High-frequency preheating device for coating multi-strand stranded enameled wire core

Abstract

The invention relates to the technical field of high-frequency preheating, and discloses a high-frequency preheating device for coating a multi-strand stranded enameled wire core, which comprises a main machine body, a preheating mechanism is arranged outside the main machine body, a mounting chamber is formed in the back surface of the main machine body, and a heat dissipation mechanism and an air guide mechanism are arranged inside the mounting chamber; the heat dissipation mechanism is used for conducting heat dissipation on the interior of the mounting chamber, the air guide mechanism is used for controlling the air outflow direction in the mounting chamber and controlling the air outlet to be switched between external air and the interior of the preheating mechanism, and a temperature sensor is fixedly connected to the interior of the mounting chamber; the preheating mechanism is used for preheating the metal wire core; by controlling the adjusting plate, the adjusting plate can conveniently and selectively seal the inner air cavity or the outer air cavity to adjust the air in the mounting chamber to flow out through the air outlet or flow out through the wire outlet through the outer thermal insulation box, so that different effects are achieved, the use flexibility of the device is effectively improved, and the use diversity of the device is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of high-frequency preheating, in particular to a high-frequency preheating device for coating a multi-strand twisted enameled wire core. Background Art

[0002] In the process of coating the multi-stranded enameled wire core, the plastic coating material is heat-melted, and then the hot-melt material is extruded into the outer layer of the wire core by an injection molding machine for coating. The coating of the wire core is mainly used to protect the wire core and provide an insulating environment for the wire core. However, when the wire core is directly coated, the coating material often cannot be well bonded to the wire core because the wire core is in a low temperature state. Therefore, in order to improve the coating effect, the wire core usually needs to be preheated before coating to improve the coating effect of the wire core.

[0003] In a Chinese patent with patent publication number CN214624553U, a cable core preheating device is disclosed, including a hot air blower, a support frame and a heating sleeve. The cable core can movably pass through the heating sleeve, and the heating sleeve is fixed to the upper end of the support frame. The outer wall of the heating sleeve is connected to the hot air blower through a heating air duct.

[0004] Although the above device solves the problem of wire core preheating, the overall structure is simple and the heating sleeve is in an exposed state. Not only is there a serious heat loss during preheating, resulting in a large amount of energy waste, but the exposed heating sleeve is also very likely to cause damage to the staff. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high-frequency preheating device for coating a multi-strand twisted enameled wire core, which has the advantages of effectively reducing heat loss during preheating, achieving energy saving, and being able to effectively utilize the lost heat.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A high-frequency preheating device for coating a multi-strand twisted enameled wire core comprises a main body, a preheating mechanism is arranged on the outside of the main body, an installation chamber is opened on the back of the main body, and a heat dissipation mechanism and an air guide mechanism are arranged inside the installation chamber;

[0008] The heat dissipation mechanism is used to dissipate heat inside the installation chamber, the air guide mechanism is used to control the outflow direction of gas inside the installation chamber, the air guide mechanism is used to control the switching of the air outlet between the external air and the inside of the preheating mechanism, and the interior of the installation chamber is fixedly connected with a temperature sensor;

[0009] The preheating mechanism is used to preheat the metal wire core.

[0010] Preferably: two groups of lead wheels and winding wheels are fixedly connected to the outside of the main body, the two groups of winding wheels are arranged on the upper and lower sides of the preheating mechanism, and the two groups of lead wheels are respectively located on the left and right sides of the upper winding wheel, and the lead wheels and winding wheels are used to guide the wire core to pass through the preheating mechanism so that the wire core can be preheated inside the preheating mechanism.

[0011] Preferably: the preheating mechanism includes an external insulation box fixedly connected to the outside of the main body, the tail end of the external insulation box extends to the inside of the installation room, the upper and lower parts of the external insulation box are respectively provided with wire openings, a heating component is arranged inside the external insulation box, and a preheating drive for driving the heating component to move inside the external insulation box is fixedly connected to the inside of the external insulation box.

[0012] Preferably: the outer temperature insulation box is fixedly connected to a sealing cover at the top of the wire port, a fixed wire roller is rotatably connected inside the wire port, and the top of the sealing cover is fixedly connected to a wire outlet.

[0013] Preferably: the heating assembly includes an outer box, the interior of the outer box is fixedly connected to an inner box, an insulation layer is provided between the outer box and the inner box, the interior of the inner box is fixedly connected to a wire tube, the exterior of the wire tube is wound with a coil group, and the upper and lower outlet positions of the wire tube are rotatably connected to movable wire rollers.

[0014] Preferably: the heat dissipation mechanism includes a bellows fixedly connected to the interior of the installation chamber, air inlets communicating with the outside are provided on both sides of the bellows, a fan is provided inside the main body, and the fan is used to introduce external air into the interior of the installation chamber through the bellows.

[0015] Preferably, a cooling pipe is provided inside the bellows, the cooling pipe includes but is not limited to a water cooling pipe, and the cooling pipe is distributed on the bottom surface of the bellows in a serpentine shape.

[0016] Preferably: the air guiding mechanism includes air induced draft bins distributed on both sides of the interior of the installation chamber, the air induced draft bins are fixedly connected to the interior of the installation chamber, the air induced draft bins are provided with an outer air cavity and an inner air cavity, an inner air guiding port is provided between the inner air cavity and the preheating mechanism for communication, the outer air cavity is provided with an air outlet for communication with the outside, and an adjustment plate is slidably connected to the outside of the air induced draft bins.

[0017] Preferably, a connecting strip is fixedly connected to the outside of the adjustment plate, a connecting gear is meshedly connected between the two connecting strips, and an adjustment drive for driving the connecting strip to slide is arranged on the outside of any one of the connecting strips.

[0018] Preferably, the regulating drive and the temperature sensor are electrically connected.

[0019] Beneficial effects of the present invention:

[0020] 1. The high-frequency preheating device for coating the multi-strand twisted enameled wire core uses a preheating drive to control the movement of the heating component inside the outer insulation box during the preheating process, controls the misalignment of the upper and lower ports and the wire port of the wire pipe, thereby effectively reducing the efficiency of the gas inside the wire pipe escaping to the outside, and at the same time, the outer box, inner box and insulation layer arranged on the outer layer of the wire pipe further improve the temperature loss inside the wire pipe, which not only effectively ensures the preheating effect of the wire core, but also effectively reduces the energy loss of the wire core preheating, thereby achieving the energy-saving effect of the wire core preheating, and the outer insulation box can effectively prevent the heating component from being directly and exposed to the outside, which can avoid burns caused by contact between the staff and the heating component, and ensure the safety of the wire core during preheating.

[0021] 2. The high-frequency preheating device for coating the core of the multi-strand twisted enameled wire is used to detect the temperature inside the installation room and the temperature inside the external insulation box through a temperature sensor. When the temperature inside the external insulation box is lower than the temperature of the installation room, the control adjustment plate is closed on the top of the external air cavity, so that the hot air flow inside the installation room flows into the interior of the external insulation box through the internal air cavity and the internal air guide port, thereby increasing the temperature inside the external insulation box and reducing the temperature difference between the outside of the outer box and the inside of the wire pipe, thereby reducing the temperature difference between the inside and outside of the heating component, thereby reducing the speed of temperature loss inside the heating component, thereby reducing energy loss.

[0022] 3. The high-frequency preheating device for coating the multi-strand twisted enameled wire core is closed outside the outer air cavity by controlling the adjustment plate, so that the airflow generated by the fan flows out through the outer insulation box, and because the gas temperature inside the outer insulation box is higher than the external temperature, the gas inside the outer insulation box flows out through the outlet, and the airflow with a certain temperature flows outside the wire core, so as to achieve the effect of preheating the wire core introduced into the preheating mechanism, so that the wire core entering the preheating mechanism has an initial temperature, avoiding drastic temperature changes in the wire core, which may cause damage to the wire core, and further improve the preheating effect of the wire core.

[0023] 4. The high-frequency preheating device for coating the core of the multi-strand twisted enameled wire can control the adjustment plate so that the adjustment plate can selectively close the inner air cavity or the outer air cavity, so as to adjust the internal gas of the installation room to flow out through the air outlet, or flow out through the outlet through the external insulation box, thereby achieving different effects, effectively improving the flexibility of use of the device, and effectively ensuring the diversity of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall front view of the wire core preheating device of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall back side of the wire core preheating device of the present invention and the interior of the installation chamber;

[0026] Figure 3It is a schematic diagram of the preheating mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the top structure of the external insulation box of the present invention;

[0028] Figure 5 It is a schematic diagram of the heating component of the present invention;

[0029] Figure 6 It is a cross-sectional schematic diagram of the heating component of the present invention;

[0030] Figure 7 It is a schematic diagram of the connection between the heat dissipation mechanism and the air guide mechanism of the present invention;

[0031] Figure 8 It is a schematic diagram of the adjustment plate, connecting strip, connecting gear and adjustment drive connection of the present invention.

[0032] In the figure: 1. main body; 11. installation room; 2. lead wheel; 3. winding wheel; 4. preheating mechanism; 5. heat dissipation mechanism; 6. air guide mechanism; 7. temperature sensor;

[0033] 41. External insulation box; 42. Wire port; 43. Fixed wire roller; 44. Sealing cover; 45. Wire outlet; 46. Heating assembly; 47. Preheating drive; 461. External box; 462. Internal box; 463. Insulation layer; 464. Wire tube; 465. Coil assembly; 466. Movable wire roller;

[0034] 51. bellows; 52. air inlet; 53. fan; 54. cooling pipe;

[0035] 61. Air induced chamber; 62. External air cavity; 63. Internal air cavity; 64. Internal air guide port; 65. Air outlet; 66. Adjustment plate; 67. Connecting strip; 68. Connecting gear; 69. Adjustment drive. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1

[0038] See also Figure 1 - Figure 5A high-frequency preheating device for coating a multi-strand twisted enameled wire core comprises a main body 1, a preheating mechanism 4 is arranged outside the main body 1, an installation chamber 11 is opened on the back of the main body 1, and a heat dissipation mechanism 5 and an air guide mechanism 6 are arranged inside the installation chamber 11;

[0039] The heat dissipation mechanism 5 is used to dissipate heat inside the installation room 11, the air guide mechanism 6 is used to control the outflow direction of the gas inside the installation room 11, and the air guide mechanism 6 is used to control the switching of the air outlet between the external air and the inside of the preheating mechanism 4. The inside of the installation room 11 is fixedly connected with a temperature sensor 7;

[0040] The preheating mechanism 4 is used to preheat the metal wire core.

[0041] The device is used to preheat the core of a multi-strand twisted enameled wire before sheathing, so as to improve the adhesion between the core and the sheathing material and improve the sheathing effect.

[0042] refer to Figure 1 In an optional embodiment: two sets of lead wheels 2 and winding wheels 3 are fixedly connected to the outside of the main body 1, and the two sets of winding wheels 3 are arranged on the upper and lower sides of the preheating mechanism 4. The two sets of lead wheels 2 are respectively located on the left and right sides of the upper winding wheel 3. The lead wheels 2 and winding wheels 3 are used to guide the wire core to pass through the preheating mechanism 4 so that the wire core can be preheated inside the preheating mechanism 4.

[0043] It should be noted that, during the coating process, the wire core passes through the wire lead wheel 2 , is wound between the upper and lower winding wheels 3 after passing through the wire lead wheel 2 , and is then led out by another wire lead wheel 2 .

[0044] The preheating mechanism 4 preheats the wire core between the upper and lower winding wheels 3 so that the wire core finally led out has an initial temperature.

[0045] refer to Figure 3 In an optional embodiment: the preheating mechanism 4 includes an external insulation box 41 fixedly connected to the outside of the main body 1, the tail end of the external insulation box 41 extends to the interior of the installation chamber 11, and the upper and lower parts of the external insulation box 41 are respectively provided with wire openings 42, and the interior of the external insulation box 41 is provided with a heating component 46, and the interior of the external insulation box 41 is fixedly connected with a preheating drive 47 for driving the heating component 46 to move inside the external insulation box 41.

[0046] refer to Figure 4 The outer temperature-isolating box 41 is located at the top of the wire port 42 and is fixedly connected to a sealing cover 44 . A fixed wire roller 43 is rotatably connected inside the wire port 42 . The top of the sealing cover 44 is fixedly connected to a wire outlet 45 .

[0047] It should be noted that when threading, the wire core enters and exits from the wire outlet 45, and two wire cores are maintained inside the heating component 46, which are a downward moving section and an upward moving section respectively. The heating component 46 is mainly used to heat the two wire cores.

[0048] The sealing cover 44 is configured as a double-layer cover, and the upper and lower sealing covers 44 are each provided with two wire outlets 45 , and the two wire outlets 45 are vertically facing the upper and lower winding wheels 3 .

[0049] When threading, the heating component 46 is facing the upper and lower wire openings 42 of the external insulation box 41. During preheating, the preheating drive 47 controls the heating component 46 to move inside the external insulation box 41, so that the wire openings of the heating component 46 and the upper and lower wire openings 42 of the external insulation box 41 are misaligned.

[0050] refer to Figure 5 and Figure 6 In an optional embodiment: the heating component 46 includes an outer box 461, the inner box 461 is fixedly connected to the inner box 462, an insulation layer 463 is provided between the outer box 461 and the inner box 462, a wire tube 464 is fixedly connected to the inner box 462, a coil group 465 is wound around the outside of the wire tube 464, and the upper and lower outlet positions of the wire tube 464 are rotatably connected to movable wire rollers 466.

[0051] It should be noted that when the wire core passes through the wire tube 464, the coil group 465 converts the electromagnetic field energy into heat energy through the eddy current effect generated by the high-frequency current, uniformly heats the wire core inside the wire tube 464, and preheats it through the high-frequency current, thereby facilitating and quickly heating the wire core, and the inside and outside of the wire core are heated synchronously to ensure the heating effect.

[0052] At the same time, during the preheating process, the preheating drive 47 is used to control the movement of the heating component 46 inside the outer insulation box 41, and the upper and lower ports of the wire tube 464 and the wire port 42 are controlled to be misaligned, thereby effectively reducing the efficiency of the internal gas of the wire tube 464 escaping to the outside. At the same time, the outer box 461, the inner box 462 and the insulation layer 463 arranged on the outer layer of the wire tube 464 further improve the temperature loss inside the wire tube 464, which not only effectively guarantees the preheating effect of the wire core, but also effectively reduces the energy loss of the wire core preheating, thereby achieving the effect of energy saving of the wire core preheating. The outer insulation box 41 can effectively prevent the heating component 46 from being directly and exposed to the outside, which can avoid burns caused by contact between the staff and the heating component 46, thereby ensuring the safety of the wire core during preheating.

[0053] The fixed wire roller 43 and the movable wire roller 466 are used to ensure the smooth movement of the wire core when the heating assembly 46 and the wire opening 42 are misaligned.

[0054] Embodiment 2

[0055] A high-frequency preheating device for coating a multi-strand twisted enameled wire core comprises a main body 1, a preheating mechanism 4 is arranged outside the main body 1, an installation chamber 11 is opened on the back of the main body 1, and a heat dissipation mechanism 5 and an air guide mechanism 6 are arranged inside the installation chamber 11;

[0056] The heat dissipation mechanism 5 is used to dissipate heat inside the installation room 11, the air guide mechanism 6 is used to control the outflow direction of the gas inside the installation room 11, and the air guide mechanism 6 is used to control the switching of the air outlet between the external air and the inside of the preheating mechanism 4. The inside of the installation room 11 is fixedly connected with a temperature sensor 7;

[0057] The preheating mechanism 4 is used to preheat the metal wire core.

[0058] refer to Figure 7 In an optional embodiment: the heat dissipation mechanism 5 includes a bellows 51 fixedly connected to the inside of the installation chamber 11, and air inlets 52 connected to the outside are opened on both sides of the bellows 51. A fan 53 is arranged inside the main body 1, and the fan 53 is used to introduce external air into the interior of the installation chamber 11 through the bellows 51.

[0059] It should be noted that the installation chamber 11 is used to install the main electrical components of the device, and the heat dissipation mechanism 5 is used to dissipate heat during the operation of the electrical components.

[0060] When dissipating heat, the fan 53 works, and the fan 53 draws gas through the bellows 51 and the air inlet 52. The gas flows into the installation room 11, and then flows to the outside, thereby completing the heat dissipation of the installation room 11 and ensuring the working stability of the main electrical components.

[0061] In an optional embodiment: a cooling pipe 54 is provided inside the bellows 51 . The cooling pipe 54 includes but is not limited to a water cooling pipe. The cooling pipe 54 is distributed on the bottom surface of the bellows 51 in a serpentine shape.

[0062] It should be noted that by adding the cooling pipe 54 and utilizing the cooling pipe 54 to cool the passing airflow, the initial temperature of the air blown into the installation chamber 11 by the fan 53 is reduced, and the cooling effect of the heat dissipation mechanism 5 is further increased.

[0063] The cooling pipe 54 is configured to be selectively opened and closed, thereby increasing the flexibility of heat dissipation.

[0064] refer to Figure 7 and Figure 8In an optional embodiment: the air guide mechanism 6 includes air induced bins 61 distributed on both sides of the installation chamber 11, the air induced bins 61 are fixedly connected to the interior of the installation chamber 11, the air induced bins 61 are provided with an outer air cavity 62 and an inner air cavity 63, an inner air guide port 64 for communication is provided between the inner air cavity 63 and the preheating mechanism 4, the outer air cavity 62 is provided with an air outlet 65 for communication with the outside, and an adjustment plate 66 is slidably connected to the outside of the air induced bin 61.

[0065] In an optional embodiment: a connecting strip 67 is fixedly connected to the outside of the adjustment plate 66, a connecting gear 68 is meshingly connected between the two connecting strips 67, and an adjustment drive 69 for driving the connecting strip 67 to slide is provided on the outside of any connecting strip 67.

[0066] It should be noted that by controlling the adjustment drive 69 to drive the adjustment plate 66 to slide inside the induced draft bin 61, the adjustment plate 66 can selectively close the outer air cavity 62 and the inner air cavity 63, and the outer air cavity 62 and the inner air cavity 63 on both sides remain in a synchronous state.

[0067] Among them, when the adjustment plate 66 closes the outer air cavity 62, the installation room 11 is connected to the outer insulation box 41 through the inner air cavity 63, the inner air guide port 64, and when the fan 53 introduces the air flow, the gas flows into the inner air cavity 63, and the hot air inside the installation room 11 enters the inner part of the outer insulation box 41, and then flows out from the outlet 45.

[0068] When the adjustment plate 66 closes the inner air cavity 63, the installation chamber 11 is connected to the outside through the outer air cavity 62 and the air outlet 65. When the fan 53 introduces airflow, the internal gas of the installation chamber 11 enters the outer air cavity 62, and then flows out to the outside through the air outlet 65, so that the hot air flows out to the outside.

[0069] In an optional embodiment: the adjustment drive 69 and the temperature sensor 7 are electrically connected.

[0070] It should be noted that the temperature sensor 7 is used to detect the temperature inside the installation room 11 and the temperature inside the external insulation box 41. When the temperature inside the external insulation box 41 is lower than the temperature of the installation room 11, the control adjustment plate 66 is closed at the top of the external air cavity 62, so that the hot air flow inside the installation room 11 flows into the interior of the external insulation box 41 through the internal air cavity 63 and the internal air guide port 64, thereby increasing the temperature inside the external insulation box 41.

[0071] By increasing the temperature of the outer insulation box 41, the temperature difference between the outside temperature of the outer box 461 and the inside temperature of the wire tube 464 is reduced, and then by reducing the temperature difference between the inside and outside of the heating component 46, the speed of temperature loss inside the heating component 46 is reduced, thereby reducing energy loss. The high-temperature gas inside the outer insulation box 41 flows into the interior of the sealing cover 44 through the upper and lower end wire ports 42, and then flows out from the outlet port 45. The outflowing airflow is sprayed along the transmission wire core in two directions, respectively, so as to achieve the effect of preheating the wire core outside the preheating mechanism 4 by using the sprayed airflow, thereby further improving the preheating effect of the wire core.

[0072] The inner air guide 64 is provided with a plurality of narrow and long slots running through from top to bottom (refer to Figure 3 ), so when the airflow inside the inner air cavity 63 enters the outer insulation box 41 through the inner air guide port 64, it is in a uniform upward and downward flow, so that the airflow inside the outer insulation box 41 is balanced through the upper and lower ends of the heating component 46 and then flows out from the wire port 42, then the gas flow rate outside the openings on both sides of the wire tube 464 is balanced, so that the internal air pressure of the wire tube 464 is constant, avoiding the internal gas of the wire tube 464 from flowing out, thereby achieving the effect of maintaining the internal temperature of the wire tube 464 constant.

[0073] During use, the temperature sensor 7 is used to monitor the temperature inside the installation chamber 11 and the temperature inside the external insulation box 41. When the temperature inside the external insulation box 41 is higher than the temperature of the installation chamber 11, the adjustment plate 66 can also be controlled to slide to the outside of the inner wind chamber 63, so that the adjustment plate 66 seals the inner wind chamber 63. At this time, the gas inside the installation chamber 11 flows out to the outside through the outer wind chamber 62 and the air outlet 65, avoiding the interference of the gas temperature inside the installation chamber 11 with the gas temperature inside the external insulation box 41, thereby effectively improving the flexibility of use of the device.

[0074] Furthermore, when the outside temperature is too low, the control regulating plate 66 can be closed on the outside of the outer air cavity 62, so that the airflow generated by the fan 53 flows out through the outer insulation box 41, and because the outer insulation box 41 is installed on the outside of the heating component 46, the outer insulation box 41 is connected to the heating component 46, so the outer insulation box 41 receives the heating component 46 and the gas inside the installation room 11, and the gas temperature inside the outer insulation box 41 is higher than the outside temperature, so that the gas inside the outer insulation box 41 flows out through the outlet 45, and the airflow with a certain temperature flows outside the wire core, so as to achieve the effect of preheating the wire core introduced into the preheating mechanism 4, so that the wire core entering the preheating mechanism 4 has an initial temperature, and avoids drastic temperature changes in the wire core, which causes damage to the wire core, further improves the preheating effect of the wire core, and effectively ensures the diversity of use of the device.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-frequency preheating device for coating a multi-stranded enameled wire core, comprising a main body (1), characterized in that: A preheating mechanism (4) is arranged outside the main body (1), an installation chamber (11) is provided on the back of the main body (1), and a heat dissipation mechanism (5) and an air guide mechanism (6) are arranged inside the installation chamber (11); The heat dissipation mechanism (5) is used to dissipate heat inside the installation chamber (11); the air guide mechanism (6) is used to control the outflow direction of gas inside the installation chamber (11); the air guide mechanism (6) is used to control the switching of the air outlet between the external air and the inside of the preheating mechanism (4); and a temperature sensor (7) is fixedly connected to the inside of the installation chamber (11); The preheating mechanism (4) is used to preheat the metal wire core.

2. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 1, characterized in that: Two sets of wire guide wheels (2) and winding wheels (3) are fixedly connected to the outside of the main body (1); the two sets of winding wheels (3) are arranged on the upper and lower sides of the preheating mechanism (4); the two sets of wire guide wheels (2) are respectively located on the left and right sides of the upper winding wheel (3); the wire guide wheels (2) and winding wheels (3) are used to guide the wire core to pass through the preheating mechanism (4), so that the wire core can be preheated inside the preheating mechanism (4).

3. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 1, characterized in that: The preheating mechanism (4) comprises an external temperature-insulating box (41) fixedly connected to the outside of the main body (1), the rear end of the external temperature-insulating box (41) extending to the interior of the installation chamber (11), the upper and lower parts of the external temperature-insulating box (41) are respectively provided with wire openings (42), the interior of the external temperature-insulating box (41) is provided with a heating component (46), and the interior of the external temperature-insulating box (41) is fixedly connected with a preheating drive (47) for driving the heating component (46) to move inside the external temperature-insulating box (41).

4. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 3, characterized in that: The outer temperature-isolating box (41) is fixedly connected to a sealing cover (44) at the top of the wire port (42), a fixed wire roller (43) is rotatably connected inside the wire port (42), and a wire outlet (45) is fixedly connected to the top of the sealing cover (44).

5. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 3, characterized in that: The heating component (46) includes an outer box (461), the inner layer box (461) is fixedly connected to the inner layer box (462), an insulation layer (463) is arranged between the outer box (461) and the inner box (462), the inner layer box (462) is fixedly connected to the inner layer box (464), the outer part of the wire tube (464) is wound with a coil group (465), and the upper and lower outlet positions of the wire tube (464) are rotatably connected to movable wire rollers (466).

6. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 1, characterized in that: The heat dissipation mechanism (5) comprises a bellows (51) fixedly connected to the interior of the installation chamber (11), air inlets (52) communicating with the outside are provided on both sides of the bellows (51), and a fan (53) is provided inside the main body (1), and the fan (53) is used to introduce external air into the interior of the installation chamber (11) through the bellows (51).

7. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 6, characterized in that: A cooling pipe (54) is arranged inside the bellows (51), and the cooling pipe (54) includes but is not limited to a water cooling pipe. The cooling pipe (54) is distributed in a serpentine shape on the bottom surface of the bellows (51).

8. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 6, characterized in that: The air guide mechanism (6) comprises air induction bins (61) distributed on both sides of the interior of the installation chamber (11); the air induction bins (61) are fixedly connected to the interior of the installation chamber (11); the air induction bins (61) are provided with an outer air cavity (62) and an inner air cavity (63); an inner air guide port (64) for communication is provided between the inner air cavity (63) and the preheating mechanism (4); the outer air cavity (62) is provided with an air outlet (65) for communication with the outside; and an adjustment plate (66) is slidably connected to the outside of the air induction bins (61).

9. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 8, characterized in that: The outside of the adjustment plate (66) is fixedly connected with a connecting strip (67), a connecting gear (68) is meshedly connected between the two connecting strips (67), and an adjustment drive (69) for driving the connecting strip (67) to slide is arranged outside any one of the connecting strips (67).

10. A high frequency preheating device for coating a multi-strand twisted enameled wire core according to claim 9, characterized in that: The regulating drive (69) and the temperature sensor (7) are electrically connected.

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