Cable insulation layer extruder

Abstract

The invention discloses a cable insulation layer extruder, relates to the technical field of extruders, and aims to solve the problem of product yield, the cable insulation layer extruder comprises an extruder, a cooling water tank and a water supply mechanism, the cooling water tank is arranged on one side of the extruder, and the water outlet end and the water return end of the water supply mechanism are arranged on the upper side and the lower side of the cooling water tank; the extruder comprises a main body, a machine head and a discharge port, the machine head is arranged at an outlet of the main body, and the discharge port is arranged at an outlet of the machine head. The temperature of the machine head is reduced through the heat exchange mechanism, and the compactness of an insulating material is guaranteed; the surface gloss of the insulating layer is improved through the ceramic sleeve and the heater; high efficiency and energy conservation are realized through graded cooling; through the conductor preheater, the cabling rack and the infrared thermometer, the adhesive rate of the conductor and the insulating layer is improved, and the preheating temperature is dynamically adjusted. According to the scheme, the eccentricity of the insulating layer is improved, the surface defect rate is reduced, the productivity is improved, and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable insulation layer extruders, in particular to a cable insulation layer extruder. BACKGROUND

[0002] In the cable manufacturing industry, the cable insulation layer extruder as one of the core equipment, its performance directly determines the quality and production efficiency of the cable insulation layer. The traditional cable insulation layer extruder has many deficiencies in design and application, for example, the cooling process is uneven: the insulation layer needs to be cooled and shaped quickly after extrusion, but the traditional extruder cooling water tank design is usually single, this sharp cooling method can easily cause uneven stress distribution in the insulation layer, and defects such as shrinkage and cracking, which reduces the overall quality of the cable. The adhesion rate of the conductor and the insulation layer is low: there is a large temperature difference between the conductor and the extruded insulation layer, which leads to low adhesion rate of the insulation layer, affecting the electrical performance and mechanical strength of the cable, so the conveying speed of the conductor needs to be reduced to ensure the adhesion rate of the insulation layer, which will also lead to a decrease in production capacity. SUMMARY

[0003] To solve the above problems, that is, to solve the problems raised in the background art, the present application provides a cable insulation layer extruder, which comprises an extruder, a cooling water tank and a water supply mechanism, the cooling water tank is arranged on one side of the extruder, and the water outlet end and the water return end of the water supply mechanism are arranged on the upper and lower sides of the cooling water tank. The extruder comprises a main body, a head and a discharge port, the head is arranged at the outlet of the main body, the discharge port is arranged at the outlet of the head, a heat exchange mechanism for cooling is sleeved on the outer wall of the head, a ceramic sleeve is arranged at the die port of the discharge port, and a heater for heating the ceramic sleeve is installed on the discharge port.

[0004] The heat exchange mechanism comprises a heat exchange sleeve and a heat conducting copper wire, the heat exchange sleeve is sleeved on the outer wall of the head through heat conducting silica gel, one end of the heat conducting copper wire is inserted into the heat exchange sleeve through the outer wall inserted into the heat exchange sleeve, and the inside of the heat exchange sleeve is filled with heat exchange oil.

[0005] Further provided in the present application is that the cooling water tank is provided with a high-temperature water tank and a normal-temperature water tank, the water outlets of the high-temperature water tank and the normal-temperature water tank are both directed to the inside of the cooling water tank, the high-temperature water tank is close to the extruder, the length of the high-temperature water tank is one fourth to one eighth of the length of the normal-temperature water tank, and the water supply mechanism is arranged on the cooling water tank.

[0006] The further setting of the present application is that the water supply mechanism comprises a heat exchange water tank, a water distributor, water pipes and two water valves, the two water valves are arranged above the high-temperature water tank and the normal-temperature water tank respectively, the water valve above the normal-temperature water tank is communicated with the water supply pump through a water pipe, the heat exchange water tank is arranged above the heat exchange sleeve pipe, two channels that are not communicated with each other are arranged on the water distributor, one end of the two channels is communicated with the inside of the heat exchange water tank, and the two channels are communicated with the water supply pump and the valve body above the high-temperature water tank through water pipes respectively.

[0007] The end of the heat-conducting copper wire away from the heat exchange sleeve pipe is inserted into the inside of the heat exchange water tank, the part of the heat-conducting copper wire exposed to the outside is sleeved with a high-temperature-resistant rubber ring, and the heat-conducting copper wire is installed on the heat exchange water tank through a fixing sleeve pipe.

[0008] The further setting of the present application is that the end of the heat-conducting copper wire away from the heat exchange sleeve pipe is arranged in a spiral shape capable of increasing the contact area with the medium.

[0009] The further setting of the present application is that a plurality of annular protrusions capable of increasing the heat exchange area are arranged on the inner wall of the heat exchange sleeve pipe.

[0010] The further setting of the present application is that a conductor preheater is arranged on the side of the extruder away from the cooling water tank.

[0011] The further setting of the present application is that a wire routing rack is arranged between the conductor preheater and the extruder, and an infrared temperature measuring instrument is arranged at the outlet end of the wire routing rack.

[0012] The beneficial technical effect of the present application is that the present application reduces the temperature of the machine head through the heat exchange mechanism, ensures the compactness of the insulating material, improves the surface gloss of the insulating layer through the ceramic sleeve pipe and the heater, realizes high efficiency and energy saving through the staged cooling, improves the adhesion rate of the conductor and the insulating layer and dynamically adjusts the preheating temperature through the conductor preheater, the wire routing rack and the infrared temperature measuring instrument, and the present application improves the eccentricity of the insulating layer, reduces the surface defect rate, improves the production capacity and reduces the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The overall structure schematic diagram of the present application is shown.

[0014] Figure 2 The enlarged view of the heat exchange mechanism is shown.

[0015] Figure 3 The enlarged view of the machine head of the extruder is shown.

[0016] Figure 4 The assembly view of the heat exchange sleeve pipe is shown.

[0017] 1, conductor preheater, 2, wire rack, 3, infrared thermometer, 4, extruder, 5, heat exchange water tank, 6, water distributor, 7, cooling water tank, 8, high-temperature water tank, 9, normal-temperature water tank, 10, machine head, 11, heat exchange sleeve, 12, water pipe, 13, high-temperature rubber ring, 14, fixed sleeve, 15, heat-conducting copper wire, 16, discharge port, 17, ceramic sleeve. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0019] The present application provides an extruder for cable insulation layer, the extruder 4 extrudes the insulation material through the machine head 10 and the discharge port 16 to the die, the conductor passes through the die to make the insulation layer cover the outside of the conductor, the extrusion temperature of the PVC material outer layer is 120-160 degrees Celsius, the extrusion temperature of the core material is 130-190 degrees Celsius, the extrusion temperature of the PP / PE material is 150-230 degrees Celsius, the extrusion temperature of the cross-linked polyethylene material is 130-200 degrees Celsius, the heat exchange mechanism is arranged on the outer wall of the machine head 10 of the extruder 4, so that the temperature at the machine head 10 is reduced by 10-20 degrees Celsius, the raw material is slightly cooled by the extruder 4 through the machine head 10 to ensure the compactness of the insulation material, and then discharged to the die through the discharge port 16, the ceramic sleeve 17 with a heater is arranged at the die, and the heater heats the ceramic sleeve 17 to a temperature higher than the raw material of the machine head by 15-25 degrees Celsius, so as to improve the gloss of the surface of the coated insulation layer.

[0020] The heat exchange mechanism is composed of the heat exchange sleeve 11 sleeved on the outer wall of the machine head 10 and the heat-conducting copper wire 15, the heat exchange sleeve 11 is made of nano-porous copper alloy, the gap between the heat exchange sleeve 11 and the machine head 10 is filled with heat-conducting silicone grease, and the inside of the heat exchange sleeve 11 is filled with heat-conducting oil, the liquid level of the heat-conducting oil is higher than the highest point of the machine head 10, one end of the heat-conducting copper wire 15 is inserted into the inside of the heat exchange sleeve 11 and immersed in the heat-conducting oil, and during assembly, the heat-conducting copper wire 15 is deformed to fill the gap between the heat-conducting copper wire 15 and the heat exchange sleeve 11 by the ductility of pure copper, the heat is transferred to the heat-conducting copper wire 15 through the heat-conducting oil and the heat exchange sleeve 11 made of porous nano-copper alloy, and the end of the heat-conducting copper wire 15 away from the heat exchange sleeve 11 is arranged in a spiral shape, which can ensure the contact area between the heat-conducting copper wire 15 and the medium.

[0021] The heat-conducting oil is synthetic heat-conducting oil, and the specific heat capacity is 2.0-2.4 kj / (kg·℃), which can ensure the stability and heat transfer of the machine head 10.

[0022] The inner wall of the heat exchange sleeve 11 is provided with a plurality of annular protrusions capable of increasing the contact area, so as to ensure the efficiency of heat transfer.

[0023] The insulation layer is still in a molten state after being coated, and needs to be cooled and shaped immediately by a cooling water tank. A high-temperature water tank 8 and a normal-temperature water tank 9 are arranged in the cooling water tank 7. The high-temperature water tank 8 is close to the extruder 4. The insulation layer is cooled slowly in the high-temperature water tank 8 to avoid sharp shrinkage, and then is cooled and shaped completely in the normal-temperature water tank 9.

[0024] The valve body above the normal-temperature water tank 9 is directly communicated with the water supply pump to supply normal-temperature water. The valve body above the high-temperature water tank 8 needs to supply water with a slightly higher temperature. In order to reduce energy consumption and save energy, the supplied water needs to exchange heat in the heat exchange mechanism before flowing into the high-temperature water tank 8. The water supplied by the water supply pump enters the heat exchange water tank 5 through the channel above the water distributor 6. One end of the heat-conducting copper wire 15 is inserted into the heat exchange water tank to heat the supplied water. The heated water flows into the high-temperature water tank 8 through the channel below the water distributor 6.

[0025] The heat-conducting copper wire 15 is installed on the heat exchange water tank 5 through the fixed sleeve 14. The outer wall of the heat-conducting copper wire 15 exposed to the outside is wrapped with a high-temperature-resistant rubber ring 13.

[0026] Before the conductor passes through the extruder 4, the conductor is preheated by the conductor preheater 1 to avoid a large temperature difference between the conductor and the extruded insulation layer, so that better adhesion between the conductor and the insulation layer can be formed.

[0027] A wire routing rack 2 is arranged between the conductor preheater 1 and the extruder 4 to adjust the height of the conductor entering and exiting, so that the conductor can better connect between different devices. An infrared temperature measuring instrument 3 is arranged at the outlet end of the wire routing rack 2 to measure the temperature of the conductor before passing through the extruder 4, so that the preheating temperature curve of the conductor preheater can be dynamically adjusted and the temperature can be adjusted in real time. Since the adhesion rate of the insulation layer is improved, the rate of conductor conveying is also correspondingly improved, so that the production capacity is improved.

[0028] The parameters of the equipment after upgrading and modification are as follows:

[0029] Although the application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the application, and equivalent components can be substituted for the components thereof, especially, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0030] In the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate directional or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for the purpose of facilitating the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The term "comprising" or any other similar word is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to the process, article or equipment / device.

[0033] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A cable insulation layer extruder, comprising an extruder (4), a cooling water tank (7) and a water supply mechanism, wherein the cooling water tank (7) is arranged on one side of the extruder (4), and the water outlet and return ends of the water supply mechanism are arranged on the upper and lower sides of the cooling water tank (7), characterized in that: The extruder (4) comprises a main body, a die (10) and a discharge port (16), wherein the die (10) is arranged at the outlet of the main body, and the discharge port (16) is arranged at the outlet of the die (10). A heat exchange mechanism for cooling is sleeved on the outer wall of the die (10), a ceramic sleeve (17) is arranged at the die mouth of the discharge port (16), and a heater for heating the ceramic sleeve (17) is installed on the discharge port (16); The heat exchange mechanism comprises a heat exchange sleeve (11) and a heat-conducting copper wire (15); the heat exchange sleeve (11) is connected to the outer wall of the machine head (10) through a heat-conducting silicone sleeve; one end of the heat-conducting copper wire (15) passes through the outer wall of the heat exchange sleeve (11) and is inserted into the heat exchange sleeve (11); the interior of the heat exchange sleeve (11) is filled with heat exchange oil.

2. A cable insulation layer extruder according to claim 1, characterized in that: The cooling water tank (7) is provided with a high-temperature water tank (8) and a normal-temperature water tank (9), the water outlets of the high-temperature water tank (8) and the normal-temperature water tank (9) both point to the interior of the cooling water tank (7), the high-temperature water tank (8) is close to the extruder (4), the length of the high-temperature water tank (8) is one-quarter to one-eighth of the length of the normal-temperature water tank (9), and the water supply mechanism is provided on the cooling water tank (7).

3. A cable insulation layer extruder according to claim 1, characterized in that: The water supply mechanism comprises a heat exchange water tank (5), a water distributor (6), a water pipe and two water valves, wherein the two water valves are respectively arranged above the high-temperature water tank (8) and the normal-temperature water tank (9), and the water valve above the normal-temperature water tank (9) is connected to the water supply pump through a water pipe. The heat exchange water tank (5) is arranged above the heat exchange sleeve (11), and the water distributor (6) is provided with two mutually unconnected channels, one end of each of the two channels is connected to the interior of the heat exchange water tank (5), and the two channels are respectively connected to the water supply pump and the valve body above the high-temperature water tank (8) through the water pipe; The end of the heat-conducting copper wire (15) away from the heat-exchange sleeve (11) is inserted into the interior of the heat-exchange water tank (5), the portion of the heat-conducting copper wire (15) exposed to the outside is sleeved with a high-temperature resistant rubber ring (13), and the heat-conducting copper wire (15) is installed on the heat-exchange water tank (5) through a fixed sleeve (14).

4. A cable insulation layer extruder according to claim 1 or 3, characterized in that: One end of the heat-conducting copper wire (15) away from the heat-exchange sleeve (11) is configured in a spiral shape capable of increasing the contact area with the medium.

5. A cable insulation layer extruder according to claim 1 or 3, characterized in that: A plurality of annular protrusions capable of increasing the heat exchange area are provided on the inner wall of the heat exchange sleeve (11).

6. A cable insulation layer extruder according to claim 1, characterized in that: A conductor preheater (1) is provided on the side of the extruder (4) away from the cooling water tank (7).

7. A cable insulation layer extruder according to claim 6, characterized in that: A wiring rack (2) is provided between the conductor preheater (1) and the extruder (4), and an infrared thermometer (3) is provided at the outlet end of the wiring rack (2).

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