and form the coated cable 60, while the radiator cover 43 can keep a large flow of gas to flow out at a relatively slow speed. The large flow of gas passes through the short fins 224 and the plurality of gradually changing fins 225 to quickly carry and dissipate the heat, achieving rapid processing and dissipation of the temperature.

[0046] The gradual step-by-step cooling mode of the fins can avoid the temperature of the coated insulation body being reduced too quickly, causing a large temperature difference between the inside and outside of the thick insulation body. The step-by-step cooling mode can process the temperature dissipation in a linear trend, making the temperature inside and outside the insulation body gradually dissipate more uniformly.

[0047] Specifically, as shown in Figure 4 and Figure 5 The gas source 30 includes the driver 31 fixed through the air duct 41 at one end, the built-in fan blade 32 and the water pump 34 mounted at the two output ends of the driver 31, and the water outlet of the water pump 34 provided with the hose 35 in communication with the corresponding interface 217. By setting the driver 31 to simultaneously drive the fan blade to rotate and the water pump 34 to operate, the fan blade generates a cooling airflow outside the extrusion assembly 20, while the water pump 34 cools the inside of the conical cylinder 215 through the interface 217, and the water flow is discharged through the other side of the interface 217 and enters the cooling system for cooling and then circulates into the water pump 34, achieving an internal and external combined cooling mode.

[0048] The upper surface of the built-in fan blade 32 is fixed with the external fan blade 33, and the built-in fan blade 32 and the external fan blade 33 are both centrifugal fan blades, and the blade directions of the built-in fan blade 32 and the external fan blade 33 are opposite.

[0049] Through the cooperation of the built-in fan blade 32 and the external fan blade 33, the directions of the blades are opposite, and when rotating, the external fan blade 33 laterally attracts the air flow to pass through the air inlet cover 42 and pressurizes inwardly and then flows downwardly into the axial position of the built-in fan blade 32, and the built-in fan blade 32 outputs the pressurized air at the axial position to the air duct 41 to pressurize, so that one pressurizes the external gas to enter and one pressurizes the gas to enter into the air duct 41, and the air flow can flow in the air duct 41.

[0050] Specifically, as shown in the figure, one side of the mounting seat 10 is fixed with a temperature sensor 50, and a cable 60 is slidably penetrated in the temperature sensor 50. Figure 1

[0051] The temperature sensor 50 is non-contact, measures the temperature by detecting the infrared radiation emitted by the object, continuously monitors the temperature on the surface of the cable 60, and according to the temperature change, feeds back the operation power of the gas source 30, so that the gas flow rate can change accordingly, ensures that the temperature is within the set range, avoids the influence of too high or too low on the forming quality, and realizes intelligent dynamic control.

[0052] In use, the electric core passes through the guide ring 219 and the tail seat 218 into the left shunt seat 212, and the discharge port of the extruder is communicated with the injection ring cylinder 211, and the molten insulation is filled in the injection ring cylinder 211. At this time, the molten insulation on the inside of the injection ring cylinder 211 enters the cavities in the two shunt seats 212 through the shunt holes 213 on both sides, respectively. At this time, the cavity on the left side is filled with molten insulation, and the gap between the left uniform flow sleeve 214 and the inner cavity is the thickness of the flow casting. The molten insulation is coated and fitted on the surface of the conductor after passing through the gap of the uniform flow sleeve 214, realizing one-time coating. After one-time coating, the molten insulation on the surface of the conductor is easy to deform, so that it slides under the continuous molten insulation injection pressure to fit the conductor, and the inner layer insulation after one-time coating slides in the tapered cylinder 215;

[0053] ​The surface of the conical cylinder 215 is based on the cooling water body circulating quickly, which can quickly dissipate heat, so that the temperature of the inner layer insulation after one-time coating decreases rapidly, and its shape can be basically maintained. At this time, the temperature after one-time coating has been greatly reduced, but the relative temperature is still relatively high. At this time, it is moved to the right shunt seat 212, and the second coating is carried out under the cooperation of the uniform flow sleeve 214 at this position, so that the insulation after one-time coating and second coating is precisely fitted and slides in the sliding sleeve 221. Under the action of the stepped heat conduction sleeve 223 on the surface of the sliding sleeve 221, the heat dissipation rate becomes faster with the change of the moving position, so that the temperature decreases linearly and rapidly, and the shape can be maintained after sliding out of the sliding sleeve 221, that is, the molding can be realized. This way can realize multi-layer separate coating and integrated molding, meet the use thickness, and prevent misalignment between layers. In addition, the temperature can be quickly reduced between different layers, so that the internal temperature of the thick insulation will not accumulate. Compared with the drawbacks of traditional one-time coating, the internal heat accumulation is still in a molten state after external cooling, which can easily drop when suspended, resulting in axial deviation due to the gap between the conductor and the insulation. The gap is small and difficult to find, which has a great impact on the quality of the product. By using the preparation method of the present application, the internal overheating can be dissipated in advance when layered, which greatly reduces the internal heat accumulation, shortens the cooling distance, and has better shape retention.

[0054] By improving the cooling efficiency and reducing the internal heat accumulation, the thick insulation layer can be quickly formed, the cooling distance is shortened, the space occupation is reduced, and the coating quality and adhesion of the cable 60 are improved. By the layered extrusion, segmented cooling and step-by-step heat dissipation, the cooling deficiency and molding quality problems in the traditional technology are solved.

[0055] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An insulation layer extruder for preparing wires and cables, comprising an extrusion assembly (20) connected to an end of the extruder and used for insulating a cable (60) and a mounting base (10) for fixing the extrusion assembly (20), a radiator (40) for controlling the temperature of the extrusion assembly (20) and an air source (30) for providing a cooling medium to the radiator (40), characterized in that: The extrusion assembly (20) includes a layered extrusion head (21) and a molding assembly (22) that are axially connected; The layered extrusion head (21) comprises an injection molding ring cylinder (211) and a diverter seat (212) sealed at both ends thereof, a temperature insulating ring (216) and a conical cone cylinder (215) are sealed and clamped between the two diverter seats (212), the molding component (22) comprises a heat-conducting sleeve (223) and short fins (224) and gradient fins (225) attached to the surface thereof, and a sliding sleeve (221) connected to one end of the layered extrusion head (21) is attached to the inner wall of the heat-conducting sleeve (223); When the cable (60) passes through the diverter seat (212) on one side, its surface is coated once, and then it is cooled by the cooling water flow and passes through the diverter seat (212) on the other side for a second coating. After the second coating, the cable (60) passes through the forming assembly (22) and is cooled step by step. After cooling to a temperature where the shape can be maintained, it slides out of the forming assembly (22) and is formed by contact with the high-speed airflow.

2. The insulation layer extruder for preparing electric wires and cables according to claim 1, characterized in that: The extrusion assembly (20) further includes a uniform flow sleeve (214) located on the inner wall of the diverter seat (212) for controlling the casting thickness. The two diverter seats (212) are provided with a plurality of diverter holes (213) on the opposite surfaces. The injection molding ring cylinder (211) is connected to the extruder and has two interfaces (217) fixed through the surface. The two interfaces (217) are connected to the inner wall of the thermal insulation ring (216). A tail seat (218) is fixed on one side of the corresponding diverter seat (212), and a guide ring (219) is sleeved on one end of the tail seat (218).

3. An insulation layer extruder for preparing wires and cables according to claim 2, characterized in that, The molding assembly (22) further includes a spacer (222) clamped and fixed between the sliding sleeve (221) and the corresponding diverter seat (212); the heat-conducting sleeve (223) is arranged in a stepped shape; and the surface thread of the sliding sleeve (221) is matched with a fixing head (226) for clamping and fixing the mounting seat (10).

4. The insulation layer extruder for preparing wires and cables according to claim 3, characterized in that: The radiator (40) includes an air duct (41) for installing an air source (30), the air duct (41) is connected to a heat dissipation cover (43) fixed to the molding component (22), the air duct (41) is also connected to a pressurizing cover (44) fixed to the mounting seat (10), and an air inlet cover (42) is fixed to the surface of the air duct (41).

5. The insulation layer extruder for preparing electric wires and cables according to claim 4, characterized in that: The surface of the heat dissipation cover (43) is provided with a plurality of heat dissipation holes (45) for the low-speed outflow of large-flow gas, and the end of the pressurization cover (44) is provided with a collecting hole (46) for gathering the pressurized outflow of gas.

6. An insulation layer extruder for preparing wires and cables according to claim 5, characterized in that: The air source (30) includes a driver (31) that passes through and is fixed at one end of the air duct (41). The two output ends of the driver (31) are respectively equipped with built-in fan blades (32) and a water pump (34). The water outlet of the water pump (34) is provided with a hose (35) that is connected to the corresponding interface (217).

7. An insulation layer extruder for preparing wires and cables according to claim 6, characterized in that: An external fan blade (33) is fixed on the upper surface of the internal fan blade (32); both the internal fan blade (32) and the external fan blade (33) are centrifugal fan blades, and the internal fan blade (32) and the external fan blade (33) have opposite blade directions.

8. The insulation layer extruder for preparing electric wires and cables according to claim 1, characterized in that: A temperature sensor (50) is fixed on one side of the mounting seat (10), and the cable (60) penetrates and slides inside the temperature sensor (50).

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