Ultraviolet irradiation crosslinking device for cable insulation layer

Abstract

The utility model relates to the technical field of high polymer material crosslinking process, and provides an ultraviolet irradiation crosslinking device for a cable insulation layer, which comprises a plastic extruding machine head used for wrapping an insulation material outside a conductor to form an insulation wire core; the ultraviolet light irradiation cross-linking machine is positioned on one side of the machine head of the plastic extruding machine and is used for performing ultraviolet light irradiation on the insulated wire core; the traction unit is provided with a first guide wheel and a second guide wheel, the first guide wheel movably abuts against the conductor, and the second guide wheel movably abuts against the insulated wire core; the heating unit is positioned between the first guide wheel and the extruding machine head and is used for heating the conductor; the cooling unit is positioned on the side of the ultraviolet light irradiation cross-linking machine and is used for cooling the insulated wire core; the first guide wheel and the second guide wheel jointly ensure that the conductor and the insulated wire core keep proper tension in the whole production process, and ensure that the conductor and the insulated wire core are positioned at correct working positions in the machine head of the plastic extruding machine and the ultraviolet irradiation cross-linking machine.

Description

Technical Field

[0001] This utility model belongs to the field of polymer material crosslinking technology, specifically relating to an ultraviolet irradiation crosslinking device for cable insulation. Background Technology

[0002] Traditional cross-linked polyethylene (XLPE) insulation uses silane-crosslinked polyethylene (XLPE) insulation material, also known as warm water crosslinking. Its basic principle is to use a silane coupling agent as a crosslinking agent; under the action of an initiator, silane molecules are grafted onto the polyethylene molecular chain. The grafted material undergoes hydrolysis and condensation reactions to form a crosslinked structure. The advantage of this method is stable material and process performance, but it has the following disadvantages: a longer production turnaround time; a warm water crosslinking process is required after extrusion, increasing production time and complexity; improper sealing of cable ends may allow moisture to enter, causing conductor oxidation and blackening; and scale may remain on the surface of the insulated core after crosslinking, affecting product quality and production efficiency.

[0003] Compared to traditional warm water and steam crosslinking, ultraviolet (UV) irradiation crosslinking offers several advantages: high production efficiency, eliminating the need for additional warm water or steam treatment steps; simple equipment, easy maintenance and operation; reduced energy consumption and equipment investment; significantly lower overall energy consumption due to the elimination of additional warm water or steam treatment steps; lower material costs, reducing the need for expensive chemical reagents; and low carbon footprint and environmental friendliness, reducing wastewater discharge and pollution. However, in actual production, UV irradiation crosslinking also faces some challenges: Inside the irradiation chamber, the insulated wire core is typically suspended. During the extrusion head and tail stages, changes in traction force can cause the insulated wire core to vibrate up and down. This vibration not only causes the wire core to deviate from the center of the irradiation chamber but also affects the uniformity of UV irradiation, thus impacting the thermal elongation properties of the insulation layer. Ensuring the stable and centered position of the insulated wire core within the irradiation chamber is a critical issue in the production process. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, the technical problem to be solved by this utility model is: to propose an ultraviolet irradiation crosslinking device for cable insulation layers, by setting a first guide wheel before the extruder head and a second guide wheel after the ultraviolet irradiation crosslinking machine, the first guide wheel and the second guide wheel together ensure that the conductor and the insulated core maintain appropriate tension and position throughout the production process, preventing quality problems caused by deviation or vibration.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose an ultraviolet irradiation crosslinking device for cable insulation, comprising:

[0006] Extruder head, used to wrap insulating material around a conductor to form an insulated wire core;

[0007] An ultraviolet irradiation crosslinking machine is located on one side of the extruder head and is used to irradiate the insulated wire core formed by the extruder head with ultraviolet light.

[0008] The traction unit has a first guide wheel located on the side of the extruder head and a second guide wheel located on the side of the ultraviolet irradiation crosslinking machine away from the extruder head. The first guide wheel moves against the conductor, and the second guide wheel moves against the insulated wire core. The first guide wheel and the second guide wheel are used to maintain tension on the conductor and the insulated wire core in the extruder head and the ultraviolet irradiation crosslinking machine, respectively.

[0009] The conductor and the insulated wire core can change their positions simultaneously in the extruder head and the ultraviolet irradiation crosslinking machine due to the change in the height of the first guide wheel and the second guide wheel in the vertical direction of the traction unit, respectively, so as to ensure that the conductor and the insulated wire core are in the correct working positions in the extruder head and the ultraviolet irradiation crosslinking machine, respectively.

[0010] A heating unit, located between the first guide wheel and the extruder head, is used to heat the conductor;

[0011] A cooling unit, located to the side of the ultraviolet irradiation crosslinking machine, is used to cool the insulated wire core.

[0012] In the aforementioned ultraviolet irradiation crosslinking device for cable insulation, the traction assembly further includes:

[0013] The first bracket is disposed on the side of the heating unit;

[0014] The first support base has one end inserted into the first bracket and connected by a thread, and the first guide wheel is disposed on the first support base;

[0015] The position of the first guide wheel in the vertical direction can change synchronously with the change in the vertical height of the first support base connected to the first bracket.

[0016] In the above-mentioned ultraviolet irradiation crosslinking device for cable insulation, a plurality of first guide wheels are staggered on the first support base, and the first guide wheels move and abut against the two sides of the conductor in the vertical direction respectively.

[0017] In the above-mentioned ultraviolet irradiation crosslinking device for cable insulation, the traction assembly further includes a second support base located on the side of the ultraviolet irradiation crosslinking machine away from the extruder head, and the second guide wheel is threadedly connected to the second support base.

[0018] In the above-mentioned ultraviolet irradiation crosslinking device for cable insulation, the second support base is provided with a plurality of threaded holes in the vertical direction, and the second guide wheel is threadedly connected to the threaded holes by bolts. The vertical position of the second guide wheel can be changed as the bolts are connected to different threaded holes.

[0019] In the aforementioned ultraviolet irradiation crosslinking device for cable insulation, the heating unit includes:

[0020] A heat-conducting component is located on the movement path of the conductor, and the heat-conducting component is provided with a through hole, through which the conductor is drawn into the extruder head;

[0021] A heating element is sleeved on the outer surface of the heat-conducting element, and the heating element heats the conductor through the heat-conducting element;

[0022] A detection element, which is inserted into the heat-conducting element, is used to detect the surface temperature of the conductor.

[0023] In the aforementioned ultraviolet irradiation crosslinking device for cable insulation, the heating unit further includes:

[0024] The second support is located between the first support and the extruder head;

[0025] The third support base has one end inserted into the second bracket and connected by a thread. The heat-conducting element is connected to the third support base. The vertical height of the heat-conducting element can change synchronously with the change in the vertical height of the third support base connected to the second bracket, in order to prevent interference between the inner wall of the through hole and the conductor.

[0026] In the above-mentioned ultraviolet irradiation crosslinking device for cable insulation, a connecting rod is provided on one side of the extruder head, and a channel for the conductor to enter the extruder head is provided in the connecting rod. One end of the heat-conducting component is threadedly connected to the connecting rod, and the through hole communicates with the channel.

[0027] In the above-mentioned ultraviolet irradiation crosslinking device for cable insulation, the cooling unit includes at least two cooling tanks, through which the insulating wire cores pass in sequence for cooling the insulating wire cores.

[0028] In the above-mentioned ultraviolet irradiation crosslinking device for cable insulation, each cooling tank is equipped with a coolant, and the temperature of the coolant in the cooling tank gradually decreases, which is used to cool the insulated wire core in sections.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) In the traction unit, the first guide wheel and the second guide wheel together ensure that the conductor and the insulated wire core maintain appropriate tension throughout the production process, so that the insulated wire core will not shake up and down when it is irradiated by ultraviolet light in the ultraviolet irradiation crosslinking machine, thus preventing quality problems caused by deviation or shaking. Furthermore, by adjusting the height of the first guide wheel and the second guide wheel in the vertical direction of the traction unit, the position of the conductor and the insulated wire core can be precisely adjusted to ensure their correct working position in the extruder head and the ultraviolet irradiation crosslinking machine, ensuring the uniformity of ultraviolet irradiation, thereby guaranteeing the thermal elongation performance of the insulated wire core.

[0031] (2) The heating unit solves the problem of the conductor surface temperature being too low when the air temperature is low. When the conductor surface temperature is too low, after contact with the insulating material, a crystal layer is easily formed on the inner surface of the insulating material. This crystal layer will affect the subsequent ultraviolet light transmission effect, resulting in inconsistent cross-linking degree between the inner and outer layers of the insulating material. By preheating the conductor to an appropriate temperature through the heating unit, the formation of the crystal layer can be effectively prevented, ensuring that ultraviolet light can penetrate the insulating material uniformly and achieve a consistent cross-linking effect between the inner and outer layers.

[0032] (3) The cooling unit includes at least two cooling tanks. The temperature of the coolant in each cooling tank gradually decreases. The insulated wire core passes through these cooling tanks in sequence to achieve gradual cooling. By gradually cooling, the internal stress and surface defects caused by the sudden temperature change of the insulation material can be effectively avoided. This method not only improves the quality of the product, but also ensures the stability and efficiency of the production process. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this scheme.

[0034] In the diagram, 1. Extruder head; 2. Ultraviolet irradiation crosslinking machine; 3. First guide wheel; 4. Second guide wheel; 5. First bracket; 6. First support seat; 7. Second support seat; 8. Heat-conducting component; 9. Through hole; 10. Heating component; 11. Detection component; 12. Second bracket; 13. Third support seat; 14. Connecting rod; 15. Channel; 16. Cooling tank. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] like Figure 1 As shown in the figure, this solution provides an ultraviolet irradiation crosslinking device for cable insulation layers. This device achieves efficient crosslinking treatment of cable insulation materials through ultraviolet irradiation, aiming to improve the mechanical strength, thermal stability and chemical resistance of the cable.

[0038] like Figure 1 As shown, this utility model discloses an ultraviolet irradiation crosslinking device for cable insulation, comprising: an extruder head 1 for wrapping insulating material around a conductor to form an insulated wire core; an ultraviolet irradiation crosslinking machine 2 located on one side of the extruder head 1 for irradiating the insulated wire core formed by the extruder head 1 with ultraviolet light; and a traction unit having a first guide wheel 3 located on the side of the extruder head 1 and a second guide wheel 4 located on the side of the ultraviolet irradiation crosslinking machine 2 away from the extruder head 1, wherein the first guide wheel 3 moves against the conductor and the second guide wheel 4 moves against the insulated wire core, and the first guide wheel 3 and the second guide wheel 4 are used to... The conductor and the insulated wire core are kept under tension in the extruder head 1 and the ultraviolet irradiation crosslinking machine 2, respectively. The positions of the conductor and the insulated wire core can be changed simultaneously in the extruder head 1 and the ultraviolet irradiation crosslinking machine 2 due to the change in the height of the first guide wheel 3 and the second guide wheel 4 in the vertical direction of the traction unit, respectively, so as to ensure that the conductor and the insulated wire core are in the correct working positions in the extruder head 1 and the ultraviolet irradiation crosslinking machine 2, respectively. The heating unit is located between the first guide wheel 3 and the extruder head 1 and is used to heat the conductor. The cooling unit is located on the side of the ultraviolet irradiation crosslinking machine 2 and is used to cool the insulated wire core.

[0039] During operation, the conductor first contacts the first guide wheel 3, then moves to the heating unit, where it is heated. The heated conductor then moves to the extruder head 1, where the extruder head 1 wraps the insulating material around the conductor to form an insulated core. The formed insulated core then moves to the ultraviolet irradiation crosslinking machine 2, where it is irradiated with ultraviolet light to achieve efficient crosslinking. After irradiation, the insulated core moves to the second guide wheel 4 and comes into contact with it. Although the insulated core is suspended inside the ultraviolet irradiation crosslinking machine 2, the design of the first guide wheel 3 and the second guide wheel 4 ensures that the conductor and the insulated core are in contact. The extruder head 1 and the ultraviolet irradiation crosslinking machine 2 maintain appropriate tension to prevent the insulated wire core from shaking up and down due to suspension within the ultraviolet irradiation crosslinking machine 2. Furthermore, by adjusting the height of the first guide wheel 3 and the second guide wheel 4 in the vertical direction of the traction unit, the position of the conductor and the insulated wire core can be precisely adjusted to ensure their correct working position within the extruder head 1 and the ultraviolet irradiation crosslinking machine 2, ensuring the uniformity of ultraviolet irradiation and thus guaranteeing the thermal elongation performance of the insulated wire core. After ultraviolet irradiation, the insulated wire core continues to move to the cooling unit, where it is cooled and shaped. In this way, the entire production process not only improves efficiency but also ensures product quality.

[0040] The main purpose of the heating unit for heating the conductor is to solve the problem of excessively low conductor surface temperature when the air temperature is low. When the conductor surface temperature is too low, it is easy to form a crystal layer on the inner surface of the insulating material after contact with the insulating material. This crystal layer will affect the subsequent ultraviolet light transmission effect, resulting in inconsistent cross-linking degree between the inner and outer layers of the insulating material. By preheating the conductor to an appropriate temperature by the heating unit, the formation of the crystal layer can be effectively prevented, ensuring that ultraviolet light can penetrate the insulating material uniformly and achieve a consistent cross-linking effect between the inner and outer layers.

[0041] Furthermore, the traction assembly also includes: a first bracket 5, which is disposed on the side of the heating unit; a first support 6, one end of which is inserted into the first bracket 5 and connected by a thread; and a first guide wheel 3 disposed on the first support 6. When it is necessary to adjust the height of the first guide wheel 3 in the vertical direction, firstly, the threaded connection between the first support 6 and the first bracket 5 is loosened, allowing the first support 6 to slide freely on the first bracket 5. Then, the first support 6 is adjusted to the required vertical height, thereby moving the first guide wheel 3 to the corresponding position, ensuring that the conductor maintains the correct tension and position under the guidance of the first guide wheel 3. Finally, the threaded connection between the first support 6 and the first bracket 5 is tightened again to fix the position of the first guide wheel 3, completing the adjustment process.

[0042] Furthermore, a number of first guide wheels 3 are staggered on the first support 6. These first guide wheels 3 move and abut against the two sides of the conductor in the vertical direction, thereby ensuring that the conductor always stays on the correct working path and maintains appropriate tension. The staggered layout of the first guide wheels 3 helps to distribute the pressure on the conductor more evenly and ensures that the conductor does not deviate from the predetermined path during movement.

[0043] Furthermore, the traction assembly also includes a second support 7, which is located on the side of the ultraviolet irradiation crosslinking machine 2 away from the extruder head 1, and a second guide wheel 4 is threadedly connected to the second support 7.

[0044] Furthermore, the second support 7 has several threaded holes in the vertical direction, and the second guide wheel 4 is connected to the threaded holes by bolts.

[0045] When it is necessary to adjust the height of the second guide wheel 4 in the vertical direction, first loosen the bolts that fix the second guide wheel 4 to separate the bolts from the threaded holes. Then, adjust the second guide wheel 4 to the required vertical height to ensure that the insulated wire core maintains the correct tension and position under the guidance of the second guide wheel 4. Finally, screw the bolts back into the corresponding threaded holes to fix the position of the second guide wheel 4 and complete the adjustment process.

[0046] The extruder head 1 and the ultraviolet irradiation crosslinking machine 2 are located sequentially between the first guide wheel 3 and the second guide wheel 4, arranged along the transmission path of the conductor and the insulated wire core. Specifically, the first guide wheel 3 is located before the extruder head 1, and the second guide wheel 4 is located after the ultraviolet irradiation crosslinking machine 2. The first guide wheel 3 and the second guide wheel 4 work together to ensure that the conductor and the insulated wire core maintain appropriate tension and position throughout the production process, preventing quality problems caused by deviation or vibration. This not only improves the overall stability of the equipment, but also ensures that the insulated wire core can reach the optimal working state in the extruder head 1 and the ultraviolet irradiation crosslinking machine 2, ensuring the uniformity of ultraviolet irradiation, thereby guaranteeing the thermal elongation performance of the insulated wire core.

[0047] Furthermore, the heating unit includes: a heat-conducting element 8, located on the conductor's movement path, with a through hole 9 on the heat-conducting element 8, through which the conductor passes and is drawn into the extruder head 1. The design of the heat-conducting element 8 ensures that the conductor is uniformly heated before entering the extruder, thereby avoiding the problem of a crystalline layer forming on the inner surface of the insulating material due to excessively low conductor surface temperature; a heating element 10, sleeved on the outer surface of the heat-conducting element 8, which conducts heat to the heat-conducting element 8 to uniformly heat the conductor passing through the through hole 9. This design ensures that the conductor reaches the required preheating temperature before entering the extruder; and a detection element 11, inserted into the heat-conducting element 8, for real-time monitoring of the conductor surface temperature and ambient temperature. Through this design, the heating unit can not only ensure that the conductor reaches the ideal temperature before entering the extruder, but also ensure the stability of the entire production process and product quality through real-time monitoring and adjustment. Preferably, the heat-conducting element 8 is made of stainless steel, the heating element 10 is preferably in the form of a heating coil, and the detection element 11 is preferably a thermocouple.

[0048] Thermocouples can accurately measure temperature differences, ensuring precise temperature control during the heating process. This real-time monitoring allows for timely adjustments to the heating power, ensuring the conductor remains within the optimal preheating temperature range. A thermocouple is a temperature sensor based on the Seebeck effect, determining temperature by measuring the voltage generated by the temperature difference between two different materials. It offers advantages such as a wide temperature measurement range, rapid response, durability, and cost-effectiveness, making it suitable for various industrial and scientific applications. In heating units, thermocouples ensure the conductor reaches the ideal preheating temperature before entering the extruder, thereby guaranteeing the quality and performance of the insulation material.

[0049] Furthermore, the heating unit also includes: a second bracket 12, which is located between the first bracket 5 and the extruder head 1; a third support 13, one end of which is inserted into the second bracket 12 and connected by threads, and the heat-conducting element 8 is connected to the third support 13; the second bracket 12 provides a stable support platform for the third support 13, which not only plays a supporting role, but also allows the operator to easily adjust the height of the heat-conducting element 8. By loosening the threaded connection between the third support 13 and the second bracket 12, the height of the heat-conducting element 8 in the vertical direction can be precisely adjusted. Through this height adjustment mechanism, it can be ensured that the distance between the inner wall of the through hole 9 of the heat-conducting element 8 and the conductor is always kept in a suitable state, thereby avoiding contact or friction between the inner wall of the through hole 9 and the conductor, and ensuring smooth movement and uniform heating of the conductor.

[0050] Furthermore, a connecting rod 14 is provided on one side of the extruder head 1. The connecting rod 14 has a channel 15 inside for the conductor to enter the extruder head 1. One end of the heat-conducting component 8 is fixed to the connecting rod 14 by a threaded connection, and its through hole 9 is precisely aligned and connected with the channel 15 inside the connecting rod 14. The heat-conducting component 8 is fixed in an appropriate position by the connecting rod 14 to ensure that its through hole 9 is seamlessly connected with the channel 15 inside the connecting rod 14. This design allows the conductor to seamlessly enter the channel 15 of the connecting rod 14 after passing through the through hole 9 of the heat-conducting component 8, and finally reach the extruder head 1. This not only ensures the smooth movement of the conductor, but also ensures that the conductor can directly enter the extruder head 1 after heating, reducing heat loss and improving production efficiency.

[0051] To achieve segmented cooling of the insulated wire core, the cooling unit includes at least two cooling tanks 16. The temperature of the coolant in each cooling tank 16 gradually decreases. The insulated wire core passes through these cooling tanks 16 sequentially, achieving gradual cooling. The insulated wire core first enters the first cooling tank 16, where it comes into contact with the higher-temperature coolant and begins initial cooling. Then, the insulated wire core passes through subsequent cooling tanks 16 sequentially, with the coolant temperature in each tank gradually decreasing, allowing the insulated wire core to gradually cool down to the final required temperature. This gradual cooling method effectively avoids internal stress and surface defects in the insulation material caused by sudden temperature changes. This method not only improves product quality but also ensures the stability and efficiency of the production process. Depending on actual needs, the cooling unit can be equipped with multiple cooling tanks 16, typically no fewer than two. The number of cooling tanks 16 and the temperature of the coolant in each tank can be adjusted according to the requirements of the production process to achieve the best cooling effect.

[0052] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, 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. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An ultraviolet irradiation crosslinking device for cable insulation, characterized in that, include: Extruder head, used to wrap insulating material around a conductor to form an insulated wire core; An ultraviolet irradiation crosslinking machine is located on one side of the extruder head and is used to irradiate the insulated wire core formed by the extruder head with ultraviolet light. The traction unit has a first guide wheel located on the side of the extruder head and a second guide wheel located on the side of the ultraviolet irradiation crosslinking machine away from the extruder head. The first guide wheel moves against the conductor, and the second guide wheel moves against the insulated wire core. The first guide wheel and the second guide wheel are used to maintain tension on the conductor and the insulated wire core in the extruder head and the ultraviolet irradiation crosslinking machine, respectively. The conductor and the insulated wire core can change their positions simultaneously in the extruder head and the ultraviolet irradiation crosslinking machine due to the change in the height of the first guide wheel and the second guide wheel in the vertical direction of the traction unit, respectively, so as to ensure that the conductor and the insulated wire core are in the correct working positions in the extruder head and the ultraviolet irradiation crosslinking machine, respectively. A heating unit, located between the first guide wheel and the extruder head, is used to heat the conductor; A cooling unit, located to the side of the ultraviolet irradiation crosslinking machine, is used to cool the insulated wire core.

2. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 1, characterized in that, The traction assembly also includes: The first bracket is disposed on the side of the heating unit; The first support base has one end inserted into the first bracket and connected by a thread, and the first guide wheel is disposed on the first support base; The position of the first guide wheel in the vertical direction can change synchronously with the change in the vertical height of the first support base connected to the first bracket.

3. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 2, characterized in that, The first support base has several first guide wheels that are staggered and distributed on it. The first guide wheels move and abut against the two sides of the conductor in the vertical direction.

4. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 1, characterized in that, The traction assembly also includes a second support base located on the side of the ultraviolet irradiation crosslinking machine away from the extruder head, and the second guide wheel is threadedly connected to the second support base.

5. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 4, characterized in that, The second support base has a plurality of threaded holes in the vertical direction. The second guide wheel is threadedly connected to the threaded holes by bolts. The vertical position of the second guide wheel can be changed depending on which of the threaded holes the bolts are connected to.

6. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 2, characterized in that, The heating unit includes: A heat-conducting component is located on the movement path of the conductor, and the heat-conducting component is provided with a through hole, through which the conductor is drawn into the extruder head; A heating element is sleeved on the outer surface of the heat-conducting element, and the heating element heats the conductor through the heat-conducting element; A detection element, which is inserted into the heat-conducting element, is used to detect the surface temperature of the conductor.

7. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 6, characterized in that, The heating unit also includes: The second support is located between the first support and the extruder head; The third support base has one end inserted into the second bracket and connected by a thread. The heat-conducting element is connected to the third support base. The vertical height of the heat-conducting element can change synchronously with the change in the vertical height of the third support base connected to the second bracket, in order to prevent interference between the inner wall of the through hole and the conductor.

8. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 6, characterized in that, A connecting rod is provided on one side of the extruder head, and a channel is provided inside the connecting rod for the conductor to enter the extruder head. One end of the heat-conducting component is threadedly connected to the connecting rod, and the through hole communicates with the channel.

9. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 1, characterized in that, The cooling unit includes at least two cooling tanks, through which the insulated wire cores pass in sequence for cooling the insulated wire cores.

10. The ultraviolet irradiation crosslinking device for cable insulation as described in claim 9, characterized in that, Each cooling tank is filled with coolant, and the temperature of the coolant in the cooling tank gradually decreases, which is used to cool the insulated wire core in sections.

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