A conductor preheating device for a cable production line

Abstract

This utility model relates to the field of cable conductor technology and discloses a conductor preheating device for a cable production line, comprising: a preheating and insulation shell and an electromagnetic induction heating coil. An L-shaped bracket is slidably mounted on one side of the bottom of the preheating and insulation shell, and an electromagnetic induction heating coil is mounted on the top of one side of the L-shaped bracket. A servo motor is mounted on one side of the L-shaped bracket, and a gear that meshes with a rack is mounted on the bottom end of the output shaft of the servo motor. When the conductor transmission process stops, a Hall sensor detects that the support roller has stopped rotating, and then controls the servo motor to drive the gear to rotate. Through the meshing of the gear and the rack, combined with the sliding connection of the L-shaped bracket, the electromagnetic induction heating coil is moved to one side, so that the electromagnetic induction heating coil is away from the fixed preheating area. During the movement, the power supply to the electromagnetic induction heating coil is turned off to avoid the problem of local overheating caused by the conductor stopping during the preheating process.

Description

Technical Field

[0001] This utility model relates to the field of cable conductor technology, specifically a conductor preheating device for cable production lines. Background Technology

[0002] Conductor preheating devices in cable production lines are one of the key pieces of equipment in the cable manufacturing process. They are mainly used to preheat the conductor before the cable insulation layer is extruded. The conductor preheating device heats the conductor, raising its surface temperature, thereby enhancing the adhesion between the insulation material and the conductor.

[0003] For example, an existing Chinese patent (CN119480284A) discloses a conductor preheating device for a cable production line and a photovoltaic cable. Sealing gaskets are embedded on one side of the cable and on the outer wall of the housing and partition, respectively. The connection between the sealing gaskets and the cable is a sliding connection. A fan filter is embedded on the outer wall of the housing. A heating rod is installed directly below the fan filter and inside the preheating chamber. One end of the heating rod is fitted with a fixed base block, and two fixed base blocks are respectively located on the outer wall of the partition. Two sets of heating rods are arranged, each located on one side of the cable. The heating rods preheat the cable on one side. The control panel controls the operation of the fan filter, which generates airflow to blow the heating rods. The device generates hot air to preheat the cable inside the preheating chamber.

[0004] The above-mentioned technical solution preheats the conductor by resistance heating. However, this heating speed is relatively slow and the temperature control accuracy is low. In the existing technology, there are also some heating coils based on the principle of electromagnetic induction that are widely used for preheating conductors. This method has a fast heating speed, high efficiency, and can achieve precise temperature control. However, if the conductor malfunctions during transmission, such as stagnation, the electromagnetic heating coil is fixed and its heating area is relatively fixed. The stagnation of the conductor will cause the conductor in that area to be in a heated state for a long time, which can easily lead to local overheating. Utility Model Content

[0005] The purpose of this invention is to provide a conductor preheating device for cable production lines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a conductor preheating device for a cable production line, comprising: a preheating and insulation shell and an electromagnetic induction heating coil; an L-shaped bracket is slidably provided on one side of the bottom of the preheating and insulation shell; an electromagnetic induction heating coil is provided on the top of one side of the L-shaped bracket; a cable conductor is provided in the center of the electromagnetic induction heating coil; a rack is provided on one side of the bottom of the preheating and insulation shell; a servo motor is provided on one side of the L-shaped bracket; a gear that meshes with the rack is provided at the bottom end of the output shaft of the servo motor; brackets are provided at both ends of the preheating and insulation shell; a support roller is provided in the lower half of the bracket; and a Hall sensor is provided at one end of the support roller.

[0007] Furthermore, the bottom of the preheating and insulation shell is provided with a guide rail below the L-shaped bracket, and the L-shaped bracket can slide above the guide rail.

[0008] Furthermore, the preheating and insulation shell has inlet and outlet ports at both ends, and the support roller is located below the inlet and outlet ports.

[0009] Furthermore, the bracket has U-shaped grooves on both sides, and pressure rollers are provided inside the U-shaped grooves. Spring sleeves are provided at both ends of the pressure rollers, and a fixing plate is provided in the upper part of the U-shaped grooves.

[0010] Furthermore, the spring sleeve includes a spring and a fixing rod, the fixing rod is located on both sides of the pressure roller, the spring is located outside the fixing rod, and the top end of the spring abuts against the bottom surface of the fixing plate.

[0011] Furthermore, the pressure roller is located above the cable conductor.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the design of a preheating and insulation shell, a cable conductor, and an electromagnetic induction heating coil, enables the cable conductor to be preheated by a wire winding and unwinding mechanism within the preheating and insulation shell. When the conductor passes the electromagnetic induction heating coil, the coil is energized to preheat the conductor. If the conductor stops during transmission, a Hall sensor detects that the support roller has stopped rotating and then controls a servo motor to drive a gear. Through the engagement of the gear and rack, combined with the sliding connection of the L-shaped bracket, the electromagnetic induction heating coil is moved to one side, moving it away from the fixed preheating area. During this movement, the power to the electromagnetic induction heating coil is turned off, preventing localized overheating caused by the conductor stopping during preheating.

[0014] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0015] Figure 1This is a perspective view of a conductor preheating device for a cable production line according to the present invention;

[0016] Figure 2 This is a main sectional view of a conductor preheating device for a cable production line according to the present invention;

[0017] Figure 3 This is a perspective view of a conductor preheating device for a cable production line according to the present invention.

[0018] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0019] In the diagram: 1. Preheating and insulation shell; 2. Cable conductor; 3. L-shaped bracket; 4. Electromagnetic induction heating coil; 5. Guide rail; 6. Servo motor; 7. Gear; 8. Rack; 9. Bracket; 10. Support roller; 11. Pressure roller; 12. Spring sleeve rod; 13. Fixing plate; 14. Hall sensor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-4 This utility model provides a technical solution: a conductor preheating device for a cable production line, comprising: a preheating and insulation shell 1 and an electromagnetic induction heating coil 4. The preheating and insulation shell 1 provides a closed and insulated environment for conductor preheating, reducing heat loss and improving preheating efficiency. The electromagnetic induction heating coil 4 heats the conductor through the principle of electromagnetic induction, achieving fast heating speed, high efficiency, and precise temperature control. An L-shaped bracket 3 is slidably mounted on one side of the bottom of the preheating and insulation shell 1. The sliding design of the L-shaped bracket 3 allows the electromagnetic induction heating coil 4 to move as needed, thus moving away in time when the conductor stops, avoiding local overheating. The electromagnetic induction heating coil 4 is mounted on the top of one side of the L-shaped bracket 3, with a cable conductor 2 located in the center of the electromagnetic induction heating coil 4. A rack 8 is mounted on one side of the bottom of the preheating and insulation shell 1, and a servo motor 6 is mounted on one side of the L-shaped bracket 3. The bottom end of the output shaft of the servo motor 6 is equipped with a gear 7 that meshes with the rack 8. The servo motor 6 drives the gear 7 to mesh with the rack 8, achieving precise movement of the L-shaped bracket 3, thereby moving the electromagnetic induction heating coil 4 and ensuring timely adjustment of the heating coil position when the conductor stops.

[0022] The preheating and insulation shell 1 has brackets 9 at both ends, and a support roller 10 is provided on the lower half of the bracket 9. A Hall sensor 14 is provided on one end of the support roller 10. The brackets 9 provide support for the support roller 10, which is used to support and guide the cable conductor 2 through the preheating and insulation shell 1, ensuring the stability of conductor transmission. The Hall sensor 14 can monitor the rotation status of the support roller 10. When the conductor stops moving, causing the support roller 10 to stop rotating, the Hall sensor 14 can send a signal in time to trigger subsequent protection measures.

[0023] The bottom of the preheating and insulation shell 1 is provided with a guide rail 5 below the L-shaped bracket 3, allowing the L-shaped bracket 3 to slide above the guide rail 5. The guide rail 5 provides guidance for the sliding of the L-shaped bracket 3, ensuring the smoothness and accuracy of the bracket's movement, thereby driving the electromagnetic induction heating coil 4 to move stably.

[0024] The preheating and insulation shell 1 has inlet and outlet ports at both ends, and the support roller 10 is located below the inlet and outlet ports. The design of the inlet and outlet ports facilitates the entry and exit of the cable conductor 2, and the support roller 10 is located below the inlet and outlet ports to ensure that the conductor can be stably supported when entering and exiting the preheating and insulation shell 1.

[0025] The bracket 9 has U-shaped grooves on both sides, and a pressure roller 11 is installed inside the U-shaped groove. Spring sleeves 12 are located at both ends of the pressure roller 11, and a fixing plate 13 is located in the upper part of the U-shaped groove. The U-shaped grooves provide installation space for the pressure roller 11, which is used to press the cable conductor 2, ensuring that the conductor maintains a stable position during preheating. The design of the spring sleeves 12 allows the pressure roller 11 to float up and down as needed, adapting to conductors of different diameters; the fixing plate 13 provides support for the spring sleeves 12, ensuring the stability of the pressure roller 11.

[0026] The spring sleeve 12 includes a spring and a fixed rod. The fixed rod is located on both sides of the pressure roller 11, and the spring is located outside the fixed rod. The top of the spring abuts against the bottom surface of the fixed plate 13. The structural design of the spring sleeve 12 allows the pressure roller 11 to compress the spring downward when subjected to pressure, thereby adapting to changes in the conductor's diameter. The elastic force of the spring ensures that the pressure roller 11 always maintains a certain pressure on the conductor, preventing the conductor from jumping or shifting during the preheating process.

[0027] The pressure roller 11 is located above the cable conductor 2. The pressure roller 11 is located above the conductor to ensure that the conductor maintains a stable position during the preheating process and to prevent the conductor from affecting the preheating effect due to shaking or displacement.

[0028] During the preheating of the cable conductor, the conductor is driven through the preheating insulation shell 1 by the conductor winding and unwinding mechanism. When the conductor passes the electromagnetic induction heating coil 4, the electromagnetic induction heating coil 4 is energized to achieve the preheating of the conductor. When the conductor stops during transmission, the Hall sensor 14 detects that the support roller 10 stops rotating, and then controls the servo motor 6 to drive the gear 7 to rotate. Through the cooperation of the gear 7 and the rack 8, combined with the sliding connection of the L-shaped bracket 3, the electromagnetic induction heating coil 4 is moved to one side, so that the electromagnetic induction heating coil 4 is away from the fixed preheating area. During the movement, the power supply of the electromagnetic induction heating coil 4 is turned off to avoid the problem of local overheating caused by the conductor stopping during the preheating process.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A conductor preheating device for a cable production line, comprising: The preheating and heat preservation shell (1) and the electromagnetic induction heating coil (4) are characterized in that: an L-shaped bracket (3) is slidably provided on one side of the bottom of the preheating and heat preservation shell (1), an electromagnetic induction heating coil (4) is provided on the top of one side of the L-shaped bracket (3), a cable conductor (2) is provided in the center of the electromagnetic induction heating coil (4), a rack (8) is provided on one side of the bottom of the preheating and heat preservation shell (1), a servo motor (6) is provided on one side of the L-shaped bracket (3), a gear (7) that cooperates with the rack (8) is provided at the bottom end of the output shaft of the servo motor (6), a bracket (9) is provided at both ends of the preheating and heat preservation shell (1), a support roller (10) is provided in the lower half of the bracket (9), and a Hall sensor (14) is provided at one end of the support roller (10).

2. A conductor preheating device for a cable production line according to claim 1, characterized in that: The bottom of the preheating and insulation shell (1) is provided with a guide rail (5) below the L-shaped bracket (3), and the L-shaped bracket (3) can slide above the guide rail (5).

3. A conductor preheating device for a cable production line according to claim 1, characterized in that: The preheating and insulation shell (1) has inlet and outlet ports at both ends, and the support roller (10) is located below the inlet and outlet ports.

4. A conductor preheating device for a cable production line according to claim 1, characterized in that: The bracket (9) has U-shaped grooves on both sides, and pressure rollers (11) are provided inside the U-shaped grooves. Spring sleeve rods (12) are provided at both ends of the pressure rollers (11), and a fixing plate (13) is provided in the upper half of the U-shaped groove.

5. A conductor preheating device for a cable production line according to claim 4, characterized in that: The spring sleeve (12) includes a spring and a fixing rod. The fixing rod is located on both sides of the pressure roller (11), and the spring is located outside the fixing rod. The top of the spring abuts against the bottom surface of the fixing plate (13).

6. A conductor preheating device for a cable production line according to claim 5, characterized in that: The pressure roller (11) is located above the cable conductor (2).

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